From 12fdcfdf55726da7f0eea7da131f7f709dbf2253 Mon Sep 17 00:00:00 2001 From: Cadey Dodrill Date: Thu, 26 Jan 2017 07:51:44 -0800 Subject: [PATCH] vendor update --- vendor-log | 42 + .../golang/protobuf/jsonpb/jsonpb.go | 843 +++++ .../protoc-gen-go/descriptor/descriptor.pb.go | 2065 +++++++++++++ .../grpc-gateway/runtime/context.go | 187 ++ .../grpc-gateway/runtime/convert.go | 58 + .../grpc-gateway/runtime/doc.go | 5 + .../grpc-gateway/runtime/errors.go | 121 + .../grpc-gateway/runtime/handler.go | 164 + .../runtime/internal/stream_chunk.pb.go | 93 + .../grpc-gateway/runtime/marshal_json.go | 37 + .../grpc-gateway/runtime/marshal_jsonpb.go | 184 ++ .../grpc-gateway/runtime/marshaler.go | 42 + .../runtime/marshaler_registry.go | 91 + .../grpc-gateway/runtime/mux.go | 132 + .../grpc-gateway/runtime/pattern.go | 227 ++ .../grpc-gateway/runtime/proto2_convert.go | 80 + .../grpc-gateway/runtime/query.go | 164 + .../googleapis/google/api/annotations.pb.go | 62 + .../googleapis/google/api/http.pb.go | 381 +++ .../grpc-gateway/utilities/doc.go | 2 + .../grpc-gateway/utilities/pattern.go | 22 + .../grpc-gateway/utilities/trie.go | 177 ++ .../x/net/http2/client_conn_pool.go | 256 ++ .../x/net/http2/configure_transport.go | 80 + vendor/golang.org/x/net/http2/errors.go | 130 + vendor/golang.org/x/net/http2/fixed_buffer.go | 60 + vendor/golang.org/x/net/http2/flow.go | 50 + vendor/golang.org/x/net/http2/frame.go | 1544 +++++++++ vendor/golang.org/x/net/http2/go16.go | 43 + vendor/golang.org/x/net/http2/go17.go | 106 + vendor/golang.org/x/net/http2/go17_not18.go | 36 + vendor/golang.org/x/net/http2/go18.go | 50 + vendor/golang.org/x/net/http2/go18_test.go | 66 + vendor/golang.org/x/net/http2/gotrack.go | 170 + vendor/golang.org/x/net/http2/headermap.go | 78 + vendor/golang.org/x/net/http2/hpack/encode.go | 251 ++ vendor/golang.org/x/net/http2/hpack/hpack.go | 542 ++++ .../golang.org/x/net/http2/hpack/huffman.go | 212 ++ vendor/golang.org/x/net/http2/hpack/tables.go | 352 +++ vendor/golang.org/x/net/http2/http2.go | 387 +++ vendor/golang.org/x/net/http2/not_go16.go | 46 + vendor/golang.org/x/net/http2/not_go17.go | 87 + vendor/golang.org/x/net/http2/not_go18.go | 27 + vendor/golang.org/x/net/http2/pipe.go | 153 + vendor/golang.org/x/net/http2/server.go | 2753 +++++++++++++++++ .../x/net/http2/server_push_test.go | 521 ++++ vendor/golang.org/x/net/http2/transport.go | 2129 +++++++++++++ vendor/golang.org/x/net/http2/write.go | 370 +++ vendor/golang.org/x/net/http2/writesched.go | 242 ++ .../x/net/http2/writesched_priority.go | 452 +++ .../x/net/http2/writesched_random.go | 72 + vendor/golang.org/x/net/idna/idna.go | 68 + vendor/golang.org/x/net/idna/punycode.go | 200 ++ .../x/net/internal/timeseries/timeseries.go | 525 ++++ .../golang.org/x/net/lex/httplex/httplex.go | 351 +++ vendor/golang.org/x/net/trace/events.go | 532 ++++ vendor/golang.org/x/net/trace/histogram.go | 365 +++ vendor/golang.org/x/net/trace/trace.go | 1079 +++++++ vendor/google.golang.org/grpc/backoff.go | 80 + vendor/google.golang.org/grpc/balancer.go | 400 +++ vendor/google.golang.org/grpc/call.go | 286 ++ vendor/google.golang.org/grpc/clientconn.go | 965 ++++++ .../grpc/codes/code_string.go | 16 + vendor/google.golang.org/grpc/codes/codes.go | 159 + .../grpc/credentials/credentials.go | 230 ++ .../grpc/credentials/credentials_util_go17.go | 76 + .../credentials/credentials_util_pre_go17.go | 74 + vendor/google.golang.org/grpc/doc.go | 6 + .../google.golang.org/grpc/grpclog/logger.go | 93 + vendor/google.golang.org/grpc/interceptor.go | 90 + .../grpc/internal/internal.go | 49 + .../grpc/metadata/metadata.go | 149 + .../google.golang.org/grpc/naming/naming.go | 74 + vendor/google.golang.org/grpc/peer/peer.go | 65 + vendor/google.golang.org/grpc/rpc_util.go | 519 ++++ vendor/google.golang.org/grpc/server.go | 1054 +++++++ .../google.golang.org/grpc/stats/handlers.go | 76 + vendor/google.golang.org/grpc/stats/stats.go | 223 ++ vendor/google.golang.org/grpc/stream.go | 625 ++++ vendor/google.golang.org/grpc/tap/tap.go | 54 + vendor/google.golang.org/grpc/trace.go | 119 + .../grpc/transport/control.go | 193 ++ .../google.golang.org/grpc/transport/go16.go | 46 + .../google.golang.org/grpc/transport/go17.go | 46 + .../grpc/transport/handler_server.go | 397 +++ .../grpc/transport/http2_client.go | 1129 +++++++ .../grpc/transport/http2_server.go | 835 +++++ .../grpc/transport/http_util.go | 513 +++ .../grpc/transport/pre_go16.go | 51 + .../grpc/transport/transport.go | 608 ++++ 90 files changed, 28864 insertions(+) create mode 100644 vendor/github.com/golang/protobuf/jsonpb/jsonpb.go create mode 100644 vendor/github.com/golang/protobuf/protoc-gen-go/descriptor/descriptor.pb.go create mode 100644 vendor/github.com/grpc-ecosystem/grpc-gateway/runtime/context.go create mode 100644 vendor/github.com/grpc-ecosystem/grpc-gateway/runtime/convert.go create mode 100644 vendor/github.com/grpc-ecosystem/grpc-gateway/runtime/doc.go create mode 100644 vendor/github.com/grpc-ecosystem/grpc-gateway/runtime/errors.go create mode 100644 vendor/github.com/grpc-ecosystem/grpc-gateway/runtime/handler.go create mode 100644 vendor/github.com/grpc-ecosystem/grpc-gateway/runtime/internal/stream_chunk.pb.go create mode 100644 vendor/github.com/grpc-ecosystem/grpc-gateway/runtime/marshal_json.go create mode 100644 vendor/github.com/grpc-ecosystem/grpc-gateway/runtime/marshal_jsonpb.go create mode 100644 vendor/github.com/grpc-ecosystem/grpc-gateway/runtime/marshaler.go create mode 100644 vendor/github.com/grpc-ecosystem/grpc-gateway/runtime/marshaler_registry.go create mode 100644 vendor/github.com/grpc-ecosystem/grpc-gateway/runtime/mux.go create mode 100644 vendor/github.com/grpc-ecosystem/grpc-gateway/runtime/pattern.go create mode 100644 vendor/github.com/grpc-ecosystem/grpc-gateway/runtime/proto2_convert.go create mode 100644 vendor/github.com/grpc-ecosystem/grpc-gateway/runtime/query.go create mode 100644 vendor/github.com/grpc-ecosystem/grpc-gateway/third_party/googleapis/google/api/annotations.pb.go create mode 100644 vendor/github.com/grpc-ecosystem/grpc-gateway/third_party/googleapis/google/api/http.pb.go create mode 100644 vendor/github.com/grpc-ecosystem/grpc-gateway/utilities/doc.go create mode 100644 vendor/github.com/grpc-ecosystem/grpc-gateway/utilities/pattern.go create mode 100644 vendor/github.com/grpc-ecosystem/grpc-gateway/utilities/trie.go create mode 100644 vendor/golang.org/x/net/http2/client_conn_pool.go create mode 100644 vendor/golang.org/x/net/http2/configure_transport.go create mode 100644 vendor/golang.org/x/net/http2/errors.go create mode 100644 vendor/golang.org/x/net/http2/fixed_buffer.go create mode 100644 vendor/golang.org/x/net/http2/flow.go create mode 100644 vendor/golang.org/x/net/http2/frame.go create mode 100644 vendor/golang.org/x/net/http2/go16.go create mode 100644 vendor/golang.org/x/net/http2/go17.go create mode 100644 vendor/golang.org/x/net/http2/go17_not18.go create mode 100644 vendor/golang.org/x/net/http2/go18.go create mode 100644 vendor/golang.org/x/net/http2/go18_test.go create mode 100644 vendor/golang.org/x/net/http2/gotrack.go create mode 100644 vendor/golang.org/x/net/http2/headermap.go create mode 100644 vendor/golang.org/x/net/http2/hpack/encode.go create mode 100644 vendor/golang.org/x/net/http2/hpack/hpack.go create mode 100644 vendor/golang.org/x/net/http2/hpack/huffman.go create mode 100644 vendor/golang.org/x/net/http2/hpack/tables.go create mode 100644 vendor/golang.org/x/net/http2/http2.go create mode 100644 vendor/golang.org/x/net/http2/not_go16.go create mode 100644 vendor/golang.org/x/net/http2/not_go17.go create mode 100644 vendor/golang.org/x/net/http2/not_go18.go create mode 100644 vendor/golang.org/x/net/http2/pipe.go create mode 100644 vendor/golang.org/x/net/http2/server.go create mode 100644 vendor/golang.org/x/net/http2/server_push_test.go create mode 100644 vendor/golang.org/x/net/http2/transport.go create mode 100644 vendor/golang.org/x/net/http2/write.go create mode 100644 vendor/golang.org/x/net/http2/writesched.go create mode 100644 vendor/golang.org/x/net/http2/writesched_priority.go create mode 100644 vendor/golang.org/x/net/http2/writesched_random.go create mode 100644 vendor/golang.org/x/net/idna/idna.go create mode 100644 vendor/golang.org/x/net/idna/punycode.go create mode 100644 vendor/golang.org/x/net/internal/timeseries/timeseries.go create mode 100644 vendor/golang.org/x/net/lex/httplex/httplex.go create mode 100644 vendor/golang.org/x/net/trace/events.go create mode 100644 vendor/golang.org/x/net/trace/histogram.go create mode 100644 vendor/golang.org/x/net/trace/trace.go create mode 100644 vendor/google.golang.org/grpc/backoff.go create mode 100644 vendor/google.golang.org/grpc/balancer.go create mode 100644 vendor/google.golang.org/grpc/call.go create mode 100644 vendor/google.golang.org/grpc/clientconn.go create mode 100644 vendor/google.golang.org/grpc/codes/code_string.go create mode 100644 vendor/google.golang.org/grpc/codes/codes.go create mode 100644 vendor/google.golang.org/grpc/credentials/credentials.go create mode 100644 vendor/google.golang.org/grpc/credentials/credentials_util_go17.go create mode 100644 vendor/google.golang.org/grpc/credentials/credentials_util_pre_go17.go create mode 100644 vendor/google.golang.org/grpc/doc.go create mode 100644 vendor/google.golang.org/grpc/grpclog/logger.go create mode 100644 vendor/google.golang.org/grpc/interceptor.go create mode 100644 vendor/google.golang.org/grpc/internal/internal.go create mode 100644 vendor/google.golang.org/grpc/metadata/metadata.go create mode 100644 vendor/google.golang.org/grpc/naming/naming.go create mode 100644 vendor/google.golang.org/grpc/peer/peer.go create mode 100644 vendor/google.golang.org/grpc/rpc_util.go create mode 100644 vendor/google.golang.org/grpc/server.go create mode 100644 vendor/google.golang.org/grpc/stats/handlers.go create mode 100644 vendor/google.golang.org/grpc/stats/stats.go create mode 100644 vendor/google.golang.org/grpc/stream.go create mode 100644 vendor/google.golang.org/grpc/tap/tap.go create mode 100644 vendor/google.golang.org/grpc/trace.go create mode 100644 vendor/google.golang.org/grpc/transport/control.go create mode 100644 vendor/google.golang.org/grpc/transport/go16.go create mode 100644 vendor/google.golang.org/grpc/transport/go17.go create mode 100644 vendor/google.golang.org/grpc/transport/handler_server.go create mode 100644 vendor/google.golang.org/grpc/transport/http2_client.go create mode 100644 vendor/google.golang.org/grpc/transport/http2_server.go create mode 100644 vendor/google.golang.org/grpc/transport/http_util.go create mode 100644 vendor/google.golang.org/grpc/transport/pre_go16.go create mode 100644 vendor/google.golang.org/grpc/transport/transport.go diff --git a/vendor-log b/vendor-log index 69382aa..b63bd47 100644 --- a/vendor-log +++ b/vendor-log @@ -31,3 +31,45 @@ bb797dc4fb8320488f47bf11de07a733d7233e1f github.com/kr/text f6b343c37ca80bfa8ea539da67a0b621f84fab1d golang.org/x/crypto/nacl/secretbox f6b343c37ca80bfa8ea539da67a0b621f84fab1d golang.org/x/crypto/poly1305 f6b343c37ca80bfa8ea539da67a0b621f84fab1d golang.org/x/crypto/salsa20/salsa +8ee79997227bf9b34611aee7946ae64735e6fd93 github.com/golang/protobuf/jsonpb +8ee79997227bf9b34611aee7946ae64735e6fd93 github.com/golang/protobuf/proto +8ee79997227bf9b34611aee7946ae64735e6fd93 github.com/golang/protobuf/protoc-gen-go/descriptor +cfee3c5f91d8b8b54b216781e246443bb73b1a8e github.com/grpc-ecosystem/grpc-gateway/runtime +cfee3c5f91d8b8b54b216781e246443bb73b1a8e github.com/grpc-ecosystem/grpc-gateway/runtime/internal +cfee3c5f91d8b8b54b216781e246443bb73b1a8e github.com/grpc-ecosystem/grpc-gateway/third_party/googleapis/google/api +cfee3c5f91d8b8b54b216781e246443bb73b1a8e github.com/grpc-ecosystem/grpc-gateway/utilities +45e771701b814666a7eb299e6c7a57d0b1799e91 golang.org/x/net/context +45e771701b814666a7eb299e6c7a57d0b1799e91 golang.org/x/net/http2 +45e771701b814666a7eb299e6c7a57d0b1799e91 golang.org/x/net/http2/hpack +45e771701b814666a7eb299e6c7a57d0b1799e91 golang.org/x/net/idna +45e771701b814666a7eb299e6c7a57d0b1799e91 golang.org/x/net/internal/timeseries +45e771701b814666a7eb299e6c7a57d0b1799e91 golang.org/x/net/lex/httplex +45e771701b814666a7eb299e6c7a57d0b1799e91 golang.org/x/net/trace +0e6ec3a4501ee9ee2d023abe92e436fd04ed4081 google.golang.org/grpc +0e6ec3a4501ee9ee2d023abe92e436fd04ed4081 google.golang.org/grpc/codes +0e6ec3a4501ee9ee2d023abe92e436fd04ed4081 google.golang.org/grpc/credentials +0e6ec3a4501ee9ee2d023abe92e436fd04ed4081 google.golang.org/grpc/grpclog +0e6ec3a4501ee9ee2d023abe92e436fd04ed4081 google.golang.org/grpc/internal +0e6ec3a4501ee9ee2d023abe92e436fd04ed4081 google.golang.org/grpc/metadata +0e6ec3a4501ee9ee2d023abe92e436fd04ed4081 google.golang.org/grpc/naming +0e6ec3a4501ee9ee2d023abe92e436fd04ed4081 google.golang.org/grpc/peer +0e6ec3a4501ee9ee2d023abe92e436fd04ed4081 google.golang.org/grpc/transport +8ee79997227bf9b34611aee7946ae64735e6fd93 github.com/golang/protobuf/proto +f2499483f923065a842d38eb4c7f1927e6fc6e6d golang.org/x/net/context +f2499483f923065a842d38eb4c7f1927e6fc6e6d golang.org/x/net/http2 +f2499483f923065a842d38eb4c7f1927e6fc6e6d golang.org/x/net/http2/hpack +f2499483f923065a842d38eb4c7f1927e6fc6e6d golang.org/x/net/idna +f2499483f923065a842d38eb4c7f1927e6fc6e6d golang.org/x/net/internal/timeseries +f2499483f923065a842d38eb4c7f1927e6fc6e6d golang.org/x/net/lex/httplex +f2499483f923065a842d38eb4c7f1927e6fc6e6d golang.org/x/net/trace +50955793b0183f9de69bd78e2ec251cf20aab121 google.golang.org/grpc +50955793b0183f9de69bd78e2ec251cf20aab121 google.golang.org/grpc/codes +50955793b0183f9de69bd78e2ec251cf20aab121 google.golang.org/grpc/credentials +50955793b0183f9de69bd78e2ec251cf20aab121 google.golang.org/grpc/grpclog +50955793b0183f9de69bd78e2ec251cf20aab121 google.golang.org/grpc/internal +50955793b0183f9de69bd78e2ec251cf20aab121 google.golang.org/grpc/metadata +50955793b0183f9de69bd78e2ec251cf20aab121 google.golang.org/grpc/naming +50955793b0183f9de69bd78e2ec251cf20aab121 google.golang.org/grpc/peer +50955793b0183f9de69bd78e2ec251cf20aab121 google.golang.org/grpc/stats +50955793b0183f9de69bd78e2ec251cf20aab121 google.golang.org/grpc/tap +50955793b0183f9de69bd78e2ec251cf20aab121 google.golang.org/grpc/transport diff --git a/vendor/github.com/golang/protobuf/jsonpb/jsonpb.go b/vendor/github.com/golang/protobuf/jsonpb/jsonpb.go new file mode 100644 index 0000000..82c6162 --- /dev/null +++ b/vendor/github.com/golang/protobuf/jsonpb/jsonpb.go @@ -0,0 +1,843 @@ +// Go support for Protocol Buffers - Google's data interchange format +// +// Copyright 2015 The Go Authors. All rights reserved. +// https://github.com/golang/protobuf +// +// Redistribution and use in source and binary forms, with or without +// modification, are permitted provided that the following conditions are +// met: +// +// * Redistributions of source code must retain the above copyright +// notice, this list of conditions and the following disclaimer. +// * Redistributions in binary form must reproduce the above +// copyright notice, this list of conditions and the following disclaimer +// in the documentation and/or other materials provided with the +// distribution. +// * Neither the name of Google Inc. nor the names of its +// contributors may be used to endorse or promote products derived from +// this software without specific prior written permission. +// +// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS +// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT +// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR +// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT +// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, +// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT +// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, +// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY +// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE +// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + +/* +Package jsonpb provides marshaling and unmarshaling between protocol buffers and JSON. +It follows the specification at https://developers.google.com/protocol-buffers/docs/proto3#json. + +This package produces a different output than the standard "encoding/json" package, +which does not operate correctly on protocol buffers. +*/ +package jsonpb + +import ( + "bytes" + "encoding/json" + "errors" + "fmt" + "io" + "reflect" + "sort" + "strconv" + "strings" + "time" + + "github.com/golang/protobuf/proto" +) + +// Marshaler is a configurable object for converting between +// protocol buffer objects and a JSON representation for them. +type Marshaler struct { + // Whether to render enum values as integers, as opposed to string values. + EnumsAsInts bool + + // Whether to render fields with zero values. + EmitDefaults bool + + // A string to indent each level by. The presence of this field will + // also cause a space to appear between the field separator and + // value, and for newlines to be appear between fields and array + // elements. + Indent string + + // Whether to use the original (.proto) name for fields. + OrigName bool +} + +// Marshal marshals a protocol buffer into JSON. +func (m *Marshaler) Marshal(out io.Writer, pb proto.Message) error { + writer := &errWriter{writer: out} + return m.marshalObject(writer, pb, "", "") +} + +// MarshalToString converts a protocol buffer object to JSON string. +func (m *Marshaler) MarshalToString(pb proto.Message) (string, error) { + var buf bytes.Buffer + if err := m.Marshal(&buf, pb); err != nil { + return "", err + } + return buf.String(), nil +} + +type int32Slice []int32 + +// For sorting extensions ids to ensure stable output. +func (s int32Slice) Len() int { return len(s) } +func (s int32Slice) Less(i, j int) bool { return s[i] < s[j] } +func (s int32Slice) Swap(i, j int) { s[i], s[j] = s[j], s[i] } + +type wkt interface { + XXX_WellKnownType() string +} + +// marshalObject writes a struct to the Writer. +func (m *Marshaler) marshalObject(out *errWriter, v proto.Message, indent, typeURL string) error { + s := reflect.ValueOf(v).Elem() + + // Handle well-known types. + if wkt, ok := v.(wkt); ok { + switch wkt.XXX_WellKnownType() { + case "DoubleValue", "FloatValue", "Int64Value", "UInt64Value", + "Int32Value", "UInt32Value", "BoolValue", "StringValue", "BytesValue": + // "Wrappers use the same representation in JSON + // as the wrapped primitive type, ..." + sprop := proto.GetProperties(s.Type()) + return m.marshalValue(out, sprop.Prop[0], s.Field(0), indent) + case "Any": + // Any is a bit more involved. + return m.marshalAny(out, v, indent) + case "Duration": + // "Generated output always contains 3, 6, or 9 fractional digits, + // depending on required precision." + s, ns := s.Field(0).Int(), s.Field(1).Int() + d := time.Duration(s)*time.Second + time.Duration(ns)*time.Nanosecond + x := fmt.Sprintf("%.9f", d.Seconds()) + x = strings.TrimSuffix(x, "000") + x = strings.TrimSuffix(x, "000") + out.write(`"`) + out.write(x) + out.write(`s"`) + return out.err + case "Struct": + // Let marshalValue handle the `fields` map. + // TODO: pass the correct Properties if needed. + return m.marshalValue(out, &proto.Properties{}, s.Field(0), indent) + case "Timestamp": + // "RFC 3339, where generated output will always be Z-normalized + // and uses 3, 6 or 9 fractional digits." + s, ns := s.Field(0).Int(), s.Field(1).Int() + t := time.Unix(s, ns).UTC() + // time.RFC3339Nano isn't exactly right (we need to get 3/6/9 fractional digits). + x := t.Format("2006-01-02T15:04:05.000000000") + x = strings.TrimSuffix(x, "000") + x = strings.TrimSuffix(x, "000") + out.write(`"`) + out.write(x) + out.write(`Z"`) + return out.err + case "Value": + // Value has a single oneof. + kind := s.Field(0) + if kind.IsNil() { + // "absence of any variant indicates an error" + return errors.New("nil Value") + } + // oneof -> *T -> T -> T.F + x := kind.Elem().Elem().Field(0) + // TODO: pass the correct Properties if needed. + return m.marshalValue(out, &proto.Properties{}, x, indent) + } + } + + out.write("{") + if m.Indent != "" { + out.write("\n") + } + + firstField := true + + if typeURL != "" { + if err := m.marshalTypeURL(out, indent, typeURL); err != nil { + return err + } + firstField = false + } + + for i := 0; i < s.NumField(); i++ { + value := s.Field(i) + valueField := s.Type().Field(i) + if strings.HasPrefix(valueField.Name, "XXX_") { + continue + } + + // IsNil will panic on most value kinds. + switch value.Kind() { + case reflect.Chan, reflect.Func, reflect.Interface, reflect.Map, reflect.Ptr, reflect.Slice: + if value.IsNil() { + continue + } + } + + if !m.EmitDefaults { + switch value.Kind() { + case reflect.Bool: + if !value.Bool() { + continue + } + case reflect.Int32, reflect.Int64: + if value.Int() == 0 { + continue + } + case reflect.Uint32, reflect.Uint64: + if value.Uint() == 0 { + continue + } + case reflect.Float32, reflect.Float64: + if value.Float() == 0 { + continue + } + case reflect.String: + if value.Len() == 0 { + continue + } + } + } + + // Oneof fields need special handling. + if valueField.Tag.Get("protobuf_oneof") != "" { + // value is an interface containing &T{real_value}. + sv := value.Elem().Elem() // interface -> *T -> T + value = sv.Field(0) + valueField = sv.Type().Field(0) + } + prop := jsonProperties(valueField, m.OrigName) + if !firstField { + m.writeSep(out) + } + if err := m.marshalField(out, prop, value, indent); err != nil { + return err + } + firstField = false + } + + // Handle proto2 extensions. + if ep, ok := v.(proto.Message); ok { + extensions := proto.RegisteredExtensions(v) + // Sort extensions for stable output. + ids := make([]int32, 0, len(extensions)) + for id, desc := range extensions { + if !proto.HasExtension(ep, desc) { + continue + } + ids = append(ids, id) + } + sort.Sort(int32Slice(ids)) + for _, id := range ids { + desc := extensions[id] + if desc == nil { + // unknown extension + continue + } + ext, extErr := proto.GetExtension(ep, desc) + if extErr != nil { + return extErr + } + value := reflect.ValueOf(ext) + var prop proto.Properties + prop.Parse(desc.Tag) + prop.JSONName = fmt.Sprintf("[%s]", desc.Name) + if !firstField { + m.writeSep(out) + } + if err := m.marshalField(out, &prop, value, indent); err != nil { + return err + } + firstField = false + } + + } + + if m.Indent != "" { + out.write("\n") + out.write(indent) + } + out.write("}") + return out.err +} + +func (m *Marshaler) writeSep(out *errWriter) { + if m.Indent != "" { + out.write(",\n") + } else { + out.write(",") + } +} + +func (m *Marshaler) marshalAny(out *errWriter, any proto.Message, indent string) error { + // "If the Any contains a value that has a special JSON mapping, + // it will be converted as follows: {"@type": xxx, "value": yyy}. + // Otherwise, the value will be converted into a JSON object, + // and the "@type" field will be inserted to indicate the actual data type." + v := reflect.ValueOf(any).Elem() + turl := v.Field(0).String() + val := v.Field(1).Bytes() + + // Only the part of type_url after the last slash is relevant. + mname := turl + if slash := strings.LastIndex(mname, "/"); slash >= 0 { + mname = mname[slash+1:] + } + mt := proto.MessageType(mname) + if mt == nil { + return fmt.Errorf("unknown message type %q", mname) + } + msg := reflect.New(mt.Elem()).Interface().(proto.Message) + if err := proto.Unmarshal(val, msg); err != nil { + return err + } + + if _, ok := msg.(wkt); ok { + out.write("{") + if m.Indent != "" { + out.write("\n") + } + if err := m.marshalTypeURL(out, indent, turl); err != nil { + return err + } + m.writeSep(out) + if m.Indent != "" { + out.write(indent) + out.write(m.Indent) + out.write(`"value": `) + } else { + out.write(`"value":`) + } + if err := m.marshalObject(out, msg, indent+m.Indent, ""); err != nil { + return err + } + if m.Indent != "" { + out.write("\n") + out.write(indent) + } + out.write("}") + return out.err + } + + return m.marshalObject(out, msg, indent, turl) +} + +func (m *Marshaler) marshalTypeURL(out *errWriter, indent, typeURL string) error { + if m.Indent != "" { + out.write(indent) + out.write(m.Indent) + } + out.write(`"@type":`) + if m.Indent != "" { + out.write(" ") + } + b, err := json.Marshal(typeURL) + if err != nil { + return err + } + out.write(string(b)) + return out.err +} + +// marshalField writes field description and value to the Writer. +func (m *Marshaler) marshalField(out *errWriter, prop *proto.Properties, v reflect.Value, indent string) error { + if m.Indent != "" { + out.write(indent) + out.write(m.Indent) + } + out.write(`"`) + out.write(prop.JSONName) + out.write(`":`) + if m.Indent != "" { + out.write(" ") + } + if err := m.marshalValue(out, prop, v, indent); err != nil { + return err + } + return nil +} + +// marshalValue writes the value to the Writer. +func (m *Marshaler) marshalValue(out *errWriter, prop *proto.Properties, v reflect.Value, indent string) error { + + var err error + v = reflect.Indirect(v) + + // Handle repeated elements. + if v.Kind() == reflect.Slice && v.Type().Elem().Kind() != reflect.Uint8 { + out.write("[") + comma := "" + for i := 0; i < v.Len(); i++ { + sliceVal := v.Index(i) + out.write(comma) + if m.Indent != "" { + out.write("\n") + out.write(indent) + out.write(m.Indent) + out.write(m.Indent) + } + if err := m.marshalValue(out, prop, sliceVal, indent+m.Indent); err != nil { + return err + } + comma = "," + } + if m.Indent != "" { + out.write("\n") + out.write(indent) + out.write(m.Indent) + } + out.write("]") + return out.err + } + + // Handle well-known types. + // Most are handled up in marshalObject (because 99% are messages). + type wkt interface { + XXX_WellKnownType() string + } + if wkt, ok := v.Interface().(wkt); ok { + switch wkt.XXX_WellKnownType() { + case "NullValue": + out.write("null") + return out.err + } + } + + // Handle enumerations. + if !m.EnumsAsInts && prop.Enum != "" { + // Unknown enum values will are stringified by the proto library as their + // value. Such values should _not_ be quoted or they will be interpreted + // as an enum string instead of their value. + enumStr := v.Interface().(fmt.Stringer).String() + var valStr string + if v.Kind() == reflect.Ptr { + valStr = strconv.Itoa(int(v.Elem().Int())) + } else { + valStr = strconv.Itoa(int(v.Int())) + } + isKnownEnum := enumStr != valStr + if isKnownEnum { + out.write(`"`) + } + out.write(enumStr) + if isKnownEnum { + out.write(`"`) + } + return out.err + } + + // Handle nested messages. + if v.Kind() == reflect.Struct { + return m.marshalObject(out, v.Addr().Interface().(proto.Message), indent+m.Indent, "") + } + + // Handle maps. + // Since Go randomizes map iteration, we sort keys for stable output. + if v.Kind() == reflect.Map { + out.write(`{`) + keys := v.MapKeys() + sort.Sort(mapKeys(keys)) + for i, k := range keys { + if i > 0 { + out.write(`,`) + } + if m.Indent != "" { + out.write("\n") + out.write(indent) + out.write(m.Indent) + out.write(m.Indent) + } + + b, err := json.Marshal(k.Interface()) + if err != nil { + return err + } + s := string(b) + + // If the JSON is not a string value, encode it again to make it one. + if !strings.HasPrefix(s, `"`) { + b, err := json.Marshal(s) + if err != nil { + return err + } + s = string(b) + } + + out.write(s) + out.write(`:`) + if m.Indent != "" { + out.write(` `) + } + + if err := m.marshalValue(out, prop, v.MapIndex(k), indent+m.Indent); err != nil { + return err + } + } + if m.Indent != "" { + out.write("\n") + out.write(indent) + out.write(m.Indent) + } + out.write(`}`) + return out.err + } + + // Default handling defers to the encoding/json library. + b, err := json.Marshal(v.Interface()) + if err != nil { + return err + } + needToQuote := string(b[0]) != `"` && (v.Kind() == reflect.Int64 || v.Kind() == reflect.Uint64) + if needToQuote { + out.write(`"`) + } + out.write(string(b)) + if needToQuote { + out.write(`"`) + } + return out.err +} + +// Unmarshaler is a configurable object for converting from a JSON +// representation to a protocol buffer object. +type Unmarshaler struct { + // Whether to allow messages to contain unknown fields, as opposed to + // failing to unmarshal. + AllowUnknownFields bool +} + +// UnmarshalNext unmarshals the next protocol buffer from a JSON object stream. +// This function is lenient and will decode any options permutations of the +// related Marshaler. +func (u *Unmarshaler) UnmarshalNext(dec *json.Decoder, pb proto.Message) error { + inputValue := json.RawMessage{} + if err := dec.Decode(&inputValue); err != nil { + return err + } + return u.unmarshalValue(reflect.ValueOf(pb).Elem(), inputValue, nil) +} + +// Unmarshal unmarshals a JSON object stream into a protocol +// buffer. This function is lenient and will decode any options +// permutations of the related Marshaler. +func (u *Unmarshaler) Unmarshal(r io.Reader, pb proto.Message) error { + dec := json.NewDecoder(r) + return u.UnmarshalNext(dec, pb) +} + +// UnmarshalNext unmarshals the next protocol buffer from a JSON object stream. +// This function is lenient and will decode any options permutations of the +// related Marshaler. +func UnmarshalNext(dec *json.Decoder, pb proto.Message) error { + return new(Unmarshaler).UnmarshalNext(dec, pb) +} + +// Unmarshal unmarshals a JSON object stream into a protocol +// buffer. This function is lenient and will decode any options +// permutations of the related Marshaler. +func Unmarshal(r io.Reader, pb proto.Message) error { + return new(Unmarshaler).Unmarshal(r, pb) +} + +// UnmarshalString will populate the fields of a protocol buffer based +// on a JSON string. This function is lenient and will decode any options +// permutations of the related Marshaler. +func UnmarshalString(str string, pb proto.Message) error { + return new(Unmarshaler).Unmarshal(strings.NewReader(str), pb) +} + +// unmarshalValue converts/copies a value into the target. +// prop may be nil. +func (u *Unmarshaler) unmarshalValue(target reflect.Value, inputValue json.RawMessage, prop *proto.Properties) error { + targetType := target.Type() + + // Allocate memory for pointer fields. + if targetType.Kind() == reflect.Ptr { + target.Set(reflect.New(targetType.Elem())) + return u.unmarshalValue(target.Elem(), inputValue, prop) + } + + // Handle well-known types. + type wkt interface { + XXX_WellKnownType() string + } + if wkt, ok := target.Addr().Interface().(wkt); ok { + switch wkt.XXX_WellKnownType() { + case "DoubleValue", "FloatValue", "Int64Value", "UInt64Value", + "Int32Value", "UInt32Value", "BoolValue", "StringValue", "BytesValue": + // "Wrappers use the same representation in JSON + // as the wrapped primitive type, except that null is allowed." + // encoding/json will turn JSON `null` into Go `nil`, + // so we don't have to do any extra work. + return u.unmarshalValue(target.Field(0), inputValue, prop) + case "Any": + return fmt.Errorf("unmarshaling Any not supported yet") + case "Duration": + ivStr := string(inputValue) + if ivStr == "null" { + target.Field(0).SetInt(0) + target.Field(1).SetInt(0) + return nil + } + + unq, err := strconv.Unquote(ivStr) + if err != nil { + return err + } + d, err := time.ParseDuration(unq) + if err != nil { + return fmt.Errorf("bad Duration: %v", err) + } + ns := d.Nanoseconds() + s := ns / 1e9 + ns %= 1e9 + target.Field(0).SetInt(s) + target.Field(1).SetInt(ns) + return nil + case "Timestamp": + ivStr := string(inputValue) + if ivStr == "null" { + target.Field(0).SetInt(0) + target.Field(1).SetInt(0) + return nil + } + + unq, err := strconv.Unquote(ivStr) + if err != nil { + return err + } + t, err := time.Parse(time.RFC3339Nano, unq) + if err != nil { + return fmt.Errorf("bad Timestamp: %v", err) + } + target.Field(0).SetInt(int64(t.Unix())) + target.Field(1).SetInt(int64(t.Nanosecond())) + return nil + } + } + + // Handle enums, which have an underlying type of int32, + // and may appear as strings. + // The case of an enum appearing as a number is handled + // at the bottom of this function. + if inputValue[0] == '"' && prop != nil && prop.Enum != "" { + vmap := proto.EnumValueMap(prop.Enum) + // Don't need to do unquoting; valid enum names + // are from a limited character set. + s := inputValue[1 : len(inputValue)-1] + n, ok := vmap[string(s)] + if !ok { + return fmt.Errorf("unknown value %q for enum %s", s, prop.Enum) + } + if target.Kind() == reflect.Ptr { // proto2 + target.Set(reflect.New(targetType.Elem())) + target = target.Elem() + } + target.SetInt(int64(n)) + return nil + } + + // Handle nested messages. + if targetType.Kind() == reflect.Struct { + var jsonFields map[string]json.RawMessage + if err := json.Unmarshal(inputValue, &jsonFields); err != nil { + return err + } + + consumeField := func(prop *proto.Properties) (json.RawMessage, bool) { + // Be liberal in what names we accept; both orig_name and camelName are okay. + fieldNames := acceptedJSONFieldNames(prop) + + vOrig, okOrig := jsonFields[fieldNames.orig] + vCamel, okCamel := jsonFields[fieldNames.camel] + if !okOrig && !okCamel { + return nil, false + } + // If, for some reason, both are present in the data, favour the camelName. + var raw json.RawMessage + if okOrig { + raw = vOrig + delete(jsonFields, fieldNames.orig) + } + if okCamel { + raw = vCamel + delete(jsonFields, fieldNames.camel) + } + return raw, true + } + + sprops := proto.GetProperties(targetType) + for i := 0; i < target.NumField(); i++ { + ft := target.Type().Field(i) + if strings.HasPrefix(ft.Name, "XXX_") { + continue + } + + valueForField, ok := consumeField(sprops.Prop[i]) + if !ok { + continue + } + + if err := u.unmarshalValue(target.Field(i), valueForField, sprops.Prop[i]); err != nil { + return err + } + } + // Check for any oneof fields. + if len(jsonFields) > 0 { + for _, oop := range sprops.OneofTypes { + raw, ok := consumeField(oop.Prop) + if !ok { + continue + } + nv := reflect.New(oop.Type.Elem()) + target.Field(oop.Field).Set(nv) + if err := u.unmarshalValue(nv.Elem().Field(0), raw, oop.Prop); err != nil { + return err + } + } + } + if !u.AllowUnknownFields && len(jsonFields) > 0 { + // Pick any field to be the scapegoat. + var f string + for fname := range jsonFields { + f = fname + break + } + return fmt.Errorf("unknown field %q in %v", f, targetType) + } + return nil + } + + // Handle arrays (which aren't encoded bytes) + if targetType.Kind() == reflect.Slice && targetType.Elem().Kind() != reflect.Uint8 { + var slc []json.RawMessage + if err := json.Unmarshal(inputValue, &slc); err != nil { + return err + } + len := len(slc) + target.Set(reflect.MakeSlice(targetType, len, len)) + for i := 0; i < len; i++ { + if err := u.unmarshalValue(target.Index(i), slc[i], prop); err != nil { + return err + } + } + return nil + } + + // Handle maps (whose keys are always strings) + if targetType.Kind() == reflect.Map { + var mp map[string]json.RawMessage + if err := json.Unmarshal(inputValue, &mp); err != nil { + return err + } + target.Set(reflect.MakeMap(targetType)) + var keyprop, valprop *proto.Properties + if prop != nil { + // These could still be nil if the protobuf metadata is broken somehow. + // TODO: This won't work because the fields are unexported. + // We should probably just reparse them. + //keyprop, valprop = prop.mkeyprop, prop.mvalprop + } + for ks, raw := range mp { + // Unmarshal map key. The core json library already decoded the key into a + // string, so we handle that specially. Other types were quoted post-serialization. + var k reflect.Value + if targetType.Key().Kind() == reflect.String { + k = reflect.ValueOf(ks) + } else { + k = reflect.New(targetType.Key()).Elem() + if err := u.unmarshalValue(k, json.RawMessage(ks), keyprop); err != nil { + return err + } + } + + // Unmarshal map value. + v := reflect.New(targetType.Elem()).Elem() + if err := u.unmarshalValue(v, raw, valprop); err != nil { + return err + } + target.SetMapIndex(k, v) + } + return nil + } + + // 64-bit integers can be encoded as strings. In this case we drop + // the quotes and proceed as normal. + isNum := targetType.Kind() == reflect.Int64 || targetType.Kind() == reflect.Uint64 + if isNum && strings.HasPrefix(string(inputValue), `"`) { + inputValue = inputValue[1 : len(inputValue)-1] + } + + // Use the encoding/json for parsing other value types. + return json.Unmarshal(inputValue, target.Addr().Interface()) +} + +// jsonProperties returns parsed proto.Properties for the field and corrects JSONName attribute. +func jsonProperties(f reflect.StructField, origName bool) *proto.Properties { + var prop proto.Properties + prop.Init(f.Type, f.Name, f.Tag.Get("protobuf"), &f) + if origName || prop.JSONName == "" { + prop.JSONName = prop.OrigName + } + return &prop +} + +type fieldNames struct { + orig, camel string +} + +func acceptedJSONFieldNames(prop *proto.Properties) fieldNames { + opts := fieldNames{orig: prop.OrigName, camel: prop.OrigName} + if prop.JSONName != "" { + opts.camel = prop.JSONName + } + return opts +} + +// Writer wrapper inspired by https://blog.golang.org/errors-are-values +type errWriter struct { + writer io.Writer + err error +} + +func (w *errWriter) write(str string) { + if w.err != nil { + return + } + _, w.err = w.writer.Write([]byte(str)) +} + +// Map fields may have key types of non-float scalars, strings and enums. +// The easiest way to sort them in some deterministic order is to use fmt. +// If this turns out to be inefficient we can always consider other options, +// such as doing a Schwartzian transform. +// +// Numeric keys are sorted in numeric order per +// https://developers.google.com/protocol-buffers/docs/proto#maps. +type mapKeys []reflect.Value + +func (s mapKeys) Len() int { return len(s) } +func (s mapKeys) Swap(i, j int) { s[i], s[j] = s[j], s[i] } +func (s mapKeys) Less(i, j int) bool { + if k := s[i].Kind(); k == s[j].Kind() { + switch k { + case reflect.Int32, reflect.Int64: + return s[i].Int() < s[j].Int() + case reflect.Uint32, reflect.Uint64: + return s[i].Uint() < s[j].Uint() + } + } + return fmt.Sprint(s[i].Interface()) < fmt.Sprint(s[j].Interface()) +} diff --git a/vendor/github.com/golang/protobuf/protoc-gen-go/descriptor/descriptor.pb.go b/vendor/github.com/golang/protobuf/protoc-gen-go/descriptor/descriptor.pb.go new file mode 100644 index 0000000..a1d8a76 --- /dev/null +++ b/vendor/github.com/golang/protobuf/protoc-gen-go/descriptor/descriptor.pb.go @@ -0,0 +1,2065 @@ +// Code generated by protoc-gen-go. +// source: google/protobuf/descriptor.proto +// DO NOT EDIT! + +/* +Package descriptor is a generated protocol buffer package. + +It is generated from these files: + google/protobuf/descriptor.proto + +It has these top-level messages: + FileDescriptorSet + FileDescriptorProto + DescriptorProto + FieldDescriptorProto + OneofDescriptorProto + EnumDescriptorProto + EnumValueDescriptorProto + ServiceDescriptorProto + MethodDescriptorProto + FileOptions + MessageOptions + FieldOptions + OneofOptions + EnumOptions + EnumValueOptions + ServiceOptions + MethodOptions + UninterpretedOption + SourceCodeInfo + GeneratedCodeInfo +*/ +package descriptor + +import proto "github.com/golang/protobuf/proto" +import fmt "fmt" +import math "math" + +// Reference imports to suppress errors if they are not otherwise used. +var _ = proto.Marshal +var _ = fmt.Errorf +var _ = math.Inf + +// This is a compile-time assertion to ensure that this generated file +// is compatible with the proto package it is being compiled against. +// A compilation error at this line likely means your copy of the +// proto package needs to be updated. +const _ = proto.ProtoPackageIsVersion2 // please upgrade the proto package + +type FieldDescriptorProto_Type int32 + +const ( + // 0 is reserved for errors. + // Order is weird for historical reasons. + FieldDescriptorProto_TYPE_DOUBLE FieldDescriptorProto_Type = 1 + FieldDescriptorProto_TYPE_FLOAT FieldDescriptorProto_Type = 2 + // Not ZigZag encoded. Negative numbers take 10 bytes. Use TYPE_SINT64 if + // negative values are likely. + FieldDescriptorProto_TYPE_INT64 FieldDescriptorProto_Type = 3 + FieldDescriptorProto_TYPE_UINT64 FieldDescriptorProto_Type = 4 + // Not ZigZag encoded. Negative numbers take 10 bytes. Use TYPE_SINT32 if + // negative values are likely. + FieldDescriptorProto_TYPE_INT32 FieldDescriptorProto_Type = 5 + FieldDescriptorProto_TYPE_FIXED64 FieldDescriptorProto_Type = 6 + FieldDescriptorProto_TYPE_FIXED32 FieldDescriptorProto_Type = 7 + FieldDescriptorProto_TYPE_BOOL FieldDescriptorProto_Type = 8 + FieldDescriptorProto_TYPE_STRING FieldDescriptorProto_Type = 9 + FieldDescriptorProto_TYPE_GROUP FieldDescriptorProto_Type = 10 + FieldDescriptorProto_TYPE_MESSAGE FieldDescriptorProto_Type = 11 + // New in version 2. + FieldDescriptorProto_TYPE_BYTES FieldDescriptorProto_Type = 12 + FieldDescriptorProto_TYPE_UINT32 FieldDescriptorProto_Type = 13 + FieldDescriptorProto_TYPE_ENUM FieldDescriptorProto_Type = 14 + FieldDescriptorProto_TYPE_SFIXED32 FieldDescriptorProto_Type = 15 + FieldDescriptorProto_TYPE_SFIXED64 FieldDescriptorProto_Type = 16 + FieldDescriptorProto_TYPE_SINT32 FieldDescriptorProto_Type = 17 + FieldDescriptorProto_TYPE_SINT64 FieldDescriptorProto_Type = 18 +) + +var FieldDescriptorProto_Type_name = map[int32]string{ + 1: "TYPE_DOUBLE", + 2: "TYPE_FLOAT", + 3: "TYPE_INT64", + 4: "TYPE_UINT64", + 5: "TYPE_INT32", + 6: "TYPE_FIXED64", + 7: "TYPE_FIXED32", + 8: "TYPE_BOOL", + 9: "TYPE_STRING", + 10: "TYPE_GROUP", + 11: "TYPE_MESSAGE", + 12: "TYPE_BYTES", + 13: "TYPE_UINT32", + 14: "TYPE_ENUM", + 15: "TYPE_SFIXED32", + 16: "TYPE_SFIXED64", + 17: "TYPE_SINT32", + 18: "TYPE_SINT64", +} +var FieldDescriptorProto_Type_value = map[string]int32{ + "TYPE_DOUBLE": 1, + "TYPE_FLOAT": 2, + "TYPE_INT64": 3, + "TYPE_UINT64": 4, + "TYPE_INT32": 5, + "TYPE_FIXED64": 6, + "TYPE_FIXED32": 7, + "TYPE_BOOL": 8, + "TYPE_STRING": 9, + "TYPE_GROUP": 10, + "TYPE_MESSAGE": 11, + "TYPE_BYTES": 12, + "TYPE_UINT32": 13, + "TYPE_ENUM": 14, + "TYPE_SFIXED32": 15, + "TYPE_SFIXED64": 16, + "TYPE_SINT32": 17, + "TYPE_SINT64": 18, +} + +func (x FieldDescriptorProto_Type) Enum() *FieldDescriptorProto_Type { + p := new(FieldDescriptorProto_Type) + *p = x + return p +} +func (x FieldDescriptorProto_Type) String() string { + return proto.EnumName(FieldDescriptorProto_Type_name, int32(x)) +} +func (x *FieldDescriptorProto_Type) UnmarshalJSON(data []byte) error { + value, err := proto.UnmarshalJSONEnum(FieldDescriptorProto_Type_value, data, "FieldDescriptorProto_Type") + if err != nil { + return err + } + *x = FieldDescriptorProto_Type(value) + return nil +} +func (FieldDescriptorProto_Type) EnumDescriptor() ([]byte, []int) { return fileDescriptor0, []int{3, 0} } + +type FieldDescriptorProto_Label int32 + +const ( + // 0 is reserved for errors + FieldDescriptorProto_LABEL_OPTIONAL FieldDescriptorProto_Label = 1 + FieldDescriptorProto_LABEL_REQUIRED FieldDescriptorProto_Label = 2 + FieldDescriptorProto_LABEL_REPEATED FieldDescriptorProto_Label = 3 +) + +var FieldDescriptorProto_Label_name = map[int32]string{ + 1: "LABEL_OPTIONAL", + 2: "LABEL_REQUIRED", + 3: "LABEL_REPEATED", +} +var FieldDescriptorProto_Label_value = map[string]int32{ + "LABEL_OPTIONAL": 1, + "LABEL_REQUIRED": 2, + "LABEL_REPEATED": 3, +} + +func (x FieldDescriptorProto_Label) Enum() *FieldDescriptorProto_Label { + p := new(FieldDescriptorProto_Label) + *p = x + return p +} +func (x FieldDescriptorProto_Label) String() string { + return proto.EnumName(FieldDescriptorProto_Label_name, int32(x)) +} +func (x *FieldDescriptorProto_Label) UnmarshalJSON(data []byte) error { + value, err := proto.UnmarshalJSONEnum(FieldDescriptorProto_Label_value, data, "FieldDescriptorProto_Label") + if err != nil { + return err + } + *x = FieldDescriptorProto_Label(value) + return nil +} +func (FieldDescriptorProto_Label) EnumDescriptor() ([]byte, []int) { + return fileDescriptor0, []int{3, 1} +} + +// Generated classes can be optimized for speed or code size. +type FileOptions_OptimizeMode int32 + +const ( + FileOptions_SPEED FileOptions_OptimizeMode = 1 + // etc. + FileOptions_CODE_SIZE FileOptions_OptimizeMode = 2 + FileOptions_LITE_RUNTIME FileOptions_OptimizeMode = 3 +) + +var FileOptions_OptimizeMode_name = map[int32]string{ + 1: "SPEED", + 2: "CODE_SIZE", + 3: "LITE_RUNTIME", +} +var FileOptions_OptimizeMode_value = map[string]int32{ + "SPEED": 1, + "CODE_SIZE": 2, + "LITE_RUNTIME": 3, +} + +func (x FileOptions_OptimizeMode) Enum() *FileOptions_OptimizeMode { + p := new(FileOptions_OptimizeMode) + *p = x + return p +} +func (x FileOptions_OptimizeMode) String() string { + return proto.EnumName(FileOptions_OptimizeMode_name, int32(x)) +} +func (x *FileOptions_OptimizeMode) UnmarshalJSON(data []byte) error { + value, err := proto.UnmarshalJSONEnum(FileOptions_OptimizeMode_value, data, "FileOptions_OptimizeMode") + if err != nil { + return err + } + *x = FileOptions_OptimizeMode(value) + return nil +} +func (FileOptions_OptimizeMode) EnumDescriptor() ([]byte, []int) { return fileDescriptor0, []int{9, 0} } + +type FieldOptions_CType int32 + +const ( + // Default mode. + FieldOptions_STRING FieldOptions_CType = 0 + FieldOptions_CORD FieldOptions_CType = 1 + FieldOptions_STRING_PIECE FieldOptions_CType = 2 +) + +var FieldOptions_CType_name = map[int32]string{ + 0: "STRING", + 1: "CORD", + 2: "STRING_PIECE", +} +var FieldOptions_CType_value = map[string]int32{ + "STRING": 0, + "CORD": 1, + "STRING_PIECE": 2, +} + +func (x FieldOptions_CType) Enum() *FieldOptions_CType { + p := new(FieldOptions_CType) + *p = x + return p +} +func (x FieldOptions_CType) String() string { + return proto.EnumName(FieldOptions_CType_name, int32(x)) +} +func (x *FieldOptions_CType) UnmarshalJSON(data []byte) error { + value, err := proto.UnmarshalJSONEnum(FieldOptions_CType_value, data, "FieldOptions_CType") + if err != nil { + return err + } + *x = FieldOptions_CType(value) + return nil +} +func (FieldOptions_CType) EnumDescriptor() ([]byte, []int) { return fileDescriptor0, []int{11, 0} } + +type FieldOptions_JSType int32 + +const ( + // Use the default type. + FieldOptions_JS_NORMAL FieldOptions_JSType = 0 + // Use JavaScript strings. + FieldOptions_JS_STRING FieldOptions_JSType = 1 + // Use JavaScript numbers. + FieldOptions_JS_NUMBER FieldOptions_JSType = 2 +) + +var FieldOptions_JSType_name = map[int32]string{ + 0: "JS_NORMAL", + 1: "JS_STRING", + 2: "JS_NUMBER", +} +var FieldOptions_JSType_value = map[string]int32{ + "JS_NORMAL": 0, + "JS_STRING": 1, + "JS_NUMBER": 2, +} + +func (x FieldOptions_JSType) Enum() *FieldOptions_JSType { + p := new(FieldOptions_JSType) + *p = x + return p +} +func (x FieldOptions_JSType) String() string { + return proto.EnumName(FieldOptions_JSType_name, int32(x)) +} +func (x *FieldOptions_JSType) UnmarshalJSON(data []byte) error { + value, err := proto.UnmarshalJSONEnum(FieldOptions_JSType_value, data, "FieldOptions_JSType") + if err != nil { + return err + } + *x = FieldOptions_JSType(value) + return nil +} +func (FieldOptions_JSType) EnumDescriptor() ([]byte, []int) { return fileDescriptor0, []int{11, 1} } + +// The protocol compiler can output a FileDescriptorSet containing the .proto +// files it parses. +type FileDescriptorSet struct { + File []*FileDescriptorProto `protobuf:"bytes,1,rep,name=file" json:"file,omitempty"` + XXX_unrecognized []byte `json:"-"` +} + +func (m *FileDescriptorSet) Reset() { *m = FileDescriptorSet{} } +func (m *FileDescriptorSet) String() string { return proto.CompactTextString(m) } +func (*FileDescriptorSet) ProtoMessage() {} +func (*FileDescriptorSet) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{0} } + +func (m *FileDescriptorSet) GetFile() []*FileDescriptorProto { + if m != nil { + return m.File + } + return nil +} + +// Describes a complete .proto file. +type FileDescriptorProto struct { + Name *string `protobuf:"bytes,1,opt,name=name" json:"name,omitempty"` + Package *string `protobuf:"bytes,2,opt,name=package" json:"package,omitempty"` + // Names of files imported by this file. + Dependency []string `protobuf:"bytes,3,rep,name=dependency" json:"dependency,omitempty"` + // Indexes of the public imported files in the dependency list above. + PublicDependency []int32 `protobuf:"varint,10,rep,name=public_dependency,json=publicDependency" json:"public_dependency,omitempty"` + // Indexes of the weak imported files in the dependency list. + // For Google-internal migration only. Do not use. + WeakDependency []int32 `protobuf:"varint,11,rep,name=weak_dependency,json=weakDependency" json:"weak_dependency,omitempty"` + // All top-level definitions in this file. + MessageType []*DescriptorProto `protobuf:"bytes,4,rep,name=message_type,json=messageType" json:"message_type,omitempty"` + EnumType []*EnumDescriptorProto `protobuf:"bytes,5,rep,name=enum_type,json=enumType" json:"enum_type,omitempty"` + Service []*ServiceDescriptorProto `protobuf:"bytes,6,rep,name=service" json:"service,omitempty"` + Extension []*FieldDescriptorProto `protobuf:"bytes,7,rep,name=extension" json:"extension,omitempty"` + Options *FileOptions `protobuf:"bytes,8,opt,name=options" json:"options,omitempty"` + // This field contains optional information about the original source code. + // You may safely remove this entire field without harming runtime + // functionality of the descriptors -- the information is needed only by + // development tools. + SourceCodeInfo *SourceCodeInfo `protobuf:"bytes,9,opt,name=source_code_info,json=sourceCodeInfo" json:"source_code_info,omitempty"` + // The syntax of the proto file. + // The supported values are "proto2" and "proto3". + Syntax *string `protobuf:"bytes,12,opt,name=syntax" json:"syntax,omitempty"` + XXX_unrecognized []byte `json:"-"` +} + +func (m *FileDescriptorProto) Reset() { *m = FileDescriptorProto{} } +func (m *FileDescriptorProto) String() string { return proto.CompactTextString(m) } +func (*FileDescriptorProto) ProtoMessage() {} +func (*FileDescriptorProto) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{1} } + +func (m *FileDescriptorProto) GetName() string { + if m != nil && m.Name != nil { + return *m.Name + } + return "" +} + +func (m *FileDescriptorProto) GetPackage() string { + if m != nil && m.Package != nil { + return *m.Package + } + return "" +} + +func (m *FileDescriptorProto) GetDependency() []string { + if m != nil { + return m.Dependency + } + return nil +} + +func (m *FileDescriptorProto) GetPublicDependency() []int32 { + if m != nil { + return m.PublicDependency + } + return nil +} + +func (m *FileDescriptorProto) GetWeakDependency() []int32 { + if m != nil { + return m.WeakDependency + } + return nil +} + +func (m *FileDescriptorProto) GetMessageType() []*DescriptorProto { + if m != nil { + return m.MessageType + } + return nil +} + +func (m *FileDescriptorProto) GetEnumType() []*EnumDescriptorProto { + if m != nil { + return m.EnumType + } + return nil +} + +func (m *FileDescriptorProto) GetService() []*ServiceDescriptorProto { + if m != nil { + return m.Service + } + return nil +} + +func (m *FileDescriptorProto) GetExtension() []*FieldDescriptorProto { + if m != nil { + return m.Extension + } + return nil +} + +func (m *FileDescriptorProto) GetOptions() *FileOptions { + if m != nil { + return m.Options + } + return nil +} + +func (m *FileDescriptorProto) GetSourceCodeInfo() *SourceCodeInfo { + if m != nil { + return m.SourceCodeInfo + } + return nil +} + +func (m *FileDescriptorProto) GetSyntax() string { + if m != nil && m.Syntax != nil { + return *m.Syntax + } + return "" +} + +// Describes a message type. +type DescriptorProto struct { + Name *string `protobuf:"bytes,1,opt,name=name" json:"name,omitempty"` + Field []*FieldDescriptorProto `protobuf:"bytes,2,rep,name=field" json:"field,omitempty"` + Extension []*FieldDescriptorProto `protobuf:"bytes,6,rep,name=extension" json:"extension,omitempty"` + NestedType []*DescriptorProto `protobuf:"bytes,3,rep,name=nested_type,json=nestedType" json:"nested_type,omitempty"` + EnumType []*EnumDescriptorProto `protobuf:"bytes,4,rep,name=enum_type,json=enumType" json:"enum_type,omitempty"` + ExtensionRange []*DescriptorProto_ExtensionRange `protobuf:"bytes,5,rep,name=extension_range,json=extensionRange" json:"extension_range,omitempty"` + OneofDecl []*OneofDescriptorProto `protobuf:"bytes,8,rep,name=oneof_decl,json=oneofDecl" json:"oneof_decl,omitempty"` + Options *MessageOptions `protobuf:"bytes,7,opt,name=options" json:"options,omitempty"` + ReservedRange []*DescriptorProto_ReservedRange `protobuf:"bytes,9,rep,name=reserved_range,json=reservedRange" json:"reserved_range,omitempty"` + // Reserved field names, which may not be used by fields in the same message. + // A given name may only be reserved once. + ReservedName []string `protobuf:"bytes,10,rep,name=reserved_name,json=reservedName" json:"reserved_name,omitempty"` + XXX_unrecognized []byte `json:"-"` +} + +func (m *DescriptorProto) Reset() { *m = DescriptorProto{} } +func (m *DescriptorProto) String() string { return proto.CompactTextString(m) } +func (*DescriptorProto) ProtoMessage() {} +func (*DescriptorProto) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{2} } + +func (m *DescriptorProto) GetName() string { + if m != nil && m.Name != nil { + return *m.Name + } + return "" +} + +func (m *DescriptorProto) GetField() []*FieldDescriptorProto { + if m != nil { + return m.Field + } + return nil +} + +func (m *DescriptorProto) GetExtension() []*FieldDescriptorProto { + if m != nil { + return m.Extension + } + return nil +} + +func (m *DescriptorProto) GetNestedType() []*DescriptorProto { + if m != nil { + return m.NestedType + } + return nil +} + +func (m *DescriptorProto) GetEnumType() []*EnumDescriptorProto { + if m != nil { + return m.EnumType + } + return nil +} + +func (m *DescriptorProto) GetExtensionRange() []*DescriptorProto_ExtensionRange { + if m != nil { + return m.ExtensionRange + } + return nil +} + +func (m *DescriptorProto) GetOneofDecl() []*OneofDescriptorProto { + if m != nil { + return m.OneofDecl + } + return nil +} + +func (m *DescriptorProto) GetOptions() *MessageOptions { + if m != nil { + return m.Options + } + return nil +} + +func (m *DescriptorProto) GetReservedRange() []*DescriptorProto_ReservedRange { + if m != nil { + return m.ReservedRange + } + return nil +} + +func (m *DescriptorProto) GetReservedName() []string { + if m != nil { + return m.ReservedName + } + return nil +} + +type DescriptorProto_ExtensionRange struct { + Start *int32 `protobuf:"varint,1,opt,name=start" json:"start,omitempty"` + End *int32 `protobuf:"varint,2,opt,name=end" json:"end,omitempty"` + XXX_unrecognized []byte `json:"-"` +} + +func (m *DescriptorProto_ExtensionRange) Reset() { *m = DescriptorProto_ExtensionRange{} } +func (m *DescriptorProto_ExtensionRange) String() string { return proto.CompactTextString(m) } +func (*DescriptorProto_ExtensionRange) ProtoMessage() {} +func (*DescriptorProto_ExtensionRange) Descriptor() ([]byte, []int) { + return fileDescriptor0, []int{2, 0} +} + +func (m *DescriptorProto_ExtensionRange) GetStart() int32 { + if m != nil && m.Start != nil { + return *m.Start + } + return 0 +} + +func (m *DescriptorProto_ExtensionRange) GetEnd() int32 { + if m != nil && m.End != nil { + return *m.End + } + return 0 +} + +// Range of reserved tag numbers. Reserved tag numbers may not be used by +// fields or extension ranges in the same message. Reserved ranges may +// not overlap. +type DescriptorProto_ReservedRange struct { + Start *int32 `protobuf:"varint,1,opt,name=start" json:"start,omitempty"` + End *int32 `protobuf:"varint,2,opt,name=end" json:"end,omitempty"` + XXX_unrecognized []byte `json:"-"` +} + +func (m *DescriptorProto_ReservedRange) Reset() { *m = DescriptorProto_ReservedRange{} } +func (m *DescriptorProto_ReservedRange) String() string { return proto.CompactTextString(m) } +func (*DescriptorProto_ReservedRange) ProtoMessage() {} +func (*DescriptorProto_ReservedRange) Descriptor() ([]byte, []int) { + return fileDescriptor0, []int{2, 1} +} + +func (m *DescriptorProto_ReservedRange) GetStart() int32 { + if m != nil && m.Start != nil { + return *m.Start + } + return 0 +} + +func (m *DescriptorProto_ReservedRange) GetEnd() int32 { + if m != nil && m.End != nil { + return *m.End + } + return 0 +} + +// Describes a field within a message. +type FieldDescriptorProto struct { + Name *string `protobuf:"bytes,1,opt,name=name" json:"name,omitempty"` + Number *int32 `protobuf:"varint,3,opt,name=number" json:"number,omitempty"` + Label *FieldDescriptorProto_Label `protobuf:"varint,4,opt,name=label,enum=google.protobuf.FieldDescriptorProto_Label" json:"label,omitempty"` + // If type_name is set, this need not be set. If both this and type_name + // are set, this must be one of TYPE_ENUM, TYPE_MESSAGE or TYPE_GROUP. + Type *FieldDescriptorProto_Type `protobuf:"varint,5,opt,name=type,enum=google.protobuf.FieldDescriptorProto_Type" json:"type,omitempty"` + // For message and enum types, this is the name of the type. If the name + // starts with a '.', it is fully-qualified. Otherwise, C++-like scoping + // rules are used to find the type (i.e. first the nested types within this + // message are searched, then within the parent, on up to the root + // namespace). + TypeName *string `protobuf:"bytes,6,opt,name=type_name,json=typeName" json:"type_name,omitempty"` + // For extensions, this is the name of the type being extended. It is + // resolved in the same manner as type_name. + Extendee *string `protobuf:"bytes,2,opt,name=extendee" json:"extendee,omitempty"` + // For numeric types, contains the original text representation of the value. + // For booleans, "true" or "false". + // For strings, contains the default text contents (not escaped in any way). + // For bytes, contains the C escaped value. All bytes >= 128 are escaped. + // TODO(kenton): Base-64 encode? + DefaultValue *string `protobuf:"bytes,7,opt,name=default_value,json=defaultValue" json:"default_value,omitempty"` + // If set, gives the index of a oneof in the containing type's oneof_decl + // list. This field is a member of that oneof. + OneofIndex *int32 `protobuf:"varint,9,opt,name=oneof_index,json=oneofIndex" json:"oneof_index,omitempty"` + // JSON name of this field. The value is set by protocol compiler. If the + // user has set a "json_name" option on this field, that option's value + // will be used. Otherwise, it's deduced from the field's name by converting + // it to camelCase. + JsonName *string `protobuf:"bytes,10,opt,name=json_name,json=jsonName" json:"json_name,omitempty"` + Options *FieldOptions `protobuf:"bytes,8,opt,name=options" json:"options,omitempty"` + XXX_unrecognized []byte `json:"-"` +} + +func (m *FieldDescriptorProto) Reset() { *m = FieldDescriptorProto{} } +func (m *FieldDescriptorProto) String() string { return proto.CompactTextString(m) } +func (*FieldDescriptorProto) ProtoMessage() {} +func (*FieldDescriptorProto) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{3} } + +func (m *FieldDescriptorProto) GetName() string { + if m != nil && m.Name != nil { + return *m.Name + } + return "" +} + +func (m *FieldDescriptorProto) GetNumber() int32 { + if m != nil && m.Number != nil { + return *m.Number + } + return 0 +} + +func (m *FieldDescriptorProto) GetLabel() FieldDescriptorProto_Label { + if m != nil && m.Label != nil { + return *m.Label + } + return FieldDescriptorProto_LABEL_OPTIONAL +} + +func (m *FieldDescriptorProto) GetType() FieldDescriptorProto_Type { + if m != nil && m.Type != nil { + return *m.Type + } + return FieldDescriptorProto_TYPE_DOUBLE +} + +func (m *FieldDescriptorProto) GetTypeName() string { + if m != nil && m.TypeName != nil { + return *m.TypeName + } + return "" +} + +func (m *FieldDescriptorProto) GetExtendee() string { + if m != nil && m.Extendee != nil { + return *m.Extendee + } + return "" +} + +func (m *FieldDescriptorProto) GetDefaultValue() string { + if m != nil && m.DefaultValue != nil { + return *m.DefaultValue + } + return "" +} + +func (m *FieldDescriptorProto) GetOneofIndex() int32 { + if m != nil && m.OneofIndex != nil { + return *m.OneofIndex + } + return 0 +} + +func (m *FieldDescriptorProto) GetJsonName() string { + if m != nil && m.JsonName != nil { + return *m.JsonName + } + return "" +} + +func (m *FieldDescriptorProto) GetOptions() *FieldOptions { + if m != nil { + return m.Options + } + return nil +} + +// Describes a oneof. +type OneofDescriptorProto struct { + Name *string `protobuf:"bytes,1,opt,name=name" json:"name,omitempty"` + Options *OneofOptions `protobuf:"bytes,2,opt,name=options" json:"options,omitempty"` + XXX_unrecognized []byte `json:"-"` +} + +func (m *OneofDescriptorProto) Reset() { *m = OneofDescriptorProto{} } +func (m *OneofDescriptorProto) String() string { return proto.CompactTextString(m) } +func (*OneofDescriptorProto) ProtoMessage() {} +func (*OneofDescriptorProto) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{4} } + +func (m *OneofDescriptorProto) GetName() string { + if m != nil && m.Name != nil { + return *m.Name + } + return "" +} + +func (m *OneofDescriptorProto) GetOptions() *OneofOptions { + if m != nil { + return m.Options + } + return nil +} + +// Describes an enum type. +type EnumDescriptorProto struct { + Name *string `protobuf:"bytes,1,opt,name=name" json:"name,omitempty"` + Value []*EnumValueDescriptorProto `protobuf:"bytes,2,rep,name=value" json:"value,omitempty"` + Options *EnumOptions `protobuf:"bytes,3,opt,name=options" json:"options,omitempty"` + XXX_unrecognized []byte `json:"-"` +} + +func (m *EnumDescriptorProto) Reset() { *m = EnumDescriptorProto{} } +func (m *EnumDescriptorProto) String() string { return proto.CompactTextString(m) } +func (*EnumDescriptorProto) ProtoMessage() {} +func (*EnumDescriptorProto) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{5} } + +func (m *EnumDescriptorProto) GetName() string { + if m != nil && m.Name != nil { + return *m.Name + } + return "" +} + +func (m *EnumDescriptorProto) GetValue() []*EnumValueDescriptorProto { + if m != nil { + return m.Value + } + return nil +} + +func (m *EnumDescriptorProto) GetOptions() *EnumOptions { + if m != nil { + return m.Options + } + return nil +} + +// Describes a value within an enum. +type EnumValueDescriptorProto struct { + Name *string `protobuf:"bytes,1,opt,name=name" json:"name,omitempty"` + Number *int32 `protobuf:"varint,2,opt,name=number" json:"number,omitempty"` + Options *EnumValueOptions `protobuf:"bytes,3,opt,name=options" json:"options,omitempty"` + XXX_unrecognized []byte `json:"-"` +} + +func (m *EnumValueDescriptorProto) Reset() { *m = EnumValueDescriptorProto{} } +func (m *EnumValueDescriptorProto) String() string { return proto.CompactTextString(m) } +func (*EnumValueDescriptorProto) ProtoMessage() {} +func (*EnumValueDescriptorProto) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{6} } + +func (m *EnumValueDescriptorProto) GetName() string { + if m != nil && m.Name != nil { + return *m.Name + } + return "" +} + +func (m *EnumValueDescriptorProto) GetNumber() int32 { + if m != nil && m.Number != nil { + return *m.Number + } + return 0 +} + +func (m *EnumValueDescriptorProto) GetOptions() *EnumValueOptions { + if m != nil { + return m.Options + } + return nil +} + +// Describes a service. +type ServiceDescriptorProto struct { + Name *string `protobuf:"bytes,1,opt,name=name" json:"name,omitempty"` + Method []*MethodDescriptorProto `protobuf:"bytes,2,rep,name=method" json:"method,omitempty"` + Options *ServiceOptions `protobuf:"bytes,3,opt,name=options" json:"options,omitempty"` + XXX_unrecognized []byte `json:"-"` +} + +func (m *ServiceDescriptorProto) Reset() { *m = ServiceDescriptorProto{} } +func (m *ServiceDescriptorProto) String() string { return proto.CompactTextString(m) } +func (*ServiceDescriptorProto) ProtoMessage() {} +func (*ServiceDescriptorProto) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{7} } + +func (m *ServiceDescriptorProto) GetName() string { + if m != nil && m.Name != nil { + return *m.Name + } + return "" +} + +func (m *ServiceDescriptorProto) GetMethod() []*MethodDescriptorProto { + if m != nil { + return m.Method + } + return nil +} + +func (m *ServiceDescriptorProto) GetOptions() *ServiceOptions { + if m != nil { + return m.Options + } + return nil +} + +// Describes a method of a service. +type MethodDescriptorProto struct { + Name *string `protobuf:"bytes,1,opt,name=name" json:"name,omitempty"` + // Input and output type names. These are resolved in the same way as + // FieldDescriptorProto.type_name, but must refer to a message type. + InputType *string `protobuf:"bytes,2,opt,name=input_type,json=inputType" json:"input_type,omitempty"` + OutputType *string `protobuf:"bytes,3,opt,name=output_type,json=outputType" json:"output_type,omitempty"` + Options *MethodOptions `protobuf:"bytes,4,opt,name=options" json:"options,omitempty"` + // Identifies if client streams multiple client messages + ClientStreaming *bool `protobuf:"varint,5,opt,name=client_streaming,json=clientStreaming,def=0" json:"client_streaming,omitempty"` + // Identifies if server streams multiple server messages + ServerStreaming *bool `protobuf:"varint,6,opt,name=server_streaming,json=serverStreaming,def=0" json:"server_streaming,omitempty"` + XXX_unrecognized []byte `json:"-"` +} + +func (m *MethodDescriptorProto) Reset() { *m = MethodDescriptorProto{} } +func (m *MethodDescriptorProto) String() string { return proto.CompactTextString(m) } +func (*MethodDescriptorProto) ProtoMessage() {} +func (*MethodDescriptorProto) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{8} } + +const Default_MethodDescriptorProto_ClientStreaming bool = false +const Default_MethodDescriptorProto_ServerStreaming bool = false + +func (m *MethodDescriptorProto) GetName() string { + if m != nil && m.Name != nil { + return *m.Name + } + return "" +} + +func (m *MethodDescriptorProto) GetInputType() string { + if m != nil && m.InputType != nil { + return *m.InputType + } + return "" +} + +func (m *MethodDescriptorProto) GetOutputType() string { + if m != nil && m.OutputType != nil { + return *m.OutputType + } + return "" +} + +func (m *MethodDescriptorProto) GetOptions() *MethodOptions { + if m != nil { + return m.Options + } + return nil +} + +func (m *MethodDescriptorProto) GetClientStreaming() bool { + if m != nil && m.ClientStreaming != nil { + return *m.ClientStreaming + } + return Default_MethodDescriptorProto_ClientStreaming +} + +func (m *MethodDescriptorProto) GetServerStreaming() bool { + if m != nil && m.ServerStreaming != nil { + return *m.ServerStreaming + } + return Default_MethodDescriptorProto_ServerStreaming +} + +type FileOptions struct { + // Sets the Java package where classes generated from this .proto will be + // placed. By default, the proto package is used, but this is often + // inappropriate because proto packages do not normally start with backwards + // domain names. + JavaPackage *string `protobuf:"bytes,1,opt,name=java_package,json=javaPackage" json:"java_package,omitempty"` + // If set, all the classes from the .proto file are wrapped in a single + // outer class with the given name. This applies to both Proto1 + // (equivalent to the old "--one_java_file" option) and Proto2 (where + // a .proto always translates to a single class, but you may want to + // explicitly choose the class name). + JavaOuterClassname *string `protobuf:"bytes,8,opt,name=java_outer_classname,json=javaOuterClassname" json:"java_outer_classname,omitempty"` + // If set true, then the Java code generator will generate a separate .java + // file for each top-level message, enum, and service defined in the .proto + // file. Thus, these types will *not* be nested inside the outer class + // named by java_outer_classname. However, the outer class will still be + // generated to contain the file's getDescriptor() method as well as any + // top-level extensions defined in the file. + JavaMultipleFiles *bool `protobuf:"varint,10,opt,name=java_multiple_files,json=javaMultipleFiles,def=0" json:"java_multiple_files,omitempty"` + // This option does nothing. + JavaGenerateEqualsAndHash *bool `protobuf:"varint,20,opt,name=java_generate_equals_and_hash,json=javaGenerateEqualsAndHash" json:"java_generate_equals_and_hash,omitempty"` + // If set true, then the Java2 code generator will generate code that + // throws an exception whenever an attempt is made to assign a non-UTF-8 + // byte sequence to a string field. + // Message reflection will do the same. + // However, an extension field still accepts non-UTF-8 byte sequences. + // This option has no effect on when used with the lite runtime. + JavaStringCheckUtf8 *bool `protobuf:"varint,27,opt,name=java_string_check_utf8,json=javaStringCheckUtf8,def=0" json:"java_string_check_utf8,omitempty"` + OptimizeFor *FileOptions_OptimizeMode `protobuf:"varint,9,opt,name=optimize_for,json=optimizeFor,enum=google.protobuf.FileOptions_OptimizeMode,def=1" json:"optimize_for,omitempty"` + // Sets the Go package where structs generated from this .proto will be + // placed. If omitted, the Go package will be derived from the following: + // - The basename of the package import path, if provided. + // - Otherwise, the package statement in the .proto file, if present. + // - Otherwise, the basename of the .proto file, without extension. + GoPackage *string `protobuf:"bytes,11,opt,name=go_package,json=goPackage" json:"go_package,omitempty"` + // Should generic services be generated in each language? "Generic" services + // are not specific to any particular RPC system. They are generated by the + // main code generators in each language (without additional plugins). + // Generic services were the only kind of service generation supported by + // early versions of google.protobuf. + // + // Generic services are now considered deprecated in favor of using plugins + // that generate code specific to your particular RPC system. Therefore, + // these default to false. Old code which depends on generic services should + // explicitly set them to true. + CcGenericServices *bool `protobuf:"varint,16,opt,name=cc_generic_services,json=ccGenericServices,def=0" json:"cc_generic_services,omitempty"` + JavaGenericServices *bool `protobuf:"varint,17,opt,name=java_generic_services,json=javaGenericServices,def=0" json:"java_generic_services,omitempty"` + PyGenericServices *bool `protobuf:"varint,18,opt,name=py_generic_services,json=pyGenericServices,def=0" json:"py_generic_services,omitempty"` + // Is this file deprecated? + // Depending on the target platform, this can emit Deprecated annotations + // for everything in the file, or it will be completely ignored; in the very + // least, this is a formalization for deprecating files. + Deprecated *bool `protobuf:"varint,23,opt,name=deprecated,def=0" json:"deprecated,omitempty"` + // Enables the use of arenas for the proto messages in this file. This applies + // only to generated classes for C++. + CcEnableArenas *bool `protobuf:"varint,31,opt,name=cc_enable_arenas,json=ccEnableArenas,def=0" json:"cc_enable_arenas,omitempty"` + // Sets the objective c class prefix which is prepended to all objective c + // generated classes from this .proto. There is no default. + ObjcClassPrefix *string `protobuf:"bytes,36,opt,name=objc_class_prefix,json=objcClassPrefix" json:"objc_class_prefix,omitempty"` + // Namespace for generated classes; defaults to the package. + CsharpNamespace *string `protobuf:"bytes,37,opt,name=csharp_namespace,json=csharpNamespace" json:"csharp_namespace,omitempty"` + // The parser stores options it doesn't recognize here. See above. + UninterpretedOption []*UninterpretedOption `protobuf:"bytes,999,rep,name=uninterpreted_option,json=uninterpretedOption" json:"uninterpreted_option,omitempty"` + proto.XXX_InternalExtensions `json:"-"` + XXX_unrecognized []byte `json:"-"` +} + +func (m *FileOptions) Reset() { *m = FileOptions{} } +func (m *FileOptions) String() string { return proto.CompactTextString(m) } +func (*FileOptions) ProtoMessage() {} +func (*FileOptions) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{9} } + +var extRange_FileOptions = []proto.ExtensionRange{ + {1000, 536870911}, +} + +func (*FileOptions) ExtensionRangeArray() []proto.ExtensionRange { + return extRange_FileOptions +} + +const Default_FileOptions_JavaMultipleFiles bool = false +const Default_FileOptions_JavaStringCheckUtf8 bool = false +const Default_FileOptions_OptimizeFor FileOptions_OptimizeMode = FileOptions_SPEED +const Default_FileOptions_CcGenericServices bool = false +const Default_FileOptions_JavaGenericServices bool = false +const Default_FileOptions_PyGenericServices bool = false +const Default_FileOptions_Deprecated bool = false +const Default_FileOptions_CcEnableArenas bool = false + +func (m *FileOptions) GetJavaPackage() string { + if m != nil && m.JavaPackage != nil { + return *m.JavaPackage + } + return "" +} + +func (m *FileOptions) GetJavaOuterClassname() string { + if m != nil && m.JavaOuterClassname != nil { + return *m.JavaOuterClassname + } + return "" +} + +func (m *FileOptions) GetJavaMultipleFiles() bool { + if m != nil && m.JavaMultipleFiles != nil { + return *m.JavaMultipleFiles + } + return Default_FileOptions_JavaMultipleFiles +} + +func (m *FileOptions) GetJavaGenerateEqualsAndHash() bool { + if m != nil && m.JavaGenerateEqualsAndHash != nil { + return *m.JavaGenerateEqualsAndHash + } + return false +} + +func (m *FileOptions) GetJavaStringCheckUtf8() bool { + if m != nil && m.JavaStringCheckUtf8 != nil { + return *m.JavaStringCheckUtf8 + } + return Default_FileOptions_JavaStringCheckUtf8 +} + +func (m *FileOptions) GetOptimizeFor() FileOptions_OptimizeMode { + if m != nil && m.OptimizeFor != nil { + return *m.OptimizeFor + } + return Default_FileOptions_OptimizeFor +} + +func (m *FileOptions) GetGoPackage() string { + if m != nil && m.GoPackage != nil { + return *m.GoPackage + } + return "" +} + +func (m *FileOptions) GetCcGenericServices() bool { + if m != nil && m.CcGenericServices != nil { + return *m.CcGenericServices + } + return Default_FileOptions_CcGenericServices +} + +func (m *FileOptions) GetJavaGenericServices() bool { + if m != nil && m.JavaGenericServices != nil { + return *m.JavaGenericServices + } + return Default_FileOptions_JavaGenericServices +} + +func (m *FileOptions) GetPyGenericServices() bool { + if m != nil && m.PyGenericServices != nil { + return *m.PyGenericServices + } + return Default_FileOptions_PyGenericServices +} + +func (m *FileOptions) GetDeprecated() bool { + if m != nil && m.Deprecated != nil { + return *m.Deprecated + } + return Default_FileOptions_Deprecated +} + +func (m *FileOptions) GetCcEnableArenas() bool { + if m != nil && m.CcEnableArenas != nil { + return *m.CcEnableArenas + } + return Default_FileOptions_CcEnableArenas +} + +func (m *FileOptions) GetObjcClassPrefix() string { + if m != nil && m.ObjcClassPrefix != nil { + return *m.ObjcClassPrefix + } + return "" +} + +func (m *FileOptions) GetCsharpNamespace() string { + if m != nil && m.CsharpNamespace != nil { + return *m.CsharpNamespace + } + return "" +} + +func (m *FileOptions) GetUninterpretedOption() []*UninterpretedOption { + if m != nil { + return m.UninterpretedOption + } + return nil +} + +type MessageOptions struct { + // Set true to use the old proto1 MessageSet wire format for extensions. + // This is provided for backwards-compatibility with the MessageSet wire + // format. You should not use this for any other reason: It's less + // efficient, has fewer features, and is more complicated. + // + // The message must be defined exactly as follows: + // message Foo { + // option message_set_wire_format = true; + // extensions 4 to max; + // } + // Note that the message cannot have any defined fields; MessageSets only + // have extensions. + // + // All extensions of your type must be singular messages; e.g. they cannot + // be int32s, enums, or repeated messages. + // + // Because this is an option, the above two restrictions are not enforced by + // the protocol compiler. + MessageSetWireFormat *bool `protobuf:"varint,1,opt,name=message_set_wire_format,json=messageSetWireFormat,def=0" json:"message_set_wire_format,omitempty"` + // Disables the generation of the standard "descriptor()" accessor, which can + // conflict with a field of the same name. This is meant to make migration + // from proto1 easier; new code should avoid fields named "descriptor". + NoStandardDescriptorAccessor *bool `protobuf:"varint,2,opt,name=no_standard_descriptor_accessor,json=noStandardDescriptorAccessor,def=0" json:"no_standard_descriptor_accessor,omitempty"` + // Is this message deprecated? + // Depending on the target platform, this can emit Deprecated annotations + // for the message, or it will be completely ignored; in the very least, + // this is a formalization for deprecating messages. + Deprecated *bool `protobuf:"varint,3,opt,name=deprecated,def=0" json:"deprecated,omitempty"` + // Whether the message is an automatically generated map entry type for the + // maps field. + // + // For maps fields: + // map map_field = 1; + // The parsed descriptor looks like: + // message MapFieldEntry { + // option map_entry = true; + // optional KeyType key = 1; + // optional ValueType value = 2; + // } + // repeated MapFieldEntry map_field = 1; + // + // Implementations may choose not to generate the map_entry=true message, but + // use a native map in the target language to hold the keys and values. + // The reflection APIs in such implementions still need to work as + // if the field is a repeated message field. + // + // NOTE: Do not set the option in .proto files. Always use the maps syntax + // instead. The option should only be implicitly set by the proto compiler + // parser. + MapEntry *bool `protobuf:"varint,7,opt,name=map_entry,json=mapEntry" json:"map_entry,omitempty"` + // The parser stores options it doesn't recognize here. See above. + UninterpretedOption []*UninterpretedOption `protobuf:"bytes,999,rep,name=uninterpreted_option,json=uninterpretedOption" json:"uninterpreted_option,omitempty"` + proto.XXX_InternalExtensions `json:"-"` + XXX_unrecognized []byte `json:"-"` +} + +func (m *MessageOptions) Reset() { *m = MessageOptions{} } +func (m *MessageOptions) String() string { return proto.CompactTextString(m) } +func (*MessageOptions) ProtoMessage() {} +func (*MessageOptions) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{10} } + +var extRange_MessageOptions = []proto.ExtensionRange{ + {1000, 536870911}, +} + +func (*MessageOptions) ExtensionRangeArray() []proto.ExtensionRange { + return extRange_MessageOptions +} + +const Default_MessageOptions_MessageSetWireFormat bool = false +const Default_MessageOptions_NoStandardDescriptorAccessor bool = false +const Default_MessageOptions_Deprecated bool = false + +func (m *MessageOptions) GetMessageSetWireFormat() bool { + if m != nil && m.MessageSetWireFormat != nil { + return *m.MessageSetWireFormat + } + return Default_MessageOptions_MessageSetWireFormat +} + +func (m *MessageOptions) GetNoStandardDescriptorAccessor() bool { + if m != nil && m.NoStandardDescriptorAccessor != nil { + return *m.NoStandardDescriptorAccessor + } + return Default_MessageOptions_NoStandardDescriptorAccessor +} + +func (m *MessageOptions) GetDeprecated() bool { + if m != nil && m.Deprecated != nil { + return *m.Deprecated + } + return Default_MessageOptions_Deprecated +} + +func (m *MessageOptions) GetMapEntry() bool { + if m != nil && m.MapEntry != nil { + return *m.MapEntry + } + return false +} + +func (m *MessageOptions) GetUninterpretedOption() []*UninterpretedOption { + if m != nil { + return m.UninterpretedOption + } + return nil +} + +type FieldOptions struct { + // The ctype option instructs the C++ code generator to use a different + // representation of the field than it normally would. See the specific + // options below. This option is not yet implemented in the open source + // release -- sorry, we'll try to include it in a future version! + Ctype *FieldOptions_CType `protobuf:"varint,1,opt,name=ctype,enum=google.protobuf.FieldOptions_CType,def=0" json:"ctype,omitempty"` + // The packed option can be enabled for repeated primitive fields to enable + // a more efficient representation on the wire. Rather than repeatedly + // writing the tag and type for each element, the entire array is encoded as + // a single length-delimited blob. In proto3, only explicit setting it to + // false will avoid using packed encoding. + Packed *bool `protobuf:"varint,2,opt,name=packed" json:"packed,omitempty"` + // The jstype option determines the JavaScript type used for values of the + // field. The option is permitted only for 64 bit integral and fixed types + // (int64, uint64, sint64, fixed64, sfixed64). By default these types are + // represented as JavaScript strings. This avoids loss of precision that can + // happen when a large value is converted to a floating point JavaScript + // numbers. Specifying JS_NUMBER for the jstype causes the generated + // JavaScript code to use the JavaScript "number" type instead of strings. + // This option is an enum to permit additional types to be added, + // e.g. goog.math.Integer. + Jstype *FieldOptions_JSType `protobuf:"varint,6,opt,name=jstype,enum=google.protobuf.FieldOptions_JSType,def=0" json:"jstype,omitempty"` + // Should this field be parsed lazily? Lazy applies only to message-type + // fields. It means that when the outer message is initially parsed, the + // inner message's contents will not be parsed but instead stored in encoded + // form. The inner message will actually be parsed when it is first accessed. + // + // This is only a hint. Implementations are free to choose whether to use + // eager or lazy parsing regardless of the value of this option. However, + // setting this option true suggests that the protocol author believes that + // using lazy parsing on this field is worth the additional bookkeeping + // overhead typically needed to implement it. + // + // This option does not affect the public interface of any generated code; + // all method signatures remain the same. Furthermore, thread-safety of the + // interface is not affected by this option; const methods remain safe to + // call from multiple threads concurrently, while non-const methods continue + // to require exclusive access. + // + // + // Note that implementations may choose not to check required fields within + // a lazy sub-message. That is, calling IsInitialized() on the outer message + // may return true even if the inner message has missing required fields. + // This is necessary because otherwise the inner message would have to be + // parsed in order to perform the check, defeating the purpose of lazy + // parsing. An implementation which chooses not to check required fields + // must be consistent about it. That is, for any particular sub-message, the + // implementation must either *always* check its required fields, or *never* + // check its required fields, regardless of whether or not the message has + // been parsed. + Lazy *bool `protobuf:"varint,5,opt,name=lazy,def=0" json:"lazy,omitempty"` + // Is this field deprecated? + // Depending on the target platform, this can emit Deprecated annotations + // for accessors, or it will be completely ignored; in the very least, this + // is a formalization for deprecating fields. + Deprecated *bool `protobuf:"varint,3,opt,name=deprecated,def=0" json:"deprecated,omitempty"` + // For Google-internal migration only. Do not use. + Weak *bool `protobuf:"varint,10,opt,name=weak,def=0" json:"weak,omitempty"` + // The parser stores options it doesn't recognize here. See above. + UninterpretedOption []*UninterpretedOption `protobuf:"bytes,999,rep,name=uninterpreted_option,json=uninterpretedOption" json:"uninterpreted_option,omitempty"` + proto.XXX_InternalExtensions `json:"-"` + XXX_unrecognized []byte `json:"-"` +} + +func (m *FieldOptions) Reset() { *m = FieldOptions{} } +func (m *FieldOptions) String() string { return proto.CompactTextString(m) } +func (*FieldOptions) ProtoMessage() {} +func (*FieldOptions) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{11} } + +var extRange_FieldOptions = []proto.ExtensionRange{ + {1000, 536870911}, +} + +func (*FieldOptions) ExtensionRangeArray() []proto.ExtensionRange { + return extRange_FieldOptions +} + +const Default_FieldOptions_Ctype FieldOptions_CType = FieldOptions_STRING +const Default_FieldOptions_Jstype FieldOptions_JSType = FieldOptions_JS_NORMAL +const Default_FieldOptions_Lazy bool = false +const Default_FieldOptions_Deprecated bool = false +const Default_FieldOptions_Weak bool = false + +func (m *FieldOptions) GetCtype() FieldOptions_CType { + if m != nil && m.Ctype != nil { + return *m.Ctype + } + return Default_FieldOptions_Ctype +} + +func (m *FieldOptions) GetPacked() bool { + if m != nil && m.Packed != nil { + return *m.Packed + } + return false +} + +func (m *FieldOptions) GetJstype() FieldOptions_JSType { + if m != nil && m.Jstype != nil { + return *m.Jstype + } + return Default_FieldOptions_Jstype +} + +func (m *FieldOptions) GetLazy() bool { + if m != nil && m.Lazy != nil { + return *m.Lazy + } + return Default_FieldOptions_Lazy +} + +func (m *FieldOptions) GetDeprecated() bool { + if m != nil && m.Deprecated != nil { + return *m.Deprecated + } + return Default_FieldOptions_Deprecated +} + +func (m *FieldOptions) GetWeak() bool { + if m != nil && m.Weak != nil { + return *m.Weak + } + return Default_FieldOptions_Weak +} + +func (m *FieldOptions) GetUninterpretedOption() []*UninterpretedOption { + if m != nil { + return m.UninterpretedOption + } + return nil +} + +type OneofOptions struct { + // The parser stores options it doesn't recognize here. See above. + UninterpretedOption []*UninterpretedOption `protobuf:"bytes,999,rep,name=uninterpreted_option,json=uninterpretedOption" json:"uninterpreted_option,omitempty"` + proto.XXX_InternalExtensions `json:"-"` + XXX_unrecognized []byte `json:"-"` +} + +func (m *OneofOptions) Reset() { *m = OneofOptions{} } +func (m *OneofOptions) String() string { return proto.CompactTextString(m) } +func (*OneofOptions) ProtoMessage() {} +func (*OneofOptions) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{12} } + +var extRange_OneofOptions = []proto.ExtensionRange{ + {1000, 536870911}, +} + +func (*OneofOptions) ExtensionRangeArray() []proto.ExtensionRange { + return extRange_OneofOptions +} + +func (m *OneofOptions) GetUninterpretedOption() []*UninterpretedOption { + if m != nil { + return m.UninterpretedOption + } + return nil +} + +type EnumOptions struct { + // Set this option to true to allow mapping different tag names to the same + // value. + AllowAlias *bool `protobuf:"varint,2,opt,name=allow_alias,json=allowAlias" json:"allow_alias,omitempty"` + // Is this enum deprecated? + // Depending on the target platform, this can emit Deprecated annotations + // for the enum, or it will be completely ignored; in the very least, this + // is a formalization for deprecating enums. + Deprecated *bool `protobuf:"varint,3,opt,name=deprecated,def=0" json:"deprecated,omitempty"` + // The parser stores options it doesn't recognize here. See above. + UninterpretedOption []*UninterpretedOption `protobuf:"bytes,999,rep,name=uninterpreted_option,json=uninterpretedOption" json:"uninterpreted_option,omitempty"` + proto.XXX_InternalExtensions `json:"-"` + XXX_unrecognized []byte `json:"-"` +} + +func (m *EnumOptions) Reset() { *m = EnumOptions{} } +func (m *EnumOptions) String() string { return proto.CompactTextString(m) } +func (*EnumOptions) ProtoMessage() {} +func (*EnumOptions) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{13} } + +var extRange_EnumOptions = []proto.ExtensionRange{ + {1000, 536870911}, +} + +func (*EnumOptions) ExtensionRangeArray() []proto.ExtensionRange { + return extRange_EnumOptions +} + +const Default_EnumOptions_Deprecated bool = false + +func (m *EnumOptions) GetAllowAlias() bool { + if m != nil && m.AllowAlias != nil { + return *m.AllowAlias + } + return false +} + +func (m *EnumOptions) GetDeprecated() bool { + if m != nil && m.Deprecated != nil { + return *m.Deprecated + } + return Default_EnumOptions_Deprecated +} + +func (m *EnumOptions) GetUninterpretedOption() []*UninterpretedOption { + if m != nil { + return m.UninterpretedOption + } + return nil +} + +type EnumValueOptions struct { + // Is this enum value deprecated? + // Depending on the target platform, this can emit Deprecated annotations + // for the enum value, or it will be completely ignored; in the very least, + // this is a formalization for deprecating enum values. + Deprecated *bool `protobuf:"varint,1,opt,name=deprecated,def=0" json:"deprecated,omitempty"` + // The parser stores options it doesn't recognize here. See above. + UninterpretedOption []*UninterpretedOption `protobuf:"bytes,999,rep,name=uninterpreted_option,json=uninterpretedOption" json:"uninterpreted_option,omitempty"` + proto.XXX_InternalExtensions `json:"-"` + XXX_unrecognized []byte `json:"-"` +} + +func (m *EnumValueOptions) Reset() { *m = EnumValueOptions{} } +func (m *EnumValueOptions) String() string { return proto.CompactTextString(m) } +func (*EnumValueOptions) ProtoMessage() {} +func (*EnumValueOptions) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{14} } + +var extRange_EnumValueOptions = []proto.ExtensionRange{ + {1000, 536870911}, +} + +func (*EnumValueOptions) ExtensionRangeArray() []proto.ExtensionRange { + return extRange_EnumValueOptions +} + +const Default_EnumValueOptions_Deprecated bool = false + +func (m *EnumValueOptions) GetDeprecated() bool { + if m != nil && m.Deprecated != nil { + return *m.Deprecated + } + return Default_EnumValueOptions_Deprecated +} + +func (m *EnumValueOptions) GetUninterpretedOption() []*UninterpretedOption { + if m != nil { + return m.UninterpretedOption + } + return nil +} + +type ServiceOptions struct { + // Is this service deprecated? + // Depending on the target platform, this can emit Deprecated annotations + // for the service, or it will be completely ignored; in the very least, + // this is a formalization for deprecating services. + Deprecated *bool `protobuf:"varint,33,opt,name=deprecated,def=0" json:"deprecated,omitempty"` + // The parser stores options it doesn't recognize here. See above. + UninterpretedOption []*UninterpretedOption `protobuf:"bytes,999,rep,name=uninterpreted_option,json=uninterpretedOption" json:"uninterpreted_option,omitempty"` + proto.XXX_InternalExtensions `json:"-"` + XXX_unrecognized []byte `json:"-"` +} + +func (m *ServiceOptions) Reset() { *m = ServiceOptions{} } +func (m *ServiceOptions) String() string { return proto.CompactTextString(m) } +func (*ServiceOptions) ProtoMessage() {} +func (*ServiceOptions) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{15} } + +var extRange_ServiceOptions = []proto.ExtensionRange{ + {1000, 536870911}, +} + +func (*ServiceOptions) ExtensionRangeArray() []proto.ExtensionRange { + return extRange_ServiceOptions +} + +const Default_ServiceOptions_Deprecated bool = false + +func (m *ServiceOptions) GetDeprecated() bool { + if m != nil && m.Deprecated != nil { + return *m.Deprecated + } + return Default_ServiceOptions_Deprecated +} + +func (m *ServiceOptions) GetUninterpretedOption() []*UninterpretedOption { + if m != nil { + return m.UninterpretedOption + } + return nil +} + +type MethodOptions struct { + // Is this method deprecated? + // Depending on the target platform, this can emit Deprecated annotations + // for the method, or it will be completely ignored; in the very least, + // this is a formalization for deprecating methods. + Deprecated *bool `protobuf:"varint,33,opt,name=deprecated,def=0" json:"deprecated,omitempty"` + // The parser stores options it doesn't recognize here. See above. + UninterpretedOption []*UninterpretedOption `protobuf:"bytes,999,rep,name=uninterpreted_option,json=uninterpretedOption" json:"uninterpreted_option,omitempty"` + proto.XXX_InternalExtensions `json:"-"` + XXX_unrecognized []byte `json:"-"` +} + +func (m *MethodOptions) Reset() { *m = MethodOptions{} } +func (m *MethodOptions) String() string { return proto.CompactTextString(m) } +func (*MethodOptions) ProtoMessage() {} +func (*MethodOptions) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{16} } + +var extRange_MethodOptions = []proto.ExtensionRange{ + {1000, 536870911}, +} + +func (*MethodOptions) ExtensionRangeArray() []proto.ExtensionRange { + return extRange_MethodOptions +} + +const Default_MethodOptions_Deprecated bool = false + +func (m *MethodOptions) GetDeprecated() bool { + if m != nil && m.Deprecated != nil { + return *m.Deprecated + } + return Default_MethodOptions_Deprecated +} + +func (m *MethodOptions) GetUninterpretedOption() []*UninterpretedOption { + if m != nil { + return m.UninterpretedOption + } + return nil +} + +// A message representing a option the parser does not recognize. This only +// appears in options protos created by the compiler::Parser class. +// DescriptorPool resolves these when building Descriptor objects. Therefore, +// options protos in descriptor objects (e.g. returned by Descriptor::options(), +// or produced by Descriptor::CopyTo()) will never have UninterpretedOptions +// in them. +type UninterpretedOption struct { + Name []*UninterpretedOption_NamePart `protobuf:"bytes,2,rep,name=name" json:"name,omitempty"` + // The value of the uninterpreted option, in whatever type the tokenizer + // identified it as during parsing. Exactly one of these should be set. + IdentifierValue *string `protobuf:"bytes,3,opt,name=identifier_value,json=identifierValue" json:"identifier_value,omitempty"` + PositiveIntValue *uint64 `protobuf:"varint,4,opt,name=positive_int_value,json=positiveIntValue" json:"positive_int_value,omitempty"` + NegativeIntValue *int64 `protobuf:"varint,5,opt,name=negative_int_value,json=negativeIntValue" json:"negative_int_value,omitempty"` + DoubleValue *float64 `protobuf:"fixed64,6,opt,name=double_value,json=doubleValue" json:"double_value,omitempty"` + StringValue []byte `protobuf:"bytes,7,opt,name=string_value,json=stringValue" json:"string_value,omitempty"` + AggregateValue *string `protobuf:"bytes,8,opt,name=aggregate_value,json=aggregateValue" json:"aggregate_value,omitempty"` + XXX_unrecognized []byte `json:"-"` +} + +func (m *UninterpretedOption) Reset() { *m = UninterpretedOption{} } +func (m *UninterpretedOption) String() string { return proto.CompactTextString(m) } +func (*UninterpretedOption) ProtoMessage() {} +func (*UninterpretedOption) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{17} } + +func (m *UninterpretedOption) GetName() []*UninterpretedOption_NamePart { + if m != nil { + return m.Name + } + return nil +} + +func (m *UninterpretedOption) GetIdentifierValue() string { + if m != nil && m.IdentifierValue != nil { + return *m.IdentifierValue + } + return "" +} + +func (m *UninterpretedOption) GetPositiveIntValue() uint64 { + if m != nil && m.PositiveIntValue != nil { + return *m.PositiveIntValue + } + return 0 +} + +func (m *UninterpretedOption) GetNegativeIntValue() int64 { + if m != nil && m.NegativeIntValue != nil { + return *m.NegativeIntValue + } + return 0 +} + +func (m *UninterpretedOption) GetDoubleValue() float64 { + if m != nil && m.DoubleValue != nil { + return *m.DoubleValue + } + return 0 +} + +func (m *UninterpretedOption) GetStringValue() []byte { + if m != nil { + return m.StringValue + } + return nil +} + +func (m *UninterpretedOption) GetAggregateValue() string { + if m != nil && m.AggregateValue != nil { + return *m.AggregateValue + } + return "" +} + +// The name of the uninterpreted option. Each string represents a segment in +// a dot-separated name. is_extension is true iff a segment represents an +// extension (denoted with parentheses in options specs in .proto files). +// E.g.,{ ["foo", false], ["bar.baz", true], ["qux", false] } represents +// "foo.(bar.baz).qux". +type UninterpretedOption_NamePart struct { + NamePart *string `protobuf:"bytes,1,req,name=name_part,json=namePart" json:"name_part,omitempty"` + IsExtension *bool `protobuf:"varint,2,req,name=is_extension,json=isExtension" json:"is_extension,omitempty"` + XXX_unrecognized []byte `json:"-"` +} + +func (m *UninterpretedOption_NamePart) Reset() { *m = UninterpretedOption_NamePart{} } +func (m *UninterpretedOption_NamePart) String() string { return proto.CompactTextString(m) } +func (*UninterpretedOption_NamePart) ProtoMessage() {} +func (*UninterpretedOption_NamePart) Descriptor() ([]byte, []int) { + return fileDescriptor0, []int{17, 0} +} + +func (m *UninterpretedOption_NamePart) GetNamePart() string { + if m != nil && m.NamePart != nil { + return *m.NamePart + } + return "" +} + +func (m *UninterpretedOption_NamePart) GetIsExtension() bool { + if m != nil && m.IsExtension != nil { + return *m.IsExtension + } + return false +} + +// Encapsulates information about the original source file from which a +// FileDescriptorProto was generated. +type SourceCodeInfo struct { + // A Location identifies a piece of source code in a .proto file which + // corresponds to a particular definition. This information is intended + // to be useful to IDEs, code indexers, documentation generators, and similar + // tools. + // + // For example, say we have a file like: + // message Foo { + // optional string foo = 1; + // } + // Let's look at just the field definition: + // optional string foo = 1; + // ^ ^^ ^^ ^ ^^^ + // a bc de f ghi + // We have the following locations: + // span path represents + // [a,i) [ 4, 0, 2, 0 ] The whole field definition. + // [a,b) [ 4, 0, 2, 0, 4 ] The label (optional). + // [c,d) [ 4, 0, 2, 0, 5 ] The type (string). + // [e,f) [ 4, 0, 2, 0, 1 ] The name (foo). + // [g,h) [ 4, 0, 2, 0, 3 ] The number (1). + // + // Notes: + // - A location may refer to a repeated field itself (i.e. not to any + // particular index within it). This is used whenever a set of elements are + // logically enclosed in a single code segment. For example, an entire + // extend block (possibly containing multiple extension definitions) will + // have an outer location whose path refers to the "extensions" repeated + // field without an index. + // - Multiple locations may have the same path. This happens when a single + // logical declaration is spread out across multiple places. The most + // obvious example is the "extend" block again -- there may be multiple + // extend blocks in the same scope, each of which will have the same path. + // - A location's span is not always a subset of its parent's span. For + // example, the "extendee" of an extension declaration appears at the + // beginning of the "extend" block and is shared by all extensions within + // the block. + // - Just because a location's span is a subset of some other location's span + // does not mean that it is a descendent. For example, a "group" defines + // both a type and a field in a single declaration. Thus, the locations + // corresponding to the type and field and their components will overlap. + // - Code which tries to interpret locations should probably be designed to + // ignore those that it doesn't understand, as more types of locations could + // be recorded in the future. + Location []*SourceCodeInfo_Location `protobuf:"bytes,1,rep,name=location" json:"location,omitempty"` + XXX_unrecognized []byte `json:"-"` +} + +func (m *SourceCodeInfo) Reset() { *m = SourceCodeInfo{} } +func (m *SourceCodeInfo) String() string { return proto.CompactTextString(m) } +func (*SourceCodeInfo) ProtoMessage() {} +func (*SourceCodeInfo) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{18} } + +func (m *SourceCodeInfo) GetLocation() []*SourceCodeInfo_Location { + if m != nil { + return m.Location + } + return nil +} + +type SourceCodeInfo_Location struct { + // Identifies which part of the FileDescriptorProto was defined at this + // location. + // + // Each element is a field number or an index. They form a path from + // the root FileDescriptorProto to the place where the definition. For + // example, this path: + // [ 4, 3, 2, 7, 1 ] + // refers to: + // file.message_type(3) // 4, 3 + // .field(7) // 2, 7 + // .name() // 1 + // This is because FileDescriptorProto.message_type has field number 4: + // repeated DescriptorProto message_type = 4; + // and DescriptorProto.field has field number 2: + // repeated FieldDescriptorProto field = 2; + // and FieldDescriptorProto.name has field number 1: + // optional string name = 1; + // + // Thus, the above path gives the location of a field name. If we removed + // the last element: + // [ 4, 3, 2, 7 ] + // this path refers to the whole field declaration (from the beginning + // of the label to the terminating semicolon). + Path []int32 `protobuf:"varint,1,rep,packed,name=path" json:"path,omitempty"` + // Always has exactly three or four elements: start line, start column, + // end line (optional, otherwise assumed same as start line), end column. + // These are packed into a single field for efficiency. Note that line + // and column numbers are zero-based -- typically you will want to add + // 1 to each before displaying to a user. + Span []int32 `protobuf:"varint,2,rep,packed,name=span" json:"span,omitempty"` + // If this SourceCodeInfo represents a complete declaration, these are any + // comments appearing before and after the declaration which appear to be + // attached to the declaration. + // + // A series of line comments appearing on consecutive lines, with no other + // tokens appearing on those lines, will be treated as a single comment. + // + // leading_detached_comments will keep paragraphs of comments that appear + // before (but not connected to) the current element. Each paragraph, + // separated by empty lines, will be one comment element in the repeated + // field. + // + // Only the comment content is provided; comment markers (e.g. //) are + // stripped out. For block comments, leading whitespace and an asterisk + // will be stripped from the beginning of each line other than the first. + // Newlines are included in the output. + // + // Examples: + // + // optional int32 foo = 1; // Comment attached to foo. + // // Comment attached to bar. + // optional int32 bar = 2; + // + // optional string baz = 3; + // // Comment attached to baz. + // // Another line attached to baz. + // + // // Comment attached to qux. + // // + // // Another line attached to qux. + // optional double qux = 4; + // + // // Detached comment for corge. This is not leading or trailing comments + // // to qux or corge because there are blank lines separating it from + // // both. + // + // // Detached comment for corge paragraph 2. + // + // optional string corge = 5; + // /* Block comment attached + // * to corge. Leading asterisks + // * will be removed. */ + // /* Block comment attached to + // * grault. */ + // optional int32 grault = 6; + // + // // ignored detached comments. + LeadingComments *string `protobuf:"bytes,3,opt,name=leading_comments,json=leadingComments" json:"leading_comments,omitempty"` + TrailingComments *string `protobuf:"bytes,4,opt,name=trailing_comments,json=trailingComments" json:"trailing_comments,omitempty"` + LeadingDetachedComments []string `protobuf:"bytes,6,rep,name=leading_detached_comments,json=leadingDetachedComments" json:"leading_detached_comments,omitempty"` + XXX_unrecognized []byte `json:"-"` +} + +func (m *SourceCodeInfo_Location) Reset() { *m = SourceCodeInfo_Location{} } +func (m *SourceCodeInfo_Location) String() string { return proto.CompactTextString(m) } +func (*SourceCodeInfo_Location) ProtoMessage() {} +func (*SourceCodeInfo_Location) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{18, 0} } + +func (m *SourceCodeInfo_Location) GetPath() []int32 { + if m != nil { + return m.Path + } + return nil +} + +func (m *SourceCodeInfo_Location) GetSpan() []int32 { + if m != nil { + return m.Span + } + return nil +} + +func (m *SourceCodeInfo_Location) GetLeadingComments() string { + if m != nil && m.LeadingComments != nil { + return *m.LeadingComments + } + return "" +} + +func (m *SourceCodeInfo_Location) GetTrailingComments() string { + if m != nil && m.TrailingComments != nil { + return *m.TrailingComments + } + return "" +} + +func (m *SourceCodeInfo_Location) GetLeadingDetachedComments() []string { + if m != nil { + return m.LeadingDetachedComments + } + return nil +} + +// Describes the relationship between generated code and its original source +// file. A GeneratedCodeInfo message is associated with only one generated +// source file, but may contain references to different source .proto files. +type GeneratedCodeInfo struct { + // An Annotation connects some span of text in generated code to an element + // of its generating .proto file. + Annotation []*GeneratedCodeInfo_Annotation `protobuf:"bytes,1,rep,name=annotation" json:"annotation,omitempty"` + XXX_unrecognized []byte `json:"-"` +} + +func (m *GeneratedCodeInfo) Reset() { *m = GeneratedCodeInfo{} } +func (m *GeneratedCodeInfo) String() string { return proto.CompactTextString(m) } +func (*GeneratedCodeInfo) ProtoMessage() {} +func (*GeneratedCodeInfo) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{19} } + +func (m *GeneratedCodeInfo) GetAnnotation() []*GeneratedCodeInfo_Annotation { + if m != nil { + return m.Annotation + } + return nil +} + +type GeneratedCodeInfo_Annotation struct { + // Identifies the element in the original source .proto file. This field + // is formatted the same as SourceCodeInfo.Location.path. + Path []int32 `protobuf:"varint,1,rep,packed,name=path" json:"path,omitempty"` + // Identifies the filesystem path to the original source .proto. + SourceFile *string `protobuf:"bytes,2,opt,name=source_file,json=sourceFile" json:"source_file,omitempty"` + // Identifies the starting offset in bytes in the generated code + // that relates to the identified object. + Begin *int32 `protobuf:"varint,3,opt,name=begin" json:"begin,omitempty"` + // Identifies the ending offset in bytes in the generated code that + // relates to the identified offset. The end offset should be one past + // the last relevant byte (so the length of the text = end - begin). + End *int32 `protobuf:"varint,4,opt,name=end" json:"end,omitempty"` + XXX_unrecognized []byte `json:"-"` +} + +func (m *GeneratedCodeInfo_Annotation) Reset() { *m = GeneratedCodeInfo_Annotation{} } +func (m *GeneratedCodeInfo_Annotation) String() string { return proto.CompactTextString(m) } +func (*GeneratedCodeInfo_Annotation) ProtoMessage() {} +func (*GeneratedCodeInfo_Annotation) Descriptor() ([]byte, []int) { + return fileDescriptor0, []int{19, 0} +} + +func (m *GeneratedCodeInfo_Annotation) GetPath() []int32 { + if m != nil { + return m.Path + } + return nil +} + +func (m *GeneratedCodeInfo_Annotation) GetSourceFile() string { + if m != nil && m.SourceFile != nil { + return *m.SourceFile + } + return "" +} + +func (m *GeneratedCodeInfo_Annotation) GetBegin() int32 { + if m != nil && m.Begin != nil { + return *m.Begin + } + return 0 +} + +func (m *GeneratedCodeInfo_Annotation) GetEnd() int32 { + if m != nil && m.End != nil { + return *m.End + } + return 0 +} + +func init() { + proto.RegisterType((*FileDescriptorSet)(nil), "google.protobuf.FileDescriptorSet") + proto.RegisterType((*FileDescriptorProto)(nil), "google.protobuf.FileDescriptorProto") + proto.RegisterType((*DescriptorProto)(nil), "google.protobuf.DescriptorProto") + proto.RegisterType((*DescriptorProto_ExtensionRange)(nil), "google.protobuf.DescriptorProto.ExtensionRange") + proto.RegisterType((*DescriptorProto_ReservedRange)(nil), "google.protobuf.DescriptorProto.ReservedRange") + proto.RegisterType((*FieldDescriptorProto)(nil), "google.protobuf.FieldDescriptorProto") + proto.RegisterType((*OneofDescriptorProto)(nil), "google.protobuf.OneofDescriptorProto") + proto.RegisterType((*EnumDescriptorProto)(nil), "google.protobuf.EnumDescriptorProto") + proto.RegisterType((*EnumValueDescriptorProto)(nil), "google.protobuf.EnumValueDescriptorProto") + proto.RegisterType((*ServiceDescriptorProto)(nil), "google.protobuf.ServiceDescriptorProto") + proto.RegisterType((*MethodDescriptorProto)(nil), "google.protobuf.MethodDescriptorProto") + proto.RegisterType((*FileOptions)(nil), "google.protobuf.FileOptions") + proto.RegisterType((*MessageOptions)(nil), "google.protobuf.MessageOptions") + proto.RegisterType((*FieldOptions)(nil), "google.protobuf.FieldOptions") + proto.RegisterType((*OneofOptions)(nil), "google.protobuf.OneofOptions") + proto.RegisterType((*EnumOptions)(nil), "google.protobuf.EnumOptions") + proto.RegisterType((*EnumValueOptions)(nil), "google.protobuf.EnumValueOptions") + proto.RegisterType((*ServiceOptions)(nil), "google.protobuf.ServiceOptions") + proto.RegisterType((*MethodOptions)(nil), "google.protobuf.MethodOptions") + proto.RegisterType((*UninterpretedOption)(nil), "google.protobuf.UninterpretedOption") + proto.RegisterType((*UninterpretedOption_NamePart)(nil), "google.protobuf.UninterpretedOption.NamePart") + proto.RegisterType((*SourceCodeInfo)(nil), "google.protobuf.SourceCodeInfo") + proto.RegisterType((*SourceCodeInfo_Location)(nil), "google.protobuf.SourceCodeInfo.Location") + proto.RegisterType((*GeneratedCodeInfo)(nil), "google.protobuf.GeneratedCodeInfo") + proto.RegisterType((*GeneratedCodeInfo_Annotation)(nil), "google.protobuf.GeneratedCodeInfo.Annotation") + proto.RegisterEnum("google.protobuf.FieldDescriptorProto_Type", FieldDescriptorProto_Type_name, FieldDescriptorProto_Type_value) + proto.RegisterEnum("google.protobuf.FieldDescriptorProto_Label", FieldDescriptorProto_Label_name, FieldDescriptorProto_Label_value) + proto.RegisterEnum("google.protobuf.FileOptions_OptimizeMode", FileOptions_OptimizeMode_name, FileOptions_OptimizeMode_value) + proto.RegisterEnum("google.protobuf.FieldOptions_CType", FieldOptions_CType_name, FieldOptions_CType_value) + proto.RegisterEnum("google.protobuf.FieldOptions_JSType", FieldOptions_JSType_name, FieldOptions_JSType_value) +} + +func init() { proto.RegisterFile("google/protobuf/descriptor.proto", fileDescriptor0) } + +var fileDescriptor0 = []byte{ + // 2295 bytes of a gzipped FileDescriptorProto + 0x1f, 0x8b, 0x08, 0x00, 0x00, 0x09, 0x6e, 0x88, 0x02, 0xff, 0xcc, 0x59, 0x4f, 0x6f, 0x1b, 0xc7, + 0x15, 0xcf, 0xf2, 0x9f, 0xc8, 0x47, 0x8a, 0x1a, 0x8d, 0x14, 0x67, 0xad, 0xfc, 0xb1, 0xcc, 0xd8, + 0xb1, 0x6c, 0xb7, 0x74, 0x20, 0xff, 0x89, 0xa3, 0x14, 0x29, 0x28, 0x71, 0xad, 0xd0, 0x90, 0x44, + 0x76, 0x29, 0xb5, 0x4e, 0x2e, 0x8b, 0xd1, 0xee, 0x90, 0x5a, 0x7b, 0x39, 0xbb, 0xdd, 0x5d, 0xda, + 0x56, 0x4e, 0x06, 0x7a, 0xea, 0xa5, 0xe7, 0xa2, 0x2d, 0x7a, 0xc8, 0x25, 0x40, 0x3f, 0x40, 0x0f, + 0xfd, 0x0a, 0x05, 0x0a, 0xf4, 0x2b, 0x14, 0x05, 0xda, 0x6f, 0xd0, 0x6b, 0x31, 0x33, 0xbb, 0xcb, + 0x5d, 0xfe, 0x89, 0xd5, 0x00, 0x49, 0x7a, 0x12, 0xe7, 0xf7, 0x7e, 0xef, 0xcd, 0x9b, 0x37, 0x6f, + 0xde, 0xbc, 0x1d, 0xc1, 0xe6, 0xd0, 0x75, 0x87, 0x0e, 0xbd, 0xe3, 0xf9, 0x6e, 0xe8, 0x9e, 0x8e, + 0x07, 0x77, 0x2c, 0x1a, 0x98, 0xbe, 0xed, 0x85, 0xae, 0xdf, 0x14, 0x18, 0x5e, 0x91, 0x8c, 0x66, + 0xcc, 0x68, 0x1c, 0xc2, 0xea, 0x23, 0xdb, 0xa1, 0xed, 0x84, 0xd8, 0xa7, 0x21, 0x7e, 0x08, 0x85, + 0x81, 0xed, 0x50, 0x55, 0xd9, 0xcc, 0x6f, 0x55, 0xb7, 0xaf, 0x35, 0xa7, 0x94, 0x9a, 0x59, 0x8d, + 0x1e, 0x87, 0x75, 0xa1, 0xd1, 0xf8, 0x67, 0x01, 0xd6, 0xe6, 0x48, 0x31, 0x86, 0x02, 0x23, 0x23, + 0x6e, 0x51, 0xd9, 0xaa, 0xe8, 0xe2, 0x37, 0x56, 0x61, 0xc9, 0x23, 0xe6, 0x33, 0x32, 0xa4, 0x6a, + 0x4e, 0xc0, 0xf1, 0x10, 0xbf, 0x07, 0x60, 0x51, 0x8f, 0x32, 0x8b, 0x32, 0xf3, 0x5c, 0xcd, 0x6f, + 0xe6, 0xb7, 0x2a, 0x7a, 0x0a, 0xc1, 0xb7, 0x61, 0xd5, 0x1b, 0x9f, 0x3a, 0xb6, 0x69, 0xa4, 0x68, + 0xb0, 0x99, 0xdf, 0x2a, 0xea, 0x48, 0x0a, 0xda, 0x13, 0xf2, 0x0d, 0x58, 0x79, 0x41, 0xc9, 0xb3, + 0x34, 0xb5, 0x2a, 0xa8, 0x75, 0x0e, 0xa7, 0x88, 0x7b, 0x50, 0x1b, 0xd1, 0x20, 0x20, 0x43, 0x6a, + 0x84, 0xe7, 0x1e, 0x55, 0x0b, 0x62, 0xf5, 0x9b, 0x33, 0xab, 0x9f, 0x5e, 0x79, 0x35, 0xd2, 0x3a, + 0x3e, 0xf7, 0x28, 0x6e, 0x41, 0x85, 0xb2, 0xf1, 0x48, 0x5a, 0x28, 0x2e, 0x88, 0x9f, 0xc6, 0xc6, + 0xa3, 0x69, 0x2b, 0x65, 0xae, 0x16, 0x99, 0x58, 0x0a, 0xa8, 0xff, 0xdc, 0x36, 0xa9, 0x5a, 0x12, + 0x06, 0x6e, 0xcc, 0x18, 0xe8, 0x4b, 0xf9, 0xb4, 0x8d, 0x58, 0x0f, 0xef, 0x41, 0x85, 0xbe, 0x0c, + 0x29, 0x0b, 0x6c, 0x97, 0xa9, 0x4b, 0xc2, 0xc8, 0xf5, 0x39, 0xbb, 0x48, 0x1d, 0x6b, 0xda, 0xc4, + 0x44, 0x0f, 0x3f, 0x80, 0x25, 0xd7, 0x0b, 0x6d, 0x97, 0x05, 0x6a, 0x79, 0x53, 0xd9, 0xaa, 0x6e, + 0xbf, 0x33, 0x37, 0x11, 0xba, 0x92, 0xa3, 0xc7, 0x64, 0xdc, 0x01, 0x14, 0xb8, 0x63, 0xdf, 0xa4, + 0x86, 0xe9, 0x5a, 0xd4, 0xb0, 0xd9, 0xc0, 0x55, 0x2b, 0xc2, 0xc0, 0x95, 0xd9, 0x85, 0x08, 0xe2, + 0x9e, 0x6b, 0xd1, 0x0e, 0x1b, 0xb8, 0x7a, 0x3d, 0xc8, 0x8c, 0xf1, 0x25, 0x28, 0x05, 0xe7, 0x2c, + 0x24, 0x2f, 0xd5, 0x9a, 0xc8, 0x90, 0x68, 0xd4, 0xf8, 0x4f, 0x11, 0x56, 0x2e, 0x92, 0x62, 0x9f, + 0x40, 0x71, 0xc0, 0x57, 0xa9, 0xe6, 0xfe, 0x97, 0x18, 0x48, 0x9d, 0x6c, 0x10, 0x4b, 0xdf, 0x32, + 0x88, 0x2d, 0xa8, 0x32, 0x1a, 0x84, 0xd4, 0x92, 0x19, 0x91, 0xbf, 0x60, 0x4e, 0x81, 0x54, 0x9a, + 0x4d, 0xa9, 0xc2, 0xb7, 0x4a, 0xa9, 0x27, 0xb0, 0x92, 0xb8, 0x64, 0xf8, 0x84, 0x0d, 0xe3, 0xdc, + 0xbc, 0xf3, 0x3a, 0x4f, 0x9a, 0x5a, 0xac, 0xa7, 0x73, 0x35, 0xbd, 0x4e, 0x33, 0x63, 0xdc, 0x06, + 0x70, 0x19, 0x75, 0x07, 0x86, 0x45, 0x4d, 0x47, 0x2d, 0x2f, 0x88, 0x52, 0x97, 0x53, 0x66, 0xa2, + 0xe4, 0x4a, 0xd4, 0x74, 0xf0, 0xc7, 0x93, 0x54, 0x5b, 0x5a, 0x90, 0x29, 0x87, 0xf2, 0x90, 0xcd, + 0x64, 0xdb, 0x09, 0xd4, 0x7d, 0xca, 0xf3, 0x9e, 0x5a, 0xd1, 0xca, 0x2a, 0xc2, 0x89, 0xe6, 0x6b, + 0x57, 0xa6, 0x47, 0x6a, 0x72, 0x61, 0xcb, 0x7e, 0x7a, 0x88, 0xdf, 0x87, 0x04, 0x30, 0x44, 0x5a, + 0x81, 0xa8, 0x42, 0xb5, 0x18, 0x3c, 0x22, 0x23, 0xba, 0xf1, 0x10, 0xea, 0xd9, 0xf0, 0xe0, 0x75, + 0x28, 0x06, 0x21, 0xf1, 0x43, 0x91, 0x85, 0x45, 0x5d, 0x0e, 0x30, 0x82, 0x3c, 0x65, 0x96, 0xa8, + 0x72, 0x45, 0x9d, 0xff, 0xdc, 0xf8, 0x08, 0x96, 0x33, 0xd3, 0x5f, 0x54, 0xb1, 0xf1, 0xdb, 0x12, + 0xac, 0xcf, 0xcb, 0xb9, 0xb9, 0xe9, 0x7f, 0x09, 0x4a, 0x6c, 0x3c, 0x3a, 0xa5, 0xbe, 0x9a, 0x17, + 0x16, 0xa2, 0x11, 0x6e, 0x41, 0xd1, 0x21, 0xa7, 0xd4, 0x51, 0x0b, 0x9b, 0xca, 0x56, 0x7d, 0xfb, + 0xf6, 0x85, 0xb2, 0xba, 0x79, 0xc0, 0x55, 0x74, 0xa9, 0x89, 0x3f, 0x85, 0x42, 0x54, 0xe2, 0xb8, + 0x85, 0x5b, 0x17, 0xb3, 0xc0, 0x73, 0x51, 0x17, 0x7a, 0xf8, 0x6d, 0xa8, 0xf0, 0xbf, 0x32, 0xb6, + 0x25, 0xe1, 0x73, 0x99, 0x03, 0x3c, 0xae, 0x78, 0x03, 0xca, 0x22, 0xcd, 0x2c, 0x1a, 0x5f, 0x0d, + 0xc9, 0x98, 0x6f, 0x8c, 0x45, 0x07, 0x64, 0xec, 0x84, 0xc6, 0x73, 0xe2, 0x8c, 0xa9, 0x48, 0x98, + 0x8a, 0x5e, 0x8b, 0xc0, 0x9f, 0x73, 0x0c, 0x5f, 0x81, 0xaa, 0xcc, 0x4a, 0x9b, 0x59, 0xf4, 0xa5, + 0xa8, 0x3e, 0x45, 0x5d, 0x26, 0x6a, 0x87, 0x23, 0x7c, 0xfa, 0xa7, 0x81, 0xcb, 0xe2, 0xad, 0x15, + 0x53, 0x70, 0x40, 0x4c, 0xff, 0xd1, 0x74, 0xe1, 0x7b, 0x77, 0xfe, 0xf2, 0xa6, 0x73, 0xb1, 0xf1, + 0xe7, 0x1c, 0x14, 0xc4, 0x79, 0x5b, 0x81, 0xea, 0xf1, 0xe7, 0x3d, 0xcd, 0x68, 0x77, 0x4f, 0x76, + 0x0f, 0x34, 0xa4, 0xe0, 0x3a, 0x80, 0x00, 0x1e, 0x1d, 0x74, 0x5b, 0xc7, 0x28, 0x97, 0x8c, 0x3b, + 0x47, 0xc7, 0x0f, 0xee, 0xa1, 0x7c, 0xa2, 0x70, 0x22, 0x81, 0x42, 0x9a, 0x70, 0x77, 0x1b, 0x15, + 0x31, 0x82, 0x9a, 0x34, 0xd0, 0x79, 0xa2, 0xb5, 0x1f, 0xdc, 0x43, 0xa5, 0x2c, 0x72, 0x77, 0x1b, + 0x2d, 0xe1, 0x65, 0xa8, 0x08, 0x64, 0xb7, 0xdb, 0x3d, 0x40, 0xe5, 0xc4, 0x66, 0xff, 0x58, 0xef, + 0x1c, 0xed, 0xa3, 0x4a, 0x62, 0x73, 0x5f, 0xef, 0x9e, 0xf4, 0x10, 0x24, 0x16, 0x0e, 0xb5, 0x7e, + 0xbf, 0xb5, 0xaf, 0xa1, 0x6a, 0xc2, 0xd8, 0xfd, 0xfc, 0x58, 0xeb, 0xa3, 0x5a, 0xc6, 0xad, 0xbb, + 0xdb, 0x68, 0x39, 0x99, 0x42, 0x3b, 0x3a, 0x39, 0x44, 0x75, 0xbc, 0x0a, 0xcb, 0x72, 0x8a, 0xd8, + 0x89, 0x95, 0x29, 0xe8, 0xc1, 0x3d, 0x84, 0x26, 0x8e, 0x48, 0x2b, 0xab, 0x19, 0xe0, 0xc1, 0x3d, + 0x84, 0x1b, 0x7b, 0x50, 0x14, 0xd9, 0x85, 0x31, 0xd4, 0x0f, 0x5a, 0xbb, 0xda, 0x81, 0xd1, 0xed, + 0x1d, 0x77, 0xba, 0x47, 0xad, 0x03, 0xa4, 0x4c, 0x30, 0x5d, 0xfb, 0xd9, 0x49, 0x47, 0xd7, 0xda, + 0x28, 0x97, 0xc6, 0x7a, 0x5a, 0xeb, 0x58, 0x6b, 0xa3, 0x7c, 0xc3, 0x84, 0xf5, 0x79, 0x75, 0x66, + 0xee, 0xc9, 0x48, 0x6d, 0x71, 0x6e, 0xc1, 0x16, 0x0b, 0x5b, 0x33, 0x5b, 0xfc, 0x95, 0x02, 0x6b, + 0x73, 0x6a, 0xed, 0xdc, 0x49, 0x7e, 0x0a, 0x45, 0x99, 0xa2, 0xf2, 0xf6, 0xb9, 0x39, 0xb7, 0x68, + 0x8b, 0x84, 0x9d, 0xb9, 0x81, 0x84, 0x5e, 0xfa, 0x06, 0xce, 0x2f, 0xb8, 0x81, 0xb9, 0x89, 0x19, + 0x27, 0x7f, 0xa5, 0x80, 0xba, 0xc8, 0xf6, 0x6b, 0x0a, 0x45, 0x2e, 0x53, 0x28, 0x3e, 0x99, 0x76, + 0xe0, 0xea, 0xe2, 0x35, 0xcc, 0x78, 0xf1, 0xb5, 0x02, 0x97, 0xe6, 0x37, 0x2a, 0x73, 0x7d, 0xf8, + 0x14, 0x4a, 0x23, 0x1a, 0x9e, 0xb9, 0xf1, 0x65, 0xfd, 0xc1, 0x9c, 0x2b, 0x80, 0x8b, 0xa7, 0x63, + 0x15, 0x69, 0xa5, 0xef, 0x90, 0xfc, 0xa2, 0x6e, 0x43, 0x7a, 0x33, 0xe3, 0xe9, 0xaf, 0x73, 0xf0, + 0xe6, 0x5c, 0xe3, 0x73, 0x1d, 0x7d, 0x17, 0xc0, 0x66, 0xde, 0x38, 0x94, 0x17, 0xb2, 0xac, 0x4f, + 0x15, 0x81, 0x88, 0xb3, 0xcf, 0x6b, 0xcf, 0x38, 0x4c, 0xe4, 0x79, 0x21, 0x07, 0x09, 0x09, 0xc2, + 0xc3, 0x89, 0xa3, 0x05, 0xe1, 0xe8, 0x7b, 0x0b, 0x56, 0x3a, 0x73, 0xd7, 0x7d, 0x08, 0xc8, 0x74, + 0x6c, 0xca, 0x42, 0x23, 0x08, 0x7d, 0x4a, 0x46, 0x36, 0x1b, 0x8a, 0x02, 0x5c, 0xde, 0x29, 0x0e, + 0x88, 0x13, 0x50, 0x7d, 0x45, 0x8a, 0xfb, 0xb1, 0x94, 0x6b, 0x88, 0x5b, 0xc6, 0x4f, 0x69, 0x94, + 0x32, 0x1a, 0x52, 0x9c, 0x68, 0x34, 0x7e, 0xb3, 0x04, 0xd5, 0x54, 0x5b, 0x87, 0xaf, 0x42, 0xed, + 0x29, 0x79, 0x4e, 0x8c, 0xb8, 0x55, 0x97, 0x91, 0xa8, 0x72, 0xac, 0x17, 0xb5, 0xeb, 0x1f, 0xc2, + 0xba, 0xa0, 0xb8, 0xe3, 0x90, 0xfa, 0x86, 0xe9, 0x90, 0x20, 0x10, 0x41, 0x2b, 0x0b, 0x2a, 0xe6, + 0xb2, 0x2e, 0x17, 0xed, 0xc5, 0x12, 0x7c, 0x1f, 0xd6, 0x84, 0xc6, 0x68, 0xec, 0x84, 0xb6, 0xe7, + 0x50, 0x83, 0x7f, 0x3c, 0x04, 0xa2, 0x10, 0x27, 0x9e, 0xad, 0x72, 0xc6, 0x61, 0x44, 0xe0, 0x1e, + 0x05, 0xb8, 0x0d, 0xef, 0x0a, 0xb5, 0x21, 0x65, 0xd4, 0x27, 0x21, 0x35, 0xe8, 0x2f, 0xc7, 0xc4, + 0x09, 0x0c, 0xc2, 0x2c, 0xe3, 0x8c, 0x04, 0x67, 0xea, 0x3a, 0x37, 0xb0, 0x9b, 0x53, 0x15, 0xfd, + 0x32, 0x27, 0xee, 0x47, 0x3c, 0x4d, 0xd0, 0x5a, 0xcc, 0xfa, 0x8c, 0x04, 0x67, 0x78, 0x07, 0x2e, + 0x09, 0x2b, 0x41, 0xe8, 0xdb, 0x6c, 0x68, 0x98, 0x67, 0xd4, 0x7c, 0x66, 0x8c, 0xc3, 0xc1, 0x43, + 0xf5, 0xed, 0xf4, 0xfc, 0xc2, 0xc3, 0xbe, 0xe0, 0xec, 0x71, 0xca, 0x49, 0x38, 0x78, 0x88, 0xfb, + 0x50, 0xe3, 0x9b, 0x31, 0xb2, 0xbf, 0xa4, 0xc6, 0xc0, 0xf5, 0xc5, 0xcd, 0x52, 0x9f, 0x73, 0xb2, + 0x53, 0x11, 0x6c, 0x76, 0x23, 0x85, 0x43, 0xd7, 0xa2, 0x3b, 0xc5, 0x7e, 0x4f, 0xd3, 0xda, 0x7a, + 0x35, 0xb6, 0xf2, 0xc8, 0xf5, 0x79, 0x42, 0x0d, 0xdd, 0x24, 0xc0, 0x55, 0x99, 0x50, 0x43, 0x37, + 0x0e, 0xef, 0x7d, 0x58, 0x33, 0x4d, 0xb9, 0x66, 0xdb, 0x34, 0xa2, 0x16, 0x3f, 0x50, 0x51, 0x26, + 0x58, 0xa6, 0xb9, 0x2f, 0x09, 0x51, 0x8e, 0x07, 0xf8, 0x63, 0x78, 0x73, 0x12, 0xac, 0xb4, 0xe2, + 0xea, 0xcc, 0x2a, 0xa7, 0x55, 0xef, 0xc3, 0x9a, 0x77, 0x3e, 0xab, 0x88, 0x33, 0x33, 0x7a, 0xe7, + 0xd3, 0x6a, 0xd7, 0xc5, 0x67, 0x9b, 0x4f, 0x4d, 0x12, 0x52, 0x4b, 0x7d, 0x2b, 0xcd, 0x4e, 0x09, + 0xf0, 0x1d, 0x40, 0xa6, 0x69, 0x50, 0x46, 0x4e, 0x1d, 0x6a, 0x10, 0x9f, 0x32, 0x12, 0xa8, 0x57, + 0xd2, 0xe4, 0xba, 0x69, 0x6a, 0x42, 0xda, 0x12, 0x42, 0x7c, 0x0b, 0x56, 0xdd, 0xd3, 0xa7, 0xa6, + 0xcc, 0x2c, 0xc3, 0xf3, 0xe9, 0xc0, 0x7e, 0xa9, 0x5e, 0x13, 0x61, 0x5a, 0xe1, 0x02, 0x91, 0x57, + 0x3d, 0x01, 0xe3, 0x9b, 0x80, 0xcc, 0xe0, 0x8c, 0xf8, 0x9e, 0xb8, 0xda, 0x03, 0x8f, 0x98, 0x54, + 0xbd, 0x2e, 0xa9, 0x12, 0x3f, 0x8a, 0x61, 0xfc, 0x04, 0xd6, 0xc7, 0xcc, 0x66, 0x21, 0xf5, 0x3d, + 0x9f, 0xf2, 0x0e, 0x5d, 0x1e, 0x33, 0xf5, 0x5f, 0x4b, 0x0b, 0x7a, 0xec, 0x93, 0x34, 0x5b, 0xee, + 0xae, 0xbe, 0x36, 0x9e, 0x05, 0x1b, 0x3b, 0x50, 0x4b, 0x6f, 0x3a, 0xae, 0x80, 0xdc, 0x76, 0xa4, + 0xf0, 0x0b, 0x74, 0xaf, 0xdb, 0xe6, 0x57, 0xdf, 0x17, 0x1a, 0xca, 0xf1, 0x2b, 0xf8, 0xa0, 0x73, + 0xac, 0x19, 0xfa, 0xc9, 0xd1, 0x71, 0xe7, 0x50, 0x43, 0xf9, 0x5b, 0x95, 0xf2, 0xbf, 0x97, 0xd0, + 0xab, 0x57, 0xaf, 0x5e, 0xe5, 0x1e, 0x17, 0xca, 0x1f, 0xa0, 0x1b, 0x8d, 0xbf, 0xe6, 0xa0, 0x9e, + 0x6d, 0x7e, 0xf1, 0x4f, 0xe0, 0xad, 0xf8, 0x4b, 0x35, 0xa0, 0xa1, 0xf1, 0xc2, 0xf6, 0x45, 0x36, + 0x8e, 0x88, 0x6c, 0x1f, 0x93, 0x40, 0xae, 0x47, 0xac, 0x3e, 0x0d, 0x7f, 0x61, 0xfb, 0x3c, 0xd7, + 0x46, 0x24, 0xc4, 0x07, 0x70, 0x85, 0xb9, 0x46, 0x10, 0x12, 0x66, 0x11, 0xdf, 0x32, 0x26, 0x6f, + 0x04, 0x06, 0x31, 0x4d, 0x1a, 0x04, 0xae, 0xbc, 0x05, 0x12, 0x2b, 0xef, 0x30, 0xb7, 0x1f, 0x91, + 0x27, 0xe5, 0xb1, 0x15, 0x51, 0xa7, 0x36, 0x3d, 0xbf, 0x68, 0xd3, 0xdf, 0x86, 0xca, 0x88, 0x78, + 0x06, 0x65, 0xa1, 0x7f, 0x2e, 0x5a, 0xb6, 0xb2, 0x5e, 0x1e, 0x11, 0x4f, 0xe3, 0xe3, 0xef, 0x6e, + 0x27, 0xb2, 0xd1, 0x2c, 0xa3, 0x4a, 0xe3, 0x1f, 0x79, 0xa8, 0xa5, 0x9b, 0x37, 0xde, 0x0b, 0x9b, + 0xa2, 0x50, 0x2b, 0xe2, 0x28, 0xbf, 0xff, 0x8d, 0xad, 0x5e, 0x73, 0x8f, 0x57, 0xf0, 0x9d, 0x92, + 0x6c, 0xa9, 0x74, 0xa9, 0xc9, 0x6f, 0x4f, 0x7e, 0x78, 0xa9, 0x6c, 0xd4, 0xcb, 0x7a, 0x34, 0xc2, + 0xfb, 0x50, 0x7a, 0x1a, 0x08, 0xdb, 0x25, 0x61, 0xfb, 0xda, 0x37, 0xdb, 0x7e, 0xdc, 0x17, 0xc6, + 0x2b, 0x8f, 0xfb, 0xc6, 0x51, 0x57, 0x3f, 0x6c, 0x1d, 0xe8, 0x91, 0x3a, 0xbe, 0x0c, 0x05, 0x87, + 0x7c, 0x79, 0x9e, 0xad, 0xf5, 0x02, 0xba, 0x68, 0xf8, 0x2f, 0x43, 0xe1, 0x05, 0x25, 0xcf, 0xb2, + 0x15, 0x56, 0x40, 0xdf, 0xe1, 0x31, 0xb8, 0x03, 0x45, 0x11, 0x2f, 0x0c, 0x10, 0x45, 0x0c, 0xbd, + 0x81, 0xcb, 0x50, 0xd8, 0xeb, 0xea, 0xfc, 0x28, 0x20, 0xa8, 0x49, 0xd4, 0xe8, 0x75, 0xb4, 0x3d, + 0x0d, 0xe5, 0x1a, 0xf7, 0xa1, 0x24, 0x83, 0xc0, 0x8f, 0x49, 0x12, 0x06, 0xf4, 0x46, 0x34, 0x8c, + 0x6c, 0x28, 0xb1, 0xf4, 0xe4, 0x70, 0x57, 0xd3, 0x51, 0x2e, 0xbb, 0xc9, 0x05, 0x54, 0x6c, 0x04, + 0x50, 0x4b, 0x77, 0x6f, 0xdf, 0x4b, 0x7e, 0x35, 0xfe, 0xa2, 0x40, 0x35, 0xd5, 0x8d, 0xf1, 0x3e, + 0x80, 0x38, 0x8e, 0xfb, 0xc2, 0x20, 0x8e, 0x4d, 0x82, 0x28, 0x35, 0x40, 0x40, 0x2d, 0x8e, 0x5c, + 0x74, 0xeb, 0xbe, 0x17, 0xe7, 0xff, 0xa8, 0x00, 0x9a, 0xee, 0xe4, 0xa6, 0x1c, 0x54, 0x7e, 0x50, + 0x07, 0xff, 0xa0, 0x40, 0x3d, 0xdb, 0xbe, 0x4d, 0xb9, 0x77, 0xf5, 0x07, 0x75, 0xef, 0xf7, 0x0a, + 0x2c, 0x67, 0x9a, 0xb6, 0xff, 0x2b, 0xef, 0x7e, 0x97, 0x87, 0xb5, 0x39, 0x7a, 0xb8, 0x15, 0x75, + 0xb7, 0xb2, 0xe1, 0xfe, 0xf1, 0x45, 0xe6, 0x6a, 0xf2, 0xfb, 0xb3, 0x47, 0xfc, 0x30, 0x6a, 0x86, + 0x6f, 0x02, 0xb2, 0x2d, 0xca, 0x42, 0x7b, 0x60, 0x53, 0x3f, 0xfa, 0x22, 0x97, 0x2d, 0xef, 0xca, + 0x04, 0x97, 0x1f, 0xe5, 0x3f, 0x02, 0xec, 0xb9, 0x81, 0x1d, 0xda, 0xcf, 0xa9, 0x61, 0xb3, 0xf8, + 0xf3, 0x9d, 0xb7, 0xc0, 0x05, 0x1d, 0xc5, 0x92, 0x0e, 0x0b, 0x13, 0x36, 0xa3, 0x43, 0x32, 0xc5, + 0xe6, 0x15, 0x30, 0xaf, 0xa3, 0x58, 0x92, 0xb0, 0xaf, 0x42, 0xcd, 0x72, 0xc7, 0xbc, 0xa1, 0x90, + 0x3c, 0x5e, 0x70, 0x15, 0xbd, 0x2a, 0xb1, 0x84, 0x12, 0x75, 0x7c, 0x93, 0x77, 0x83, 0x9a, 0x5e, + 0x95, 0x98, 0xa4, 0xdc, 0x80, 0x15, 0x32, 0x1c, 0xfa, 0xdc, 0x78, 0x6c, 0x48, 0xf6, 0xb0, 0xf5, + 0x04, 0x16, 0xc4, 0x8d, 0xc7, 0x50, 0x8e, 0xe3, 0xc0, 0x6f, 0x36, 0x1e, 0x09, 0xc3, 0x93, 0xaf, + 0x37, 0xb9, 0xad, 0x8a, 0x5e, 0x66, 0xb1, 0xf0, 0x2a, 0xd4, 0xec, 0xc0, 0x98, 0x3c, 0x23, 0xe6, + 0x36, 0x73, 0x5b, 0x65, 0xbd, 0x6a, 0x07, 0xc9, 0xbb, 0x51, 0xe3, 0xeb, 0x1c, 0xd4, 0xb3, 0xcf, + 0xa0, 0xb8, 0x0d, 0x65, 0xc7, 0x35, 0x89, 0x48, 0x04, 0xf9, 0x06, 0xbf, 0xf5, 0x9a, 0x97, 0xd3, + 0xe6, 0x41, 0xc4, 0xd7, 0x13, 0xcd, 0x8d, 0xbf, 0x29, 0x50, 0x8e, 0x61, 0x7c, 0x09, 0x0a, 0x1e, + 0x09, 0xcf, 0x84, 0xb9, 0xe2, 0x6e, 0x0e, 0x29, 0xba, 0x18, 0x73, 0x3c, 0xf0, 0x08, 0x13, 0x29, + 0x10, 0xe1, 0x7c, 0xcc, 0xf7, 0xd5, 0xa1, 0xc4, 0x12, 0x0d, 0xb2, 0x3b, 0x1a, 0x51, 0x16, 0x06, + 0xf1, 0xbe, 0x46, 0xf8, 0x5e, 0x04, 0xe3, 0xdb, 0xb0, 0x1a, 0xfa, 0xc4, 0x76, 0x32, 0xdc, 0x82, + 0xe0, 0xa2, 0x58, 0x90, 0x90, 0x77, 0xe0, 0x72, 0x6c, 0xd7, 0xa2, 0x21, 0x31, 0xcf, 0xa8, 0x35, + 0x51, 0x2a, 0x89, 0x37, 0xb6, 0xb7, 0x22, 0x42, 0x3b, 0x92, 0xc7, 0xba, 0x8d, 0xbf, 0x2b, 0xb0, + 0x1a, 0xb7, 0xf4, 0x56, 0x12, 0xac, 0x43, 0x00, 0xc2, 0x98, 0x1b, 0xa6, 0xc3, 0x35, 0x9b, 0xca, + 0x33, 0x7a, 0xcd, 0x56, 0xa2, 0xa4, 0xa7, 0x0c, 0x6c, 0x8c, 0x00, 0x26, 0x92, 0x85, 0x61, 0xbb, + 0x02, 0xd5, 0xe8, 0x8d, 0x5b, 0xfc, 0xa3, 0x44, 0x7e, 0x04, 0x82, 0x84, 0x78, 0xef, 0x8f, 0xd7, + 0xa1, 0x78, 0x4a, 0x87, 0x36, 0x8b, 0x5e, 0xde, 0xe4, 0x20, 0x7e, 0xcf, 0x2b, 0x24, 0xef, 0x79, + 0xbb, 0x4f, 0x60, 0xcd, 0x74, 0x47, 0xd3, 0xee, 0xee, 0xa2, 0xa9, 0x0f, 0xd1, 0xe0, 0x33, 0xe5, + 0x0b, 0x98, 0x74, 0x6a, 0x5f, 0xe5, 0xf2, 0xfb, 0xbd, 0xdd, 0x3f, 0xe5, 0x36, 0xf6, 0xa5, 0x5e, + 0x2f, 0x5e, 0xa6, 0x4e, 0x07, 0x0e, 0x35, 0xb9, 0xeb, 0xff, 0x0d, 0x00, 0x00, 0xff, 0xff, 0x5f, + 0x1c, 0x48, 0x4f, 0x0d, 0x1a, 0x00, 0x00, +} diff --git a/vendor/github.com/grpc-ecosystem/grpc-gateway/runtime/context.go b/vendor/github.com/grpc-ecosystem/grpc-gateway/runtime/context.go new file mode 100644 index 0000000..98eeb44 --- /dev/null +++ b/vendor/github.com/grpc-ecosystem/grpc-gateway/runtime/context.go @@ -0,0 +1,187 @@ +package runtime + +import ( + "fmt" + "net" + "net/http" + "strconv" + "strings" + "time" + + "golang.org/x/net/context" + "google.golang.org/grpc" + "google.golang.org/grpc/codes" + "google.golang.org/grpc/grpclog" + "google.golang.org/grpc/metadata" +) + +// MetadataHeaderPrefix is the http prefix that represents custom metadata +// parameters to or from a gRPC call. +const MetadataHeaderPrefix = "Grpc-Metadata-" + +// MetadataPrefix is the prefix for grpc-gateway supplied custom metadata fields. +const MetadataPrefix = "grpcgateway-" + +// MetadataTrailerPrefix is prepended to gRPC metadata as it is converted to +// HTTP headers in a response handled by grpc-gateway +const MetadataTrailerPrefix = "Grpc-Trailer-" + +const metadataGrpcTimeout = "Grpc-Timeout" + +const xForwardedFor = "X-Forwarded-For" +const xForwardedHost = "X-Forwarded-Host" + +var ( + // DefaultContextTimeout is used for gRPC call context.WithTimeout whenever a Grpc-Timeout inbound + // header isn't present. If the value is 0 the sent `context` will not have a timeout. + DefaultContextTimeout = 0 * time.Second +) + +/* +AnnotateContext adds context information such as metadata from the request. + +At a minimum, the RemoteAddr is included in the fashion of "X-Forwarded-For", +except that the forwarded destination is not another HTTP service but rather +a gRPC service. +*/ +func AnnotateContext(ctx context.Context, req *http.Request) (context.Context, error) { + var pairs []string + timeout := DefaultContextTimeout + if tm := req.Header.Get(metadataGrpcTimeout); tm != "" { + var err error + timeout, err = timeoutDecode(tm) + if err != nil { + return nil, grpc.Errorf(codes.InvalidArgument, "invalid grpc-timeout: %s", tm) + } + } + + for key, vals := range req.Header { + for _, val := range vals { + // For backwards-compatibility, pass through 'authorization' header with no prefix. + if strings.ToLower(key) == "authorization" { + pairs = append(pairs, "authorization", val) + } + if isPermanentHTTPHeader(key) { + pairs = append(pairs, strings.ToLower(fmt.Sprintf("%s%s", MetadataPrefix, key)), val) + continue + } + if strings.HasPrefix(key, MetadataHeaderPrefix) { + pairs = append(pairs, key[len(MetadataHeaderPrefix):], val) + } + } + } + if host := req.Header.Get(xForwardedHost); host != "" { + pairs = append(pairs, strings.ToLower(xForwardedHost), host) + } else if req.Host != "" { + pairs = append(pairs, strings.ToLower(xForwardedHost), req.Host) + } + + if addr := req.RemoteAddr; addr != "" { + if remoteIP, _, err := net.SplitHostPort(addr); err == nil { + if fwd := req.Header.Get(xForwardedFor); fwd == "" { + pairs = append(pairs, strings.ToLower(xForwardedFor), remoteIP) + } else { + pairs = append(pairs, strings.ToLower(xForwardedFor), fmt.Sprintf("%s, %s", fwd, remoteIP)) + } + } else { + grpclog.Printf("invalid remote addr: %s", addr) + } + } + + if timeout != 0 { + ctx, _ = context.WithTimeout(ctx, timeout) + } + if len(pairs) == 0 { + return ctx, nil + } + return metadata.NewContext(ctx, metadata.Pairs(pairs...)), nil +} + +// ServerMetadata consists of metadata sent from gRPC server. +type ServerMetadata struct { + HeaderMD metadata.MD + TrailerMD metadata.MD +} + +type serverMetadataKey struct{} + +// NewServerMetadataContext creates a new context with ServerMetadata +func NewServerMetadataContext(ctx context.Context, md ServerMetadata) context.Context { + return context.WithValue(ctx, serverMetadataKey{}, md) +} + +// ServerMetadataFromContext returns the ServerMetadata in ctx +func ServerMetadataFromContext(ctx context.Context) (md ServerMetadata, ok bool) { + md, ok = ctx.Value(serverMetadataKey{}).(ServerMetadata) + return +} + +func timeoutDecode(s string) (time.Duration, error) { + size := len(s) + if size < 2 { + return 0, fmt.Errorf("timeout string is too short: %q", s) + } + d, ok := timeoutUnitToDuration(s[size-1]) + if !ok { + return 0, fmt.Errorf("timeout unit is not recognized: %q", s) + } + t, err := strconv.ParseInt(s[:size-1], 10, 64) + if err != nil { + return 0, err + } + return d * time.Duration(t), nil +} + +func timeoutUnitToDuration(u uint8) (d time.Duration, ok bool) { + switch u { + case 'H': + return time.Hour, true + case 'M': + return time.Minute, true + case 'S': + return time.Second, true + case 'm': + return time.Millisecond, true + case 'u': + return time.Microsecond, true + case 'n': + return time.Nanosecond, true + default: + } + return +} + +// isPermanentHTTPHeader checks whether hdr belongs to the list of +// permenant request headers maintained by IANA. +// http://www.iana.org/assignments/message-headers/message-headers.xml +func isPermanentHTTPHeader(hdr string) bool { + switch hdr { + case + "Accept", + "Accept-Charset", + "Accept-Language", + "Accept-Ranges", + "Authorization", + "Cache-Control", + "Content-Type", + "Cookie", + "Date", + "Expect", + "From", + "Host", + "If-Match", + "If-Modified-Since", + "If-None-Match", + "If-Schedule-Tag-Match", + "If-Unmodified-Since", + "Max-Forwards", + "Origin", + "Pragma", + "Referer", + "User-Agent", + "Via", + "Warning": + return true + } + return false +} diff --git a/vendor/github.com/grpc-ecosystem/grpc-gateway/runtime/convert.go b/vendor/github.com/grpc-ecosystem/grpc-gateway/runtime/convert.go new file mode 100644 index 0000000..1af5cc4 --- /dev/null +++ b/vendor/github.com/grpc-ecosystem/grpc-gateway/runtime/convert.go @@ -0,0 +1,58 @@ +package runtime + +import ( + "strconv" +) + +// String just returns the given string. +// It is just for compatibility to other types. +func String(val string) (string, error) { + return val, nil +} + +// Bool converts the given string representation of a boolean value into bool. +func Bool(val string) (bool, error) { + return strconv.ParseBool(val) +} + +// Float64 converts the given string representation into representation of a floating point number into float64. +func Float64(val string) (float64, error) { + return strconv.ParseFloat(val, 64) +} + +// Float32 converts the given string representation of a floating point number into float32. +func Float32(val string) (float32, error) { + f, err := strconv.ParseFloat(val, 32) + if err != nil { + return 0, err + } + return float32(f), nil +} + +// Int64 converts the given string representation of an integer into int64. +func Int64(val string) (int64, error) { + return strconv.ParseInt(val, 0, 64) +} + +// Int32 converts the given string representation of an integer into int32. +func Int32(val string) (int32, error) { + i, err := strconv.ParseInt(val, 0, 32) + if err != nil { + return 0, err + } + return int32(i), nil +} + +// Uint64 converts the given string representation of an integer into uint64. +func Uint64(val string) (uint64, error) { + return strconv.ParseUint(val, 0, 64) +} + +// Uint32 converts the given string representation of an integer into uint32. +func Uint32(val string) (uint32, error) { + i, err := strconv.ParseUint(val, 0, 32) + if err != nil { + return 0, err + } + return uint32(i), nil +} diff --git a/vendor/github.com/grpc-ecosystem/grpc-gateway/runtime/doc.go b/vendor/github.com/grpc-ecosystem/grpc-gateway/runtime/doc.go new file mode 100644 index 0000000..b6e5ddf --- /dev/null +++ b/vendor/github.com/grpc-ecosystem/grpc-gateway/runtime/doc.go @@ -0,0 +1,5 @@ +/* +Package runtime contains runtime helper functions used by +servers which protoc-gen-grpc-gateway generates. +*/ +package runtime diff --git a/vendor/github.com/grpc-ecosystem/grpc-gateway/runtime/errors.go b/vendor/github.com/grpc-ecosystem/grpc-gateway/runtime/errors.go new file mode 100644 index 0000000..5a51d02 --- /dev/null +++ b/vendor/github.com/grpc-ecosystem/grpc-gateway/runtime/errors.go @@ -0,0 +1,121 @@ +package runtime + +import ( + "io" + "net/http" + + "github.com/golang/protobuf/proto" + "golang.org/x/net/context" + "google.golang.org/grpc" + "google.golang.org/grpc/codes" + "google.golang.org/grpc/grpclog" +) + +// HTTPStatusFromCode converts a gRPC error code into the corresponding HTTP response status. +func HTTPStatusFromCode(code codes.Code) int { + switch code { + case codes.OK: + return http.StatusOK + case codes.Canceled: + return http.StatusRequestTimeout + case codes.Unknown: + return http.StatusInternalServerError + case codes.InvalidArgument: + return http.StatusBadRequest + case codes.DeadlineExceeded: + return http.StatusRequestTimeout + case codes.NotFound: + return http.StatusNotFound + case codes.AlreadyExists: + return http.StatusConflict + case codes.PermissionDenied: + return http.StatusForbidden + case codes.Unauthenticated: + return http.StatusUnauthorized + case codes.ResourceExhausted: + return http.StatusForbidden + case codes.FailedPrecondition: + return http.StatusPreconditionFailed + case codes.Aborted: + return http.StatusConflict + case codes.OutOfRange: + return http.StatusBadRequest + case codes.Unimplemented: + return http.StatusNotImplemented + case codes.Internal: + return http.StatusInternalServerError + case codes.Unavailable: + return http.StatusServiceUnavailable + case codes.DataLoss: + return http.StatusInternalServerError + } + + grpclog.Printf("Unknown gRPC error code: %v", code) + return http.StatusInternalServerError +} + +var ( + // HTTPError replies to the request with the error. + // You can set a custom function to this variable to customize error format. + HTTPError = DefaultHTTPError + // OtherErrorHandler handles the following error used by the gateway: StatusMethodNotAllowed StatusNotFound and StatusBadRequest + OtherErrorHandler = DefaultOtherErrorHandler +) + +type errorBody struct { + Error string `protobuf:"bytes,1,name=error" json:"error"` + Code int32 `protobuf:"varint,2,name=code" json:"code"` +} + +//Make this also conform to proto.Message for builtin JSONPb Marshaler +func (e *errorBody) Reset() { *e = errorBody{} } +func (e *errorBody) String() string { return proto.CompactTextString(e) } +func (*errorBody) ProtoMessage() {} + +// DefaultHTTPError is the default implementation of HTTPError. +// If "err" is an error from gRPC system, the function replies with the status code mapped by HTTPStatusFromCode. +// If otherwise, it replies with http.StatusInternalServerError. +// +// The response body returned by this function is a JSON object, +// which contains a member whose key is "error" and whose value is err.Error(). +func DefaultHTTPError(ctx context.Context, marshaler Marshaler, w http.ResponseWriter, _ *http.Request, err error) { + const fallback = `{"error": "failed to marshal error message"}` + + w.Header().Del("Trailer") + w.Header().Set("Content-Type", marshaler.ContentType()) + body := &errorBody{ + Error: grpc.ErrorDesc(err), + Code: int32(grpc.Code(err)), + } + + buf, merr := marshaler.Marshal(body) + if merr != nil { + grpclog.Printf("Failed to marshal error message %q: %v", body, merr) + w.WriteHeader(http.StatusInternalServerError) + if _, err := io.WriteString(w, fallback); err != nil { + grpclog.Printf("Failed to write response: %v", err) + } + return + } + + md, ok := ServerMetadataFromContext(ctx) + if !ok { + grpclog.Printf("Failed to extract ServerMetadata from context") + } + + handleForwardResponseServerMetadata(w, md) + handleForwardResponseTrailerHeader(w, md) + st := HTTPStatusFromCode(grpc.Code(err)) + w.WriteHeader(st) + if _, err := w.Write(buf); err != nil { + grpclog.Printf("Failed to write response: %v", err) + } + + handleForwardResponseTrailer(w, md) +} + +// DefaultOtherErrorHandler is the default implementation of OtherErrorHandler. +// It simply writes a string representation of the given error into "w". +func DefaultOtherErrorHandler(w http.ResponseWriter, _ *http.Request, msg string, code int) { + http.Error(w, msg, code) +} diff --git a/vendor/github.com/grpc-ecosystem/grpc-gateway/runtime/handler.go b/vendor/github.com/grpc-ecosystem/grpc-gateway/runtime/handler.go new file mode 100644 index 0000000..d704085 --- /dev/null +++ b/vendor/github.com/grpc-ecosystem/grpc-gateway/runtime/handler.go @@ -0,0 +1,164 @@ +package runtime + +import ( + "fmt" + "io" + "net/http" + "net/textproto" + + "github.com/golang/protobuf/proto" + "github.com/grpc-ecosystem/grpc-gateway/runtime/internal" + "golang.org/x/net/context" + "google.golang.org/grpc" + "google.golang.org/grpc/grpclog" +) + +// ForwardResponseStream forwards the stream from gRPC server to REST client. +func ForwardResponseStream(ctx context.Context, marshaler Marshaler, w http.ResponseWriter, req *http.Request, recv func() (proto.Message, error), opts ...func(context.Context, http.ResponseWriter, proto.Message) error) { + f, ok := w.(http.Flusher) + if !ok { + grpclog.Printf("Flush not supported in %T", w) + http.Error(w, "unexpected type of web server", http.StatusInternalServerError) + return + } + + md, ok := ServerMetadataFromContext(ctx) + if !ok { + grpclog.Printf("Failed to extract ServerMetadata from context") + http.Error(w, "unexpected error", http.StatusInternalServerError) + return + } + handleForwardResponseServerMetadata(w, md) + + w.Header().Set("Transfer-Encoding", "chunked") + w.Header().Set("Content-Type", marshaler.ContentType()) + if err := handleForwardResponseOptions(ctx, w, nil, opts); err != nil { + http.Error(w, err.Error(), http.StatusInternalServerError) + return + } + w.WriteHeader(http.StatusOK) + f.Flush() + for { + resp, err := recv() + if err == io.EOF { + return + } + if err != nil { + handleForwardResponseStreamError(marshaler, w, err) + return + } + if err := handleForwardResponseOptions(ctx, w, resp, opts); err != nil { + handleForwardResponseStreamError(marshaler, w, err) + return + } + + buf, err := marshaler.Marshal(streamChunk(resp, nil)) + if err != nil { + grpclog.Printf("Failed to marshal response chunk: %v", err) + return + } + if _, err = fmt.Fprintf(w, "%s\n", buf); err != nil { + grpclog.Printf("Failed to send response chunk: %v", err) + return + } + f.Flush() + } +} + +func handleForwardResponseServerMetadata(w http.ResponseWriter, md ServerMetadata) { + for k, vs := range md.HeaderMD { + hKey := fmt.Sprintf("%s%s", MetadataHeaderPrefix, k) + for i := range vs { + w.Header().Add(hKey, vs[i]) + } + } +} + +func handleForwardResponseTrailerHeader(w http.ResponseWriter, md ServerMetadata) { + for k := range md.TrailerMD { + tKey := textproto.CanonicalMIMEHeaderKey(fmt.Sprintf("%s%s", MetadataTrailerPrefix, k)) + w.Header().Add("Trailer", tKey) + } +} + +func handleForwardResponseTrailer(w http.ResponseWriter, md ServerMetadata) { + for k, vs := range md.TrailerMD { + tKey := fmt.Sprintf("%s%s", MetadataTrailerPrefix, k) + for i := range vs { + w.Header().Add(tKey, vs[i]) + } + } +} + +// ForwardResponseMessage forwards the message "resp" from gRPC server to REST client. +func ForwardResponseMessage(ctx context.Context, marshaler Marshaler, w http.ResponseWriter, req *http.Request, resp proto.Message, opts ...func(context.Context, http.ResponseWriter, proto.Message) error) { + md, ok := ServerMetadataFromContext(ctx) + if !ok { + grpclog.Printf("Failed to extract ServerMetadata from context") + } + + handleForwardResponseServerMetadata(w, md) + handleForwardResponseTrailerHeader(w, md) + w.Header().Set("Content-Type", marshaler.ContentType()) + if err := handleForwardResponseOptions(ctx, w, resp, opts); err != nil { + HTTPError(ctx, marshaler, w, req, err) + return + } + + buf, err := marshaler.Marshal(resp) + if err != nil { + grpclog.Printf("Marshal error: %v", err) + HTTPError(ctx, marshaler, w, req, err) + return + } + + if _, err = w.Write(buf); err != nil { + grpclog.Printf("Failed to write response: %v", err) + } + + handleForwardResponseTrailer(w, md) +} + +func handleForwardResponseOptions(ctx context.Context, w http.ResponseWriter, resp proto.Message, opts []func(context.Context, http.ResponseWriter, proto.Message) error) error { + if len(opts) == 0 { + return nil + } + for _, opt := range opts { + if err := opt(ctx, w, resp); err != nil { + grpclog.Printf("Error handling ForwardResponseOptions: %v", err) + return err + } + } + return nil +} + +func handleForwardResponseStreamError(marshaler Marshaler, w http.ResponseWriter, err error) { + buf, merr := marshaler.Marshal(streamChunk(nil, err)) + if merr != nil { + grpclog.Printf("Failed to marshal an error: %v", merr) + return + } + if _, werr := fmt.Fprintf(w, "%s\n", buf); werr != nil { + grpclog.Printf("Failed to notify error to client: %v", werr) + return + } +} + +func streamChunk(result proto.Message, err error) map[string]proto.Message { + if err != nil { + grpcCode := grpc.Code(err) + httpCode := HTTPStatusFromCode(grpcCode) + return map[string]proto.Message{ + "error": &internal.StreamError{ + GrpcCode: int32(grpcCode), + HttpCode: int32(httpCode), + Message: err.Error(), + HttpStatus: http.StatusText(httpCode), + }, + } + } + if result == nil { + return streamChunk(nil, fmt.Errorf("empty response")) + } + return map[string]proto.Message{"result": result} +} diff --git a/vendor/github.com/grpc-ecosystem/grpc-gateway/runtime/internal/stream_chunk.pb.go b/vendor/github.com/grpc-ecosystem/grpc-gateway/runtime/internal/stream_chunk.pb.go new file mode 100644 index 0000000..e2486eb --- /dev/null +++ b/vendor/github.com/grpc-ecosystem/grpc-gateway/runtime/internal/stream_chunk.pb.go @@ -0,0 +1,93 @@ +// Code generated by protoc-gen-go. +// source: runtime/internal/stream_chunk.proto +// DO NOT EDIT! + +/* +Package internal is a generated protocol buffer package. + +It is generated from these files: + runtime/internal/stream_chunk.proto + +It has these top-level messages: + StreamError +*/ +package internal + +import proto "github.com/golang/protobuf/proto" +import fmt "fmt" +import math "math" + +// Reference imports to suppress errors if they are not otherwise used. +var _ = proto.Marshal +var _ = fmt.Errorf +var _ = math.Inf + +// This is a compile-time assertion to ensure that this generated file +// is compatible with the proto package it is being compiled against. +// A compilation error at this line likely means your copy of the +// proto package needs to be updated. +const _ = proto.ProtoPackageIsVersion2 // please upgrade the proto package + +// StreamError is a response type which is returned when +// streaming rpc returns an error. +type StreamError struct { + GrpcCode int32 `protobuf:"varint,1,opt,name=grpc_code,json=grpcCode" json:"grpc_code,omitempty"` + HttpCode int32 `protobuf:"varint,2,opt,name=http_code,json=httpCode" json:"http_code,omitempty"` + Message string `protobuf:"bytes,3,opt,name=message" json:"message,omitempty"` + HttpStatus string `protobuf:"bytes,4,opt,name=http_status,json=httpStatus" json:"http_status,omitempty"` +} + +func (m *StreamError) Reset() { *m = StreamError{} } +func (m *StreamError) String() string { return proto.CompactTextString(m) } +func (*StreamError) ProtoMessage() {} +func (*StreamError) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{0} } + +func (m *StreamError) GetGrpcCode() int32 { + if m != nil { + return m.GrpcCode + } + return 0 +} + +func (m *StreamError) GetHttpCode() int32 { + if m != nil { + return m.HttpCode + } + return 0 +} + +func (m *StreamError) GetMessage() string { + if m != nil { + return m.Message + } + return "" +} + +func (m *StreamError) GetHttpStatus() string { + if m != nil { + return m.HttpStatus + } + return "" +} + +func init() { + proto.RegisterType((*StreamError)(nil), "grpc.gateway.runtime.StreamError") +} + +func init() { proto.RegisterFile("runtime/internal/stream_chunk.proto", fileDescriptor0) } + +var fileDescriptor0 = []byte{ + // 181 bytes of a gzipped FileDescriptorProto + 0x1f, 0x8b, 0x08, 0x00, 0x00, 0x09, 0x6e, 0x88, 0x02, 0xff, 0x34, 0x8e, 0xbf, 0xee, 0x82, 0x30, + 0x14, 0x85, 0xd3, 0xdf, 0x1f, 0x85, 0xcb, 0x46, 0x1c, 0x9a, 0x38, 0x48, 0x74, 0x61, 0x82, 0xc1, + 0x37, 0xd0, 0xf8, 0x02, 0xb0, 0xb9, 0x90, 0x0a, 0x37, 0x40, 0x94, 0x96, 0xdc, 0x5e, 0x62, 0x5c, + 0x7d, 0x72, 0xd3, 0x22, 0xe3, 0xf9, 0xbe, 0x73, 0x92, 0x03, 0x07, 0x9a, 0x34, 0xf7, 0x03, 0xe6, + 0xbd, 0x66, 0x24, 0xad, 0x1e, 0xb9, 0x65, 0x42, 0x35, 0x54, 0x75, 0x37, 0xe9, 0x7b, 0x36, 0x92, + 0x61, 0x13, 0x6f, 0x5a, 0x1a, 0xeb, 0xac, 0x55, 0x8c, 0x4f, 0xf5, 0xca, 0xbe, 0x8b, 0xfd, 0x5b, + 0x40, 0x54, 0xfa, 0xf2, 0x85, 0xc8, 0x50, 0xbc, 0x85, 0xd0, 0xf5, 0xaa, 0xda, 0x34, 0x28, 0x45, + 0x22, 0xd2, 0xff, 0x22, 0x70, 0xe0, 0x6c, 0x1a, 0x74, 0xb2, 0x63, 0x1e, 0x67, 0xf9, 0x33, 0x4b, + 0x07, 0xbc, 0x94, 0xb0, 0x1e, 0xd0, 0x5a, 0xd5, 0xa2, 0xfc, 0x4d, 0x44, 0x1a, 0x16, 0x4b, 0x8c, + 0x77, 0x10, 0xf9, 0x99, 0x65, 0xc5, 0x93, 0x95, 0x7f, 0xde, 0x82, 0x43, 0xa5, 0x27, 0x27, 0xb8, + 0x06, 0xcb, 0xf3, 0xdb, 0xca, 0xbf, 0x3d, 0x7e, 0x02, 0x00, 0x00, 0xff, 0xff, 0xa9, 0x07, 0x92, + 0xb6, 0xd4, 0x00, 0x00, 0x00, +} diff --git a/vendor/github.com/grpc-ecosystem/grpc-gateway/runtime/marshal_json.go b/vendor/github.com/grpc-ecosystem/grpc-gateway/runtime/marshal_json.go new file mode 100644 index 0000000..0acd2ca --- /dev/null +++ b/vendor/github.com/grpc-ecosystem/grpc-gateway/runtime/marshal_json.go @@ -0,0 +1,37 @@ +package runtime + +import ( + "encoding/json" + "io" +) + +// JSONBuiltin is a Marshaler which marshals/unmarshals into/from JSON +// with the standard "encoding/json" package of Golang. +// Although it is generally faster for simple proto messages than JSONPb, +// it does not support advanced features of protobuf, e.g. map, oneof, .... +type JSONBuiltin struct{} + +// ContentType always Returns "application/json". +func (*JSONBuiltin) ContentType() string { + return "application/json" +} + +// Marshal marshals "v" into JSON +func (j *JSONBuiltin) Marshal(v interface{}) ([]byte, error) { + return json.Marshal(v) +} + +// Unmarshal unmarshals JSON data into "v". +func (j *JSONBuiltin) Unmarshal(data []byte, v interface{}) error { + return json.Unmarshal(data, v) +} + +// NewDecoder returns a Decoder which reads JSON stream from "r". +func (j *JSONBuiltin) NewDecoder(r io.Reader) Decoder { + return json.NewDecoder(r) +} + +// NewEncoder returns an Encoder which writes JSON stream into "w". +func (j *JSONBuiltin) NewEncoder(w io.Writer) Encoder { + return json.NewEncoder(w) +} diff --git a/vendor/github.com/grpc-ecosystem/grpc-gateway/runtime/marshal_jsonpb.go b/vendor/github.com/grpc-ecosystem/grpc-gateway/runtime/marshal_jsonpb.go new file mode 100644 index 0000000..49f13f7 --- /dev/null +++ b/vendor/github.com/grpc-ecosystem/grpc-gateway/runtime/marshal_jsonpb.go @@ -0,0 +1,184 @@ +package runtime + +import ( + "bytes" + "encoding/json" + "fmt" + "io" + "reflect" + + "github.com/golang/protobuf/jsonpb" + "github.com/golang/protobuf/proto" +) + +// JSONPb is a Marshaler which marshals/unmarshals into/from JSON +// with the "github.com/golang/protobuf/jsonpb". +// It supports fully functionality of protobuf unlike JSONBuiltin. +type JSONPb jsonpb.Marshaler + +// ContentType always returns "application/json". +func (*JSONPb) ContentType() string { + return "application/json" +} + +// Marshal marshals "v" into JSON +// Currently it can marshal only proto.Message. +// TODO(yugui) Support fields of primitive types in a message. +func (j *JSONPb) Marshal(v interface{}) ([]byte, error) { + if _, ok := v.(proto.Message); !ok { + return j.marshalNonProtoField(v) + } + + var buf bytes.Buffer + if err := j.marshalTo(&buf, v); err != nil { + return nil, err + } + return buf.Bytes(), nil +} + +func (j *JSONPb) marshalTo(w io.Writer, v interface{}) error { + p, ok := v.(proto.Message) + if !ok { + buf, err := j.marshalNonProtoField(v) + if err != nil { + return err + } + _, err = w.Write(buf) + return err + } + return (*jsonpb.Marshaler)(j).Marshal(w, p) +} + +// marshalNonProto marshals a non-message field of a protobuf message. +// This function does not correctly marshals arbitary data structure into JSON, +// but it is only capable of marshaling non-message field values of protobuf, +// i.e. primitive types, enums; pointers to primitives or enums; maps from +// integer/string types to primitives/enums/pointers to messages. +func (j *JSONPb) marshalNonProtoField(v interface{}) ([]byte, error) { + rv := reflect.ValueOf(v) + for rv.Kind() == reflect.Ptr { + if rv.IsNil() { + return []byte("null"), nil + } + rv = rv.Elem() + } + + if rv.Kind() == reflect.Map { + m := make(map[string]*json.RawMessage) + for _, k := range rv.MapKeys() { + buf, err := j.Marshal(rv.MapIndex(k).Interface()) + if err != nil { + return nil, err + } + m[fmt.Sprintf("%v", k.Interface())] = (*json.RawMessage)(&buf) + } + if j.Indent != "" { + return json.MarshalIndent(m, "", j.Indent) + } + return json.Marshal(m) + } + if enum, ok := rv.Interface().(protoEnum); ok && !j.EnumsAsInts { + return json.Marshal(enum.String()) + } + return json.Marshal(rv.Interface()) +} + +// Unmarshal unmarshals JSON "data" into "v" +// Currently it can marshal only proto.Message. +// TODO(yugui) Support fields of primitive types in a message. +func (j *JSONPb) Unmarshal(data []byte, v interface{}) error { + return unmarshalJSONPb(data, v) +} + +// NewDecoder returns a Decoder which reads JSON stream from "r". +func (j *JSONPb) NewDecoder(r io.Reader) Decoder { + d := json.NewDecoder(r) + return DecoderFunc(func(v interface{}) error { return decodeJSONPb(d, v) }) +} + +// NewEncoder returns an Encoder which writes JSON stream into "w". +func (j *JSONPb) NewEncoder(w io.Writer) Encoder { + return EncoderFunc(func(v interface{}) error { return j.marshalTo(w, v) }) +} + +func unmarshalJSONPb(data []byte, v interface{}) error { + d := json.NewDecoder(bytes.NewReader(data)) + return decodeJSONPb(d, v) +} + +func decodeJSONPb(d *json.Decoder, v interface{}) error { + p, ok := v.(proto.Message) + if !ok { + return decodeNonProtoField(d, v) + } + unmarshaler := &jsonpb.Unmarshaler{AllowUnknownFields: true} + return unmarshaler.UnmarshalNext(d, p) +} + +func decodeNonProtoField(d *json.Decoder, v interface{}) error { + rv := reflect.ValueOf(v) + if rv.Kind() != reflect.Ptr { + return fmt.Errorf("%T is not a pointer", v) + } + for rv.Kind() == reflect.Ptr { + if rv.IsNil() { + rv.Set(reflect.New(rv.Type().Elem())) + } + if rv.Type().ConvertibleTo(typeProtoMessage) { + unmarshaler := &jsonpb.Unmarshaler{AllowUnknownFields: true} + return unmarshaler.UnmarshalNext(d, rv.Interface().(proto.Message)) + } + rv = rv.Elem() + } + if rv.Kind() == reflect.Map { + if rv.IsNil() { + rv.Set(reflect.MakeMap(rv.Type())) + } + conv, ok := convFromType[rv.Type().Key().Kind()] + if !ok { + return fmt.Errorf("unsupported type of map field key: %v", rv.Type().Key()) + } + + m := make(map[string]*json.RawMessage) + if err := d.Decode(&m); err != nil { + return err + } + for k, v := range m { + result := conv.Call([]reflect.Value{reflect.ValueOf(k)}) + if err := result[1].Interface(); err != nil { + return err.(error) + } + bk := result[0] + bv := reflect.New(rv.Type().Elem()) + if err := unmarshalJSONPb([]byte(*v), bv.Interface()); err != nil { + return err + } + rv.SetMapIndex(bk, bv.Elem()) + } + return nil + } + if _, ok := rv.Interface().(protoEnum); ok { + var repr interface{} + if err := d.Decode(&repr); err != nil { + return err + } + switch repr.(type) { + case string: + // TODO(yugui) Should use proto.StructProperties? + return fmt.Errorf("unmarshaling of symbolic enum %q not supported: %T", repr, rv.Interface()) + case float64: + rv.Set(reflect.ValueOf(int32(repr.(float64))).Convert(rv.Type())) + return nil + default: + return fmt.Errorf("cannot assign %#v into Go type %T", repr, rv.Interface()) + } + } + return d.Decode(v) +} + +type protoEnum interface { + fmt.Stringer + EnumDescriptor() ([]byte, []int) +} + +var typeProtoMessage = reflect.TypeOf((*proto.Message)(nil)).Elem() diff --git a/vendor/github.com/grpc-ecosystem/grpc-gateway/runtime/marshaler.go b/vendor/github.com/grpc-ecosystem/grpc-gateway/runtime/marshaler.go new file mode 100644 index 0000000..6d434f1 --- /dev/null +++ b/vendor/github.com/grpc-ecosystem/grpc-gateway/runtime/marshaler.go @@ -0,0 +1,42 @@ +package runtime + +import ( + "io" +) + +// Marshaler defines a conversion between byte sequence and gRPC payloads / fields. +type Marshaler interface { + // Marshal marshals "v" into byte sequence. + Marshal(v interface{}) ([]byte, error) + // Unmarshal unmarshals "data" into "v". + // "v" must be a pointer value. + Unmarshal(data []byte, v interface{}) error + // NewDecoder returns a Decoder which reads byte sequence from "r". + NewDecoder(r io.Reader) Decoder + // NewEncoder returns an Encoder which writes bytes sequence into "w". + NewEncoder(w io.Writer) Encoder + // ContentType returns the Content-Type which this marshaler is responsible for. + ContentType() string +} + +// Decoder decodes a byte sequence +type Decoder interface { + Decode(v interface{}) error +} + +// Encoder encodes gRPC payloads / fields into byte sequence. +type Encoder interface { + Encode(v interface{}) error +} + +// DecoderFunc adapts an decoder function into Decoder. +type DecoderFunc func(v interface{}) error + +// Decode delegates invocations to the underlying function itself. +func (f DecoderFunc) Decode(v interface{}) error { return f(v) } + +// EncoderFunc adapts an encoder function into Encoder +type EncoderFunc func(v interface{}) error + +// Encode delegates invocations to the underlying function itself. +func (f EncoderFunc) Encode(v interface{}) error { return f(v) } diff --git a/vendor/github.com/grpc-ecosystem/grpc-gateway/runtime/marshaler_registry.go b/vendor/github.com/grpc-ecosystem/grpc-gateway/runtime/marshaler_registry.go new file mode 100644 index 0000000..928f073 --- /dev/null +++ b/vendor/github.com/grpc-ecosystem/grpc-gateway/runtime/marshaler_registry.go @@ -0,0 +1,91 @@ +package runtime + +import ( + "errors" + "net/http" +) + +// MIMEWildcard is the fallback MIME type used for requests which do not match +// a registered MIME type. +const MIMEWildcard = "*" + +var ( + acceptHeader = http.CanonicalHeaderKey("Accept") + contentTypeHeader = http.CanonicalHeaderKey("Content-Type") + + defaultMarshaler = &JSONPb{OrigName: true} +) + +// MarshalerForRequest returns the inbound/outbound marshalers for this request. +// It checks the registry on the ServeMux for the MIME type set by the Content-Type header. +// If it isn't set (or the request Content-Type is empty), checks for "*". +// If there are multiple Content-Type headers set, choose the first one that it can +// exactly match in the registry. +// Otherwise, it follows the above logic for "*"/InboundMarshaler/OutboundMarshaler. +func MarshalerForRequest(mux *ServeMux, r *http.Request) (inbound Marshaler, outbound Marshaler) { + for _, acceptVal := range r.Header[acceptHeader] { + if m, ok := mux.marshalers.mimeMap[acceptVal]; ok { + outbound = m + break + } + } + + for _, contentTypeVal := range r.Header[contentTypeHeader] { + if m, ok := mux.marshalers.mimeMap[contentTypeVal]; ok { + inbound = m + break + } + } + + if inbound == nil { + inbound = mux.marshalers.mimeMap[MIMEWildcard] + } + if outbound == nil { + outbound = inbound + } + + return inbound, outbound +} + +// marshalerRegistry is a mapping from MIME types to Marshalers. +type marshalerRegistry struct { + mimeMap map[string]Marshaler +} + +// add adds a marshaler for a case-sensitive MIME type string ("*" to match any +// MIME type). +func (m marshalerRegistry) add(mime string, marshaler Marshaler) error { + if len(mime) == 0 { + return errors.New("empty MIME type") + } + + m.mimeMap[mime] = marshaler + + return nil +} + +// makeMarshalerMIMERegistry returns a new registry of marshalers. +// It allows for a mapping of case-sensitive Content-Type MIME type string to runtime.Marshaler interfaces. +// +// For example, you could allow the client to specify the use of the runtime.JSONPb marshaler +// with a "applicaton/jsonpb" Content-Type and the use of the runtime.JSONBuiltin marshaler +// with a "application/json" Content-Type. +// "*" can be used to match any Content-Type. +// This can be attached to a ServerMux with the marshaler option. +func makeMarshalerMIMERegistry() marshalerRegistry { + return marshalerRegistry{ + mimeMap: map[string]Marshaler{ + MIMEWildcard: defaultMarshaler, + }, + } +} + +// WithMarshalerOption returns a ServeMuxOption which associates inbound and outbound +// Marshalers to a MIME type in mux. +func WithMarshalerOption(mime string, marshaler Marshaler) ServeMuxOption { + return func(mux *ServeMux) { + if err := mux.marshalers.add(mime, marshaler); err != nil { + panic(err) + } + } +} diff --git a/vendor/github.com/grpc-ecosystem/grpc-gateway/runtime/mux.go b/vendor/github.com/grpc-ecosystem/grpc-gateway/runtime/mux.go new file mode 100644 index 0000000..2e6c562 --- /dev/null +++ b/vendor/github.com/grpc-ecosystem/grpc-gateway/runtime/mux.go @@ -0,0 +1,132 @@ +package runtime + +import ( + "net/http" + "strings" + + "golang.org/x/net/context" + + "github.com/golang/protobuf/proto" +) + +// A HandlerFunc handles a specific pair of path pattern and HTTP method. +type HandlerFunc func(w http.ResponseWriter, r *http.Request, pathParams map[string]string) + +// ServeMux is a request multiplexer for grpc-gateway. +// It matches http requests to patterns and invokes the corresponding handler. +type ServeMux struct { + // handlers maps HTTP method to a list of handlers. + handlers map[string][]handler + forwardResponseOptions []func(context.Context, http.ResponseWriter, proto.Message) error + marshalers marshalerRegistry +} + +// ServeMuxOption is an option that can be given to a ServeMux on construction. +type ServeMuxOption func(*ServeMux) + +// WithForwardResponseOption returns a ServeMuxOption representing the forwardResponseOption. +// +// forwardResponseOption is an option that will be called on the relevant context.Context, +// http.ResponseWriter, and proto.Message before every forwarded response. +// +// The message may be nil in the case where just a header is being sent. +func WithForwardResponseOption(forwardResponseOption func(context.Context, http.ResponseWriter, proto.Message) error) ServeMuxOption { + return func(serveMux *ServeMux) { + serveMux.forwardResponseOptions = append(serveMux.forwardResponseOptions, forwardResponseOption) + } +} + +// NewServeMux returns a new ServeMux whose internal mapping is empty. +func NewServeMux(opts ...ServeMuxOption) *ServeMux { + serveMux := &ServeMux{ + handlers: make(map[string][]handler), + forwardResponseOptions: make([]func(context.Context, http.ResponseWriter, proto.Message) error, 0), + marshalers: makeMarshalerMIMERegistry(), + } + + for _, opt := range opts { + opt(serveMux) + } + return serveMux +} + +// Handle associates "h" to the pair of HTTP method and path pattern. +func (s *ServeMux) Handle(meth string, pat Pattern, h HandlerFunc) { + s.handlers[meth] = append(s.handlers[meth], handler{pat: pat, h: h}) +} + +// ServeHTTP dispatches the request to the first handler whose pattern matches to r.Method and r.Path. +func (s *ServeMux) ServeHTTP(w http.ResponseWriter, r *http.Request) { + path := r.URL.Path + if !strings.HasPrefix(path, "/") { + OtherErrorHandler(w, r, http.StatusText(http.StatusBadRequest), http.StatusBadRequest) + return + } + + components := strings.Split(path[1:], "/") + l := len(components) + var verb string + if idx := strings.LastIndex(components[l-1], ":"); idx == 0 { + OtherErrorHandler(w, r, http.StatusText(http.StatusNotFound), http.StatusNotFound) + return + } else if idx > 0 { + c := components[l-1] + components[l-1], verb = c[:idx], c[idx+1:] + } + + if override := r.Header.Get("X-HTTP-Method-Override"); override != "" && isPathLengthFallback(r) { + r.Method = strings.ToUpper(override) + if err := r.ParseForm(); err != nil { + OtherErrorHandler(w, r, err.Error(), http.StatusBadRequest) + return + } + } + for _, h := range s.handlers[r.Method] { + pathParams, err := h.pat.Match(components, verb) + if err != nil { + continue + } + h.h(w, r, pathParams) + return + } + + // lookup other methods to handle fallback from GET to POST and + // to determine if it is MethodNotAllowed or NotFound. + for m, handlers := range s.handlers { + if m == r.Method { + continue + } + for _, h := range handlers { + pathParams, err := h.pat.Match(components, verb) + if err != nil { + continue + } + // X-HTTP-Method-Override is optional. Always allow fallback to POST. + if isPathLengthFallback(r) { + if err := r.ParseForm(); err != nil { + OtherErrorHandler(w, r, err.Error(), http.StatusBadRequest) + return + } + h.h(w, r, pathParams) + return + } + OtherErrorHandler(w, r, http.StatusText(http.StatusMethodNotAllowed), http.StatusMethodNotAllowed) + return + } + } + OtherErrorHandler(w, r, http.StatusText(http.StatusNotFound), http.StatusNotFound) +} + +// GetForwardResponseOptions returns the ForwardResponseOptions associated with this ServeMux. +func (s *ServeMux) GetForwardResponseOptions() []func(context.Context, http.ResponseWriter, proto.Message) error { + return s.forwardResponseOptions +} + +func isPathLengthFallback(r *http.Request) bool { + return r.Method == "POST" && r.Header.Get("Content-Type") == "application/x-www-form-urlencoded" +} + +type handler struct { + pat Pattern + h HandlerFunc +} diff --git a/vendor/github.com/grpc-ecosystem/grpc-gateway/runtime/pattern.go b/vendor/github.com/grpc-ecosystem/grpc-gateway/runtime/pattern.go new file mode 100644 index 0000000..3947dbe --- /dev/null +++ b/vendor/github.com/grpc-ecosystem/grpc-gateway/runtime/pattern.go @@ -0,0 +1,227 @@ +package runtime + +import ( + "errors" + "fmt" + "strings" + + "github.com/grpc-ecosystem/grpc-gateway/utilities" + "google.golang.org/grpc/grpclog" +) + +var ( + // ErrNotMatch indicates that the given HTTP request path does not match to the pattern. + ErrNotMatch = errors.New("not match to the path pattern") + // ErrInvalidPattern indicates that the given definition of Pattern is not valid. + ErrInvalidPattern = errors.New("invalid pattern") +) + +type op struct { + code utilities.OpCode + operand int +} + +// Pattern is a template pattern of http request paths defined in third_party/googleapis/google/api/http.proto. +type Pattern struct { + // ops is a list of operations + ops []op + // pool is a constant pool indexed by the operands or vars. + pool []string + // vars is a list of variables names to be bound by this pattern + vars []string + // stacksize is the max depth of the stack + stacksize int + // tailLen is the length of the fixed-size segments after a deep wildcard + tailLen int + // verb is the VERB part of the path pattern. It is empty if the pattern does not have VERB part. + verb string +} + +// NewPattern returns a new Pattern from the given definition values. +// "ops" is a sequence of op codes. "pool" is a constant pool. +// "verb" is the verb part of the pattern. It is empty if the pattern does not have the part. +// "version" must be 1 for now. +// It returns an error if the given definition is invalid. +func NewPattern(version int, ops []int, pool []string, verb string) (Pattern, error) { + if version != 1 { + grpclog.Printf("unsupported version: %d", version) + return Pattern{}, ErrInvalidPattern + } + + l := len(ops) + if l%2 != 0 { + grpclog.Printf("odd number of ops codes: %d", l) + return Pattern{}, ErrInvalidPattern + } + + var ( + typedOps []op + stack, maxstack int + tailLen int + pushMSeen bool + vars []string + ) + for i := 0; i < l; i += 2 { + op := op{code: utilities.OpCode(ops[i]), operand: ops[i+1]} + switch op.code { + case utilities.OpNop: + continue + case utilities.OpPush: + if pushMSeen { + tailLen++ + } + stack++ + case utilities.OpPushM: + if pushMSeen { + grpclog.Printf("pushM appears twice") + return Pattern{}, ErrInvalidPattern + } + pushMSeen = true + stack++ + case utilities.OpLitPush: + if op.operand < 0 || len(pool) <= op.operand { + grpclog.Printf("negative literal index: %d", op.operand) + return Pattern{}, ErrInvalidPattern + } + if pushMSeen { + tailLen++ + } + stack++ + case utilities.OpConcatN: + if op.operand <= 0 { + grpclog.Printf("negative concat size: %d", op.operand) + return Pattern{}, ErrInvalidPattern + } + stack -= op.operand + if stack < 0 { + grpclog.Print("stack underflow") + return Pattern{}, ErrInvalidPattern + } + stack++ + case utilities.OpCapture: + if op.operand < 0 || len(pool) <= op.operand { + grpclog.Printf("variable name index out of bound: %d", op.operand) + return Pattern{}, ErrInvalidPattern + } + v := pool[op.operand] + op.operand = len(vars) + vars = append(vars, v) + stack-- + if stack < 0 { + grpclog.Printf("stack underflow") + return Pattern{}, ErrInvalidPattern + } + default: + grpclog.Printf("invalid opcode: %d", op.code) + return Pattern{}, ErrInvalidPattern + } + + if maxstack < stack { + maxstack = stack + } + typedOps = append(typedOps, op) + } + return Pattern{ + ops: typedOps, + pool: pool, + vars: vars, + stacksize: maxstack, + tailLen: tailLen, + verb: verb, + }, nil +} + +// MustPattern is a helper function which makes it easier to call NewPattern in variable initialization. +func MustPattern(p Pattern, err error) Pattern { + if err != nil { + grpclog.Fatalf("Pattern initialization failed: %v", err) + } + return p +} + +// Match examines components if it matches to the Pattern. +// If it matches, the function returns a mapping from field paths to their captured values. +// If otherwise, the function returns an error. +func (p Pattern) Match(components []string, verb string) (map[string]string, error) { + if p.verb != verb { + return nil, ErrNotMatch + } + + var pos int + stack := make([]string, 0, p.stacksize) + captured := make([]string, len(p.vars)) + l := len(components) + for _, op := range p.ops { + switch op.code { + case utilities.OpNop: + continue + case utilities.OpPush, utilities.OpLitPush: + if pos >= l { + return nil, ErrNotMatch + } + c := components[pos] + if op.code == utilities.OpLitPush { + if lit := p.pool[op.operand]; c != lit { + return nil, ErrNotMatch + } + } + stack = append(stack, c) + pos++ + case utilities.OpPushM: + end := len(components) + if end < pos+p.tailLen { + return nil, ErrNotMatch + } + end -= p.tailLen + stack = append(stack, strings.Join(components[pos:end], "/")) + pos = end + case utilities.OpConcatN: + n := op.operand + l := len(stack) - n + stack = append(stack[:l], strings.Join(stack[l:], "/")) + case utilities.OpCapture: + n := len(stack) - 1 + captured[op.operand] = stack[n] + stack = stack[:n] + } + } + if pos < l { + return nil, ErrNotMatch + } + bindings := make(map[string]string) + for i, val := range captured { + bindings[p.vars[i]] = val + } + return bindings, nil +} + +// Verb returns the verb part of the Pattern. +func (p Pattern) Verb() string { return p.verb } + +func (p Pattern) String() string { + var stack []string + for _, op := range p.ops { + switch op.code { + case utilities.OpNop: + continue + case utilities.OpPush: + stack = append(stack, "*") + case utilities.OpLitPush: + stack = append(stack, p.pool[op.operand]) + case utilities.OpPushM: + stack = append(stack, "**") + case utilities.OpConcatN: + n := op.operand + l := len(stack) - n + stack = append(stack[:l], strings.Join(stack[l:], "/")) + case utilities.OpCapture: + n := len(stack) - 1 + stack[n] = fmt.Sprintf("{%s=%s}", p.vars[op.operand], stack[n]) + } + } + segs := strings.Join(stack, "/") + if p.verb != "" { + return fmt.Sprintf("/%s:%s", segs, p.verb) + } + return "/" + segs +} diff --git a/vendor/github.com/grpc-ecosystem/grpc-gateway/runtime/proto2_convert.go b/vendor/github.com/grpc-ecosystem/grpc-gateway/runtime/proto2_convert.go new file mode 100644 index 0000000..a3151e2 --- /dev/null +++ b/vendor/github.com/grpc-ecosystem/grpc-gateway/runtime/proto2_convert.go @@ -0,0 +1,80 @@ +package runtime + +import ( + "github.com/golang/protobuf/proto" +) + +// StringP returns a pointer to a string whose pointee is same as the given string value. +func StringP(val string) (*string, error) { + return proto.String(val), nil +} + +// BoolP parses the given string representation of a boolean value, +// and returns a pointer to a bool whose value is same as the parsed value. +func BoolP(val string) (*bool, error) { + b, err := Bool(val) + if err != nil { + return nil, err + } + return proto.Bool(b), nil +} + +// Float64P parses the given string representation of a floating point number, +// and returns a pointer to a float64 whose value is same as the parsed number. +func Float64P(val string) (*float64, error) { + f, err := Float64(val) + if err != nil { + return nil, err + } + return proto.Float64(f), nil +} + +// Float32P parses the given string representation of a floating point number, +// and returns a pointer to a float32 whose value is same as the parsed number. +func Float32P(val string) (*float32, error) { + f, err := Float32(val) + if err != nil { + return nil, err + } + return proto.Float32(f), nil +} + +// Int64P parses the given string representation of an integer +// and returns a pointer to a int64 whose value is same as the parsed integer. +func Int64P(val string) (*int64, error) { + i, err := Int64(val) + if err != nil { + return nil, err + } + return proto.Int64(i), nil +} + +// Int32P parses the given string representation of an integer +// and returns a pointer to a int32 whose value is same as the parsed integer. +func Int32P(val string) (*int32, error) { + i, err := Int32(val) + if err != nil { + return nil, err + } + return proto.Int32(i), err +} + +// Uint64P parses the given string representation of an integer +// and returns a pointer to a uint64 whose value is same as the parsed integer. +func Uint64P(val string) (*uint64, error) { + i, err := Uint64(val) + if err != nil { + return nil, err + } + return proto.Uint64(i), err +} + +// Uint32P parses the given string representation of an integer +// and returns a pointer to a uint32 whose value is same as the parsed integer. +func Uint32P(val string) (*uint32, error) { + i, err := Uint32(val) + if err != nil { + return nil, err + } + return proto.Uint32(i), err +} diff --git a/vendor/github.com/grpc-ecosystem/grpc-gateway/runtime/query.go b/vendor/github.com/grpc-ecosystem/grpc-gateway/runtime/query.go new file mode 100644 index 0000000..c4b8148 --- /dev/null +++ b/vendor/github.com/grpc-ecosystem/grpc-gateway/runtime/query.go @@ -0,0 +1,164 @@ +package runtime + +import ( + "fmt" + "net/url" + "reflect" + "strings" + "time" + + "github.com/golang/protobuf/proto" + "github.com/grpc-ecosystem/grpc-gateway/utilities" + "google.golang.org/grpc/grpclog" +) + +// PopulateQueryParameters populates "values" into "msg". +// A value is ignored if its key starts with one of the elements in "filter". +func PopulateQueryParameters(msg proto.Message, values url.Values, filter *utilities.DoubleArray) error { + for key, values := range values { + fieldPath := strings.Split(key, ".") + if filter.HasCommonPrefix(fieldPath) { + continue + } + if err := populateFieldValueFromPath(msg, fieldPath, values); err != nil { + return err + } + } + return nil +} + +// PopulateFieldFromPath sets a value in a nested Protobuf structure. +// It instantiates missing protobuf fields as it goes. +func PopulateFieldFromPath(msg proto.Message, fieldPathString string, value string) error { + fieldPath := strings.Split(fieldPathString, ".") + return populateFieldValueFromPath(msg, fieldPath, []string{value}) +} + +func populateFieldValueFromPath(msg proto.Message, fieldPath []string, values []string) error { + m := reflect.ValueOf(msg) + if m.Kind() != reflect.Ptr { + return fmt.Errorf("unexpected type %T: %v", msg, msg) + } + m = m.Elem() + for i, fieldName := range fieldPath { + isLast := i == len(fieldPath)-1 + if !isLast && m.Kind() != reflect.Struct { + return fmt.Errorf("non-aggregate type in the mid of path: %s", strings.Join(fieldPath, ".")) + } + f := fieldByProtoName(m, fieldName) + if !f.IsValid() { + grpclog.Printf("field not found in %T: %s", msg, strings.Join(fieldPath, ".")) + return nil + } + + switch f.Kind() { + case reflect.Bool, reflect.Float32, reflect.Float64, reflect.Int32, reflect.Int64, reflect.String, reflect.Uint32, reflect.Uint64: + m = f + case reflect.Slice: + // TODO(yugui) Support []byte + if !isLast { + return fmt.Errorf("unexpected repeated field in %s", strings.Join(fieldPath, ".")) + } + return populateRepeatedField(f, values) + case reflect.Ptr: + if f.IsNil() { + m = reflect.New(f.Type().Elem()) + f.Set(m.Convert(f.Type())) + } + m = f.Elem() + continue + case reflect.Struct: + m = f + continue + default: + return fmt.Errorf("unexpected type %s in %T", f.Type(), msg) + } + } + switch len(values) { + case 0: + return fmt.Errorf("no value of field: %s", strings.Join(fieldPath, ".")) + case 1: + default: + grpclog.Printf("too many field values: %s", strings.Join(fieldPath, ".")) + } + return populateField(m, values[0]) +} + +// fieldByProtoName looks up a field whose corresponding protobuf field name is "name". +// "m" must be a struct value. It returns zero reflect.Value if no such field found. +func fieldByProtoName(m reflect.Value, name string) reflect.Value { + props := proto.GetProperties(m.Type()) + for _, p := range props.Prop { + if p.OrigName == name { + return m.FieldByName(p.Name) + } + } + return reflect.Value{} +} + +func populateRepeatedField(f reflect.Value, values []string) error { + elemType := f.Type().Elem() + conv, ok := convFromType[elemType.Kind()] + if !ok { + return fmt.Errorf("unsupported field type %s", elemType) + } + f.Set(reflect.MakeSlice(f.Type(), len(values), len(values)).Convert(f.Type())) + for i, v := range values { + result := conv.Call([]reflect.Value{reflect.ValueOf(v)}) + if err := result[1].Interface(); err != nil { + return err.(error) + } + f.Index(i).Set(result[0].Convert(f.Index(i).Type())) + } + return nil +} + +func populateField(f reflect.Value, value string) error { + // Handle well known type + type wkt interface { + XXX_WellKnownType() string + } + if wkt, ok := f.Addr().Interface().(wkt); ok { + switch wkt.XXX_WellKnownType() { + case "Timestamp": + if value == "null" { + f.Field(0).SetInt(0) + f.Field(1).SetInt(0) + return nil + } + + t, err := time.Parse(time.RFC3339Nano, value) + if err != nil { + return fmt.Errorf("bad Timestamp: %v", err) + } + f.Field(0).SetInt(int64(t.Unix())) + f.Field(1).SetInt(int64(t.Nanosecond())) + return nil + } + } + + conv, ok := convFromType[f.Kind()] + if !ok { + return fmt.Errorf("unsupported field type %T", f) + } + result := conv.Call([]reflect.Value{reflect.ValueOf(value)}) + if err := result[1].Interface(); err != nil { + return err.(error) + } + f.Set(result[0].Convert(f.Type())) + return nil +} + +var ( + convFromType = map[reflect.Kind]reflect.Value{ + reflect.String: reflect.ValueOf(String), + reflect.Bool: reflect.ValueOf(Bool), + reflect.Float64: reflect.ValueOf(Float64), + reflect.Float32: reflect.ValueOf(Float32), + reflect.Int64: reflect.ValueOf(Int64), + reflect.Int32: reflect.ValueOf(Int32), + reflect.Uint64: reflect.ValueOf(Uint64), + reflect.Uint32: reflect.ValueOf(Uint32), + // TODO(yugui) Support []byte + } +) diff --git a/vendor/github.com/grpc-ecosystem/grpc-gateway/third_party/googleapis/google/api/annotations.pb.go b/vendor/github.com/grpc-ecosystem/grpc-gateway/third_party/googleapis/google/api/annotations.pb.go new file mode 100644 index 0000000..98366b5 --- /dev/null +++ b/vendor/github.com/grpc-ecosystem/grpc-gateway/third_party/googleapis/google/api/annotations.pb.go @@ -0,0 +1,62 @@ +// Code generated by protoc-gen-go. +// source: google/api/annotations.proto +// DO NOT EDIT! + +/* +Package google_api is a generated protocol buffer package. + +It is generated from these files: + google/api/annotations.proto + google/api/http.proto + +It has these top-level messages: + HttpRule + CustomHttpPattern +*/ +package google_api + +import proto "github.com/golang/protobuf/proto" +import fmt "fmt" +import math "math" +import google_protobuf "github.com/golang/protobuf/protoc-gen-go/descriptor" + +// Reference imports to suppress errors if they are not otherwise used. +var _ = proto.Marshal +var _ = fmt.Errorf +var _ = math.Inf + +// This is a compile-time assertion to ensure that this generated file +// is compatible with the proto package it is being compiled against. +// A compilation error at this line likely means your copy of the +// proto package needs to be updated. +const _ = proto.ProtoPackageIsVersion2 // please upgrade the proto package + +var E_Http = &proto.ExtensionDesc{ + ExtendedType: (*google_protobuf.MethodOptions)(nil), + ExtensionType: (*HttpRule)(nil), + Field: 72295728, + Name: "google.api.http", + Tag: "bytes,72295728,opt,name=http", + Filename: "google/api/annotations.proto", +} + +func init() { + proto.RegisterExtension(E_Http) +} + +func init() { proto.RegisterFile("google/api/annotations.proto", fileDescriptor0) } + +var fileDescriptor0 = []byte{ + // 169 bytes of a gzipped FileDescriptorProto + 0x1f, 0x8b, 0x08, 0x00, 0x00, 0x09, 0x6e, 0x88, 0x02, 0xff, 0xe2, 0x92, 0x49, 0xcf, 0xcf, 0x4f, + 0xcf, 0x49, 0xd5, 0x4f, 0x2c, 0xc8, 0xd4, 0x4f, 0xcc, 0xcb, 0xcb, 0x2f, 0x49, 0x2c, 0xc9, 0xcc, + 0xcf, 0x2b, 0xd6, 0x2b, 0x28, 0xca, 0x2f, 0xc9, 0x17, 0xe2, 0x82, 0xc8, 0xea, 0x25, 0x16, 0x64, + 0x4a, 0x89, 0x22, 0xa9, 0xcc, 0x28, 0x29, 0x29, 0x80, 0x28, 0x91, 0x52, 0x80, 0x0a, 0x83, 0x79, + 0x49, 0xa5, 0x69, 0xfa, 0x29, 0xa9, 0xc5, 0xc9, 0x45, 0x99, 0x05, 0x25, 0xf9, 0x45, 0x10, 0x15, + 0x56, 0xde, 0x5c, 0x2c, 0x20, 0xf5, 0x42, 0x72, 0x7a, 0x50, 0xd3, 0x60, 0x4a, 0xf5, 0x7c, 0x53, + 0x4b, 0x32, 0xf2, 0x53, 0xfc, 0x0b, 0xc0, 0x56, 0x4a, 0x6c, 0x38, 0xb5, 0x47, 0x49, 0x81, 0x51, + 0x83, 0xdb, 0x48, 0x44, 0x0f, 0x61, 0xad, 0x9e, 0x47, 0x49, 0x49, 0x41, 0x50, 0x69, 0x4e, 0x6a, + 0x10, 0xd8, 0x10, 0x27, 0x15, 0x2e, 0xbe, 0xe4, 0xfc, 0x5c, 0x24, 0x05, 0x4e, 0x02, 0x8e, 0x08, + 0x67, 0x07, 0x80, 0x4c, 0x0e, 0x60, 0x4c, 0x62, 0x03, 0x5b, 0x61, 0x0c, 0x08, 0x00, 0x00, 0xff, + 0xff, 0x4f, 0xd1, 0x89, 0x83, 0xde, 0x00, 0x00, 0x00, +} diff --git a/vendor/github.com/grpc-ecosystem/grpc-gateway/third_party/googleapis/google/api/http.pb.go b/vendor/github.com/grpc-ecosystem/grpc-gateway/third_party/googleapis/google/api/http.pb.go new file mode 100644 index 0000000..82e742c --- /dev/null +++ b/vendor/github.com/grpc-ecosystem/grpc-gateway/third_party/googleapis/google/api/http.pb.go @@ -0,0 +1,381 @@ +// Code generated by protoc-gen-go. +// source: google/api/http.proto +// DO NOT EDIT! + +package google_api + +import proto "github.com/golang/protobuf/proto" +import fmt "fmt" +import math "math" + +// Reference imports to suppress errors if they are not otherwise used. +var _ = proto.Marshal +var _ = fmt.Errorf +var _ = math.Inf + +// `HttpRule` defines the mapping of an RPC method to one or more HTTP REST API +// methods. The mapping determines what portions of the request message are +// populated from the path, query parameters, or body of the HTTP request. The +// mapping is typically specified as an `google.api.http` annotation, see +// "google/api/annotations.proto" for details. +// +// The mapping consists of a mandatory field specifying a path template and an +// optional `body` field specifying what data is represented in the HTTP request +// body. The field name for the path indicates the HTTP method. Example: +// +// ``` +// package google.storage.v2; +// +// import "google/api/annotations.proto"; +// +// service Storage { +// rpc CreateObject(CreateObjectRequest) returns (Object) { +// option (google.api.http) { +// post: "/v2/{bucket_name=buckets/*}/objects" +// body: "object" +// }; +// }; +// } +// ``` +// +// Here `bucket_name` and `object` bind to fields of the request message +// `CreateObjectRequest`. +// +// The rules for mapping HTTP path, query parameters, and body fields +// to the request message are as follows: +// +// 1. The `body` field specifies either `*` or a field path, or is +// omitted. If omitted, it assumes there is no HTTP body. +// 2. Leaf fields (recursive expansion of nested messages in the +// request) can be classified into three types: +// (a) Matched in the URL template. +// (b) Covered by body (if body is `*`, everything except (a) fields; +// else everything under the body field) +// (c) All other fields. +// 3. URL query parameters found in the HTTP request are mapped to (c) fields. +// 4. Any body sent with an HTTP request can contain only (b) fields. +// +// The syntax of the path template is as follows: +// +// Template = "/" Segments [ Verb ] ; +// Segments = Segment { "/" Segment } ; +// Segment = "*" | "**" | LITERAL | Variable ; +// Variable = "{" FieldPath [ "=" Segments ] "}" ; +// FieldPath = IDENT { "." IDENT } ; +// Verb = ":" LITERAL ; +// +// `*` matches a single path component, `**` zero or more path components, and +// `LITERAL` a constant. A `Variable` can match an entire path as specified +// again by a template; this nested template must not contain further variables. +// If no template is given with a variable, it matches a single path component. +// The notation `{var}` is henceforth equivalent to `{var=*}`. +// +// Use CustomHttpPattern to specify any HTTP method that is not included in the +// pattern field, such as HEAD, or "*" to leave the HTTP method unspecified for +// a given URL path rule. The wild-card rule is useful for services that provide +// content to Web (HTML) clients. +type HttpRule struct { + // Determines the URL pattern is matched by this rules. This pattern can be + // used with any of the {get|put|post|delete|patch} methods. A custom method + // can be defined using the 'custom' field. + // + // Types that are valid to be assigned to Pattern: + // *HttpRule_Get + // *HttpRule_Put + // *HttpRule_Post + // *HttpRule_Delete + // *HttpRule_Patch + // *HttpRule_Custom + Pattern isHttpRule_Pattern `protobuf_oneof:"pattern"` + // The name of the request field whose value is mapped to the HTTP body, or + // `*` for mapping all fields not captured by the path pattern to the HTTP + // body. + Body string `protobuf:"bytes,7,opt,name=body" json:"body,omitempty"` + // Additional HTTP bindings for the selector. Nested bindings must not + // specify a selector and must not contain additional bindings. + AdditionalBindings []*HttpRule `protobuf:"bytes,11,rep,name=additional_bindings,json=additionalBindings" json:"additional_bindings,omitempty"` +} + +func (m *HttpRule) Reset() { *m = HttpRule{} } +func (m *HttpRule) String() string { return proto.CompactTextString(m) } +func (*HttpRule) ProtoMessage() {} +func (*HttpRule) Descriptor() ([]byte, []int) { return fileDescriptor1, []int{0} } + +type isHttpRule_Pattern interface { + isHttpRule_Pattern() +} + +type HttpRule_Get struct { + Get string `protobuf:"bytes,2,opt,name=get,oneof"` +} +type HttpRule_Put struct { + Put string `protobuf:"bytes,3,opt,name=put,oneof"` +} +type HttpRule_Post struct { + Post string `protobuf:"bytes,4,opt,name=post,oneof"` +} +type HttpRule_Delete struct { + Delete string `protobuf:"bytes,5,opt,name=delete,oneof"` +} +type HttpRule_Patch struct { + Patch string `protobuf:"bytes,6,opt,name=patch,oneof"` +} +type HttpRule_Custom struct { + Custom *CustomHttpPattern `protobuf:"bytes,8,opt,name=custom,oneof"` +} + +func (*HttpRule_Get) isHttpRule_Pattern() {} +func (*HttpRule_Put) isHttpRule_Pattern() {} +func (*HttpRule_Post) isHttpRule_Pattern() {} +func (*HttpRule_Delete) isHttpRule_Pattern() {} +func (*HttpRule_Patch) isHttpRule_Pattern() {} +func (*HttpRule_Custom) isHttpRule_Pattern() {} + +func (m *HttpRule) GetPattern() isHttpRule_Pattern { + if m != nil { + return m.Pattern + } + return nil +} + +func (m *HttpRule) GetGet() string { + if x, ok := m.GetPattern().(*HttpRule_Get); ok { + return x.Get + } + return "" +} + +func (m *HttpRule) GetPut() string { + if x, ok := m.GetPattern().(*HttpRule_Put); ok { + return x.Put + } + return "" +} + +func (m *HttpRule) GetPost() string { + if x, ok := m.GetPattern().(*HttpRule_Post); ok { + return x.Post + } + return "" +} + +func (m *HttpRule) GetDelete() string { + if x, ok := m.GetPattern().(*HttpRule_Delete); ok { + return x.Delete + } + return "" +} + +func (m *HttpRule) GetPatch() string { + if x, ok := m.GetPattern().(*HttpRule_Patch); ok { + return x.Patch + } + return "" +} + +func (m *HttpRule) GetCustom() *CustomHttpPattern { + if x, ok := m.GetPattern().(*HttpRule_Custom); ok { + return x.Custom + } + return nil +} + +func (m *HttpRule) GetBody() string { + if m != nil { + return m.Body + } + return "" +} + +func (m *HttpRule) GetAdditionalBindings() []*HttpRule { + if m != nil { + return m.AdditionalBindings + } + return nil +} + +// XXX_OneofFuncs is for the internal use of the proto package. +func (*HttpRule) XXX_OneofFuncs() (func(msg proto.Message, b *proto.Buffer) error, func(msg proto.Message, tag, wire int, b *proto.Buffer) (bool, error), func(msg proto.Message) (n int), []interface{}) { + return _HttpRule_OneofMarshaler, _HttpRule_OneofUnmarshaler, _HttpRule_OneofSizer, []interface{}{ + (*HttpRule_Get)(nil), + (*HttpRule_Put)(nil), + (*HttpRule_Post)(nil), + (*HttpRule_Delete)(nil), + (*HttpRule_Patch)(nil), + (*HttpRule_Custom)(nil), + } +} + +func _HttpRule_OneofMarshaler(msg proto.Message, b *proto.Buffer) error { + m := msg.(*HttpRule) + // pattern + switch x := m.Pattern.(type) { + case *HttpRule_Get: + b.EncodeVarint(2<<3 | proto.WireBytes) + b.EncodeStringBytes(x.Get) + case *HttpRule_Put: + b.EncodeVarint(3<<3 | proto.WireBytes) + b.EncodeStringBytes(x.Put) + case *HttpRule_Post: + b.EncodeVarint(4<<3 | proto.WireBytes) + b.EncodeStringBytes(x.Post) + case *HttpRule_Delete: + b.EncodeVarint(5<<3 | proto.WireBytes) + b.EncodeStringBytes(x.Delete) + case *HttpRule_Patch: + b.EncodeVarint(6<<3 | proto.WireBytes) + b.EncodeStringBytes(x.Patch) + case *HttpRule_Custom: + b.EncodeVarint(8<<3 | proto.WireBytes) + if err := b.EncodeMessage(x.Custom); err != nil { + return err + } + case nil: + default: + return fmt.Errorf("HttpRule.Pattern has unexpected type %T", x) + } + return nil +} + +func _HttpRule_OneofUnmarshaler(msg proto.Message, tag, wire int, b *proto.Buffer) (bool, error) { + m := msg.(*HttpRule) + switch tag { + case 2: // pattern.get + if wire != proto.WireBytes { + return true, proto.ErrInternalBadWireType + } + x, err := b.DecodeStringBytes() + m.Pattern = &HttpRule_Get{x} + return true, err + case 3: // pattern.put + if wire != proto.WireBytes { + return true, proto.ErrInternalBadWireType + } + x, err := b.DecodeStringBytes() + m.Pattern = &HttpRule_Put{x} + return true, err + case 4: // pattern.post + if wire != proto.WireBytes { + return true, proto.ErrInternalBadWireType + } + x, err := b.DecodeStringBytes() + m.Pattern = &HttpRule_Post{x} + return true, err + case 5: // pattern.delete + if wire != proto.WireBytes { + return true, proto.ErrInternalBadWireType + } + x, err := b.DecodeStringBytes() + m.Pattern = &HttpRule_Delete{x} + return true, err + case 6: // pattern.patch + if wire != proto.WireBytes { + return true, proto.ErrInternalBadWireType + } + x, err := b.DecodeStringBytes() + m.Pattern = &HttpRule_Patch{x} + return true, err + case 8: // pattern.custom + if wire != proto.WireBytes { + return true, proto.ErrInternalBadWireType + } + msg := new(CustomHttpPattern) + err := b.DecodeMessage(msg) + m.Pattern = &HttpRule_Custom{msg} + return true, err + default: + return false, nil + } +} + +func _HttpRule_OneofSizer(msg proto.Message) (n int) { + m := msg.(*HttpRule) + // pattern + switch x := m.Pattern.(type) { + case *HttpRule_Get: + n += proto.SizeVarint(2<<3 | proto.WireBytes) + n += proto.SizeVarint(uint64(len(x.Get))) + n += len(x.Get) + case *HttpRule_Put: + n += proto.SizeVarint(3<<3 | proto.WireBytes) + n += proto.SizeVarint(uint64(len(x.Put))) + n += len(x.Put) + case *HttpRule_Post: + n += proto.SizeVarint(4<<3 | proto.WireBytes) + n += proto.SizeVarint(uint64(len(x.Post))) + n += len(x.Post) + case *HttpRule_Delete: + n += proto.SizeVarint(5<<3 | proto.WireBytes) + n += proto.SizeVarint(uint64(len(x.Delete))) + n += len(x.Delete) + case *HttpRule_Patch: + n += proto.SizeVarint(6<<3 | proto.WireBytes) + n += proto.SizeVarint(uint64(len(x.Patch))) + n += len(x.Patch) + case *HttpRule_Custom: + s := proto.Size(x.Custom) + n += proto.SizeVarint(8<<3 | proto.WireBytes) + n += proto.SizeVarint(uint64(s)) + n += s + case nil: + default: + panic(fmt.Sprintf("proto: unexpected type %T in oneof", x)) + } + return n +} + +// A custom pattern is used for defining custom HTTP verb. +type CustomHttpPattern struct { + // The name of this custom HTTP verb. + Kind string `protobuf:"bytes,1,opt,name=kind" json:"kind,omitempty"` + // The path matched by this custom verb. + Path string `protobuf:"bytes,2,opt,name=path" json:"path,omitempty"` +} + +func (m *CustomHttpPattern) Reset() { *m = CustomHttpPattern{} } +func (m *CustomHttpPattern) String() string { return proto.CompactTextString(m) } +func (*CustomHttpPattern) ProtoMessage() {} +func (*CustomHttpPattern) Descriptor() ([]byte, []int) { return fileDescriptor1, []int{1} } + +func (m *CustomHttpPattern) GetKind() string { + if m != nil { + return m.Kind + } + return "" +} + +func (m *CustomHttpPattern) GetPath() string { + if m != nil { + return m.Path + } + return "" +} + +func init() { + proto.RegisterType((*HttpRule)(nil), "google.api.HttpRule") + proto.RegisterType((*CustomHttpPattern)(nil), "google.api.CustomHttpPattern") +} + +func init() { proto.RegisterFile("google/api/http.proto", fileDescriptor1) } + +var fileDescriptor1 = []byte{ + // 280 bytes of a gzipped FileDescriptorProto + 0x1f, 0x8b, 0x08, 0x00, 0x00, 0x09, 0x6e, 0x88, 0x02, 0xff, 0x64, 0x91, 0xc1, 0x6a, 0xbb, 0x40, + 0x10, 0xc6, 0xff, 0x46, 0x63, 0xe2, 0x08, 0x7f, 0xe8, 0x36, 0x2d, 0x7b, 0x09, 0x48, 0x4e, 0x9e, + 0x0c, 0xa4, 0x87, 0x1e, 0x7a, 0xb3, 0x14, 0x72, 0x0c, 0xbe, 0x40, 0x59, 0xdd, 0x45, 0x97, 0x1a, + 0x77, 0x88, 0xe3, 0xa1, 0x8f, 0xd2, 0xb7, 0x2d, 0xbb, 0x6b, 0x48, 0xa0, 0xb7, 0xf9, 0x7e, 0x33, + 0x7e, 0xdf, 0xb8, 0x03, 0x4f, 0xad, 0x31, 0x6d, 0xaf, 0xf6, 0x02, 0xf5, 0xbe, 0x23, 0xc2, 0x02, + 0x2f, 0x86, 0x0c, 0x03, 0x8f, 0x0b, 0x81, 0x7a, 0xf7, 0xb3, 0x80, 0xf5, 0x91, 0x08, 0xab, 0xa9, + 0x57, 0x8c, 0x41, 0xd8, 0x2a, 0xe2, 0x8b, 0x2c, 0xc8, 0x93, 0xe3, 0xbf, 0xca, 0x0a, 0xcb, 0x70, + 0x22, 0x1e, 0x5e, 0x19, 0x4e, 0xc4, 0x36, 0x10, 0xa1, 0x19, 0x89, 0x47, 0x33, 0x74, 0x8a, 0x71, + 0x88, 0xa5, 0xea, 0x15, 0x29, 0xbe, 0x9c, 0xf9, 0xac, 0xd9, 0x33, 0x2c, 0x51, 0x50, 0xd3, 0xf1, + 0x78, 0x6e, 0x78, 0xc9, 0x5e, 0x21, 0x6e, 0xa6, 0x91, 0xcc, 0x99, 0xaf, 0xb3, 0x20, 0x4f, 0x0f, + 0xdb, 0xe2, 0xb6, 0x59, 0xf1, 0xee, 0x3a, 0x76, 0xb7, 0x93, 0x20, 0x52, 0x97, 0xc1, 0x1a, 0xfa, + 0x71, 0xc6, 0x20, 0xaa, 0x8d, 0xfc, 0xe6, 0x2b, 0xeb, 0x57, 0xb9, 0x9a, 0x7d, 0xc0, 0xa3, 0x90, + 0x52, 0x93, 0x36, 0x83, 0xe8, 0x3f, 0x6b, 0x3d, 0x48, 0x3d, 0xb4, 0x23, 0x4f, 0xb3, 0x30, 0x4f, + 0x0f, 0x9b, 0x7b, 0xe7, 0xeb, 0xff, 0x56, 0xec, 0xf6, 0x41, 0x39, 0xcf, 0x97, 0x09, 0xac, 0xd0, + 0xe7, 0xed, 0xde, 0xe0, 0xe1, 0xcf, 0x12, 0x36, 0xfa, 0x4b, 0x0f, 0x92, 0x07, 0x3e, 0xda, 0xd6, + 0x96, 0xa1, 0xa0, 0xce, 0x3f, 0x5c, 0xe5, 0xea, 0x72, 0x0b, 0xff, 0x1b, 0x73, 0xbe, 0x8b, 0x2d, + 0x13, 0x67, 0x63, 0x2f, 0x70, 0x0a, 0xea, 0xd8, 0x9d, 0xe2, 0xe5, 0x37, 0x00, 0x00, 0xff, 0xff, + 0x2f, 0x89, 0x57, 0x7f, 0xa3, 0x01, 0x00, 0x00, +} diff --git a/vendor/github.com/grpc-ecosystem/grpc-gateway/utilities/doc.go b/vendor/github.com/grpc-ecosystem/grpc-gateway/utilities/doc.go new file mode 100644 index 0000000..cf79a4d --- /dev/null +++ b/vendor/github.com/grpc-ecosystem/grpc-gateway/utilities/doc.go @@ -0,0 +1,2 @@ +// Package utilities provides members for internal use in grpc-gateway. +package utilities diff --git a/vendor/github.com/grpc-ecosystem/grpc-gateway/utilities/pattern.go b/vendor/github.com/grpc-ecosystem/grpc-gateway/utilities/pattern.go new file mode 100644 index 0000000..28ad946 --- /dev/null +++ b/vendor/github.com/grpc-ecosystem/grpc-gateway/utilities/pattern.go @@ -0,0 +1,22 @@ +package utilities + +// An OpCode is a opcode of compiled path patterns. +type OpCode int + +// These constants are the valid values of OpCode. +const ( + // OpNop does nothing + OpNop = OpCode(iota) + // OpPush pushes a component to stack + OpPush + // OpLitPush pushes a component to stack if it matches to the literal + OpLitPush + // OpPushM concatenates the remaining components and pushes it to stack + OpPushM + // OpConcatN pops N items from stack, concatenates them and pushes it back to stack + OpConcatN + // OpCapture pops an item and binds it to the variable + OpCapture + // OpEnd is the least postive invalid opcode. + OpEnd +) diff --git a/vendor/github.com/grpc-ecosystem/grpc-gateway/utilities/trie.go b/vendor/github.com/grpc-ecosystem/grpc-gateway/utilities/trie.go new file mode 100644 index 0000000..c2b7b30 --- /dev/null +++ b/vendor/github.com/grpc-ecosystem/grpc-gateway/utilities/trie.go @@ -0,0 +1,177 @@ +package utilities + +import ( + "sort" +) + +// DoubleArray is a Double Array implementation of trie on sequences of strings. +type DoubleArray struct { + // Encoding keeps an encoding from string to int + Encoding map[string]int + // Base is the base array of Double Array + Base []int + // Check is the check array of Double Array + Check []int +} + +// NewDoubleArray builds a DoubleArray from a set of sequences of strings. +func NewDoubleArray(seqs [][]string) *DoubleArray { + da := &DoubleArray{Encoding: make(map[string]int)} + if len(seqs) == 0 { + return da + } + + encoded := registerTokens(da, seqs) + sort.Sort(byLex(encoded)) + + root := node{row: -1, col: -1, left: 0, right: len(encoded)} + addSeqs(da, encoded, 0, root) + + for i := len(da.Base); i > 0; i-- { + if da.Check[i-1] != 0 { + da.Base = da.Base[:i] + da.Check = da.Check[:i] + break + } + } + return da +} + +func registerTokens(da *DoubleArray, seqs [][]string) [][]int { + var result [][]int + for _, seq := range seqs { + var encoded []int + for _, token := range seq { + if _, ok := da.Encoding[token]; !ok { + da.Encoding[token] = len(da.Encoding) + } + encoded = append(encoded, da.Encoding[token]) + } + result = append(result, encoded) + } + for i := range result { + result[i] = append(result[i], len(da.Encoding)) + } + return result +} + +type node struct { + row, col int + left, right int +} + +func (n node) value(seqs [][]int) int { + return seqs[n.row][n.col] +} + +func (n node) children(seqs [][]int) []*node { + var result []*node + lastVal := int(-1) + last := new(node) + for i := n.left; i < n.right; i++ { + if lastVal == seqs[i][n.col+1] { + continue + } + last.right = i + last = &node{ + row: i, + col: n.col + 1, + left: i, + } + result = append(result, last) + } + last.right = n.right + return result +} + +func addSeqs(da *DoubleArray, seqs [][]int, pos int, n node) { + ensureSize(da, pos) + + children := n.children(seqs) + var i int + for i = 1; ; i++ { + ok := func() bool { + for _, child := range children { + code := child.value(seqs) + j := i + code + ensureSize(da, j) + if da.Check[j] != 0 { + return false + } + } + return true + }() + if ok { + break + } + } + da.Base[pos] = i + for _, child := range children { + code := child.value(seqs) + j := i + code + da.Check[j] = pos + 1 + } + terminator := len(da.Encoding) + for _, child := range children { + code := child.value(seqs) + if code == terminator { + continue + } + j := i + code + addSeqs(da, seqs, j, *child) + } +} + +func ensureSize(da *DoubleArray, i int) { + for i >= len(da.Base) { + da.Base = append(da.Base, make([]int, len(da.Base)+1)...) + da.Check = append(da.Check, make([]int, len(da.Check)+1)...) + } +} + +type byLex [][]int + +func (l byLex) Len() int { return len(l) } +func (l byLex) Swap(i, j int) { l[i], l[j] = l[j], l[i] } +func (l byLex) Less(i, j int) bool { + si := l[i] + sj := l[j] + var k int + for k = 0; k < len(si) && k < len(sj); k++ { + if si[k] < sj[k] { + return true + } + if si[k] > sj[k] { + return false + } + } + if k < len(sj) { + return true + } + return false +} + +// HasCommonPrefix determines if any sequence in the DoubleArray is a prefix of the given sequence. +func (da *DoubleArray) HasCommonPrefix(seq []string) bool { + if len(da.Base) == 0 { + return false + } + + var i int + for _, t := range seq { + code, ok := da.Encoding[t] + if !ok { + break + } + j := da.Base[i] + code + if len(da.Check) <= j || da.Check[j] != i+1 { + break + } + i = j + } + j := da.Base[i] + len(da.Encoding) + if len(da.Check) <= j || da.Check[j] != i+1 { + return false + } + return true +} diff --git a/vendor/golang.org/x/net/http2/client_conn_pool.go b/vendor/golang.org/x/net/http2/client_conn_pool.go new file mode 100644 index 0000000..b139412 --- /dev/null +++ b/vendor/golang.org/x/net/http2/client_conn_pool.go @@ -0,0 +1,256 @@ +// Copyright 2015 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +// Transport code's client connection pooling. + +package http2 + +import ( + "crypto/tls" + "net/http" + "sync" +) + +// ClientConnPool manages a pool of HTTP/2 client connections. +type ClientConnPool interface { + GetClientConn(req *http.Request, addr string) (*ClientConn, error) + MarkDead(*ClientConn) +} + +// clientConnPoolIdleCloser is the interface implemented by ClientConnPool +// implementations which can close their idle connections. +type clientConnPoolIdleCloser interface { + ClientConnPool + closeIdleConnections() +} + +var ( + _ clientConnPoolIdleCloser = (*clientConnPool)(nil) + _ clientConnPoolIdleCloser = noDialClientConnPool{} +) + +// TODO: use singleflight for dialing and addConnCalls? +type clientConnPool struct { + t *Transport + + mu sync.Mutex // TODO: maybe switch to RWMutex + // TODO: add support for sharing conns based on cert names + // (e.g. share conn for googleapis.com and appspot.com) + conns map[string][]*ClientConn // key is host:port + dialing map[string]*dialCall // currently in-flight dials + keys map[*ClientConn][]string + addConnCalls map[string]*addConnCall // in-flight addConnIfNeede calls +} + +func (p *clientConnPool) GetClientConn(req *http.Request, addr string) (*ClientConn, error) { + return p.getClientConn(req, addr, dialOnMiss) +} + +const ( + dialOnMiss = true + noDialOnMiss = false +) + +func (p *clientConnPool) getClientConn(req *http.Request, addr string, dialOnMiss bool) (*ClientConn, error) { + if isConnectionCloseRequest(req) && dialOnMiss { + // It gets its own connection. + const singleUse = true + cc, err := p.t.dialClientConn(addr, singleUse) + if err != nil { + return nil, err + } + return cc, nil + } + p.mu.Lock() + for _, cc := range p.conns[addr] { + if cc.CanTakeNewRequest() { + p.mu.Unlock() + return cc, nil + } + } + if !dialOnMiss { + p.mu.Unlock() + return nil, ErrNoCachedConn + } + call := p.getStartDialLocked(addr) + p.mu.Unlock() + <-call.done + return call.res, call.err +} + +// dialCall is an in-flight Transport dial call to a host. +type dialCall struct { + p *clientConnPool + done chan struct{} // closed when done + res *ClientConn // valid after done is closed + err error // valid after done is closed +} + +// requires p.mu is held. +func (p *clientConnPool) getStartDialLocked(addr string) *dialCall { + if call, ok := p.dialing[addr]; ok { + // A dial is already in-flight. Don't start another. + return call + } + call := &dialCall{p: p, done: make(chan struct{})} + if p.dialing == nil { + p.dialing = make(map[string]*dialCall) + } + p.dialing[addr] = call + go call.dial(addr) + return call +} + +// run in its own goroutine. +func (c *dialCall) dial(addr string) { + const singleUse = false // shared conn + c.res, c.err = c.p.t.dialClientConn(addr, singleUse) + close(c.done) + + c.p.mu.Lock() + delete(c.p.dialing, addr) + if c.err == nil { + c.p.addConnLocked(addr, c.res) + } + c.p.mu.Unlock() +} + +// addConnIfNeeded makes a NewClientConn out of c if a connection for key doesn't +// already exist. It coalesces concurrent calls with the same key. +// This is used by the http1 Transport code when it creates a new connection. Because +// the http1 Transport doesn't de-dup TCP dials to outbound hosts (because it doesn't know +// the protocol), it can get into a situation where it has multiple TLS connections. +// This code decides which ones live or die. +// The return value used is whether c was used. +// c is never closed. +func (p *clientConnPool) addConnIfNeeded(key string, t *Transport, c *tls.Conn) (used bool, err error) { + p.mu.Lock() + for _, cc := range p.conns[key] { + if cc.CanTakeNewRequest() { + p.mu.Unlock() + return false, nil + } + } + call, dup := p.addConnCalls[key] + if !dup { + if p.addConnCalls == nil { + p.addConnCalls = make(map[string]*addConnCall) + } + call = &addConnCall{ + p: p, + done: make(chan struct{}), + } + p.addConnCalls[key] = call + go call.run(t, key, c) + } + p.mu.Unlock() + + <-call.done + if call.err != nil { + return false, call.err + } + return !dup, nil +} + +type addConnCall struct { + p *clientConnPool + done chan struct{} // closed when done + err error +} + +func (c *addConnCall) run(t *Transport, key string, tc *tls.Conn) { + cc, err := t.NewClientConn(tc) + + p := c.p + p.mu.Lock() + if err != nil { + c.err = err + } else { + p.addConnLocked(key, cc) + } + delete(p.addConnCalls, key) + p.mu.Unlock() + close(c.done) +} + +func (p *clientConnPool) addConn(key string, cc *ClientConn) { + p.mu.Lock() + p.addConnLocked(key, cc) + p.mu.Unlock() +} + +// p.mu must be held +func (p *clientConnPool) addConnLocked(key string, cc *ClientConn) { + for _, v := range p.conns[key] { + if v == cc { + return + } + } + if p.conns == nil { + p.conns = make(map[string][]*ClientConn) + } + if p.keys == nil { + p.keys = make(map[*ClientConn][]string) + } + p.conns[key] = append(p.conns[key], cc) + p.keys[cc] = append(p.keys[cc], key) +} + +func (p *clientConnPool) MarkDead(cc *ClientConn) { + p.mu.Lock() + defer p.mu.Unlock() + for _, key := range p.keys[cc] { + vv, ok := p.conns[key] + if !ok { + continue + } + newList := filterOutClientConn(vv, cc) + if len(newList) > 0 { + p.conns[key] = newList + } else { + delete(p.conns, key) + } + } + delete(p.keys, cc) +} + +func (p *clientConnPool) closeIdleConnections() { + p.mu.Lock() + defer p.mu.Unlock() + // TODO: don't close a cc if it was just added to the pool + // milliseconds ago and has never been used. There's currently + // a small race window with the HTTP/1 Transport's integration + // where it can add an idle conn just before using it, and + // somebody else can concurrently call CloseIdleConns and + // break some caller's RoundTrip. + for _, vv := range p.conns { + for _, cc := range vv { + cc.closeIfIdle() + } + } +} + +func filterOutClientConn(in []*ClientConn, exclude *ClientConn) []*ClientConn { + out := in[:0] + for _, v := range in { + if v != exclude { + out = append(out, v) + } + } + // If we filtered it out, zero out the last item to prevent + // the GC from seeing it. + if len(in) != len(out) { + in[len(in)-1] = nil + } + return out +} + +// noDialClientConnPool is an implementation of http2.ClientConnPool +// which never dials. We let the HTTP/1.1 client dial and use its TLS +// connection instead. +type noDialClientConnPool struct{ *clientConnPool } + +func (p noDialClientConnPool) GetClientConn(req *http.Request, addr string) (*ClientConn, error) { + return p.getClientConn(req, addr, noDialOnMiss) +} diff --git a/vendor/golang.org/x/net/http2/configure_transport.go b/vendor/golang.org/x/net/http2/configure_transport.go new file mode 100644 index 0000000..4f720f5 --- /dev/null +++ b/vendor/golang.org/x/net/http2/configure_transport.go @@ -0,0 +1,80 @@ +// Copyright 2015 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +// +build go1.6 + +package http2 + +import ( + "crypto/tls" + "fmt" + "net/http" +) + +func configureTransport(t1 *http.Transport) (*Transport, error) { + connPool := new(clientConnPool) + t2 := &Transport{ + ConnPool: noDialClientConnPool{connPool}, + t1: t1, + } + connPool.t = t2 + if err := registerHTTPSProtocol(t1, noDialH2RoundTripper{t2}); err != nil { + return nil, err + } + if t1.TLSClientConfig == nil { + t1.TLSClientConfig = new(tls.Config) + } + if !strSliceContains(t1.TLSClientConfig.NextProtos, "h2") { + t1.TLSClientConfig.NextProtos = append([]string{"h2"}, t1.TLSClientConfig.NextProtos...) + } + if !strSliceContains(t1.TLSClientConfig.NextProtos, "http/1.1") { + t1.TLSClientConfig.NextProtos = append(t1.TLSClientConfig.NextProtos, "http/1.1") + } + upgradeFn := func(authority string, c *tls.Conn) http.RoundTripper { + addr := authorityAddr("https", authority) + if used, err := connPool.addConnIfNeeded(addr, t2, c); err != nil { + go c.Close() + return erringRoundTripper{err} + } else if !used { + // Turns out we don't need this c. + // For example, two goroutines made requests to the same host + // at the same time, both kicking off TCP dials. (since protocol + // was unknown) + go c.Close() + } + return t2 + } + if m := t1.TLSNextProto; len(m) == 0 { + t1.TLSNextProto = map[string]func(string, *tls.Conn) http.RoundTripper{ + "h2": upgradeFn, + } + } else { + m["h2"] = upgradeFn + } + return t2, nil +} + +// registerHTTPSProtocol calls Transport.RegisterProtocol but +// convering panics into errors. +func registerHTTPSProtocol(t *http.Transport, rt http.RoundTripper) (err error) { + defer func() { + if e := recover(); e != nil { + err = fmt.Errorf("%v", e) + } + }() + t.RegisterProtocol("https", rt) + return nil +} + +// noDialH2RoundTripper is a RoundTripper which only tries to complete the request +// if there's already has a cached connection to the host. +type noDialH2RoundTripper struct{ t *Transport } + +func (rt noDialH2RoundTripper) RoundTrip(req *http.Request) (*http.Response, error) { + res, err := rt.t.RoundTrip(req) + if err == ErrNoCachedConn { + return nil, http.ErrSkipAltProtocol + } + return res, err +} diff --git a/vendor/golang.org/x/net/http2/errors.go b/vendor/golang.org/x/net/http2/errors.go new file mode 100644 index 0000000..20fd762 --- /dev/null +++ b/vendor/golang.org/x/net/http2/errors.go @@ -0,0 +1,130 @@ +// Copyright 2014 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package http2 + +import ( + "errors" + "fmt" +) + +// An ErrCode is an unsigned 32-bit error code as defined in the HTTP/2 spec. +type ErrCode uint32 + +const ( + ErrCodeNo ErrCode = 0x0 + ErrCodeProtocol ErrCode = 0x1 + ErrCodeInternal ErrCode = 0x2 + ErrCodeFlowControl ErrCode = 0x3 + ErrCodeSettingsTimeout ErrCode = 0x4 + ErrCodeStreamClosed ErrCode = 0x5 + ErrCodeFrameSize ErrCode = 0x6 + ErrCodeRefusedStream ErrCode = 0x7 + ErrCodeCancel ErrCode = 0x8 + ErrCodeCompression ErrCode = 0x9 + ErrCodeConnect ErrCode = 0xa + ErrCodeEnhanceYourCalm ErrCode = 0xb + ErrCodeInadequateSecurity ErrCode = 0xc + ErrCodeHTTP11Required ErrCode = 0xd +) + +var errCodeName = map[ErrCode]string{ + ErrCodeNo: "NO_ERROR", + ErrCodeProtocol: "PROTOCOL_ERROR", + ErrCodeInternal: "INTERNAL_ERROR", + ErrCodeFlowControl: "FLOW_CONTROL_ERROR", + ErrCodeSettingsTimeout: "SETTINGS_TIMEOUT", + ErrCodeStreamClosed: "STREAM_CLOSED", + ErrCodeFrameSize: "FRAME_SIZE_ERROR", + ErrCodeRefusedStream: "REFUSED_STREAM", + ErrCodeCancel: "CANCEL", + ErrCodeCompression: "COMPRESSION_ERROR", + ErrCodeConnect: "CONNECT_ERROR", + ErrCodeEnhanceYourCalm: "ENHANCE_YOUR_CALM", + ErrCodeInadequateSecurity: "INADEQUATE_SECURITY", + ErrCodeHTTP11Required: "HTTP_1_1_REQUIRED", +} + +func (e ErrCode) String() string { + if s, ok := errCodeName[e]; ok { + return s + } + return fmt.Sprintf("unknown error code 0x%x", uint32(e)) +} + +// ConnectionError is an error that results in the termination of the +// entire connection. +type ConnectionError ErrCode + +func (e ConnectionError) Error() string { return fmt.Sprintf("connection error: %s", ErrCode(e)) } + +// StreamError is an error that only affects one stream within an +// HTTP/2 connection. +type StreamError struct { + StreamID uint32 + Code ErrCode + Cause error // optional additional detail +} + +func streamError(id uint32, code ErrCode) StreamError { + return StreamError{StreamID: id, Code: code} +} + +func (e StreamError) Error() string { + if e.Cause != nil { + return fmt.Sprintf("stream error: stream ID %d; %v; %v", e.StreamID, e.Code, e.Cause) + } + return fmt.Sprintf("stream error: stream ID %d; %v", e.StreamID, e.Code) +} + +// 6.9.1 The Flow Control Window +// "If a sender receives a WINDOW_UPDATE that causes a flow control +// window to exceed this maximum it MUST terminate either the stream +// or the connection, as appropriate. For streams, [...]; for the +// connection, a GOAWAY frame with a FLOW_CONTROL_ERROR code." +type goAwayFlowError struct{} + +func (goAwayFlowError) Error() string { return "connection exceeded flow control window size" } + +// connErrorReason wraps a ConnectionError with an informative error about why it occurs. + +// Errors of this type are only returned by the frame parser functions +// and converted into ConnectionError(ErrCodeProtocol). +type connError struct { + Code ErrCode + Reason string +} + +func (e connError) Error() string { + return fmt.Sprintf("http2: connection error: %v: %v", e.Code, e.Reason) +} + +type pseudoHeaderError string + +func (e pseudoHeaderError) Error() string { + return fmt.Sprintf("invalid pseudo-header %q", string(e)) +} + +type duplicatePseudoHeaderError string + +func (e duplicatePseudoHeaderError) Error() string { + return fmt.Sprintf("duplicate pseudo-header %q", string(e)) +} + +type headerFieldNameError string + +func (e headerFieldNameError) Error() string { + return fmt.Sprintf("invalid header field name %q", string(e)) +} + +type headerFieldValueError string + +func (e headerFieldValueError) Error() string { + return fmt.Sprintf("invalid header field value %q", string(e)) +} + +var ( + errMixPseudoHeaderTypes = errors.New("mix of request and response pseudo headers") + errPseudoAfterRegular = errors.New("pseudo header field after regular") +) diff --git a/vendor/golang.org/x/net/http2/fixed_buffer.go b/vendor/golang.org/x/net/http2/fixed_buffer.go new file mode 100644 index 0000000..47da0f0 --- /dev/null +++ b/vendor/golang.org/x/net/http2/fixed_buffer.go @@ -0,0 +1,60 @@ +// Copyright 2014 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package http2 + +import ( + "errors" +) + +// fixedBuffer is an io.ReadWriter backed by a fixed size buffer. +// It never allocates, but moves old data as new data is written. +type fixedBuffer struct { + buf []byte + r, w int +} + +var ( + errReadEmpty = errors.New("read from empty fixedBuffer") + errWriteFull = errors.New("write on full fixedBuffer") +) + +// Read copies bytes from the buffer into p. +// It is an error to read when no data is available. +func (b *fixedBuffer) Read(p []byte) (n int, err error) { + if b.r == b.w { + return 0, errReadEmpty + } + n = copy(p, b.buf[b.r:b.w]) + b.r += n + if b.r == b.w { + b.r = 0 + b.w = 0 + } + return n, nil +} + +// Len returns the number of bytes of the unread portion of the buffer. +func (b *fixedBuffer) Len() int { + return b.w - b.r +} + +// Write copies bytes from p into the buffer. +// It is an error to write more data than the buffer can hold. +func (b *fixedBuffer) Write(p []byte) (n int, err error) { + // Slide existing data to beginning. + if b.r > 0 && len(p) > len(b.buf)-b.w { + copy(b.buf, b.buf[b.r:b.w]) + b.w -= b.r + b.r = 0 + } + + // Write new data. + n = copy(b.buf[b.w:], p) + b.w += n + if n < len(p) { + err = errWriteFull + } + return n, err +} diff --git a/vendor/golang.org/x/net/http2/flow.go b/vendor/golang.org/x/net/http2/flow.go new file mode 100644 index 0000000..957de25 --- /dev/null +++ b/vendor/golang.org/x/net/http2/flow.go @@ -0,0 +1,50 @@ +// Copyright 2014 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +// Flow control + +package http2 + +// flow is the flow control window's size. +type flow struct { + // n is the number of DATA bytes we're allowed to send. + // A flow is kept both on a conn and a per-stream. + n int32 + + // conn points to the shared connection-level flow that is + // shared by all streams on that conn. It is nil for the flow + // that's on the conn directly. + conn *flow +} + +func (f *flow) setConnFlow(cf *flow) { f.conn = cf } + +func (f *flow) available() int32 { + n := f.n + if f.conn != nil && f.conn.n < n { + n = f.conn.n + } + return n +} + +func (f *flow) take(n int32) { + if n > f.available() { + panic("internal error: took too much") + } + f.n -= n + if f.conn != nil { + f.conn.n -= n + } +} + +// add adds n bytes (positive or negative) to the flow control window. +// It returns false if the sum would exceed 2^31-1. +func (f *flow) add(n int32) bool { + remain := (1<<31 - 1) - f.n + if n > remain { + return false + } + f.n += n + return true +} diff --git a/vendor/golang.org/x/net/http2/frame.go b/vendor/golang.org/x/net/http2/frame.go new file mode 100644 index 0000000..358833f --- /dev/null +++ b/vendor/golang.org/x/net/http2/frame.go @@ -0,0 +1,1544 @@ +// Copyright 2014 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package http2 + +import ( + "bytes" + "encoding/binary" + "errors" + "fmt" + "io" + "log" + "strings" + "sync" + + "golang.org/x/net/http2/hpack" + "golang.org/x/net/lex/httplex" +) + +const frameHeaderLen = 9 + +var padZeros = make([]byte, 255) // zeros for padding + +// A FrameType is a registered frame type as defined in +// http://http2.github.io/http2-spec/#rfc.section.11.2 +type FrameType uint8 + +const ( + FrameData FrameType = 0x0 + FrameHeaders FrameType = 0x1 + FramePriority FrameType = 0x2 + FrameRSTStream FrameType = 0x3 + FrameSettings FrameType = 0x4 + FramePushPromise FrameType = 0x5 + FramePing FrameType = 0x6 + FrameGoAway FrameType = 0x7 + FrameWindowUpdate FrameType = 0x8 + FrameContinuation FrameType = 0x9 +) + +var frameName = map[FrameType]string{ + FrameData: "DATA", + FrameHeaders: "HEADERS", + FramePriority: "PRIORITY", + FrameRSTStream: "RST_STREAM", + FrameSettings: "SETTINGS", + FramePushPromise: "PUSH_PROMISE", + FramePing: "PING", + FrameGoAway: "GOAWAY", + FrameWindowUpdate: "WINDOW_UPDATE", + FrameContinuation: "CONTINUATION", +} + +func (t FrameType) String() string { + if s, ok := frameName[t]; ok { + return s + } + return fmt.Sprintf("UNKNOWN_FRAME_TYPE_%d", uint8(t)) +} + +// Flags is a bitmask of HTTP/2 flags. +// The meaning of flags varies depending on the frame type. +type Flags uint8 + +// Has reports whether f contains all (0 or more) flags in v. +func (f Flags) Has(v Flags) bool { + return (f & v) == v +} + +// Frame-specific FrameHeader flag bits. +const ( + // Data Frame + FlagDataEndStream Flags = 0x1 + FlagDataPadded Flags = 0x8 + + // Headers Frame + FlagHeadersEndStream Flags = 0x1 + FlagHeadersEndHeaders Flags = 0x4 + FlagHeadersPadded Flags = 0x8 + FlagHeadersPriority Flags = 0x20 + + // Settings Frame + FlagSettingsAck Flags = 0x1 + + // Ping Frame + FlagPingAck Flags = 0x1 + + // Continuation Frame + FlagContinuationEndHeaders Flags = 0x4 + + FlagPushPromiseEndHeaders Flags = 0x4 + FlagPushPromisePadded Flags = 0x8 +) + +var flagName = map[FrameType]map[Flags]string{ + FrameData: { + FlagDataEndStream: "END_STREAM", + FlagDataPadded: "PADDED", + }, + FrameHeaders: { + FlagHeadersEndStream: "END_STREAM", + FlagHeadersEndHeaders: "END_HEADERS", + FlagHeadersPadded: "PADDED", + FlagHeadersPriority: "PRIORITY", + }, + FrameSettings: { + FlagSettingsAck: "ACK", + }, + FramePing: { + FlagPingAck: "ACK", + }, + FrameContinuation: { + FlagContinuationEndHeaders: "END_HEADERS", + }, + FramePushPromise: { + FlagPushPromiseEndHeaders: "END_HEADERS", + FlagPushPromisePadded: "PADDED", + }, +} + +// a frameParser parses a frame given its FrameHeader and payload +// bytes. The length of payload will always equal fh.Length (which +// might be 0). +type frameParser func(fh FrameHeader, payload []byte) (Frame, error) + +var frameParsers = map[FrameType]frameParser{ + FrameData: parseDataFrame, + FrameHeaders: parseHeadersFrame, + FramePriority: parsePriorityFrame, + FrameRSTStream: parseRSTStreamFrame, + FrameSettings: parseSettingsFrame, + FramePushPromise: parsePushPromise, + FramePing: parsePingFrame, + FrameGoAway: parseGoAwayFrame, + FrameWindowUpdate: parseWindowUpdateFrame, + FrameContinuation: parseContinuationFrame, +} + +func typeFrameParser(t FrameType) frameParser { + if f := frameParsers[t]; f != nil { + return f + } + return parseUnknownFrame +} + +// A FrameHeader is the 9 byte header of all HTTP/2 frames. +// +// See http://http2.github.io/http2-spec/#FrameHeader +type FrameHeader struct { + valid bool // caller can access []byte fields in the Frame + + // Type is the 1 byte frame type. There are ten standard frame + // types, but extension frame types may be written by WriteRawFrame + // and will be returned by ReadFrame (as UnknownFrame). + Type FrameType + + // Flags are the 1 byte of 8 potential bit flags per frame. + // They are specific to the frame type. + Flags Flags + + // Length is the length of the frame, not including the 9 byte header. + // The maximum size is one byte less than 16MB (uint24), but only + // frames up to 16KB are allowed without peer agreement. + Length uint32 + + // StreamID is which stream this frame is for. Certain frames + // are not stream-specific, in which case this field is 0. + StreamID uint32 +} + +// Header returns h. It exists so FrameHeaders can be embedded in other +// specific frame types and implement the Frame interface. +func (h FrameHeader) Header() FrameHeader { return h } + +func (h FrameHeader) String() string { + var buf bytes.Buffer + buf.WriteString("[FrameHeader ") + h.writeDebug(&buf) + buf.WriteByte(']') + return buf.String() +} + +func (h FrameHeader) writeDebug(buf *bytes.Buffer) { + buf.WriteString(h.Type.String()) + if h.Flags != 0 { + buf.WriteString(" flags=") + set := 0 + for i := uint8(0); i < 8; i++ { + if h.Flags&(1< 1 { + buf.WriteByte('|') + } + name := flagName[h.Type][Flags(1<>24), + byte(streamID>>16), + byte(streamID>>8), + byte(streamID)) +} + +func (f *Framer) endWrite() error { + // Now that we know the final size, fill in the FrameHeader in + // the space previously reserved for it. Abuse append. + length := len(f.wbuf) - frameHeaderLen + if length >= (1 << 24) { + return ErrFrameTooLarge + } + _ = append(f.wbuf[:0], + byte(length>>16), + byte(length>>8), + byte(length)) + if f.logWrites { + f.logWrite() + } + + n, err := f.w.Write(f.wbuf) + if err == nil && n != len(f.wbuf) { + err = io.ErrShortWrite + } + return err +} + +func (f *Framer) logWrite() { + if f.debugFramer == nil { + f.debugFramerBuf = new(bytes.Buffer) + f.debugFramer = NewFramer(nil, f.debugFramerBuf) + f.debugFramer.logReads = false // we log it ourselves, saying "wrote" below + // Let us read anything, even if we accidentally wrote it + // in the wrong order: + f.debugFramer.AllowIllegalReads = true + } + f.debugFramerBuf.Write(f.wbuf) + fr, err := f.debugFramer.ReadFrame() + if err != nil { + f.debugWriteLoggerf("http2: Framer %p: failed to decode just-written frame", f) + return + } + f.debugWriteLoggerf("http2: Framer %p: wrote %v", f, summarizeFrame(fr)) +} + +func (f *Framer) writeByte(v byte) { f.wbuf = append(f.wbuf, v) } +func (f *Framer) writeBytes(v []byte) { f.wbuf = append(f.wbuf, v...) } +func (f *Framer) writeUint16(v uint16) { f.wbuf = append(f.wbuf, byte(v>>8), byte(v)) } +func (f *Framer) writeUint32(v uint32) { + f.wbuf = append(f.wbuf, byte(v>>24), byte(v>>16), byte(v>>8), byte(v)) +} + +const ( + minMaxFrameSize = 1 << 14 + maxFrameSize = 1<<24 - 1 +) + +// NewFramer returns a Framer that writes frames to w and reads them from r. +func NewFramer(w io.Writer, r io.Reader) *Framer { + fr := &Framer{ + w: w, + r: r, + logReads: logFrameReads, + logWrites: logFrameWrites, + debugReadLoggerf: log.Printf, + debugWriteLoggerf: log.Printf, + } + fr.getReadBuf = func(size uint32) []byte { + if cap(fr.readBuf) >= int(size) { + return fr.readBuf[:size] + } + fr.readBuf = make([]byte, size) + return fr.readBuf + } + fr.SetMaxReadFrameSize(maxFrameSize) + return fr +} + +// SetMaxReadFrameSize sets the maximum size of a frame +// that will be read by a subsequent call to ReadFrame. +// It is the caller's responsibility to advertise this +// limit with a SETTINGS frame. +func (fr *Framer) SetMaxReadFrameSize(v uint32) { + if v > maxFrameSize { + v = maxFrameSize + } + fr.maxReadSize = v +} + +// ErrorDetail returns a more detailed error of the last error +// returned by Framer.ReadFrame. For instance, if ReadFrame +// returns a StreamError with code PROTOCOL_ERROR, ErrorDetail +// will say exactly what was invalid. ErrorDetail is not guaranteed +// to return a non-nil value and like the rest of the http2 package, +// its return value is not protected by an API compatibility promise. +// ErrorDetail is reset after the next call to ReadFrame. +func (fr *Framer) ErrorDetail() error { + return fr.errDetail +} + +// ErrFrameTooLarge is returned from Framer.ReadFrame when the peer +// sends a frame that is larger than declared with SetMaxReadFrameSize. +var ErrFrameTooLarge = errors.New("http2: frame too large") + +// terminalReadFrameError reports whether err is an unrecoverable +// error from ReadFrame and no other frames should be read. +func terminalReadFrameError(err error) bool { + if _, ok := err.(StreamError); ok { + return false + } + return err != nil +} + +// ReadFrame reads a single frame. The returned Frame is only valid +// until the next call to ReadFrame. +// +// If the frame is larger than previously set with SetMaxReadFrameSize, the +// returned error is ErrFrameTooLarge. Other errors may be of type +// ConnectionError, StreamError, or anything else from the underlying +// reader. +func (fr *Framer) ReadFrame() (Frame, error) { + fr.errDetail = nil + if fr.lastFrame != nil { + fr.lastFrame.invalidate() + } + fh, err := readFrameHeader(fr.headerBuf[:], fr.r) + if err != nil { + return nil, err + } + if fh.Length > fr.maxReadSize { + return nil, ErrFrameTooLarge + } + payload := fr.getReadBuf(fh.Length) + if _, err := io.ReadFull(fr.r, payload); err != nil { + return nil, err + } + f, err := typeFrameParser(fh.Type)(fh, payload) + if err != nil { + if ce, ok := err.(connError); ok { + return nil, fr.connError(ce.Code, ce.Reason) + } + return nil, err + } + if err := fr.checkFrameOrder(f); err != nil { + return nil, err + } + if fr.logReads { + fr.debugReadLoggerf("http2: Framer %p: read %v", fr, summarizeFrame(f)) + } + if fh.Type == FrameHeaders && fr.ReadMetaHeaders != nil { + return fr.readMetaFrame(f.(*HeadersFrame)) + } + return f, nil +} + +// connError returns ConnectionError(code) but first +// stashes away a public reason to the caller can optionally relay it +// to the peer before hanging up on them. This might help others debug +// their implementations. +func (fr *Framer) connError(code ErrCode, reason string) error { + fr.errDetail = errors.New(reason) + return ConnectionError(code) +} + +// checkFrameOrder reports an error if f is an invalid frame to return +// next from ReadFrame. Mostly it checks whether HEADERS and +// CONTINUATION frames are contiguous. +func (fr *Framer) checkFrameOrder(f Frame) error { + last := fr.lastFrame + fr.lastFrame = f + if fr.AllowIllegalReads { + return nil + } + + fh := f.Header() + if fr.lastHeaderStream != 0 { + if fh.Type != FrameContinuation { + return fr.connError(ErrCodeProtocol, + fmt.Sprintf("got %s for stream %d; expected CONTINUATION following %s for stream %d", + fh.Type, fh.StreamID, + last.Header().Type, fr.lastHeaderStream)) + } + if fh.StreamID != fr.lastHeaderStream { + return fr.connError(ErrCodeProtocol, + fmt.Sprintf("got CONTINUATION for stream %d; expected stream %d", + fh.StreamID, fr.lastHeaderStream)) + } + } else if fh.Type == FrameContinuation { + return fr.connError(ErrCodeProtocol, fmt.Sprintf("unexpected CONTINUATION for stream %d", fh.StreamID)) + } + + switch fh.Type { + case FrameHeaders, FrameContinuation: + if fh.Flags.Has(FlagHeadersEndHeaders) { + fr.lastHeaderStream = 0 + } else { + fr.lastHeaderStream = fh.StreamID + } + } + + return nil +} + +// A DataFrame conveys arbitrary, variable-length sequences of octets +// associated with a stream. +// See http://http2.github.io/http2-spec/#rfc.section.6.1 +type DataFrame struct { + FrameHeader + data []byte +} + +func (f *DataFrame) StreamEnded() bool { + return f.FrameHeader.Flags.Has(FlagDataEndStream) +} + +// Data returns the frame's data octets, not including any padding +// size byte or padding suffix bytes. +// The caller must not retain the returned memory past the next +// call to ReadFrame. +func (f *DataFrame) Data() []byte { + f.checkValid() + return f.data +} + +func parseDataFrame(fh FrameHeader, payload []byte) (Frame, error) { + if fh.StreamID == 0 { + // DATA frames MUST be associated with a stream. If a + // DATA frame is received whose stream identifier + // field is 0x0, the recipient MUST respond with a + // connection error (Section 5.4.1) of type + // PROTOCOL_ERROR. + return nil, connError{ErrCodeProtocol, "DATA frame with stream ID 0"} + } + f := &DataFrame{ + FrameHeader: fh, + } + var padSize byte + if fh.Flags.Has(FlagDataPadded) { + var err error + payload, padSize, err = readByte(payload) + if err != nil { + return nil, err + } + } + if int(padSize) > len(payload) { + // If the length of the padding is greater than the + // length of the frame payload, the recipient MUST + // treat this as a connection error. + // Filed: https://github.com/http2/http2-spec/issues/610 + return nil, connError{ErrCodeProtocol, "pad size larger than data payload"} + } + f.data = payload[:len(payload)-int(padSize)] + return f, nil +} + +var ( + errStreamID = errors.New("invalid stream ID") + errDepStreamID = errors.New("invalid dependent stream ID") + errPadLength = errors.New("pad length too large") +) + +func validStreamIDOrZero(streamID uint32) bool { + return streamID&(1<<31) == 0 +} + +func validStreamID(streamID uint32) bool { + return streamID != 0 && streamID&(1<<31) == 0 +} + +// WriteData writes a DATA frame. +// +// It will perform exactly one Write to the underlying Writer. +// It is the caller's responsibility not to violate the maximum frame size +// and to not call other Write methods concurrently. +func (f *Framer) WriteData(streamID uint32, endStream bool, data []byte) error { + return f.WriteDataPadded(streamID, endStream, data, nil) +} + +// WriteData writes a DATA frame with optional padding. +// +// If pad is nil, the padding bit is not sent. +// The length of pad must not exceed 255 bytes. +// +// It will perform exactly one Write to the underlying Writer. +// It is the caller's responsibility not to violate the maximum frame size +// and to not call other Write methods concurrently. +func (f *Framer) WriteDataPadded(streamID uint32, endStream bool, data, pad []byte) error { + if !validStreamID(streamID) && !f.AllowIllegalWrites { + return errStreamID + } + if len(pad) > 255 { + return errPadLength + } + var flags Flags + if endStream { + flags |= FlagDataEndStream + } + if pad != nil { + flags |= FlagDataPadded + } + f.startWrite(FrameData, flags, streamID) + if pad != nil { + f.wbuf = append(f.wbuf, byte(len(pad))) + } + f.wbuf = append(f.wbuf, data...) + f.wbuf = append(f.wbuf, pad...) + return f.endWrite() +} + +// A SettingsFrame conveys configuration parameters that affect how +// endpoints communicate, such as preferences and constraints on peer +// behavior. +// +// See http://http2.github.io/http2-spec/#SETTINGS +type SettingsFrame struct { + FrameHeader + p []byte +} + +func parseSettingsFrame(fh FrameHeader, p []byte) (Frame, error) { + if fh.Flags.Has(FlagSettingsAck) && fh.Length > 0 { + // When this (ACK 0x1) bit is set, the payload of the + // SETTINGS frame MUST be empty. Receipt of a + // SETTINGS frame with the ACK flag set and a length + // field value other than 0 MUST be treated as a + // connection error (Section 5.4.1) of type + // FRAME_SIZE_ERROR. + return nil, ConnectionError(ErrCodeFrameSize) + } + if fh.StreamID != 0 { + // SETTINGS frames always apply to a connection, + // never a single stream. The stream identifier for a + // SETTINGS frame MUST be zero (0x0). If an endpoint + // receives a SETTINGS frame whose stream identifier + // field is anything other than 0x0, the endpoint MUST + // respond with a connection error (Section 5.4.1) of + // type PROTOCOL_ERROR. + return nil, ConnectionError(ErrCodeProtocol) + } + if len(p)%6 != 0 { + // Expecting even number of 6 byte settings. + return nil, ConnectionError(ErrCodeFrameSize) + } + f := &SettingsFrame{FrameHeader: fh, p: p} + if v, ok := f.Value(SettingInitialWindowSize); ok && v > (1<<31)-1 { + // Values above the maximum flow control window size of 2^31 - 1 MUST + // be treated as a connection error (Section 5.4.1) of type + // FLOW_CONTROL_ERROR. + return nil, ConnectionError(ErrCodeFlowControl) + } + return f, nil +} + +func (f *SettingsFrame) IsAck() bool { + return f.FrameHeader.Flags.Has(FlagSettingsAck) +} + +func (f *SettingsFrame) Value(s SettingID) (v uint32, ok bool) { + f.checkValid() + buf := f.p + for len(buf) > 0 { + settingID := SettingID(binary.BigEndian.Uint16(buf[:2])) + if settingID == s { + return binary.BigEndian.Uint32(buf[2:6]), true + } + buf = buf[6:] + } + return 0, false +} + +// ForeachSetting runs fn for each setting. +// It stops and returns the first error. +func (f *SettingsFrame) ForeachSetting(fn func(Setting) error) error { + f.checkValid() + buf := f.p + for len(buf) > 0 { + if err := fn(Setting{ + SettingID(binary.BigEndian.Uint16(buf[:2])), + binary.BigEndian.Uint32(buf[2:6]), + }); err != nil { + return err + } + buf = buf[6:] + } + return nil +} + +// WriteSettings writes a SETTINGS frame with zero or more settings +// specified and the ACK bit not set. +// +// It will perform exactly one Write to the underlying Writer. +// It is the caller's responsibility to not call other Write methods concurrently. +func (f *Framer) WriteSettings(settings ...Setting) error { + f.startWrite(FrameSettings, 0, 0) + for _, s := range settings { + f.writeUint16(uint16(s.ID)) + f.writeUint32(s.Val) + } + return f.endWrite() +} + +// WriteSettingsAck writes an empty SETTINGS frame with the ACK bit set. +// +// It will perform exactly one Write to the underlying Writer. +// It is the caller's responsibility to not call other Write methods concurrently. +func (f *Framer) WriteSettingsAck() error { + f.startWrite(FrameSettings, FlagSettingsAck, 0) + return f.endWrite() +} + +// A PingFrame is a mechanism for measuring a minimal round trip time +// from the sender, as well as determining whether an idle connection +// is still functional. +// See http://http2.github.io/http2-spec/#rfc.section.6.7 +type PingFrame struct { + FrameHeader + Data [8]byte +} + +func (f *PingFrame) IsAck() bool { return f.Flags.Has(FlagPingAck) } + +func parsePingFrame(fh FrameHeader, payload []byte) (Frame, error) { + if len(payload) != 8 { + return nil, ConnectionError(ErrCodeFrameSize) + } + if fh.StreamID != 0 { + return nil, ConnectionError(ErrCodeProtocol) + } + f := &PingFrame{FrameHeader: fh} + copy(f.Data[:], payload) + return f, nil +} + +func (f *Framer) WritePing(ack bool, data [8]byte) error { + var flags Flags + if ack { + flags = FlagPingAck + } + f.startWrite(FramePing, flags, 0) + f.writeBytes(data[:]) + return f.endWrite() +} + +// A GoAwayFrame informs the remote peer to stop creating streams on this connection. +// See http://http2.github.io/http2-spec/#rfc.section.6.8 +type GoAwayFrame struct { + FrameHeader + LastStreamID uint32 + ErrCode ErrCode + debugData []byte +} + +// DebugData returns any debug data in the GOAWAY frame. Its contents +// are not defined. +// The caller must not retain the returned memory past the next +// call to ReadFrame. +func (f *GoAwayFrame) DebugData() []byte { + f.checkValid() + return f.debugData +} + +func parseGoAwayFrame(fh FrameHeader, p []byte) (Frame, error) { + if fh.StreamID != 0 { + return nil, ConnectionError(ErrCodeProtocol) + } + if len(p) < 8 { + return nil, ConnectionError(ErrCodeFrameSize) + } + return &GoAwayFrame{ + FrameHeader: fh, + LastStreamID: binary.BigEndian.Uint32(p[:4]) & (1<<31 - 1), + ErrCode: ErrCode(binary.BigEndian.Uint32(p[4:8])), + debugData: p[8:], + }, nil +} + +func (f *Framer) WriteGoAway(maxStreamID uint32, code ErrCode, debugData []byte) error { + f.startWrite(FrameGoAway, 0, 0) + f.writeUint32(maxStreamID & (1<<31 - 1)) + f.writeUint32(uint32(code)) + f.writeBytes(debugData) + return f.endWrite() +} + +// An UnknownFrame is the frame type returned when the frame type is unknown +// or no specific frame type parser exists. +type UnknownFrame struct { + FrameHeader + p []byte +} + +// Payload returns the frame's payload (after the header). It is not +// valid to call this method after a subsequent call to +// Framer.ReadFrame, nor is it valid to retain the returned slice. +// The memory is owned by the Framer and is invalidated when the next +// frame is read. +func (f *UnknownFrame) Payload() []byte { + f.checkValid() + return f.p +} + +func parseUnknownFrame(fh FrameHeader, p []byte) (Frame, error) { + return &UnknownFrame{fh, p}, nil +} + +// A WindowUpdateFrame is used to implement flow control. +// See http://http2.github.io/http2-spec/#rfc.section.6.9 +type WindowUpdateFrame struct { + FrameHeader + Increment uint32 // never read with high bit set +} + +func parseWindowUpdateFrame(fh FrameHeader, p []byte) (Frame, error) { + if len(p) != 4 { + return nil, ConnectionError(ErrCodeFrameSize) + } + inc := binary.BigEndian.Uint32(p[:4]) & 0x7fffffff // mask off high reserved bit + if inc == 0 { + // A receiver MUST treat the receipt of a + // WINDOW_UPDATE frame with an flow control window + // increment of 0 as a stream error (Section 5.4.2) of + // type PROTOCOL_ERROR; errors on the connection flow + // control window MUST be treated as a connection + // error (Section 5.4.1). + if fh.StreamID == 0 { + return nil, ConnectionError(ErrCodeProtocol) + } + return nil, streamError(fh.StreamID, ErrCodeProtocol) + } + return &WindowUpdateFrame{ + FrameHeader: fh, + Increment: inc, + }, nil +} + +// WriteWindowUpdate writes a WINDOW_UPDATE frame. +// The increment value must be between 1 and 2,147,483,647, inclusive. +// If the Stream ID is zero, the window update applies to the +// connection as a whole. +func (f *Framer) WriteWindowUpdate(streamID, incr uint32) error { + // "The legal range for the increment to the flow control window is 1 to 2^31-1 (2,147,483,647) octets." + if (incr < 1 || incr > 2147483647) && !f.AllowIllegalWrites { + return errors.New("illegal window increment value") + } + f.startWrite(FrameWindowUpdate, 0, streamID) + f.writeUint32(incr) + return f.endWrite() +} + +// A HeadersFrame is used to open a stream and additionally carries a +// header block fragment. +type HeadersFrame struct { + FrameHeader + + // Priority is set if FlagHeadersPriority is set in the FrameHeader. + Priority PriorityParam + + headerFragBuf []byte // not owned +} + +func (f *HeadersFrame) HeaderBlockFragment() []byte { + f.checkValid() + return f.headerFragBuf +} + +func (f *HeadersFrame) HeadersEnded() bool { + return f.FrameHeader.Flags.Has(FlagHeadersEndHeaders) +} + +func (f *HeadersFrame) StreamEnded() bool { + return f.FrameHeader.Flags.Has(FlagHeadersEndStream) +} + +func (f *HeadersFrame) HasPriority() bool { + return f.FrameHeader.Flags.Has(FlagHeadersPriority) +} + +func parseHeadersFrame(fh FrameHeader, p []byte) (_ Frame, err error) { + hf := &HeadersFrame{ + FrameHeader: fh, + } + if fh.StreamID == 0 { + // HEADERS frames MUST be associated with a stream. If a HEADERS frame + // is received whose stream identifier field is 0x0, the recipient MUST + // respond with a connection error (Section 5.4.1) of type + // PROTOCOL_ERROR. + return nil, connError{ErrCodeProtocol, "HEADERS frame with stream ID 0"} + } + var padLength uint8 + if fh.Flags.Has(FlagHeadersPadded) { + if p, padLength, err = readByte(p); err != nil { + return + } + } + if fh.Flags.Has(FlagHeadersPriority) { + var v uint32 + p, v, err = readUint32(p) + if err != nil { + return nil, err + } + hf.Priority.StreamDep = v & 0x7fffffff + hf.Priority.Exclusive = (v != hf.Priority.StreamDep) // high bit was set + p, hf.Priority.Weight, err = readByte(p) + if err != nil { + return nil, err + } + } + if len(p)-int(padLength) <= 0 { + return nil, streamError(fh.StreamID, ErrCodeProtocol) + } + hf.headerFragBuf = p[:len(p)-int(padLength)] + return hf, nil +} + +// HeadersFrameParam are the parameters for writing a HEADERS frame. +type HeadersFrameParam struct { + // StreamID is the required Stream ID to initiate. + StreamID uint32 + // BlockFragment is part (or all) of a Header Block. + BlockFragment []byte + + // EndStream indicates that the header block is the last that + // the endpoint will send for the identified stream. Setting + // this flag causes the stream to enter one of "half closed" + // states. + EndStream bool + + // EndHeaders indicates that this frame contains an entire + // header block and is not followed by any + // CONTINUATION frames. + EndHeaders bool + + // PadLength is the optional number of bytes of zeros to add + // to this frame. + PadLength uint8 + + // Priority, if non-zero, includes stream priority information + // in the HEADER frame. + Priority PriorityParam +} + +// WriteHeaders writes a single HEADERS frame. +// +// This is a low-level header writing method. Encoding headers and +// splitting them into any necessary CONTINUATION frames is handled +// elsewhere. +// +// It will perform exactly one Write to the underlying Writer. +// It is the caller's responsibility to not call other Write methods concurrently. +func (f *Framer) WriteHeaders(p HeadersFrameParam) error { + if !validStreamID(p.StreamID) && !f.AllowIllegalWrites { + return errStreamID + } + var flags Flags + if p.PadLength != 0 { + flags |= FlagHeadersPadded + } + if p.EndStream { + flags |= FlagHeadersEndStream + } + if p.EndHeaders { + flags |= FlagHeadersEndHeaders + } + if !p.Priority.IsZero() { + flags |= FlagHeadersPriority + } + f.startWrite(FrameHeaders, flags, p.StreamID) + if p.PadLength != 0 { + f.writeByte(p.PadLength) + } + if !p.Priority.IsZero() { + v := p.Priority.StreamDep + if !validStreamIDOrZero(v) && !f.AllowIllegalWrites { + return errDepStreamID + } + if p.Priority.Exclusive { + v |= 1 << 31 + } + f.writeUint32(v) + f.writeByte(p.Priority.Weight) + } + f.wbuf = append(f.wbuf, p.BlockFragment...) + f.wbuf = append(f.wbuf, padZeros[:p.PadLength]...) + return f.endWrite() +} + +// A PriorityFrame specifies the sender-advised priority of a stream. +// See http://http2.github.io/http2-spec/#rfc.section.6.3 +type PriorityFrame struct { + FrameHeader + PriorityParam +} + +// PriorityParam are the stream prioritzation parameters. +type PriorityParam struct { + // StreamDep is a 31-bit stream identifier for the + // stream that this stream depends on. Zero means no + // dependency. + StreamDep uint32 + + // Exclusive is whether the dependency is exclusive. + Exclusive bool + + // Weight is the stream's zero-indexed weight. It should be + // set together with StreamDep, or neither should be set. Per + // the spec, "Add one to the value to obtain a weight between + // 1 and 256." + Weight uint8 +} + +func (p PriorityParam) IsZero() bool { + return p == PriorityParam{} +} + +func parsePriorityFrame(fh FrameHeader, payload []byte) (Frame, error) { + if fh.StreamID == 0 { + return nil, connError{ErrCodeProtocol, "PRIORITY frame with stream ID 0"} + } + if len(payload) != 5 { + return nil, connError{ErrCodeFrameSize, fmt.Sprintf("PRIORITY frame payload size was %d; want 5", len(payload))} + } + v := binary.BigEndian.Uint32(payload[:4]) + streamID := v & 0x7fffffff // mask off high bit + return &PriorityFrame{ + FrameHeader: fh, + PriorityParam: PriorityParam{ + Weight: payload[4], + StreamDep: streamID, + Exclusive: streamID != v, // was high bit set? + }, + }, nil +} + +// WritePriority writes a PRIORITY frame. +// +// It will perform exactly one Write to the underlying Writer. +// It is the caller's responsibility to not call other Write methods concurrently. +func (f *Framer) WritePriority(streamID uint32, p PriorityParam) error { + if !validStreamID(streamID) && !f.AllowIllegalWrites { + return errStreamID + } + if !validStreamIDOrZero(p.StreamDep) { + return errDepStreamID + } + f.startWrite(FramePriority, 0, streamID) + v := p.StreamDep + if p.Exclusive { + v |= 1 << 31 + } + f.writeUint32(v) + f.writeByte(p.Weight) + return f.endWrite() +} + +// A RSTStreamFrame allows for abnormal termination of a stream. +// See http://http2.github.io/http2-spec/#rfc.section.6.4 +type RSTStreamFrame struct { + FrameHeader + ErrCode ErrCode +} + +func parseRSTStreamFrame(fh FrameHeader, p []byte) (Frame, error) { + if len(p) != 4 { + return nil, ConnectionError(ErrCodeFrameSize) + } + if fh.StreamID == 0 { + return nil, ConnectionError(ErrCodeProtocol) + } + return &RSTStreamFrame{fh, ErrCode(binary.BigEndian.Uint32(p[:4]))}, nil +} + +// WriteRSTStream writes a RST_STREAM frame. +// +// It will perform exactly one Write to the underlying Writer. +// It is the caller's responsibility to not call other Write methods concurrently. +func (f *Framer) WriteRSTStream(streamID uint32, code ErrCode) error { + if !validStreamID(streamID) && !f.AllowIllegalWrites { + return errStreamID + } + f.startWrite(FrameRSTStream, 0, streamID) + f.writeUint32(uint32(code)) + return f.endWrite() +} + +// A ContinuationFrame is used to continue a sequence of header block fragments. +// See http://http2.github.io/http2-spec/#rfc.section.6.10 +type ContinuationFrame struct { + FrameHeader + headerFragBuf []byte +} + +func parseContinuationFrame(fh FrameHeader, p []byte) (Frame, error) { + if fh.StreamID == 0 { + return nil, connError{ErrCodeProtocol, "CONTINUATION frame with stream ID 0"} + } + return &ContinuationFrame{fh, p}, nil +} + +func (f *ContinuationFrame) HeaderBlockFragment() []byte { + f.checkValid() + return f.headerFragBuf +} + +func (f *ContinuationFrame) HeadersEnded() bool { + return f.FrameHeader.Flags.Has(FlagContinuationEndHeaders) +} + +// WriteContinuation writes a CONTINUATION frame. +// +// It will perform exactly one Write to the underlying Writer. +// It is the caller's responsibility to not call other Write methods concurrently. +func (f *Framer) WriteContinuation(streamID uint32, endHeaders bool, headerBlockFragment []byte) error { + if !validStreamID(streamID) && !f.AllowIllegalWrites { + return errStreamID + } + var flags Flags + if endHeaders { + flags |= FlagContinuationEndHeaders + } + f.startWrite(FrameContinuation, flags, streamID) + f.wbuf = append(f.wbuf, headerBlockFragment...) + return f.endWrite() +} + +// A PushPromiseFrame is used to initiate a server stream. +// See http://http2.github.io/http2-spec/#rfc.section.6.6 +type PushPromiseFrame struct { + FrameHeader + PromiseID uint32 + headerFragBuf []byte // not owned +} + +func (f *PushPromiseFrame) HeaderBlockFragment() []byte { + f.checkValid() + return f.headerFragBuf +} + +func (f *PushPromiseFrame) HeadersEnded() bool { + return f.FrameHeader.Flags.Has(FlagPushPromiseEndHeaders) +} + +func parsePushPromise(fh FrameHeader, p []byte) (_ Frame, err error) { + pp := &PushPromiseFrame{ + FrameHeader: fh, + } + if pp.StreamID == 0 { + // PUSH_PROMISE frames MUST be associated with an existing, + // peer-initiated stream. The stream identifier of a + // PUSH_PROMISE frame indicates the stream it is associated + // with. If the stream identifier field specifies the value + // 0x0, a recipient MUST respond with a connection error + // (Section 5.4.1) of type PROTOCOL_ERROR. + return nil, ConnectionError(ErrCodeProtocol) + } + // The PUSH_PROMISE frame includes optional padding. + // Padding fields and flags are identical to those defined for DATA frames + var padLength uint8 + if fh.Flags.Has(FlagPushPromisePadded) { + if p, padLength, err = readByte(p); err != nil { + return + } + } + + p, pp.PromiseID, err = readUint32(p) + if err != nil { + return + } + pp.PromiseID = pp.PromiseID & (1<<31 - 1) + + if int(padLength) > len(p) { + // like the DATA frame, error out if padding is longer than the body. + return nil, ConnectionError(ErrCodeProtocol) + } + pp.headerFragBuf = p[:len(p)-int(padLength)] + return pp, nil +} + +// PushPromiseParam are the parameters for writing a PUSH_PROMISE frame. +type PushPromiseParam struct { + // StreamID is the required Stream ID to initiate. + StreamID uint32 + + // PromiseID is the required Stream ID which this + // Push Promises + PromiseID uint32 + + // BlockFragment is part (or all) of a Header Block. + BlockFragment []byte + + // EndHeaders indicates that this frame contains an entire + // header block and is not followed by any + // CONTINUATION frames. + EndHeaders bool + + // PadLength is the optional number of bytes of zeros to add + // to this frame. + PadLength uint8 +} + +// WritePushPromise writes a single PushPromise Frame. +// +// As with Header Frames, This is the low level call for writing +// individual frames. Continuation frames are handled elsewhere. +// +// It will perform exactly one Write to the underlying Writer. +// It is the caller's responsibility to not call other Write methods concurrently. +func (f *Framer) WritePushPromise(p PushPromiseParam) error { + if !validStreamID(p.StreamID) && !f.AllowIllegalWrites { + return errStreamID + } + var flags Flags + if p.PadLength != 0 { + flags |= FlagPushPromisePadded + } + if p.EndHeaders { + flags |= FlagPushPromiseEndHeaders + } + f.startWrite(FramePushPromise, flags, p.StreamID) + if p.PadLength != 0 { + f.writeByte(p.PadLength) + } + if !validStreamID(p.PromiseID) && !f.AllowIllegalWrites { + return errStreamID + } + f.writeUint32(p.PromiseID) + f.wbuf = append(f.wbuf, p.BlockFragment...) + f.wbuf = append(f.wbuf, padZeros[:p.PadLength]...) + return f.endWrite() +} + +// WriteRawFrame writes a raw frame. This can be used to write +// extension frames unknown to this package. +func (f *Framer) WriteRawFrame(t FrameType, flags Flags, streamID uint32, payload []byte) error { + f.startWrite(t, flags, streamID) + f.writeBytes(payload) + return f.endWrite() +} + +func readByte(p []byte) (remain []byte, b byte, err error) { + if len(p) == 0 { + return nil, 0, io.ErrUnexpectedEOF + } + return p[1:], p[0], nil +} + +func readUint32(p []byte) (remain []byte, v uint32, err error) { + if len(p) < 4 { + return nil, 0, io.ErrUnexpectedEOF + } + return p[4:], binary.BigEndian.Uint32(p[:4]), nil +} + +type streamEnder interface { + StreamEnded() bool +} + +type headersEnder interface { + HeadersEnded() bool +} + +type headersOrContinuation interface { + headersEnder + HeaderBlockFragment() []byte +} + +// A MetaHeadersFrame is the representation of one HEADERS frame and +// zero or more contiguous CONTINUATION frames and the decoding of +// their HPACK-encoded contents. +// +// This type of frame does not appear on the wire and is only returned +// by the Framer when Framer.ReadMetaHeaders is set. +type MetaHeadersFrame struct { + *HeadersFrame + + // Fields are the fields contained in the HEADERS and + // CONTINUATION frames. The underlying slice is owned by the + // Framer and must not be retained after the next call to + // ReadFrame. + // + // Fields are guaranteed to be in the correct http2 order and + // not have unknown pseudo header fields or invalid header + // field names or values. Required pseudo header fields may be + // missing, however. Use the MetaHeadersFrame.Pseudo accessor + // method access pseudo headers. + Fields []hpack.HeaderField + + // Truncated is whether the max header list size limit was hit + // and Fields is incomplete. The hpack decoder state is still + // valid, however. + Truncated bool +} + +// PseudoValue returns the given pseudo header field's value. +// The provided pseudo field should not contain the leading colon. +func (mh *MetaHeadersFrame) PseudoValue(pseudo string) string { + for _, hf := range mh.Fields { + if !hf.IsPseudo() { + return "" + } + if hf.Name[1:] == pseudo { + return hf.Value + } + } + return "" +} + +// RegularFields returns the regular (non-pseudo) header fields of mh. +// The caller does not own the returned slice. +func (mh *MetaHeadersFrame) RegularFields() []hpack.HeaderField { + for i, hf := range mh.Fields { + if !hf.IsPseudo() { + return mh.Fields[i:] + } + } + return nil +} + +// PseudoFields returns the pseudo header fields of mh. +// The caller does not own the returned slice. +func (mh *MetaHeadersFrame) PseudoFields() []hpack.HeaderField { + for i, hf := range mh.Fields { + if !hf.IsPseudo() { + return mh.Fields[:i] + } + } + return mh.Fields +} + +func (mh *MetaHeadersFrame) checkPseudos() error { + var isRequest, isResponse bool + pf := mh.PseudoFields() + for i, hf := range pf { + switch hf.Name { + case ":method", ":path", ":scheme", ":authority": + isRequest = true + case ":status": + isResponse = true + default: + return pseudoHeaderError(hf.Name) + } + // Check for duplicates. + // This would be a bad algorithm, but N is 4. + // And this doesn't allocate. + for _, hf2 := range pf[:i] { + if hf.Name == hf2.Name { + return duplicatePseudoHeaderError(hf.Name) + } + } + } + if isRequest && isResponse { + return errMixPseudoHeaderTypes + } + return nil +} + +func (fr *Framer) maxHeaderStringLen() int { + v := fr.maxHeaderListSize() + if uint32(int(v)) == v { + return int(v) + } + // They had a crazy big number for MaxHeaderBytes anyway, + // so give them unlimited header lengths: + return 0 +} + +// readMetaFrame returns 0 or more CONTINUATION frames from fr and +// merge them into into the provided hf and returns a MetaHeadersFrame +// with the decoded hpack values. +func (fr *Framer) readMetaFrame(hf *HeadersFrame) (*MetaHeadersFrame, error) { + if fr.AllowIllegalReads { + return nil, errors.New("illegal use of AllowIllegalReads with ReadMetaHeaders") + } + mh := &MetaHeadersFrame{ + HeadersFrame: hf, + } + var remainSize = fr.maxHeaderListSize() + var sawRegular bool + + var invalid error // pseudo header field errors + hdec := fr.ReadMetaHeaders + hdec.SetEmitEnabled(true) + hdec.SetMaxStringLength(fr.maxHeaderStringLen()) + hdec.SetEmitFunc(func(hf hpack.HeaderField) { + if VerboseLogs && fr.logReads { + fr.debugReadLoggerf("http2: decoded hpack field %+v", hf) + } + if !httplex.ValidHeaderFieldValue(hf.Value) { + invalid = headerFieldValueError(hf.Value) + } + isPseudo := strings.HasPrefix(hf.Name, ":") + if isPseudo { + if sawRegular { + invalid = errPseudoAfterRegular + } + } else { + sawRegular = true + if !validWireHeaderFieldName(hf.Name) { + invalid = headerFieldNameError(hf.Name) + } + } + + if invalid != nil { + hdec.SetEmitEnabled(false) + return + } + + size := hf.Size() + if size > remainSize { + hdec.SetEmitEnabled(false) + mh.Truncated = true + return + } + remainSize -= size + + mh.Fields = append(mh.Fields, hf) + }) + // Lose reference to MetaHeadersFrame: + defer hdec.SetEmitFunc(func(hf hpack.HeaderField) {}) + + var hc headersOrContinuation = hf + for { + frag := hc.HeaderBlockFragment() + if _, err := hdec.Write(frag); err != nil { + return nil, ConnectionError(ErrCodeCompression) + } + + if hc.HeadersEnded() { + break + } + if f, err := fr.ReadFrame(); err != nil { + return nil, err + } else { + hc = f.(*ContinuationFrame) // guaranteed by checkFrameOrder + } + } + + mh.HeadersFrame.headerFragBuf = nil + mh.HeadersFrame.invalidate() + + if err := hdec.Close(); err != nil { + return nil, ConnectionError(ErrCodeCompression) + } + if invalid != nil { + fr.errDetail = invalid + if VerboseLogs { + log.Printf("http2: invalid header: %v", invalid) + } + return nil, StreamError{mh.StreamID, ErrCodeProtocol, invalid} + } + if err := mh.checkPseudos(); err != nil { + fr.errDetail = err + if VerboseLogs { + log.Printf("http2: invalid pseudo headers: %v", err) + } + return nil, StreamError{mh.StreamID, ErrCodeProtocol, err} + } + return mh, nil +} + +func summarizeFrame(f Frame) string { + var buf bytes.Buffer + f.Header().writeDebug(&buf) + switch f := f.(type) { + case *SettingsFrame: + n := 0 + f.ForeachSetting(func(s Setting) error { + n++ + if n == 1 { + buf.WriteString(", settings:") + } + fmt.Fprintf(&buf, " %v=%v,", s.ID, s.Val) + return nil + }) + if n > 0 { + buf.Truncate(buf.Len() - 1) // remove trailing comma + } + case *DataFrame: + data := f.Data() + const max = 256 + if len(data) > max { + data = data[:max] + } + fmt.Fprintf(&buf, " data=%q", data) + if len(f.Data()) > max { + fmt.Fprintf(&buf, " (%d bytes omitted)", len(f.Data())-max) + } + case *WindowUpdateFrame: + if f.StreamID == 0 { + buf.WriteString(" (conn)") + } + fmt.Fprintf(&buf, " incr=%v", f.Increment) + case *PingFrame: + fmt.Fprintf(&buf, " ping=%q", f.Data[:]) + case *GoAwayFrame: + fmt.Fprintf(&buf, " LastStreamID=%v ErrCode=%v Debug=%q", + f.LastStreamID, f.ErrCode, f.debugData) + case *RSTStreamFrame: + fmt.Fprintf(&buf, " ErrCode=%v", f.ErrCode) + } + return buf.String() +} diff --git a/vendor/golang.org/x/net/http2/go16.go b/vendor/golang.org/x/net/http2/go16.go new file mode 100644 index 0000000..2b72855 --- /dev/null +++ b/vendor/golang.org/x/net/http2/go16.go @@ -0,0 +1,43 @@ +// Copyright 2016 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +// +build go1.6 + +package http2 + +import ( + "crypto/tls" + "net/http" + "time" +) + +func transportExpectContinueTimeout(t1 *http.Transport) time.Duration { + return t1.ExpectContinueTimeout +} + +// isBadCipher reports whether the cipher is blacklisted by the HTTP/2 spec. +func isBadCipher(cipher uint16) bool { + switch cipher { + case tls.TLS_RSA_WITH_RC4_128_SHA, + tls.TLS_RSA_WITH_3DES_EDE_CBC_SHA, + tls.TLS_RSA_WITH_AES_128_CBC_SHA, + tls.TLS_RSA_WITH_AES_256_CBC_SHA, + tls.TLS_RSA_WITH_AES_128_GCM_SHA256, + tls.TLS_RSA_WITH_AES_256_GCM_SHA384, + tls.TLS_ECDHE_ECDSA_WITH_RC4_128_SHA, + tls.TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA, + tls.TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA, + tls.TLS_ECDHE_RSA_WITH_RC4_128_SHA, + tls.TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA, + tls.TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA, + tls.TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA: + // Reject cipher suites from Appendix A. + // "This list includes those cipher suites that do not + // offer an ephemeral key exchange and those that are + // based on the TLS null, stream or block cipher type" + return true + default: + return false + } +} diff --git a/vendor/golang.org/x/net/http2/go17.go b/vendor/golang.org/x/net/http2/go17.go new file mode 100644 index 0000000..47b7fae --- /dev/null +++ b/vendor/golang.org/x/net/http2/go17.go @@ -0,0 +1,106 @@ +// Copyright 2016 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +// +build go1.7 + +package http2 + +import ( + "context" + "net" + "net/http" + "net/http/httptrace" + "time" +) + +type contextContext interface { + context.Context +} + +func serverConnBaseContext(c net.Conn, opts *ServeConnOpts) (ctx contextContext, cancel func()) { + ctx, cancel = context.WithCancel(context.Background()) + ctx = context.WithValue(ctx, http.LocalAddrContextKey, c.LocalAddr()) + if hs := opts.baseConfig(); hs != nil { + ctx = context.WithValue(ctx, http.ServerContextKey, hs) + } + return +} + +func contextWithCancel(ctx contextContext) (_ contextContext, cancel func()) { + return context.WithCancel(ctx) +} + +func requestWithContext(req *http.Request, ctx contextContext) *http.Request { + return req.WithContext(ctx) +} + +type clientTrace httptrace.ClientTrace + +func reqContext(r *http.Request) context.Context { return r.Context() } + +func (t *Transport) idleConnTimeout() time.Duration { + if t.t1 != nil { + return t.t1.IdleConnTimeout + } + return 0 +} + +func setResponseUncompressed(res *http.Response) { res.Uncompressed = true } + +func traceGotConn(req *http.Request, cc *ClientConn) { + trace := httptrace.ContextClientTrace(req.Context()) + if trace == nil || trace.GotConn == nil { + return + } + ci := httptrace.GotConnInfo{Conn: cc.tconn} + cc.mu.Lock() + ci.Reused = cc.nextStreamID > 1 + ci.WasIdle = len(cc.streams) == 0 && ci.Reused + if ci.WasIdle && !cc.lastActive.IsZero() { + ci.IdleTime = time.Now().Sub(cc.lastActive) + } + cc.mu.Unlock() + + trace.GotConn(ci) +} + +func traceWroteHeaders(trace *clientTrace) { + if trace != nil && trace.WroteHeaders != nil { + trace.WroteHeaders() + } +} + +func traceGot100Continue(trace *clientTrace) { + if trace != nil && trace.Got100Continue != nil { + trace.Got100Continue() + } +} + +func traceWait100Continue(trace *clientTrace) { + if trace != nil && trace.Wait100Continue != nil { + trace.Wait100Continue() + } +} + +func traceWroteRequest(trace *clientTrace, err error) { + if trace != nil && trace.WroteRequest != nil { + trace.WroteRequest(httptrace.WroteRequestInfo{Err: err}) + } +} + +func traceFirstResponseByte(trace *clientTrace) { + if trace != nil && trace.GotFirstResponseByte != nil { + trace.GotFirstResponseByte() + } +} + +func requestTrace(req *http.Request) *clientTrace { + trace := httptrace.ContextClientTrace(req.Context()) + return (*clientTrace)(trace) +} + +// Ping sends a PING frame to the server and waits for the ack. +func (cc *ClientConn) Ping(ctx context.Context) error { + return cc.ping(ctx) +} diff --git a/vendor/golang.org/x/net/http2/go17_not18.go b/vendor/golang.org/x/net/http2/go17_not18.go new file mode 100644 index 0000000..b4c52ec --- /dev/null +++ b/vendor/golang.org/x/net/http2/go17_not18.go @@ -0,0 +1,36 @@ +// Copyright 2016 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +// +build go1.7,!go1.8 + +package http2 + +import "crypto/tls" + +// temporary copy of Go 1.7's private tls.Config.clone: +func cloneTLSConfig(c *tls.Config) *tls.Config { + return &tls.Config{ + Rand: c.Rand, + Time: c.Time, + Certificates: c.Certificates, + NameToCertificate: c.NameToCertificate, + GetCertificate: c.GetCertificate, + RootCAs: c.RootCAs, + NextProtos: c.NextProtos, + ServerName: c.ServerName, + ClientAuth: c.ClientAuth, + ClientCAs: c.ClientCAs, + InsecureSkipVerify: c.InsecureSkipVerify, + CipherSuites: c.CipherSuites, + PreferServerCipherSuites: c.PreferServerCipherSuites, + SessionTicketsDisabled: c.SessionTicketsDisabled, + SessionTicketKey: c.SessionTicketKey, + ClientSessionCache: c.ClientSessionCache, + MinVersion: c.MinVersion, + MaxVersion: c.MaxVersion, + CurvePreferences: c.CurvePreferences, + DynamicRecordSizingDisabled: c.DynamicRecordSizingDisabled, + Renegotiation: c.Renegotiation, + } +} diff --git a/vendor/golang.org/x/net/http2/go18.go b/vendor/golang.org/x/net/http2/go18.go new file mode 100644 index 0000000..633202c --- /dev/null +++ b/vendor/golang.org/x/net/http2/go18.go @@ -0,0 +1,50 @@ +// Copyright 2015 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +// +build go1.8 + +package http2 + +import ( + "crypto/tls" + "io" + "net/http" +) + +func cloneTLSConfig(c *tls.Config) *tls.Config { return c.Clone() } + +var _ http.Pusher = (*responseWriter)(nil) + +// Push implements http.Pusher. +func (w *responseWriter) Push(target string, opts *http.PushOptions) error { + internalOpts := pushOptions{} + if opts != nil { + internalOpts.Method = opts.Method + internalOpts.Header = opts.Header + } + return w.push(target, internalOpts) +} + +func configureServer18(h1 *http.Server, h2 *Server) error { + if h2.IdleTimeout == 0 { + if h1.IdleTimeout != 0 { + h2.IdleTimeout = h1.IdleTimeout + } else { + h2.IdleTimeout = h1.ReadTimeout + } + } + return nil +} + +func shouldLogPanic(panicValue interface{}) bool { + return panicValue != nil && panicValue != http.ErrAbortHandler +} + +func reqGetBody(req *http.Request) func() (io.ReadCloser, error) { + return req.GetBody +} + +func reqBodyIsNoBody(body io.ReadCloser) bool { + return body == http.NoBody +} diff --git a/vendor/golang.org/x/net/http2/go18_test.go b/vendor/golang.org/x/net/http2/go18_test.go new file mode 100644 index 0000000..8365505 --- /dev/null +++ b/vendor/golang.org/x/net/http2/go18_test.go @@ -0,0 +1,66 @@ +// Copyright 2016 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +// +build go1.8 + +package http2 + +import ( + "net/http" + "testing" + "time" +) + +// Tests that http2.Server.IdleTimeout is initialized from +// http.Server.{Idle,Read}Timeout. http.Server.IdleTimeout was +// added in Go 1.8. +func TestConfigureServerIdleTimeout_Go18(t *testing.T) { + const timeout = 5 * time.Second + const notThisOne = 1 * time.Second + + // With a zero http2.Server, verify that it copies IdleTimeout: + { + s1 := &http.Server{ + IdleTimeout: timeout, + ReadTimeout: notThisOne, + } + s2 := &Server{} + if err := ConfigureServer(s1, s2); err != nil { + t.Fatal(err) + } + if s2.IdleTimeout != timeout { + t.Errorf("s2.IdleTimeout = %v; want %v", s2.IdleTimeout, timeout) + } + } + + // And that it falls back to ReadTimeout: + { + s1 := &http.Server{ + ReadTimeout: timeout, + } + s2 := &Server{} + if err := ConfigureServer(s1, s2); err != nil { + t.Fatal(err) + } + if s2.IdleTimeout != timeout { + t.Errorf("s2.IdleTimeout = %v; want %v", s2.IdleTimeout, timeout) + } + } + + // Verify that s1's IdleTimeout doesn't overwrite an existing setting: + { + s1 := &http.Server{ + IdleTimeout: notThisOne, + } + s2 := &Server{ + IdleTimeout: timeout, + } + if err := ConfigureServer(s1, s2); err != nil { + t.Fatal(err) + } + if s2.IdleTimeout != timeout { + t.Errorf("s2.IdleTimeout = %v; want %v", s2.IdleTimeout, timeout) + } + } +} diff --git a/vendor/golang.org/x/net/http2/gotrack.go b/vendor/golang.org/x/net/http2/gotrack.go new file mode 100644 index 0000000..9933c9f --- /dev/null +++ b/vendor/golang.org/x/net/http2/gotrack.go @@ -0,0 +1,170 @@ +// Copyright 2014 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +// Defensive debug-only utility to track that functions run on the +// goroutine that they're supposed to. + +package http2 + +import ( + "bytes" + "errors" + "fmt" + "os" + "runtime" + "strconv" + "sync" +) + +var DebugGoroutines = os.Getenv("DEBUG_HTTP2_GOROUTINES") == "1" + +type goroutineLock uint64 + +func newGoroutineLock() goroutineLock { + if !DebugGoroutines { + return 0 + } + return goroutineLock(curGoroutineID()) +} + +func (g goroutineLock) check() { + if !DebugGoroutines { + return + } + if curGoroutineID() != uint64(g) { + panic("running on the wrong goroutine") + } +} + +func (g goroutineLock) checkNotOn() { + if !DebugGoroutines { + return + } + if curGoroutineID() == uint64(g) { + panic("running on the wrong goroutine") + } +} + +var goroutineSpace = []byte("goroutine ") + +func curGoroutineID() uint64 { + bp := littleBuf.Get().(*[]byte) + defer littleBuf.Put(bp) + b := *bp + b = b[:runtime.Stack(b, false)] + // Parse the 4707 out of "goroutine 4707 [" + b = bytes.TrimPrefix(b, goroutineSpace) + i := bytes.IndexByte(b, ' ') + if i < 0 { + panic(fmt.Sprintf("No space found in %q", b)) + } + b = b[:i] + n, err := parseUintBytes(b, 10, 64) + if err != nil { + panic(fmt.Sprintf("Failed to parse goroutine ID out of %q: %v", b, err)) + } + return n +} + +var littleBuf = sync.Pool{ + New: func() interface{} { + buf := make([]byte, 64) + return &buf + }, +} + +// parseUintBytes is like strconv.ParseUint, but using a []byte. +func parseUintBytes(s []byte, base int, bitSize int) (n uint64, err error) { + var cutoff, maxVal uint64 + + if bitSize == 0 { + bitSize = int(strconv.IntSize) + } + + s0 := s + switch { + case len(s) < 1: + err = strconv.ErrSyntax + goto Error + + case 2 <= base && base <= 36: + // valid base; nothing to do + + case base == 0: + // Look for octal, hex prefix. + switch { + case s[0] == '0' && len(s) > 1 && (s[1] == 'x' || s[1] == 'X'): + base = 16 + s = s[2:] + if len(s) < 1 { + err = strconv.ErrSyntax + goto Error + } + case s[0] == '0': + base = 8 + default: + base = 10 + } + + default: + err = errors.New("invalid base " + strconv.Itoa(base)) + goto Error + } + + n = 0 + cutoff = cutoff64(base) + maxVal = 1<= base { + n = 0 + err = strconv.ErrSyntax + goto Error + } + + if n >= cutoff { + // n*base overflows + n = 1<<64 - 1 + err = strconv.ErrRange + goto Error + } + n *= uint64(base) + + n1 := n + uint64(v) + if n1 < n || n1 > maxVal { + // n+v overflows + n = 1<<64 - 1 + err = strconv.ErrRange + goto Error + } + n = n1 + } + + return n, nil + +Error: + return n, &strconv.NumError{Func: "ParseUint", Num: string(s0), Err: err} +} + +// Return the first number n such that n*base >= 1<<64. +func cutoff64(base int) uint64 { + if base < 2 { + return 0 + } + return (1<<64-1)/uint64(base) + 1 +} diff --git a/vendor/golang.org/x/net/http2/headermap.go b/vendor/golang.org/x/net/http2/headermap.go new file mode 100644 index 0000000..c2805f6 --- /dev/null +++ b/vendor/golang.org/x/net/http2/headermap.go @@ -0,0 +1,78 @@ +// Copyright 2014 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package http2 + +import ( + "net/http" + "strings" +) + +var ( + commonLowerHeader = map[string]string{} // Go-Canonical-Case -> lower-case + commonCanonHeader = map[string]string{} // lower-case -> Go-Canonical-Case +) + +func init() { + for _, v := range []string{ + "accept", + "accept-charset", + "accept-encoding", + "accept-language", + "accept-ranges", + "age", + "access-control-allow-origin", + "allow", + "authorization", + "cache-control", + "content-disposition", + "content-encoding", + "content-language", + "content-length", + "content-location", + "content-range", + "content-type", + "cookie", + "date", + "etag", + "expect", + "expires", + "from", + "host", + "if-match", + "if-modified-since", + "if-none-match", + "if-unmodified-since", + "last-modified", + "link", + "location", + "max-forwards", + "proxy-authenticate", + "proxy-authorization", + "range", + "referer", + "refresh", + "retry-after", + "server", + "set-cookie", + "strict-transport-security", + "trailer", + "transfer-encoding", + "user-agent", + "vary", + "via", + "www-authenticate", + } { + chk := http.CanonicalHeaderKey(v) + commonLowerHeader[chk] = v + commonCanonHeader[v] = chk + } +} + +func lowerHeader(v string) string { + if s, ok := commonLowerHeader[v]; ok { + return s + } + return strings.ToLower(v) +} diff --git a/vendor/golang.org/x/net/http2/hpack/encode.go b/vendor/golang.org/x/net/http2/hpack/encode.go new file mode 100644 index 0000000..f9bb033 --- /dev/null +++ b/vendor/golang.org/x/net/http2/hpack/encode.go @@ -0,0 +1,251 @@ +// Copyright 2014 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package hpack + +import ( + "io" +) + +const ( + uint32Max = ^uint32(0) + initialHeaderTableSize = 4096 +) + +type Encoder struct { + dynTab dynamicTable + // minSize is the minimum table size set by + // SetMaxDynamicTableSize after the previous Header Table Size + // Update. + minSize uint32 + // maxSizeLimit is the maximum table size this encoder + // supports. This will protect the encoder from too large + // size. + maxSizeLimit uint32 + // tableSizeUpdate indicates whether "Header Table Size + // Update" is required. + tableSizeUpdate bool + w io.Writer + buf []byte +} + +// NewEncoder returns a new Encoder which performs HPACK encoding. An +// encoded data is written to w. +func NewEncoder(w io.Writer) *Encoder { + e := &Encoder{ + minSize: uint32Max, + maxSizeLimit: initialHeaderTableSize, + tableSizeUpdate: false, + w: w, + } + e.dynTab.setMaxSize(initialHeaderTableSize) + return e +} + +// WriteField encodes f into a single Write to e's underlying Writer. +// This function may also produce bytes for "Header Table Size Update" +// if necessary. If produced, it is done before encoding f. +func (e *Encoder) WriteField(f HeaderField) error { + e.buf = e.buf[:0] + + if e.tableSizeUpdate { + e.tableSizeUpdate = false + if e.minSize < e.dynTab.maxSize { + e.buf = appendTableSize(e.buf, e.minSize) + } + e.minSize = uint32Max + e.buf = appendTableSize(e.buf, e.dynTab.maxSize) + } + + idx, nameValueMatch := e.searchTable(f) + if nameValueMatch { + e.buf = appendIndexed(e.buf, idx) + } else { + indexing := e.shouldIndex(f) + if indexing { + e.dynTab.add(f) + } + + if idx == 0 { + e.buf = appendNewName(e.buf, f, indexing) + } else { + e.buf = appendIndexedName(e.buf, f, idx, indexing) + } + } + n, err := e.w.Write(e.buf) + if err == nil && n != len(e.buf) { + err = io.ErrShortWrite + } + return err +} + +// searchTable searches f in both stable and dynamic header tables. +// The static header table is searched first. Only when there is no +// exact match for both name and value, the dynamic header table is +// then searched. If there is no match, i is 0. If both name and value +// match, i is the matched index and nameValueMatch becomes true. If +// only name matches, i points to that index and nameValueMatch +// becomes false. +func (e *Encoder) searchTable(f HeaderField) (i uint64, nameValueMatch bool) { + for idx, hf := range staticTable { + if !constantTimeStringCompare(hf.Name, f.Name) { + continue + } + if i == 0 { + i = uint64(idx + 1) + } + if f.Sensitive { + continue + } + if !constantTimeStringCompare(hf.Value, f.Value) { + continue + } + i = uint64(idx + 1) + nameValueMatch = true + return + } + + j, nameValueMatch := e.dynTab.search(f) + if nameValueMatch || (i == 0 && j != 0) { + i = j + uint64(len(staticTable)) + } + return +} + +// SetMaxDynamicTableSize changes the dynamic header table size to v. +// The actual size is bounded by the value passed to +// SetMaxDynamicTableSizeLimit. +func (e *Encoder) SetMaxDynamicTableSize(v uint32) { + if v > e.maxSizeLimit { + v = e.maxSizeLimit + } + if v < e.minSize { + e.minSize = v + } + e.tableSizeUpdate = true + e.dynTab.setMaxSize(v) +} + +// SetMaxDynamicTableSizeLimit changes the maximum value that can be +// specified in SetMaxDynamicTableSize to v. By default, it is set to +// 4096, which is the same size of the default dynamic header table +// size described in HPACK specification. If the current maximum +// dynamic header table size is strictly greater than v, "Header Table +// Size Update" will be done in the next WriteField call and the +// maximum dynamic header table size is truncated to v. +func (e *Encoder) SetMaxDynamicTableSizeLimit(v uint32) { + e.maxSizeLimit = v + if e.dynTab.maxSize > v { + e.tableSizeUpdate = true + e.dynTab.setMaxSize(v) + } +} + +// shouldIndex reports whether f should be indexed. +func (e *Encoder) shouldIndex(f HeaderField) bool { + return !f.Sensitive && f.Size() <= e.dynTab.maxSize +} + +// appendIndexed appends index i, as encoded in "Indexed Header Field" +// representation, to dst and returns the extended buffer. +func appendIndexed(dst []byte, i uint64) []byte { + first := len(dst) + dst = appendVarInt(dst, 7, i) + dst[first] |= 0x80 + return dst +} + +// appendNewName appends f, as encoded in one of "Literal Header field +// - New Name" representation variants, to dst and returns the +// extended buffer. +// +// If f.Sensitive is true, "Never Indexed" representation is used. If +// f.Sensitive is false and indexing is true, "Inremental Indexing" +// representation is used. +func appendNewName(dst []byte, f HeaderField, indexing bool) []byte { + dst = append(dst, encodeTypeByte(indexing, f.Sensitive)) + dst = appendHpackString(dst, f.Name) + return appendHpackString(dst, f.Value) +} + +// appendIndexedName appends f and index i referring indexed name +// entry, as encoded in one of "Literal Header field - Indexed Name" +// representation variants, to dst and returns the extended buffer. +// +// If f.Sensitive is true, "Never Indexed" representation is used. If +// f.Sensitive is false and indexing is true, "Incremental Indexing" +// representation is used. +func appendIndexedName(dst []byte, f HeaderField, i uint64, indexing bool) []byte { + first := len(dst) + var n byte + if indexing { + n = 6 + } else { + n = 4 + } + dst = appendVarInt(dst, n, i) + dst[first] |= encodeTypeByte(indexing, f.Sensitive) + return appendHpackString(dst, f.Value) +} + +// appendTableSize appends v, as encoded in "Header Table Size Update" +// representation, to dst and returns the extended buffer. +func appendTableSize(dst []byte, v uint32) []byte { + first := len(dst) + dst = appendVarInt(dst, 5, uint64(v)) + dst[first] |= 0x20 + return dst +} + +// appendVarInt appends i, as encoded in variable integer form using n +// bit prefix, to dst and returns the extended buffer. +// +// See +// http://http2.github.io/http2-spec/compression.html#integer.representation +func appendVarInt(dst []byte, n byte, i uint64) []byte { + k := uint64((1 << n) - 1) + if i < k { + return append(dst, byte(i)) + } + dst = append(dst, byte(k)) + i -= k + for ; i >= 128; i >>= 7 { + dst = append(dst, byte(0x80|(i&0x7f))) + } + return append(dst, byte(i)) +} + +// appendHpackString appends s, as encoded in "String Literal" +// representation, to dst and returns the the extended buffer. +// +// s will be encoded in Huffman codes only when it produces strictly +// shorter byte string. +func appendHpackString(dst []byte, s string) []byte { + huffmanLength := HuffmanEncodeLength(s) + if huffmanLength < uint64(len(s)) { + first := len(dst) + dst = appendVarInt(dst, 7, huffmanLength) + dst = AppendHuffmanString(dst, s) + dst[first] |= 0x80 + } else { + dst = appendVarInt(dst, 7, uint64(len(s))) + dst = append(dst, s...) + } + return dst +} + +// encodeTypeByte returns type byte. If sensitive is true, type byte +// for "Never Indexed" representation is returned. If sensitive is +// false and indexing is true, type byte for "Incremental Indexing" +// representation is returned. Otherwise, type byte for "Without +// Indexing" is returned. +func encodeTypeByte(indexing, sensitive bool) byte { + if sensitive { + return 0x10 + } + if indexing { + return 0x40 + } + return 0 +} diff --git a/vendor/golang.org/x/net/http2/hpack/hpack.go b/vendor/golang.org/x/net/http2/hpack/hpack.go new file mode 100644 index 0000000..135b9f6 --- /dev/null +++ b/vendor/golang.org/x/net/http2/hpack/hpack.go @@ -0,0 +1,542 @@ +// Copyright 2014 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +// Package hpack implements HPACK, a compression format for +// efficiently representing HTTP header fields in the context of HTTP/2. +// +// See http://tools.ietf.org/html/draft-ietf-httpbis-header-compression-09 +package hpack + +import ( + "bytes" + "errors" + "fmt" +) + +// A DecodingError is something the spec defines as a decoding error. +type DecodingError struct { + Err error +} + +func (de DecodingError) Error() string { + return fmt.Sprintf("decoding error: %v", de.Err) +} + +// An InvalidIndexError is returned when an encoder references a table +// entry before the static table or after the end of the dynamic table. +type InvalidIndexError int + +func (e InvalidIndexError) Error() string { + return fmt.Sprintf("invalid indexed representation index %d", int(e)) +} + +// A HeaderField is a name-value pair. Both the name and value are +// treated as opaque sequences of octets. +type HeaderField struct { + Name, Value string + + // Sensitive means that this header field should never be + // indexed. + Sensitive bool +} + +// IsPseudo reports whether the header field is an http2 pseudo header. +// That is, it reports whether it starts with a colon. +// It is not otherwise guaranteed to be a valid pseudo header field, +// though. +func (hf HeaderField) IsPseudo() bool { + return len(hf.Name) != 0 && hf.Name[0] == ':' +} + +func (hf HeaderField) String() string { + var suffix string + if hf.Sensitive { + suffix = " (sensitive)" + } + return fmt.Sprintf("header field %q = %q%s", hf.Name, hf.Value, suffix) +} + +// Size returns the size of an entry per RFC 7541 section 4.1. +func (hf HeaderField) Size() uint32 { + // http://http2.github.io/http2-spec/compression.html#rfc.section.4.1 + // "The size of the dynamic table is the sum of the size of + // its entries. The size of an entry is the sum of its name's + // length in octets (as defined in Section 5.2), its value's + // length in octets (see Section 5.2), plus 32. The size of + // an entry is calculated using the length of the name and + // value without any Huffman encoding applied." + + // This can overflow if somebody makes a large HeaderField + // Name and/or Value by hand, but we don't care, because that + // won't happen on the wire because the encoding doesn't allow + // it. + return uint32(len(hf.Name) + len(hf.Value) + 32) +} + +// A Decoder is the decoding context for incremental processing of +// header blocks. +type Decoder struct { + dynTab dynamicTable + emit func(f HeaderField) + + emitEnabled bool // whether calls to emit are enabled + maxStrLen int // 0 means unlimited + + // buf is the unparsed buffer. It's only written to + // saveBuf if it was truncated in the middle of a header + // block. Because it's usually not owned, we can only + // process it under Write. + buf []byte // not owned; only valid during Write + + // saveBuf is previous data passed to Write which we weren't able + // to fully parse before. Unlike buf, we own this data. + saveBuf bytes.Buffer +} + +// NewDecoder returns a new decoder with the provided maximum dynamic +// table size. The emitFunc will be called for each valid field +// parsed, in the same goroutine as calls to Write, before Write returns. +func NewDecoder(maxDynamicTableSize uint32, emitFunc func(f HeaderField)) *Decoder { + d := &Decoder{ + emit: emitFunc, + emitEnabled: true, + } + d.dynTab.allowedMaxSize = maxDynamicTableSize + d.dynTab.setMaxSize(maxDynamicTableSize) + return d +} + +// ErrStringLength is returned by Decoder.Write when the max string length +// (as configured by Decoder.SetMaxStringLength) would be violated. +var ErrStringLength = errors.New("hpack: string too long") + +// SetMaxStringLength sets the maximum size of a HeaderField name or +// value string. If a string exceeds this length (even after any +// decompression), Write will return ErrStringLength. +// A value of 0 means unlimited and is the default from NewDecoder. +func (d *Decoder) SetMaxStringLength(n int) { + d.maxStrLen = n +} + +// SetEmitFunc changes the callback used when new header fields +// are decoded. +// It must be non-nil. It does not affect EmitEnabled. +func (d *Decoder) SetEmitFunc(emitFunc func(f HeaderField)) { + d.emit = emitFunc +} + +// SetEmitEnabled controls whether the emitFunc provided to NewDecoder +// should be called. The default is true. +// +// This facility exists to let servers enforce MAX_HEADER_LIST_SIZE +// while still decoding and keeping in-sync with decoder state, but +// without doing unnecessary decompression or generating unnecessary +// garbage for header fields past the limit. +func (d *Decoder) SetEmitEnabled(v bool) { d.emitEnabled = v } + +// EmitEnabled reports whether calls to the emitFunc provided to NewDecoder +// are currently enabled. The default is true. +func (d *Decoder) EmitEnabled() bool { return d.emitEnabled } + +// TODO: add method *Decoder.Reset(maxSize, emitFunc) to let callers re-use Decoders and their +// underlying buffers for garbage reasons. + +func (d *Decoder) SetMaxDynamicTableSize(v uint32) { + d.dynTab.setMaxSize(v) +} + +// SetAllowedMaxDynamicTableSize sets the upper bound that the encoded +// stream (via dynamic table size updates) may set the maximum size +// to. +func (d *Decoder) SetAllowedMaxDynamicTableSize(v uint32) { + d.dynTab.allowedMaxSize = v +} + +type dynamicTable struct { + // ents is the FIFO described at + // http://http2.github.io/http2-spec/compression.html#rfc.section.2.3.2 + // The newest (low index) is append at the end, and items are + // evicted from the front. + ents []HeaderField + size uint32 + maxSize uint32 // current maxSize + allowedMaxSize uint32 // maxSize may go up to this, inclusive +} + +func (dt *dynamicTable) setMaxSize(v uint32) { + dt.maxSize = v + dt.evict() +} + +// TODO: change dynamicTable to be a struct with a slice and a size int field, +// per http://http2.github.io/http2-spec/compression.html#rfc.section.4.1: +// +// +// Then make add increment the size. maybe the max size should move from Decoder to +// dynamicTable and add should return an ok bool if there was enough space. +// +// Later we'll need a remove operation on dynamicTable. + +func (dt *dynamicTable) add(f HeaderField) { + dt.ents = append(dt.ents, f) + dt.size += f.Size() + dt.evict() +} + +// If we're too big, evict old stuff (front of the slice) +func (dt *dynamicTable) evict() { + base := dt.ents // keep base pointer of slice + for dt.size > dt.maxSize { + dt.size -= dt.ents[0].Size() + dt.ents = dt.ents[1:] + } + + // Shift slice contents down if we evicted things. + if len(dt.ents) != len(base) { + copy(base, dt.ents) + dt.ents = base[:len(dt.ents)] + } +} + +// constantTimeStringCompare compares string a and b in a constant +// time manner. +func constantTimeStringCompare(a, b string) bool { + if len(a) != len(b) { + return false + } + + c := byte(0) + + for i := 0; i < len(a); i++ { + c |= a[i] ^ b[i] + } + + return c == 0 +} + +// Search searches f in the table. The return value i is 0 if there is +// no name match. If there is name match or name/value match, i is the +// index of that entry (1-based). If both name and value match, +// nameValueMatch becomes true. +func (dt *dynamicTable) search(f HeaderField) (i uint64, nameValueMatch bool) { + l := len(dt.ents) + for j := l - 1; j >= 0; j-- { + ent := dt.ents[j] + if !constantTimeStringCompare(ent.Name, f.Name) { + continue + } + if i == 0 { + i = uint64(l - j) + } + if f.Sensitive { + continue + } + if !constantTimeStringCompare(ent.Value, f.Value) { + continue + } + i = uint64(l - j) + nameValueMatch = true + return + } + return +} + +func (d *Decoder) maxTableIndex() int { + return len(d.dynTab.ents) + len(staticTable) +} + +func (d *Decoder) at(i uint64) (hf HeaderField, ok bool) { + if i < 1 { + return + } + if i > uint64(d.maxTableIndex()) { + return + } + if i <= uint64(len(staticTable)) { + return staticTable[i-1], true + } + dents := d.dynTab.ents + return dents[len(dents)-(int(i)-len(staticTable))], true +} + +// Decode decodes an entire block. +// +// TODO: remove this method and make it incremental later? This is +// easier for debugging now. +func (d *Decoder) DecodeFull(p []byte) ([]HeaderField, error) { + var hf []HeaderField + saveFunc := d.emit + defer func() { d.emit = saveFunc }() + d.emit = func(f HeaderField) { hf = append(hf, f) } + if _, err := d.Write(p); err != nil { + return nil, err + } + if err := d.Close(); err != nil { + return nil, err + } + return hf, nil +} + +func (d *Decoder) Close() error { + if d.saveBuf.Len() > 0 { + d.saveBuf.Reset() + return DecodingError{errors.New("truncated headers")} + } + return nil +} + +func (d *Decoder) Write(p []byte) (n int, err error) { + if len(p) == 0 { + // Prevent state machine CPU attacks (making us redo + // work up to the point of finding out we don't have + // enough data) + return + } + // Only copy the data if we have to. Optimistically assume + // that p will contain a complete header block. + if d.saveBuf.Len() == 0 { + d.buf = p + } else { + d.saveBuf.Write(p) + d.buf = d.saveBuf.Bytes() + d.saveBuf.Reset() + } + + for len(d.buf) > 0 { + err = d.parseHeaderFieldRepr() + if err == errNeedMore { + // Extra paranoia, making sure saveBuf won't + // get too large. All the varint and string + // reading code earlier should already catch + // overlong things and return ErrStringLength, + // but keep this as a last resort. + const varIntOverhead = 8 // conservative + if d.maxStrLen != 0 && int64(len(d.buf)) > 2*(int64(d.maxStrLen)+varIntOverhead) { + return 0, ErrStringLength + } + d.saveBuf.Write(d.buf) + return len(p), nil + } + if err != nil { + break + } + } + return len(p), err +} + +// errNeedMore is an internal sentinel error value that means the +// buffer is truncated and we need to read more data before we can +// continue parsing. +var errNeedMore = errors.New("need more data") + +type indexType int + +const ( + indexedTrue indexType = iota + indexedFalse + indexedNever +) + +func (v indexType) indexed() bool { return v == indexedTrue } +func (v indexType) sensitive() bool { return v == indexedNever } + +// returns errNeedMore if there isn't enough data available. +// any other error is fatal. +// consumes d.buf iff it returns nil. +// precondition: must be called with len(d.buf) > 0 +func (d *Decoder) parseHeaderFieldRepr() error { + b := d.buf[0] + switch { + case b&128 != 0: + // Indexed representation. + // High bit set? + // http://http2.github.io/http2-spec/compression.html#rfc.section.6.1 + return d.parseFieldIndexed() + case b&192 == 64: + // 6.2.1 Literal Header Field with Incremental Indexing + // 0b10xxxxxx: top two bits are 10 + // http://http2.github.io/http2-spec/compression.html#rfc.section.6.2.1 + return d.parseFieldLiteral(6, indexedTrue) + case b&240 == 0: + // 6.2.2 Literal Header Field without Indexing + // 0b0000xxxx: top four bits are 0000 + // http://http2.github.io/http2-spec/compression.html#rfc.section.6.2.2 + return d.parseFieldLiteral(4, indexedFalse) + case b&240 == 16: + // 6.2.3 Literal Header Field never Indexed + // 0b0001xxxx: top four bits are 0001 + // http://http2.github.io/http2-spec/compression.html#rfc.section.6.2.3 + return d.parseFieldLiteral(4, indexedNever) + case b&224 == 32: + // 6.3 Dynamic Table Size Update + // Top three bits are '001'. + // http://http2.github.io/http2-spec/compression.html#rfc.section.6.3 + return d.parseDynamicTableSizeUpdate() + } + + return DecodingError{errors.New("invalid encoding")} +} + +// (same invariants and behavior as parseHeaderFieldRepr) +func (d *Decoder) parseFieldIndexed() error { + buf := d.buf + idx, buf, err := readVarInt(7, buf) + if err != nil { + return err + } + hf, ok := d.at(idx) + if !ok { + return DecodingError{InvalidIndexError(idx)} + } + d.buf = buf + return d.callEmit(HeaderField{Name: hf.Name, Value: hf.Value}) +} + +// (same invariants and behavior as parseHeaderFieldRepr) +func (d *Decoder) parseFieldLiteral(n uint8, it indexType) error { + buf := d.buf + nameIdx, buf, err := readVarInt(n, buf) + if err != nil { + return err + } + + var hf HeaderField + wantStr := d.emitEnabled || it.indexed() + if nameIdx > 0 { + ihf, ok := d.at(nameIdx) + if !ok { + return DecodingError{InvalidIndexError(nameIdx)} + } + hf.Name = ihf.Name + } else { + hf.Name, buf, err = d.readString(buf, wantStr) + if err != nil { + return err + } + } + hf.Value, buf, err = d.readString(buf, wantStr) + if err != nil { + return err + } + d.buf = buf + if it.indexed() { + d.dynTab.add(hf) + } + hf.Sensitive = it.sensitive() + return d.callEmit(hf) +} + +func (d *Decoder) callEmit(hf HeaderField) error { + if d.maxStrLen != 0 { + if len(hf.Name) > d.maxStrLen || len(hf.Value) > d.maxStrLen { + return ErrStringLength + } + } + if d.emitEnabled { + d.emit(hf) + } + return nil +} + +// (same invariants and behavior as parseHeaderFieldRepr) +func (d *Decoder) parseDynamicTableSizeUpdate() error { + buf := d.buf + size, buf, err := readVarInt(5, buf) + if err != nil { + return err + } + if size > uint64(d.dynTab.allowedMaxSize) { + return DecodingError{errors.New("dynamic table size update too large")} + } + d.dynTab.setMaxSize(uint32(size)) + d.buf = buf + return nil +} + +var errVarintOverflow = DecodingError{errors.New("varint integer overflow")} + +// readVarInt reads an unsigned variable length integer off the +// beginning of p. n is the parameter as described in +// http://http2.github.io/http2-spec/compression.html#rfc.section.5.1. +// +// n must always be between 1 and 8. +// +// The returned remain buffer is either a smaller suffix of p, or err != nil. +// The error is errNeedMore if p doesn't contain a complete integer. +func readVarInt(n byte, p []byte) (i uint64, remain []byte, err error) { + if n < 1 || n > 8 { + panic("bad n") + } + if len(p) == 0 { + return 0, p, errNeedMore + } + i = uint64(p[0]) + if n < 8 { + i &= (1 << uint64(n)) - 1 + } + if i < (1< 0 { + b := p[0] + p = p[1:] + i += uint64(b&127) << m + if b&128 == 0 { + return i, p, nil + } + m += 7 + if m >= 63 { // TODO: proper overflow check. making this up. + return 0, origP, errVarintOverflow + } + } + return 0, origP, errNeedMore +} + +// readString decodes an hpack string from p. +// +// wantStr is whether s will be used. If false, decompression and +// []byte->string garbage are skipped if s will be ignored +// anyway. This does mean that huffman decoding errors for non-indexed +// strings past the MAX_HEADER_LIST_SIZE are ignored, but the server +// is returning an error anyway, and because they're not indexed, the error +// won't affect the decoding state. +func (d *Decoder) readString(p []byte, wantStr bool) (s string, remain []byte, err error) { + if len(p) == 0 { + return "", p, errNeedMore + } + isHuff := p[0]&128 != 0 + strLen, p, err := readVarInt(7, p) + if err != nil { + return "", p, err + } + if d.maxStrLen != 0 && strLen > uint64(d.maxStrLen) { + return "", nil, ErrStringLength + } + if uint64(len(p)) < strLen { + return "", p, errNeedMore + } + if !isHuff { + if wantStr { + s = string(p[:strLen]) + } + return s, p[strLen:], nil + } + + if wantStr { + buf := bufPool.Get().(*bytes.Buffer) + buf.Reset() // don't trust others + defer bufPool.Put(buf) + if err := huffmanDecode(buf, d.maxStrLen, p[:strLen]); err != nil { + buf.Reset() + return "", nil, err + } + s = buf.String() + buf.Reset() // be nice to GC + } + return s, p[strLen:], nil +} diff --git a/vendor/golang.org/x/net/http2/hpack/huffman.go b/vendor/golang.org/x/net/http2/hpack/huffman.go new file mode 100644 index 0000000..8850e39 --- /dev/null +++ b/vendor/golang.org/x/net/http2/hpack/huffman.go @@ -0,0 +1,212 @@ +// Copyright 2014 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package hpack + +import ( + "bytes" + "errors" + "io" + "sync" +) + +var bufPool = sync.Pool{ + New: func() interface{} { return new(bytes.Buffer) }, +} + +// HuffmanDecode decodes the string in v and writes the expanded +// result to w, returning the number of bytes written to w and the +// Write call's return value. At most one Write call is made. +func HuffmanDecode(w io.Writer, v []byte) (int, error) { + buf := bufPool.Get().(*bytes.Buffer) + buf.Reset() + defer bufPool.Put(buf) + if err := huffmanDecode(buf, 0, v); err != nil { + return 0, err + } + return w.Write(buf.Bytes()) +} + +// HuffmanDecodeToString decodes the string in v. +func HuffmanDecodeToString(v []byte) (string, error) { + buf := bufPool.Get().(*bytes.Buffer) + buf.Reset() + defer bufPool.Put(buf) + if err := huffmanDecode(buf, 0, v); err != nil { + return "", err + } + return buf.String(), nil +} + +// ErrInvalidHuffman is returned for errors found decoding +// Huffman-encoded strings. +var ErrInvalidHuffman = errors.New("hpack: invalid Huffman-encoded data") + +// huffmanDecode decodes v to buf. +// If maxLen is greater than 0, attempts to write more to buf than +// maxLen bytes will return ErrStringLength. +func huffmanDecode(buf *bytes.Buffer, maxLen int, v []byte) error { + n := rootHuffmanNode + // cur is the bit buffer that has not been fed into n. + // cbits is the number of low order bits in cur that are valid. + // sbits is the number of bits of the symbol prefix being decoded. + cur, cbits, sbits := uint(0), uint8(0), uint8(0) + for _, b := range v { + cur = cur<<8 | uint(b) + cbits += 8 + sbits += 8 + for cbits >= 8 { + idx := byte(cur >> (cbits - 8)) + n = n.children[idx] + if n == nil { + return ErrInvalidHuffman + } + if n.children == nil { + if maxLen != 0 && buf.Len() == maxLen { + return ErrStringLength + } + buf.WriteByte(n.sym) + cbits -= n.codeLen + n = rootHuffmanNode + sbits = cbits + } else { + cbits -= 8 + } + } + } + for cbits > 0 { + n = n.children[byte(cur<<(8-cbits))] + if n == nil { + return ErrInvalidHuffman + } + if n.children != nil || n.codeLen > cbits { + break + } + if maxLen != 0 && buf.Len() == maxLen { + return ErrStringLength + } + buf.WriteByte(n.sym) + cbits -= n.codeLen + n = rootHuffmanNode + sbits = cbits + } + if sbits > 7 { + // Either there was an incomplete symbol, or overlong padding. + // Both are decoding errors per RFC 7541 section 5.2. + return ErrInvalidHuffman + } + if mask := uint(1< 8 { + codeLen -= 8 + i := uint8(code >> codeLen) + if cur.children[i] == nil { + cur.children[i] = newInternalNode() + } + cur = cur.children[i] + } + shift := 8 - codeLen + start, end := int(uint8(code<> (nbits - rembits)) + dst[len(dst)-1] |= t + } + + return dst +} + +// HuffmanEncodeLength returns the number of bytes required to encode +// s in Huffman codes. The result is round up to byte boundary. +func HuffmanEncodeLength(s string) uint64 { + n := uint64(0) + for i := 0; i < len(s); i++ { + n += uint64(huffmanCodeLen[s[i]]) + } + return (n + 7) / 8 +} + +// appendByteToHuffmanCode appends Huffman code for c to dst and +// returns the extended buffer and the remaining bits in the last +// element. The appending is not byte aligned and the remaining bits +// in the last element of dst is given in rembits. +func appendByteToHuffmanCode(dst []byte, rembits uint8, c byte) ([]byte, uint8) { + code := huffmanCodes[c] + nbits := huffmanCodeLen[c] + + for { + if rembits > nbits { + t := uint8(code << (rembits - nbits)) + dst[len(dst)-1] |= t + rembits -= nbits + break + } + + t := uint8(code >> (nbits - rembits)) + dst[len(dst)-1] |= t + + nbits -= rembits + rembits = 8 + + if nbits == 0 { + break + } + + dst = append(dst, 0) + } + + return dst, rembits +} diff --git a/vendor/golang.org/x/net/http2/hpack/tables.go b/vendor/golang.org/x/net/http2/hpack/tables.go new file mode 100644 index 0000000..b9283a0 --- /dev/null +++ b/vendor/golang.org/x/net/http2/hpack/tables.go @@ -0,0 +1,352 @@ +// Copyright 2014 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package hpack + +func pair(name, value string) HeaderField { + return HeaderField{Name: name, Value: value} +} + +// http://tools.ietf.org/html/draft-ietf-httpbis-header-compression-07#appendix-B +var staticTable = [...]HeaderField{ + pair(":authority", ""), // index 1 (1-based) + pair(":method", "GET"), + pair(":method", "POST"), + pair(":path", "/"), + pair(":path", "/index.html"), + pair(":scheme", "http"), + pair(":scheme", "https"), + pair(":status", "200"), + pair(":status", "204"), + pair(":status", "206"), + pair(":status", "304"), + pair(":status", "400"), + pair(":status", "404"), + pair(":status", "500"), + pair("accept-charset", ""), + pair("accept-encoding", "gzip, deflate"), + pair("accept-language", ""), + pair("accept-ranges", ""), + pair("accept", ""), + pair("access-control-allow-origin", ""), + pair("age", ""), + pair("allow", ""), + pair("authorization", ""), + pair("cache-control", ""), + pair("content-disposition", ""), + pair("content-encoding", ""), + pair("content-language", ""), + pair("content-length", ""), + pair("content-location", ""), + pair("content-range", ""), + pair("content-type", ""), + pair("cookie", ""), + pair("date", ""), + pair("etag", ""), + pair("expect", ""), + pair("expires", ""), + pair("from", ""), + pair("host", ""), + pair("if-match", ""), + pair("if-modified-since", ""), + pair("if-none-match", ""), + pair("if-range", ""), + pair("if-unmodified-since", ""), + pair("last-modified", ""), + pair("link", ""), + pair("location", ""), + pair("max-forwards", ""), + pair("proxy-authenticate", ""), + pair("proxy-authorization", ""), + pair("range", ""), + pair("referer", ""), + pair("refresh", ""), + pair("retry-after", ""), + pair("server", ""), + pair("set-cookie", ""), + pair("strict-transport-security", ""), + pair("transfer-encoding", ""), + pair("user-agent", ""), + pair("vary", ""), + pair("via", ""), + pair("www-authenticate", ""), +} + +var huffmanCodes = [256]uint32{ + 0x1ff8, + 0x7fffd8, + 0xfffffe2, + 0xfffffe3, + 0xfffffe4, + 0xfffffe5, + 0xfffffe6, + 0xfffffe7, + 0xfffffe8, + 0xffffea, + 0x3ffffffc, + 0xfffffe9, + 0xfffffea, + 0x3ffffffd, + 0xfffffeb, + 0xfffffec, + 0xfffffed, + 0xfffffee, + 0xfffffef, + 0xffffff0, + 0xffffff1, + 0xffffff2, + 0x3ffffffe, + 0xffffff3, + 0xffffff4, + 0xffffff5, + 0xffffff6, + 0xffffff7, + 0xffffff8, + 0xffffff9, + 0xffffffa, + 0xffffffb, + 0x14, + 0x3f8, + 0x3f9, + 0xffa, + 0x1ff9, + 0x15, + 0xf8, + 0x7fa, + 0x3fa, + 0x3fb, + 0xf9, + 0x7fb, + 0xfa, + 0x16, + 0x17, + 0x18, + 0x0, + 0x1, + 0x2, + 0x19, + 0x1a, + 0x1b, + 0x1c, + 0x1d, + 0x1e, + 0x1f, + 0x5c, + 0xfb, + 0x7ffc, + 0x20, + 0xffb, + 0x3fc, + 0x1ffa, + 0x21, + 0x5d, + 0x5e, + 0x5f, + 0x60, + 0x61, + 0x62, + 0x63, + 0x64, + 0x65, + 0x66, + 0x67, + 0x68, + 0x69, + 0x6a, + 0x6b, + 0x6c, + 0x6d, + 0x6e, + 0x6f, + 0x70, + 0x71, + 0x72, + 0xfc, + 0x73, + 0xfd, + 0x1ffb, + 0x7fff0, + 0x1ffc, + 0x3ffc, + 0x22, + 0x7ffd, + 0x3, + 0x23, + 0x4, + 0x24, + 0x5, + 0x25, + 0x26, + 0x27, + 0x6, + 0x74, + 0x75, + 0x28, + 0x29, + 0x2a, + 0x7, + 0x2b, + 0x76, + 0x2c, + 0x8, + 0x9, + 0x2d, + 0x77, + 0x78, + 0x79, + 0x7a, + 0x7b, + 0x7ffe, + 0x7fc, + 0x3ffd, + 0x1ffd, + 0xffffffc, + 0xfffe6, + 0x3fffd2, + 0xfffe7, + 0xfffe8, + 0x3fffd3, + 0x3fffd4, + 0x3fffd5, + 0x7fffd9, + 0x3fffd6, + 0x7fffda, + 0x7fffdb, + 0x7fffdc, + 0x7fffdd, + 0x7fffde, + 0xffffeb, + 0x7fffdf, + 0xffffec, + 0xffffed, + 0x3fffd7, + 0x7fffe0, + 0xffffee, + 0x7fffe1, + 0x7fffe2, + 0x7fffe3, + 0x7fffe4, + 0x1fffdc, + 0x3fffd8, + 0x7fffe5, + 0x3fffd9, + 0x7fffe6, + 0x7fffe7, + 0xffffef, + 0x3fffda, + 0x1fffdd, + 0xfffe9, + 0x3fffdb, + 0x3fffdc, + 0x7fffe8, + 0x7fffe9, + 0x1fffde, + 0x7fffea, + 0x3fffdd, + 0x3fffde, + 0xfffff0, + 0x1fffdf, + 0x3fffdf, + 0x7fffeb, + 0x7fffec, + 0x1fffe0, + 0x1fffe1, + 0x3fffe0, + 0x1fffe2, + 0x7fffed, + 0x3fffe1, + 0x7fffee, + 0x7fffef, + 0xfffea, + 0x3fffe2, + 0x3fffe3, + 0x3fffe4, + 0x7ffff0, + 0x3fffe5, + 0x3fffe6, + 0x7ffff1, + 0x3ffffe0, + 0x3ffffe1, + 0xfffeb, + 0x7fff1, + 0x3fffe7, + 0x7ffff2, + 0x3fffe8, + 0x1ffffec, + 0x3ffffe2, + 0x3ffffe3, + 0x3ffffe4, + 0x7ffffde, + 0x7ffffdf, + 0x3ffffe5, + 0xfffff1, + 0x1ffffed, + 0x7fff2, + 0x1fffe3, + 0x3ffffe6, + 0x7ffffe0, + 0x7ffffe1, + 0x3ffffe7, + 0x7ffffe2, + 0xfffff2, + 0x1fffe4, + 0x1fffe5, + 0x3ffffe8, + 0x3ffffe9, + 0xffffffd, + 0x7ffffe3, + 0x7ffffe4, + 0x7ffffe5, + 0xfffec, + 0xfffff3, + 0xfffed, + 0x1fffe6, + 0x3fffe9, + 0x1fffe7, + 0x1fffe8, + 0x7ffff3, + 0x3fffea, + 0x3fffeb, + 0x1ffffee, + 0x1ffffef, + 0xfffff4, + 0xfffff5, + 0x3ffffea, + 0x7ffff4, + 0x3ffffeb, + 0x7ffffe6, + 0x3ffffec, + 0x3ffffed, + 0x7ffffe7, + 0x7ffffe8, + 0x7ffffe9, + 0x7ffffea, + 0x7ffffeb, + 0xffffffe, + 0x7ffffec, + 0x7ffffed, + 0x7ffffee, + 0x7ffffef, + 0x7fffff0, + 0x3ffffee, +} + +var huffmanCodeLen = [256]uint8{ + 13, 23, 28, 28, 28, 28, 28, 28, 28, 24, 30, 28, 28, 30, 28, 28, + 28, 28, 28, 28, 28, 28, 30, 28, 28, 28, 28, 28, 28, 28, 28, 28, + 6, 10, 10, 12, 13, 6, 8, 11, 10, 10, 8, 11, 8, 6, 6, 6, + 5, 5, 5, 6, 6, 6, 6, 6, 6, 6, 7, 8, 15, 6, 12, 10, + 13, 6, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, + 7, 7, 7, 7, 7, 7, 7, 7, 8, 7, 8, 13, 19, 13, 14, 6, + 15, 5, 6, 5, 6, 5, 6, 6, 6, 5, 7, 7, 6, 6, 6, 5, + 6, 7, 6, 5, 5, 6, 7, 7, 7, 7, 7, 15, 11, 14, 13, 28, + 20, 22, 20, 20, 22, 22, 22, 23, 22, 23, 23, 23, 23, 23, 24, 23, + 24, 24, 22, 23, 24, 23, 23, 23, 23, 21, 22, 23, 22, 23, 23, 24, + 22, 21, 20, 22, 22, 23, 23, 21, 23, 22, 22, 24, 21, 22, 23, 23, + 21, 21, 22, 21, 23, 22, 23, 23, 20, 22, 22, 22, 23, 22, 22, 23, + 26, 26, 20, 19, 22, 23, 22, 25, 26, 26, 26, 27, 27, 26, 24, 25, + 19, 21, 26, 27, 27, 26, 27, 24, 21, 21, 26, 26, 28, 27, 27, 27, + 20, 24, 20, 21, 22, 21, 21, 23, 22, 22, 25, 25, 24, 24, 26, 23, + 26, 27, 26, 26, 27, 27, 27, 27, 27, 28, 27, 27, 27, 27, 27, 26, +} diff --git a/vendor/golang.org/x/net/http2/http2.go b/vendor/golang.org/x/net/http2/http2.go new file mode 100644 index 0000000..b6b0f9a --- /dev/null +++ b/vendor/golang.org/x/net/http2/http2.go @@ -0,0 +1,387 @@ +// Copyright 2014 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +// Package http2 implements the HTTP/2 protocol. +// +// This package is low-level and intended to be used directly by very +// few people. Most users will use it indirectly through the automatic +// use by the net/http package (from Go 1.6 and later). +// For use in earlier Go versions see ConfigureServer. (Transport support +// requires Go 1.6 or later) +// +// See https://http2.github.io/ for more information on HTTP/2. +// +// See https://http2.golang.org/ for a test server running this code. +// +package http2 // import "golang.org/x/net/http2" + +import ( + "bufio" + "crypto/tls" + "errors" + "fmt" + "io" + "net/http" + "os" + "sort" + "strconv" + "strings" + "sync" + + "golang.org/x/net/lex/httplex" +) + +var ( + VerboseLogs bool + logFrameWrites bool + logFrameReads bool + inTests bool +) + +func init() { + e := os.Getenv("GODEBUG") + if strings.Contains(e, "http2debug=1") { + VerboseLogs = true + } + if strings.Contains(e, "http2debug=2") { + VerboseLogs = true + logFrameWrites = true + logFrameReads = true + } +} + +const ( + // ClientPreface is the string that must be sent by new + // connections from clients. + ClientPreface = "PRI * HTTP/2.0\r\n\r\nSM\r\n\r\n" + + // SETTINGS_MAX_FRAME_SIZE default + // http://http2.github.io/http2-spec/#rfc.section.6.5.2 + initialMaxFrameSize = 16384 + + // NextProtoTLS is the NPN/ALPN protocol negotiated during + // HTTP/2's TLS setup. + NextProtoTLS = "h2" + + // http://http2.github.io/http2-spec/#SettingValues + initialHeaderTableSize = 4096 + + initialWindowSize = 65535 // 6.9.2 Initial Flow Control Window Size + + defaultMaxReadFrameSize = 1 << 20 +) + +var ( + clientPreface = []byte(ClientPreface) +) + +type streamState int + +// HTTP/2 stream states. +// +// See http://tools.ietf.org/html/rfc7540#section-5.1. +// +// For simplicity, the server code merges "reserved (local)" into +// "half-closed (remote)". This is one less state transition to track. +// The only downside is that we send PUSH_PROMISEs slightly less +// liberally than allowable. More discussion here: +// https://lists.w3.org/Archives/Public/ietf-http-wg/2016JulSep/0599.html +// +// "reserved (remote)" is omitted since the client code does not +// support server push. +const ( + stateIdle streamState = iota + stateOpen + stateHalfClosedLocal + stateHalfClosedRemote + stateClosed +) + +var stateName = [...]string{ + stateIdle: "Idle", + stateOpen: "Open", + stateHalfClosedLocal: "HalfClosedLocal", + stateHalfClosedRemote: "HalfClosedRemote", + stateClosed: "Closed", +} + +func (st streamState) String() string { + return stateName[st] +} + +// Setting is a setting parameter: which setting it is, and its value. +type Setting struct { + // ID is which setting is being set. + // See http://http2.github.io/http2-spec/#SettingValues + ID SettingID + + // Val is the value. + Val uint32 +} + +func (s Setting) String() string { + return fmt.Sprintf("[%v = %d]", s.ID, s.Val) +} + +// Valid reports whether the setting is valid. +func (s Setting) Valid() error { + // Limits and error codes from 6.5.2 Defined SETTINGS Parameters + switch s.ID { + case SettingEnablePush: + if s.Val != 1 && s.Val != 0 { + return ConnectionError(ErrCodeProtocol) + } + case SettingInitialWindowSize: + if s.Val > 1<<31-1 { + return ConnectionError(ErrCodeFlowControl) + } + case SettingMaxFrameSize: + if s.Val < 16384 || s.Val > 1<<24-1 { + return ConnectionError(ErrCodeProtocol) + } + } + return nil +} + +// A SettingID is an HTTP/2 setting as defined in +// http://http2.github.io/http2-spec/#iana-settings +type SettingID uint16 + +const ( + SettingHeaderTableSize SettingID = 0x1 + SettingEnablePush SettingID = 0x2 + SettingMaxConcurrentStreams SettingID = 0x3 + SettingInitialWindowSize SettingID = 0x4 + SettingMaxFrameSize SettingID = 0x5 + SettingMaxHeaderListSize SettingID = 0x6 +) + +var settingName = map[SettingID]string{ + SettingHeaderTableSize: "HEADER_TABLE_SIZE", + SettingEnablePush: "ENABLE_PUSH", + SettingMaxConcurrentStreams: "MAX_CONCURRENT_STREAMS", + SettingInitialWindowSize: "INITIAL_WINDOW_SIZE", + SettingMaxFrameSize: "MAX_FRAME_SIZE", + SettingMaxHeaderListSize: "MAX_HEADER_LIST_SIZE", +} + +func (s SettingID) String() string { + if v, ok := settingName[s]; ok { + return v + } + return fmt.Sprintf("UNKNOWN_SETTING_%d", uint16(s)) +} + +var ( + errInvalidHeaderFieldName = errors.New("http2: invalid header field name") + errInvalidHeaderFieldValue = errors.New("http2: invalid header field value") +) + +// validWireHeaderFieldName reports whether v is a valid header field +// name (key). See httplex.ValidHeaderName for the base rules. +// +// Further, http2 says: +// "Just as in HTTP/1.x, header field names are strings of ASCII +// characters that are compared in a case-insensitive +// fashion. However, header field names MUST be converted to +// lowercase prior to their encoding in HTTP/2. " +func validWireHeaderFieldName(v string) bool { + if len(v) == 0 { + return false + } + for _, r := range v { + if !httplex.IsTokenRune(r) { + return false + } + if 'A' <= r && r <= 'Z' { + return false + } + } + return true +} + +var httpCodeStringCommon = map[int]string{} // n -> strconv.Itoa(n) + +func init() { + for i := 100; i <= 999; i++ { + if v := http.StatusText(i); v != "" { + httpCodeStringCommon[i] = strconv.Itoa(i) + } + } +} + +func httpCodeString(code int) string { + if s, ok := httpCodeStringCommon[code]; ok { + return s + } + return strconv.Itoa(code) +} + +// from pkg io +type stringWriter interface { + WriteString(s string) (n int, err error) +} + +// A gate lets two goroutines coordinate their activities. +type gate chan struct{} + +func (g gate) Done() { g <- struct{}{} } +func (g gate) Wait() { <-g } + +// A closeWaiter is like a sync.WaitGroup but only goes 1 to 0 (open to closed). +type closeWaiter chan struct{} + +// Init makes a closeWaiter usable. +// It exists because so a closeWaiter value can be placed inside a +// larger struct and have the Mutex and Cond's memory in the same +// allocation. +func (cw *closeWaiter) Init() { + *cw = make(chan struct{}) +} + +// Close marks the closeWaiter as closed and unblocks any waiters. +func (cw closeWaiter) Close() { + close(cw) +} + +// Wait waits for the closeWaiter to become closed. +func (cw closeWaiter) Wait() { + <-cw +} + +// bufferedWriter is a buffered writer that writes to w. +// Its buffered writer is lazily allocated as needed, to minimize +// idle memory usage with many connections. +type bufferedWriter struct { + w io.Writer // immutable + bw *bufio.Writer // non-nil when data is buffered +} + +func newBufferedWriter(w io.Writer) *bufferedWriter { + return &bufferedWriter{w: w} +} + +// bufWriterPoolBufferSize is the size of bufio.Writer's +// buffers created using bufWriterPool. +// +// TODO: pick a less arbitrary value? this is a bit under +// (3 x typical 1500 byte MTU) at least. Other than that, +// not much thought went into it. +const bufWriterPoolBufferSize = 4 << 10 + +var bufWriterPool = sync.Pool{ + New: func() interface{} { + return bufio.NewWriterSize(nil, bufWriterPoolBufferSize) + }, +} + +func (w *bufferedWriter) Available() int { + if w.bw == nil { + return bufWriterPoolBufferSize + } + return w.bw.Available() +} + +func (w *bufferedWriter) Write(p []byte) (n int, err error) { + if w.bw == nil { + bw := bufWriterPool.Get().(*bufio.Writer) + bw.Reset(w.w) + w.bw = bw + } + return w.bw.Write(p) +} + +func (w *bufferedWriter) Flush() error { + bw := w.bw + if bw == nil { + return nil + } + err := bw.Flush() + bw.Reset(nil) + bufWriterPool.Put(bw) + w.bw = nil + return err +} + +func mustUint31(v int32) uint32 { + if v < 0 || v > 2147483647 { + panic("out of range") + } + return uint32(v) +} + +// bodyAllowedForStatus reports whether a given response status code +// permits a body. See RFC 2616, section 4.4. +func bodyAllowedForStatus(status int) bool { + switch { + case status >= 100 && status <= 199: + return false + case status == 204: + return false + case status == 304: + return false + } + return true +} + +type httpError struct { + msg string + timeout bool +} + +func (e *httpError) Error() string { return e.msg } +func (e *httpError) Timeout() bool { return e.timeout } +func (e *httpError) Temporary() bool { return true } + +var errTimeout error = &httpError{msg: "http2: timeout awaiting response headers", timeout: true} + +type connectionStater interface { + ConnectionState() tls.ConnectionState +} + +var sorterPool = sync.Pool{New: func() interface{} { return new(sorter) }} + +type sorter struct { + v []string // owned by sorter +} + +func (s *sorter) Len() int { return len(s.v) } +func (s *sorter) Swap(i, j int) { s.v[i], s.v[j] = s.v[j], s.v[i] } +func (s *sorter) Less(i, j int) bool { return s.v[i] < s.v[j] } + +// Keys returns the sorted keys of h. +// +// The returned slice is only valid until s used again or returned to +// its pool. +func (s *sorter) Keys(h http.Header) []string { + keys := s.v[:0] + for k := range h { + keys = append(keys, k) + } + s.v = keys + sort.Sort(s) + return keys +} + +func (s *sorter) SortStrings(ss []string) { + // Our sorter works on s.v, which sorter owns, so + // stash it away while we sort the user's buffer. + save := s.v + s.v = ss + sort.Sort(s) + s.v = save +} + +// validPseudoPath reports whether v is a valid :path pseudo-header +// value. It must be either: +// +// *) a non-empty string starting with '/', but not with with "//", +// *) the string '*', for OPTIONS requests. +// +// For now this is only used a quick check for deciding when to clean +// up Opaque URLs before sending requests from the Transport. +// See golang.org/issue/16847 +func validPseudoPath(v string) bool { + return (len(v) > 0 && v[0] == '/' && (len(v) == 1 || v[1] != '/')) || v == "*" +} diff --git a/vendor/golang.org/x/net/http2/not_go16.go b/vendor/golang.org/x/net/http2/not_go16.go new file mode 100644 index 0000000..efd2e12 --- /dev/null +++ b/vendor/golang.org/x/net/http2/not_go16.go @@ -0,0 +1,46 @@ +// Copyright 2015 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +// +build !go1.6 + +package http2 + +import ( + "crypto/tls" + "net/http" + "time" +) + +func configureTransport(t1 *http.Transport) (*Transport, error) { + return nil, errTransportVersion +} + +func transportExpectContinueTimeout(t1 *http.Transport) time.Duration { + return 0 + +} + +// isBadCipher reports whether the cipher is blacklisted by the HTTP/2 spec. +func isBadCipher(cipher uint16) bool { + switch cipher { + case tls.TLS_RSA_WITH_RC4_128_SHA, + tls.TLS_RSA_WITH_3DES_EDE_CBC_SHA, + tls.TLS_RSA_WITH_AES_128_CBC_SHA, + tls.TLS_RSA_WITH_AES_256_CBC_SHA, + tls.TLS_ECDHE_ECDSA_WITH_RC4_128_SHA, + tls.TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA, + tls.TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA, + tls.TLS_ECDHE_RSA_WITH_RC4_128_SHA, + tls.TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA, + tls.TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA, + tls.TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA: + // Reject cipher suites from Appendix A. + // "This list includes those cipher suites that do not + // offer an ephemeral key exchange and those that are + // based on the TLS null, stream or block cipher type" + return true + default: + return false + } +} diff --git a/vendor/golang.org/x/net/http2/not_go17.go b/vendor/golang.org/x/net/http2/not_go17.go new file mode 100644 index 0000000..140434a --- /dev/null +++ b/vendor/golang.org/x/net/http2/not_go17.go @@ -0,0 +1,87 @@ +// Copyright 2016 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +// +build !go1.7 + +package http2 + +import ( + "crypto/tls" + "net" + "net/http" + "time" +) + +type contextContext interface { + Done() <-chan struct{} + Err() error +} + +type fakeContext struct{} + +func (fakeContext) Done() <-chan struct{} { return nil } +func (fakeContext) Err() error { panic("should not be called") } + +func reqContext(r *http.Request) fakeContext { + return fakeContext{} +} + +func setResponseUncompressed(res *http.Response) { + // Nothing. +} + +type clientTrace struct{} + +func requestTrace(*http.Request) *clientTrace { return nil } +func traceGotConn(*http.Request, *ClientConn) {} +func traceFirstResponseByte(*clientTrace) {} +func traceWroteHeaders(*clientTrace) {} +func traceWroteRequest(*clientTrace, error) {} +func traceGot100Continue(trace *clientTrace) {} +func traceWait100Continue(trace *clientTrace) {} + +func nop() {} + +func serverConnBaseContext(c net.Conn, opts *ServeConnOpts) (ctx contextContext, cancel func()) { + return nil, nop +} + +func contextWithCancel(ctx contextContext) (_ contextContext, cancel func()) { + return ctx, nop +} + +func requestWithContext(req *http.Request, ctx contextContext) *http.Request { + return req +} + +// temporary copy of Go 1.6's private tls.Config.clone: +func cloneTLSConfig(c *tls.Config) *tls.Config { + return &tls.Config{ + Rand: c.Rand, + Time: c.Time, + Certificates: c.Certificates, + NameToCertificate: c.NameToCertificate, + GetCertificate: c.GetCertificate, + RootCAs: c.RootCAs, + NextProtos: c.NextProtos, + ServerName: c.ServerName, + ClientAuth: c.ClientAuth, + ClientCAs: c.ClientCAs, + InsecureSkipVerify: c.InsecureSkipVerify, + CipherSuites: c.CipherSuites, + PreferServerCipherSuites: c.PreferServerCipherSuites, + SessionTicketsDisabled: c.SessionTicketsDisabled, + SessionTicketKey: c.SessionTicketKey, + ClientSessionCache: c.ClientSessionCache, + MinVersion: c.MinVersion, + MaxVersion: c.MaxVersion, + CurvePreferences: c.CurvePreferences, + } +} + +func (cc *ClientConn) Ping(ctx contextContext) error { + return cc.ping(ctx) +} + +func (t *Transport) idleConnTimeout() time.Duration { return 0 } diff --git a/vendor/golang.org/x/net/http2/not_go18.go b/vendor/golang.org/x/net/http2/not_go18.go new file mode 100644 index 0000000..efbf83c --- /dev/null +++ b/vendor/golang.org/x/net/http2/not_go18.go @@ -0,0 +1,27 @@ +// Copyright 2016 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +// +build !go1.8 + +package http2 + +import ( + "io" + "net/http" +) + +func configureServer18(h1 *http.Server, h2 *Server) error { + // No IdleTimeout to sync prior to Go 1.8. + return nil +} + +func shouldLogPanic(panicValue interface{}) bool { + return panicValue != nil +} + +func reqGetBody(req *http.Request) func() (io.ReadCloser, error) { + return nil +} + +func reqBodyIsNoBody(io.ReadCloser) bool { return false } diff --git a/vendor/golang.org/x/net/http2/pipe.go b/vendor/golang.org/x/net/http2/pipe.go new file mode 100644 index 0000000..53b7a1d --- /dev/null +++ b/vendor/golang.org/x/net/http2/pipe.go @@ -0,0 +1,153 @@ +// Copyright 2014 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package http2 + +import ( + "errors" + "io" + "sync" +) + +// pipe is a goroutine-safe io.Reader/io.Writer pair. It's like +// io.Pipe except there are no PipeReader/PipeWriter halves, and the +// underlying buffer is an interface. (io.Pipe is always unbuffered) +type pipe struct { + mu sync.Mutex + c sync.Cond // c.L lazily initialized to &p.mu + b pipeBuffer + err error // read error once empty. non-nil means closed. + breakErr error // immediate read error (caller doesn't see rest of b) + donec chan struct{} // closed on error + readFn func() // optional code to run in Read before error +} + +type pipeBuffer interface { + Len() int + io.Writer + io.Reader +} + +func (p *pipe) Len() int { + p.mu.Lock() + defer p.mu.Unlock() + return p.b.Len() +} + +// Read waits until data is available and copies bytes +// from the buffer into p. +func (p *pipe) Read(d []byte) (n int, err error) { + p.mu.Lock() + defer p.mu.Unlock() + if p.c.L == nil { + p.c.L = &p.mu + } + for { + if p.breakErr != nil { + return 0, p.breakErr + } + if p.b.Len() > 0 { + return p.b.Read(d) + } + if p.err != nil { + if p.readFn != nil { + p.readFn() // e.g. copy trailers + p.readFn = nil // not sticky like p.err + } + return 0, p.err + } + p.c.Wait() + } +} + +var errClosedPipeWrite = errors.New("write on closed buffer") + +// Write copies bytes from p into the buffer and wakes a reader. +// It is an error to write more data than the buffer can hold. +func (p *pipe) Write(d []byte) (n int, err error) { + p.mu.Lock() + defer p.mu.Unlock() + if p.c.L == nil { + p.c.L = &p.mu + } + defer p.c.Signal() + if p.err != nil { + return 0, errClosedPipeWrite + } + return p.b.Write(d) +} + +// CloseWithError causes the next Read (waking up a current blocked +// Read if needed) to return the provided err after all data has been +// read. +// +// The error must be non-nil. +func (p *pipe) CloseWithError(err error) { p.closeWithError(&p.err, err, nil) } + +// BreakWithError causes the next Read (waking up a current blocked +// Read if needed) to return the provided err immediately, without +// waiting for unread data. +func (p *pipe) BreakWithError(err error) { p.closeWithError(&p.breakErr, err, nil) } + +// closeWithErrorAndCode is like CloseWithError but also sets some code to run +// in the caller's goroutine before returning the error. +func (p *pipe) closeWithErrorAndCode(err error, fn func()) { p.closeWithError(&p.err, err, fn) } + +func (p *pipe) closeWithError(dst *error, err error, fn func()) { + if err == nil { + panic("err must be non-nil") + } + p.mu.Lock() + defer p.mu.Unlock() + if p.c.L == nil { + p.c.L = &p.mu + } + defer p.c.Signal() + if *dst != nil { + // Already been done. + return + } + p.readFn = fn + *dst = err + p.closeDoneLocked() +} + +// requires p.mu be held. +func (p *pipe) closeDoneLocked() { + if p.donec == nil { + return + } + // Close if unclosed. This isn't racy since we always + // hold p.mu while closing. + select { + case <-p.donec: + default: + close(p.donec) + } +} + +// Err returns the error (if any) first set by BreakWithError or CloseWithError. +func (p *pipe) Err() error { + p.mu.Lock() + defer p.mu.Unlock() + if p.breakErr != nil { + return p.breakErr + } + return p.err +} + +// Done returns a channel which is closed if and when this pipe is closed +// with CloseWithError. +func (p *pipe) Done() <-chan struct{} { + p.mu.Lock() + defer p.mu.Unlock() + if p.donec == nil { + p.donec = make(chan struct{}) + if p.err != nil || p.breakErr != nil { + // Already hit an error. + p.closeDoneLocked() + } + } + return p.donec +} diff --git a/vendor/golang.org/x/net/http2/server.go b/vendor/golang.org/x/net/http2/server.go new file mode 100644 index 0000000..3c6b90c --- /dev/null +++ b/vendor/golang.org/x/net/http2/server.go @@ -0,0 +1,2753 @@ +// Copyright 2014 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +// TODO: turn off the serve goroutine when idle, so +// an idle conn only has the readFrames goroutine active. (which could +// also be optimized probably to pin less memory in crypto/tls). This +// would involve tracking when the serve goroutine is active (atomic +// int32 read/CAS probably?) and starting it up when frames arrive, +// and shutting it down when all handlers exit. the occasional PING +// packets could use time.AfterFunc to call sc.wakeStartServeLoop() +// (which is a no-op if already running) and then queue the PING write +// as normal. The serve loop would then exit in most cases (if no +// Handlers running) and not be woken up again until the PING packet +// returns. + +// TODO (maybe): add a mechanism for Handlers to going into +// half-closed-local mode (rw.(io.Closer) test?) but not exit their +// handler, and continue to be able to read from the +// Request.Body. This would be a somewhat semantic change from HTTP/1 +// (or at least what we expose in net/http), so I'd probably want to +// add it there too. For now, this package says that returning from +// the Handler ServeHTTP function means you're both done reading and +// done writing, without a way to stop just one or the other. + +package http2 + +import ( + "bufio" + "bytes" + "crypto/tls" + "errors" + "fmt" + "io" + "log" + "math" + "net" + "net/http" + "net/textproto" + "net/url" + "os" + "reflect" + "runtime" + "strconv" + "strings" + "sync" + "time" + + "golang.org/x/net/http2/hpack" +) + +const ( + prefaceTimeout = 10 * time.Second + firstSettingsTimeout = 2 * time.Second // should be in-flight with preface anyway + handlerChunkWriteSize = 4 << 10 + defaultMaxStreams = 250 // TODO: make this 100 as the GFE seems to? +) + +var ( + errClientDisconnected = errors.New("client disconnected") + errClosedBody = errors.New("body closed by handler") + errHandlerComplete = errors.New("http2: request body closed due to handler exiting") + errStreamClosed = errors.New("http2: stream closed") +) + +var responseWriterStatePool = sync.Pool{ + New: func() interface{} { + rws := &responseWriterState{} + rws.bw = bufio.NewWriterSize(chunkWriter{rws}, handlerChunkWriteSize) + return rws + }, +} + +// Test hooks. +var ( + testHookOnConn func() + testHookGetServerConn func(*serverConn) + testHookOnPanicMu *sync.Mutex // nil except in tests + testHookOnPanic func(sc *serverConn, panicVal interface{}) (rePanic bool) +) + +// Server is an HTTP/2 server. +type Server struct { + // MaxHandlers limits the number of http.Handler ServeHTTP goroutines + // which may run at a time over all connections. + // Negative or zero no limit. + // TODO: implement + MaxHandlers int + + // MaxConcurrentStreams optionally specifies the number of + // concurrent streams that each client may have open at a + // time. This is unrelated to the number of http.Handler goroutines + // which may be active globally, which is MaxHandlers. + // If zero, MaxConcurrentStreams defaults to at least 100, per + // the HTTP/2 spec's recommendations. + MaxConcurrentStreams uint32 + + // MaxReadFrameSize optionally specifies the largest frame + // this server is willing to read. A valid value is between + // 16k and 16M, inclusive. If zero or otherwise invalid, a + // default value is used. + MaxReadFrameSize uint32 + + // PermitProhibitedCipherSuites, if true, permits the use of + // cipher suites prohibited by the HTTP/2 spec. + PermitProhibitedCipherSuites bool + + // IdleTimeout specifies how long until idle clients should be + // closed with a GOAWAY frame. PING frames are not considered + // activity for the purposes of IdleTimeout. + IdleTimeout time.Duration + + // NewWriteScheduler constructs a write scheduler for a connection. + // If nil, a default scheduler is chosen. + NewWriteScheduler func() WriteScheduler +} + +func (s *Server) maxReadFrameSize() uint32 { + if v := s.MaxReadFrameSize; v >= minMaxFrameSize && v <= maxFrameSize { + return v + } + return defaultMaxReadFrameSize +} + +func (s *Server) maxConcurrentStreams() uint32 { + if v := s.MaxConcurrentStreams; v > 0 { + return v + } + return defaultMaxStreams +} + +// ConfigureServer adds HTTP/2 support to a net/http Server. +// +// The configuration conf may be nil. +// +// ConfigureServer must be called before s begins serving. +func ConfigureServer(s *http.Server, conf *Server) error { + if s == nil { + panic("nil *http.Server") + } + if conf == nil { + conf = new(Server) + } + if err := configureServer18(s, conf); err != nil { + return err + } + + if s.TLSConfig == nil { + s.TLSConfig = new(tls.Config) + } else if s.TLSConfig.CipherSuites != nil { + // If they already provided a CipherSuite list, return + // an error if it has a bad order or is missing + // ECDHE_RSA_WITH_AES_128_GCM_SHA256. + const requiredCipher = tls.TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256 + haveRequired := false + sawBad := false + for i, cs := range s.TLSConfig.CipherSuites { + if cs == requiredCipher { + haveRequired = true + } + if isBadCipher(cs) { + sawBad = true + } else if sawBad { + return fmt.Errorf("http2: TLSConfig.CipherSuites index %d contains an HTTP/2-approved cipher suite (%#04x), but it comes after unapproved cipher suites. With this configuration, clients that don't support previous, approved cipher suites may be given an unapproved one and reject the connection.", i, cs) + } + } + if !haveRequired { + return fmt.Errorf("http2: TLSConfig.CipherSuites is missing HTTP/2-required TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256") + } + } + + // Note: not setting MinVersion to tls.VersionTLS12, + // as we don't want to interfere with HTTP/1.1 traffic + // on the user's server. We enforce TLS 1.2 later once + // we accept a connection. Ideally this should be done + // during next-proto selection, but using TLS <1.2 with + // HTTP/2 is still the client's bug. + + s.TLSConfig.PreferServerCipherSuites = true + + haveNPN := false + for _, p := range s.TLSConfig.NextProtos { + if p == NextProtoTLS { + haveNPN = true + break + } + } + if !haveNPN { + s.TLSConfig.NextProtos = append(s.TLSConfig.NextProtos, NextProtoTLS) + } + + if s.TLSNextProto == nil { + s.TLSNextProto = map[string]func(*http.Server, *tls.Conn, http.Handler){} + } + protoHandler := func(hs *http.Server, c *tls.Conn, h http.Handler) { + if testHookOnConn != nil { + testHookOnConn() + } + conf.ServeConn(c, &ServeConnOpts{ + Handler: h, + BaseConfig: hs, + }) + } + s.TLSNextProto[NextProtoTLS] = protoHandler + return nil +} + +// ServeConnOpts are options for the Server.ServeConn method. +type ServeConnOpts struct { + // BaseConfig optionally sets the base configuration + // for values. If nil, defaults are used. + BaseConfig *http.Server + + // Handler specifies which handler to use for processing + // requests. If nil, BaseConfig.Handler is used. If BaseConfig + // or BaseConfig.Handler is nil, http.DefaultServeMux is used. + Handler http.Handler +} + +func (o *ServeConnOpts) baseConfig() *http.Server { + if o != nil && o.BaseConfig != nil { + return o.BaseConfig + } + return new(http.Server) +} + +func (o *ServeConnOpts) handler() http.Handler { + if o != nil { + if o.Handler != nil { + return o.Handler + } + if o.BaseConfig != nil && o.BaseConfig.Handler != nil { + return o.BaseConfig.Handler + } + } + return http.DefaultServeMux +} + +// ServeConn serves HTTP/2 requests on the provided connection and +// blocks until the connection is no longer readable. +// +// ServeConn starts speaking HTTP/2 assuming that c has not had any +// reads or writes. It writes its initial settings frame and expects +// to be able to read the preface and settings frame from the +// client. If c has a ConnectionState method like a *tls.Conn, the +// ConnectionState is used to verify the TLS ciphersuite and to set +// the Request.TLS field in Handlers. +// +// ServeConn does not support h2c by itself. Any h2c support must be +// implemented in terms of providing a suitably-behaving net.Conn. +// +// The opts parameter is optional. If nil, default values are used. +func (s *Server) ServeConn(c net.Conn, opts *ServeConnOpts) { + baseCtx, cancel := serverConnBaseContext(c, opts) + defer cancel() + + sc := &serverConn{ + srv: s, + hs: opts.baseConfig(), + conn: c, + baseCtx: baseCtx, + remoteAddrStr: c.RemoteAddr().String(), + bw: newBufferedWriter(c), + handler: opts.handler(), + streams: make(map[uint32]*stream), + readFrameCh: make(chan readFrameResult), + wantWriteFrameCh: make(chan FrameWriteRequest, 8), + wantStartPushCh: make(chan startPushRequest, 8), + wroteFrameCh: make(chan frameWriteResult, 1), // buffered; one send in writeFrameAsync + bodyReadCh: make(chan bodyReadMsg), // buffering doesn't matter either way + doneServing: make(chan struct{}), + clientMaxStreams: math.MaxUint32, // Section 6.5.2: "Initially, there is no limit to this value" + advMaxStreams: s.maxConcurrentStreams(), + initialWindowSize: initialWindowSize, + maxFrameSize: initialMaxFrameSize, + headerTableSize: initialHeaderTableSize, + serveG: newGoroutineLock(), + pushEnabled: true, + } + + // The net/http package sets the write deadline from the + // http.Server.WriteTimeout during the TLS handshake, but then + // passes the connection off to us with the deadline already + // set. Disarm it here so that it is not applied to additional + // streams opened on this connection. + // TODO: implement WriteTimeout fully. See Issue 18437. + if sc.hs.WriteTimeout != 0 { + sc.conn.SetWriteDeadline(time.Time{}) + } + + if s.NewWriteScheduler != nil { + sc.writeSched = s.NewWriteScheduler() + } else { + sc.writeSched = NewRandomWriteScheduler() + } + + sc.flow.add(initialWindowSize) + sc.inflow.add(initialWindowSize) + sc.hpackEncoder = hpack.NewEncoder(&sc.headerWriteBuf) + + fr := NewFramer(sc.bw, c) + fr.ReadMetaHeaders = hpack.NewDecoder(initialHeaderTableSize, nil) + fr.MaxHeaderListSize = sc.maxHeaderListSize() + fr.SetMaxReadFrameSize(s.maxReadFrameSize()) + sc.framer = fr + + if tc, ok := c.(connectionStater); ok { + sc.tlsState = new(tls.ConnectionState) + *sc.tlsState = tc.ConnectionState() + // 9.2 Use of TLS Features + // An implementation of HTTP/2 over TLS MUST use TLS + // 1.2 or higher with the restrictions on feature set + // and cipher suite described in this section. Due to + // implementation limitations, it might not be + // possible to fail TLS negotiation. An endpoint MUST + // immediately terminate an HTTP/2 connection that + // does not meet the TLS requirements described in + // this section with a connection error (Section + // 5.4.1) of type INADEQUATE_SECURITY. + if sc.tlsState.Version < tls.VersionTLS12 { + sc.rejectConn(ErrCodeInadequateSecurity, "TLS version too low") + return + } + + if sc.tlsState.ServerName == "" { + // Client must use SNI, but we don't enforce that anymore, + // since it was causing problems when connecting to bare IP + // addresses during development. + // + // TODO: optionally enforce? Or enforce at the time we receive + // a new request, and verify the the ServerName matches the :authority? + // But that precludes proxy situations, perhaps. + // + // So for now, do nothing here again. + } + + if !s.PermitProhibitedCipherSuites && isBadCipher(sc.tlsState.CipherSuite) { + // "Endpoints MAY choose to generate a connection error + // (Section 5.4.1) of type INADEQUATE_SECURITY if one of + // the prohibited cipher suites are negotiated." + // + // We choose that. In my opinion, the spec is weak + // here. It also says both parties must support at least + // TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256 so there's no + // excuses here. If we really must, we could allow an + // "AllowInsecureWeakCiphers" option on the server later. + // Let's see how it plays out first. + sc.rejectConn(ErrCodeInadequateSecurity, fmt.Sprintf("Prohibited TLS 1.2 Cipher Suite: %x", sc.tlsState.CipherSuite)) + return + } + } + + if hook := testHookGetServerConn; hook != nil { + hook(sc) + } + sc.serve() +} + +func (sc *serverConn) rejectConn(err ErrCode, debug string) { + sc.vlogf("http2: server rejecting conn: %v, %s", err, debug) + // ignoring errors. hanging up anyway. + sc.framer.WriteGoAway(0, err, []byte(debug)) + sc.bw.Flush() + sc.conn.Close() +} + +type serverConn struct { + // Immutable: + srv *Server + hs *http.Server + conn net.Conn + bw *bufferedWriter // writing to conn + handler http.Handler + baseCtx contextContext + framer *Framer + doneServing chan struct{} // closed when serverConn.serve ends + readFrameCh chan readFrameResult // written by serverConn.readFrames + wantWriteFrameCh chan FrameWriteRequest // from handlers -> serve + wantStartPushCh chan startPushRequest // from handlers -> serve + wroteFrameCh chan frameWriteResult // from writeFrameAsync -> serve, tickles more frame writes + bodyReadCh chan bodyReadMsg // from handlers -> serve + testHookCh chan func(int) // code to run on the serve loop + flow flow // conn-wide (not stream-specific) outbound flow control + inflow flow // conn-wide inbound flow control + tlsState *tls.ConnectionState // shared by all handlers, like net/http + remoteAddrStr string + writeSched WriteScheduler + + // Everything following is owned by the serve loop; use serveG.check(): + serveG goroutineLock // used to verify funcs are on serve() + pushEnabled bool + sawFirstSettings bool // got the initial SETTINGS frame after the preface + needToSendSettingsAck bool + unackedSettings int // how many SETTINGS have we sent without ACKs? + clientMaxStreams uint32 // SETTINGS_MAX_CONCURRENT_STREAMS from client (our PUSH_PROMISE limit) + advMaxStreams uint32 // our SETTINGS_MAX_CONCURRENT_STREAMS advertised the client + curClientStreams uint32 // number of open streams initiated by the client + curPushedStreams uint32 // number of open streams initiated by server push + maxClientStreamID uint32 // max ever seen from client (odd), or 0 if there have been no client requests + maxPushPromiseID uint32 // ID of the last push promise (even), or 0 if there have been no pushes + streams map[uint32]*stream + initialWindowSize int32 + maxFrameSize int32 + headerTableSize uint32 + peerMaxHeaderListSize uint32 // zero means unknown (default) + canonHeader map[string]string // http2-lower-case -> Go-Canonical-Case + writingFrame bool // started writing a frame (on serve goroutine or separate) + writingFrameAsync bool // started a frame on its own goroutine but haven't heard back on wroteFrameCh + needsFrameFlush bool // last frame write wasn't a flush + inGoAway bool // we've started to or sent GOAWAY + inFrameScheduleLoop bool // whether we're in the scheduleFrameWrite loop + needToSendGoAway bool // we need to schedule a GOAWAY frame write + goAwayCode ErrCode + shutdownTimerCh <-chan time.Time // nil until used + shutdownTimer *time.Timer // nil until used + idleTimer *time.Timer // nil if unused + idleTimerCh <-chan time.Time // nil if unused + + // Owned by the writeFrameAsync goroutine: + headerWriteBuf bytes.Buffer + hpackEncoder *hpack.Encoder +} + +func (sc *serverConn) maxHeaderListSize() uint32 { + n := sc.hs.MaxHeaderBytes + if n <= 0 { + n = http.DefaultMaxHeaderBytes + } + // http2's count is in a slightly different unit and includes 32 bytes per pair. + // So, take the net/http.Server value and pad it up a bit, assuming 10 headers. + const perFieldOverhead = 32 // per http2 spec + const typicalHeaders = 10 // conservative + return uint32(n + typicalHeaders*perFieldOverhead) +} + +func (sc *serverConn) curOpenStreams() uint32 { + sc.serveG.check() + return sc.curClientStreams + sc.curPushedStreams +} + +// stream represents a stream. This is the minimal metadata needed by +// the serve goroutine. Most of the actual stream state is owned by +// the http.Handler's goroutine in the responseWriter. Because the +// responseWriter's responseWriterState is recycled at the end of a +// handler, this struct intentionally has no pointer to the +// *responseWriter{,State} itself, as the Handler ending nils out the +// responseWriter's state field. +type stream struct { + // immutable: + sc *serverConn + id uint32 + body *pipe // non-nil if expecting DATA frames + cw closeWaiter // closed wait stream transitions to closed state + ctx contextContext + cancelCtx func() + + // owned by serverConn's serve loop: + bodyBytes int64 // body bytes seen so far + declBodyBytes int64 // or -1 if undeclared + flow flow // limits writing from Handler to client + inflow flow // what the client is allowed to POST/etc to us + parent *stream // or nil + numTrailerValues int64 + weight uint8 + state streamState + resetQueued bool // RST_STREAM queued for write; set by sc.resetStream + gotTrailerHeader bool // HEADER frame for trailers was seen + wroteHeaders bool // whether we wrote headers (not status 100) + reqBuf []byte // if non-nil, body pipe buffer to return later at EOF + + trailer http.Header // accumulated trailers + reqTrailer http.Header // handler's Request.Trailer +} + +func (sc *serverConn) Framer() *Framer { return sc.framer } +func (sc *serverConn) CloseConn() error { return sc.conn.Close() } +func (sc *serverConn) Flush() error { return sc.bw.Flush() } +func (sc *serverConn) HeaderEncoder() (*hpack.Encoder, *bytes.Buffer) { + return sc.hpackEncoder, &sc.headerWriteBuf +} + +func (sc *serverConn) state(streamID uint32) (streamState, *stream) { + sc.serveG.check() + // http://tools.ietf.org/html/rfc7540#section-5.1 + if st, ok := sc.streams[streamID]; ok { + return st.state, st + } + // "The first use of a new stream identifier implicitly closes all + // streams in the "idle" state that might have been initiated by + // that peer with a lower-valued stream identifier. For example, if + // a client sends a HEADERS frame on stream 7 without ever sending a + // frame on stream 5, then stream 5 transitions to the "closed" + // state when the first frame for stream 7 is sent or received." + if streamID%2 == 1 { + if streamID <= sc.maxClientStreamID { + return stateClosed, nil + } + } else { + if streamID <= sc.maxPushPromiseID { + return stateClosed, nil + } + } + return stateIdle, nil +} + +// setConnState calls the net/http ConnState hook for this connection, if configured. +// Note that the net/http package does StateNew and StateClosed for us. +// There is currently no plan for StateHijacked or hijacking HTTP/2 connections. +func (sc *serverConn) setConnState(state http.ConnState) { + if sc.hs.ConnState != nil { + sc.hs.ConnState(sc.conn, state) + } +} + +func (sc *serverConn) vlogf(format string, args ...interface{}) { + if VerboseLogs { + sc.logf(format, args...) + } +} + +func (sc *serverConn) logf(format string, args ...interface{}) { + if lg := sc.hs.ErrorLog; lg != nil { + lg.Printf(format, args...) + } else { + log.Printf(format, args...) + } +} + +// errno returns v's underlying uintptr, else 0. +// +// TODO: remove this helper function once http2 can use build +// tags. See comment in isClosedConnError. +func errno(v error) uintptr { + if rv := reflect.ValueOf(v); rv.Kind() == reflect.Uintptr { + return uintptr(rv.Uint()) + } + return 0 +} + +// isClosedConnError reports whether err is an error from use of a closed +// network connection. +func isClosedConnError(err error) bool { + if err == nil { + return false + } + + // TODO: remove this string search and be more like the Windows + // case below. That might involve modifying the standard library + // to return better error types. + str := err.Error() + if strings.Contains(str, "use of closed network connection") { + return true + } + + // TODO(bradfitz): x/tools/cmd/bundle doesn't really support + // build tags, so I can't make an http2_windows.go file with + // Windows-specific stuff. Fix that and move this, once we + // have a way to bundle this into std's net/http somehow. + if runtime.GOOS == "windows" { + if oe, ok := err.(*net.OpError); ok && oe.Op == "read" { + if se, ok := oe.Err.(*os.SyscallError); ok && se.Syscall == "wsarecv" { + const WSAECONNABORTED = 10053 + const WSAECONNRESET = 10054 + if n := errno(se.Err); n == WSAECONNRESET || n == WSAECONNABORTED { + return true + } + } + } + } + return false +} + +func (sc *serverConn) condlogf(err error, format string, args ...interface{}) { + if err == nil { + return + } + if err == io.EOF || err == io.ErrUnexpectedEOF || isClosedConnError(err) { + // Boring, expected errors. + sc.vlogf(format, args...) + } else { + sc.logf(format, args...) + } +} + +func (sc *serverConn) canonicalHeader(v string) string { + sc.serveG.check() + cv, ok := commonCanonHeader[v] + if ok { + return cv + } + cv, ok = sc.canonHeader[v] + if ok { + return cv + } + if sc.canonHeader == nil { + sc.canonHeader = make(map[string]string) + } + cv = http.CanonicalHeaderKey(v) + sc.canonHeader[v] = cv + return cv +} + +type readFrameResult struct { + f Frame // valid until readMore is called + err error + + // readMore should be called once the consumer no longer needs or + // retains f. After readMore, f is invalid and more frames can be + // read. + readMore func() +} + +// readFrames is the loop that reads incoming frames. +// It takes care to only read one frame at a time, blocking until the +// consumer is done with the frame. +// It's run on its own goroutine. +func (sc *serverConn) readFrames() { + gate := make(gate) + gateDone := gate.Done + for { + f, err := sc.framer.ReadFrame() + select { + case sc.readFrameCh <- readFrameResult{f, err, gateDone}: + case <-sc.doneServing: + return + } + select { + case <-gate: + case <-sc.doneServing: + return + } + if terminalReadFrameError(err) { + return + } + } +} + +// frameWriteResult is the message passed from writeFrameAsync to the serve goroutine. +type frameWriteResult struct { + wr FrameWriteRequest // what was written (or attempted) + err error // result of the writeFrame call +} + +// writeFrameAsync runs in its own goroutine and writes a single frame +// and then reports when it's done. +// At most one goroutine can be running writeFrameAsync at a time per +// serverConn. +func (sc *serverConn) writeFrameAsync(wr FrameWriteRequest) { + err := wr.write.writeFrame(sc) + sc.wroteFrameCh <- frameWriteResult{wr, err} +} + +func (sc *serverConn) closeAllStreamsOnConnClose() { + sc.serveG.check() + for _, st := range sc.streams { + sc.closeStream(st, errClientDisconnected) + } +} + +func (sc *serverConn) stopShutdownTimer() { + sc.serveG.check() + if t := sc.shutdownTimer; t != nil { + t.Stop() + } +} + +func (sc *serverConn) notePanic() { + // Note: this is for serverConn.serve panicking, not http.Handler code. + if testHookOnPanicMu != nil { + testHookOnPanicMu.Lock() + defer testHookOnPanicMu.Unlock() + } + if testHookOnPanic != nil { + if e := recover(); e != nil { + if testHookOnPanic(sc, e) { + panic(e) + } + } + } +} + +func (sc *serverConn) serve() { + sc.serveG.check() + defer sc.notePanic() + defer sc.conn.Close() + defer sc.closeAllStreamsOnConnClose() + defer sc.stopShutdownTimer() + defer close(sc.doneServing) // unblocks handlers trying to send + + if VerboseLogs { + sc.vlogf("http2: server connection from %v on %p", sc.conn.RemoteAddr(), sc.hs) + } + + sc.writeFrame(FrameWriteRequest{ + write: writeSettings{ + {SettingMaxFrameSize, sc.srv.maxReadFrameSize()}, + {SettingMaxConcurrentStreams, sc.advMaxStreams}, + {SettingMaxHeaderListSize, sc.maxHeaderListSize()}, + + // TODO: more actual settings, notably + // SettingInitialWindowSize, but then we also + // want to bump up the conn window size the + // same amount here right after the settings + }, + }) + sc.unackedSettings++ + + if err := sc.readPreface(); err != nil { + sc.condlogf(err, "http2: server: error reading preface from client %v: %v", sc.conn.RemoteAddr(), err) + return + } + // Now that we've got the preface, get us out of the + // "StateNew" state. We can't go directly to idle, though. + // Active means we read some data and anticipate a request. We'll + // do another Active when we get a HEADERS frame. + sc.setConnState(http.StateActive) + sc.setConnState(http.StateIdle) + + if sc.srv.IdleTimeout != 0 { + sc.idleTimer = time.NewTimer(sc.srv.IdleTimeout) + defer sc.idleTimer.Stop() + sc.idleTimerCh = sc.idleTimer.C + } + + var gracefulShutdownCh <-chan struct{} + if sc.hs != nil { + gracefulShutdownCh = h1ServerShutdownChan(sc.hs) + } + + go sc.readFrames() // closed by defer sc.conn.Close above + + settingsTimer := time.NewTimer(firstSettingsTimeout) + loopNum := 0 + for { + loopNum++ + select { + case wr := <-sc.wantWriteFrameCh: + sc.writeFrame(wr) + case spr := <-sc.wantStartPushCh: + sc.startPush(spr) + case res := <-sc.wroteFrameCh: + sc.wroteFrame(res) + case res := <-sc.readFrameCh: + if !sc.processFrameFromReader(res) { + return + } + res.readMore() + if settingsTimer.C != nil { + settingsTimer.Stop() + settingsTimer.C = nil + } + case m := <-sc.bodyReadCh: + sc.noteBodyRead(m.st, m.n) + case <-settingsTimer.C: + sc.logf("timeout waiting for SETTINGS frames from %v", sc.conn.RemoteAddr()) + return + case <-gracefulShutdownCh: + gracefulShutdownCh = nil + sc.startGracefulShutdown() + case <-sc.shutdownTimerCh: + sc.vlogf("GOAWAY close timer fired; closing conn from %v", sc.conn.RemoteAddr()) + return + case <-sc.idleTimerCh: + sc.vlogf("connection is idle") + sc.goAway(ErrCodeNo) + case fn := <-sc.testHookCh: + fn(loopNum) + } + + if sc.inGoAway && sc.curOpenStreams() == 0 && !sc.needToSendGoAway && !sc.writingFrame { + return + } + } +} + +// readPreface reads the ClientPreface greeting from the peer +// or returns an error on timeout or an invalid greeting. +func (sc *serverConn) readPreface() error { + errc := make(chan error, 1) + go func() { + // Read the client preface + buf := make([]byte, len(ClientPreface)) + if _, err := io.ReadFull(sc.conn, buf); err != nil { + errc <- err + } else if !bytes.Equal(buf, clientPreface) { + errc <- fmt.Errorf("bogus greeting %q", buf) + } else { + errc <- nil + } + }() + timer := time.NewTimer(prefaceTimeout) // TODO: configurable on *Server? + defer timer.Stop() + select { + case <-timer.C: + return errors.New("timeout waiting for client preface") + case err := <-errc: + if err == nil { + if VerboseLogs { + sc.vlogf("http2: server: client %v said hello", sc.conn.RemoteAddr()) + } + } + return err + } +} + +var errChanPool = sync.Pool{ + New: func() interface{} { return make(chan error, 1) }, +} + +var writeDataPool = sync.Pool{ + New: func() interface{} { return new(writeData) }, +} + +// writeDataFromHandler writes DATA response frames from a handler on +// the given stream. +func (sc *serverConn) writeDataFromHandler(stream *stream, data []byte, endStream bool) error { + ch := errChanPool.Get().(chan error) + writeArg := writeDataPool.Get().(*writeData) + *writeArg = writeData{stream.id, data, endStream} + err := sc.writeFrameFromHandler(FrameWriteRequest{ + write: writeArg, + stream: stream, + done: ch, + }) + if err != nil { + return err + } + var frameWriteDone bool // the frame write is done (successfully or not) + select { + case err = <-ch: + frameWriteDone = true + case <-sc.doneServing: + return errClientDisconnected + case <-stream.cw: + // If both ch and stream.cw were ready (as might + // happen on the final Write after an http.Handler + // ends), prefer the write result. Otherwise this + // might just be us successfully closing the stream. + // The writeFrameAsync and serve goroutines guarantee + // that the ch send will happen before the stream.cw + // close. + select { + case err = <-ch: + frameWriteDone = true + default: + return errStreamClosed + } + } + errChanPool.Put(ch) + if frameWriteDone { + writeDataPool.Put(writeArg) + } + return err +} + +// writeFrameFromHandler sends wr to sc.wantWriteFrameCh, but aborts +// if the connection has gone away. +// +// This must not be run from the serve goroutine itself, else it might +// deadlock writing to sc.wantWriteFrameCh (which is only mildly +// buffered and is read by serve itself). If you're on the serve +// goroutine, call writeFrame instead. +func (sc *serverConn) writeFrameFromHandler(wr FrameWriteRequest) error { + sc.serveG.checkNotOn() // NOT + select { + case sc.wantWriteFrameCh <- wr: + return nil + case <-sc.doneServing: + // Serve loop is gone. + // Client has closed their connection to the server. + return errClientDisconnected + } +} + +// writeFrame schedules a frame to write and sends it if there's nothing +// already being written. +// +// There is no pushback here (the serve goroutine never blocks). It's +// the http.Handlers that block, waiting for their previous frames to +// make it onto the wire +// +// If you're not on the serve goroutine, use writeFrameFromHandler instead. +func (sc *serverConn) writeFrame(wr FrameWriteRequest) { + sc.serveG.check() + + // If true, wr will not be written and wr.done will not be signaled. + var ignoreWrite bool + + // We are not allowed to write frames on closed streams. RFC 7540 Section + // 5.1.1 says: "An endpoint MUST NOT send frames other than PRIORITY on + // a closed stream." Our server never sends PRIORITY, so that exception + // does not apply. + // + // The serverConn might close an open stream while the stream's handler + // is still running. For example, the server might close a stream when it + // receives bad data from the client. If this happens, the handler might + // attempt to write a frame after the stream has been closed (since the + // handler hasn't yet been notified of the close). In this case, we simply + // ignore the frame. The handler will notice that the stream is closed when + // it waits for the frame to be written. + // + // As an exception to this rule, we allow sending RST_STREAM after close. + // This allows us to immediately reject new streams without tracking any + // state for those streams (except for the queued RST_STREAM frame). This + // may result in duplicate RST_STREAMs in some cases, but the client should + // ignore those. + if wr.StreamID() != 0 { + _, isReset := wr.write.(StreamError) + if state, _ := sc.state(wr.StreamID()); state == stateClosed && !isReset { + ignoreWrite = true + } + } + + // Don't send a 100-continue response if we've already sent headers. + // See golang.org/issue/14030. + switch wr.write.(type) { + case *writeResHeaders: + wr.stream.wroteHeaders = true + case write100ContinueHeadersFrame: + if wr.stream.wroteHeaders { + // We do not need to notify wr.done because this frame is + // never written with wr.done != nil. + if wr.done != nil { + panic("wr.done != nil for write100ContinueHeadersFrame") + } + ignoreWrite = true + } + } + + if !ignoreWrite { + sc.writeSched.Push(wr) + } + sc.scheduleFrameWrite() +} + +// startFrameWrite starts a goroutine to write wr (in a separate +// goroutine since that might block on the network), and updates the +// serve goroutine's state about the world, updated from info in wr. +func (sc *serverConn) startFrameWrite(wr FrameWriteRequest) { + sc.serveG.check() + if sc.writingFrame { + panic("internal error: can only be writing one frame at a time") + } + + st := wr.stream + if st != nil { + switch st.state { + case stateHalfClosedLocal: + switch wr.write.(type) { + case StreamError, handlerPanicRST, writeWindowUpdate: + // RFC 7540 Section 5.1 allows sending RST_STREAM, PRIORITY, and WINDOW_UPDATE + // in this state. (We never send PRIORITY from the server, so that is not checked.) + default: + panic(fmt.Sprintf("internal error: attempt to send frame on a half-closed-local stream: %v", wr)) + } + case stateClosed: + panic(fmt.Sprintf("internal error: attempt to send frame on a closed stream: %v", wr)) + } + } + if wpp, ok := wr.write.(*writePushPromise); ok { + var err error + wpp.promisedID, err = wpp.allocatePromisedID() + if err != nil { + sc.writingFrameAsync = false + wr.replyToWriter(err) + return + } + } + + sc.writingFrame = true + sc.needsFrameFlush = true + if wr.write.staysWithinBuffer(sc.bw.Available()) { + sc.writingFrameAsync = false + err := wr.write.writeFrame(sc) + sc.wroteFrame(frameWriteResult{wr, err}) + } else { + sc.writingFrameAsync = true + go sc.writeFrameAsync(wr) + } +} + +// errHandlerPanicked is the error given to any callers blocked in a read from +// Request.Body when the main goroutine panics. Since most handlers read in the +// the main ServeHTTP goroutine, this will show up rarely. +var errHandlerPanicked = errors.New("http2: handler panicked") + +// wroteFrame is called on the serve goroutine with the result of +// whatever happened on writeFrameAsync. +func (sc *serverConn) wroteFrame(res frameWriteResult) { + sc.serveG.check() + if !sc.writingFrame { + panic("internal error: expected to be already writing a frame") + } + sc.writingFrame = false + sc.writingFrameAsync = false + + wr := res.wr + + if writeEndsStream(wr.write) { + st := wr.stream + if st == nil { + panic("internal error: expecting non-nil stream") + } + switch st.state { + case stateOpen: + // Here we would go to stateHalfClosedLocal in + // theory, but since our handler is done and + // the net/http package provides no mechanism + // for closing a ResponseWriter while still + // reading data (see possible TODO at top of + // this file), we go into closed state here + // anyway, after telling the peer we're + // hanging up on them. We'll transition to + // stateClosed after the RST_STREAM frame is + // written. + st.state = stateHalfClosedLocal + sc.resetStream(streamError(st.id, ErrCodeCancel)) + case stateHalfClosedRemote: + sc.closeStream(st, errHandlerComplete) + } + } else { + switch v := wr.write.(type) { + case StreamError: + // st may be unknown if the RST_STREAM was generated to reject bad input. + if st, ok := sc.streams[v.StreamID]; ok { + sc.closeStream(st, v) + } + case handlerPanicRST: + sc.closeStream(wr.stream, errHandlerPanicked) + } + } + + // Reply (if requested) to unblock the ServeHTTP goroutine. + wr.replyToWriter(res.err) + + sc.scheduleFrameWrite() +} + +// scheduleFrameWrite tickles the frame writing scheduler. +// +// If a frame is already being written, nothing happens. This will be called again +// when the frame is done being written. +// +// If a frame isn't being written we need to send one, the best frame +// to send is selected, preferring first things that aren't +// stream-specific (e.g. ACKing settings), and then finding the +// highest priority stream. +// +// If a frame isn't being written and there's nothing else to send, we +// flush the write buffer. +func (sc *serverConn) scheduleFrameWrite() { + sc.serveG.check() + if sc.writingFrame || sc.inFrameScheduleLoop { + return + } + sc.inFrameScheduleLoop = true + for !sc.writingFrameAsync { + if sc.needToSendGoAway { + sc.needToSendGoAway = false + sc.startFrameWrite(FrameWriteRequest{ + write: &writeGoAway{ + maxStreamID: sc.maxClientStreamID, + code: sc.goAwayCode, + }, + }) + continue + } + if sc.needToSendSettingsAck { + sc.needToSendSettingsAck = false + sc.startFrameWrite(FrameWriteRequest{write: writeSettingsAck{}}) + continue + } + if !sc.inGoAway || sc.goAwayCode == ErrCodeNo { + if wr, ok := sc.writeSched.Pop(); ok { + sc.startFrameWrite(wr) + continue + } + } + if sc.needsFrameFlush { + sc.startFrameWrite(FrameWriteRequest{write: flushFrameWriter{}}) + sc.needsFrameFlush = false // after startFrameWrite, since it sets this true + continue + } + break + } + sc.inFrameScheduleLoop = false +} + +// startGracefulShutdown sends a GOAWAY with ErrCodeNo to tell the +// client we're gracefully shutting down. The connection isn't closed +// until all current streams are done. +func (sc *serverConn) startGracefulShutdown() { + sc.goAwayIn(ErrCodeNo, 0) +} + +func (sc *serverConn) goAway(code ErrCode) { + sc.serveG.check() + var forceCloseIn time.Duration + if code != ErrCodeNo { + forceCloseIn = 250 * time.Millisecond + } else { + // TODO: configurable + forceCloseIn = 1 * time.Second + } + sc.goAwayIn(code, forceCloseIn) +} + +func (sc *serverConn) goAwayIn(code ErrCode, forceCloseIn time.Duration) { + sc.serveG.check() + if sc.inGoAway { + return + } + if forceCloseIn != 0 { + sc.shutDownIn(forceCloseIn) + } + sc.inGoAway = true + sc.needToSendGoAway = true + sc.goAwayCode = code + sc.scheduleFrameWrite() +} + +func (sc *serverConn) shutDownIn(d time.Duration) { + sc.serveG.check() + sc.shutdownTimer = time.NewTimer(d) + sc.shutdownTimerCh = sc.shutdownTimer.C +} + +func (sc *serverConn) resetStream(se StreamError) { + sc.serveG.check() + sc.writeFrame(FrameWriteRequest{write: se}) + if st, ok := sc.streams[se.StreamID]; ok { + st.resetQueued = true + } +} + +// processFrameFromReader processes the serve loop's read from readFrameCh from the +// frame-reading goroutine. +// processFrameFromReader returns whether the connection should be kept open. +func (sc *serverConn) processFrameFromReader(res readFrameResult) bool { + sc.serveG.check() + err := res.err + if err != nil { + if err == ErrFrameTooLarge { + sc.goAway(ErrCodeFrameSize) + return true // goAway will close the loop + } + clientGone := err == io.EOF || err == io.ErrUnexpectedEOF || isClosedConnError(err) + if clientGone { + // TODO: could we also get into this state if + // the peer does a half close + // (e.g. CloseWrite) because they're done + // sending frames but they're still wanting + // our open replies? Investigate. + // TODO: add CloseWrite to crypto/tls.Conn first + // so we have a way to test this? I suppose + // just for testing we could have a non-TLS mode. + return false + } + } else { + f := res.f + if VerboseLogs { + sc.vlogf("http2: server read frame %v", summarizeFrame(f)) + } + err = sc.processFrame(f) + if err == nil { + return true + } + } + + switch ev := err.(type) { + case StreamError: + sc.resetStream(ev) + return true + case goAwayFlowError: + sc.goAway(ErrCodeFlowControl) + return true + case ConnectionError: + sc.logf("http2: server connection error from %v: %v", sc.conn.RemoteAddr(), ev) + sc.goAway(ErrCode(ev)) + return true // goAway will handle shutdown + default: + if res.err != nil { + sc.vlogf("http2: server closing client connection; error reading frame from client %s: %v", sc.conn.RemoteAddr(), err) + } else { + sc.logf("http2: server closing client connection: %v", err) + } + return false + } +} + +func (sc *serverConn) processFrame(f Frame) error { + sc.serveG.check() + + // First frame received must be SETTINGS. + if !sc.sawFirstSettings { + if _, ok := f.(*SettingsFrame); !ok { + return ConnectionError(ErrCodeProtocol) + } + sc.sawFirstSettings = true + } + + switch f := f.(type) { + case *SettingsFrame: + return sc.processSettings(f) + case *MetaHeadersFrame: + return sc.processHeaders(f) + case *WindowUpdateFrame: + return sc.processWindowUpdate(f) + case *PingFrame: + return sc.processPing(f) + case *DataFrame: + return sc.processData(f) + case *RSTStreamFrame: + return sc.processResetStream(f) + case *PriorityFrame: + return sc.processPriority(f) + case *GoAwayFrame: + return sc.processGoAway(f) + case *PushPromiseFrame: + // A client cannot push. Thus, servers MUST treat the receipt of a PUSH_PROMISE + // frame as a connection error (Section 5.4.1) of type PROTOCOL_ERROR. + return ConnectionError(ErrCodeProtocol) + default: + sc.vlogf("http2: server ignoring frame: %v", f.Header()) + return nil + } +} + +func (sc *serverConn) processPing(f *PingFrame) error { + sc.serveG.check() + if f.IsAck() { + // 6.7 PING: " An endpoint MUST NOT respond to PING frames + // containing this flag." + return nil + } + if f.StreamID != 0 { + // "PING frames are not associated with any individual + // stream. If a PING frame is received with a stream + // identifier field value other than 0x0, the recipient MUST + // respond with a connection error (Section 5.4.1) of type + // PROTOCOL_ERROR." + return ConnectionError(ErrCodeProtocol) + } + if sc.inGoAway && sc.goAwayCode != ErrCodeNo { + return nil + } + sc.writeFrame(FrameWriteRequest{write: writePingAck{f}}) + return nil +} + +func (sc *serverConn) processWindowUpdate(f *WindowUpdateFrame) error { + sc.serveG.check() + switch { + case f.StreamID != 0: // stream-level flow control + state, st := sc.state(f.StreamID) + if state == stateIdle { + // Section 5.1: "Receiving any frame other than HEADERS + // or PRIORITY on a stream in this state MUST be + // treated as a connection error (Section 5.4.1) of + // type PROTOCOL_ERROR." + return ConnectionError(ErrCodeProtocol) + } + if st == nil { + // "WINDOW_UPDATE can be sent by a peer that has sent a + // frame bearing the END_STREAM flag. This means that a + // receiver could receive a WINDOW_UPDATE frame on a "half + // closed (remote)" or "closed" stream. A receiver MUST + // NOT treat this as an error, see Section 5.1." + return nil + } + if !st.flow.add(int32(f.Increment)) { + return streamError(f.StreamID, ErrCodeFlowControl) + } + default: // connection-level flow control + if !sc.flow.add(int32(f.Increment)) { + return goAwayFlowError{} + } + } + sc.scheduleFrameWrite() + return nil +} + +func (sc *serverConn) processResetStream(f *RSTStreamFrame) error { + sc.serveG.check() + + state, st := sc.state(f.StreamID) + if state == stateIdle { + // 6.4 "RST_STREAM frames MUST NOT be sent for a + // stream in the "idle" state. If a RST_STREAM frame + // identifying an idle stream is received, the + // recipient MUST treat this as a connection error + // (Section 5.4.1) of type PROTOCOL_ERROR. + return ConnectionError(ErrCodeProtocol) + } + if st != nil { + st.cancelCtx() + sc.closeStream(st, streamError(f.StreamID, f.ErrCode)) + } + return nil +} + +func (sc *serverConn) closeStream(st *stream, err error) { + sc.serveG.check() + if st.state == stateIdle || st.state == stateClosed { + panic(fmt.Sprintf("invariant; can't close stream in state %v", st.state)) + } + st.state = stateClosed + if st.isPushed() { + sc.curPushedStreams-- + } else { + sc.curClientStreams-- + } + delete(sc.streams, st.id) + if len(sc.streams) == 0 { + sc.setConnState(http.StateIdle) + if sc.srv.IdleTimeout != 0 { + sc.idleTimer.Reset(sc.srv.IdleTimeout) + } + if h1ServerKeepAlivesDisabled(sc.hs) { + sc.startGracefulShutdown() + } + } + if p := st.body; p != nil { + // Return any buffered unread bytes worth of conn-level flow control. + // See golang.org/issue/16481 + sc.sendWindowUpdate(nil, p.Len()) + + p.CloseWithError(err) + } + st.cw.Close() // signals Handler's CloseNotifier, unblocks writes, etc + sc.writeSched.CloseStream(st.id) +} + +func (sc *serverConn) processSettings(f *SettingsFrame) error { + sc.serveG.check() + if f.IsAck() { + sc.unackedSettings-- + if sc.unackedSettings < 0 { + // Why is the peer ACKing settings we never sent? + // The spec doesn't mention this case, but + // hang up on them anyway. + return ConnectionError(ErrCodeProtocol) + } + return nil + } + if err := f.ForeachSetting(sc.processSetting); err != nil { + return err + } + sc.needToSendSettingsAck = true + sc.scheduleFrameWrite() + return nil +} + +func (sc *serverConn) processSetting(s Setting) error { + sc.serveG.check() + if err := s.Valid(); err != nil { + return err + } + if VerboseLogs { + sc.vlogf("http2: server processing setting %v", s) + } + switch s.ID { + case SettingHeaderTableSize: + sc.headerTableSize = s.Val + sc.hpackEncoder.SetMaxDynamicTableSize(s.Val) + case SettingEnablePush: + sc.pushEnabled = s.Val != 0 + case SettingMaxConcurrentStreams: + sc.clientMaxStreams = s.Val + case SettingInitialWindowSize: + return sc.processSettingInitialWindowSize(s.Val) + case SettingMaxFrameSize: + sc.maxFrameSize = int32(s.Val) // the maximum valid s.Val is < 2^31 + case SettingMaxHeaderListSize: + sc.peerMaxHeaderListSize = s.Val + default: + // Unknown setting: "An endpoint that receives a SETTINGS + // frame with any unknown or unsupported identifier MUST + // ignore that setting." + if VerboseLogs { + sc.vlogf("http2: server ignoring unknown setting %v", s) + } + } + return nil +} + +func (sc *serverConn) processSettingInitialWindowSize(val uint32) error { + sc.serveG.check() + // Note: val already validated to be within range by + // processSetting's Valid call. + + // "A SETTINGS frame can alter the initial flow control window + // size for all current streams. When the value of + // SETTINGS_INITIAL_WINDOW_SIZE changes, a receiver MUST + // adjust the size of all stream flow control windows that it + // maintains by the difference between the new value and the + // old value." + old := sc.initialWindowSize + sc.initialWindowSize = int32(val) + growth := sc.initialWindowSize - old // may be negative + for _, st := range sc.streams { + if !st.flow.add(growth) { + // 6.9.2 Initial Flow Control Window Size + // "An endpoint MUST treat a change to + // SETTINGS_INITIAL_WINDOW_SIZE that causes any flow + // control window to exceed the maximum size as a + // connection error (Section 5.4.1) of type + // FLOW_CONTROL_ERROR." + return ConnectionError(ErrCodeFlowControl) + } + } + return nil +} + +func (sc *serverConn) processData(f *DataFrame) error { + sc.serveG.check() + if sc.inGoAway && sc.goAwayCode != ErrCodeNo { + return nil + } + data := f.Data() + + // "If a DATA frame is received whose stream is not in "open" + // or "half closed (local)" state, the recipient MUST respond + // with a stream error (Section 5.4.2) of type STREAM_CLOSED." + id := f.Header().StreamID + state, st := sc.state(id) + if id == 0 || state == stateIdle { + // Section 5.1: "Receiving any frame other than HEADERS + // or PRIORITY on a stream in this state MUST be + // treated as a connection error (Section 5.4.1) of + // type PROTOCOL_ERROR." + return ConnectionError(ErrCodeProtocol) + } + if st == nil || state != stateOpen || st.gotTrailerHeader || st.resetQueued { + // This includes sending a RST_STREAM if the stream is + // in stateHalfClosedLocal (which currently means that + // the http.Handler returned, so it's done reading & + // done writing). Try to stop the client from sending + // more DATA. + + // But still enforce their connection-level flow control, + // and return any flow control bytes since we're not going + // to consume them. + if sc.inflow.available() < int32(f.Length) { + return streamError(id, ErrCodeFlowControl) + } + // Deduct the flow control from inflow, since we're + // going to immediately add it back in + // sendWindowUpdate, which also schedules sending the + // frames. + sc.inflow.take(int32(f.Length)) + sc.sendWindowUpdate(nil, int(f.Length)) // conn-level + + if st != nil && st.resetQueued { + // Already have a stream error in flight. Don't send another. + return nil + } + return streamError(id, ErrCodeStreamClosed) + } + if st.body == nil { + panic("internal error: should have a body in this state") + } + + // Sender sending more than they'd declared? + if st.declBodyBytes != -1 && st.bodyBytes+int64(len(data)) > st.declBodyBytes { + st.body.CloseWithError(fmt.Errorf("sender tried to send more than declared Content-Length of %d bytes", st.declBodyBytes)) + return streamError(id, ErrCodeStreamClosed) + } + if f.Length > 0 { + // Check whether the client has flow control quota. + if st.inflow.available() < int32(f.Length) { + return streamError(id, ErrCodeFlowControl) + } + st.inflow.take(int32(f.Length)) + + if len(data) > 0 { + wrote, err := st.body.Write(data) + if err != nil { + return streamError(id, ErrCodeStreamClosed) + } + if wrote != len(data) { + panic("internal error: bad Writer") + } + st.bodyBytes += int64(len(data)) + } + + // Return any padded flow control now, since we won't + // refund it later on body reads. + if pad := int32(f.Length) - int32(len(data)); pad > 0 { + sc.sendWindowUpdate32(nil, pad) + sc.sendWindowUpdate32(st, pad) + } + } + if f.StreamEnded() { + st.endStream() + } + return nil +} + +func (sc *serverConn) processGoAway(f *GoAwayFrame) error { + sc.serveG.check() + if f.ErrCode != ErrCodeNo { + sc.logf("http2: received GOAWAY %+v, starting graceful shutdown", f) + } else { + sc.vlogf("http2: received GOAWAY %+v, starting graceful shutdown", f) + } + sc.startGracefulShutdown() + // http://tools.ietf.org/html/rfc7540#section-6.8 + // We should not create any new streams, which means we should disable push. + sc.pushEnabled = false + return nil +} + +// isPushed reports whether the stream is server-initiated. +func (st *stream) isPushed() bool { + return st.id%2 == 0 +} + +// endStream closes a Request.Body's pipe. It is called when a DATA +// frame says a request body is over (or after trailers). +func (st *stream) endStream() { + sc := st.sc + sc.serveG.check() + + if st.declBodyBytes != -1 && st.declBodyBytes != st.bodyBytes { + st.body.CloseWithError(fmt.Errorf("request declared a Content-Length of %d but only wrote %d bytes", + st.declBodyBytes, st.bodyBytes)) + } else { + st.body.closeWithErrorAndCode(io.EOF, st.copyTrailersToHandlerRequest) + st.body.CloseWithError(io.EOF) + } + st.state = stateHalfClosedRemote +} + +// copyTrailersToHandlerRequest is run in the Handler's goroutine in +// its Request.Body.Read just before it gets io.EOF. +func (st *stream) copyTrailersToHandlerRequest() { + for k, vv := range st.trailer { + if _, ok := st.reqTrailer[k]; ok { + // Only copy it over it was pre-declared. + st.reqTrailer[k] = vv + } + } +} + +func (sc *serverConn) processHeaders(f *MetaHeadersFrame) error { + sc.serveG.check() + id := f.StreamID + if sc.inGoAway { + // Ignore. + return nil + } + // http://tools.ietf.org/html/rfc7540#section-5.1.1 + // Streams initiated by a client MUST use odd-numbered stream + // identifiers. [...] An endpoint that receives an unexpected + // stream identifier MUST respond with a connection error + // (Section 5.4.1) of type PROTOCOL_ERROR. + if id%2 != 1 { + return ConnectionError(ErrCodeProtocol) + } + // A HEADERS frame can be used to create a new stream or + // send a trailer for an open one. If we already have a stream + // open, let it process its own HEADERS frame (trailers at this + // point, if it's valid). + if st := sc.streams[f.StreamID]; st != nil { + if st.resetQueued { + // We're sending RST_STREAM to close the stream, so don't bother + // processing this frame. + return nil + } + return st.processTrailerHeaders(f) + } + + // [...] The identifier of a newly established stream MUST be + // numerically greater than all streams that the initiating + // endpoint has opened or reserved. [...] An endpoint that + // receives an unexpected stream identifier MUST respond with + // a connection error (Section 5.4.1) of type PROTOCOL_ERROR. + if id <= sc.maxClientStreamID { + return ConnectionError(ErrCodeProtocol) + } + sc.maxClientStreamID = id + + if sc.idleTimer != nil { + sc.idleTimer.Stop() + } + + // http://tools.ietf.org/html/rfc7540#section-5.1.2 + // [...] Endpoints MUST NOT exceed the limit set by their peer. An + // endpoint that receives a HEADERS frame that causes their + // advertised concurrent stream limit to be exceeded MUST treat + // this as a stream error (Section 5.4.2) of type PROTOCOL_ERROR + // or REFUSED_STREAM. + if sc.curClientStreams+1 > sc.advMaxStreams { + if sc.unackedSettings == 0 { + // They should know better. + return streamError(id, ErrCodeProtocol) + } + // Assume it's a network race, where they just haven't + // received our last SETTINGS update. But actually + // this can't happen yet, because we don't yet provide + // a way for users to adjust server parameters at + // runtime. + return streamError(id, ErrCodeRefusedStream) + } + + initialState := stateOpen + if f.StreamEnded() { + initialState = stateHalfClosedRemote + } + st := sc.newStream(id, 0, initialState) + + if f.HasPriority() { + if err := checkPriority(f.StreamID, f.Priority); err != nil { + return err + } + sc.writeSched.AdjustStream(st.id, f.Priority) + } + + rw, req, err := sc.newWriterAndRequest(st, f) + if err != nil { + return err + } + st.reqTrailer = req.Trailer + if st.reqTrailer != nil { + st.trailer = make(http.Header) + } + st.body = req.Body.(*requestBody).pipe // may be nil + st.declBodyBytes = req.ContentLength + + handler := sc.handler.ServeHTTP + if f.Truncated { + // Their header list was too long. Send a 431 error. + handler = handleHeaderListTooLong + } else if err := checkValidHTTP2RequestHeaders(req.Header); err != nil { + handler = new400Handler(err) + } + + // The net/http package sets the read deadline from the + // http.Server.ReadTimeout during the TLS handshake, but then + // passes the connection off to us with the deadline already + // set. Disarm it here after the request headers are read, + // similar to how the http1 server works. Here it's + // technically more like the http1 Server's ReadHeaderTimeout + // (in Go 1.8), though. That's a more sane option anyway. + if sc.hs.ReadTimeout != 0 { + sc.conn.SetReadDeadline(time.Time{}) + } + + go sc.runHandler(rw, req, handler) + return nil +} + +func (st *stream) processTrailerHeaders(f *MetaHeadersFrame) error { + sc := st.sc + sc.serveG.check() + if st.gotTrailerHeader { + return ConnectionError(ErrCodeProtocol) + } + st.gotTrailerHeader = true + if !f.StreamEnded() { + return streamError(st.id, ErrCodeProtocol) + } + + if len(f.PseudoFields()) > 0 { + return streamError(st.id, ErrCodeProtocol) + } + if st.trailer != nil { + for _, hf := range f.RegularFields() { + key := sc.canonicalHeader(hf.Name) + if !ValidTrailerHeader(key) { + // TODO: send more details to the peer somehow. But http2 has + // no way to send debug data at a stream level. Discuss with + // HTTP folk. + return streamError(st.id, ErrCodeProtocol) + } + st.trailer[key] = append(st.trailer[key], hf.Value) + } + } + st.endStream() + return nil +} + +func checkPriority(streamID uint32, p PriorityParam) error { + if streamID == p.StreamDep { + // Section 5.3.1: "A stream cannot depend on itself. An endpoint MUST treat + // this as a stream error (Section 5.4.2) of type PROTOCOL_ERROR." + // Section 5.3.3 says that a stream can depend on one of its dependencies, + // so it's only self-dependencies that are forbidden. + return streamError(streamID, ErrCodeProtocol) + } + return nil +} + +func (sc *serverConn) processPriority(f *PriorityFrame) error { + if sc.inGoAway { + return nil + } + if err := checkPriority(f.StreamID, f.PriorityParam); err != nil { + return err + } + sc.writeSched.AdjustStream(f.StreamID, f.PriorityParam) + return nil +} + +func (sc *serverConn) newStream(id, pusherID uint32, state streamState) *stream { + sc.serveG.check() + if id == 0 { + panic("internal error: cannot create stream with id 0") + } + + ctx, cancelCtx := contextWithCancel(sc.baseCtx) + st := &stream{ + sc: sc, + id: id, + state: state, + ctx: ctx, + cancelCtx: cancelCtx, + } + st.cw.Init() + st.flow.conn = &sc.flow // link to conn-level counter + st.flow.add(sc.initialWindowSize) + st.inflow.conn = &sc.inflow // link to conn-level counter + st.inflow.add(initialWindowSize) // TODO: update this when we send a higher initial window size in the initial settings + + sc.streams[id] = st + sc.writeSched.OpenStream(st.id, OpenStreamOptions{PusherID: pusherID}) + if st.isPushed() { + sc.curPushedStreams++ + } else { + sc.curClientStreams++ + } + if sc.curOpenStreams() == 1 { + sc.setConnState(http.StateActive) + } + + return st +} + +func (sc *serverConn) newWriterAndRequest(st *stream, f *MetaHeadersFrame) (*responseWriter, *http.Request, error) { + sc.serveG.check() + + rp := requestParam{ + method: f.PseudoValue("method"), + scheme: f.PseudoValue("scheme"), + authority: f.PseudoValue("authority"), + path: f.PseudoValue("path"), + } + + isConnect := rp.method == "CONNECT" + if isConnect { + if rp.path != "" || rp.scheme != "" || rp.authority == "" { + return nil, nil, streamError(f.StreamID, ErrCodeProtocol) + } + } else if rp.method == "" || rp.path == "" || (rp.scheme != "https" && rp.scheme != "http") { + // See 8.1.2.6 Malformed Requests and Responses: + // + // Malformed requests or responses that are detected + // MUST be treated as a stream error (Section 5.4.2) + // of type PROTOCOL_ERROR." + // + // 8.1.2.3 Request Pseudo-Header Fields + // "All HTTP/2 requests MUST include exactly one valid + // value for the :method, :scheme, and :path + // pseudo-header fields" + return nil, nil, streamError(f.StreamID, ErrCodeProtocol) + } + + bodyOpen := !f.StreamEnded() + if rp.method == "HEAD" && bodyOpen { + // HEAD requests can't have bodies + return nil, nil, streamError(f.StreamID, ErrCodeProtocol) + } + + rp.header = make(http.Header) + for _, hf := range f.RegularFields() { + rp.header.Add(sc.canonicalHeader(hf.Name), hf.Value) + } + if rp.authority == "" { + rp.authority = rp.header.Get("Host") + } + + rw, req, err := sc.newWriterAndRequestNoBody(st, rp) + if err != nil { + return nil, nil, err + } + if bodyOpen { + st.reqBuf = getRequestBodyBuf() + req.Body.(*requestBody).pipe = &pipe{ + b: &fixedBuffer{buf: st.reqBuf}, + } + + if vv, ok := rp.header["Content-Length"]; ok { + req.ContentLength, _ = strconv.ParseInt(vv[0], 10, 64) + } else { + req.ContentLength = -1 + } + } + return rw, req, nil +} + +type requestParam struct { + method string + scheme, authority, path string + header http.Header +} + +func (sc *serverConn) newWriterAndRequestNoBody(st *stream, rp requestParam) (*responseWriter, *http.Request, error) { + sc.serveG.check() + + var tlsState *tls.ConnectionState // nil if not scheme https + if rp.scheme == "https" { + tlsState = sc.tlsState + } + + needsContinue := rp.header.Get("Expect") == "100-continue" + if needsContinue { + rp.header.Del("Expect") + } + // Merge Cookie headers into one "; "-delimited value. + if cookies := rp.header["Cookie"]; len(cookies) > 1 { + rp.header.Set("Cookie", strings.Join(cookies, "; ")) + } + + // Setup Trailers + var trailer http.Header + for _, v := range rp.header["Trailer"] { + for _, key := range strings.Split(v, ",") { + key = http.CanonicalHeaderKey(strings.TrimSpace(key)) + switch key { + case "Transfer-Encoding", "Trailer", "Content-Length": + // Bogus. (copy of http1 rules) + // Ignore. + default: + if trailer == nil { + trailer = make(http.Header) + } + trailer[key] = nil + } + } + } + delete(rp.header, "Trailer") + + var url_ *url.URL + var requestURI string + if rp.method == "CONNECT" { + url_ = &url.URL{Host: rp.authority} + requestURI = rp.authority // mimic HTTP/1 server behavior + } else { + var err error + url_, err = url.ParseRequestURI(rp.path) + if err != nil { + return nil, nil, streamError(st.id, ErrCodeProtocol) + } + requestURI = rp.path + } + + body := &requestBody{ + conn: sc, + stream: st, + needsContinue: needsContinue, + } + req := &http.Request{ + Method: rp.method, + URL: url_, + RemoteAddr: sc.remoteAddrStr, + Header: rp.header, + RequestURI: requestURI, + Proto: "HTTP/2.0", + ProtoMajor: 2, + ProtoMinor: 0, + TLS: tlsState, + Host: rp.authority, + Body: body, + Trailer: trailer, + } + req = requestWithContext(req, st.ctx) + + rws := responseWriterStatePool.Get().(*responseWriterState) + bwSave := rws.bw + *rws = responseWriterState{} // zero all the fields + rws.conn = sc + rws.bw = bwSave + rws.bw.Reset(chunkWriter{rws}) + rws.stream = st + rws.req = req + rws.body = body + + rw := &responseWriter{rws: rws} + return rw, req, nil +} + +var reqBodyCache = make(chan []byte, 8) + +func getRequestBodyBuf() []byte { + select { + case b := <-reqBodyCache: + return b + default: + return make([]byte, initialWindowSize) + } +} + +func putRequestBodyBuf(b []byte) { + select { + case reqBodyCache <- b: + default: + } +} + +// Run on its own goroutine. +func (sc *serverConn) runHandler(rw *responseWriter, req *http.Request, handler func(http.ResponseWriter, *http.Request)) { + didPanic := true + defer func() { + rw.rws.stream.cancelCtx() + if didPanic { + e := recover() + sc.writeFrameFromHandler(FrameWriteRequest{ + write: handlerPanicRST{rw.rws.stream.id}, + stream: rw.rws.stream, + }) + // Same as net/http: + if shouldLogPanic(e) { + const size = 64 << 10 + buf := make([]byte, size) + buf = buf[:runtime.Stack(buf, false)] + sc.logf("http2: panic serving %v: %v\n%s", sc.conn.RemoteAddr(), e, buf) + } + return + } + rw.handlerDone() + }() + handler(rw, req) + didPanic = false +} + +func handleHeaderListTooLong(w http.ResponseWriter, r *http.Request) { + // 10.5.1 Limits on Header Block Size: + // .. "A server that receives a larger header block than it is + // willing to handle can send an HTTP 431 (Request Header Fields Too + // Large) status code" + const statusRequestHeaderFieldsTooLarge = 431 // only in Go 1.6+ + w.WriteHeader(statusRequestHeaderFieldsTooLarge) + io.WriteString(w, "

HTTP Error 431

Request Header Field(s) Too Large

") +} + +// called from handler goroutines. +// h may be nil. +func (sc *serverConn) writeHeaders(st *stream, headerData *writeResHeaders) error { + sc.serveG.checkNotOn() // NOT on + var errc chan error + if headerData.h != nil { + // If there's a header map (which we don't own), so we have to block on + // waiting for this frame to be written, so an http.Flush mid-handler + // writes out the correct value of keys, before a handler later potentially + // mutates it. + errc = errChanPool.Get().(chan error) + } + if err := sc.writeFrameFromHandler(FrameWriteRequest{ + write: headerData, + stream: st, + done: errc, + }); err != nil { + return err + } + if errc != nil { + select { + case err := <-errc: + errChanPool.Put(errc) + return err + case <-sc.doneServing: + return errClientDisconnected + case <-st.cw: + return errStreamClosed + } + } + return nil +} + +// called from handler goroutines. +func (sc *serverConn) write100ContinueHeaders(st *stream) { + sc.writeFrameFromHandler(FrameWriteRequest{ + write: write100ContinueHeadersFrame{st.id}, + stream: st, + }) +} + +// A bodyReadMsg tells the server loop that the http.Handler read n +// bytes of the DATA from the client on the given stream. +type bodyReadMsg struct { + st *stream + n int +} + +// called from handler goroutines. +// Notes that the handler for the given stream ID read n bytes of its body +// and schedules flow control tokens to be sent. +func (sc *serverConn) noteBodyReadFromHandler(st *stream, n int, err error) { + sc.serveG.checkNotOn() // NOT on + if n > 0 { + select { + case sc.bodyReadCh <- bodyReadMsg{st, n}: + case <-sc.doneServing: + } + } + if err == io.EOF { + if buf := st.reqBuf; buf != nil { + st.reqBuf = nil // shouldn't matter; field unused by other + putRequestBodyBuf(buf) + } + } +} + +func (sc *serverConn) noteBodyRead(st *stream, n int) { + sc.serveG.check() + sc.sendWindowUpdate(nil, n) // conn-level + if st.state != stateHalfClosedRemote && st.state != stateClosed { + // Don't send this WINDOW_UPDATE if the stream is closed + // remotely. + sc.sendWindowUpdate(st, n) + } +} + +// st may be nil for conn-level +func (sc *serverConn) sendWindowUpdate(st *stream, n int) { + sc.serveG.check() + // "The legal range for the increment to the flow control + // window is 1 to 2^31-1 (2,147,483,647) octets." + // A Go Read call on 64-bit machines could in theory read + // a larger Read than this. Very unlikely, but we handle it here + // rather than elsewhere for now. + const maxUint31 = 1<<31 - 1 + for n >= maxUint31 { + sc.sendWindowUpdate32(st, maxUint31) + n -= maxUint31 + } + sc.sendWindowUpdate32(st, int32(n)) +} + +// st may be nil for conn-level +func (sc *serverConn) sendWindowUpdate32(st *stream, n int32) { + sc.serveG.check() + if n == 0 { + return + } + if n < 0 { + panic("negative update") + } + var streamID uint32 + if st != nil { + streamID = st.id + } + sc.writeFrame(FrameWriteRequest{ + write: writeWindowUpdate{streamID: streamID, n: uint32(n)}, + stream: st, + }) + var ok bool + if st == nil { + ok = sc.inflow.add(n) + } else { + ok = st.inflow.add(n) + } + if !ok { + panic("internal error; sent too many window updates without decrements?") + } +} + +// requestBody is the Handler's Request.Body type. +// Read and Close may be called concurrently. +type requestBody struct { + stream *stream + conn *serverConn + closed bool // for use by Close only + sawEOF bool // for use by Read only + pipe *pipe // non-nil if we have a HTTP entity message body + needsContinue bool // need to send a 100-continue +} + +func (b *requestBody) Close() error { + if b.pipe != nil && !b.closed { + b.pipe.BreakWithError(errClosedBody) + } + b.closed = true + return nil +} + +func (b *requestBody) Read(p []byte) (n int, err error) { + if b.needsContinue { + b.needsContinue = false + b.conn.write100ContinueHeaders(b.stream) + } + if b.pipe == nil || b.sawEOF { + return 0, io.EOF + } + n, err = b.pipe.Read(p) + if err == io.EOF { + b.sawEOF = true + } + if b.conn == nil && inTests { + return + } + b.conn.noteBodyReadFromHandler(b.stream, n, err) + return +} + +// responseWriter is the http.ResponseWriter implementation. It's +// intentionally small (1 pointer wide) to minimize garbage. The +// responseWriterState pointer inside is zeroed at the end of a +// request (in handlerDone) and calls on the responseWriter thereafter +// simply crash (caller's mistake), but the much larger responseWriterState +// and buffers are reused between multiple requests. +type responseWriter struct { + rws *responseWriterState +} + +// Optional http.ResponseWriter interfaces implemented. +var ( + _ http.CloseNotifier = (*responseWriter)(nil) + _ http.Flusher = (*responseWriter)(nil) + _ stringWriter = (*responseWriter)(nil) +) + +type responseWriterState struct { + // immutable within a request: + stream *stream + req *http.Request + body *requestBody // to close at end of request, if DATA frames didn't + conn *serverConn + + // TODO: adjust buffer writing sizes based on server config, frame size updates from peer, etc + bw *bufio.Writer // writing to a chunkWriter{this *responseWriterState} + + // mutated by http.Handler goroutine: + handlerHeader http.Header // nil until called + snapHeader http.Header // snapshot of handlerHeader at WriteHeader time + trailers []string // set in writeChunk + status int // status code passed to WriteHeader + wroteHeader bool // WriteHeader called (explicitly or implicitly). Not necessarily sent to user yet. + sentHeader bool // have we sent the header frame? + handlerDone bool // handler has finished + + sentContentLen int64 // non-zero if handler set a Content-Length header + wroteBytes int64 + + closeNotifierMu sync.Mutex // guards closeNotifierCh + closeNotifierCh chan bool // nil until first used +} + +type chunkWriter struct{ rws *responseWriterState } + +func (cw chunkWriter) Write(p []byte) (n int, err error) { return cw.rws.writeChunk(p) } + +func (rws *responseWriterState) hasTrailers() bool { return len(rws.trailers) != 0 } + +// declareTrailer is called for each Trailer header when the +// response header is written. It notes that a header will need to be +// written in the trailers at the end of the response. +func (rws *responseWriterState) declareTrailer(k string) { + k = http.CanonicalHeaderKey(k) + if !ValidTrailerHeader(k) { + // Forbidden by RFC 2616 14.40. + rws.conn.logf("ignoring invalid trailer %q", k) + return + } + if !strSliceContains(rws.trailers, k) { + rws.trailers = append(rws.trailers, k) + } +} + +// writeChunk writes chunks from the bufio.Writer. But because +// bufio.Writer may bypass its chunking, sometimes p may be +// arbitrarily large. +// +// writeChunk is also responsible (on the first chunk) for sending the +// HEADER response. +func (rws *responseWriterState) writeChunk(p []byte) (n int, err error) { + if !rws.wroteHeader { + rws.writeHeader(200) + } + + isHeadResp := rws.req.Method == "HEAD" + if !rws.sentHeader { + rws.sentHeader = true + var ctype, clen string + if clen = rws.snapHeader.Get("Content-Length"); clen != "" { + rws.snapHeader.Del("Content-Length") + clen64, err := strconv.ParseInt(clen, 10, 64) + if err == nil && clen64 >= 0 { + rws.sentContentLen = clen64 + } else { + clen = "" + } + } + if clen == "" && rws.handlerDone && bodyAllowedForStatus(rws.status) && (len(p) > 0 || !isHeadResp) { + clen = strconv.Itoa(len(p)) + } + _, hasContentType := rws.snapHeader["Content-Type"] + if !hasContentType && bodyAllowedForStatus(rws.status) { + ctype = http.DetectContentType(p) + } + var date string + if _, ok := rws.snapHeader["Date"]; !ok { + // TODO(bradfitz): be faster here, like net/http? measure. + date = time.Now().UTC().Format(http.TimeFormat) + } + + for _, v := range rws.snapHeader["Trailer"] { + foreachHeaderElement(v, rws.declareTrailer) + } + + endStream := (rws.handlerDone && !rws.hasTrailers() && len(p) == 0) || isHeadResp + err = rws.conn.writeHeaders(rws.stream, &writeResHeaders{ + streamID: rws.stream.id, + httpResCode: rws.status, + h: rws.snapHeader, + endStream: endStream, + contentType: ctype, + contentLength: clen, + date: date, + }) + if err != nil { + return 0, err + } + if endStream { + return 0, nil + } + } + if isHeadResp { + return len(p), nil + } + if len(p) == 0 && !rws.handlerDone { + return 0, nil + } + + if rws.handlerDone { + rws.promoteUndeclaredTrailers() + } + + endStream := rws.handlerDone && !rws.hasTrailers() + if len(p) > 0 || endStream { + // only send a 0 byte DATA frame if we're ending the stream. + if err := rws.conn.writeDataFromHandler(rws.stream, p, endStream); err != nil { + return 0, err + } + } + + if rws.handlerDone && rws.hasTrailers() { + err = rws.conn.writeHeaders(rws.stream, &writeResHeaders{ + streamID: rws.stream.id, + h: rws.handlerHeader, + trailers: rws.trailers, + endStream: true, + }) + return len(p), err + } + return len(p), nil +} + +// TrailerPrefix is a magic prefix for ResponseWriter.Header map keys +// that, if present, signals that the map entry is actually for +// the response trailers, and not the response headers. The prefix +// is stripped after the ServeHTTP call finishes and the values are +// sent in the trailers. +// +// This mechanism is intended only for trailers that are not known +// prior to the headers being written. If the set of trailers is fixed +// or known before the header is written, the normal Go trailers mechanism +// is preferred: +// https://golang.org/pkg/net/http/#ResponseWriter +// https://golang.org/pkg/net/http/#example_ResponseWriter_trailers +const TrailerPrefix = "Trailer:" + +// promoteUndeclaredTrailers permits http.Handlers to set trailers +// after the header has already been flushed. Because the Go +// ResponseWriter interface has no way to set Trailers (only the +// Header), and because we didn't want to expand the ResponseWriter +// interface, and because nobody used trailers, and because RFC 2616 +// says you SHOULD (but not must) predeclare any trailers in the +// header, the official ResponseWriter rules said trailers in Go must +// be predeclared, and then we reuse the same ResponseWriter.Header() +// map to mean both Headers and Trailers. When it's time to write the +// Trailers, we pick out the fields of Headers that were declared as +// trailers. That worked for a while, until we found the first major +// user of Trailers in the wild: gRPC (using them only over http2), +// and gRPC libraries permit setting trailers mid-stream without +// predeclarnig them. So: change of plans. We still permit the old +// way, but we also permit this hack: if a Header() key begins with +// "Trailer:", the suffix of that key is a Trailer. Because ':' is an +// invalid token byte anyway, there is no ambiguity. (And it's already +// filtered out) It's mildly hacky, but not terrible. +// +// This method runs after the Handler is done and promotes any Header +// fields to be trailers. +func (rws *responseWriterState) promoteUndeclaredTrailers() { + for k, vv := range rws.handlerHeader { + if !strings.HasPrefix(k, TrailerPrefix) { + continue + } + trailerKey := strings.TrimPrefix(k, TrailerPrefix) + rws.declareTrailer(trailerKey) + rws.handlerHeader[http.CanonicalHeaderKey(trailerKey)] = vv + } + + if len(rws.trailers) > 1 { + sorter := sorterPool.Get().(*sorter) + sorter.SortStrings(rws.trailers) + sorterPool.Put(sorter) + } +} + +func (w *responseWriter) Flush() { + rws := w.rws + if rws == nil { + panic("Header called after Handler finished") + } + if rws.bw.Buffered() > 0 { + if err := rws.bw.Flush(); err != nil { + // Ignore the error. The frame writer already knows. + return + } + } else { + // The bufio.Writer won't call chunkWriter.Write + // (writeChunk with zero bytes, so we have to do it + // ourselves to force the HTTP response header and/or + // final DATA frame (with END_STREAM) to be sent. + rws.writeChunk(nil) + } +} + +func (w *responseWriter) CloseNotify() <-chan bool { + rws := w.rws + if rws == nil { + panic("CloseNotify called after Handler finished") + } + rws.closeNotifierMu.Lock() + ch := rws.closeNotifierCh + if ch == nil { + ch = make(chan bool, 1) + rws.closeNotifierCh = ch + cw := rws.stream.cw + go func() { + cw.Wait() // wait for close + ch <- true + }() + } + rws.closeNotifierMu.Unlock() + return ch +} + +func (w *responseWriter) Header() http.Header { + rws := w.rws + if rws == nil { + panic("Header called after Handler finished") + } + if rws.handlerHeader == nil { + rws.handlerHeader = make(http.Header) + } + return rws.handlerHeader +} + +func (w *responseWriter) WriteHeader(code int) { + rws := w.rws + if rws == nil { + panic("WriteHeader called after Handler finished") + } + rws.writeHeader(code) +} + +func (rws *responseWriterState) writeHeader(code int) { + if !rws.wroteHeader { + rws.wroteHeader = true + rws.status = code + if len(rws.handlerHeader) > 0 { + rws.snapHeader = cloneHeader(rws.handlerHeader) + } + } +} + +func cloneHeader(h http.Header) http.Header { + h2 := make(http.Header, len(h)) + for k, vv := range h { + vv2 := make([]string, len(vv)) + copy(vv2, vv) + h2[k] = vv2 + } + return h2 +} + +// The Life Of A Write is like this: +// +// * Handler calls w.Write or w.WriteString -> +// * -> rws.bw (*bufio.Writer) -> +// * (Handler migth call Flush) +// * -> chunkWriter{rws} +// * -> responseWriterState.writeChunk(p []byte) +// * -> responseWriterState.writeChunk (most of the magic; see comment there) +func (w *responseWriter) Write(p []byte) (n int, err error) { + return w.write(len(p), p, "") +} + +func (w *responseWriter) WriteString(s string) (n int, err error) { + return w.write(len(s), nil, s) +} + +// either dataB or dataS is non-zero. +func (w *responseWriter) write(lenData int, dataB []byte, dataS string) (n int, err error) { + rws := w.rws + if rws == nil { + panic("Write called after Handler finished") + } + if !rws.wroteHeader { + w.WriteHeader(200) + } + if !bodyAllowedForStatus(rws.status) { + return 0, http.ErrBodyNotAllowed + } + rws.wroteBytes += int64(len(dataB)) + int64(len(dataS)) // only one can be set + if rws.sentContentLen != 0 && rws.wroteBytes > rws.sentContentLen { + // TODO: send a RST_STREAM + return 0, errors.New("http2: handler wrote more than declared Content-Length") + } + + if dataB != nil { + return rws.bw.Write(dataB) + } else { + return rws.bw.WriteString(dataS) + } +} + +func (w *responseWriter) handlerDone() { + rws := w.rws + rws.handlerDone = true + w.Flush() + w.rws = nil + responseWriterStatePool.Put(rws) +} + +// Push errors. +var ( + ErrRecursivePush = errors.New("http2: recursive push not allowed") + ErrPushLimitReached = errors.New("http2: push would exceed peer's SETTINGS_MAX_CONCURRENT_STREAMS") +) + +// pushOptions is the internal version of http.PushOptions, which we +// cannot include here because it's only defined in Go 1.8 and later. +type pushOptions struct { + Method string + Header http.Header +} + +func (w *responseWriter) push(target string, opts pushOptions) error { + st := w.rws.stream + sc := st.sc + sc.serveG.checkNotOn() + + // No recursive pushes: "PUSH_PROMISE frames MUST only be sent on a peer-initiated stream." + // http://tools.ietf.org/html/rfc7540#section-6.6 + if st.isPushed() { + return ErrRecursivePush + } + + // Default options. + if opts.Method == "" { + opts.Method = "GET" + } + if opts.Header == nil { + opts.Header = http.Header{} + } + wantScheme := "http" + if w.rws.req.TLS != nil { + wantScheme = "https" + } + + // Validate the request. + u, err := url.Parse(target) + if err != nil { + return err + } + if u.Scheme == "" { + if !strings.HasPrefix(target, "/") { + return fmt.Errorf("target must be an absolute URL or an absolute path: %q", target) + } + u.Scheme = wantScheme + u.Host = w.rws.req.Host + } else { + if u.Scheme != wantScheme { + return fmt.Errorf("cannot push URL with scheme %q from request with scheme %q", u.Scheme, wantScheme) + } + if u.Host == "" { + return errors.New("URL must have a host") + } + } + for k := range opts.Header { + if strings.HasPrefix(k, ":") { + return fmt.Errorf("promised request headers cannot include pseudo header %q", k) + } + // These headers are meaningful only if the request has a body, + // but PUSH_PROMISE requests cannot have a body. + // http://tools.ietf.org/html/rfc7540#section-8.2 + // Also disallow Host, since the promised URL must be absolute. + switch strings.ToLower(k) { + case "content-length", "content-encoding", "trailer", "te", "expect", "host": + return fmt.Errorf("promised request headers cannot include %q", k) + } + } + if err := checkValidHTTP2RequestHeaders(opts.Header); err != nil { + return err + } + + // The RFC effectively limits promised requests to GET and HEAD: + // "Promised requests MUST be cacheable [GET, HEAD, or POST], and MUST be safe [GET or HEAD]" + // http://tools.ietf.org/html/rfc7540#section-8.2 + if opts.Method != "GET" && opts.Method != "HEAD" { + return fmt.Errorf("method %q must be GET or HEAD", opts.Method) + } + + msg := startPushRequest{ + parent: st, + method: opts.Method, + url: u, + header: cloneHeader(opts.Header), + done: errChanPool.Get().(chan error), + } + + select { + case <-sc.doneServing: + return errClientDisconnected + case <-st.cw: + return errStreamClosed + case sc.wantStartPushCh <- msg: + } + + select { + case <-sc.doneServing: + return errClientDisconnected + case <-st.cw: + return errStreamClosed + case err := <-msg.done: + errChanPool.Put(msg.done) + return err + } +} + +type startPushRequest struct { + parent *stream + method string + url *url.URL + header http.Header + done chan error +} + +func (sc *serverConn) startPush(msg startPushRequest) { + sc.serveG.check() + + // http://tools.ietf.org/html/rfc7540#section-6.6. + // PUSH_PROMISE frames MUST only be sent on a peer-initiated stream that + // is in either the "open" or "half-closed (remote)" state. + if msg.parent.state != stateOpen && msg.parent.state != stateHalfClosedRemote { + // responseWriter.Push checks that the stream is peer-initiaed. + msg.done <- errStreamClosed + return + } + + // http://tools.ietf.org/html/rfc7540#section-6.6. + if !sc.pushEnabled { + msg.done <- http.ErrNotSupported + return + } + + // PUSH_PROMISE frames must be sent in increasing order by stream ID, so + // we allocate an ID for the promised stream lazily, when the PUSH_PROMISE + // is written. Once the ID is allocated, we start the request handler. + allocatePromisedID := func() (uint32, error) { + sc.serveG.check() + + // Check this again, just in case. Technically, we might have received + // an updated SETTINGS by the time we got around to writing this frame. + if !sc.pushEnabled { + return 0, http.ErrNotSupported + } + // http://tools.ietf.org/html/rfc7540#section-6.5.2. + if sc.curPushedStreams+1 > sc.clientMaxStreams { + return 0, ErrPushLimitReached + } + + // http://tools.ietf.org/html/rfc7540#section-5.1.1. + // Streams initiated by the server MUST use even-numbered identifiers. + // A server that is unable to establish a new stream identifier can send a GOAWAY + // frame so that the client is forced to open a new connection for new streams. + if sc.maxPushPromiseID+2 >= 1<<31 { + sc.startGracefulShutdown() + return 0, ErrPushLimitReached + } + sc.maxPushPromiseID += 2 + promisedID := sc.maxPushPromiseID + + // http://tools.ietf.org/html/rfc7540#section-8.2. + // Strictly speaking, the new stream should start in "reserved (local)", then + // transition to "half closed (remote)" after sending the initial HEADERS, but + // we start in "half closed (remote)" for simplicity. + // See further comments at the definition of stateHalfClosedRemote. + promised := sc.newStream(promisedID, msg.parent.id, stateHalfClosedRemote) + rw, req, err := sc.newWriterAndRequestNoBody(promised, requestParam{ + method: msg.method, + scheme: msg.url.Scheme, + authority: msg.url.Host, + path: msg.url.RequestURI(), + header: cloneHeader(msg.header), // clone since handler runs concurrently with writing the PUSH_PROMISE + }) + if err != nil { + // Should not happen, since we've already validated msg.url. + panic(fmt.Sprintf("newWriterAndRequestNoBody(%+v): %v", msg.url, err)) + } + + go sc.runHandler(rw, req, sc.handler.ServeHTTP) + return promisedID, nil + } + + sc.writeFrame(FrameWriteRequest{ + write: &writePushPromise{ + streamID: msg.parent.id, + method: msg.method, + url: msg.url, + h: msg.header, + allocatePromisedID: allocatePromisedID, + }, + stream: msg.parent, + done: msg.done, + }) +} + +// foreachHeaderElement splits v according to the "#rule" construction +// in RFC 2616 section 2.1 and calls fn for each non-empty element. +func foreachHeaderElement(v string, fn func(string)) { + v = textproto.TrimString(v) + if v == "" { + return + } + if !strings.Contains(v, ",") { + fn(v) + return + } + for _, f := range strings.Split(v, ",") { + if f = textproto.TrimString(f); f != "" { + fn(f) + } + } +} + +// From http://httpwg.org/specs/rfc7540.html#rfc.section.8.1.2.2 +var connHeaders = []string{ + "Connection", + "Keep-Alive", + "Proxy-Connection", + "Transfer-Encoding", + "Upgrade", +} + +// checkValidHTTP2RequestHeaders checks whether h is a valid HTTP/2 request, +// per RFC 7540 Section 8.1.2.2. +// The returned error is reported to users. +func checkValidHTTP2RequestHeaders(h http.Header) error { + for _, k := range connHeaders { + if _, ok := h[k]; ok { + return fmt.Errorf("request header %q is not valid in HTTP/2", k) + } + } + te := h["Te"] + if len(te) > 0 && (len(te) > 1 || (te[0] != "trailers" && te[0] != "")) { + return errors.New(`request header "TE" may only be "trailers" in HTTP/2`) + } + return nil +} + +func new400Handler(err error) http.HandlerFunc { + return func(w http.ResponseWriter, r *http.Request) { + http.Error(w, err.Error(), http.StatusBadRequest) + } +} + +// ValidTrailerHeader reports whether name is a valid header field name to appear +// in trailers. +// See: http://tools.ietf.org/html/rfc7230#section-4.1.2 +func ValidTrailerHeader(name string) bool { + name = http.CanonicalHeaderKey(name) + if strings.HasPrefix(name, "If-") || badTrailer[name] { + return false + } + return true +} + +var badTrailer = map[string]bool{ + "Authorization": true, + "Cache-Control": true, + "Connection": true, + "Content-Encoding": true, + "Content-Length": true, + "Content-Range": true, + "Content-Type": true, + "Expect": true, + "Host": true, + "Keep-Alive": true, + "Max-Forwards": true, + "Pragma": true, + "Proxy-Authenticate": true, + "Proxy-Authorization": true, + "Proxy-Connection": true, + "Range": true, + "Realm": true, + "Te": true, + "Trailer": true, + "Transfer-Encoding": true, + "Www-Authenticate": true, +} + +// h1ServerShutdownChan returns a channel that will be closed when the +// provided *http.Server wants to shut down. +// +// This is a somewhat hacky way to get at http1 innards. It works +// when the http2 code is bundled into the net/http package in the +// standard library. The alternatives ended up making the cmd/go tool +// depend on http Servers. This is the lightest option for now. +// This is tested via the TestServeShutdown* tests in net/http. +func h1ServerShutdownChan(hs *http.Server) <-chan struct{} { + if fn := testh1ServerShutdownChan; fn != nil { + return fn(hs) + } + var x interface{} = hs + type I interface { + getDoneChan() <-chan struct{} + } + if hs, ok := x.(I); ok { + return hs.getDoneChan() + } + return nil +} + +// optional test hook for h1ServerShutdownChan. +var testh1ServerShutdownChan func(hs *http.Server) <-chan struct{} + +// h1ServerKeepAlivesDisabled reports whether hs has its keep-alives +// disabled. See comments on h1ServerShutdownChan above for why +// the code is written this way. +func h1ServerKeepAlivesDisabled(hs *http.Server) bool { + var x interface{} = hs + type I interface { + doKeepAlives() bool + } + if hs, ok := x.(I); ok { + return !hs.doKeepAlives() + } + return false +} diff --git a/vendor/golang.org/x/net/http2/server_push_test.go b/vendor/golang.org/x/net/http2/server_push_test.go new file mode 100644 index 0000000..f70edd3 --- /dev/null +++ b/vendor/golang.org/x/net/http2/server_push_test.go @@ -0,0 +1,521 @@ +// Copyright 2016 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +// +build go1.8 + +package http2 + +import ( + "errors" + "fmt" + "io" + "io/ioutil" + "net/http" + "reflect" + "strconv" + "sync" + "testing" + "time" +) + +func TestServer_Push_Success(t *testing.T) { + const ( + mainBody = "index page" + pushedBody = "pushed page" + userAgent = "testagent" + cookie = "testcookie" + ) + + var stURL string + checkPromisedReq := func(r *http.Request, wantMethod string, wantH http.Header) error { + if got, want := r.Method, wantMethod; got != want { + return fmt.Errorf("promised Req.Method=%q, want %q", got, want) + } + if got, want := r.Header, wantH; !reflect.DeepEqual(got, want) { + return fmt.Errorf("promised Req.Header=%q, want %q", got, want) + } + if got, want := "https://"+r.Host, stURL; got != want { + return fmt.Errorf("promised Req.Host=%q, want %q", got, want) + } + if r.Body == nil { + return fmt.Errorf("nil Body") + } + if buf, err := ioutil.ReadAll(r.Body); err != nil || len(buf) != 0 { + return fmt.Errorf("ReadAll(Body)=%q,%v, want '',nil", buf, err) + } + return nil + } + + errc := make(chan error, 3) + st := newServerTester(t, func(w http.ResponseWriter, r *http.Request) { + switch r.URL.RequestURI() { + case "/": + // Push "/pushed?get" as a GET request, using an absolute URL. + opt := &http.PushOptions{ + Header: http.Header{ + "User-Agent": {userAgent}, + }, + } + if err := w.(http.Pusher).Push(stURL+"/pushed?get", opt); err != nil { + errc <- fmt.Errorf("error pushing /pushed?get: %v", err) + return + } + // Push "/pushed?head" as a HEAD request, using a path. + opt = &http.PushOptions{ + Method: "HEAD", + Header: http.Header{ + "User-Agent": {userAgent}, + "Cookie": {cookie}, + }, + } + if err := w.(http.Pusher).Push("/pushed?head", opt); err != nil { + errc <- fmt.Errorf("error pushing /pushed?head: %v", err) + return + } + w.Header().Set("Content-Type", "text/html") + w.Header().Set("Content-Length", strconv.Itoa(len(mainBody))) + w.WriteHeader(200) + io.WriteString(w, mainBody) + errc <- nil + + case "/pushed?get": + wantH := http.Header{} + wantH.Set("User-Agent", userAgent) + if err := checkPromisedReq(r, "GET", wantH); err != nil { + errc <- fmt.Errorf("/pushed?get: %v", err) + return + } + w.Header().Set("Content-Type", "text/html") + w.Header().Set("Content-Length", strconv.Itoa(len(pushedBody))) + w.WriteHeader(200) + io.WriteString(w, pushedBody) + errc <- nil + + case "/pushed?head": + wantH := http.Header{} + wantH.Set("User-Agent", userAgent) + wantH.Set("Cookie", cookie) + if err := checkPromisedReq(r, "HEAD", wantH); err != nil { + errc <- fmt.Errorf("/pushed?head: %v", err) + return + } + w.WriteHeader(204) + errc <- nil + + default: + errc <- fmt.Errorf("unknown RequestURL %q", r.URL.RequestURI()) + } + }) + stURL = st.ts.URL + + // Send one request, which should push two responses. + st.greet() + getSlash(st) + for k := 0; k < 3; k++ { + select { + case <-time.After(2 * time.Second): + t.Errorf("timeout waiting for handler %d to finish", k) + case err := <-errc: + if err != nil { + t.Fatal(err) + } + } + } + + checkPushPromise := func(f Frame, promiseID uint32, wantH [][2]string) error { + pp, ok := f.(*PushPromiseFrame) + if !ok { + return fmt.Errorf("got a %T; want *PushPromiseFrame", f) + } + if !pp.HeadersEnded() { + return fmt.Errorf("want END_HEADERS flag in PushPromiseFrame") + } + if got, want := pp.PromiseID, promiseID; got != want { + return fmt.Errorf("got PromiseID %v; want %v", got, want) + } + gotH := st.decodeHeader(pp.HeaderBlockFragment()) + if !reflect.DeepEqual(gotH, wantH) { + return fmt.Errorf("got promised headers %v; want %v", gotH, wantH) + } + return nil + } + checkHeaders := func(f Frame, wantH [][2]string) error { + hf, ok := f.(*HeadersFrame) + if !ok { + return fmt.Errorf("got a %T; want *HeadersFrame", f) + } + gotH := st.decodeHeader(hf.HeaderBlockFragment()) + if !reflect.DeepEqual(gotH, wantH) { + return fmt.Errorf("got response headers %v; want %v", gotH, wantH) + } + return nil + } + checkData := func(f Frame, wantData string) error { + df, ok := f.(*DataFrame) + if !ok { + return fmt.Errorf("got a %T; want *DataFrame", f) + } + if gotData := string(df.Data()); gotData != wantData { + return fmt.Errorf("got response data %q; want %q", gotData, wantData) + } + return nil + } + + // Stream 1 has 2 PUSH_PROMISE + HEADERS + DATA + // Stream 2 has HEADERS + DATA + // Stream 4 has HEADERS + expected := map[uint32][]func(Frame) error{ + 1: { + func(f Frame) error { + return checkPushPromise(f, 2, [][2]string{ + {":method", "GET"}, + {":scheme", "https"}, + {":authority", st.ts.Listener.Addr().String()}, + {":path", "/pushed?get"}, + {"user-agent", userAgent}, + }) + }, + func(f Frame) error { + return checkPushPromise(f, 4, [][2]string{ + {":method", "HEAD"}, + {":scheme", "https"}, + {":authority", st.ts.Listener.Addr().String()}, + {":path", "/pushed?head"}, + {"cookie", cookie}, + {"user-agent", userAgent}, + }) + }, + func(f Frame) error { + return checkHeaders(f, [][2]string{ + {":status", "200"}, + {"content-type", "text/html"}, + {"content-length", strconv.Itoa(len(mainBody))}, + }) + }, + func(f Frame) error { + return checkData(f, mainBody) + }, + }, + 2: { + func(f Frame) error { + return checkHeaders(f, [][2]string{ + {":status", "200"}, + {"content-type", "text/html"}, + {"content-length", strconv.Itoa(len(pushedBody))}, + }) + }, + func(f Frame) error { + return checkData(f, pushedBody) + }, + }, + 4: { + func(f Frame) error { + return checkHeaders(f, [][2]string{ + {":status", "204"}, + }) + }, + }, + } + + consumed := map[uint32]int{} + for k := 0; len(expected) > 0; k++ { + f, err := st.readFrame() + if err != nil { + for id, left := range expected { + t.Errorf("stream %d: missing %d frames", id, len(left)) + } + t.Fatalf("readFrame %d: %v", k, err) + } + id := f.Header().StreamID + label := fmt.Sprintf("stream %d, frame %d", id, consumed[id]) + if len(expected[id]) == 0 { + t.Fatalf("%s: unexpected frame %#+v", label, f) + } + check := expected[id][0] + expected[id] = expected[id][1:] + if len(expected[id]) == 0 { + delete(expected, id) + } + if err := check(f); err != nil { + t.Fatalf("%s: %v", label, err) + } + consumed[id]++ + } +} + +func TestServer_Push_SuccessNoRace(t *testing.T) { + // Regression test for issue #18326. Ensure the request handler can mutate + // pushed request headers without racing with the PUSH_PROMISE write. + errc := make(chan error, 2) + st := newServerTester(t, func(w http.ResponseWriter, r *http.Request) { + switch r.URL.RequestURI() { + case "/": + opt := &http.PushOptions{ + Header: http.Header{"User-Agent": {"testagent"}}, + } + if err := w.(http.Pusher).Push("/pushed", opt); err != nil { + errc <- fmt.Errorf("error pushing: %v", err) + return + } + w.WriteHeader(200) + errc <- nil + + case "/pushed": + // Update request header, ensure there is no race. + r.Header.Set("User-Agent", "newagent") + r.Header.Set("Cookie", "cookie") + w.WriteHeader(200) + errc <- nil + + default: + errc <- fmt.Errorf("unknown RequestURL %q", r.URL.RequestURI()) + } + }) + + // Send one request, which should push one response. + st.greet() + getSlash(st) + for k := 0; k < 2; k++ { + select { + case <-time.After(2 * time.Second): + t.Errorf("timeout waiting for handler %d to finish", k) + case err := <-errc: + if err != nil { + t.Fatal(err) + } + } + } +} + +func TestServer_Push_RejectRecursivePush(t *testing.T) { + // Expect two requests, but might get three if there's a bug and the second push succeeds. + errc := make(chan error, 3) + handler := func(w http.ResponseWriter, r *http.Request) error { + baseURL := "https://" + r.Host + switch r.URL.Path { + case "/": + if err := w.(http.Pusher).Push(baseURL+"/push1", nil); err != nil { + return fmt.Errorf("first Push()=%v, want nil", err) + } + return nil + + case "/push1": + if got, want := w.(http.Pusher).Push(baseURL+"/push2", nil), ErrRecursivePush; got != want { + return fmt.Errorf("Push()=%v, want %v", got, want) + } + return nil + + default: + return fmt.Errorf("unexpected path: %q", r.URL.Path) + } + } + st := newServerTester(t, func(w http.ResponseWriter, r *http.Request) { + errc <- handler(w, r) + }) + defer st.Close() + st.greet() + getSlash(st) + if err := <-errc; err != nil { + t.Errorf("First request failed: %v", err) + } + if err := <-errc; err != nil { + t.Errorf("Second request failed: %v", err) + } +} + +func testServer_Push_RejectSingleRequest(t *testing.T, doPush func(http.Pusher, *http.Request) error, settings ...Setting) { + // Expect one request, but might get two if there's a bug and the push succeeds. + errc := make(chan error, 2) + st := newServerTester(t, func(w http.ResponseWriter, r *http.Request) { + errc <- doPush(w.(http.Pusher), r) + }) + defer st.Close() + st.greet() + if err := st.fr.WriteSettings(settings...); err != nil { + st.t.Fatalf("WriteSettings: %v", err) + } + st.wantSettingsAck() + getSlash(st) + if err := <-errc; err != nil { + t.Error(err) + } + // Should not get a PUSH_PROMISE frame. + hf := st.wantHeaders() + if !hf.StreamEnded() { + t.Error("stream should end after headers") + } +} + +func TestServer_Push_RejectIfDisabled(t *testing.T) { + testServer_Push_RejectSingleRequest(t, + func(p http.Pusher, r *http.Request) error { + if got, want := p.Push("https://"+r.Host+"/pushed", nil), http.ErrNotSupported; got != want { + return fmt.Errorf("Push()=%v, want %v", got, want) + } + return nil + }, + Setting{SettingEnablePush, 0}) +} + +func TestServer_Push_RejectWhenNoConcurrentStreams(t *testing.T) { + testServer_Push_RejectSingleRequest(t, + func(p http.Pusher, r *http.Request) error { + if got, want := p.Push("https://"+r.Host+"/pushed", nil), ErrPushLimitReached; got != want { + return fmt.Errorf("Push()=%v, want %v", got, want) + } + return nil + }, + Setting{SettingMaxConcurrentStreams, 0}) +} + +func TestServer_Push_RejectWrongScheme(t *testing.T) { + testServer_Push_RejectSingleRequest(t, + func(p http.Pusher, r *http.Request) error { + if err := p.Push("http://"+r.Host+"/pushed", nil); err == nil { + return errors.New("Push() should have failed (push target URL is http)") + } + return nil + }) +} + +func TestServer_Push_RejectMissingHost(t *testing.T) { + testServer_Push_RejectSingleRequest(t, + func(p http.Pusher, r *http.Request) error { + if err := p.Push("https:pushed", nil); err == nil { + return errors.New("Push() should have failed (push target URL missing host)") + } + return nil + }) +} + +func TestServer_Push_RejectRelativePath(t *testing.T) { + testServer_Push_RejectSingleRequest(t, + func(p http.Pusher, r *http.Request) error { + if err := p.Push("../test", nil); err == nil { + return errors.New("Push() should have failed (push target is a relative path)") + } + return nil + }) +} + +func TestServer_Push_RejectForbiddenMethod(t *testing.T) { + testServer_Push_RejectSingleRequest(t, + func(p http.Pusher, r *http.Request) error { + if err := p.Push("https://"+r.Host+"/pushed", &http.PushOptions{Method: "POST"}); err == nil { + return errors.New("Push() should have failed (cannot promise a POST)") + } + return nil + }) +} + +func TestServer_Push_RejectForbiddenHeader(t *testing.T) { + testServer_Push_RejectSingleRequest(t, + func(p http.Pusher, r *http.Request) error { + header := http.Header{ + "Content-Length": {"10"}, + "Content-Encoding": {"gzip"}, + "Trailer": {"Foo"}, + "Te": {"trailers"}, + "Host": {"test.com"}, + ":authority": {"test.com"}, + } + if err := p.Push("https://"+r.Host+"/pushed", &http.PushOptions{Header: header}); err == nil { + return errors.New("Push() should have failed (forbidden headers)") + } + return nil + }) +} + +func TestServer_Push_StateTransitions(t *testing.T) { + const body = "foo" + + gotPromise := make(chan bool) + finishedPush := make(chan bool) + + st := newServerTester(t, func(w http.ResponseWriter, r *http.Request) { + switch r.URL.RequestURI() { + case "/": + if err := w.(http.Pusher).Push("/pushed", nil); err != nil { + t.Errorf("Push error: %v", err) + } + // Don't finish this request until the push finishes so we don't + // nondeterministically interleave output frames with the push. + <-finishedPush + case "/pushed": + <-gotPromise + } + w.Header().Set("Content-Type", "text/html") + w.Header().Set("Content-Length", strconv.Itoa(len(body))) + w.WriteHeader(200) + io.WriteString(w, body) + }) + defer st.Close() + + st.greet() + if st.stream(2) != nil { + t.Fatal("stream 2 should be empty") + } + if got, want := st.streamState(2), stateIdle; got != want { + t.Fatalf("streamState(2)=%v, want %v", got, want) + } + getSlash(st) + // After the PUSH_PROMISE is sent, the stream should be stateHalfClosedRemote. + st.wantPushPromise() + if got, want := st.streamState(2), stateHalfClosedRemote; got != want { + t.Fatalf("streamState(2)=%v, want %v", got, want) + } + // We stall the HTTP handler for "/pushed" until the above check. If we don't + // stall the handler, then the handler might write HEADERS and DATA and finish + // the stream before we check st.streamState(2) -- should that happen, we'll + // see stateClosed and fail the above check. + close(gotPromise) + st.wantHeaders() + if df := st.wantData(); !df.StreamEnded() { + t.Fatal("expected END_STREAM flag on DATA") + } + if got, want := st.streamState(2), stateClosed; got != want { + t.Fatalf("streamState(2)=%v, want %v", got, want) + } + close(finishedPush) +} + +func TestServer_Push_RejectAfterGoAway(t *testing.T) { + var readyOnce sync.Once + ready := make(chan struct{}) + errc := make(chan error, 2) + st := newServerTester(t, func(w http.ResponseWriter, r *http.Request) { + select { + case <-ready: + case <-time.After(5 * time.Second): + errc <- fmt.Errorf("timeout waiting for GOAWAY to be processed") + } + if got, want := w.(http.Pusher).Push("https://"+r.Host+"/pushed", nil), http.ErrNotSupported; got != want { + errc <- fmt.Errorf("Push()=%v, want %v", got, want) + } + errc <- nil + }) + defer st.Close() + st.greet() + getSlash(st) + + // Send GOAWAY and wait for it to be processed. + st.fr.WriteGoAway(1, ErrCodeNo, nil) + go func() { + for { + select { + case <-ready: + return + default: + } + st.sc.testHookCh <- func(loopNum int) { + if !st.sc.pushEnabled { + readyOnce.Do(func() { close(ready) }) + } + } + } + }() + if err := <-errc; err != nil { + t.Error(err) + } +} diff --git a/vendor/golang.org/x/net/http2/transport.go b/vendor/golang.org/x/net/http2/transport.go new file mode 100644 index 0000000..0c7e859 --- /dev/null +++ b/vendor/golang.org/x/net/http2/transport.go @@ -0,0 +1,2129 @@ +// Copyright 2015 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +// Transport code. + +package http2 + +import ( + "bufio" + "bytes" + "compress/gzip" + "crypto/rand" + "crypto/tls" + "errors" + "fmt" + "io" + "io/ioutil" + "log" + "math" + "net" + "net/http" + "sort" + "strconv" + "strings" + "sync" + "time" + + "golang.org/x/net/http2/hpack" + "golang.org/x/net/idna" + "golang.org/x/net/lex/httplex" +) + +const ( + // transportDefaultConnFlow is how many connection-level flow control + // tokens we give the server at start-up, past the default 64k. + transportDefaultConnFlow = 1 << 30 + + // transportDefaultStreamFlow is how many stream-level flow + // control tokens we announce to the peer, and how many bytes + // we buffer per stream. + transportDefaultStreamFlow = 4 << 20 + + // transportDefaultStreamMinRefresh is the minimum number of bytes we'll send + // a stream-level WINDOW_UPDATE for at a time. + transportDefaultStreamMinRefresh = 4 << 10 + + defaultUserAgent = "Go-http-client/2.0" +) + +// Transport is an HTTP/2 Transport. +// +// A Transport internally caches connections to servers. It is safe +// for concurrent use by multiple goroutines. +type Transport struct { + // DialTLS specifies an optional dial function for creating + // TLS connections for requests. + // + // If DialTLS is nil, tls.Dial is used. + // + // If the returned net.Conn has a ConnectionState method like tls.Conn, + // it will be used to set http.Response.TLS. + DialTLS func(network, addr string, cfg *tls.Config) (net.Conn, error) + + // TLSClientConfig specifies the TLS configuration to use with + // tls.Client. If nil, the default configuration is used. + TLSClientConfig *tls.Config + + // ConnPool optionally specifies an alternate connection pool to use. + // If nil, the default is used. + ConnPool ClientConnPool + + // DisableCompression, if true, prevents the Transport from + // requesting compression with an "Accept-Encoding: gzip" + // request header when the Request contains no existing + // Accept-Encoding value. If the Transport requests gzip on + // its own and gets a gzipped response, it's transparently + // decoded in the Response.Body. However, if the user + // explicitly requested gzip it is not automatically + // uncompressed. + DisableCompression bool + + // AllowHTTP, if true, permits HTTP/2 requests using the insecure, + // plain-text "http" scheme. Note that this does not enable h2c support. + AllowHTTP bool + + // MaxHeaderListSize is the http2 SETTINGS_MAX_HEADER_LIST_SIZE to + // send in the initial settings frame. It is how many bytes + // of response headers are allow. Unlike the http2 spec, zero here + // means to use a default limit (currently 10MB). If you actually + // want to advertise an ulimited value to the peer, Transport + // interprets the highest possible value here (0xffffffff or 1<<32-1) + // to mean no limit. + MaxHeaderListSize uint32 + + // t1, if non-nil, is the standard library Transport using + // this transport. Its settings are used (but not its + // RoundTrip method, etc). + t1 *http.Transport + + connPoolOnce sync.Once + connPoolOrDef ClientConnPool // non-nil version of ConnPool +} + +func (t *Transport) maxHeaderListSize() uint32 { + if t.MaxHeaderListSize == 0 { + return 10 << 20 + } + if t.MaxHeaderListSize == 0xffffffff { + return 0 + } + return t.MaxHeaderListSize +} + +func (t *Transport) disableCompression() bool { + return t.DisableCompression || (t.t1 != nil && t.t1.DisableCompression) +} + +var errTransportVersion = errors.New("http2: ConfigureTransport is only supported starting at Go 1.6") + +// ConfigureTransport configures a net/http HTTP/1 Transport to use HTTP/2. +// It requires Go 1.6 or later and returns an error if the net/http package is too old +// or if t1 has already been HTTP/2-enabled. +func ConfigureTransport(t1 *http.Transport) error { + _, err := configureTransport(t1) // in configure_transport.go (go1.6) or not_go16.go + return err +} + +func (t *Transport) connPool() ClientConnPool { + t.connPoolOnce.Do(t.initConnPool) + return t.connPoolOrDef +} + +func (t *Transport) initConnPool() { + if t.ConnPool != nil { + t.connPoolOrDef = t.ConnPool + } else { + t.connPoolOrDef = &clientConnPool{t: t} + } +} + +// ClientConn is the state of a single HTTP/2 client connection to an +// HTTP/2 server. +type ClientConn struct { + t *Transport + tconn net.Conn // usually *tls.Conn, except specialized impls + tlsState *tls.ConnectionState // nil only for specialized impls + singleUse bool // whether being used for a single http.Request + + // readLoop goroutine fields: + readerDone chan struct{} // closed on error + readerErr error // set before readerDone is closed + + idleTimeout time.Duration // or 0 for never + idleTimer *time.Timer + + mu sync.Mutex // guards following + cond *sync.Cond // hold mu; broadcast on flow/closed changes + flow flow // our conn-level flow control quota (cs.flow is per stream) + inflow flow // peer's conn-level flow control + closed bool + wantSettingsAck bool // we sent a SETTINGS frame and haven't heard back + goAway *GoAwayFrame // if non-nil, the GoAwayFrame we received + goAwayDebug string // goAway frame's debug data, retained as a string + streams map[uint32]*clientStream // client-initiated + nextStreamID uint32 + pings map[[8]byte]chan struct{} // in flight ping data to notification channel + bw *bufio.Writer + br *bufio.Reader + fr *Framer + lastActive time.Time + // Settings from peer: (also guarded by mu) + maxFrameSize uint32 + maxConcurrentStreams uint32 + initialWindowSize uint32 + + hbuf bytes.Buffer // HPACK encoder writes into this + henc *hpack.Encoder + freeBuf [][]byte + + wmu sync.Mutex // held while writing; acquire AFTER mu if holding both + werr error // first write error that has occurred +} + +// clientStream is the state for a single HTTP/2 stream. One of these +// is created for each Transport.RoundTrip call. +type clientStream struct { + cc *ClientConn + req *http.Request + trace *clientTrace // or nil + ID uint32 + resc chan resAndError + bufPipe pipe // buffered pipe with the flow-controlled response payload + startedWrite bool // started request body write; guarded by cc.mu + requestedGzip bool + on100 func() // optional code to run if get a 100 continue response + + flow flow // guarded by cc.mu + inflow flow // guarded by cc.mu + bytesRemain int64 // -1 means unknown; owned by transportResponseBody.Read + readErr error // sticky read error; owned by transportResponseBody.Read + stopReqBody error // if non-nil, stop writing req body; guarded by cc.mu + didReset bool // whether we sent a RST_STREAM to the server; guarded by cc.mu + + peerReset chan struct{} // closed on peer reset + resetErr error // populated before peerReset is closed + + done chan struct{} // closed when stream remove from cc.streams map; close calls guarded by cc.mu + + // owned by clientConnReadLoop: + firstByte bool // got the first response byte + pastHeaders bool // got first MetaHeadersFrame (actual headers) + pastTrailers bool // got optional second MetaHeadersFrame (trailers) + + trailer http.Header // accumulated trailers + resTrailer *http.Header // client's Response.Trailer +} + +// awaitRequestCancel runs in its own goroutine and waits for the user +// to cancel a RoundTrip request, its context to expire, or for the +// request to be done (any way it might be removed from the cc.streams +// map: peer reset, successful completion, TCP connection breakage, +// etc) +func (cs *clientStream) awaitRequestCancel(req *http.Request) { + ctx := reqContext(req) + if req.Cancel == nil && ctx.Done() == nil { + return + } + select { + case <-req.Cancel: + cs.cancelStream() + cs.bufPipe.CloseWithError(errRequestCanceled) + case <-ctx.Done(): + cs.cancelStream() + cs.bufPipe.CloseWithError(ctx.Err()) + case <-cs.done: + } +} + +func (cs *clientStream) cancelStream() { + cs.cc.mu.Lock() + didReset := cs.didReset + cs.didReset = true + cs.cc.mu.Unlock() + + if !didReset { + cs.cc.writeStreamReset(cs.ID, ErrCodeCancel, nil) + } +} + +// checkResetOrDone reports any error sent in a RST_STREAM frame by the +// server, or errStreamClosed if the stream is complete. +func (cs *clientStream) checkResetOrDone() error { + select { + case <-cs.peerReset: + return cs.resetErr + case <-cs.done: + return errStreamClosed + default: + return nil + } +} + +func (cs *clientStream) abortRequestBodyWrite(err error) { + if err == nil { + panic("nil error") + } + cc := cs.cc + cc.mu.Lock() + cs.stopReqBody = err + cc.cond.Broadcast() + cc.mu.Unlock() +} + +type stickyErrWriter struct { + w io.Writer + err *error +} + +func (sew stickyErrWriter) Write(p []byte) (n int, err error) { + if *sew.err != nil { + return 0, *sew.err + } + n, err = sew.w.Write(p) + *sew.err = err + return +} + +var ErrNoCachedConn = errors.New("http2: no cached connection was available") + +// RoundTripOpt are options for the Transport.RoundTripOpt method. +type RoundTripOpt struct { + // OnlyCachedConn controls whether RoundTripOpt may + // create a new TCP connection. If set true and + // no cached connection is available, RoundTripOpt + // will return ErrNoCachedConn. + OnlyCachedConn bool +} + +func (t *Transport) RoundTrip(req *http.Request) (*http.Response, error) { + return t.RoundTripOpt(req, RoundTripOpt{}) +} + +// authorityAddr returns a given authority (a host/IP, or host:port / ip:port) +// and returns a host:port. The port 443 is added if needed. +func authorityAddr(scheme string, authority string) (addr string) { + host, port, err := net.SplitHostPort(authority) + if err != nil { // authority didn't have a port + port = "443" + if scheme == "http" { + port = "80" + } + host = authority + } + if a, err := idna.ToASCII(host); err == nil { + host = a + } + // IPv6 address literal, without a port: + if strings.HasPrefix(host, "[") && strings.HasSuffix(host, "]") { + return host + ":" + port + } + return net.JoinHostPort(host, port) +} + +// RoundTripOpt is like RoundTrip, but takes options. +func (t *Transport) RoundTripOpt(req *http.Request, opt RoundTripOpt) (*http.Response, error) { + if !(req.URL.Scheme == "https" || (req.URL.Scheme == "http" && t.AllowHTTP)) { + return nil, errors.New("http2: unsupported scheme") + } + + addr := authorityAddr(req.URL.Scheme, req.URL.Host) + for { + cc, err := t.connPool().GetClientConn(req, addr) + if err != nil { + t.vlogf("http2: Transport failed to get client conn for %s: %v", addr, err) + return nil, err + } + traceGotConn(req, cc) + res, err := cc.RoundTrip(req) + if err != nil { + if req, err = shouldRetryRequest(req, err); err == nil { + continue + } + } + if err != nil { + t.vlogf("RoundTrip failure: %v", err) + return nil, err + } + return res, nil + } +} + +// CloseIdleConnections closes any connections which were previously +// connected from previous requests but are now sitting idle. +// It does not interrupt any connections currently in use. +func (t *Transport) CloseIdleConnections() { + if cp, ok := t.connPool().(clientConnPoolIdleCloser); ok { + cp.closeIdleConnections() + } +} + +var ( + errClientConnClosed = errors.New("http2: client conn is closed") + errClientConnUnusable = errors.New("http2: client conn not usable") + + errClientConnGotGoAway = errors.New("http2: Transport received Server's graceful shutdown GOAWAY") + errClientConnGotGoAwayAfterSomeReqBody = errors.New("http2: Transport received Server's graceful shutdown GOAWAY; some request body already written") +) + +// shouldRetryRequest is called by RoundTrip when a request fails to get +// response headers. It is always called with a non-nil error. +// It returns either a request to retry (either the same request, or a +// modified clone), or an error if the request can't be replayed. +func shouldRetryRequest(req *http.Request, err error) (*http.Request, error) { + switch err { + default: + return nil, err + case errClientConnUnusable, errClientConnGotGoAway: + return req, nil + case errClientConnGotGoAwayAfterSomeReqBody: + // If the Body is nil (or http.NoBody), it's safe to reuse + // this request and its Body. + if req.Body == nil || reqBodyIsNoBody(req.Body) { + return req, nil + } + // Otherwise we depend on the Request having its GetBody + // func defined. + getBody := reqGetBody(req) // Go 1.8: getBody = req.GetBody + if getBody == nil { + return nil, errors.New("http2: Transport: peer server initiated graceful shutdown after some of Request.Body was written; define Request.GetBody to avoid this error") + } + body, err := getBody() + if err != nil { + return nil, err + } + newReq := *req + newReq.Body = body + return &newReq, nil + } +} + +func (t *Transport) dialClientConn(addr string, singleUse bool) (*ClientConn, error) { + host, _, err := net.SplitHostPort(addr) + if err != nil { + return nil, err + } + tconn, err := t.dialTLS()("tcp", addr, t.newTLSConfig(host)) + if err != nil { + return nil, err + } + return t.newClientConn(tconn, singleUse) +} + +func (t *Transport) newTLSConfig(host string) *tls.Config { + cfg := new(tls.Config) + if t.TLSClientConfig != nil { + *cfg = *cloneTLSConfig(t.TLSClientConfig) + } + if !strSliceContains(cfg.NextProtos, NextProtoTLS) { + cfg.NextProtos = append([]string{NextProtoTLS}, cfg.NextProtos...) + } + if cfg.ServerName == "" { + cfg.ServerName = host + } + return cfg +} + +func (t *Transport) dialTLS() func(string, string, *tls.Config) (net.Conn, error) { + if t.DialTLS != nil { + return t.DialTLS + } + return t.dialTLSDefault +} + +func (t *Transport) dialTLSDefault(network, addr string, cfg *tls.Config) (net.Conn, error) { + cn, err := tls.Dial(network, addr, cfg) + if err != nil { + return nil, err + } + if err := cn.Handshake(); err != nil { + return nil, err + } + if !cfg.InsecureSkipVerify { + if err := cn.VerifyHostname(cfg.ServerName); err != nil { + return nil, err + } + } + state := cn.ConnectionState() + if p := state.NegotiatedProtocol; p != NextProtoTLS { + return nil, fmt.Errorf("http2: unexpected ALPN protocol %q; want %q", p, NextProtoTLS) + } + if !state.NegotiatedProtocolIsMutual { + return nil, errors.New("http2: could not negotiate protocol mutually") + } + return cn, nil +} + +// disableKeepAlives reports whether connections should be closed as +// soon as possible after handling the first request. +func (t *Transport) disableKeepAlives() bool { + return t.t1 != nil && t.t1.DisableKeepAlives +} + +func (t *Transport) expectContinueTimeout() time.Duration { + if t.t1 == nil { + return 0 + } + return transportExpectContinueTimeout(t.t1) +} + +func (t *Transport) NewClientConn(c net.Conn) (*ClientConn, error) { + return t.newClientConn(c, false) +} + +func (t *Transport) newClientConn(c net.Conn, singleUse bool) (*ClientConn, error) { + cc := &ClientConn{ + t: t, + tconn: c, + readerDone: make(chan struct{}), + nextStreamID: 1, + maxFrameSize: 16 << 10, // spec default + initialWindowSize: 65535, // spec default + maxConcurrentStreams: 1000, // "infinite", per spec. 1000 seems good enough. + streams: make(map[uint32]*clientStream), + singleUse: singleUse, + wantSettingsAck: true, + pings: make(map[[8]byte]chan struct{}), + } + if d := t.idleConnTimeout(); d != 0 { + cc.idleTimeout = d + cc.idleTimer = time.AfterFunc(d, cc.onIdleTimeout) + } + if VerboseLogs { + t.vlogf("http2: Transport creating client conn %p to %v", cc, c.RemoteAddr()) + } + + cc.cond = sync.NewCond(&cc.mu) + cc.flow.add(int32(initialWindowSize)) + + // TODO: adjust this writer size to account for frame size + + // MTU + crypto/tls record padding. + cc.bw = bufio.NewWriter(stickyErrWriter{c, &cc.werr}) + cc.br = bufio.NewReader(c) + cc.fr = NewFramer(cc.bw, cc.br) + cc.fr.ReadMetaHeaders = hpack.NewDecoder(initialHeaderTableSize, nil) + cc.fr.MaxHeaderListSize = t.maxHeaderListSize() + + // TODO: SetMaxDynamicTableSize, SetMaxDynamicTableSizeLimit on + // henc in response to SETTINGS frames? + cc.henc = hpack.NewEncoder(&cc.hbuf) + + if cs, ok := c.(connectionStater); ok { + state := cs.ConnectionState() + cc.tlsState = &state + } + + initialSettings := []Setting{ + {ID: SettingEnablePush, Val: 0}, + {ID: SettingInitialWindowSize, Val: transportDefaultStreamFlow}, + } + if max := t.maxHeaderListSize(); max != 0 { + initialSettings = append(initialSettings, Setting{ID: SettingMaxHeaderListSize, Val: max}) + } + + cc.bw.Write(clientPreface) + cc.fr.WriteSettings(initialSettings...) + cc.fr.WriteWindowUpdate(0, transportDefaultConnFlow) + cc.inflow.add(transportDefaultConnFlow + initialWindowSize) + cc.bw.Flush() + if cc.werr != nil { + return nil, cc.werr + } + + go cc.readLoop() + return cc, nil +} + +func (cc *ClientConn) setGoAway(f *GoAwayFrame) { + cc.mu.Lock() + defer cc.mu.Unlock() + + old := cc.goAway + cc.goAway = f + + // Merge the previous and current GoAway error frames. + if cc.goAwayDebug == "" { + cc.goAwayDebug = string(f.DebugData()) + } + if old != nil && old.ErrCode != ErrCodeNo { + cc.goAway.ErrCode = old.ErrCode + } + last := f.LastStreamID + for streamID, cs := range cc.streams { + if streamID > last { + select { + case cs.resc <- resAndError{err: errClientConnGotGoAway}: + default: + } + } + } +} + +func (cc *ClientConn) CanTakeNewRequest() bool { + cc.mu.Lock() + defer cc.mu.Unlock() + return cc.canTakeNewRequestLocked() +} + +func (cc *ClientConn) canTakeNewRequestLocked() bool { + if cc.singleUse && cc.nextStreamID > 1 { + return false + } + return cc.goAway == nil && !cc.closed && + int64(len(cc.streams)+1) < int64(cc.maxConcurrentStreams) && + cc.nextStreamID < math.MaxInt32 +} + +// onIdleTimeout is called from a time.AfterFunc goroutine. It will +// only be called when we're idle, but because we're coming from a new +// goroutine, there could be a new request coming in at the same time, +// so this simply calls the synchronized closeIfIdle to shut down this +// connection. The timer could just call closeIfIdle, but this is more +// clear. +func (cc *ClientConn) onIdleTimeout() { + cc.closeIfIdle() +} + +func (cc *ClientConn) closeIfIdle() { + cc.mu.Lock() + if len(cc.streams) > 0 { + cc.mu.Unlock() + return + } + cc.closed = true + nextID := cc.nextStreamID + // TODO: do clients send GOAWAY too? maybe? Just Close: + cc.mu.Unlock() + + if VerboseLogs { + cc.vlogf("http2: Transport closing idle conn %p (forSingleUse=%v, maxStream=%v)", cc, cc.singleUse, nextID-2) + } + cc.tconn.Close() +} + +const maxAllocFrameSize = 512 << 10 + +// frameBuffer returns a scratch buffer suitable for writing DATA frames. +// They're capped at the min of the peer's max frame size or 512KB +// (kinda arbitrarily), but definitely capped so we don't allocate 4GB +// bufers. +func (cc *ClientConn) frameScratchBuffer() []byte { + cc.mu.Lock() + size := cc.maxFrameSize + if size > maxAllocFrameSize { + size = maxAllocFrameSize + } + for i, buf := range cc.freeBuf { + if len(buf) >= int(size) { + cc.freeBuf[i] = nil + cc.mu.Unlock() + return buf[:size] + } + } + cc.mu.Unlock() + return make([]byte, size) +} + +func (cc *ClientConn) putFrameScratchBuffer(buf []byte) { + cc.mu.Lock() + defer cc.mu.Unlock() + const maxBufs = 4 // arbitrary; 4 concurrent requests per conn? investigate. + if len(cc.freeBuf) < maxBufs { + cc.freeBuf = append(cc.freeBuf, buf) + return + } + for i, old := range cc.freeBuf { + if old == nil { + cc.freeBuf[i] = buf + return + } + } + // forget about it. +} + +// errRequestCanceled is a copy of net/http's errRequestCanceled because it's not +// exported. At least they'll be DeepEqual for h1-vs-h2 comparisons tests. +var errRequestCanceled = errors.New("net/http: request canceled") + +func commaSeparatedTrailers(req *http.Request) (string, error) { + keys := make([]string, 0, len(req.Trailer)) + for k := range req.Trailer { + k = http.CanonicalHeaderKey(k) + switch k { + case "Transfer-Encoding", "Trailer", "Content-Length": + return "", &badStringError{"invalid Trailer key", k} + } + keys = append(keys, k) + } + if len(keys) > 0 { + sort.Strings(keys) + return strings.Join(keys, ","), nil + } + return "", nil +} + +func (cc *ClientConn) responseHeaderTimeout() time.Duration { + if cc.t.t1 != nil { + return cc.t.t1.ResponseHeaderTimeout + } + // No way to do this (yet?) with just an http2.Transport. Probably + // no need. Request.Cancel this is the new way. We only need to support + // this for compatibility with the old http.Transport fields when + // we're doing transparent http2. + return 0 +} + +// checkConnHeaders checks whether req has any invalid connection-level headers. +// per RFC 7540 section 8.1.2.2: Connection-Specific Header Fields. +// Certain headers are special-cased as okay but not transmitted later. +func checkConnHeaders(req *http.Request) error { + if v := req.Header.Get("Upgrade"); v != "" { + return fmt.Errorf("http2: invalid Upgrade request header: %q", req.Header["Upgrade"]) + } + if vv := req.Header["Transfer-Encoding"]; len(vv) > 0 && (len(vv) > 1 || vv[0] != "" && vv[0] != "chunked") { + return fmt.Errorf("http2: invalid Transfer-Encoding request header: %q", vv) + } + if vv := req.Header["Connection"]; len(vv) > 0 && (len(vv) > 1 || vv[0] != "" && vv[0] != "close" && vv[0] != "keep-alive") { + return fmt.Errorf("http2: invalid Connection request header: %q", vv) + } + return nil +} + +// actualContentLength returns a sanitized version of +// req.ContentLength, where 0 actually means zero (not unknown) and -1 +// means unknown. +func actualContentLength(req *http.Request) int64 { + if req.Body == nil { + return 0 + } + if req.ContentLength != 0 { + return req.ContentLength + } + return -1 +} + +func (cc *ClientConn) RoundTrip(req *http.Request) (*http.Response, error) { + if err := checkConnHeaders(req); err != nil { + return nil, err + } + if cc.idleTimer != nil { + cc.idleTimer.Stop() + } + + trailers, err := commaSeparatedTrailers(req) + if err != nil { + return nil, err + } + hasTrailers := trailers != "" + + cc.mu.Lock() + cc.lastActive = time.Now() + if cc.closed || !cc.canTakeNewRequestLocked() { + cc.mu.Unlock() + return nil, errClientConnUnusable + } + + body := req.Body + hasBody := body != nil + contentLen := actualContentLength(req) + + // TODO(bradfitz): this is a copy of the logic in net/http. Unify somewhere? + var requestedGzip bool + if !cc.t.disableCompression() && + req.Header.Get("Accept-Encoding") == "" && + req.Header.Get("Range") == "" && + req.Method != "HEAD" { + // Request gzip only, not deflate. Deflate is ambiguous and + // not as universally supported anyway. + // See: http://www.gzip.org/zlib/zlib_faq.html#faq38 + // + // Note that we don't request this for HEAD requests, + // due to a bug in nginx: + // http://trac.nginx.org/nginx/ticket/358 + // https://golang.org/issue/5522 + // + // We don't request gzip if the request is for a range, since + // auto-decoding a portion of a gzipped document will just fail + // anyway. See https://golang.org/issue/8923 + requestedGzip = true + } + + // we send: HEADERS{1}, CONTINUATION{0,} + DATA{0,} (DATA is + // sent by writeRequestBody below, along with any Trailers, + // again in form HEADERS{1}, CONTINUATION{0,}) + hdrs, err := cc.encodeHeaders(req, requestedGzip, trailers, contentLen) + if err != nil { + cc.mu.Unlock() + return nil, err + } + + cs := cc.newStream() + cs.req = req + cs.trace = requestTrace(req) + cs.requestedGzip = requestedGzip + bodyWriter := cc.t.getBodyWriterState(cs, body) + cs.on100 = bodyWriter.on100 + + cc.wmu.Lock() + endStream := !hasBody && !hasTrailers + werr := cc.writeHeaders(cs.ID, endStream, hdrs) + cc.wmu.Unlock() + traceWroteHeaders(cs.trace) + cc.mu.Unlock() + + if werr != nil { + if hasBody { + req.Body.Close() // per RoundTripper contract + bodyWriter.cancel() + } + cc.forgetStreamID(cs.ID) + // Don't bother sending a RST_STREAM (our write already failed; + // no need to keep writing) + traceWroteRequest(cs.trace, werr) + return nil, werr + } + + var respHeaderTimer <-chan time.Time + if hasBody { + bodyWriter.scheduleBodyWrite() + } else { + traceWroteRequest(cs.trace, nil) + if d := cc.responseHeaderTimeout(); d != 0 { + timer := time.NewTimer(d) + defer timer.Stop() + respHeaderTimer = timer.C + } + } + + readLoopResCh := cs.resc + bodyWritten := false + ctx := reqContext(req) + + handleReadLoopResponse := func(re resAndError) (*http.Response, error) { + res := re.res + if re.err != nil || res.StatusCode > 299 { + // On error or status code 3xx, 4xx, 5xx, etc abort any + // ongoing write, assuming that the server doesn't care + // about our request body. If the server replied with 1xx or + // 2xx, however, then assume the server DOES potentially + // want our body (e.g. full-duplex streaming: + // golang.org/issue/13444). If it turns out the server + // doesn't, they'll RST_STREAM us soon enough. This is a + // heuristic to avoid adding knobs to Transport. Hopefully + // we can keep it. + bodyWriter.cancel() + cs.abortRequestBodyWrite(errStopReqBodyWrite) + } + if re.err != nil { + if re.err == errClientConnGotGoAway { + cc.mu.Lock() + if cs.startedWrite { + re.err = errClientConnGotGoAwayAfterSomeReqBody + } + cc.mu.Unlock() + } + cc.forgetStreamID(cs.ID) + return nil, re.err + } + res.Request = req + res.TLS = cc.tlsState + return res, nil + } + + for { + select { + case re := <-readLoopResCh: + return handleReadLoopResponse(re) + case <-respHeaderTimer: + cc.forgetStreamID(cs.ID) + if !hasBody || bodyWritten { + cc.writeStreamReset(cs.ID, ErrCodeCancel, nil) + } else { + bodyWriter.cancel() + cs.abortRequestBodyWrite(errStopReqBodyWriteAndCancel) + } + return nil, errTimeout + case <-ctx.Done(): + cc.forgetStreamID(cs.ID) + if !hasBody || bodyWritten { + cc.writeStreamReset(cs.ID, ErrCodeCancel, nil) + } else { + bodyWriter.cancel() + cs.abortRequestBodyWrite(errStopReqBodyWriteAndCancel) + } + return nil, ctx.Err() + case <-req.Cancel: + cc.forgetStreamID(cs.ID) + if !hasBody || bodyWritten { + cc.writeStreamReset(cs.ID, ErrCodeCancel, nil) + } else { + bodyWriter.cancel() + cs.abortRequestBodyWrite(errStopReqBodyWriteAndCancel) + } + return nil, errRequestCanceled + case <-cs.peerReset: + // processResetStream already removed the + // stream from the streams map; no need for + // forgetStreamID. + return nil, cs.resetErr + case err := <-bodyWriter.resc: + // Prefer the read loop's response, if available. Issue 16102. + select { + case re := <-readLoopResCh: + return handleReadLoopResponse(re) + default: + } + if err != nil { + return nil, err + } + bodyWritten = true + if d := cc.responseHeaderTimeout(); d != 0 { + timer := time.NewTimer(d) + defer timer.Stop() + respHeaderTimer = timer.C + } + } + } +} + +// requires cc.wmu be held +func (cc *ClientConn) writeHeaders(streamID uint32, endStream bool, hdrs []byte) error { + first := true // first frame written (HEADERS is first, then CONTINUATION) + frameSize := int(cc.maxFrameSize) + for len(hdrs) > 0 && cc.werr == nil { + chunk := hdrs + if len(chunk) > frameSize { + chunk = chunk[:frameSize] + } + hdrs = hdrs[len(chunk):] + endHeaders := len(hdrs) == 0 + if first { + cc.fr.WriteHeaders(HeadersFrameParam{ + StreamID: streamID, + BlockFragment: chunk, + EndStream: endStream, + EndHeaders: endHeaders, + }) + first = false + } else { + cc.fr.WriteContinuation(streamID, endHeaders, chunk) + } + } + // TODO(bradfitz): this Flush could potentially block (as + // could the WriteHeaders call(s) above), which means they + // wouldn't respond to Request.Cancel being readable. That's + // rare, but this should probably be in a goroutine. + cc.bw.Flush() + return cc.werr +} + +// internal error values; they don't escape to callers +var ( + // abort request body write; don't send cancel + errStopReqBodyWrite = errors.New("http2: aborting request body write") + + // abort request body write, but send stream reset of cancel. + errStopReqBodyWriteAndCancel = errors.New("http2: canceling request") +) + +func (cs *clientStream) writeRequestBody(body io.Reader, bodyCloser io.Closer) (err error) { + cc := cs.cc + sentEnd := false // whether we sent the final DATA frame w/ END_STREAM + buf := cc.frameScratchBuffer() + defer cc.putFrameScratchBuffer(buf) + + defer func() { + traceWroteRequest(cs.trace, err) + // TODO: write h12Compare test showing whether + // Request.Body is closed by the Transport, + // and in multiple cases: server replies <=299 and >299 + // while still writing request body + cerr := bodyCloser.Close() + if err == nil { + err = cerr + } + }() + + req := cs.req + hasTrailers := req.Trailer != nil + + var sawEOF bool + for !sawEOF { + n, err := body.Read(buf) + if err == io.EOF { + sawEOF = true + err = nil + } else if err != nil { + return err + } + + remain := buf[:n] + for len(remain) > 0 && err == nil { + var allowed int32 + allowed, err = cs.awaitFlowControl(len(remain)) + switch { + case err == errStopReqBodyWrite: + return err + case err == errStopReqBodyWriteAndCancel: + cc.writeStreamReset(cs.ID, ErrCodeCancel, nil) + return err + case err != nil: + return err + } + cc.wmu.Lock() + data := remain[:allowed] + remain = remain[allowed:] + sentEnd = sawEOF && len(remain) == 0 && !hasTrailers + err = cc.fr.WriteData(cs.ID, sentEnd, data) + if err == nil { + // TODO(bradfitz): this flush is for latency, not bandwidth. + // Most requests won't need this. Make this opt-in or + // opt-out? Use some heuristic on the body type? Nagel-like + // timers? Based on 'n'? Only last chunk of this for loop, + // unless flow control tokens are low? For now, always. + // If we change this, see comment below. + err = cc.bw.Flush() + } + cc.wmu.Unlock() + } + if err != nil { + return err + } + } + + if sentEnd { + // Already sent END_STREAM (which implies we have no + // trailers) and flushed, because currently all + // WriteData frames above get a flush. So we're done. + return nil + } + + var trls []byte + if hasTrailers { + cc.mu.Lock() + defer cc.mu.Unlock() + trls = cc.encodeTrailers(req) + } + + cc.wmu.Lock() + defer cc.wmu.Unlock() + + // Two ways to send END_STREAM: either with trailers, or + // with an empty DATA frame. + if len(trls) > 0 { + err = cc.writeHeaders(cs.ID, true, trls) + } else { + err = cc.fr.WriteData(cs.ID, true, nil) + } + if ferr := cc.bw.Flush(); ferr != nil && err == nil { + err = ferr + } + return err +} + +// awaitFlowControl waits for [1, min(maxBytes, cc.cs.maxFrameSize)] flow +// control tokens from the server. +// It returns either the non-zero number of tokens taken or an error +// if the stream is dead. +func (cs *clientStream) awaitFlowControl(maxBytes int) (taken int32, err error) { + cc := cs.cc + cc.mu.Lock() + defer cc.mu.Unlock() + for { + if cc.closed { + return 0, errClientConnClosed + } + if cs.stopReqBody != nil { + return 0, cs.stopReqBody + } + if err := cs.checkResetOrDone(); err != nil { + return 0, err + } + if a := cs.flow.available(); a > 0 { + take := a + if int(take) > maxBytes { + + take = int32(maxBytes) // can't truncate int; take is int32 + } + if take > int32(cc.maxFrameSize) { + take = int32(cc.maxFrameSize) + } + cs.flow.take(take) + return take, nil + } + cc.cond.Wait() + } +} + +type badStringError struct { + what string + str string +} + +func (e *badStringError) Error() string { return fmt.Sprintf("%s %q", e.what, e.str) } + +// requires cc.mu be held. +func (cc *ClientConn) encodeHeaders(req *http.Request, addGzipHeader bool, trailers string, contentLength int64) ([]byte, error) { + cc.hbuf.Reset() + + host := req.Host + if host == "" { + host = req.URL.Host + } + host, err := httplex.PunycodeHostPort(host) + if err != nil { + return nil, err + } + + var path string + if req.Method != "CONNECT" { + path = req.URL.RequestURI() + if !validPseudoPath(path) { + orig := path + path = strings.TrimPrefix(path, req.URL.Scheme+"://"+host) + if !validPseudoPath(path) { + if req.URL.Opaque != "" { + return nil, fmt.Errorf("invalid request :path %q from URL.Opaque = %q", orig, req.URL.Opaque) + } else { + return nil, fmt.Errorf("invalid request :path %q", orig) + } + } + } + } + + // Check for any invalid headers and return an error before we + // potentially pollute our hpack state. (We want to be able to + // continue to reuse the hpack encoder for future requests) + for k, vv := range req.Header { + if !httplex.ValidHeaderFieldName(k) { + return nil, fmt.Errorf("invalid HTTP header name %q", k) + } + for _, v := range vv { + if !httplex.ValidHeaderFieldValue(v) { + return nil, fmt.Errorf("invalid HTTP header value %q for header %q", v, k) + } + } + } + + // 8.1.2.3 Request Pseudo-Header Fields + // The :path pseudo-header field includes the path and query parts of the + // target URI (the path-absolute production and optionally a '?' character + // followed by the query production (see Sections 3.3 and 3.4 of + // [RFC3986]). + cc.writeHeader(":authority", host) + cc.writeHeader(":method", req.Method) + if req.Method != "CONNECT" { + cc.writeHeader(":path", path) + cc.writeHeader(":scheme", req.URL.Scheme) + } + if trailers != "" { + cc.writeHeader("trailer", trailers) + } + + var didUA bool + for k, vv := range req.Header { + lowKey := strings.ToLower(k) + switch lowKey { + case "host", "content-length": + // Host is :authority, already sent. + // Content-Length is automatic, set below. + continue + case "connection", "proxy-connection", "transfer-encoding", "upgrade", "keep-alive": + // Per 8.1.2.2 Connection-Specific Header + // Fields, don't send connection-specific + // fields. We have already checked if any + // are error-worthy so just ignore the rest. + continue + case "user-agent": + // Match Go's http1 behavior: at most one + // User-Agent. If set to nil or empty string, + // then omit it. Otherwise if not mentioned, + // include the default (below). + didUA = true + if len(vv) < 1 { + continue + } + vv = vv[:1] + if vv[0] == "" { + continue + } + } + for _, v := range vv { + cc.writeHeader(lowKey, v) + } + } + if shouldSendReqContentLength(req.Method, contentLength) { + cc.writeHeader("content-length", strconv.FormatInt(contentLength, 10)) + } + if addGzipHeader { + cc.writeHeader("accept-encoding", "gzip") + } + if !didUA { + cc.writeHeader("user-agent", defaultUserAgent) + } + return cc.hbuf.Bytes(), nil +} + +// shouldSendReqContentLength reports whether the http2.Transport should send +// a "content-length" request header. This logic is basically a copy of the net/http +// transferWriter.shouldSendContentLength. +// The contentLength is the corrected contentLength (so 0 means actually 0, not unknown). +// -1 means unknown. +func shouldSendReqContentLength(method string, contentLength int64) bool { + if contentLength > 0 { + return true + } + if contentLength < 0 { + return false + } + // For zero bodies, whether we send a content-length depends on the method. + // It also kinda doesn't matter for http2 either way, with END_STREAM. + switch method { + case "POST", "PUT", "PATCH": + return true + default: + return false + } +} + +// requires cc.mu be held. +func (cc *ClientConn) encodeTrailers(req *http.Request) []byte { + cc.hbuf.Reset() + for k, vv := range req.Trailer { + // Transfer-Encoding, etc.. have already been filter at the + // start of RoundTrip + lowKey := strings.ToLower(k) + for _, v := range vv { + cc.writeHeader(lowKey, v) + } + } + return cc.hbuf.Bytes() +} + +func (cc *ClientConn) writeHeader(name, value string) { + if VerboseLogs { + log.Printf("http2: Transport encoding header %q = %q", name, value) + } + cc.henc.WriteField(hpack.HeaderField{Name: name, Value: value}) +} + +type resAndError struct { + res *http.Response + err error +} + +// requires cc.mu be held. +func (cc *ClientConn) newStream() *clientStream { + cs := &clientStream{ + cc: cc, + ID: cc.nextStreamID, + resc: make(chan resAndError, 1), + peerReset: make(chan struct{}), + done: make(chan struct{}), + } + cs.flow.add(int32(cc.initialWindowSize)) + cs.flow.setConnFlow(&cc.flow) + cs.inflow.add(transportDefaultStreamFlow) + cs.inflow.setConnFlow(&cc.inflow) + cc.nextStreamID += 2 + cc.streams[cs.ID] = cs + return cs +} + +func (cc *ClientConn) forgetStreamID(id uint32) { + cc.streamByID(id, true) +} + +func (cc *ClientConn) streamByID(id uint32, andRemove bool) *clientStream { + cc.mu.Lock() + defer cc.mu.Unlock() + cs := cc.streams[id] + if andRemove && cs != nil && !cc.closed { + cc.lastActive = time.Now() + delete(cc.streams, id) + if len(cc.streams) == 0 && cc.idleTimer != nil { + cc.idleTimer.Reset(cc.idleTimeout) + } + close(cs.done) + cc.cond.Broadcast() // wake up checkResetOrDone via clientStream.awaitFlowControl + } + return cs +} + +// clientConnReadLoop is the state owned by the clientConn's frame-reading readLoop. +type clientConnReadLoop struct { + cc *ClientConn + activeRes map[uint32]*clientStream // keyed by streamID + closeWhenIdle bool +} + +// readLoop runs in its own goroutine and reads and dispatches frames. +func (cc *ClientConn) readLoop() { + rl := &clientConnReadLoop{ + cc: cc, + activeRes: make(map[uint32]*clientStream), + } + + defer rl.cleanup() + cc.readerErr = rl.run() + if ce, ok := cc.readerErr.(ConnectionError); ok { + cc.wmu.Lock() + cc.fr.WriteGoAway(0, ErrCode(ce), nil) + cc.wmu.Unlock() + } +} + +// GoAwayError is returned by the Transport when the server closes the +// TCP connection after sending a GOAWAY frame. +type GoAwayError struct { + LastStreamID uint32 + ErrCode ErrCode + DebugData string +} + +func (e GoAwayError) Error() string { + return fmt.Sprintf("http2: server sent GOAWAY and closed the connection; LastStreamID=%v, ErrCode=%v, debug=%q", + e.LastStreamID, e.ErrCode, e.DebugData) +} + +func isEOFOrNetReadError(err error) bool { + if err == io.EOF { + return true + } + ne, ok := err.(*net.OpError) + return ok && ne.Op == "read" +} + +func (rl *clientConnReadLoop) cleanup() { + cc := rl.cc + defer cc.tconn.Close() + defer cc.t.connPool().MarkDead(cc) + defer close(cc.readerDone) + + if cc.idleTimer != nil { + cc.idleTimer.Stop() + } + + // Close any response bodies if the server closes prematurely. + // TODO: also do this if we've written the headers but not + // gotten a response yet. + err := cc.readerErr + cc.mu.Lock() + if cc.goAway != nil && isEOFOrNetReadError(err) { + err = GoAwayError{ + LastStreamID: cc.goAway.LastStreamID, + ErrCode: cc.goAway.ErrCode, + DebugData: cc.goAwayDebug, + } + } else if err == io.EOF { + err = io.ErrUnexpectedEOF + } + for _, cs := range rl.activeRes { + cs.bufPipe.CloseWithError(err) + } + for _, cs := range cc.streams { + select { + case cs.resc <- resAndError{err: err}: + default: + } + close(cs.done) + } + cc.closed = true + cc.cond.Broadcast() + cc.mu.Unlock() +} + +func (rl *clientConnReadLoop) run() error { + cc := rl.cc + rl.closeWhenIdle = cc.t.disableKeepAlives() || cc.singleUse + gotReply := false // ever saw a HEADERS reply + gotSettings := false + for { + f, err := cc.fr.ReadFrame() + if err != nil { + cc.vlogf("http2: Transport readFrame error on conn %p: (%T) %v", cc, err, err) + } + if se, ok := err.(StreamError); ok { + if cs := cc.streamByID(se.StreamID, true /*ended; remove it*/); cs != nil { + cs.cc.writeStreamReset(cs.ID, se.Code, err) + if se.Cause == nil { + se.Cause = cc.fr.errDetail + } + rl.endStreamError(cs, se) + } + continue + } else if err != nil { + return err + } + if VerboseLogs { + cc.vlogf("http2: Transport received %s", summarizeFrame(f)) + } + if !gotSettings { + if _, ok := f.(*SettingsFrame); !ok { + cc.logf("protocol error: received %T before a SETTINGS frame", f) + return ConnectionError(ErrCodeProtocol) + } + gotSettings = true + } + maybeIdle := false // whether frame might transition us to idle + + switch f := f.(type) { + case *MetaHeadersFrame: + err = rl.processHeaders(f) + maybeIdle = true + gotReply = true + case *DataFrame: + err = rl.processData(f) + maybeIdle = true + case *GoAwayFrame: + err = rl.processGoAway(f) + maybeIdle = true + case *RSTStreamFrame: + err = rl.processResetStream(f) + maybeIdle = true + case *SettingsFrame: + err = rl.processSettings(f) + case *PushPromiseFrame: + err = rl.processPushPromise(f) + case *WindowUpdateFrame: + err = rl.processWindowUpdate(f) + case *PingFrame: + err = rl.processPing(f) + default: + cc.logf("Transport: unhandled response frame type %T", f) + } + if err != nil { + if VerboseLogs { + cc.vlogf("http2: Transport conn %p received error from processing frame %v: %v", cc, summarizeFrame(f), err) + } + return err + } + if rl.closeWhenIdle && gotReply && maybeIdle && len(rl.activeRes) == 0 { + cc.closeIfIdle() + } + } +} + +func (rl *clientConnReadLoop) processHeaders(f *MetaHeadersFrame) error { + cc := rl.cc + cs := cc.streamByID(f.StreamID, f.StreamEnded()) + if cs == nil { + // We'd get here if we canceled a request while the + // server had its response still in flight. So if this + // was just something we canceled, ignore it. + return nil + } + if !cs.firstByte { + if cs.trace != nil { + // TODO(bradfitz): move first response byte earlier, + // when we first read the 9 byte header, not waiting + // until all the HEADERS+CONTINUATION frames have been + // merged. This works for now. + traceFirstResponseByte(cs.trace) + } + cs.firstByte = true + } + if !cs.pastHeaders { + cs.pastHeaders = true + } else { + return rl.processTrailers(cs, f) + } + + res, err := rl.handleResponse(cs, f) + if err != nil { + if _, ok := err.(ConnectionError); ok { + return err + } + // Any other error type is a stream error. + cs.cc.writeStreamReset(f.StreamID, ErrCodeProtocol, err) + cs.resc <- resAndError{err: err} + return nil // return nil from process* funcs to keep conn alive + } + if res == nil { + // (nil, nil) special case. See handleResponse docs. + return nil + } + if res.Body != noBody { + rl.activeRes[cs.ID] = cs + } + cs.resTrailer = &res.Trailer + cs.resc <- resAndError{res: res} + return nil +} + +// may return error types nil, or ConnectionError. Any other error value +// is a StreamError of type ErrCodeProtocol. The returned error in that case +// is the detail. +// +// As a special case, handleResponse may return (nil, nil) to skip the +// frame (currently only used for 100 expect continue). This special +// case is going away after Issue 13851 is fixed. +func (rl *clientConnReadLoop) handleResponse(cs *clientStream, f *MetaHeadersFrame) (*http.Response, error) { + if f.Truncated { + return nil, errResponseHeaderListSize + } + + status := f.PseudoValue("status") + if status == "" { + return nil, errors.New("missing status pseudo header") + } + statusCode, err := strconv.Atoi(status) + if err != nil { + return nil, errors.New("malformed non-numeric status pseudo header") + } + + if statusCode == 100 { + traceGot100Continue(cs.trace) + if cs.on100 != nil { + cs.on100() // forces any write delay timer to fire + } + cs.pastHeaders = false // do it all again + return nil, nil + } + + header := make(http.Header) + res := &http.Response{ + Proto: "HTTP/2.0", + ProtoMajor: 2, + Header: header, + StatusCode: statusCode, + Status: status + " " + http.StatusText(statusCode), + } + for _, hf := range f.RegularFields() { + key := http.CanonicalHeaderKey(hf.Name) + if key == "Trailer" { + t := res.Trailer + if t == nil { + t = make(http.Header) + res.Trailer = t + } + foreachHeaderElement(hf.Value, func(v string) { + t[http.CanonicalHeaderKey(v)] = nil + }) + } else { + header[key] = append(header[key], hf.Value) + } + } + + streamEnded := f.StreamEnded() + isHead := cs.req.Method == "HEAD" + if !streamEnded || isHead { + res.ContentLength = -1 + if clens := res.Header["Content-Length"]; len(clens) == 1 { + if clen64, err := strconv.ParseInt(clens[0], 10, 64); err == nil { + res.ContentLength = clen64 + } else { + // TODO: care? unlike http/1, it won't mess up our framing, so it's + // more safe smuggling-wise to ignore. + } + } else if len(clens) > 1 { + // TODO: care? unlike http/1, it won't mess up our framing, so it's + // more safe smuggling-wise to ignore. + } + } + + if streamEnded || isHead { + res.Body = noBody + return res, nil + } + + buf := new(bytes.Buffer) // TODO(bradfitz): recycle this garbage + cs.bufPipe = pipe{b: buf} + cs.bytesRemain = res.ContentLength + res.Body = transportResponseBody{cs} + go cs.awaitRequestCancel(cs.req) + + if cs.requestedGzip && res.Header.Get("Content-Encoding") == "gzip" { + res.Header.Del("Content-Encoding") + res.Header.Del("Content-Length") + res.ContentLength = -1 + res.Body = &gzipReader{body: res.Body} + setResponseUncompressed(res) + } + return res, nil +} + +func (rl *clientConnReadLoop) processTrailers(cs *clientStream, f *MetaHeadersFrame) error { + if cs.pastTrailers { + // Too many HEADERS frames for this stream. + return ConnectionError(ErrCodeProtocol) + } + cs.pastTrailers = true + if !f.StreamEnded() { + // We expect that any headers for trailers also + // has END_STREAM. + return ConnectionError(ErrCodeProtocol) + } + if len(f.PseudoFields()) > 0 { + // No pseudo header fields are defined for trailers. + // TODO: ConnectionError might be overly harsh? Check. + return ConnectionError(ErrCodeProtocol) + } + + trailer := make(http.Header) + for _, hf := range f.RegularFields() { + key := http.CanonicalHeaderKey(hf.Name) + trailer[key] = append(trailer[key], hf.Value) + } + cs.trailer = trailer + + rl.endStream(cs) + return nil +} + +// transportResponseBody is the concrete type of Transport.RoundTrip's +// Response.Body. It is an io.ReadCloser. On Read, it reads from cs.body. +// On Close it sends RST_STREAM if EOF wasn't already seen. +type transportResponseBody struct { + cs *clientStream +} + +func (b transportResponseBody) Read(p []byte) (n int, err error) { + cs := b.cs + cc := cs.cc + + if cs.readErr != nil { + return 0, cs.readErr + } + n, err = b.cs.bufPipe.Read(p) + if cs.bytesRemain != -1 { + if int64(n) > cs.bytesRemain { + n = int(cs.bytesRemain) + if err == nil { + err = errors.New("net/http: server replied with more than declared Content-Length; truncated") + cc.writeStreamReset(cs.ID, ErrCodeProtocol, err) + } + cs.readErr = err + return int(cs.bytesRemain), err + } + cs.bytesRemain -= int64(n) + if err == io.EOF && cs.bytesRemain > 0 { + err = io.ErrUnexpectedEOF + cs.readErr = err + return n, err + } + } + if n == 0 { + // No flow control tokens to send back. + return + } + + cc.mu.Lock() + defer cc.mu.Unlock() + + var connAdd, streamAdd int32 + // Check the conn-level first, before the stream-level. + if v := cc.inflow.available(); v < transportDefaultConnFlow/2 { + connAdd = transportDefaultConnFlow - v + cc.inflow.add(connAdd) + } + if err == nil { // No need to refresh if the stream is over or failed. + // Consider any buffered body data (read from the conn but not + // consumed by the client) when computing flow control for this + // stream. + v := int(cs.inflow.available()) + cs.bufPipe.Len() + if v < transportDefaultStreamFlow-transportDefaultStreamMinRefresh { + streamAdd = int32(transportDefaultStreamFlow - v) + cs.inflow.add(streamAdd) + } + } + if connAdd != 0 || streamAdd != 0 { + cc.wmu.Lock() + defer cc.wmu.Unlock() + if connAdd != 0 { + cc.fr.WriteWindowUpdate(0, mustUint31(connAdd)) + } + if streamAdd != 0 { + cc.fr.WriteWindowUpdate(cs.ID, mustUint31(streamAdd)) + } + cc.bw.Flush() + } + return +} + +var errClosedResponseBody = errors.New("http2: response body closed") + +func (b transportResponseBody) Close() error { + cs := b.cs + cc := cs.cc + + serverSentStreamEnd := cs.bufPipe.Err() == io.EOF + unread := cs.bufPipe.Len() + + if unread > 0 || !serverSentStreamEnd { + cc.mu.Lock() + cc.wmu.Lock() + if !serverSentStreamEnd { + cc.fr.WriteRSTStream(cs.ID, ErrCodeCancel) + } + // Return connection-level flow control. + if unread > 0 { + cc.inflow.add(int32(unread)) + cc.fr.WriteWindowUpdate(0, uint32(unread)) + } + cc.bw.Flush() + cc.wmu.Unlock() + cc.mu.Unlock() + } + + cs.bufPipe.BreakWithError(errClosedResponseBody) + return nil +} + +func (rl *clientConnReadLoop) processData(f *DataFrame) error { + cc := rl.cc + cs := cc.streamByID(f.StreamID, f.StreamEnded()) + data := f.Data() + if cs == nil { + cc.mu.Lock() + neverSent := cc.nextStreamID + cc.mu.Unlock() + if f.StreamID >= neverSent { + // We never asked for this. + cc.logf("http2: Transport received unsolicited DATA frame; closing connection") + return ConnectionError(ErrCodeProtocol) + } + // We probably did ask for this, but canceled. Just ignore it. + // TODO: be stricter here? only silently ignore things which + // we canceled, but not things which were closed normally + // by the peer? Tough without accumulating too much state. + + // But at least return their flow control: + if f.Length > 0 { + cc.mu.Lock() + cc.inflow.add(int32(f.Length)) + cc.mu.Unlock() + + cc.wmu.Lock() + cc.fr.WriteWindowUpdate(0, uint32(f.Length)) + cc.bw.Flush() + cc.wmu.Unlock() + } + return nil + } + if f.Length > 0 { + if len(data) > 0 && cs.bufPipe.b == nil { + // Data frame after it's already closed? + cc.logf("http2: Transport received DATA frame for closed stream; closing connection") + return ConnectionError(ErrCodeProtocol) + } + + // Check connection-level flow control. + cc.mu.Lock() + if cs.inflow.available() >= int32(f.Length) { + cs.inflow.take(int32(f.Length)) + } else { + cc.mu.Unlock() + return ConnectionError(ErrCodeFlowControl) + } + // Return any padded flow control now, since we won't + // refund it later on body reads. + if pad := int32(f.Length) - int32(len(data)); pad > 0 { + cs.inflow.add(pad) + cc.inflow.add(pad) + cc.wmu.Lock() + cc.fr.WriteWindowUpdate(0, uint32(pad)) + cc.fr.WriteWindowUpdate(cs.ID, uint32(pad)) + cc.bw.Flush() + cc.wmu.Unlock() + } + didReset := cs.didReset + cc.mu.Unlock() + + if len(data) > 0 && !didReset { + if _, err := cs.bufPipe.Write(data); err != nil { + rl.endStreamError(cs, err) + return err + } + } + } + + if f.StreamEnded() { + rl.endStream(cs) + } + return nil +} + +var errInvalidTrailers = errors.New("http2: invalid trailers") + +func (rl *clientConnReadLoop) endStream(cs *clientStream) { + // TODO: check that any declared content-length matches, like + // server.go's (*stream).endStream method. + rl.endStreamError(cs, nil) +} + +func (rl *clientConnReadLoop) endStreamError(cs *clientStream, err error) { + var code func() + if err == nil { + err = io.EOF + code = cs.copyTrailers + } + cs.bufPipe.closeWithErrorAndCode(err, code) + delete(rl.activeRes, cs.ID) + if isConnectionCloseRequest(cs.req) { + rl.closeWhenIdle = true + } + + select { + case cs.resc <- resAndError{err: err}: + default: + } +} + +func (cs *clientStream) copyTrailers() { + for k, vv := range cs.trailer { + t := cs.resTrailer + if *t == nil { + *t = make(http.Header) + } + (*t)[k] = vv + } +} + +func (rl *clientConnReadLoop) processGoAway(f *GoAwayFrame) error { + cc := rl.cc + cc.t.connPool().MarkDead(cc) + if f.ErrCode != 0 { + // TODO: deal with GOAWAY more. particularly the error code + cc.vlogf("transport got GOAWAY with error code = %v", f.ErrCode) + } + cc.setGoAway(f) + return nil +} + +func (rl *clientConnReadLoop) processSettings(f *SettingsFrame) error { + cc := rl.cc + cc.mu.Lock() + defer cc.mu.Unlock() + + if f.IsAck() { + if cc.wantSettingsAck { + cc.wantSettingsAck = false + return nil + } + return ConnectionError(ErrCodeProtocol) + } + + err := f.ForeachSetting(func(s Setting) error { + switch s.ID { + case SettingMaxFrameSize: + cc.maxFrameSize = s.Val + case SettingMaxConcurrentStreams: + cc.maxConcurrentStreams = s.Val + case SettingInitialWindowSize: + // Values above the maximum flow-control + // window size of 2^31-1 MUST be treated as a + // connection error (Section 5.4.1) of type + // FLOW_CONTROL_ERROR. + if s.Val > math.MaxInt32 { + return ConnectionError(ErrCodeFlowControl) + } + + // Adjust flow control of currently-open + // frames by the difference of the old initial + // window size and this one. + delta := int32(s.Val) - int32(cc.initialWindowSize) + for _, cs := range cc.streams { + cs.flow.add(delta) + } + cc.cond.Broadcast() + + cc.initialWindowSize = s.Val + default: + // TODO(bradfitz): handle more settings? SETTINGS_HEADER_TABLE_SIZE probably. + cc.vlogf("Unhandled Setting: %v", s) + } + return nil + }) + if err != nil { + return err + } + + cc.wmu.Lock() + defer cc.wmu.Unlock() + + cc.fr.WriteSettingsAck() + cc.bw.Flush() + return cc.werr +} + +func (rl *clientConnReadLoop) processWindowUpdate(f *WindowUpdateFrame) error { + cc := rl.cc + cs := cc.streamByID(f.StreamID, false) + if f.StreamID != 0 && cs == nil { + return nil + } + + cc.mu.Lock() + defer cc.mu.Unlock() + + fl := &cc.flow + if cs != nil { + fl = &cs.flow + } + if !fl.add(int32(f.Increment)) { + return ConnectionError(ErrCodeFlowControl) + } + cc.cond.Broadcast() + return nil +} + +func (rl *clientConnReadLoop) processResetStream(f *RSTStreamFrame) error { + cs := rl.cc.streamByID(f.StreamID, true) + if cs == nil { + // TODO: return error if server tries to RST_STEAM an idle stream + return nil + } + select { + case <-cs.peerReset: + // Already reset. + // This is the only goroutine + // which closes this, so there + // isn't a race. + default: + err := streamError(cs.ID, f.ErrCode) + cs.resetErr = err + close(cs.peerReset) + cs.bufPipe.CloseWithError(err) + cs.cc.cond.Broadcast() // wake up checkResetOrDone via clientStream.awaitFlowControl + } + delete(rl.activeRes, cs.ID) + return nil +} + +// Ping sends a PING frame to the server and waits for the ack. +// Public implementation is in go17.go and not_go17.go +func (cc *ClientConn) ping(ctx contextContext) error { + c := make(chan struct{}) + // Generate a random payload + var p [8]byte + for { + if _, err := rand.Read(p[:]); err != nil { + return err + } + cc.mu.Lock() + // check for dup before insert + if _, found := cc.pings[p]; !found { + cc.pings[p] = c + cc.mu.Unlock() + break + } + cc.mu.Unlock() + } + cc.wmu.Lock() + if err := cc.fr.WritePing(false, p); err != nil { + cc.wmu.Unlock() + return err + } + if err := cc.bw.Flush(); err != nil { + cc.wmu.Unlock() + return err + } + cc.wmu.Unlock() + select { + case <-c: + return nil + case <-ctx.Done(): + return ctx.Err() + case <-cc.readerDone: + // connection closed + return cc.readerErr + } +} + +func (rl *clientConnReadLoop) processPing(f *PingFrame) error { + if f.IsAck() { + cc := rl.cc + cc.mu.Lock() + defer cc.mu.Unlock() + // If ack, notify listener if any + if c, ok := cc.pings[f.Data]; ok { + close(c) + delete(cc.pings, f.Data) + } + return nil + } + cc := rl.cc + cc.wmu.Lock() + defer cc.wmu.Unlock() + if err := cc.fr.WritePing(true, f.Data); err != nil { + return err + } + return cc.bw.Flush() +} + +func (rl *clientConnReadLoop) processPushPromise(f *PushPromiseFrame) error { + // We told the peer we don't want them. + // Spec says: + // "PUSH_PROMISE MUST NOT be sent if the SETTINGS_ENABLE_PUSH + // setting of the peer endpoint is set to 0. An endpoint that + // has set this setting and has received acknowledgement MUST + // treat the receipt of a PUSH_PROMISE frame as a connection + // error (Section 5.4.1) of type PROTOCOL_ERROR." + return ConnectionError(ErrCodeProtocol) +} + +func (cc *ClientConn) writeStreamReset(streamID uint32, code ErrCode, err error) { + // TODO: map err to more interesting error codes, once the + // HTTP community comes up with some. But currently for + // RST_STREAM there's no equivalent to GOAWAY frame's debug + // data, and the error codes are all pretty vague ("cancel"). + cc.wmu.Lock() + cc.fr.WriteRSTStream(streamID, code) + cc.bw.Flush() + cc.wmu.Unlock() +} + +var ( + errResponseHeaderListSize = errors.New("http2: response header list larger than advertised limit") + errPseudoTrailers = errors.New("http2: invalid pseudo header in trailers") +) + +func (cc *ClientConn) logf(format string, args ...interface{}) { + cc.t.logf(format, args...) +} + +func (cc *ClientConn) vlogf(format string, args ...interface{}) { + cc.t.vlogf(format, args...) +} + +func (t *Transport) vlogf(format string, args ...interface{}) { + if VerboseLogs { + t.logf(format, args...) + } +} + +func (t *Transport) logf(format string, args ...interface{}) { + log.Printf(format, args...) +} + +var noBody io.ReadCloser = ioutil.NopCloser(bytes.NewReader(nil)) + +func strSliceContains(ss []string, s string) bool { + for _, v := range ss { + if v == s { + return true + } + } + return false +} + +type erringRoundTripper struct{ err error } + +func (rt erringRoundTripper) RoundTrip(*http.Request) (*http.Response, error) { return nil, rt.err } + +// gzipReader wraps a response body so it can lazily +// call gzip.NewReader on the first call to Read +type gzipReader struct { + body io.ReadCloser // underlying Response.Body + zr *gzip.Reader // lazily-initialized gzip reader + zerr error // sticky error +} + +func (gz *gzipReader) Read(p []byte) (n int, err error) { + if gz.zerr != nil { + return 0, gz.zerr + } + if gz.zr == nil { + gz.zr, err = gzip.NewReader(gz.body) + if err != nil { + gz.zerr = err + return 0, err + } + } + return gz.zr.Read(p) +} + +func (gz *gzipReader) Close() error { + return gz.body.Close() +} + +type errorReader struct{ err error } + +func (r errorReader) Read(p []byte) (int, error) { return 0, r.err } + +// bodyWriterState encapsulates various state around the Transport's writing +// of the request body, particularly regarding doing delayed writes of the body +// when the request contains "Expect: 100-continue". +type bodyWriterState struct { + cs *clientStream + timer *time.Timer // if non-nil, we're doing a delayed write + fnonce *sync.Once // to call fn with + fn func() // the code to run in the goroutine, writing the body + resc chan error // result of fn's execution + delay time.Duration // how long we should delay a delayed write for +} + +func (t *Transport) getBodyWriterState(cs *clientStream, body io.Reader) (s bodyWriterState) { + s.cs = cs + if body == nil { + return + } + resc := make(chan error, 1) + s.resc = resc + s.fn = func() { + cs.cc.mu.Lock() + cs.startedWrite = true + cs.cc.mu.Unlock() + resc <- cs.writeRequestBody(body, cs.req.Body) + } + s.delay = t.expectContinueTimeout() + if s.delay == 0 || + !httplex.HeaderValuesContainsToken( + cs.req.Header["Expect"], + "100-continue") { + return + } + s.fnonce = new(sync.Once) + + // Arm the timer with a very large duration, which we'll + // intentionally lower later. It has to be large now because + // we need a handle to it before writing the headers, but the + // s.delay value is defined to not start until after the + // request headers were written. + const hugeDuration = 365 * 24 * time.Hour + s.timer = time.AfterFunc(hugeDuration, func() { + s.fnonce.Do(s.fn) + }) + return +} + +func (s bodyWriterState) cancel() { + if s.timer != nil { + s.timer.Stop() + } +} + +func (s bodyWriterState) on100() { + if s.timer == nil { + // If we didn't do a delayed write, ignore the server's + // bogus 100 continue response. + return + } + s.timer.Stop() + go func() { s.fnonce.Do(s.fn) }() +} + +// scheduleBodyWrite starts writing the body, either immediately (in +// the common case) or after the delay timeout. It should not be +// called until after the headers have been written. +func (s bodyWriterState) scheduleBodyWrite() { + if s.timer == nil { + // We're not doing a delayed write (see + // getBodyWriterState), so just start the writing + // goroutine immediately. + go s.fn() + return + } + traceWait100Continue(s.cs.trace) + if s.timer.Stop() { + s.timer.Reset(s.delay) + } +} + +// isConnectionCloseRequest reports whether req should use its own +// connection for a single request and then close the connection. +func isConnectionCloseRequest(req *http.Request) bool { + return req.Close || httplex.HeaderValuesContainsToken(req.Header["Connection"], "close") +} diff --git a/vendor/golang.org/x/net/http2/write.go b/vendor/golang.org/x/net/http2/write.go new file mode 100644 index 0000000..6b0dfae --- /dev/null +++ b/vendor/golang.org/x/net/http2/write.go @@ -0,0 +1,370 @@ +// Copyright 2014 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package http2 + +import ( + "bytes" + "fmt" + "log" + "net/http" + "net/url" + "time" + + "golang.org/x/net/http2/hpack" + "golang.org/x/net/lex/httplex" +) + +// writeFramer is implemented by any type that is used to write frames. +type writeFramer interface { + writeFrame(writeContext) error + + // staysWithinBuffer reports whether this writer promises that + // it will only write less than or equal to size bytes, and it + // won't Flush the write context. + staysWithinBuffer(size int) bool +} + +// writeContext is the interface needed by the various frame writer +// types below. All the writeFrame methods below are scheduled via the +// frame writing scheduler (see writeScheduler in writesched.go). +// +// This interface is implemented by *serverConn. +// +// TODO: decide whether to a) use this in the client code (which didn't +// end up using this yet, because it has a simpler design, not +// currently implementing priorities), or b) delete this and +// make the server code a bit more concrete. +type writeContext interface { + Framer() *Framer + Flush() error + CloseConn() error + // HeaderEncoder returns an HPACK encoder that writes to the + // returned buffer. + HeaderEncoder() (*hpack.Encoder, *bytes.Buffer) +} + +// writeEndsStream reports whether w writes a frame that will transition +// the stream to a half-closed local state. This returns false for RST_STREAM, +// which closes the entire stream (not just the local half). +func writeEndsStream(w writeFramer) bool { + switch v := w.(type) { + case *writeData: + return v.endStream + case *writeResHeaders: + return v.endStream + case nil: + // This can only happen if the caller reuses w after it's + // been intentionally nil'ed out to prevent use. Keep this + // here to catch future refactoring breaking it. + panic("writeEndsStream called on nil writeFramer") + } + return false +} + +type flushFrameWriter struct{} + +func (flushFrameWriter) writeFrame(ctx writeContext) error { + return ctx.Flush() +} + +func (flushFrameWriter) staysWithinBuffer(max int) bool { return false } + +type writeSettings []Setting + +func (s writeSettings) staysWithinBuffer(max int) bool { + const settingSize = 6 // uint16 + uint32 + return frameHeaderLen+settingSize*len(s) <= max + +} + +func (s writeSettings) writeFrame(ctx writeContext) error { + return ctx.Framer().WriteSettings([]Setting(s)...) +} + +type writeGoAway struct { + maxStreamID uint32 + code ErrCode +} + +func (p *writeGoAway) writeFrame(ctx writeContext) error { + err := ctx.Framer().WriteGoAway(p.maxStreamID, p.code, nil) + if p.code != 0 { + ctx.Flush() // ignore error: we're hanging up on them anyway + time.Sleep(50 * time.Millisecond) + ctx.CloseConn() + } + return err +} + +func (*writeGoAway) staysWithinBuffer(max int) bool { return false } // flushes + +type writeData struct { + streamID uint32 + p []byte + endStream bool +} + +func (w *writeData) String() string { + return fmt.Sprintf("writeData(stream=%d, p=%d, endStream=%v)", w.streamID, len(w.p), w.endStream) +} + +func (w *writeData) writeFrame(ctx writeContext) error { + return ctx.Framer().WriteData(w.streamID, w.endStream, w.p) +} + +func (w *writeData) staysWithinBuffer(max int) bool { + return frameHeaderLen+len(w.p) <= max +} + +// handlerPanicRST is the message sent from handler goroutines when +// the handler panics. +type handlerPanicRST struct { + StreamID uint32 +} + +func (hp handlerPanicRST) writeFrame(ctx writeContext) error { + return ctx.Framer().WriteRSTStream(hp.StreamID, ErrCodeInternal) +} + +func (hp handlerPanicRST) staysWithinBuffer(max int) bool { return frameHeaderLen+4 <= max } + +func (se StreamError) writeFrame(ctx writeContext) error { + return ctx.Framer().WriteRSTStream(se.StreamID, se.Code) +} + +func (se StreamError) staysWithinBuffer(max int) bool { return frameHeaderLen+4 <= max } + +type writePingAck struct{ pf *PingFrame } + +func (w writePingAck) writeFrame(ctx writeContext) error { + return ctx.Framer().WritePing(true, w.pf.Data) +} + +func (w writePingAck) staysWithinBuffer(max int) bool { return frameHeaderLen+len(w.pf.Data) <= max } + +type writeSettingsAck struct{} + +func (writeSettingsAck) writeFrame(ctx writeContext) error { + return ctx.Framer().WriteSettingsAck() +} + +func (writeSettingsAck) staysWithinBuffer(max int) bool { return frameHeaderLen <= max } + +// splitHeaderBlock splits headerBlock into fragments so that each fragment fits +// in a single frame, then calls fn for each fragment. firstFrag/lastFrag are true +// for the first/last fragment, respectively. +func splitHeaderBlock(ctx writeContext, headerBlock []byte, fn func(ctx writeContext, frag []byte, firstFrag, lastFrag bool) error) error { + // For now we're lazy and just pick the minimum MAX_FRAME_SIZE + // that all peers must support (16KB). Later we could care + // more and send larger frames if the peer advertised it, but + // there's little point. Most headers are small anyway (so we + // generally won't have CONTINUATION frames), and extra frames + // only waste 9 bytes anyway. + const maxFrameSize = 16384 + + first := true + for len(headerBlock) > 0 { + frag := headerBlock + if len(frag) > maxFrameSize { + frag = frag[:maxFrameSize] + } + headerBlock = headerBlock[len(frag):] + if err := fn(ctx, frag, first, len(headerBlock) == 0); err != nil { + return err + } + first = false + } + return nil +} + +// writeResHeaders is a request to write a HEADERS and 0+ CONTINUATION frames +// for HTTP response headers or trailers from a server handler. +type writeResHeaders struct { + streamID uint32 + httpResCode int // 0 means no ":status" line + h http.Header // may be nil + trailers []string // if non-nil, which keys of h to write. nil means all. + endStream bool + + date string + contentType string + contentLength string +} + +func encKV(enc *hpack.Encoder, k, v string) { + if VerboseLogs { + log.Printf("http2: server encoding header %q = %q", k, v) + } + enc.WriteField(hpack.HeaderField{Name: k, Value: v}) +} + +func (w *writeResHeaders) staysWithinBuffer(max int) bool { + // TODO: this is a common one. It'd be nice to return true + // here and get into the fast path if we could be clever and + // calculate the size fast enough, or at least a conservative + // uppper bound that usually fires. (Maybe if w.h and + // w.trailers are nil, so we don't need to enumerate it.) + // Otherwise I'm afraid that just calculating the length to + // answer this question would be slower than the ~2µs benefit. + return false +} + +func (w *writeResHeaders) writeFrame(ctx writeContext) error { + enc, buf := ctx.HeaderEncoder() + buf.Reset() + + if w.httpResCode != 0 { + encKV(enc, ":status", httpCodeString(w.httpResCode)) + } + + encodeHeaders(enc, w.h, w.trailers) + + if w.contentType != "" { + encKV(enc, "content-type", w.contentType) + } + if w.contentLength != "" { + encKV(enc, "content-length", w.contentLength) + } + if w.date != "" { + encKV(enc, "date", w.date) + } + + headerBlock := buf.Bytes() + if len(headerBlock) == 0 && w.trailers == nil { + panic("unexpected empty hpack") + } + + return splitHeaderBlock(ctx, headerBlock, w.writeHeaderBlock) +} + +func (w *writeResHeaders) writeHeaderBlock(ctx writeContext, frag []byte, firstFrag, lastFrag bool) error { + if firstFrag { + return ctx.Framer().WriteHeaders(HeadersFrameParam{ + StreamID: w.streamID, + BlockFragment: frag, + EndStream: w.endStream, + EndHeaders: lastFrag, + }) + } else { + return ctx.Framer().WriteContinuation(w.streamID, lastFrag, frag) + } +} + +// writePushPromise is a request to write a PUSH_PROMISE and 0+ CONTINUATION frames. +type writePushPromise struct { + streamID uint32 // pusher stream + method string // for :method + url *url.URL // for :scheme, :authority, :path + h http.Header + + // Creates an ID for a pushed stream. This runs on serveG just before + // the frame is written. The returned ID is copied to promisedID. + allocatePromisedID func() (uint32, error) + promisedID uint32 +} + +func (w *writePushPromise) staysWithinBuffer(max int) bool { + // TODO: see writeResHeaders.staysWithinBuffer + return false +} + +func (w *writePushPromise) writeFrame(ctx writeContext) error { + enc, buf := ctx.HeaderEncoder() + buf.Reset() + + encKV(enc, ":method", w.method) + encKV(enc, ":scheme", w.url.Scheme) + encKV(enc, ":authority", w.url.Host) + encKV(enc, ":path", w.url.RequestURI()) + encodeHeaders(enc, w.h, nil) + + headerBlock := buf.Bytes() + if len(headerBlock) == 0 { + panic("unexpected empty hpack") + } + + return splitHeaderBlock(ctx, headerBlock, w.writeHeaderBlock) +} + +func (w *writePushPromise) writeHeaderBlock(ctx writeContext, frag []byte, firstFrag, lastFrag bool) error { + if firstFrag { + return ctx.Framer().WritePushPromise(PushPromiseParam{ + StreamID: w.streamID, + PromiseID: w.promisedID, + BlockFragment: frag, + EndHeaders: lastFrag, + }) + } else { + return ctx.Framer().WriteContinuation(w.streamID, lastFrag, frag) + } +} + +type write100ContinueHeadersFrame struct { + streamID uint32 +} + +func (w write100ContinueHeadersFrame) writeFrame(ctx writeContext) error { + enc, buf := ctx.HeaderEncoder() + buf.Reset() + encKV(enc, ":status", "100") + return ctx.Framer().WriteHeaders(HeadersFrameParam{ + StreamID: w.streamID, + BlockFragment: buf.Bytes(), + EndStream: false, + EndHeaders: true, + }) +} + +func (w write100ContinueHeadersFrame) staysWithinBuffer(max int) bool { + // Sloppy but conservative: + return 9+2*(len(":status")+len("100")) <= max +} + +type writeWindowUpdate struct { + streamID uint32 // or 0 for conn-level + n uint32 +} + +func (wu writeWindowUpdate) staysWithinBuffer(max int) bool { return frameHeaderLen+4 <= max } + +func (wu writeWindowUpdate) writeFrame(ctx writeContext) error { + return ctx.Framer().WriteWindowUpdate(wu.streamID, wu.n) +} + +// encodeHeaders encodes an http.Header. If keys is not nil, then (k, h[k]) +// is encoded only only if k is in keys. +func encodeHeaders(enc *hpack.Encoder, h http.Header, keys []string) { + if keys == nil { + sorter := sorterPool.Get().(*sorter) + // Using defer here, since the returned keys from the + // sorter.Keys method is only valid until the sorter + // is returned: + defer sorterPool.Put(sorter) + keys = sorter.Keys(h) + } + for _, k := range keys { + vv := h[k] + k = lowerHeader(k) + if !validWireHeaderFieldName(k) { + // Skip it as backup paranoia. Per + // golang.org/issue/14048, these should + // already be rejected at a higher level. + continue + } + isTE := k == "transfer-encoding" + for _, v := range vv { + if !httplex.ValidHeaderFieldValue(v) { + // TODO: return an error? golang.org/issue/14048 + // For now just omit it. + continue + } + // TODO: more of "8.1.2.2 Connection-Specific Header Fields" + if isTE && v != "trailers" { + continue + } + encKV(enc, k, v) + } + } +} diff --git a/vendor/golang.org/x/net/http2/writesched.go b/vendor/golang.org/x/net/http2/writesched.go new file mode 100644 index 0000000..4fe3073 --- /dev/null +++ b/vendor/golang.org/x/net/http2/writesched.go @@ -0,0 +1,242 @@ +// Copyright 2014 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package http2 + +import "fmt" + +// WriteScheduler is the interface implemented by HTTP/2 write schedulers. +// Methods are never called concurrently. +type WriteScheduler interface { + // OpenStream opens a new stream in the write scheduler. + // It is illegal to call this with streamID=0 or with a streamID that is + // already open -- the call may panic. + OpenStream(streamID uint32, options OpenStreamOptions) + + // CloseStream closes a stream in the write scheduler. Any frames queued on + // this stream should be discarded. It is illegal to call this on a stream + // that is not open -- the call may panic. + CloseStream(streamID uint32) + + // AdjustStream adjusts the priority of the given stream. This may be called + // on a stream that has not yet been opened or has been closed. Note that + // RFC 7540 allows PRIORITY frames to be sent on streams in any state. See: + // https://tools.ietf.org/html/rfc7540#section-5.1 + AdjustStream(streamID uint32, priority PriorityParam) + + // Push queues a frame in the scheduler. In most cases, this will not be + // called with wr.StreamID()!=0 unless that stream is currently open. The one + // exception is RST_STREAM frames, which may be sent on idle or closed streams. + Push(wr FrameWriteRequest) + + // Pop dequeues the next frame to write. Returns false if no frames can + // be written. Frames with a given wr.StreamID() are Pop'd in the same + // order they are Push'd. + Pop() (wr FrameWriteRequest, ok bool) +} + +// OpenStreamOptions specifies extra options for WriteScheduler.OpenStream. +type OpenStreamOptions struct { + // PusherID is zero if the stream was initiated by the client. Otherwise, + // PusherID names the stream that pushed the newly opened stream. + PusherID uint32 +} + +// FrameWriteRequest is a request to write a frame. +type FrameWriteRequest struct { + // write is the interface value that does the writing, once the + // WriteScheduler has selected this frame to write. The write + // functions are all defined in write.go. + write writeFramer + + // stream is the stream on which this frame will be written. + // nil for non-stream frames like PING and SETTINGS. + stream *stream + + // done, if non-nil, must be a buffered channel with space for + // 1 message and is sent the return value from write (or an + // earlier error) when the frame has been written. + done chan error +} + +// StreamID returns the id of the stream this frame will be written to. +// 0 is used for non-stream frames such as PING and SETTINGS. +func (wr FrameWriteRequest) StreamID() uint32 { + if wr.stream == nil { + if se, ok := wr.write.(StreamError); ok { + // (*serverConn).resetStream doesn't set + // stream because it doesn't necessarily have + // one. So special case this type of write + // message. + return se.StreamID + } + return 0 + } + return wr.stream.id +} + +// DataSize returns the number of flow control bytes that must be consumed +// to write this entire frame. This is 0 for non-DATA frames. +func (wr FrameWriteRequest) DataSize() int { + if wd, ok := wr.write.(*writeData); ok { + return len(wd.p) + } + return 0 +} + +// Consume consumes min(n, available) bytes from this frame, where available +// is the number of flow control bytes available on the stream. Consume returns +// 0, 1, or 2 frames, where the integer return value gives the number of frames +// returned. +// +// If flow control prevents consuming any bytes, this returns (_, _, 0). If +// the entire frame was consumed, this returns (wr, _, 1). Otherwise, this +// returns (consumed, rest, 2), where 'consumed' contains the consumed bytes and +// 'rest' contains the remaining bytes. The consumed bytes are deducted from the +// underlying stream's flow control budget. +func (wr FrameWriteRequest) Consume(n int32) (FrameWriteRequest, FrameWriteRequest, int) { + var empty FrameWriteRequest + + // Non-DATA frames are always consumed whole. + wd, ok := wr.write.(*writeData) + if !ok || len(wd.p) == 0 { + return wr, empty, 1 + } + + // Might need to split after applying limits. + allowed := wr.stream.flow.available() + if n < allowed { + allowed = n + } + if wr.stream.sc.maxFrameSize < allowed { + allowed = wr.stream.sc.maxFrameSize + } + if allowed <= 0 { + return empty, empty, 0 + } + if len(wd.p) > int(allowed) { + wr.stream.flow.take(allowed) + consumed := FrameWriteRequest{ + stream: wr.stream, + write: &writeData{ + streamID: wd.streamID, + p: wd.p[:allowed], + // Even if the original had endStream set, there + // are bytes remaining because len(wd.p) > allowed, + // so we know endStream is false. + endStream: false, + }, + // Our caller is blocking on the final DATA frame, not + // this intermediate frame, so no need to wait. + done: nil, + } + rest := FrameWriteRequest{ + stream: wr.stream, + write: &writeData{ + streamID: wd.streamID, + p: wd.p[allowed:], + endStream: wd.endStream, + }, + done: wr.done, + } + return consumed, rest, 2 + } + + // The frame is consumed whole. + // NB: This cast cannot overflow because allowed is <= math.MaxInt32. + wr.stream.flow.take(int32(len(wd.p))) + return wr, empty, 1 +} + +// String is for debugging only. +func (wr FrameWriteRequest) String() string { + var des string + if s, ok := wr.write.(fmt.Stringer); ok { + des = s.String() + } else { + des = fmt.Sprintf("%T", wr.write) + } + return fmt.Sprintf("[FrameWriteRequest stream=%d, ch=%v, writer=%v]", wr.StreamID(), wr.done != nil, des) +} + +// replyToWriter sends err to wr.done and panics if the send must block +// This does nothing if wr.done is nil. +func (wr *FrameWriteRequest) replyToWriter(err error) { + if wr.done == nil { + return + } + select { + case wr.done <- err: + default: + panic(fmt.Sprintf("unbuffered done channel passed in for type %T", wr.write)) + } + wr.write = nil // prevent use (assume it's tainted after wr.done send) +} + +// writeQueue is used by implementations of WriteScheduler. +type writeQueue struct { + s []FrameWriteRequest +} + +func (q *writeQueue) empty() bool { return len(q.s) == 0 } + +func (q *writeQueue) push(wr FrameWriteRequest) { + q.s = append(q.s, wr) +} + +func (q *writeQueue) shift() FrameWriteRequest { + if len(q.s) == 0 { + panic("invalid use of queue") + } + wr := q.s[0] + // TODO: less copy-happy queue. + copy(q.s, q.s[1:]) + q.s[len(q.s)-1] = FrameWriteRequest{} + q.s = q.s[:len(q.s)-1] + return wr +} + +// consume consumes up to n bytes from q.s[0]. If the frame is +// entirely consumed, it is removed from the queue. If the frame +// is partially consumed, the frame is kept with the consumed +// bytes removed. Returns true iff any bytes were consumed. +func (q *writeQueue) consume(n int32) (FrameWriteRequest, bool) { + if len(q.s) == 0 { + return FrameWriteRequest{}, false + } + consumed, rest, numresult := q.s[0].Consume(n) + switch numresult { + case 0: + return FrameWriteRequest{}, false + case 1: + q.shift() + case 2: + q.s[0] = rest + } + return consumed, true +} + +type writeQueuePool []*writeQueue + +// put inserts an unused writeQueue into the pool. +func (p *writeQueuePool) put(q *writeQueue) { + for i := range q.s { + q.s[i] = FrameWriteRequest{} + } + q.s = q.s[:0] + *p = append(*p, q) +} + +// get returns an empty writeQueue. +func (p *writeQueuePool) get() *writeQueue { + ln := len(*p) + if ln == 0 { + return new(writeQueue) + } + x := ln - 1 + q := (*p)[x] + (*p)[x] = nil + *p = (*p)[:x] + return q +} diff --git a/vendor/golang.org/x/net/http2/writesched_priority.go b/vendor/golang.org/x/net/http2/writesched_priority.go new file mode 100644 index 0000000..0113272 --- /dev/null +++ b/vendor/golang.org/x/net/http2/writesched_priority.go @@ -0,0 +1,452 @@ +// Copyright 2016 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package http2 + +import ( + "fmt" + "math" + "sort" +) + +// RFC 7540, Section 5.3.5: the default weight is 16. +const priorityDefaultWeight = 15 // 16 = 15 + 1 + +// PriorityWriteSchedulerConfig configures a priorityWriteScheduler. +type PriorityWriteSchedulerConfig struct { + // MaxClosedNodesInTree controls the maximum number of closed streams to + // retain in the priority tree. Setting this to zero saves a small amount + // of memory at the cost of performance. + // + // See RFC 7540, Section 5.3.4: + // "It is possible for a stream to become closed while prioritization + // information ... is in transit. ... This potentially creates suboptimal + // prioritization, since the stream could be given a priority that is + // different from what is intended. To avoid these problems, an endpoint + // SHOULD retain stream prioritization state for a period after streams + // become closed. The longer state is retained, the lower the chance that + // streams are assigned incorrect or default priority values." + MaxClosedNodesInTree int + + // MaxIdleNodesInTree controls the maximum number of idle streams to + // retain in the priority tree. Setting this to zero saves a small amount + // of memory at the cost of performance. + // + // See RFC 7540, Section 5.3.4: + // Similarly, streams that are in the "idle" state can be assigned + // priority or become a parent of other streams. This allows for the + // creation of a grouping node in the dependency tree, which enables + // more flexible expressions of priority. Idle streams begin with a + // default priority (Section 5.3.5). + MaxIdleNodesInTree int + + // ThrottleOutOfOrderWrites enables write throttling to help ensure that + // data is delivered in priority order. This works around a race where + // stream B depends on stream A and both streams are about to call Write + // to queue DATA frames. If B wins the race, a naive scheduler would eagerly + // write as much data from B as possible, but this is suboptimal because A + // is a higher-priority stream. With throttling enabled, we write a small + // amount of data from B to minimize the amount of bandwidth that B can + // steal from A. + ThrottleOutOfOrderWrites bool +} + +// NewPriorityWriteScheduler constructs a WriteScheduler that schedules +// frames by following HTTP/2 priorities as described in RFC 7340 Section 5.3. +// If cfg is nil, default options are used. +func NewPriorityWriteScheduler(cfg *PriorityWriteSchedulerConfig) WriteScheduler { + if cfg == nil { + // For justification of these defaults, see: + // https://docs.google.com/document/d/1oLhNg1skaWD4_DtaoCxdSRN5erEXrH-KnLrMwEpOtFY + cfg = &PriorityWriteSchedulerConfig{ + MaxClosedNodesInTree: 10, + MaxIdleNodesInTree: 10, + ThrottleOutOfOrderWrites: false, + } + } + + ws := &priorityWriteScheduler{ + nodes: make(map[uint32]*priorityNode), + maxClosedNodesInTree: cfg.MaxClosedNodesInTree, + maxIdleNodesInTree: cfg.MaxIdleNodesInTree, + enableWriteThrottle: cfg.ThrottleOutOfOrderWrites, + } + ws.nodes[0] = &ws.root + if cfg.ThrottleOutOfOrderWrites { + ws.writeThrottleLimit = 1024 + } else { + ws.writeThrottleLimit = math.MaxInt32 + } + return ws +} + +type priorityNodeState int + +const ( + priorityNodeOpen priorityNodeState = iota + priorityNodeClosed + priorityNodeIdle +) + +// priorityNode is a node in an HTTP/2 priority tree. +// Each node is associated with a single stream ID. +// See RFC 7540, Section 5.3. +type priorityNode struct { + q writeQueue // queue of pending frames to write + id uint32 // id of the stream, or 0 for the root of the tree + weight uint8 // the actual weight is weight+1, so the value is in [1,256] + state priorityNodeState // open | closed | idle + bytes int64 // number of bytes written by this node, or 0 if closed + subtreeBytes int64 // sum(node.bytes) of all nodes in this subtree + + // These links form the priority tree. + parent *priorityNode + kids *priorityNode // start of the kids list + prev, next *priorityNode // doubly-linked list of siblings +} + +func (n *priorityNode) setParent(parent *priorityNode) { + if n == parent { + panic("setParent to self") + } + if n.parent == parent { + return + } + // Unlink from current parent. + if parent := n.parent; parent != nil { + if n.prev == nil { + parent.kids = n.next + } else { + n.prev.next = n.next + } + if n.next != nil { + n.next.prev = n.prev + } + } + // Link to new parent. + // If parent=nil, remove n from the tree. + // Always insert at the head of parent.kids (this is assumed by walkReadyInOrder). + n.parent = parent + if parent == nil { + n.next = nil + n.prev = nil + } else { + n.next = parent.kids + n.prev = nil + if n.next != nil { + n.next.prev = n + } + parent.kids = n + } +} + +func (n *priorityNode) addBytes(b int64) { + n.bytes += b + for ; n != nil; n = n.parent { + n.subtreeBytes += b + } +} + +// walkReadyInOrder iterates over the tree in priority order, calling f for each node +// with a non-empty write queue. When f returns true, this funcion returns true and the +// walk halts. tmp is used as scratch space for sorting. +// +// f(n, openParent) takes two arguments: the node to visit, n, and a bool that is true +// if any ancestor p of n is still open (ignoring the root node). +func (n *priorityNode) walkReadyInOrder(openParent bool, tmp *[]*priorityNode, f func(*priorityNode, bool) bool) bool { + if !n.q.empty() && f(n, openParent) { + return true + } + if n.kids == nil { + return false + } + + // Don't consider the root "open" when updating openParent since + // we can't send data frames on the root stream (only control frames). + if n.id != 0 { + openParent = openParent || (n.state == priorityNodeOpen) + } + + // Common case: only one kid or all kids have the same weight. + // Some clients don't use weights; other clients (like web browsers) + // use mostly-linear priority trees. + w := n.kids.weight + needSort := false + for k := n.kids.next; k != nil; k = k.next { + if k.weight != w { + needSort = true + break + } + } + if !needSort { + for k := n.kids; k != nil; k = k.next { + if k.walkReadyInOrder(openParent, tmp, f) { + return true + } + } + return false + } + + // Uncommon case: sort the child nodes. We remove the kids from the parent, + // then re-insert after sorting so we can reuse tmp for future sort calls. + *tmp = (*tmp)[:0] + for n.kids != nil { + *tmp = append(*tmp, n.kids) + n.kids.setParent(nil) + } + sort.Sort(sortPriorityNodeSiblings(*tmp)) + for i := len(*tmp) - 1; i >= 0; i-- { + (*tmp)[i].setParent(n) // setParent inserts at the head of n.kids + } + for k := n.kids; k != nil; k = k.next { + if k.walkReadyInOrder(openParent, tmp, f) { + return true + } + } + return false +} + +type sortPriorityNodeSiblings []*priorityNode + +func (z sortPriorityNodeSiblings) Len() int { return len(z) } +func (z sortPriorityNodeSiblings) Swap(i, k int) { z[i], z[k] = z[k], z[i] } +func (z sortPriorityNodeSiblings) Less(i, k int) bool { + // Prefer the subtree that has sent fewer bytes relative to its weight. + // See sections 5.3.2 and 5.3.4. + wi, bi := float64(z[i].weight+1), float64(z[i].subtreeBytes) + wk, bk := float64(z[k].weight+1), float64(z[k].subtreeBytes) + if bi == 0 && bk == 0 { + return wi >= wk + } + if bk == 0 { + return false + } + return bi/bk <= wi/wk +} + +type priorityWriteScheduler struct { + // root is the root of the priority tree, where root.id = 0. + // The root queues control frames that are not associated with any stream. + root priorityNode + + // nodes maps stream ids to priority tree nodes. + nodes map[uint32]*priorityNode + + // maxID is the maximum stream id in nodes. + maxID uint32 + + // lists of nodes that have been closed or are idle, but are kept in + // the tree for improved prioritization. When the lengths exceed either + // maxClosedNodesInTree or maxIdleNodesInTree, old nodes are discarded. + closedNodes, idleNodes []*priorityNode + + // From the config. + maxClosedNodesInTree int + maxIdleNodesInTree int + writeThrottleLimit int32 + enableWriteThrottle bool + + // tmp is scratch space for priorityNode.walkReadyInOrder to reduce allocations. + tmp []*priorityNode + + // pool of empty queues for reuse. + queuePool writeQueuePool +} + +func (ws *priorityWriteScheduler) OpenStream(streamID uint32, options OpenStreamOptions) { + // The stream may be currently idle but cannot be opened or closed. + if curr := ws.nodes[streamID]; curr != nil { + if curr.state != priorityNodeIdle { + panic(fmt.Sprintf("stream %d already opened", streamID)) + } + curr.state = priorityNodeOpen + return + } + + // RFC 7540, Section 5.3.5: + // "All streams are initially assigned a non-exclusive dependency on stream 0x0. + // Pushed streams initially depend on their associated stream. In both cases, + // streams are assigned a default weight of 16." + parent := ws.nodes[options.PusherID] + if parent == nil { + parent = &ws.root + } + n := &priorityNode{ + q: *ws.queuePool.get(), + id: streamID, + weight: priorityDefaultWeight, + state: priorityNodeOpen, + } + n.setParent(parent) + ws.nodes[streamID] = n + if streamID > ws.maxID { + ws.maxID = streamID + } +} + +func (ws *priorityWriteScheduler) CloseStream(streamID uint32) { + if streamID == 0 { + panic("violation of WriteScheduler interface: cannot close stream 0") + } + if ws.nodes[streamID] == nil { + panic(fmt.Sprintf("violation of WriteScheduler interface: unknown stream %d", streamID)) + } + if ws.nodes[streamID].state != priorityNodeOpen { + panic(fmt.Sprintf("violation of WriteScheduler interface: stream %d already closed", streamID)) + } + + n := ws.nodes[streamID] + n.state = priorityNodeClosed + n.addBytes(-n.bytes) + + q := n.q + ws.queuePool.put(&q) + n.q.s = nil + if ws.maxClosedNodesInTree > 0 { + ws.addClosedOrIdleNode(&ws.closedNodes, ws.maxClosedNodesInTree, n) + } else { + ws.removeNode(n) + } +} + +func (ws *priorityWriteScheduler) AdjustStream(streamID uint32, priority PriorityParam) { + if streamID == 0 { + panic("adjustPriority on root") + } + + // If streamID does not exist, there are two cases: + // - A closed stream that has been removed (this will have ID <= maxID) + // - An idle stream that is being used for "grouping" (this will have ID > maxID) + n := ws.nodes[streamID] + if n == nil { + if streamID <= ws.maxID || ws.maxIdleNodesInTree == 0 { + return + } + ws.maxID = streamID + n = &priorityNode{ + q: *ws.queuePool.get(), + id: streamID, + weight: priorityDefaultWeight, + state: priorityNodeIdle, + } + n.setParent(&ws.root) + ws.nodes[streamID] = n + ws.addClosedOrIdleNode(&ws.idleNodes, ws.maxIdleNodesInTree, n) + } + + // Section 5.3.1: A dependency on a stream that is not currently in the tree + // results in that stream being given a default priority (Section 5.3.5). + parent := ws.nodes[priority.StreamDep] + if parent == nil { + n.setParent(&ws.root) + n.weight = priorityDefaultWeight + return + } + + // Ignore if the client tries to make a node its own parent. + if n == parent { + return + } + + // Section 5.3.3: + // "If a stream is made dependent on one of its own dependencies, the + // formerly dependent stream is first moved to be dependent on the + // reprioritized stream's previous parent. The moved dependency retains + // its weight." + // + // That is: if parent depends on n, move parent to depend on n.parent. + for x := parent.parent; x != nil; x = x.parent { + if x == n { + parent.setParent(n.parent) + break + } + } + + // Section 5.3.3: The exclusive flag causes the stream to become the sole + // dependency of its parent stream, causing other dependencies to become + // dependent on the exclusive stream. + if priority.Exclusive { + k := parent.kids + for k != nil { + next := k.next + if k != n { + k.setParent(n) + } + k = next + } + } + + n.setParent(parent) + n.weight = priority.Weight +} + +func (ws *priorityWriteScheduler) Push(wr FrameWriteRequest) { + var n *priorityNode + if id := wr.StreamID(); id == 0 { + n = &ws.root + } else { + n = ws.nodes[id] + if n == nil { + // id is an idle or closed stream. wr should not be a HEADERS or + // DATA frame. However, wr can be a RST_STREAM. In this case, we + // push wr onto the root, rather than creating a new priorityNode, + // since RST_STREAM is tiny and the stream's priority is unknown + // anyway. See issue #17919. + if wr.DataSize() > 0 { + panic("add DATA on non-open stream") + } + n = &ws.root + } + } + n.q.push(wr) +} + +func (ws *priorityWriteScheduler) Pop() (wr FrameWriteRequest, ok bool) { + ws.root.walkReadyInOrder(false, &ws.tmp, func(n *priorityNode, openParent bool) bool { + limit := int32(math.MaxInt32) + if openParent { + limit = ws.writeThrottleLimit + } + wr, ok = n.q.consume(limit) + if !ok { + return false + } + n.addBytes(int64(wr.DataSize())) + // If B depends on A and B continuously has data available but A + // does not, gradually increase the throttling limit to allow B to + // steal more and more bandwidth from A. + if openParent { + ws.writeThrottleLimit += 1024 + if ws.writeThrottleLimit < 0 { + ws.writeThrottleLimit = math.MaxInt32 + } + } else if ws.enableWriteThrottle { + ws.writeThrottleLimit = 1024 + } + return true + }) + return wr, ok +} + +func (ws *priorityWriteScheduler) addClosedOrIdleNode(list *[]*priorityNode, maxSize int, n *priorityNode) { + if maxSize == 0 { + return + } + if len(*list) == maxSize { + // Remove the oldest node, then shift left. + ws.removeNode((*list)[0]) + x := (*list)[1:] + copy(*list, x) + *list = (*list)[:len(x)] + } + *list = append(*list, n) +} + +func (ws *priorityWriteScheduler) removeNode(n *priorityNode) { + for k := n.kids; k != nil; k = k.next { + k.setParent(n.parent) + } + n.setParent(nil) + delete(ws.nodes, n.id) +} diff --git a/vendor/golang.org/x/net/http2/writesched_random.go b/vendor/golang.org/x/net/http2/writesched_random.go new file mode 100644 index 0000000..36d7919 --- /dev/null +++ b/vendor/golang.org/x/net/http2/writesched_random.go @@ -0,0 +1,72 @@ +// Copyright 2014 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package http2 + +import "math" + +// NewRandomWriteScheduler constructs a WriteScheduler that ignores HTTP/2 +// priorities. Control frames like SETTINGS and PING are written before DATA +// frames, but if no control frames are queued and multiple streams have queued +// HEADERS or DATA frames, Pop selects a ready stream arbitrarily. +func NewRandomWriteScheduler() WriteScheduler { + return &randomWriteScheduler{sq: make(map[uint32]*writeQueue)} +} + +type randomWriteScheduler struct { + // zero are frames not associated with a specific stream. + zero writeQueue + + // sq contains the stream-specific queues, keyed by stream ID. + // When a stream is idle or closed, it's deleted from the map. + sq map[uint32]*writeQueue + + // pool of empty queues for reuse. + queuePool writeQueuePool +} + +func (ws *randomWriteScheduler) OpenStream(streamID uint32, options OpenStreamOptions) { + // no-op: idle streams are not tracked +} + +func (ws *randomWriteScheduler) CloseStream(streamID uint32) { + q, ok := ws.sq[streamID] + if !ok { + return + } + delete(ws.sq, streamID) + ws.queuePool.put(q) +} + +func (ws *randomWriteScheduler) AdjustStream(streamID uint32, priority PriorityParam) { + // no-op: priorities are ignored +} + +func (ws *randomWriteScheduler) Push(wr FrameWriteRequest) { + id := wr.StreamID() + if id == 0 { + ws.zero.push(wr) + return + } + q, ok := ws.sq[id] + if !ok { + q = ws.queuePool.get() + ws.sq[id] = q + } + q.push(wr) +} + +func (ws *randomWriteScheduler) Pop() (FrameWriteRequest, bool) { + // Control frames first. + if !ws.zero.empty() { + return ws.zero.shift(), true + } + // Iterate over all non-idle streams until finding one that can be consumed. + for _, q := range ws.sq { + if wr, ok := q.consume(math.MaxInt32); ok { + return wr, true + } + } + return FrameWriteRequest{}, false +} diff --git a/vendor/golang.org/x/net/idna/idna.go b/vendor/golang.org/x/net/idna/idna.go new file mode 100644 index 0000000..3daa897 --- /dev/null +++ b/vendor/golang.org/x/net/idna/idna.go @@ -0,0 +1,68 @@ +// Copyright 2012 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +// Package idna implements IDNA2008 (Internationalized Domain Names for +// Applications), defined in RFC 5890, RFC 5891, RFC 5892, RFC 5893 and +// RFC 5894. +package idna // import "golang.org/x/net/idna" + +import ( + "strings" + "unicode/utf8" +) + +// TODO(nigeltao): specify when errors occur. For example, is ToASCII(".") or +// ToASCII("foo\x00") an error? See also http://www.unicode.org/faq/idn.html#11 + +// acePrefix is the ASCII Compatible Encoding prefix. +const acePrefix = "xn--" + +// ToASCII converts a domain or domain label to its ASCII form. For example, +// ToASCII("bücher.example.com") is "xn--bcher-kva.example.com", and +// ToASCII("golang") is "golang". +func ToASCII(s string) (string, error) { + if ascii(s) { + return s, nil + } + labels := strings.Split(s, ".") + for i, label := range labels { + if !ascii(label) { + a, err := encode(acePrefix, label) + if err != nil { + return "", err + } + labels[i] = a + } + } + return strings.Join(labels, "."), nil +} + +// ToUnicode converts a domain or domain label to its Unicode form. For example, +// ToUnicode("xn--bcher-kva.example.com") is "bücher.example.com", and +// ToUnicode("golang") is "golang". +func ToUnicode(s string) (string, error) { + if !strings.Contains(s, acePrefix) { + return s, nil + } + labels := strings.Split(s, ".") + for i, label := range labels { + if strings.HasPrefix(label, acePrefix) { + u, err := decode(label[len(acePrefix):]) + if err != nil { + return "", err + } + labels[i] = u + } + } + return strings.Join(labels, "."), nil +} + +func ascii(s string) bool { + for i := 0; i < len(s); i++ { + if s[i] >= utf8.RuneSelf { + return false + } + } + return true +} diff --git a/vendor/golang.org/x/net/idna/punycode.go b/vendor/golang.org/x/net/idna/punycode.go new file mode 100644 index 0000000..92e733f --- /dev/null +++ b/vendor/golang.org/x/net/idna/punycode.go @@ -0,0 +1,200 @@ +// Copyright 2012 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package idna + +// This file implements the Punycode algorithm from RFC 3492. + +import ( + "fmt" + "math" + "strings" + "unicode/utf8" +) + +// These parameter values are specified in section 5. +// +// All computation is done with int32s, so that overflow behavior is identical +// regardless of whether int is 32-bit or 64-bit. +const ( + base int32 = 36 + damp int32 = 700 + initialBias int32 = 72 + initialN int32 = 128 + skew int32 = 38 + tmax int32 = 26 + tmin int32 = 1 +) + +// decode decodes a string as specified in section 6.2. +func decode(encoded string) (string, error) { + if encoded == "" { + return "", nil + } + pos := 1 + strings.LastIndex(encoded, "-") + if pos == 1 { + return "", fmt.Errorf("idna: invalid label %q", encoded) + } + if pos == len(encoded) { + return encoded[:len(encoded)-1], nil + } + output := make([]rune, 0, len(encoded)) + if pos != 0 { + for _, r := range encoded[:pos-1] { + output = append(output, r) + } + } + i, n, bias := int32(0), initialN, initialBias + for pos < len(encoded) { + oldI, w := i, int32(1) + for k := base; ; k += base { + if pos == len(encoded) { + return "", fmt.Errorf("idna: invalid label %q", encoded) + } + digit, ok := decodeDigit(encoded[pos]) + if !ok { + return "", fmt.Errorf("idna: invalid label %q", encoded) + } + pos++ + i += digit * w + if i < 0 { + return "", fmt.Errorf("idna: invalid label %q", encoded) + } + t := k - bias + if t < tmin { + t = tmin + } else if t > tmax { + t = tmax + } + if digit < t { + break + } + w *= base - t + if w >= math.MaxInt32/base { + return "", fmt.Errorf("idna: invalid label %q", encoded) + } + } + x := int32(len(output) + 1) + bias = adapt(i-oldI, x, oldI == 0) + n += i / x + i %= x + if n > utf8.MaxRune || len(output) >= 1024 { + return "", fmt.Errorf("idna: invalid label %q", encoded) + } + output = append(output, 0) + copy(output[i+1:], output[i:]) + output[i] = n + i++ + } + return string(output), nil +} + +// encode encodes a string as specified in section 6.3 and prepends prefix to +// the result. +// +// The "while h < length(input)" line in the specification becomes "for +// remaining != 0" in the Go code, because len(s) in Go is in bytes, not runes. +func encode(prefix, s string) (string, error) { + output := make([]byte, len(prefix), len(prefix)+1+2*len(s)) + copy(output, prefix) + delta, n, bias := int32(0), initialN, initialBias + b, remaining := int32(0), int32(0) + for _, r := range s { + if r < 0x80 { + b++ + output = append(output, byte(r)) + } else { + remaining++ + } + } + h := b + if b > 0 { + output = append(output, '-') + } + for remaining != 0 { + m := int32(0x7fffffff) + for _, r := range s { + if m > r && r >= n { + m = r + } + } + delta += (m - n) * (h + 1) + if delta < 0 { + return "", fmt.Errorf("idna: invalid label %q", s) + } + n = m + for _, r := range s { + if r < n { + delta++ + if delta < 0 { + return "", fmt.Errorf("idna: invalid label %q", s) + } + continue + } + if r > n { + continue + } + q := delta + for k := base; ; k += base { + t := k - bias + if t < tmin { + t = tmin + } else if t > tmax { + t = tmax + } + if q < t { + break + } + output = append(output, encodeDigit(t+(q-t)%(base-t))) + q = (q - t) / (base - t) + } + output = append(output, encodeDigit(q)) + bias = adapt(delta, h+1, h == b) + delta = 0 + h++ + remaining-- + } + delta++ + n++ + } + return string(output), nil +} + +func decodeDigit(x byte) (digit int32, ok bool) { + switch { + case '0' <= x && x <= '9': + return int32(x - ('0' - 26)), true + case 'A' <= x && x <= 'Z': + return int32(x - 'A'), true + case 'a' <= x && x <= 'z': + return int32(x - 'a'), true + } + return 0, false +} + +func encodeDigit(digit int32) byte { + switch { + case 0 <= digit && digit < 26: + return byte(digit + 'a') + case 26 <= digit && digit < 36: + return byte(digit + ('0' - 26)) + } + panic("idna: internal error in punycode encoding") +} + +// adapt is the bias adaptation function specified in section 6.1. +func adapt(delta, numPoints int32, firstTime bool) int32 { + if firstTime { + delta /= damp + } else { + delta /= 2 + } + delta += delta / numPoints + k := int32(0) + for delta > ((base-tmin)*tmax)/2 { + delta /= base - tmin + k += base + } + return k + (base-tmin+1)*delta/(delta+skew) +} diff --git a/vendor/golang.org/x/net/internal/timeseries/timeseries.go b/vendor/golang.org/x/net/internal/timeseries/timeseries.go new file mode 100644 index 0000000..1119f34 --- /dev/null +++ b/vendor/golang.org/x/net/internal/timeseries/timeseries.go @@ -0,0 +1,525 @@ +// Copyright 2015 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +// Package timeseries implements a time series structure for stats collection. +package timeseries // import "golang.org/x/net/internal/timeseries" + +import ( + "fmt" + "log" + "time" +) + +const ( + timeSeriesNumBuckets = 64 + minuteHourSeriesNumBuckets = 60 +) + +var timeSeriesResolutions = []time.Duration{ + 1 * time.Second, + 10 * time.Second, + 1 * time.Minute, + 10 * time.Minute, + 1 * time.Hour, + 6 * time.Hour, + 24 * time.Hour, // 1 day + 7 * 24 * time.Hour, // 1 week + 4 * 7 * 24 * time.Hour, // 4 weeks + 16 * 7 * 24 * time.Hour, // 16 weeks +} + +var minuteHourSeriesResolutions = []time.Duration{ + 1 * time.Second, + 1 * time.Minute, +} + +// An Observable is a kind of data that can be aggregated in a time series. +type Observable interface { + Multiply(ratio float64) // Multiplies the data in self by a given ratio + Add(other Observable) // Adds the data from a different observation to self + Clear() // Clears the observation so it can be reused. + CopyFrom(other Observable) // Copies the contents of a given observation to self +} + +// Float attaches the methods of Observable to a float64. +type Float float64 + +// NewFloat returns a Float. +func NewFloat() Observable { + f := Float(0) + return &f +} + +// String returns the float as a string. +func (f *Float) String() string { return fmt.Sprintf("%g", f.Value()) } + +// Value returns the float's value. +func (f *Float) Value() float64 { return float64(*f) } + +func (f *Float) Multiply(ratio float64) { *f *= Float(ratio) } + +func (f *Float) Add(other Observable) { + o := other.(*Float) + *f += *o +} + +func (f *Float) Clear() { *f = 0 } + +func (f *Float) CopyFrom(other Observable) { + o := other.(*Float) + *f = *o +} + +// A Clock tells the current time. +type Clock interface { + Time() time.Time +} + +type defaultClock int + +var defaultClockInstance defaultClock + +func (defaultClock) Time() time.Time { return time.Now() } + +// Information kept per level. Each level consists of a circular list of +// observations. The start of the level may be derived from end and the +// len(buckets) * sizeInMillis. +type tsLevel struct { + oldest int // index to oldest bucketed Observable + newest int // index to newest bucketed Observable + end time.Time // end timestamp for this level + size time.Duration // duration of the bucketed Observable + buckets []Observable // collections of observations + provider func() Observable // used for creating new Observable +} + +func (l *tsLevel) Clear() { + l.oldest = 0 + l.newest = len(l.buckets) - 1 + l.end = time.Time{} + for i := range l.buckets { + if l.buckets[i] != nil { + l.buckets[i].Clear() + l.buckets[i] = nil + } + } +} + +func (l *tsLevel) InitLevel(size time.Duration, numBuckets int, f func() Observable) { + l.size = size + l.provider = f + l.buckets = make([]Observable, numBuckets) +} + +// Keeps a sequence of levels. Each level is responsible for storing data at +// a given resolution. For example, the first level stores data at a one +// minute resolution while the second level stores data at a one hour +// resolution. + +// Each level is represented by a sequence of buckets. Each bucket spans an +// interval equal to the resolution of the level. New observations are added +// to the last bucket. +type timeSeries struct { + provider func() Observable // make more Observable + numBuckets int // number of buckets in each level + levels []*tsLevel // levels of bucketed Observable + lastAdd time.Time // time of last Observable tracked + total Observable // convenient aggregation of all Observable + clock Clock // Clock for getting current time + pending Observable // observations not yet bucketed + pendingTime time.Time // what time are we keeping in pending + dirty bool // if there are pending observations +} + +// init initializes a level according to the supplied criteria. +func (ts *timeSeries) init(resolutions []time.Duration, f func() Observable, numBuckets int, clock Clock) { + ts.provider = f + ts.numBuckets = numBuckets + ts.clock = clock + ts.levels = make([]*tsLevel, len(resolutions)) + + for i := range resolutions { + if i > 0 && resolutions[i-1] >= resolutions[i] { + log.Print("timeseries: resolutions must be monotonically increasing") + break + } + newLevel := new(tsLevel) + newLevel.InitLevel(resolutions[i], ts.numBuckets, ts.provider) + ts.levels[i] = newLevel + } + + ts.Clear() +} + +// Clear removes all observations from the time series. +func (ts *timeSeries) Clear() { + ts.lastAdd = time.Time{} + ts.total = ts.resetObservation(ts.total) + ts.pending = ts.resetObservation(ts.pending) + ts.pendingTime = time.Time{} + ts.dirty = false + + for i := range ts.levels { + ts.levels[i].Clear() + } +} + +// Add records an observation at the current time. +func (ts *timeSeries) Add(observation Observable) { + ts.AddWithTime(observation, ts.clock.Time()) +} + +// AddWithTime records an observation at the specified time. +func (ts *timeSeries) AddWithTime(observation Observable, t time.Time) { + + smallBucketDuration := ts.levels[0].size + + if t.After(ts.lastAdd) { + ts.lastAdd = t + } + + if t.After(ts.pendingTime) { + ts.advance(t) + ts.mergePendingUpdates() + ts.pendingTime = ts.levels[0].end + ts.pending.CopyFrom(observation) + ts.dirty = true + } else if t.After(ts.pendingTime.Add(-1 * smallBucketDuration)) { + // The observation is close enough to go into the pending bucket. + // This compensates for clock skewing and small scheduling delays + // by letting the update stay in the fast path. + ts.pending.Add(observation) + ts.dirty = true + } else { + ts.mergeValue(observation, t) + } +} + +// mergeValue inserts the observation at the specified time in the past into all levels. +func (ts *timeSeries) mergeValue(observation Observable, t time.Time) { + for _, level := range ts.levels { + index := (ts.numBuckets - 1) - int(level.end.Sub(t)/level.size) + if 0 <= index && index < ts.numBuckets { + bucketNumber := (level.oldest + index) % ts.numBuckets + if level.buckets[bucketNumber] == nil { + level.buckets[bucketNumber] = level.provider() + } + level.buckets[bucketNumber].Add(observation) + } + } + ts.total.Add(observation) +} + +// mergePendingUpdates applies the pending updates into all levels. +func (ts *timeSeries) mergePendingUpdates() { + if ts.dirty { + ts.mergeValue(ts.pending, ts.pendingTime) + ts.pending = ts.resetObservation(ts.pending) + ts.dirty = false + } +} + +// advance cycles the buckets at each level until the latest bucket in +// each level can hold the time specified. +func (ts *timeSeries) advance(t time.Time) { + if !t.After(ts.levels[0].end) { + return + } + for i := 0; i < len(ts.levels); i++ { + level := ts.levels[i] + if !level.end.Before(t) { + break + } + + // If the time is sufficiently far, just clear the level and advance + // directly. + if !t.Before(level.end.Add(level.size * time.Duration(ts.numBuckets))) { + for _, b := range level.buckets { + ts.resetObservation(b) + } + level.end = time.Unix(0, (t.UnixNano()/level.size.Nanoseconds())*level.size.Nanoseconds()) + } + + for t.After(level.end) { + level.end = level.end.Add(level.size) + level.newest = level.oldest + level.oldest = (level.oldest + 1) % ts.numBuckets + ts.resetObservation(level.buckets[level.newest]) + } + + t = level.end + } +} + +// Latest returns the sum of the num latest buckets from the level. +func (ts *timeSeries) Latest(level, num int) Observable { + now := ts.clock.Time() + if ts.levels[0].end.Before(now) { + ts.advance(now) + } + + ts.mergePendingUpdates() + + result := ts.provider() + l := ts.levels[level] + index := l.newest + + for i := 0; i < num; i++ { + if l.buckets[index] != nil { + result.Add(l.buckets[index]) + } + if index == 0 { + index = ts.numBuckets + } + index-- + } + + return result +} + +// LatestBuckets returns a copy of the num latest buckets from level. +func (ts *timeSeries) LatestBuckets(level, num int) []Observable { + if level < 0 || level > len(ts.levels) { + log.Print("timeseries: bad level argument: ", level) + return nil + } + if num < 0 || num >= ts.numBuckets { + log.Print("timeseries: bad num argument: ", num) + return nil + } + + results := make([]Observable, num) + now := ts.clock.Time() + if ts.levels[0].end.Before(now) { + ts.advance(now) + } + + ts.mergePendingUpdates() + + l := ts.levels[level] + index := l.newest + + for i := 0; i < num; i++ { + result := ts.provider() + results[i] = result + if l.buckets[index] != nil { + result.CopyFrom(l.buckets[index]) + } + + if index == 0 { + index = ts.numBuckets + } + index -= 1 + } + return results +} + +// ScaleBy updates observations by scaling by factor. +func (ts *timeSeries) ScaleBy(factor float64) { + for _, l := range ts.levels { + for i := 0; i < ts.numBuckets; i++ { + l.buckets[i].Multiply(factor) + } + } + + ts.total.Multiply(factor) + ts.pending.Multiply(factor) +} + +// Range returns the sum of observations added over the specified time range. +// If start or finish times don't fall on bucket boundaries of the same +// level, then return values are approximate answers. +func (ts *timeSeries) Range(start, finish time.Time) Observable { + return ts.ComputeRange(start, finish, 1)[0] +} + +// Recent returns the sum of observations from the last delta. +func (ts *timeSeries) Recent(delta time.Duration) Observable { + now := ts.clock.Time() + return ts.Range(now.Add(-delta), now) +} + +// Total returns the total of all observations. +func (ts *timeSeries) Total() Observable { + ts.mergePendingUpdates() + return ts.total +} + +// ComputeRange computes a specified number of values into a slice using +// the observations recorded over the specified time period. The return +// values are approximate if the start or finish times don't fall on the +// bucket boundaries at the same level or if the number of buckets spanning +// the range is not an integral multiple of num. +func (ts *timeSeries) ComputeRange(start, finish time.Time, num int) []Observable { + if start.After(finish) { + log.Printf("timeseries: start > finish, %v>%v", start, finish) + return nil + } + + if num < 0 { + log.Printf("timeseries: num < 0, %v", num) + return nil + } + + results := make([]Observable, num) + + for _, l := range ts.levels { + if !start.Before(l.end.Add(-l.size * time.Duration(ts.numBuckets))) { + ts.extract(l, start, finish, num, results) + return results + } + } + + // Failed to find a level that covers the desired range. So just + // extract from the last level, even if it doesn't cover the entire + // desired range. + ts.extract(ts.levels[len(ts.levels)-1], start, finish, num, results) + + return results +} + +// RecentList returns the specified number of values in slice over the most +// recent time period of the specified range. +func (ts *timeSeries) RecentList(delta time.Duration, num int) []Observable { + if delta < 0 { + return nil + } + now := ts.clock.Time() + return ts.ComputeRange(now.Add(-delta), now, num) +} + +// extract returns a slice of specified number of observations from a given +// level over a given range. +func (ts *timeSeries) extract(l *tsLevel, start, finish time.Time, num int, results []Observable) { + ts.mergePendingUpdates() + + srcInterval := l.size + dstInterval := finish.Sub(start) / time.Duration(num) + dstStart := start + srcStart := l.end.Add(-srcInterval * time.Duration(ts.numBuckets)) + + srcIndex := 0 + + // Where should scanning start? + if dstStart.After(srcStart) { + advance := dstStart.Sub(srcStart) / srcInterval + srcIndex += int(advance) + srcStart = srcStart.Add(advance * srcInterval) + } + + // The i'th value is computed as show below. + // interval = (finish/start)/num + // i'th value = sum of observation in range + // [ start + i * interval, + // start + (i + 1) * interval ) + for i := 0; i < num; i++ { + results[i] = ts.resetObservation(results[i]) + dstEnd := dstStart.Add(dstInterval) + for srcIndex < ts.numBuckets && srcStart.Before(dstEnd) { + srcEnd := srcStart.Add(srcInterval) + if srcEnd.After(ts.lastAdd) { + srcEnd = ts.lastAdd + } + + if !srcEnd.Before(dstStart) { + srcValue := l.buckets[(srcIndex+l.oldest)%ts.numBuckets] + if !srcStart.Before(dstStart) && !srcEnd.After(dstEnd) { + // dst completely contains src. + if srcValue != nil { + results[i].Add(srcValue) + } + } else { + // dst partially overlaps src. + overlapStart := maxTime(srcStart, dstStart) + overlapEnd := minTime(srcEnd, dstEnd) + base := srcEnd.Sub(srcStart) + fraction := overlapEnd.Sub(overlapStart).Seconds() / base.Seconds() + + used := ts.provider() + if srcValue != nil { + used.CopyFrom(srcValue) + } + used.Multiply(fraction) + results[i].Add(used) + } + + if srcEnd.After(dstEnd) { + break + } + } + srcIndex++ + srcStart = srcStart.Add(srcInterval) + } + dstStart = dstStart.Add(dstInterval) + } +} + +// resetObservation clears the content so the struct may be reused. +func (ts *timeSeries) resetObservation(observation Observable) Observable { + if observation == nil { + observation = ts.provider() + } else { + observation.Clear() + } + return observation +} + +// TimeSeries tracks data at granularities from 1 second to 16 weeks. +type TimeSeries struct { + timeSeries +} + +// NewTimeSeries creates a new TimeSeries using the function provided for creating new Observable. +func NewTimeSeries(f func() Observable) *TimeSeries { + return NewTimeSeriesWithClock(f, defaultClockInstance) +} + +// NewTimeSeriesWithClock creates a new TimeSeries using the function provided for creating new Observable and the clock for +// assigning timestamps. +func NewTimeSeriesWithClock(f func() Observable, clock Clock) *TimeSeries { + ts := new(TimeSeries) + ts.timeSeries.init(timeSeriesResolutions, f, timeSeriesNumBuckets, clock) + return ts +} + +// MinuteHourSeries tracks data at granularities of 1 minute and 1 hour. +type MinuteHourSeries struct { + timeSeries +} + +// NewMinuteHourSeries creates a new MinuteHourSeries using the function provided for creating new Observable. +func NewMinuteHourSeries(f func() Observable) *MinuteHourSeries { + return NewMinuteHourSeriesWithClock(f, defaultClockInstance) +} + +// NewMinuteHourSeriesWithClock creates a new MinuteHourSeries using the function provided for creating new Observable and the clock for +// assigning timestamps. +func NewMinuteHourSeriesWithClock(f func() Observable, clock Clock) *MinuteHourSeries { + ts := new(MinuteHourSeries) + ts.timeSeries.init(minuteHourSeriesResolutions, f, + minuteHourSeriesNumBuckets, clock) + return ts +} + +func (ts *MinuteHourSeries) Minute() Observable { + return ts.timeSeries.Latest(0, 60) +} + +func (ts *MinuteHourSeries) Hour() Observable { + return ts.timeSeries.Latest(1, 60) +} + +func minTime(a, b time.Time) time.Time { + if a.Before(b) { + return a + } + return b +} + +func maxTime(a, b time.Time) time.Time { + if a.After(b) { + return a + } + return b +} diff --git a/vendor/golang.org/x/net/lex/httplex/httplex.go b/vendor/golang.org/x/net/lex/httplex/httplex.go new file mode 100644 index 0000000..20f2b89 --- /dev/null +++ b/vendor/golang.org/x/net/lex/httplex/httplex.go @@ -0,0 +1,351 @@ +// Copyright 2016 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +// Package httplex contains rules around lexical matters of various +// HTTP-related specifications. +// +// This package is shared by the standard library (which vendors it) +// and x/net/http2. It comes with no API stability promise. +package httplex + +import ( + "net" + "strings" + "unicode/utf8" + + "golang.org/x/net/idna" +) + +var isTokenTable = [127]bool{ + '!': true, + '#': true, + '$': true, + '%': true, + '&': true, + '\'': true, + '*': true, + '+': true, + '-': true, + '.': true, + '0': true, + '1': true, + '2': true, + '3': true, + '4': true, + '5': true, + '6': true, + '7': true, + '8': true, + '9': true, + 'A': true, + 'B': true, + 'C': true, + 'D': true, + 'E': true, + 'F': true, + 'G': true, + 'H': true, + 'I': true, + 'J': true, + 'K': true, + 'L': true, + 'M': true, + 'N': true, + 'O': true, + 'P': true, + 'Q': true, + 'R': true, + 'S': true, + 'T': true, + 'U': true, + 'W': true, + 'V': true, + 'X': true, + 'Y': true, + 'Z': true, + '^': true, + '_': true, + '`': true, + 'a': true, + 'b': true, + 'c': true, + 'd': true, + 'e': true, + 'f': true, + 'g': true, + 'h': true, + 'i': true, + 'j': true, + 'k': true, + 'l': true, + 'm': true, + 'n': true, + 'o': true, + 'p': true, + 'q': true, + 'r': true, + 's': true, + 't': true, + 'u': true, + 'v': true, + 'w': true, + 'x': true, + 'y': true, + 'z': true, + '|': true, + '~': true, +} + +func IsTokenRune(r rune) bool { + i := int(r) + return i < len(isTokenTable) && isTokenTable[i] +} + +func isNotToken(r rune) bool { + return !IsTokenRune(r) +} + +// HeaderValuesContainsToken reports whether any string in values +// contains the provided token, ASCII case-insensitively. +func HeaderValuesContainsToken(values []string, token string) bool { + for _, v := range values { + if headerValueContainsToken(v, token) { + return true + } + } + return false +} + +// isOWS reports whether b is an optional whitespace byte, as defined +// by RFC 7230 section 3.2.3. +func isOWS(b byte) bool { return b == ' ' || b == '\t' } + +// trimOWS returns x with all optional whitespace removes from the +// beginning and end. +func trimOWS(x string) string { + // TODO: consider using strings.Trim(x, " \t") instead, + // if and when it's fast enough. See issue 10292. + // But this ASCII-only code will probably always beat UTF-8 + // aware code. + for len(x) > 0 && isOWS(x[0]) { + x = x[1:] + } + for len(x) > 0 && isOWS(x[len(x)-1]) { + x = x[:len(x)-1] + } + return x +} + +// headerValueContainsToken reports whether v (assumed to be a +// 0#element, in the ABNF extension described in RFC 7230 section 7) +// contains token amongst its comma-separated tokens, ASCII +// case-insensitively. +func headerValueContainsToken(v string, token string) bool { + v = trimOWS(v) + if comma := strings.IndexByte(v, ','); comma != -1 { + return tokenEqual(trimOWS(v[:comma]), token) || headerValueContainsToken(v[comma+1:], token) + } + return tokenEqual(v, token) +} + +// lowerASCII returns the ASCII lowercase version of b. +func lowerASCII(b byte) byte { + if 'A' <= b && b <= 'Z' { + return b + ('a' - 'A') + } + return b +} + +// tokenEqual reports whether t1 and t2 are equal, ASCII case-insensitively. +func tokenEqual(t1, t2 string) bool { + if len(t1) != len(t2) { + return false + } + for i, b := range t1 { + if b >= utf8.RuneSelf { + // No UTF-8 or non-ASCII allowed in tokens. + return false + } + if lowerASCII(byte(b)) != lowerASCII(t2[i]) { + return false + } + } + return true +} + +// isLWS reports whether b is linear white space, according +// to http://www.w3.org/Protocols/rfc2616/rfc2616-sec2.html#sec2.2 +// LWS = [CRLF] 1*( SP | HT ) +func isLWS(b byte) bool { return b == ' ' || b == '\t' } + +// isCTL reports whether b is a control byte, according +// to http://www.w3.org/Protocols/rfc2616/rfc2616-sec2.html#sec2.2 +// CTL = +func isCTL(b byte) bool { + const del = 0x7f // a CTL + return b < ' ' || b == del +} + +// ValidHeaderFieldName reports whether v is a valid HTTP/1.x header name. +// HTTP/2 imposes the additional restriction that uppercase ASCII +// letters are not allowed. +// +// RFC 7230 says: +// header-field = field-name ":" OWS field-value OWS +// field-name = token +// token = 1*tchar +// tchar = "!" / "#" / "$" / "%" / "&" / "'" / "*" / "+" / "-" / "." / +// "^" / "_" / "`" / "|" / "~" / DIGIT / ALPHA +func ValidHeaderFieldName(v string) bool { + if len(v) == 0 { + return false + } + for _, r := range v { + if !IsTokenRune(r) { + return false + } + } + return true +} + +// ValidHostHeader reports whether h is a valid host header. +func ValidHostHeader(h string) bool { + // The latest spec is actually this: + // + // http://tools.ietf.org/html/rfc7230#section-5.4 + // Host = uri-host [ ":" port ] + // + // Where uri-host is: + // http://tools.ietf.org/html/rfc3986#section-3.2.2 + // + // But we're going to be much more lenient for now and just + // search for any byte that's not a valid byte in any of those + // expressions. + for i := 0; i < len(h); i++ { + if !validHostByte[h[i]] { + return false + } + } + return true +} + +// See the validHostHeader comment. +var validHostByte = [256]bool{ + '0': true, '1': true, '2': true, '3': true, '4': true, '5': true, '6': true, '7': true, + '8': true, '9': true, + + 'a': true, 'b': true, 'c': true, 'd': true, 'e': true, 'f': true, 'g': true, 'h': true, + 'i': true, 'j': true, 'k': true, 'l': true, 'm': true, 'n': true, 'o': true, 'p': true, + 'q': true, 'r': true, 's': true, 't': true, 'u': true, 'v': true, 'w': true, 'x': true, + 'y': true, 'z': true, + + 'A': true, 'B': true, 'C': true, 'D': true, 'E': true, 'F': true, 'G': true, 'H': true, + 'I': true, 'J': true, 'K': true, 'L': true, 'M': true, 'N': true, 'O': true, 'P': true, + 'Q': true, 'R': true, 'S': true, 'T': true, 'U': true, 'V': true, 'W': true, 'X': true, + 'Y': true, 'Z': true, + + '!': true, // sub-delims + '$': true, // sub-delims + '%': true, // pct-encoded (and used in IPv6 zones) + '&': true, // sub-delims + '(': true, // sub-delims + ')': true, // sub-delims + '*': true, // sub-delims + '+': true, // sub-delims + ',': true, // sub-delims + '-': true, // unreserved + '.': true, // unreserved + ':': true, // IPv6address + Host expression's optional port + ';': true, // sub-delims + '=': true, // sub-delims + '[': true, + '\'': true, // sub-delims + ']': true, + '_': true, // unreserved + '~': true, // unreserved +} + +// ValidHeaderFieldValue reports whether v is a valid "field-value" according to +// http://www.w3.org/Protocols/rfc2616/rfc2616-sec4.html#sec4.2 : +// +// message-header = field-name ":" [ field-value ] +// field-value = *( field-content | LWS ) +// field-content = +// +// http://www.w3.org/Protocols/rfc2616/rfc2616-sec2.html#sec2.2 : +// +// TEXT = +// LWS = [CRLF] 1*( SP | HT ) +// CTL = +// +// RFC 7230 says: +// field-value = *( field-content / obs-fold ) +// obj-fold = N/A to http2, and deprecated +// field-content = field-vchar [ 1*( SP / HTAB ) field-vchar ] +// field-vchar = VCHAR / obs-text +// obs-text = %x80-FF +// VCHAR = "any visible [USASCII] character" +// +// http2 further says: "Similarly, HTTP/2 allows header field values +// that are not valid. While most of the values that can be encoded +// will not alter header field parsing, carriage return (CR, ASCII +// 0xd), line feed (LF, ASCII 0xa), and the zero character (NUL, ASCII +// 0x0) might be exploited by an attacker if they are translated +// verbatim. Any request or response that contains a character not +// permitted in a header field value MUST be treated as malformed +// (Section 8.1.2.6). Valid characters are defined by the +// field-content ABNF rule in Section 3.2 of [RFC7230]." +// +// This function does not (yet?) properly handle the rejection of +// strings that begin or end with SP or HTAB. +func ValidHeaderFieldValue(v string) bool { + for i := 0; i < len(v); i++ { + b := v[i] + if isCTL(b) && !isLWS(b) { + return false + } + } + return true +} + +func isASCII(s string) bool { + for i := 0; i < len(s); i++ { + if s[i] >= utf8.RuneSelf { + return false + } + } + return true +} + +// PunycodeHostPort returns the IDNA Punycode version +// of the provided "host" or "host:port" string. +func PunycodeHostPort(v string) (string, error) { + if isASCII(v) { + return v, nil + } + + host, port, err := net.SplitHostPort(v) + if err != nil { + // The input 'v' argument was just a "host" argument, + // without a port. This error should not be returned + // to the caller. + host = v + port = "" + } + host, err = idna.ToASCII(host) + if err != nil { + // Non-UTF-8? Not representable in Punycode, in any + // case. + return "", err + } + if port == "" { + return host, nil + } + return net.JoinHostPort(host, port), nil +} diff --git a/vendor/golang.org/x/net/trace/events.go b/vendor/golang.org/x/net/trace/events.go new file mode 100644 index 0000000..d8daec1 --- /dev/null +++ b/vendor/golang.org/x/net/trace/events.go @@ -0,0 +1,532 @@ +// Copyright 2015 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package trace + +import ( + "bytes" + "fmt" + "html/template" + "io" + "log" + "net/http" + "runtime" + "sort" + "strconv" + "strings" + "sync" + "sync/atomic" + "text/tabwriter" + "time" +) + +const maxEventsPerLog = 100 + +type bucket struct { + MaxErrAge time.Duration + String string +} + +var buckets = []bucket{ + {0, "total"}, + {10 * time.Second, "errs<10s"}, + {1 * time.Minute, "errs<1m"}, + {10 * time.Minute, "errs<10m"}, + {1 * time.Hour, "errs<1h"}, + {10 * time.Hour, "errs<10h"}, + {24000 * time.Hour, "errors"}, +} + +// RenderEvents renders the HTML page typically served at /debug/events. +// It does not do any auth checking; see AuthRequest for the default auth check +// used by the handler registered on http.DefaultServeMux. +// req may be nil. +func RenderEvents(w http.ResponseWriter, req *http.Request, sensitive bool) { + now := time.Now() + data := &struct { + Families []string // family names + Buckets []bucket + Counts [][]int // eventLog count per family/bucket + + // Set when a bucket has been selected. + Family string + Bucket int + EventLogs eventLogs + Expanded bool + }{ + Buckets: buckets, + } + + data.Families = make([]string, 0, len(families)) + famMu.RLock() + for name := range families { + data.Families = append(data.Families, name) + } + famMu.RUnlock() + sort.Strings(data.Families) + + // Count the number of eventLogs in each family for each error age. + data.Counts = make([][]int, len(data.Families)) + for i, name := range data.Families { + // TODO(sameer): move this loop under the family lock. + f := getEventFamily(name) + data.Counts[i] = make([]int, len(data.Buckets)) + for j, b := range data.Buckets { + data.Counts[i][j] = f.Count(now, b.MaxErrAge) + } + } + + if req != nil { + var ok bool + data.Family, data.Bucket, ok = parseEventsArgs(req) + if !ok { + // No-op + } else { + data.EventLogs = getEventFamily(data.Family).Copy(now, buckets[data.Bucket].MaxErrAge) + } + if data.EventLogs != nil { + defer data.EventLogs.Free() + sort.Sort(data.EventLogs) + } + if exp, err := strconv.ParseBool(req.FormValue("exp")); err == nil { + data.Expanded = exp + } + } + + famMu.RLock() + defer famMu.RUnlock() + if err := eventsTmpl().Execute(w, data); err != nil { + log.Printf("net/trace: Failed executing template: %v", err) + } +} + +func parseEventsArgs(req *http.Request) (fam string, b int, ok bool) { + fam, bStr := req.FormValue("fam"), req.FormValue("b") + if fam == "" || bStr == "" { + return "", 0, false + } + b, err := strconv.Atoi(bStr) + if err != nil || b < 0 || b >= len(buckets) { + return "", 0, false + } + return fam, b, true +} + +// An EventLog provides a log of events associated with a specific object. +type EventLog interface { + // Printf formats its arguments with fmt.Sprintf and adds the + // result to the event log. + Printf(format string, a ...interface{}) + + // Errorf is like Printf, but it marks this event as an error. + Errorf(format string, a ...interface{}) + + // Finish declares that this event log is complete. + // The event log should not be used after calling this method. + Finish() +} + +// NewEventLog returns a new EventLog with the specified family name +// and title. +func NewEventLog(family, title string) EventLog { + el := newEventLog() + el.ref() + el.Family, el.Title = family, title + el.Start = time.Now() + el.events = make([]logEntry, 0, maxEventsPerLog) + el.stack = make([]uintptr, 32) + n := runtime.Callers(2, el.stack) + el.stack = el.stack[:n] + + getEventFamily(family).add(el) + return el +} + +func (el *eventLog) Finish() { + getEventFamily(el.Family).remove(el) + el.unref() // matches ref in New +} + +var ( + famMu sync.RWMutex + families = make(map[string]*eventFamily) // family name => family +) + +func getEventFamily(fam string) *eventFamily { + famMu.Lock() + defer famMu.Unlock() + f := families[fam] + if f == nil { + f = &eventFamily{} + families[fam] = f + } + return f +} + +type eventFamily struct { + mu sync.RWMutex + eventLogs eventLogs +} + +func (f *eventFamily) add(el *eventLog) { + f.mu.Lock() + f.eventLogs = append(f.eventLogs, el) + f.mu.Unlock() +} + +func (f *eventFamily) remove(el *eventLog) { + f.mu.Lock() + defer f.mu.Unlock() + for i, el0 := range f.eventLogs { + if el == el0 { + copy(f.eventLogs[i:], f.eventLogs[i+1:]) + f.eventLogs = f.eventLogs[:len(f.eventLogs)-1] + return + } + } +} + +func (f *eventFamily) Count(now time.Time, maxErrAge time.Duration) (n int) { + f.mu.RLock() + defer f.mu.RUnlock() + for _, el := range f.eventLogs { + if el.hasRecentError(now, maxErrAge) { + n++ + } + } + return +} + +func (f *eventFamily) Copy(now time.Time, maxErrAge time.Duration) (els eventLogs) { + f.mu.RLock() + defer f.mu.RUnlock() + els = make(eventLogs, 0, len(f.eventLogs)) + for _, el := range f.eventLogs { + if el.hasRecentError(now, maxErrAge) { + el.ref() + els = append(els, el) + } + } + return +} + +type eventLogs []*eventLog + +// Free calls unref on each element of the list. +func (els eventLogs) Free() { + for _, el := range els { + el.unref() + } +} + +// eventLogs may be sorted in reverse chronological order. +func (els eventLogs) Len() int { return len(els) } +func (els eventLogs) Less(i, j int) bool { return els[i].Start.After(els[j].Start) } +func (els eventLogs) Swap(i, j int) { els[i], els[j] = els[j], els[i] } + +// A logEntry is a timestamped log entry in an event log. +type logEntry struct { + When time.Time + Elapsed time.Duration // since previous event in log + NewDay bool // whether this event is on a different day to the previous event + What string + IsErr bool +} + +// WhenString returns a string representation of the elapsed time of the event. +// It will include the date if midnight was crossed. +func (e logEntry) WhenString() string { + if e.NewDay { + return e.When.Format("2006/01/02 15:04:05.000000") + } + return e.When.Format("15:04:05.000000") +} + +// An eventLog represents an active event log. +type eventLog struct { + // Family is the top-level grouping of event logs to which this belongs. + Family string + + // Title is the title of this event log. + Title string + + // Timing information. + Start time.Time + + // Call stack where this event log was created. + stack []uintptr + + // Append-only sequence of events. + // + // TODO(sameer): change this to a ring buffer to avoid the array copy + // when we hit maxEventsPerLog. + mu sync.RWMutex + events []logEntry + LastErrorTime time.Time + discarded int + + refs int32 // how many buckets this is in +} + +func (el *eventLog) reset() { + // Clear all but the mutex. Mutexes may not be copied, even when unlocked. + el.Family = "" + el.Title = "" + el.Start = time.Time{} + el.stack = nil + el.events = nil + el.LastErrorTime = time.Time{} + el.discarded = 0 + el.refs = 0 +} + +func (el *eventLog) hasRecentError(now time.Time, maxErrAge time.Duration) bool { + if maxErrAge == 0 { + return true + } + el.mu.RLock() + defer el.mu.RUnlock() + return now.Sub(el.LastErrorTime) < maxErrAge +} + +// delta returns the elapsed time since the last event or the log start, +// and whether it spans midnight. +// L >= el.mu +func (el *eventLog) delta(t time.Time) (time.Duration, bool) { + if len(el.events) == 0 { + return t.Sub(el.Start), false + } + prev := el.events[len(el.events)-1].When + return t.Sub(prev), prev.Day() != t.Day() + +} + +func (el *eventLog) Printf(format string, a ...interface{}) { + el.printf(false, format, a...) +} + +func (el *eventLog) Errorf(format string, a ...interface{}) { + el.printf(true, format, a...) +} + +func (el *eventLog) printf(isErr bool, format string, a ...interface{}) { + e := logEntry{When: time.Now(), IsErr: isErr, What: fmt.Sprintf(format, a...)} + el.mu.Lock() + e.Elapsed, e.NewDay = el.delta(e.When) + if len(el.events) < maxEventsPerLog { + el.events = append(el.events, e) + } else { + // Discard the oldest event. + if el.discarded == 0 { + // el.discarded starts at two to count for the event it + // is replacing, plus the next one that we are about to + // drop. + el.discarded = 2 + } else { + el.discarded++ + } + // TODO(sameer): if this causes allocations on a critical path, + // change eventLog.What to be a fmt.Stringer, as in trace.go. + el.events[0].What = fmt.Sprintf("(%d events discarded)", el.discarded) + // The timestamp of the discarded meta-event should be + // the time of the last event it is representing. + el.events[0].When = el.events[1].When + copy(el.events[1:], el.events[2:]) + el.events[maxEventsPerLog-1] = e + } + if e.IsErr { + el.LastErrorTime = e.When + } + el.mu.Unlock() +} + +func (el *eventLog) ref() { + atomic.AddInt32(&el.refs, 1) +} + +func (el *eventLog) unref() { + if atomic.AddInt32(&el.refs, -1) == 0 { + freeEventLog(el) + } +} + +func (el *eventLog) When() string { + return el.Start.Format("2006/01/02 15:04:05.000000") +} + +func (el *eventLog) ElapsedTime() string { + elapsed := time.Since(el.Start) + return fmt.Sprintf("%.6f", elapsed.Seconds()) +} + +func (el *eventLog) Stack() string { + buf := new(bytes.Buffer) + tw := tabwriter.NewWriter(buf, 1, 8, 1, '\t', 0) + printStackRecord(tw, el.stack) + tw.Flush() + return buf.String() +} + +// printStackRecord prints the function + source line information +// for a single stack trace. +// Adapted from runtime/pprof/pprof.go. +func printStackRecord(w io.Writer, stk []uintptr) { + for _, pc := range stk { + f := runtime.FuncForPC(pc) + if f == nil { + continue + } + file, line := f.FileLine(pc) + name := f.Name() + // Hide runtime.goexit and any runtime functions at the beginning. + if strings.HasPrefix(name, "runtime.") { + continue + } + fmt.Fprintf(w, "# %s\t%s:%d\n", name, file, line) + } +} + +func (el *eventLog) Events() []logEntry { + el.mu.RLock() + defer el.mu.RUnlock() + return el.events +} + +// freeEventLogs is a freelist of *eventLog +var freeEventLogs = make(chan *eventLog, 1000) + +// newEventLog returns a event log ready to use. +func newEventLog() *eventLog { + select { + case el := <-freeEventLogs: + return el + default: + return new(eventLog) + } +} + +// freeEventLog adds el to freeEventLogs if there's room. +// This is non-blocking. +func freeEventLog(el *eventLog) { + el.reset() + select { + case freeEventLogs <- el: + default: + } +} + +var eventsTmplCache *template.Template +var eventsTmplOnce sync.Once + +func eventsTmpl() *template.Template { + eventsTmplOnce.Do(func() { + eventsTmplCache = template.Must(template.New("events").Funcs(template.FuncMap{ + "elapsed": elapsed, + "trimSpace": strings.TrimSpace, + }).Parse(eventsHTML)) + }) + return eventsTmplCache +} + +const eventsHTML = ` + + + events + + + + +

/debug/events

+ + + {{range $i, $fam := .Families}} + + + + {{range $j, $bucket := $.Buckets}} + {{$n := index $.Counts $i $j}} + + {{end}} + + {{end}} +
{{$fam}} + {{if $n}}{{end}} + [{{$n}} {{$bucket.String}}] + {{if $n}}{{end}} +
+ +{{if $.EventLogs}} +
+

Family: {{$.Family}}

+ +{{if $.Expanded}}{{end}} +[Summary]{{if $.Expanded}}{{end}} + +{{if not $.Expanded}}{{end}} +[Expanded]{{if not $.Expanded}}{{end}} + + + + {{range $el := $.EventLogs}} + + + + + {{if $.Expanded}} + + + + + + {{range $el.Events}} + + + + + + {{end}} + {{end}} + {{end}} +
WhenElapsed
{{$el.When}}{{$el.ElapsedTime}}{{$el.Title}} + 
{{$el.Stack|trimSpace}}
{{.WhenString}}{{elapsed .Elapsed}}.{{if .IsErr}}E{{else}}.{{end}}. {{.What}}
+{{end}} + + +` diff --git a/vendor/golang.org/x/net/trace/histogram.go b/vendor/golang.org/x/net/trace/histogram.go new file mode 100644 index 0000000..9bf4286 --- /dev/null +++ b/vendor/golang.org/x/net/trace/histogram.go @@ -0,0 +1,365 @@ +// Copyright 2015 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package trace + +// This file implements histogramming for RPC statistics collection. + +import ( + "bytes" + "fmt" + "html/template" + "log" + "math" + "sync" + + "golang.org/x/net/internal/timeseries" +) + +const ( + bucketCount = 38 +) + +// histogram keeps counts of values in buckets that are spaced +// out in powers of 2: 0-1, 2-3, 4-7... +// histogram implements timeseries.Observable +type histogram struct { + sum int64 // running total of measurements + sumOfSquares float64 // square of running total + buckets []int64 // bucketed values for histogram + value int // holds a single value as an optimization + valueCount int64 // number of values recorded for single value +} + +// AddMeasurement records a value measurement observation to the histogram. +func (h *histogram) addMeasurement(value int64) { + // TODO: assert invariant + h.sum += value + h.sumOfSquares += float64(value) * float64(value) + + bucketIndex := getBucket(value) + + if h.valueCount == 0 || (h.valueCount > 0 && h.value == bucketIndex) { + h.value = bucketIndex + h.valueCount++ + } else { + h.allocateBuckets() + h.buckets[bucketIndex]++ + } +} + +func (h *histogram) allocateBuckets() { + if h.buckets == nil { + h.buckets = make([]int64, bucketCount) + h.buckets[h.value] = h.valueCount + h.value = 0 + h.valueCount = -1 + } +} + +func log2(i int64) int { + n := 0 + for ; i >= 0x100; i >>= 8 { + n += 8 + } + for ; i > 0; i >>= 1 { + n += 1 + } + return n +} + +func getBucket(i int64) (index int) { + index = log2(i) - 1 + if index < 0 { + index = 0 + } + if index >= bucketCount { + index = bucketCount - 1 + } + return +} + +// Total returns the number of recorded observations. +func (h *histogram) total() (total int64) { + if h.valueCount >= 0 { + total = h.valueCount + } + for _, val := range h.buckets { + total += int64(val) + } + return +} + +// Average returns the average value of recorded observations. +func (h *histogram) average() float64 { + t := h.total() + if t == 0 { + return 0 + } + return float64(h.sum) / float64(t) +} + +// Variance returns the variance of recorded observations. +func (h *histogram) variance() float64 { + t := float64(h.total()) + if t == 0 { + return 0 + } + s := float64(h.sum) / t + return h.sumOfSquares/t - s*s +} + +// StandardDeviation returns the standard deviation of recorded observations. +func (h *histogram) standardDeviation() float64 { + return math.Sqrt(h.variance()) +} + +// PercentileBoundary estimates the value that the given fraction of recorded +// observations are less than. +func (h *histogram) percentileBoundary(percentile float64) int64 { + total := h.total() + + // Corner cases (make sure result is strictly less than Total()) + if total == 0 { + return 0 + } else if total == 1 { + return int64(h.average()) + } + + percentOfTotal := round(float64(total) * percentile) + var runningTotal int64 + + for i := range h.buckets { + value := h.buckets[i] + runningTotal += value + if runningTotal == percentOfTotal { + // We hit an exact bucket boundary. If the next bucket has data, it is a + // good estimate of the value. If the bucket is empty, we interpolate the + // midpoint between the next bucket's boundary and the next non-zero + // bucket. If the remaining buckets are all empty, then we use the + // boundary for the next bucket as the estimate. + j := uint8(i + 1) + min := bucketBoundary(j) + if runningTotal < total { + for h.buckets[j] == 0 { + j++ + } + } + max := bucketBoundary(j) + return min + round(float64(max-min)/2) + } else if runningTotal > percentOfTotal { + // The value is in this bucket. Interpolate the value. + delta := runningTotal - percentOfTotal + percentBucket := float64(value-delta) / float64(value) + bucketMin := bucketBoundary(uint8(i)) + nextBucketMin := bucketBoundary(uint8(i + 1)) + bucketSize := nextBucketMin - bucketMin + return bucketMin + round(percentBucket*float64(bucketSize)) + } + } + return bucketBoundary(bucketCount - 1) +} + +// Median returns the estimated median of the observed values. +func (h *histogram) median() int64 { + return h.percentileBoundary(0.5) +} + +// Add adds other to h. +func (h *histogram) Add(other timeseries.Observable) { + o := other.(*histogram) + if o.valueCount == 0 { + // Other histogram is empty + } else if h.valueCount >= 0 && o.valueCount > 0 && h.value == o.value { + // Both have a single bucketed value, aggregate them + h.valueCount += o.valueCount + } else { + // Two different values necessitate buckets in this histogram + h.allocateBuckets() + if o.valueCount >= 0 { + h.buckets[o.value] += o.valueCount + } else { + for i := range h.buckets { + h.buckets[i] += o.buckets[i] + } + } + } + h.sumOfSquares += o.sumOfSquares + h.sum += o.sum +} + +// Clear resets the histogram to an empty state, removing all observed values. +func (h *histogram) Clear() { + h.buckets = nil + h.value = 0 + h.valueCount = 0 + h.sum = 0 + h.sumOfSquares = 0 +} + +// CopyFrom copies from other, which must be a *histogram, into h. +func (h *histogram) CopyFrom(other timeseries.Observable) { + o := other.(*histogram) + if o.valueCount == -1 { + h.allocateBuckets() + copy(h.buckets, o.buckets) + } + h.sum = o.sum + h.sumOfSquares = o.sumOfSquares + h.value = o.value + h.valueCount = o.valueCount +} + +// Multiply scales the histogram by the specified ratio. +func (h *histogram) Multiply(ratio float64) { + if h.valueCount == -1 { + for i := range h.buckets { + h.buckets[i] = int64(float64(h.buckets[i]) * ratio) + } + } else { + h.valueCount = int64(float64(h.valueCount) * ratio) + } + h.sum = int64(float64(h.sum) * ratio) + h.sumOfSquares = h.sumOfSquares * ratio +} + +// New creates a new histogram. +func (h *histogram) New() timeseries.Observable { + r := new(histogram) + r.Clear() + return r +} + +func (h *histogram) String() string { + return fmt.Sprintf("%d, %f, %d, %d, %v", + h.sum, h.sumOfSquares, h.value, h.valueCount, h.buckets) +} + +// round returns the closest int64 to the argument +func round(in float64) int64 { + return int64(math.Floor(in + 0.5)) +} + +// bucketBoundary returns the first value in the bucket. +func bucketBoundary(bucket uint8) int64 { + if bucket == 0 { + return 0 + } + return 1 << bucket +} + +// bucketData holds data about a specific bucket for use in distTmpl. +type bucketData struct { + Lower, Upper int64 + N int64 + Pct, CumulativePct float64 + GraphWidth int +} + +// data holds data about a Distribution for use in distTmpl. +type data struct { + Buckets []*bucketData + Count, Median int64 + Mean, StandardDeviation float64 +} + +// maxHTMLBarWidth is the maximum width of the HTML bar for visualizing buckets. +const maxHTMLBarWidth = 350.0 + +// newData returns data representing h for use in distTmpl. +func (h *histogram) newData() *data { + // Force the allocation of buckets to simplify the rendering implementation + h.allocateBuckets() + // We scale the bars on the right so that the largest bar is + // maxHTMLBarWidth pixels in width. + maxBucket := int64(0) + for _, n := range h.buckets { + if n > maxBucket { + maxBucket = n + } + } + total := h.total() + barsizeMult := maxHTMLBarWidth / float64(maxBucket) + var pctMult float64 + if total == 0 { + pctMult = 1.0 + } else { + pctMult = 100.0 / float64(total) + } + + buckets := make([]*bucketData, len(h.buckets)) + runningTotal := int64(0) + for i, n := range h.buckets { + if n == 0 { + continue + } + runningTotal += n + var upperBound int64 + if i < bucketCount-1 { + upperBound = bucketBoundary(uint8(i + 1)) + } else { + upperBound = math.MaxInt64 + } + buckets[i] = &bucketData{ + Lower: bucketBoundary(uint8(i)), + Upper: upperBound, + N: n, + Pct: float64(n) * pctMult, + CumulativePct: float64(runningTotal) * pctMult, + GraphWidth: int(float64(n) * barsizeMult), + } + } + return &data{ + Buckets: buckets, + Count: total, + Median: h.median(), + Mean: h.average(), + StandardDeviation: h.standardDeviation(), + } +} + +func (h *histogram) html() template.HTML { + buf := new(bytes.Buffer) + if err := distTmpl().Execute(buf, h.newData()); err != nil { + buf.Reset() + log.Printf("net/trace: couldn't execute template: %v", err) + } + return template.HTML(buf.String()) +} + +var distTmplCache *template.Template +var distTmplOnce sync.Once + +func distTmpl() *template.Template { + distTmplOnce.Do(func() { + // Input: data + distTmplCache = template.Must(template.New("distTmpl").Parse(` + + + + + + + +
Count: {{.Count}}Mean: {{printf "%.0f" .Mean}}StdDev: {{printf "%.0f" .StandardDeviation}}Median: {{.Median}}
+
+ +{{range $b := .Buckets}} +{{if $b}} + + + + + + + + + +{{end}} +{{end}} +
[{{.Lower}},{{.Upper}}){{.N}}{{printf "%#.3f" .Pct}}%{{printf "%#.3f" .CumulativePct}}%
+`)) + }) + return distTmplCache +} diff --git a/vendor/golang.org/x/net/trace/trace.go b/vendor/golang.org/x/net/trace/trace.go new file mode 100644 index 0000000..64f56a3 --- /dev/null +++ b/vendor/golang.org/x/net/trace/trace.go @@ -0,0 +1,1079 @@ +// Copyright 2015 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +/* +Package trace implements tracing of requests and long-lived objects. +It exports HTTP interfaces on /debug/requests and /debug/events. + +A trace.Trace provides tracing for short-lived objects, usually requests. +A request handler might be implemented like this: + + func fooHandler(w http.ResponseWriter, req *http.Request) { + tr := trace.New("mypkg.Foo", req.URL.Path) + defer tr.Finish() + ... + tr.LazyPrintf("some event %q happened", str) + ... + if err := somethingImportant(); err != nil { + tr.LazyPrintf("somethingImportant failed: %v", err) + tr.SetError() + } + } + +The /debug/requests HTTP endpoint organizes the traces by family, +errors, and duration. It also provides histogram of request duration +for each family. + +A trace.EventLog provides tracing for long-lived objects, such as RPC +connections. + + // A Fetcher fetches URL paths for a single domain. + type Fetcher struct { + domain string + events trace.EventLog + } + + func NewFetcher(domain string) *Fetcher { + return &Fetcher{ + domain, + trace.NewEventLog("mypkg.Fetcher", domain), + } + } + + func (f *Fetcher) Fetch(path string) (string, error) { + resp, err := http.Get("http://" + f.domain + "/" + path) + if err != nil { + f.events.Errorf("Get(%q) = %v", path, err) + return "", err + } + f.events.Printf("Get(%q) = %s", path, resp.Status) + ... + } + + func (f *Fetcher) Close() error { + f.events.Finish() + return nil + } + +The /debug/events HTTP endpoint organizes the event logs by family and +by time since the last error. The expanded view displays recent log +entries and the log's call stack. +*/ +package trace // import "golang.org/x/net/trace" + +import ( + "bytes" + "fmt" + "html/template" + "io" + "log" + "net" + "net/http" + "runtime" + "sort" + "strconv" + "sync" + "sync/atomic" + "time" + + "golang.org/x/net/context" + "golang.org/x/net/internal/timeseries" +) + +// DebugUseAfterFinish controls whether to debug uses of Trace values after finishing. +// FOR DEBUGGING ONLY. This will slow down the program. +var DebugUseAfterFinish = false + +// AuthRequest determines whether a specific request is permitted to load the +// /debug/requests or /debug/events pages. +// +// It returns two bools; the first indicates whether the page may be viewed at all, +// and the second indicates whether sensitive events will be shown. +// +// AuthRequest may be replaced by a program to customize its authorization requirements. +// +// The default AuthRequest function returns (true, true) if and only if the request +// comes from localhost/127.0.0.1/[::1]. +var AuthRequest = func(req *http.Request) (any, sensitive bool) { + // RemoteAddr is commonly in the form "IP" or "IP:port". + // If it is in the form "IP:port", split off the port. + host, _, err := net.SplitHostPort(req.RemoteAddr) + if err != nil { + host = req.RemoteAddr + } + switch host { + case "localhost", "127.0.0.1", "::1": + return true, true + default: + return false, false + } +} + +func init() { + http.HandleFunc("/debug/requests", func(w http.ResponseWriter, req *http.Request) { + any, sensitive := AuthRequest(req) + if !any { + http.Error(w, "not allowed", http.StatusUnauthorized) + return + } + w.Header().Set("Content-Type", "text/html; charset=utf-8") + Render(w, req, sensitive) + }) + http.HandleFunc("/debug/events", func(w http.ResponseWriter, req *http.Request) { + any, sensitive := AuthRequest(req) + if !any { + http.Error(w, "not allowed", http.StatusUnauthorized) + return + } + w.Header().Set("Content-Type", "text/html; charset=utf-8") + RenderEvents(w, req, sensitive) + }) +} + +// Render renders the HTML page typically served at /debug/requests. +// It does not do any auth checking; see AuthRequest for the default auth check +// used by the handler registered on http.DefaultServeMux. +// req may be nil. +func Render(w io.Writer, req *http.Request, sensitive bool) { + data := &struct { + Families []string + ActiveTraceCount map[string]int + CompletedTraces map[string]*family + + // Set when a bucket has been selected. + Traces traceList + Family string + Bucket int + Expanded bool + Traced bool + Active bool + ShowSensitive bool // whether to show sensitive events + + Histogram template.HTML + HistogramWindow string // e.g. "last minute", "last hour", "all time" + + // If non-zero, the set of traces is a partial set, + // and this is the total number. + Total int + }{ + CompletedTraces: completedTraces, + } + + data.ShowSensitive = sensitive + if req != nil { + // Allow show_sensitive=0 to force hiding of sensitive data for testing. + // This only goes one way; you can't use show_sensitive=1 to see things. + if req.FormValue("show_sensitive") == "0" { + data.ShowSensitive = false + } + + if exp, err := strconv.ParseBool(req.FormValue("exp")); err == nil { + data.Expanded = exp + } + if exp, err := strconv.ParseBool(req.FormValue("rtraced")); err == nil { + data.Traced = exp + } + } + + completedMu.RLock() + data.Families = make([]string, 0, len(completedTraces)) + for fam := range completedTraces { + data.Families = append(data.Families, fam) + } + completedMu.RUnlock() + sort.Strings(data.Families) + + // We are careful here to minimize the time spent locking activeMu, + // since that lock is required every time an RPC starts and finishes. + data.ActiveTraceCount = make(map[string]int, len(data.Families)) + activeMu.RLock() + for fam, s := range activeTraces { + data.ActiveTraceCount[fam] = s.Len() + } + activeMu.RUnlock() + + var ok bool + data.Family, data.Bucket, ok = parseArgs(req) + switch { + case !ok: + // No-op + case data.Bucket == -1: + data.Active = true + n := data.ActiveTraceCount[data.Family] + data.Traces = getActiveTraces(data.Family) + if len(data.Traces) < n { + data.Total = n + } + case data.Bucket < bucketsPerFamily: + if b := lookupBucket(data.Family, data.Bucket); b != nil { + data.Traces = b.Copy(data.Traced) + } + default: + if f := getFamily(data.Family, false); f != nil { + var obs timeseries.Observable + f.LatencyMu.RLock() + switch o := data.Bucket - bucketsPerFamily; o { + case 0: + obs = f.Latency.Minute() + data.HistogramWindow = "last minute" + case 1: + obs = f.Latency.Hour() + data.HistogramWindow = "last hour" + case 2: + obs = f.Latency.Total() + data.HistogramWindow = "all time" + } + f.LatencyMu.RUnlock() + if obs != nil { + data.Histogram = obs.(*histogram).html() + } + } + } + + if data.Traces != nil { + defer data.Traces.Free() + sort.Sort(data.Traces) + } + + completedMu.RLock() + defer completedMu.RUnlock() + if err := pageTmpl().ExecuteTemplate(w, "Page", data); err != nil { + log.Printf("net/trace: Failed executing template: %v", err) + } +} + +func parseArgs(req *http.Request) (fam string, b int, ok bool) { + if req == nil { + return "", 0, false + } + fam, bStr := req.FormValue("fam"), req.FormValue("b") + if fam == "" || bStr == "" { + return "", 0, false + } + b, err := strconv.Atoi(bStr) + if err != nil || b < -1 { + return "", 0, false + } + + return fam, b, true +} + +func lookupBucket(fam string, b int) *traceBucket { + f := getFamily(fam, false) + if f == nil || b < 0 || b >= len(f.Buckets) { + return nil + } + return f.Buckets[b] +} + +type contextKeyT string + +var contextKey = contextKeyT("golang.org/x/net/trace.Trace") + +// NewContext returns a copy of the parent context +// and associates it with a Trace. +func NewContext(ctx context.Context, tr Trace) context.Context { + return context.WithValue(ctx, contextKey, tr) +} + +// FromContext returns the Trace bound to the context, if any. +func FromContext(ctx context.Context) (tr Trace, ok bool) { + tr, ok = ctx.Value(contextKey).(Trace) + return +} + +// Trace represents an active request. +type Trace interface { + // LazyLog adds x to the event log. It will be evaluated each time the + // /debug/requests page is rendered. Any memory referenced by x will be + // pinned until the trace is finished and later discarded. + LazyLog(x fmt.Stringer, sensitive bool) + + // LazyPrintf evaluates its arguments with fmt.Sprintf each time the + // /debug/requests page is rendered. Any memory referenced by a will be + // pinned until the trace is finished and later discarded. + LazyPrintf(format string, a ...interface{}) + + // SetError declares that this trace resulted in an error. + SetError() + + // SetRecycler sets a recycler for the trace. + // f will be called for each event passed to LazyLog at a time when + // it is no longer required, whether while the trace is still active + // and the event is discarded, or when a completed trace is discarded. + SetRecycler(f func(interface{})) + + // SetTraceInfo sets the trace info for the trace. + // This is currently unused. + SetTraceInfo(traceID, spanID uint64) + + // SetMaxEvents sets the maximum number of events that will be stored + // in the trace. This has no effect if any events have already been + // added to the trace. + SetMaxEvents(m int) + + // Finish declares that this trace is complete. + // The trace should not be used after calling this method. + Finish() +} + +type lazySprintf struct { + format string + a []interface{} +} + +func (l *lazySprintf) String() string { + return fmt.Sprintf(l.format, l.a...) +} + +// New returns a new Trace with the specified family and title. +func New(family, title string) Trace { + tr := newTrace() + tr.ref() + tr.Family, tr.Title = family, title + tr.Start = time.Now() + tr.maxEvents = maxEventsPerTrace + tr.events = tr.eventsBuf[:0] + + activeMu.RLock() + s := activeTraces[tr.Family] + activeMu.RUnlock() + if s == nil { + activeMu.Lock() + s = activeTraces[tr.Family] // check again + if s == nil { + s = new(traceSet) + activeTraces[tr.Family] = s + } + activeMu.Unlock() + } + s.Add(tr) + + // Trigger allocation of the completed trace structure for this family. + // This will cause the family to be present in the request page during + // the first trace of this family. We don't care about the return value, + // nor is there any need for this to run inline, so we execute it in its + // own goroutine, but only if the family isn't allocated yet. + completedMu.RLock() + if _, ok := completedTraces[tr.Family]; !ok { + go allocFamily(tr.Family) + } + completedMu.RUnlock() + + return tr +} + +func (tr *trace) Finish() { + tr.Elapsed = time.Now().Sub(tr.Start) + if DebugUseAfterFinish { + buf := make([]byte, 4<<10) // 4 KB should be enough + n := runtime.Stack(buf, false) + tr.finishStack = buf[:n] + } + + activeMu.RLock() + m := activeTraces[tr.Family] + activeMu.RUnlock() + m.Remove(tr) + + f := getFamily(tr.Family, true) + for _, b := range f.Buckets { + if b.Cond.match(tr) { + b.Add(tr) + } + } + // Add a sample of elapsed time as microseconds to the family's timeseries + h := new(histogram) + h.addMeasurement(tr.Elapsed.Nanoseconds() / 1e3) + f.LatencyMu.Lock() + f.Latency.Add(h) + f.LatencyMu.Unlock() + + tr.unref() // matches ref in New +} + +const ( + bucketsPerFamily = 9 + tracesPerBucket = 10 + maxActiveTraces = 20 // Maximum number of active traces to show. + maxEventsPerTrace = 10 + numHistogramBuckets = 38 +) + +var ( + // The active traces. + activeMu sync.RWMutex + activeTraces = make(map[string]*traceSet) // family -> traces + + // Families of completed traces. + completedMu sync.RWMutex + completedTraces = make(map[string]*family) // family -> traces +) + +type traceSet struct { + mu sync.RWMutex + m map[*trace]bool + + // We could avoid the entire map scan in FirstN by having a slice of all the traces + // ordered by start time, and an index into that from the trace struct, with a periodic + // repack of the slice after enough traces finish; we could also use a skip list or similar. + // However, that would shift some of the expense from /debug/requests time to RPC time, + // which is probably the wrong trade-off. +} + +func (ts *traceSet) Len() int { + ts.mu.RLock() + defer ts.mu.RUnlock() + return len(ts.m) +} + +func (ts *traceSet) Add(tr *trace) { + ts.mu.Lock() + if ts.m == nil { + ts.m = make(map[*trace]bool) + } + ts.m[tr] = true + ts.mu.Unlock() +} + +func (ts *traceSet) Remove(tr *trace) { + ts.mu.Lock() + delete(ts.m, tr) + ts.mu.Unlock() +} + +// FirstN returns the first n traces ordered by time. +func (ts *traceSet) FirstN(n int) traceList { + ts.mu.RLock() + defer ts.mu.RUnlock() + + if n > len(ts.m) { + n = len(ts.m) + } + trl := make(traceList, 0, n) + + // Fast path for when no selectivity is needed. + if n == len(ts.m) { + for tr := range ts.m { + tr.ref() + trl = append(trl, tr) + } + sort.Sort(trl) + return trl + } + + // Pick the oldest n traces. + // This is inefficient. See the comment in the traceSet struct. + for tr := range ts.m { + // Put the first n traces into trl in the order they occur. + // When we have n, sort trl, and thereafter maintain its order. + if len(trl) < n { + tr.ref() + trl = append(trl, tr) + if len(trl) == n { + // This is guaranteed to happen exactly once during this loop. + sort.Sort(trl) + } + continue + } + if tr.Start.After(trl[n-1].Start) { + continue + } + + // Find where to insert this one. + tr.ref() + i := sort.Search(n, func(i int) bool { return trl[i].Start.After(tr.Start) }) + trl[n-1].unref() + copy(trl[i+1:], trl[i:]) + trl[i] = tr + } + + return trl +} + +func getActiveTraces(fam string) traceList { + activeMu.RLock() + s := activeTraces[fam] + activeMu.RUnlock() + if s == nil { + return nil + } + return s.FirstN(maxActiveTraces) +} + +func getFamily(fam string, allocNew bool) *family { + completedMu.RLock() + f := completedTraces[fam] + completedMu.RUnlock() + if f == nil && allocNew { + f = allocFamily(fam) + } + return f +} + +func allocFamily(fam string) *family { + completedMu.Lock() + defer completedMu.Unlock() + f := completedTraces[fam] + if f == nil { + f = newFamily() + completedTraces[fam] = f + } + return f +} + +// family represents a set of trace buckets and associated latency information. +type family struct { + // traces may occur in multiple buckets. + Buckets [bucketsPerFamily]*traceBucket + + // latency time series + LatencyMu sync.RWMutex + Latency *timeseries.MinuteHourSeries +} + +func newFamily() *family { + return &family{ + Buckets: [bucketsPerFamily]*traceBucket{ + {Cond: minCond(0)}, + {Cond: minCond(50 * time.Millisecond)}, + {Cond: minCond(100 * time.Millisecond)}, + {Cond: minCond(200 * time.Millisecond)}, + {Cond: minCond(500 * time.Millisecond)}, + {Cond: minCond(1 * time.Second)}, + {Cond: minCond(10 * time.Second)}, + {Cond: minCond(100 * time.Second)}, + {Cond: errorCond{}}, + }, + Latency: timeseries.NewMinuteHourSeries(func() timeseries.Observable { return new(histogram) }), + } +} + +// traceBucket represents a size-capped bucket of historic traces, +// along with a condition for a trace to belong to the bucket. +type traceBucket struct { + Cond cond + + // Ring buffer implementation of a fixed-size FIFO queue. + mu sync.RWMutex + buf [tracesPerBucket]*trace + start int // < tracesPerBucket + length int // <= tracesPerBucket +} + +func (b *traceBucket) Add(tr *trace) { + b.mu.Lock() + defer b.mu.Unlock() + + i := b.start + b.length + if i >= tracesPerBucket { + i -= tracesPerBucket + } + if b.length == tracesPerBucket { + // "Remove" an element from the bucket. + b.buf[i].unref() + b.start++ + if b.start == tracesPerBucket { + b.start = 0 + } + } + b.buf[i] = tr + if b.length < tracesPerBucket { + b.length++ + } + tr.ref() +} + +// Copy returns a copy of the traces in the bucket. +// If tracedOnly is true, only the traces with trace information will be returned. +// The logs will be ref'd before returning; the caller should call +// the Free method when it is done with them. +// TODO(dsymonds): keep track of traced requests in separate buckets. +func (b *traceBucket) Copy(tracedOnly bool) traceList { + b.mu.RLock() + defer b.mu.RUnlock() + + trl := make(traceList, 0, b.length) + for i, x := 0, b.start; i < b.length; i++ { + tr := b.buf[x] + if !tracedOnly || tr.spanID != 0 { + tr.ref() + trl = append(trl, tr) + } + x++ + if x == b.length { + x = 0 + } + } + return trl +} + +func (b *traceBucket) Empty() bool { + b.mu.RLock() + defer b.mu.RUnlock() + return b.length == 0 +} + +// cond represents a condition on a trace. +type cond interface { + match(t *trace) bool + String() string +} + +type minCond time.Duration + +func (m minCond) match(t *trace) bool { return t.Elapsed >= time.Duration(m) } +func (m minCond) String() string { return fmt.Sprintf("≥%gs", time.Duration(m).Seconds()) } + +type errorCond struct{} + +func (e errorCond) match(t *trace) bool { return t.IsError } +func (e errorCond) String() string { return "errors" } + +type traceList []*trace + +// Free calls unref on each element of the list. +func (trl traceList) Free() { + for _, t := range trl { + t.unref() + } +} + +// traceList may be sorted in reverse chronological order. +func (trl traceList) Len() int { return len(trl) } +func (trl traceList) Less(i, j int) bool { return trl[i].Start.After(trl[j].Start) } +func (trl traceList) Swap(i, j int) { trl[i], trl[j] = trl[j], trl[i] } + +// An event is a timestamped log entry in a trace. +type event struct { + When time.Time + Elapsed time.Duration // since previous event in trace + NewDay bool // whether this event is on a different day to the previous event + Recyclable bool // whether this event was passed via LazyLog + Sensitive bool // whether this event contains sensitive information + What interface{} // string or fmt.Stringer +} + +// WhenString returns a string representation of the elapsed time of the event. +// It will include the date if midnight was crossed. +func (e event) WhenString() string { + if e.NewDay { + return e.When.Format("2006/01/02 15:04:05.000000") + } + return e.When.Format("15:04:05.000000") +} + +// discarded represents a number of discarded events. +// It is stored as *discarded to make it easier to update in-place. +type discarded int + +func (d *discarded) String() string { + return fmt.Sprintf("(%d events discarded)", int(*d)) +} + +// trace represents an active or complete request, +// either sent or received by this program. +type trace struct { + // Family is the top-level grouping of traces to which this belongs. + Family string + + // Title is the title of this trace. + Title string + + // Timing information. + Start time.Time + Elapsed time.Duration // zero while active + + // Trace information if non-zero. + traceID uint64 + spanID uint64 + + // Whether this trace resulted in an error. + IsError bool + + // Append-only sequence of events (modulo discards). + mu sync.RWMutex + events []event + maxEvents int + + refs int32 // how many buckets this is in + recycler func(interface{}) + disc discarded // scratch space to avoid allocation + + finishStack []byte // where finish was called, if DebugUseAfterFinish is set + + eventsBuf [4]event // preallocated buffer in case we only log a few events +} + +func (tr *trace) reset() { + // Clear all but the mutex. Mutexes may not be copied, even when unlocked. + tr.Family = "" + tr.Title = "" + tr.Start = time.Time{} + tr.Elapsed = 0 + tr.traceID = 0 + tr.spanID = 0 + tr.IsError = false + tr.maxEvents = 0 + tr.events = nil + tr.refs = 0 + tr.recycler = nil + tr.disc = 0 + tr.finishStack = nil + for i := range tr.eventsBuf { + tr.eventsBuf[i] = event{} + } +} + +// delta returns the elapsed time since the last event or the trace start, +// and whether it spans midnight. +// L >= tr.mu +func (tr *trace) delta(t time.Time) (time.Duration, bool) { + if len(tr.events) == 0 { + return t.Sub(tr.Start), false + } + prev := tr.events[len(tr.events)-1].When + return t.Sub(prev), prev.Day() != t.Day() +} + +func (tr *trace) addEvent(x interface{}, recyclable, sensitive bool) { + if DebugUseAfterFinish && tr.finishStack != nil { + buf := make([]byte, 4<<10) // 4 KB should be enough + n := runtime.Stack(buf, false) + log.Printf("net/trace: trace used after finish:\nFinished at:\n%s\nUsed at:\n%s", tr.finishStack, buf[:n]) + } + + /* + NOTE TO DEBUGGERS + + If you are here because your program panicked in this code, + it is almost definitely the fault of code using this package, + and very unlikely to be the fault of this code. + + The most likely scenario is that some code elsewhere is using + a trace.Trace after its Finish method is called. + You can temporarily set the DebugUseAfterFinish var + to help discover where that is; do not leave that var set, + since it makes this package much less efficient. + */ + + e := event{When: time.Now(), What: x, Recyclable: recyclable, Sensitive: sensitive} + tr.mu.Lock() + e.Elapsed, e.NewDay = tr.delta(e.When) + if len(tr.events) < tr.maxEvents { + tr.events = append(tr.events, e) + } else { + // Discard the middle events. + di := int((tr.maxEvents - 1) / 2) + if d, ok := tr.events[di].What.(*discarded); ok { + (*d)++ + } else { + // disc starts at two to count for the event it is replacing, + // plus the next one that we are about to drop. + tr.disc = 2 + if tr.recycler != nil && tr.events[di].Recyclable { + go tr.recycler(tr.events[di].What) + } + tr.events[di].What = &tr.disc + } + // The timestamp of the discarded meta-event should be + // the time of the last event it is representing. + tr.events[di].When = tr.events[di+1].When + + if tr.recycler != nil && tr.events[di+1].Recyclable { + go tr.recycler(tr.events[di+1].What) + } + copy(tr.events[di+1:], tr.events[di+2:]) + tr.events[tr.maxEvents-1] = e + } + tr.mu.Unlock() +} + +func (tr *trace) LazyLog(x fmt.Stringer, sensitive bool) { + tr.addEvent(x, true, sensitive) +} + +func (tr *trace) LazyPrintf(format string, a ...interface{}) { + tr.addEvent(&lazySprintf{format, a}, false, false) +} + +func (tr *trace) SetError() { tr.IsError = true } + +func (tr *trace) SetRecycler(f func(interface{})) { + tr.recycler = f +} + +func (tr *trace) SetTraceInfo(traceID, spanID uint64) { + tr.traceID, tr.spanID = traceID, spanID +} + +func (tr *trace) SetMaxEvents(m int) { + // Always keep at least three events: first, discarded count, last. + if len(tr.events) == 0 && m > 3 { + tr.maxEvents = m + } +} + +func (tr *trace) ref() { + atomic.AddInt32(&tr.refs, 1) +} + +func (tr *trace) unref() { + if atomic.AddInt32(&tr.refs, -1) == 0 { + if tr.recycler != nil { + // freeTrace clears tr, so we hold tr.recycler and tr.events here. + go func(f func(interface{}), es []event) { + for _, e := range es { + if e.Recyclable { + f(e.What) + } + } + }(tr.recycler, tr.events) + } + + freeTrace(tr) + } +} + +func (tr *trace) When() string { + return tr.Start.Format("2006/01/02 15:04:05.000000") +} + +func (tr *trace) ElapsedTime() string { + t := tr.Elapsed + if t == 0 { + // Active trace. + t = time.Since(tr.Start) + } + return fmt.Sprintf("%.6f", t.Seconds()) +} + +func (tr *trace) Events() []event { + tr.mu.RLock() + defer tr.mu.RUnlock() + return tr.events +} + +var traceFreeList = make(chan *trace, 1000) // TODO(dsymonds): Use sync.Pool? + +// newTrace returns a trace ready to use. +func newTrace() *trace { + select { + case tr := <-traceFreeList: + return tr + default: + return new(trace) + } +} + +// freeTrace adds tr to traceFreeList if there's room. +// This is non-blocking. +func freeTrace(tr *trace) { + if DebugUseAfterFinish { + return // never reuse + } + tr.reset() + select { + case traceFreeList <- tr: + default: + } +} + +func elapsed(d time.Duration) string { + b := []byte(fmt.Sprintf("%.6f", d.Seconds())) + + // For subsecond durations, blank all zeros before decimal point, + // and all zeros between the decimal point and the first non-zero digit. + if d < time.Second { + dot := bytes.IndexByte(b, '.') + for i := 0; i < dot; i++ { + b[i] = ' ' + } + for i := dot + 1; i < len(b); i++ { + if b[i] == '0' { + b[i] = ' ' + } else { + break + } + } + } + + return string(b) +} + +var pageTmplCache *template.Template +var pageTmplOnce sync.Once + +func pageTmpl() *template.Template { + pageTmplOnce.Do(func() { + pageTmplCache = template.Must(template.New("Page").Funcs(template.FuncMap{ + "elapsed": elapsed, + "add": func(a, b int) int { return a + b }, + }).Parse(pageHTML)) + }) + return pageTmplCache +} + +const pageHTML = ` +{{template "Prolog" .}} +{{template "StatusTable" .}} +{{template "Epilog" .}} + +{{define "Prolog"}} + + + /debug/requests + + + + +

/debug/requests

+{{end}} {{/* end of Prolog */}} + +{{define "StatusTable"}} + + {{range $fam := .Families}} + + + + {{$n := index $.ActiveTraceCount $fam}} + + + {{$f := index $.CompletedTraces $fam}} + {{range $i, $b := $f.Buckets}} + {{$empty := $b.Empty}} + + {{end}} + + {{$nb := len $f.Buckets}} + + + + + + {{end}} +
{{$fam}} + {{if $n}}{{end}} + [{{$n}} active] + {{if $n}}{{end}} + + {{if not $empty}}{{end}} + [{{.Cond}}] + {{if not $empty}}{{end}} + + [minute] + + [hour] + + [total] +
+{{end}} {{/* end of StatusTable */}} + +{{define "Epilog"}} +{{if $.Traces}} +
+

Family: {{$.Family}}

+ +{{if or $.Expanded $.Traced}} + [Normal/Summary] +{{else}} + [Normal/Summary] +{{end}} + +{{if or (not $.Expanded) $.Traced}} + [Normal/Expanded] +{{else}} + [Normal/Expanded] +{{end}} + +{{if not $.Active}} + {{if or $.Expanded (not $.Traced)}} + [Traced/Summary] + {{else}} + [Traced/Summary] + {{end}} + {{if or (not $.Expanded) (not $.Traced)}} + [Traced/Expanded] + {{else}} + [Traced/Expanded] + {{end}} +{{end}} + +{{if $.Total}} +

Showing {{len $.Traces}} of {{$.Total}} traces.

+{{end}} + + + + + {{range $tr := $.Traces}} + + + + + {{/* TODO: include traceID/spanID */}} + + {{if $.Expanded}} + {{range $tr.Events}} + + + + + + {{end}} + {{end}} + {{end}} +
+ {{if $.Active}}Active{{else}}Completed{{end}} Requests +
WhenElapsed (s)
{{$tr.When}}{{$tr.ElapsedTime}}{{$tr.Title}}
{{.WhenString}}{{elapsed .Elapsed}}{{if or $.ShowSensitive (not .Sensitive)}}... {{.What}}{{else}}[redacted]{{end}}
+{{end}} {{/* if $.Traces */}} + +{{if $.Histogram}} +

Latency (µs) of {{$.Family}} over {{$.HistogramWindow}}

+{{$.Histogram}} +{{end}} {{/* if $.Histogram */}} + + + +{{end}} {{/* end of Epilog */}} +` diff --git a/vendor/google.golang.org/grpc/backoff.go b/vendor/google.golang.org/grpc/backoff.go new file mode 100644 index 0000000..c99024e --- /dev/null +++ b/vendor/google.golang.org/grpc/backoff.go @@ -0,0 +1,80 @@ +package grpc + +import ( + "math/rand" + "time" +) + +// DefaultBackoffConfig uses values specified for backoff in +// https://github.com/grpc/grpc/blob/master/doc/connection-backoff.md. +var ( + DefaultBackoffConfig = BackoffConfig{ + MaxDelay: 120 * time.Second, + baseDelay: 1.0 * time.Second, + factor: 1.6, + jitter: 0.2, + } +) + +// backoffStrategy defines the methodology for backing off after a grpc +// connection failure. +// +// This is unexported until the gRPC project decides whether or not to allow +// alternative backoff strategies. Once a decision is made, this type and its +// method may be exported. +type backoffStrategy interface { + // backoff returns the amount of time to wait before the next retry given + // the number of consecutive failures. + backoff(retries int) time.Duration +} + +// BackoffConfig defines the parameters for the default gRPC backoff strategy. +type BackoffConfig struct { + // MaxDelay is the upper bound of backoff delay. + MaxDelay time.Duration + + // TODO(stevvooe): The following fields are not exported, as allowing + // changes would violate the current gRPC specification for backoff. If + // gRPC decides to allow more interesting backoff strategies, these fields + // may be opened up in the future. + + // baseDelay is the amount of time to wait before retrying after the first + // failure. + baseDelay time.Duration + + // factor is applied to the backoff after each retry. + factor float64 + + // jitter provides a range to randomize backoff delays. + jitter float64 +} + +func setDefaults(bc *BackoffConfig) { + md := bc.MaxDelay + *bc = DefaultBackoffConfig + + if md > 0 { + bc.MaxDelay = md + } +} + +func (bc BackoffConfig) backoff(retries int) time.Duration { + if retries == 0 { + return bc.baseDelay + } + backoff, max := float64(bc.baseDelay), float64(bc.MaxDelay) + for backoff < max && retries > 0 { + backoff *= bc.factor + retries-- + } + if backoff > max { + backoff = max + } + // Randomize backoff delays so that if a cluster of requests start at + // the same time, they won't operate in lockstep. + backoff *= 1 + bc.jitter*(rand.Float64()*2-1) + if backoff < 0 { + return 0 + } + return time.Duration(backoff) +} diff --git a/vendor/google.golang.org/grpc/balancer.go b/vendor/google.golang.org/grpc/balancer.go new file mode 100644 index 0000000..9d943fb --- /dev/null +++ b/vendor/google.golang.org/grpc/balancer.go @@ -0,0 +1,400 @@ +/* + * + * Copyright 2016, Google Inc. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are + * met: + * + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following disclaimer + * in the documentation and/or other materials provided with the + * distribution. + * * Neither the name of Google Inc. nor the names of its + * contributors may be used to endorse or promote products derived from + * this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT + * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * + */ + +package grpc + +import ( + "fmt" + "sync" + + "golang.org/x/net/context" + "google.golang.org/grpc/codes" + "google.golang.org/grpc/credentials" + "google.golang.org/grpc/grpclog" + "google.golang.org/grpc/naming" +) + +// Address represents a server the client connects to. +// This is the EXPERIMENTAL API and may be changed or extended in the future. +type Address struct { + // Addr is the server address on which a connection will be established. + Addr string + // Metadata is the information associated with Addr, which may be used + // to make load balancing decision. + Metadata interface{} +} + +// BalancerConfig specifies the configurations for Balancer. +type BalancerConfig struct { + // DialCreds is the transport credential the Balancer implementation can + // use to dial to a remote load balancer server. The Balancer implementations + // can ignore this if it does not need to talk to another party securely. + DialCreds credentials.TransportCredentials +} + +// BalancerGetOptions configures a Get call. +// This is the EXPERIMENTAL API and may be changed or extended in the future. +type BalancerGetOptions struct { + // BlockingWait specifies whether Get should block when there is no + // connected address. + BlockingWait bool +} + +// Balancer chooses network addresses for RPCs. +// This is the EXPERIMENTAL API and may be changed or extended in the future. +type Balancer interface { + // Start does the initialization work to bootstrap a Balancer. For example, + // this function may start the name resolution and watch the updates. It will + // be called when dialing. + Start(target string, config BalancerConfig) error + // Up informs the Balancer that gRPC has a connection to the server at + // addr. It returns down which is called once the connection to addr gets + // lost or closed. + // TODO: It is not clear how to construct and take advantage of the meaningful error + // parameter for down. Need realistic demands to guide. + Up(addr Address) (down func(error)) + // Get gets the address of a server for the RPC corresponding to ctx. + // i) If it returns a connected address, gRPC internals issues the RPC on the + // connection to this address; + // ii) If it returns an address on which the connection is under construction + // (initiated by Notify(...)) but not connected, gRPC internals + // * fails RPC if the RPC is fail-fast and connection is in the TransientFailure or + // Shutdown state; + // or + // * issues RPC on the connection otherwise. + // iii) If it returns an address on which the connection does not exist, gRPC + // internals treats it as an error and will fail the corresponding RPC. + // + // Therefore, the following is the recommended rule when writing a custom Balancer. + // If opts.BlockingWait is true, it should return a connected address or + // block if there is no connected address. It should respect the timeout or + // cancellation of ctx when blocking. If opts.BlockingWait is false (for fail-fast + // RPCs), it should return an address it has notified via Notify(...) immediately + // instead of blocking. + // + // The function returns put which is called once the rpc has completed or failed. + // put can collect and report RPC stats to a remote load balancer. + // + // This function should only return the errors Balancer cannot recover by itself. + // gRPC internals will fail the RPC if an error is returned. + Get(ctx context.Context, opts BalancerGetOptions) (addr Address, put func(), err error) + // Notify returns a channel that is used by gRPC internals to watch the addresses + // gRPC needs to connect. The addresses might be from a name resolver or remote + // load balancer. gRPC internals will compare it with the existing connected + // addresses. If the address Balancer notified is not in the existing connected + // addresses, gRPC starts to connect the address. If an address in the existing + // connected addresses is not in the notification list, the corresponding connection + // is shutdown gracefully. Otherwise, there are no operations to take. Note that + // the Address slice must be the full list of the Addresses which should be connected. + // It is NOT delta. + Notify() <-chan []Address + // Close shuts down the balancer. + Close() error +} + +// downErr implements net.Error. It is constructed by gRPC internals and passed to the down +// call of Balancer. +type downErr struct { + timeout bool + temporary bool + desc string +} + +func (e downErr) Error() string { return e.desc } +func (e downErr) Timeout() bool { return e.timeout } +func (e downErr) Temporary() bool { return e.temporary } + +func downErrorf(timeout, temporary bool, format string, a ...interface{}) downErr { + return downErr{ + timeout: timeout, + temporary: temporary, + desc: fmt.Sprintf(format, a...), + } +} + +// RoundRobin returns a Balancer that selects addresses round-robin. It uses r to watch +// the name resolution updates and updates the addresses available correspondingly. +func RoundRobin(r naming.Resolver) Balancer { + return &roundRobin{r: r} +} + +type addrInfo struct { + addr Address + connected bool +} + +type roundRobin struct { + r naming.Resolver + w naming.Watcher + addrs []*addrInfo // all the addresses the client should potentially connect + mu sync.Mutex + addrCh chan []Address // the channel to notify gRPC internals the list of addresses the client should connect to. + next int // index of the next address to return for Get() + waitCh chan struct{} // the channel to block when there is no connected address available + done bool // The Balancer is closed. +} + +func (rr *roundRobin) watchAddrUpdates() error { + updates, err := rr.w.Next() + if err != nil { + grpclog.Printf("grpc: the naming watcher stops working due to %v.\n", err) + return err + } + rr.mu.Lock() + defer rr.mu.Unlock() + for _, update := range updates { + addr := Address{ + Addr: update.Addr, + Metadata: update.Metadata, + } + switch update.Op { + case naming.Add: + var exist bool + for _, v := range rr.addrs { + if addr == v.addr { + exist = true + grpclog.Println("grpc: The name resolver wanted to add an existing address: ", addr) + break + } + } + if exist { + continue + } + rr.addrs = append(rr.addrs, &addrInfo{addr: addr}) + case naming.Delete: + for i, v := range rr.addrs { + if addr == v.addr { + copy(rr.addrs[i:], rr.addrs[i+1:]) + rr.addrs = rr.addrs[:len(rr.addrs)-1] + break + } + } + default: + grpclog.Println("Unknown update.Op ", update.Op) + } + } + // Make a copy of rr.addrs and write it onto rr.addrCh so that gRPC internals gets notified. + open := make([]Address, len(rr.addrs)) + for i, v := range rr.addrs { + open[i] = v.addr + } + if rr.done { + return ErrClientConnClosing + } + rr.addrCh <- open + return nil +} + +func (rr *roundRobin) Start(target string, config BalancerConfig) error { + rr.mu.Lock() + defer rr.mu.Unlock() + if rr.done { + return ErrClientConnClosing + } + if rr.r == nil { + // If there is no name resolver installed, it is not needed to + // do name resolution. In this case, target is added into rr.addrs + // as the only address available and rr.addrCh stays nil. + rr.addrs = append(rr.addrs, &addrInfo{addr: Address{Addr: target}}) + return nil + } + w, err := rr.r.Resolve(target) + if err != nil { + return err + } + rr.w = w + rr.addrCh = make(chan []Address) + go func() { + for { + if err := rr.watchAddrUpdates(); err != nil { + return + } + } + }() + return nil +} + +// Up sets the connected state of addr and sends notification if there are pending +// Get() calls. +func (rr *roundRobin) Up(addr Address) func(error) { + rr.mu.Lock() + defer rr.mu.Unlock() + var cnt int + for _, a := range rr.addrs { + if a.addr == addr { + if a.connected { + return nil + } + a.connected = true + } + if a.connected { + cnt++ + } + } + // addr is only one which is connected. Notify the Get() callers who are blocking. + if cnt == 1 && rr.waitCh != nil { + close(rr.waitCh) + rr.waitCh = nil + } + return func(err error) { + rr.down(addr, err) + } +} + +// down unsets the connected state of addr. +func (rr *roundRobin) down(addr Address, err error) { + rr.mu.Lock() + defer rr.mu.Unlock() + for _, a := range rr.addrs { + if addr == a.addr { + a.connected = false + break + } + } +} + +// Get returns the next addr in the rotation. +func (rr *roundRobin) Get(ctx context.Context, opts BalancerGetOptions) (addr Address, put func(), err error) { + var ch chan struct{} + rr.mu.Lock() + if rr.done { + rr.mu.Unlock() + err = ErrClientConnClosing + return + } + + if len(rr.addrs) > 0 { + if rr.next >= len(rr.addrs) { + rr.next = 0 + } + next := rr.next + for { + a := rr.addrs[next] + next = (next + 1) % len(rr.addrs) + if a.connected { + addr = a.addr + rr.next = next + rr.mu.Unlock() + return + } + if next == rr.next { + // Has iterated all the possible address but none is connected. + break + } + } + } + if !opts.BlockingWait { + if len(rr.addrs) == 0 { + rr.mu.Unlock() + err = Errorf(codes.Unavailable, "there is no address available") + return + } + // Returns the next addr on rr.addrs for failfast RPCs. + addr = rr.addrs[rr.next].addr + rr.next++ + rr.mu.Unlock() + return + } + // Wait on rr.waitCh for non-failfast RPCs. + if rr.waitCh == nil { + ch = make(chan struct{}) + rr.waitCh = ch + } else { + ch = rr.waitCh + } + rr.mu.Unlock() + for { + select { + case <-ctx.Done(): + err = ctx.Err() + return + case <-ch: + rr.mu.Lock() + if rr.done { + rr.mu.Unlock() + err = ErrClientConnClosing + return + } + + if len(rr.addrs) > 0 { + if rr.next >= len(rr.addrs) { + rr.next = 0 + } + next := rr.next + for { + a := rr.addrs[next] + next = (next + 1) % len(rr.addrs) + if a.connected { + addr = a.addr + rr.next = next + rr.mu.Unlock() + return + } + if next == rr.next { + // Has iterated all the possible address but none is connected. + break + } + } + } + // The newly added addr got removed by Down() again. + if rr.waitCh == nil { + ch = make(chan struct{}) + rr.waitCh = ch + } else { + ch = rr.waitCh + } + rr.mu.Unlock() + } + } +} + +func (rr *roundRobin) Notify() <-chan []Address { + return rr.addrCh +} + +func (rr *roundRobin) Close() error { + rr.mu.Lock() + defer rr.mu.Unlock() + rr.done = true + if rr.w != nil { + rr.w.Close() + } + if rr.waitCh != nil { + close(rr.waitCh) + rr.waitCh = nil + } + if rr.addrCh != nil { + close(rr.addrCh) + } + return nil +} diff --git a/vendor/google.golang.org/grpc/call.go b/vendor/google.golang.org/grpc/call.go new file mode 100644 index 0000000..ba17721 --- /dev/null +++ b/vendor/google.golang.org/grpc/call.go @@ -0,0 +1,286 @@ +/* + * + * Copyright 2014, Google Inc. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are + * met: + * + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following disclaimer + * in the documentation and/or other materials provided with the + * distribution. + * * Neither the name of Google Inc. nor the names of its + * contributors may be used to endorse or promote products derived from + * this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT + * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * + */ + +package grpc + +import ( + "bytes" + "io" + "math" + "time" + + "golang.org/x/net/context" + "golang.org/x/net/trace" + "google.golang.org/grpc/codes" + "google.golang.org/grpc/stats" + "google.golang.org/grpc/transport" +) + +// recvResponse receives and parses an RPC response. +// On error, it returns the error and indicates whether the call should be retried. +// +// TODO(zhaoq): Check whether the received message sequence is valid. +// TODO ctx is used for stats collection and processing. It is the context passed from the application. +func recvResponse(ctx context.Context, dopts dialOptions, t transport.ClientTransport, c *callInfo, stream *transport.Stream, reply interface{}) (err error) { + // Try to acquire header metadata from the server if there is any. + defer func() { + if err != nil { + if _, ok := err.(transport.ConnectionError); !ok { + t.CloseStream(stream, err) + } + } + }() + c.headerMD, err = stream.Header() + if err != nil { + return + } + p := &parser{r: stream} + var inPayload *stats.InPayload + if dopts.copts.StatsHandler != nil { + inPayload = &stats.InPayload{ + Client: true, + } + } + for { + if err = recv(p, dopts.codec, stream, dopts.dc, reply, math.MaxInt32, inPayload); err != nil { + if err == io.EOF { + break + } + return + } + } + if inPayload != nil && err == io.EOF && stream.StatusCode() == codes.OK { + // TODO in the current implementation, inTrailer may be handled before inPayload in some cases. + // Fix the order if necessary. + dopts.copts.StatsHandler.HandleRPC(ctx, inPayload) + } + c.trailerMD = stream.Trailer() + return nil +} + +// sendRequest writes out various information of an RPC such as Context and Message. +func sendRequest(ctx context.Context, dopts dialOptions, compressor Compressor, callHdr *transport.CallHdr, t transport.ClientTransport, args interface{}, opts *transport.Options) (_ *transport.Stream, err error) { + stream, err := t.NewStream(ctx, callHdr) + if err != nil { + return nil, err + } + defer func() { + if err != nil { + // If err is connection error, t will be closed, no need to close stream here. + if _, ok := err.(transport.ConnectionError); !ok { + t.CloseStream(stream, err) + } + } + }() + var ( + cbuf *bytes.Buffer + outPayload *stats.OutPayload + ) + if compressor != nil { + cbuf = new(bytes.Buffer) + } + if dopts.copts.StatsHandler != nil { + outPayload = &stats.OutPayload{ + Client: true, + } + } + outBuf, err := encode(dopts.codec, args, compressor, cbuf, outPayload) + if err != nil { + return nil, Errorf(codes.Internal, "grpc: %v", err) + } + err = t.Write(stream, outBuf, opts) + if err == nil && outPayload != nil { + outPayload.SentTime = time.Now() + dopts.copts.StatsHandler.HandleRPC(ctx, outPayload) + } + // t.NewStream(...) could lead to an early rejection of the RPC (e.g., the service/method + // does not exist.) so that t.Write could get io.EOF from wait(...). Leave the following + // recvResponse to get the final status. + if err != nil && err != io.EOF { + return nil, err + } + // Sent successfully. + return stream, nil +} + +// Invoke sends the RPC request on the wire and returns after response is received. +// Invoke is called by generated code. Also users can call Invoke directly when it +// is really needed in their use cases. +func Invoke(ctx context.Context, method string, args, reply interface{}, cc *ClientConn, opts ...CallOption) error { + if cc.dopts.unaryInt != nil { + return cc.dopts.unaryInt(ctx, method, args, reply, cc, invoke, opts...) + } + return invoke(ctx, method, args, reply, cc, opts...) +} + +func invoke(ctx context.Context, method string, args, reply interface{}, cc *ClientConn, opts ...CallOption) (e error) { + c := defaultCallInfo + if mc, ok := cc.getMethodConfig(method); ok { + c.failFast = !mc.WaitForReady + if mc.Timeout > 0 { + var cancel context.CancelFunc + ctx, cancel = context.WithTimeout(ctx, mc.Timeout) + defer cancel() + } + } + for _, o := range opts { + if err := o.before(&c); err != nil { + return toRPCErr(err) + } + } + defer func() { + for _, o := range opts { + o.after(&c) + } + }() + if EnableTracing { + c.traceInfo.tr = trace.New("grpc.Sent."+methodFamily(method), method) + defer c.traceInfo.tr.Finish() + c.traceInfo.firstLine.client = true + if deadline, ok := ctx.Deadline(); ok { + c.traceInfo.firstLine.deadline = deadline.Sub(time.Now()) + } + c.traceInfo.tr.LazyLog(&c.traceInfo.firstLine, false) + // TODO(dsymonds): Arrange for c.traceInfo.firstLine.remoteAddr to be set. + defer func() { + if e != nil { + c.traceInfo.tr.LazyLog(&fmtStringer{"%v", []interface{}{e}}, true) + c.traceInfo.tr.SetError() + } + }() + } + sh := cc.dopts.copts.StatsHandler + if sh != nil { + ctx = sh.TagRPC(ctx, &stats.RPCTagInfo{FullMethodName: method}) + begin := &stats.Begin{ + Client: true, + BeginTime: time.Now(), + FailFast: c.failFast, + } + sh.HandleRPC(ctx, begin) + } + defer func() { + if sh != nil { + end := &stats.End{ + Client: true, + EndTime: time.Now(), + Error: e, + } + sh.HandleRPC(ctx, end) + } + }() + topts := &transport.Options{ + Last: true, + Delay: false, + } + for { + var ( + err error + t transport.ClientTransport + stream *transport.Stream + // Record the put handler from Balancer.Get(...). It is called once the + // RPC has completed or failed. + put func() + ) + // TODO(zhaoq): Need a formal spec of fail-fast. + callHdr := &transport.CallHdr{ + Host: cc.authority, + Method: method, + } + if cc.dopts.cp != nil { + callHdr.SendCompress = cc.dopts.cp.Type() + } + + gopts := BalancerGetOptions{ + BlockingWait: !c.failFast, + } + t, put, err = cc.getTransport(ctx, gopts) + if err != nil { + // TODO(zhaoq): Probably revisit the error handling. + if _, ok := err.(*rpcError); ok { + return err + } + if err == errConnClosing || err == errConnUnavailable { + if c.failFast { + return Errorf(codes.Unavailable, "%v", err) + } + continue + } + // All the other errors are treated as Internal errors. + return Errorf(codes.Internal, "%v", err) + } + if c.traceInfo.tr != nil { + c.traceInfo.tr.LazyLog(&payload{sent: true, msg: args}, true) + } + stream, err = sendRequest(ctx, cc.dopts, cc.dopts.cp, callHdr, t, args, topts) + if err != nil { + if put != nil { + put() + put = nil + } + // Retry a non-failfast RPC when + // i) there is a connection error; or + // ii) the server started to drain before this RPC was initiated. + if _, ok := err.(transport.ConnectionError); ok || err == transport.ErrStreamDrain { + if c.failFast { + return toRPCErr(err) + } + continue + } + return toRPCErr(err) + } + err = recvResponse(ctx, cc.dopts, t, &c, stream, reply) + if err != nil { + if put != nil { + put() + put = nil + } + if _, ok := err.(transport.ConnectionError); ok || err == transport.ErrStreamDrain { + if c.failFast { + return toRPCErr(err) + } + continue + } + return toRPCErr(err) + } + if c.traceInfo.tr != nil { + c.traceInfo.tr.LazyLog(&payload{sent: false, msg: reply}, true) + } + t.CloseStream(stream, nil) + if put != nil { + put() + put = nil + } + return Errorf(stream.StatusCode(), "%s", stream.StatusDesc()) + } +} diff --git a/vendor/google.golang.org/grpc/clientconn.go b/vendor/google.golang.org/grpc/clientconn.go new file mode 100644 index 0000000..146166a --- /dev/null +++ b/vendor/google.golang.org/grpc/clientconn.go @@ -0,0 +1,965 @@ +/* + * + * Copyright 2014, Google Inc. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are + * met: + * + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following disclaimer + * in the documentation and/or other materials provided with the + * distribution. + * * Neither the name of Google Inc. nor the names of its + * contributors may be used to endorse or promote products derived from + * this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT + * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * + */ + +package grpc + +import ( + "errors" + "fmt" + "net" + "strings" + "sync" + "time" + + "golang.org/x/net/context" + "golang.org/x/net/trace" + "google.golang.org/grpc/credentials" + "google.golang.org/grpc/grpclog" + "google.golang.org/grpc/stats" + "google.golang.org/grpc/transport" +) + +var ( + // ErrClientConnClosing indicates that the operation is illegal because + // the ClientConn is closing. + ErrClientConnClosing = errors.New("grpc: the client connection is closing") + // ErrClientConnTimeout indicates that the ClientConn cannot establish the + // underlying connections within the specified timeout. + // DEPRECATED: Please use context.DeadlineExceeded instead. This error will be + // removed in Q1 2017. + ErrClientConnTimeout = errors.New("grpc: timed out when dialing") + + // errNoTransportSecurity indicates that there is no transport security + // being set for ClientConn. Users should either set one or explicitly + // call WithInsecure DialOption to disable security. + errNoTransportSecurity = errors.New("grpc: no transport security set (use grpc.WithInsecure() explicitly or set credentials)") + // errTransportCredentialsMissing indicates that users want to transmit security + // information (e.g., oauth2 token) which requires secure connection on an insecure + // connection. + errTransportCredentialsMissing = errors.New("grpc: the credentials require transport level security (use grpc.WithTransportCredentials() to set)") + // errCredentialsConflict indicates that grpc.WithTransportCredentials() + // and grpc.WithInsecure() are both called for a connection. + errCredentialsConflict = errors.New("grpc: transport credentials are set for an insecure connection (grpc.WithTransportCredentials() and grpc.WithInsecure() are both called)") + // errNetworkIO indicates that the connection is down due to some network I/O error. + errNetworkIO = errors.New("grpc: failed with network I/O error") + // errConnDrain indicates that the connection starts to be drained and does not accept any new RPCs. + errConnDrain = errors.New("grpc: the connection is drained") + // errConnClosing indicates that the connection is closing. + errConnClosing = errors.New("grpc: the connection is closing") + // errConnUnavailable indicates that the connection is unavailable. + errConnUnavailable = errors.New("grpc: the connection is unavailable") + errNoAddr = errors.New("grpc: there is no address available to dial") + // minimum time to give a connection to complete + minConnectTimeout = 20 * time.Second +) + +// dialOptions configure a Dial call. dialOptions are set by the DialOption +// values passed to Dial. +type dialOptions struct { + unaryInt UnaryClientInterceptor + streamInt StreamClientInterceptor + codec Codec + cp Compressor + dc Decompressor + bs backoffStrategy + balancer Balancer + block bool + insecure bool + timeout time.Duration + scChan <-chan ServiceConfig + copts transport.ConnectOptions +} + +// DialOption configures how we set up the connection. +type DialOption func(*dialOptions) + +// WithCodec returns a DialOption which sets a codec for message marshaling and unmarshaling. +func WithCodec(c Codec) DialOption { + return func(o *dialOptions) { + o.codec = c + } +} + +// WithCompressor returns a DialOption which sets a CompressorGenerator for generating message +// compressor. +func WithCompressor(cp Compressor) DialOption { + return func(o *dialOptions) { + o.cp = cp + } +} + +// WithDecompressor returns a DialOption which sets a DecompressorGenerator for generating +// message decompressor. +func WithDecompressor(dc Decompressor) DialOption { + return func(o *dialOptions) { + o.dc = dc + } +} + +// WithBalancer returns a DialOption which sets a load balancer. +func WithBalancer(b Balancer) DialOption { + return func(o *dialOptions) { + o.balancer = b + } +} + +// WithServiceConfig returns a DialOption which has a channel to read the service configuration. +func WithServiceConfig(c <-chan ServiceConfig) DialOption { + return func(o *dialOptions) { + o.scChan = c + } +} + +// WithBackoffMaxDelay configures the dialer to use the provided maximum delay +// when backing off after failed connection attempts. +func WithBackoffMaxDelay(md time.Duration) DialOption { + return WithBackoffConfig(BackoffConfig{MaxDelay: md}) +} + +// WithBackoffConfig configures the dialer to use the provided backoff +// parameters after connection failures. +// +// Use WithBackoffMaxDelay until more parameters on BackoffConfig are opened up +// for use. +func WithBackoffConfig(b BackoffConfig) DialOption { + // Set defaults to ensure that provided BackoffConfig is valid and + // unexported fields get default values. + setDefaults(&b) + return withBackoff(b) +} + +// withBackoff sets the backoff strategy used for retries after a +// failed connection attempt. +// +// This can be exported if arbitrary backoff strategies are allowed by gRPC. +func withBackoff(bs backoffStrategy) DialOption { + return func(o *dialOptions) { + o.bs = bs + } +} + +// WithBlock returns a DialOption which makes caller of Dial blocks until the underlying +// connection is up. Without this, Dial returns immediately and connecting the server +// happens in background. +func WithBlock() DialOption { + return func(o *dialOptions) { + o.block = true + } +} + +// WithInsecure returns a DialOption which disables transport security for this ClientConn. +// Note that transport security is required unless WithInsecure is set. +func WithInsecure() DialOption { + return func(o *dialOptions) { + o.insecure = true + } +} + +// WithTransportCredentials returns a DialOption which configures a +// connection level security credentials (e.g., TLS/SSL). +func WithTransportCredentials(creds credentials.TransportCredentials) DialOption { + return func(o *dialOptions) { + o.copts.TransportCredentials = creds + } +} + +// WithPerRPCCredentials returns a DialOption which sets +// credentials which will place auth state on each outbound RPC. +func WithPerRPCCredentials(creds credentials.PerRPCCredentials) DialOption { + return func(o *dialOptions) { + o.copts.PerRPCCredentials = append(o.copts.PerRPCCredentials, creds) + } +} + +// WithTimeout returns a DialOption that configures a timeout for dialing a ClientConn +// initially. This is valid if and only if WithBlock() is present. +func WithTimeout(d time.Duration) DialOption { + return func(o *dialOptions) { + o.timeout = d + } +} + +// WithDialer returns a DialOption that specifies a function to use for dialing network addresses. +// If FailOnNonTempDialError() is set to true, and an error is returned by f, gRPC checks the error's +// Temporary() method to decide if it should try to reconnect to the network address. +func WithDialer(f func(string, time.Duration) (net.Conn, error)) DialOption { + return func(o *dialOptions) { + o.copts.Dialer = func(ctx context.Context, addr string) (net.Conn, error) { + if deadline, ok := ctx.Deadline(); ok { + return f(addr, deadline.Sub(time.Now())) + } + return f(addr, 0) + } + } +} + +// WithStatsHandler returns a DialOption that specifies the stats handler +// for all the RPCs and underlying network connections in this ClientConn. +func WithStatsHandler(h stats.Handler) DialOption { + return func(o *dialOptions) { + o.copts.StatsHandler = h + } +} + +// FailOnNonTempDialError returns a DialOption that specified if gRPC fails on non-temporary dial errors. +// If f is true, and dialer returns a non-temporary error, gRPC will fail the connection to the network +// address and won't try to reconnect. +// The default value of FailOnNonTempDialError is false. +// This is an EXPERIMENTAL API. +func FailOnNonTempDialError(f bool) DialOption { + return func(o *dialOptions) { + o.copts.FailOnNonTempDialError = f + } +} + +// WithUserAgent returns a DialOption that specifies a user agent string for all the RPCs. +func WithUserAgent(s string) DialOption { + return func(o *dialOptions) { + o.copts.UserAgent = s + } +} + +// WithUnaryInterceptor returns a DialOption that specifies the interceptor for unary RPCs. +func WithUnaryInterceptor(f UnaryClientInterceptor) DialOption { + return func(o *dialOptions) { + o.unaryInt = f + } +} + +// WithStreamInterceptor returns a DialOption that specifies the interceptor for streaming RPCs. +func WithStreamInterceptor(f StreamClientInterceptor) DialOption { + return func(o *dialOptions) { + o.streamInt = f + } +} + +// Dial creates a client connection to the given target. +func Dial(target string, opts ...DialOption) (*ClientConn, error) { + return DialContext(context.Background(), target, opts...) +} + +// DialContext creates a client connection to the given target. ctx can be used to +// cancel or expire the pending connecting. Once this function returns, the +// cancellation and expiration of ctx will be noop. Users should call ClientConn.Close +// to terminate all the pending operations after this function returns. +// This is the EXPERIMENTAL API. +func DialContext(ctx context.Context, target string, opts ...DialOption) (conn *ClientConn, err error) { + cc := &ClientConn{ + target: target, + conns: make(map[Address]*addrConn), + } + cc.ctx, cc.cancel = context.WithCancel(context.Background()) + for _, opt := range opts { + opt(&cc.dopts) + } + if cc.dopts.timeout > 0 { + var cancel context.CancelFunc + ctx, cancel = context.WithTimeout(ctx, cc.dopts.timeout) + defer cancel() + } + + defer func() { + select { + case <-ctx.Done(): + conn, err = nil, ctx.Err() + default: + } + + if err != nil { + cc.Close() + } + }() + + if cc.dopts.scChan != nil { + // Wait for the initial service config. + select { + case sc, ok := <-cc.dopts.scChan: + if ok { + cc.sc = sc + } + case <-ctx.Done(): + return nil, ctx.Err() + } + } + // Set defaults. + if cc.dopts.codec == nil { + cc.dopts.codec = protoCodec{} + } + if cc.dopts.bs == nil { + cc.dopts.bs = DefaultBackoffConfig + } + creds := cc.dopts.copts.TransportCredentials + if creds != nil && creds.Info().ServerName != "" { + cc.authority = creds.Info().ServerName + } else { + colonPos := strings.LastIndex(target, ":") + if colonPos == -1 { + colonPos = len(target) + } + cc.authority = target[:colonPos] + } + var ok bool + waitC := make(chan error, 1) + go func() { + var addrs []Address + if cc.dopts.balancer == nil && cc.sc.LB != nil { + cc.dopts.balancer = cc.sc.LB + } + if cc.dopts.balancer == nil { + // Connect to target directly if balancer is nil. + addrs = append(addrs, Address{Addr: target}) + } else { + var credsClone credentials.TransportCredentials + if creds != nil { + credsClone = creds.Clone() + } + config := BalancerConfig{ + DialCreds: credsClone, + } + if err := cc.dopts.balancer.Start(target, config); err != nil { + waitC <- err + return + } + ch := cc.dopts.balancer.Notify() + if ch == nil { + // There is no name resolver installed. + addrs = append(addrs, Address{Addr: target}) + } else { + addrs, ok = <-ch + if !ok || len(addrs) == 0 { + waitC <- errNoAddr + return + } + } + } + for _, a := range addrs { + if err := cc.resetAddrConn(a, false, nil); err != nil { + waitC <- err + return + } + } + close(waitC) + }() + select { + case <-ctx.Done(): + return nil, ctx.Err() + case err := <-waitC: + if err != nil { + return nil, err + } + } + + // If balancer is nil or balancer.Notify() is nil, ok will be false here. + // The lbWatcher goroutine will not be created. + if ok { + go cc.lbWatcher() + } + + if cc.dopts.scChan != nil { + go cc.scWatcher() + } + return cc, nil +} + +// ConnectivityState indicates the state of a client connection. +type ConnectivityState int + +const ( + // Idle indicates the ClientConn is idle. + Idle ConnectivityState = iota + // Connecting indicates the ClienConn is connecting. + Connecting + // Ready indicates the ClientConn is ready for work. + Ready + // TransientFailure indicates the ClientConn has seen a failure but expects to recover. + TransientFailure + // Shutdown indicates the ClientConn has started shutting down. + Shutdown +) + +func (s ConnectivityState) String() string { + switch s { + case Idle: + return "IDLE" + case Connecting: + return "CONNECTING" + case Ready: + return "READY" + case TransientFailure: + return "TRANSIENT_FAILURE" + case Shutdown: + return "SHUTDOWN" + default: + panic(fmt.Sprintf("unknown connectivity state: %d", s)) + } +} + +// ClientConn represents a client connection to an RPC server. +type ClientConn struct { + ctx context.Context + cancel context.CancelFunc + + target string + authority string + dopts dialOptions + + mu sync.RWMutex + sc ServiceConfig + conns map[Address]*addrConn +} + +func (cc *ClientConn) lbWatcher() { + for addrs := range cc.dopts.balancer.Notify() { + var ( + add []Address // Addresses need to setup connections. + del []*addrConn // Connections need to tear down. + ) + cc.mu.Lock() + for _, a := range addrs { + if _, ok := cc.conns[a]; !ok { + add = append(add, a) + } + } + for k, c := range cc.conns { + var keep bool + for _, a := range addrs { + if k == a { + keep = true + break + } + } + if !keep { + del = append(del, c) + delete(cc.conns, c.addr) + } + } + cc.mu.Unlock() + for _, a := range add { + cc.resetAddrConn(a, true, nil) + } + for _, c := range del { + c.tearDown(errConnDrain) + } + } +} + +func (cc *ClientConn) scWatcher() { + for { + select { + case sc, ok := <-cc.dopts.scChan: + if !ok { + return + } + cc.mu.Lock() + // TODO: load balance policy runtime change is ignored. + // We may revist this decision in the future. + cc.sc = sc + cc.mu.Unlock() + case <-cc.ctx.Done(): + return + } + } +} + +// resetAddrConn creates an addrConn for addr and adds it to cc.conns. +// If there is an old addrConn for addr, it will be torn down, using tearDownErr as the reason. +// If tearDownErr is nil, errConnDrain will be used instead. +func (cc *ClientConn) resetAddrConn(addr Address, skipWait bool, tearDownErr error) error { + ac := &addrConn{ + cc: cc, + addr: addr, + dopts: cc.dopts, + } + ac.ctx, ac.cancel = context.WithCancel(cc.ctx) + ac.stateCV = sync.NewCond(&ac.mu) + if EnableTracing { + ac.events = trace.NewEventLog("grpc.ClientConn", ac.addr.Addr) + } + if !ac.dopts.insecure { + if ac.dopts.copts.TransportCredentials == nil { + return errNoTransportSecurity + } + } else { + if ac.dopts.copts.TransportCredentials != nil { + return errCredentialsConflict + } + for _, cd := range ac.dopts.copts.PerRPCCredentials { + if cd.RequireTransportSecurity() { + return errTransportCredentialsMissing + } + } + } + // Track ac in cc. This needs to be done before any getTransport(...) is called. + cc.mu.Lock() + if cc.conns == nil { + cc.mu.Unlock() + return ErrClientConnClosing + } + stale := cc.conns[ac.addr] + cc.conns[ac.addr] = ac + cc.mu.Unlock() + if stale != nil { + // There is an addrConn alive on ac.addr already. This could be due to + // 1) a buggy Balancer notifies duplicated Addresses; + // 2) goaway was received, a new ac will replace the old ac. + // The old ac should be deleted from cc.conns, but the + // underlying transport should drain rather than close. + if tearDownErr == nil { + // tearDownErr is nil if resetAddrConn is called by + // 1) Dial + // 2) lbWatcher + // In both cases, the stale ac should drain, not close. + stale.tearDown(errConnDrain) + } else { + stale.tearDown(tearDownErr) + } + } + // skipWait may overwrite the decision in ac.dopts.block. + if ac.dopts.block && !skipWait { + if err := ac.resetTransport(false); err != nil { + if err != errConnClosing { + // Tear down ac and delete it from cc.conns. + cc.mu.Lock() + delete(cc.conns, ac.addr) + cc.mu.Unlock() + ac.tearDown(err) + } + if e, ok := err.(transport.ConnectionError); ok && !e.Temporary() { + return e.Origin() + } + return err + } + // Start to monitor the error status of transport. + go ac.transportMonitor() + } else { + // Start a goroutine connecting to the server asynchronously. + go func() { + if err := ac.resetTransport(false); err != nil { + grpclog.Printf("Failed to dial %s: %v; please retry.", ac.addr.Addr, err) + if err != errConnClosing { + // Keep this ac in cc.conns, to get the reason it's torn down. + ac.tearDown(err) + } + return + } + ac.transportMonitor() + }() + } + return nil +} + +// TODO: Avoid the locking here. +func (cc *ClientConn) getMethodConfig(method string) (m MethodConfig, ok bool) { + cc.mu.RLock() + defer cc.mu.RUnlock() + m, ok = cc.sc.Methods[method] + return +} + +func (cc *ClientConn) getTransport(ctx context.Context, opts BalancerGetOptions) (transport.ClientTransport, func(), error) { + var ( + ac *addrConn + ok bool + put func() + ) + if cc.dopts.balancer == nil { + // If balancer is nil, there should be only one addrConn available. + cc.mu.RLock() + if cc.conns == nil { + cc.mu.RUnlock() + return nil, nil, toRPCErr(ErrClientConnClosing) + } + for _, ac = range cc.conns { + // Break after the first iteration to get the first addrConn. + ok = true + break + } + cc.mu.RUnlock() + } else { + var ( + addr Address + err error + ) + addr, put, err = cc.dopts.balancer.Get(ctx, opts) + if err != nil { + return nil, nil, toRPCErr(err) + } + cc.mu.RLock() + if cc.conns == nil { + cc.mu.RUnlock() + return nil, nil, toRPCErr(ErrClientConnClosing) + } + ac, ok = cc.conns[addr] + cc.mu.RUnlock() + } + if !ok { + if put != nil { + put() + } + return nil, nil, errConnClosing + } + t, err := ac.wait(ctx, cc.dopts.balancer != nil, !opts.BlockingWait) + if err != nil { + if put != nil { + put() + } + return nil, nil, err + } + return t, put, nil +} + +// Close tears down the ClientConn and all underlying connections. +func (cc *ClientConn) Close() error { + cc.cancel() + + cc.mu.Lock() + if cc.conns == nil { + cc.mu.Unlock() + return ErrClientConnClosing + } + conns := cc.conns + cc.conns = nil + cc.mu.Unlock() + if cc.dopts.balancer != nil { + cc.dopts.balancer.Close() + } + for _, ac := range conns { + ac.tearDown(ErrClientConnClosing) + } + return nil +} + +// addrConn is a network connection to a given address. +type addrConn struct { + ctx context.Context + cancel context.CancelFunc + + cc *ClientConn + addr Address + dopts dialOptions + events trace.EventLog + + mu sync.Mutex + state ConnectivityState + stateCV *sync.Cond + down func(error) // the handler called when a connection is down. + // ready is closed and becomes nil when a new transport is up or failed + // due to timeout. + ready chan struct{} + transport transport.ClientTransport + + // The reason this addrConn is torn down. + tearDownErr error +} + +// printf records an event in ac's event log, unless ac has been closed. +// REQUIRES ac.mu is held. +func (ac *addrConn) printf(format string, a ...interface{}) { + if ac.events != nil { + ac.events.Printf(format, a...) + } +} + +// errorf records an error in ac's event log, unless ac has been closed. +// REQUIRES ac.mu is held. +func (ac *addrConn) errorf(format string, a ...interface{}) { + if ac.events != nil { + ac.events.Errorf(format, a...) + } +} + +// getState returns the connectivity state of the Conn +func (ac *addrConn) getState() ConnectivityState { + ac.mu.Lock() + defer ac.mu.Unlock() + return ac.state +} + +// waitForStateChange blocks until the state changes to something other than the sourceState. +func (ac *addrConn) waitForStateChange(ctx context.Context, sourceState ConnectivityState) (ConnectivityState, error) { + ac.mu.Lock() + defer ac.mu.Unlock() + if sourceState != ac.state { + return ac.state, nil + } + done := make(chan struct{}) + var err error + go func() { + select { + case <-ctx.Done(): + ac.mu.Lock() + err = ctx.Err() + ac.stateCV.Broadcast() + ac.mu.Unlock() + case <-done: + } + }() + defer close(done) + for sourceState == ac.state { + ac.stateCV.Wait() + if err != nil { + return ac.state, err + } + } + return ac.state, nil +} + +func (ac *addrConn) resetTransport(closeTransport bool) error { + for retries := 0; ; retries++ { + ac.mu.Lock() + ac.printf("connecting") + if ac.state == Shutdown { + // ac.tearDown(...) has been invoked. + ac.mu.Unlock() + return errConnClosing + } + if ac.down != nil { + ac.down(downErrorf(false, true, "%v", errNetworkIO)) + ac.down = nil + } + ac.state = Connecting + ac.stateCV.Broadcast() + t := ac.transport + ac.mu.Unlock() + if closeTransport && t != nil { + t.Close() + } + sleepTime := ac.dopts.bs.backoff(retries) + timeout := minConnectTimeout + if timeout < sleepTime { + timeout = sleepTime + } + ctx, cancel := context.WithTimeout(ac.ctx, timeout) + connectTime := time.Now() + sinfo := transport.TargetInfo{ + Addr: ac.addr.Addr, + Metadata: ac.addr.Metadata, + } + newTransport, err := transport.NewClientTransport(ctx, sinfo, ac.dopts.copts) + if err != nil { + cancel() + + if e, ok := err.(transport.ConnectionError); ok && !e.Temporary() { + return err + } + grpclog.Printf("grpc: addrConn.resetTransport failed to create client transport: %v; Reconnecting to %v", err, ac.addr) + ac.mu.Lock() + if ac.state == Shutdown { + // ac.tearDown(...) has been invoked. + ac.mu.Unlock() + return errConnClosing + } + ac.errorf("transient failure: %v", err) + ac.state = TransientFailure + ac.stateCV.Broadcast() + if ac.ready != nil { + close(ac.ready) + ac.ready = nil + } + ac.mu.Unlock() + closeTransport = false + select { + case <-time.After(sleepTime - time.Since(connectTime)): + case <-ac.ctx.Done(): + return ac.ctx.Err() + } + continue + } + ac.mu.Lock() + ac.printf("ready") + if ac.state == Shutdown { + // ac.tearDown(...) has been invoked. + ac.mu.Unlock() + newTransport.Close() + return errConnClosing + } + ac.state = Ready + ac.stateCV.Broadcast() + ac.transport = newTransport + if ac.ready != nil { + close(ac.ready) + ac.ready = nil + } + if ac.cc.dopts.balancer != nil { + ac.down = ac.cc.dopts.balancer.Up(ac.addr) + } + ac.mu.Unlock() + return nil + } +} + +// Run in a goroutine to track the error in transport and create the +// new transport if an error happens. It returns when the channel is closing. +func (ac *addrConn) transportMonitor() { + for { + ac.mu.Lock() + t := ac.transport + ac.mu.Unlock() + select { + // This is needed to detect the teardown when + // the addrConn is idle (i.e., no RPC in flight). + case <-ac.ctx.Done(): + select { + case <-t.Error(): + t.Close() + default: + } + return + case <-t.GoAway(): + // If GoAway happens without any network I/O error, ac is closed without shutting down the + // underlying transport (the transport will be closed when all the pending RPCs finished or + // failed.). + // If GoAway and some network I/O error happen concurrently, ac and its underlying transport + // are closed. + // In both cases, a new ac is created. + select { + case <-t.Error(): + ac.cc.resetAddrConn(ac.addr, true, errNetworkIO) + default: + ac.cc.resetAddrConn(ac.addr, true, errConnDrain) + } + return + case <-t.Error(): + select { + case <-ac.ctx.Done(): + t.Close() + return + case <-t.GoAway(): + ac.cc.resetAddrConn(ac.addr, true, errNetworkIO) + return + default: + } + ac.mu.Lock() + if ac.state == Shutdown { + // ac has been shutdown. + ac.mu.Unlock() + return + } + ac.state = TransientFailure + ac.stateCV.Broadcast() + ac.mu.Unlock() + if err := ac.resetTransport(true); err != nil { + ac.mu.Lock() + ac.printf("transport exiting: %v", err) + ac.mu.Unlock() + grpclog.Printf("grpc: addrConn.transportMonitor exits due to: %v", err) + if err != errConnClosing { + // Keep this ac in cc.conns, to get the reason it's torn down. + ac.tearDown(err) + } + return + } + } + } +} + +// wait blocks until i) the new transport is up or ii) ctx is done or iii) ac is closed or +// iv) transport is in TransientFailure and there is a balancer/failfast is true. +func (ac *addrConn) wait(ctx context.Context, hasBalancer, failfast bool) (transport.ClientTransport, error) { + for { + ac.mu.Lock() + switch { + case ac.state == Shutdown: + if failfast || !hasBalancer { + // RPC is failfast or balancer is nil. This RPC should fail with ac.tearDownErr. + err := ac.tearDownErr + ac.mu.Unlock() + return nil, err + } + ac.mu.Unlock() + return nil, errConnClosing + case ac.state == Ready: + ct := ac.transport + ac.mu.Unlock() + return ct, nil + case ac.state == TransientFailure: + if failfast || hasBalancer { + ac.mu.Unlock() + return nil, errConnUnavailable + } + } + ready := ac.ready + if ready == nil { + ready = make(chan struct{}) + ac.ready = ready + } + ac.mu.Unlock() + select { + case <-ctx.Done(): + return nil, toRPCErr(ctx.Err()) + // Wait until the new transport is ready or failed. + case <-ready: + } + } +} + +// tearDown starts to tear down the addrConn. +// TODO(zhaoq): Make this synchronous to avoid unbounded memory consumption in +// some edge cases (e.g., the caller opens and closes many addrConn's in a +// tight loop. +// tearDown doesn't remove ac from ac.cc.conns. +func (ac *addrConn) tearDown(err error) { + ac.cancel() + + ac.mu.Lock() + defer ac.mu.Unlock() + if ac.down != nil { + ac.down(downErrorf(false, false, "%v", err)) + ac.down = nil + } + if err == errConnDrain && ac.transport != nil { + // GracefulClose(...) may be executed multiple times when + // i) receiving multiple GoAway frames from the server; or + // ii) there are concurrent name resolver/Balancer triggered + // address removal and GoAway. + ac.transport.GracefulClose() + } + if ac.state == Shutdown { + return + } + ac.state = Shutdown + ac.tearDownErr = err + ac.stateCV.Broadcast() + if ac.events != nil { + ac.events.Finish() + ac.events = nil + } + if ac.ready != nil { + close(ac.ready) + ac.ready = nil + } + if ac.transport != nil && err != errConnDrain { + ac.transport.Close() + } + return +} diff --git a/vendor/google.golang.org/grpc/codes/code_string.go b/vendor/google.golang.org/grpc/codes/code_string.go new file mode 100644 index 0000000..e6762d0 --- /dev/null +++ b/vendor/google.golang.org/grpc/codes/code_string.go @@ -0,0 +1,16 @@ +// generated by stringer -type=Code; DO NOT EDIT + +package codes + +import "fmt" + +const _Code_name = "OKCanceledUnknownInvalidArgumentDeadlineExceededNotFoundAlreadyExistsPermissionDeniedResourceExhaustedFailedPreconditionAbortedOutOfRangeUnimplementedInternalUnavailableDataLossUnauthenticated" + +var _Code_index = [...]uint8{0, 2, 10, 17, 32, 48, 56, 69, 85, 102, 120, 127, 137, 150, 158, 169, 177, 192} + +func (i Code) String() string { + if i+1 >= Code(len(_Code_index)) { + return fmt.Sprintf("Code(%d)", i) + } + return _Code_name[_Code_index[i]:_Code_index[i+1]] +} diff --git a/vendor/google.golang.org/grpc/codes/codes.go b/vendor/google.golang.org/grpc/codes/codes.go new file mode 100644 index 0000000..e14b464 --- /dev/null +++ b/vendor/google.golang.org/grpc/codes/codes.go @@ -0,0 +1,159 @@ +/* + * + * Copyright 2014, Google Inc. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are + * met: + * + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following disclaimer + * in the documentation and/or other materials provided with the + * distribution. + * * Neither the name of Google Inc. nor the names of its + * contributors may be used to endorse or promote products derived from + * this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT + * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * + */ + +// Package codes defines the canonical error codes used by gRPC. It is +// consistent across various languages. +package codes // import "google.golang.org/grpc/codes" + +// A Code is an unsigned 32-bit error code as defined in the gRPC spec. +type Code uint32 + +//go:generate stringer -type=Code + +const ( + // OK is returned on success. + OK Code = 0 + + // Canceled indicates the operation was cancelled (typically by the caller). + Canceled Code = 1 + + // Unknown error. An example of where this error may be returned is + // if a Status value received from another address space belongs to + // an error-space that is not known in this address space. Also + // errors raised by APIs that do not return enough error information + // may be converted to this error. + Unknown Code = 2 + + // InvalidArgument indicates client specified an invalid argument. + // Note that this differs from FailedPrecondition. It indicates arguments + // that are problematic regardless of the state of the system + // (e.g., a malformed file name). + InvalidArgument Code = 3 + + // DeadlineExceeded means operation expired before completion. + // For operations that change the state of the system, this error may be + // returned even if the operation has completed successfully. For + // example, a successful response from a server could have been delayed + // long enough for the deadline to expire. + DeadlineExceeded Code = 4 + + // NotFound means some requested entity (e.g., file or directory) was + // not found. + NotFound Code = 5 + + // AlreadyExists means an attempt to create an entity failed because one + // already exists. + AlreadyExists Code = 6 + + // PermissionDenied indicates the caller does not have permission to + // execute the specified operation. It must not be used for rejections + // caused by exhausting some resource (use ResourceExhausted + // instead for those errors). It must not be + // used if the caller cannot be identified (use Unauthenticated + // instead for those errors). + PermissionDenied Code = 7 + + // Unauthenticated indicates the request does not have valid + // authentication credentials for the operation. + Unauthenticated Code = 16 + + // ResourceExhausted indicates some resource has been exhausted, perhaps + // a per-user quota, or perhaps the entire file system is out of space. + ResourceExhausted Code = 8 + + // FailedPrecondition indicates operation was rejected because the + // system is not in a state required for the operation's execution. + // For example, directory to be deleted may be non-empty, an rmdir + // operation is applied to a non-directory, etc. + // + // A litmus test that may help a service implementor in deciding + // between FailedPrecondition, Aborted, and Unavailable: + // (a) Use Unavailable if the client can retry just the failing call. + // (b) Use Aborted if the client should retry at a higher-level + // (e.g., restarting a read-modify-write sequence). + // (c) Use FailedPrecondition if the client should not retry until + // the system state has been explicitly fixed. E.g., if an "rmdir" + // fails because the directory is non-empty, FailedPrecondition + // should be returned since the client should not retry unless + // they have first fixed up the directory by deleting files from it. + // (d) Use FailedPrecondition if the client performs conditional + // REST Get/Update/Delete on a resource and the resource on the + // server does not match the condition. E.g., conflicting + // read-modify-write on the same resource. + FailedPrecondition Code = 9 + + // Aborted indicates the operation was aborted, typically due to a + // concurrency issue like sequencer check failures, transaction aborts, + // etc. + // + // See litmus test above for deciding between FailedPrecondition, + // Aborted, and Unavailable. + Aborted Code = 10 + + // OutOfRange means operation was attempted past the valid range. + // E.g., seeking or reading past end of file. + // + // Unlike InvalidArgument, this error indicates a problem that may + // be fixed if the system state changes. For example, a 32-bit file + // system will generate InvalidArgument if asked to read at an + // offset that is not in the range [0,2^32-1], but it will generate + // OutOfRange if asked to read from an offset past the current + // file size. + // + // There is a fair bit of overlap between FailedPrecondition and + // OutOfRange. We recommend using OutOfRange (the more specific + // error) when it applies so that callers who are iterating through + // a space can easily look for an OutOfRange error to detect when + // they are done. + OutOfRange Code = 11 + + // Unimplemented indicates operation is not implemented or not + // supported/enabled in this service. + Unimplemented Code = 12 + + // Internal errors. Means some invariants expected by underlying + // system has been broken. If you see one of these errors, + // something is very broken. + Internal Code = 13 + + // Unavailable indicates the service is currently unavailable. + // This is a most likely a transient condition and may be corrected + // by retrying with a backoff. + // + // See litmus test above for deciding between FailedPrecondition, + // Aborted, and Unavailable. + Unavailable Code = 14 + + // DataLoss indicates unrecoverable data loss or corruption. + DataLoss Code = 15 +) diff --git a/vendor/google.golang.org/grpc/credentials/credentials.go b/vendor/google.golang.org/grpc/credentials/credentials.go new file mode 100644 index 0000000..4d45c3e --- /dev/null +++ b/vendor/google.golang.org/grpc/credentials/credentials.go @@ -0,0 +1,230 @@ +/* + * + * Copyright 2014, Google Inc. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are + * met: + * + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following disclaimer + * in the documentation and/or other materials provided with the + * distribution. + * * Neither the name of Google Inc. nor the names of its + * contributors may be used to endorse or promote products derived from + * this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT + * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * + */ + +// Package credentials implements various credentials supported by gRPC library, +// which encapsulate all the state needed by a client to authenticate with a +// server and make various assertions, e.g., about the client's identity, role, +// or whether it is authorized to make a particular call. +package credentials // import "google.golang.org/grpc/credentials" + +import ( + "crypto/tls" + "crypto/x509" + "errors" + "fmt" + "io/ioutil" + "net" + "strings" + + "golang.org/x/net/context" +) + +var ( + // alpnProtoStr are the specified application level protocols for gRPC. + alpnProtoStr = []string{"h2"} +) + +// PerRPCCredentials defines the common interface for the credentials which need to +// attach security information to every RPC (e.g., oauth2). +type PerRPCCredentials interface { + // GetRequestMetadata gets the current request metadata, refreshing + // tokens if required. This should be called by the transport layer on + // each request, and the data should be populated in headers or other + // context. uri is the URI of the entry point for the request. When + // supported by the underlying implementation, ctx can be used for + // timeout and cancellation. + // TODO(zhaoq): Define the set of the qualified keys instead of leaving + // it as an arbitrary string. + GetRequestMetadata(ctx context.Context, uri ...string) (map[string]string, error) + // RequireTransportSecurity indicates whether the credentials requires + // transport security. + RequireTransportSecurity() bool +} + +// ProtocolInfo provides information regarding the gRPC wire protocol version, +// security protocol, security protocol version in use, server name, etc. +type ProtocolInfo struct { + // ProtocolVersion is the gRPC wire protocol version. + ProtocolVersion string + // SecurityProtocol is the security protocol in use. + SecurityProtocol string + // SecurityVersion is the security protocol version. + SecurityVersion string + // ServerName is the user-configured server name. + ServerName string +} + +// AuthInfo defines the common interface for the auth information the users are interested in. +type AuthInfo interface { + AuthType() string +} + +var ( + // ErrConnDispatched indicates that rawConn has been dispatched out of gRPC + // and the caller should not close rawConn. + ErrConnDispatched = errors.New("credentials: rawConn is dispatched out of gRPC") +) + +// TransportCredentials defines the common interface for all the live gRPC wire +// protocols and supported transport security protocols (e.g., TLS, SSL). +type TransportCredentials interface { + // ClientHandshake does the authentication handshake specified by the corresponding + // authentication protocol on rawConn for clients. It returns the authenticated + // connection and the corresponding auth information about the connection. + // Implementations must use the provided context to implement timely cancellation. + ClientHandshake(context.Context, string, net.Conn) (net.Conn, AuthInfo, error) + // ServerHandshake does the authentication handshake for servers. It returns + // the authenticated connection and the corresponding auth information about + // the connection. + ServerHandshake(net.Conn) (net.Conn, AuthInfo, error) + // Info provides the ProtocolInfo of this TransportCredentials. + Info() ProtocolInfo + // Clone makes a copy of this TransportCredentials. + Clone() TransportCredentials + // OverrideServerName overrides the server name used to verify the hostname on the returned certificates from the server. + // gRPC internals also use it to override the virtual hosting name if it is set. + // It must be called before dialing. Currently, this is only used by grpclb. + OverrideServerName(string) error +} + +// TLSInfo contains the auth information for a TLS authenticated connection. +// It implements the AuthInfo interface. +type TLSInfo struct { + State tls.ConnectionState +} + +// AuthType returns the type of TLSInfo as a string. +func (t TLSInfo) AuthType() string { + return "tls" +} + +// tlsCreds is the credentials required for authenticating a connection using TLS. +type tlsCreds struct { + // TLS configuration + config *tls.Config +} + +func (c tlsCreds) Info() ProtocolInfo { + return ProtocolInfo{ + SecurityProtocol: "tls", + SecurityVersion: "1.2", + ServerName: c.config.ServerName, + } +} + +func (c *tlsCreds) ClientHandshake(ctx context.Context, addr string, rawConn net.Conn) (_ net.Conn, _ AuthInfo, err error) { + // use local cfg to avoid clobbering ServerName if using multiple endpoints + cfg := cloneTLSConfig(c.config) + if cfg.ServerName == "" { + colonPos := strings.LastIndex(addr, ":") + if colonPos == -1 { + colonPos = len(addr) + } + cfg.ServerName = addr[:colonPos] + } + conn := tls.Client(rawConn, cfg) + errChannel := make(chan error, 1) + go func() { + errChannel <- conn.Handshake() + }() + select { + case err := <-errChannel: + if err != nil { + return nil, nil, err + } + case <-ctx.Done(): + return nil, nil, ctx.Err() + } + return conn, TLSInfo{conn.ConnectionState()}, nil +} + +func (c *tlsCreds) ServerHandshake(rawConn net.Conn) (net.Conn, AuthInfo, error) { + conn := tls.Server(rawConn, c.config) + if err := conn.Handshake(); err != nil { + return nil, nil, err + } + return conn, TLSInfo{conn.ConnectionState()}, nil +} + +func (c *tlsCreds) Clone() TransportCredentials { + return NewTLS(c.config) +} + +func (c *tlsCreds) OverrideServerName(serverNameOverride string) error { + c.config.ServerName = serverNameOverride + return nil +} + +// NewTLS uses c to construct a TransportCredentials based on TLS. +func NewTLS(c *tls.Config) TransportCredentials { + tc := &tlsCreds{cloneTLSConfig(c)} + tc.config.NextProtos = alpnProtoStr + return tc +} + +// NewClientTLSFromCert constructs a TLS from the input certificate for client. +// serverNameOverride is for testing only. If set to a non empty string, +// it will override the virtual host name of authority (e.g. :authority header field) in requests. +func NewClientTLSFromCert(cp *x509.CertPool, serverNameOverride string) TransportCredentials { + return NewTLS(&tls.Config{ServerName: serverNameOverride, RootCAs: cp}) +} + +// NewClientTLSFromFile constructs a TLS from the input certificate file for client. +// serverNameOverride is for testing only. If set to a non empty string, +// it will override the virtual host name of authority (e.g. :authority header field) in requests. +func NewClientTLSFromFile(certFile, serverNameOverride string) (TransportCredentials, error) { + b, err := ioutil.ReadFile(certFile) + if err != nil { + return nil, err + } + cp := x509.NewCertPool() + if !cp.AppendCertsFromPEM(b) { + return nil, fmt.Errorf("credentials: failed to append certificates") + } + return NewTLS(&tls.Config{ServerName: serverNameOverride, RootCAs: cp}), nil +} + +// NewServerTLSFromCert constructs a TLS from the input certificate for server. +func NewServerTLSFromCert(cert *tls.Certificate) TransportCredentials { + return NewTLS(&tls.Config{Certificates: []tls.Certificate{*cert}}) +} + +// NewServerTLSFromFile constructs a TLS from the input certificate file and key +// file for server. +func NewServerTLSFromFile(certFile, keyFile string) (TransportCredentials, error) { + cert, err := tls.LoadX509KeyPair(certFile, keyFile) + if err != nil { + return nil, err + } + return NewTLS(&tls.Config{Certificates: []tls.Certificate{cert}}), nil +} diff --git a/vendor/google.golang.org/grpc/credentials/credentials_util_go17.go b/vendor/google.golang.org/grpc/credentials/credentials_util_go17.go new file mode 100644 index 0000000..9647b9e --- /dev/null +++ b/vendor/google.golang.org/grpc/credentials/credentials_util_go17.go @@ -0,0 +1,76 @@ +// +build go1.7 + +/* + * + * Copyright 2016, Google Inc. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are + * met: + * + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following disclaimer + * in the documentation and/or other materials provided with the + * distribution. + * * Neither the name of Google Inc. nor the names of its + * contributors may be used to endorse or promote products derived from + * this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT + * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * + */ + +package credentials + +import ( + "crypto/tls" +) + +// cloneTLSConfig returns a shallow clone of the exported +// fields of cfg, ignoring the unexported sync.Once, which +// contains a mutex and must not be copied. +// +// If cfg is nil, a new zero tls.Config is returned. +// +// TODO replace this function with official clone function. +func cloneTLSConfig(cfg *tls.Config) *tls.Config { + if cfg == nil { + return &tls.Config{} + } + return &tls.Config{ + Rand: cfg.Rand, + Time: cfg.Time, + Certificates: cfg.Certificates, + NameToCertificate: cfg.NameToCertificate, + GetCertificate: cfg.GetCertificate, + RootCAs: cfg.RootCAs, + NextProtos: cfg.NextProtos, + ServerName: cfg.ServerName, + ClientAuth: cfg.ClientAuth, + ClientCAs: cfg.ClientCAs, + InsecureSkipVerify: cfg.InsecureSkipVerify, + CipherSuites: cfg.CipherSuites, + PreferServerCipherSuites: cfg.PreferServerCipherSuites, + SessionTicketsDisabled: cfg.SessionTicketsDisabled, + SessionTicketKey: cfg.SessionTicketKey, + ClientSessionCache: cfg.ClientSessionCache, + MinVersion: cfg.MinVersion, + MaxVersion: cfg.MaxVersion, + CurvePreferences: cfg.CurvePreferences, + DynamicRecordSizingDisabled: cfg.DynamicRecordSizingDisabled, + Renegotiation: cfg.Renegotiation, + } +} diff --git a/vendor/google.golang.org/grpc/credentials/credentials_util_pre_go17.go b/vendor/google.golang.org/grpc/credentials/credentials_util_pre_go17.go new file mode 100644 index 0000000..09b8d12 --- /dev/null +++ b/vendor/google.golang.org/grpc/credentials/credentials_util_pre_go17.go @@ -0,0 +1,74 @@ +// +build !go1.7 + +/* + * + * Copyright 2016, Google Inc. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are + * met: + * + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following disclaimer + * in the documentation and/or other materials provided with the + * distribution. + * * Neither the name of Google Inc. nor the names of its + * contributors may be used to endorse or promote products derived from + * this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT + * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * + */ + +package credentials + +import ( + "crypto/tls" +) + +// cloneTLSConfig returns a shallow clone of the exported +// fields of cfg, ignoring the unexported sync.Once, which +// contains a mutex and must not be copied. +// +// If cfg is nil, a new zero tls.Config is returned. +// +// TODO replace this function with official clone function. +func cloneTLSConfig(cfg *tls.Config) *tls.Config { + if cfg == nil { + return &tls.Config{} + } + return &tls.Config{ + Rand: cfg.Rand, + Time: cfg.Time, + Certificates: cfg.Certificates, + NameToCertificate: cfg.NameToCertificate, + GetCertificate: cfg.GetCertificate, + RootCAs: cfg.RootCAs, + NextProtos: cfg.NextProtos, + ServerName: cfg.ServerName, + ClientAuth: cfg.ClientAuth, + ClientCAs: cfg.ClientCAs, + InsecureSkipVerify: cfg.InsecureSkipVerify, + CipherSuites: cfg.CipherSuites, + PreferServerCipherSuites: cfg.PreferServerCipherSuites, + SessionTicketsDisabled: cfg.SessionTicketsDisabled, + SessionTicketKey: cfg.SessionTicketKey, + ClientSessionCache: cfg.ClientSessionCache, + MinVersion: cfg.MinVersion, + MaxVersion: cfg.MaxVersion, + CurvePreferences: cfg.CurvePreferences, + } +} diff --git a/vendor/google.golang.org/grpc/doc.go b/vendor/google.golang.org/grpc/doc.go new file mode 100644 index 0000000..a35f218 --- /dev/null +++ b/vendor/google.golang.org/grpc/doc.go @@ -0,0 +1,6 @@ +/* +Package grpc implements an RPC system called gRPC. + +See www.grpc.io for more information about gRPC. +*/ +package grpc // import "google.golang.org/grpc" diff --git a/vendor/google.golang.org/grpc/grpclog/logger.go b/vendor/google.golang.org/grpc/grpclog/logger.go new file mode 100644 index 0000000..3b29330 --- /dev/null +++ b/vendor/google.golang.org/grpc/grpclog/logger.go @@ -0,0 +1,93 @@ +/* + * + * Copyright 2015, Google Inc. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are + * met: + * + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following disclaimer + * in the documentation and/or other materials provided with the + * distribution. + * * Neither the name of Google Inc. nor the names of its + * contributors may be used to endorse or promote products derived from + * this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT + * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * + */ + +/* +Package grpclog defines logging for grpc. +*/ +package grpclog // import "google.golang.org/grpc/grpclog" + +import ( + "log" + "os" +) + +// Use golang's standard logger by default. +// Access is not mutex-protected: do not modify except in init() +// functions. +var logger Logger = log.New(os.Stderr, "", log.LstdFlags) + +// Logger mimics golang's standard Logger as an interface. +type Logger interface { + Fatal(args ...interface{}) + Fatalf(format string, args ...interface{}) + Fatalln(args ...interface{}) + Print(args ...interface{}) + Printf(format string, args ...interface{}) + Println(args ...interface{}) +} + +// SetLogger sets the logger that is used in grpc. Call only from +// init() functions. +func SetLogger(l Logger) { + logger = l +} + +// Fatal is equivalent to Print() followed by a call to os.Exit() with a non-zero exit code. +func Fatal(args ...interface{}) { + logger.Fatal(args...) +} + +// Fatalf is equivalent to Printf() followed by a call to os.Exit() with a non-zero exit code. +func Fatalf(format string, args ...interface{}) { + logger.Fatalf(format, args...) +} + +// Fatalln is equivalent to Println() followed by a call to os.Exit()) with a non-zero exit code. +func Fatalln(args ...interface{}) { + logger.Fatalln(args...) +} + +// Print prints to the logger. Arguments are handled in the manner of fmt.Print. +func Print(args ...interface{}) { + logger.Print(args...) +} + +// Printf prints to the logger. Arguments are handled in the manner of fmt.Printf. +func Printf(format string, args ...interface{}) { + logger.Printf(format, args...) +} + +// Println prints to the logger. Arguments are handled in the manner of fmt.Println. +func Println(args ...interface{}) { + logger.Println(args...) +} diff --git a/vendor/google.golang.org/grpc/interceptor.go b/vendor/google.golang.org/grpc/interceptor.go new file mode 100644 index 0000000..8d932ef --- /dev/null +++ b/vendor/google.golang.org/grpc/interceptor.go @@ -0,0 +1,90 @@ +/* + * + * Copyright 2016, Google Inc. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are + * met: + * + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following disclaimer + * in the documentation and/or other materials provided with the + * distribution. + * * Neither the name of Google Inc. nor the names of its + * contributors may be used to endorse or promote products derived from + * this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT + * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * + */ + +package grpc + +import ( + "golang.org/x/net/context" +) + +// UnaryInvoker is called by UnaryClientInterceptor to complete RPCs. +type UnaryInvoker func(ctx context.Context, method string, req, reply interface{}, cc *ClientConn, opts ...CallOption) error + +// UnaryClientInterceptor intercepts the execution of a unary RPC on the client. inovker is the handler to complete the RPC +// and it is the responsibility of the interceptor to call it. +// This is the EXPERIMENTAL API. +type UnaryClientInterceptor func(ctx context.Context, method string, req, reply interface{}, cc *ClientConn, invoker UnaryInvoker, opts ...CallOption) error + +// Streamer is called by StreamClientInterceptor to create a ClientStream. +type Streamer func(ctx context.Context, desc *StreamDesc, cc *ClientConn, method string, opts ...CallOption) (ClientStream, error) + +// StreamClientInterceptor intercepts the creation of ClientStream. It may return a custom ClientStream to intercept all I/O +// operations. streamer is the handlder to create a ClientStream and it is the responsibility of the interceptor to call it. +// This is the EXPERIMENTAL API. +type StreamClientInterceptor func(ctx context.Context, desc *StreamDesc, cc *ClientConn, method string, streamer Streamer, opts ...CallOption) (ClientStream, error) + +// UnaryServerInfo consists of various information about a unary RPC on +// server side. All per-rpc information may be mutated by the interceptor. +type UnaryServerInfo struct { + // Server is the service implementation the user provides. This is read-only. + Server interface{} + // FullMethod is the full RPC method string, i.e., /package.service/method. + FullMethod string +} + +// UnaryHandler defines the handler invoked by UnaryServerInterceptor to complete the normal +// execution of a unary RPC. +type UnaryHandler func(ctx context.Context, req interface{}) (interface{}, error) + +// UnaryServerInterceptor provides a hook to intercept the execution of a unary RPC on the server. info +// contains all the information of this RPC the interceptor can operate on. And handler is the wrapper +// of the service method implementation. It is the responsibility of the interceptor to invoke handler +// to complete the RPC. +type UnaryServerInterceptor func(ctx context.Context, req interface{}, info *UnaryServerInfo, handler UnaryHandler) (resp interface{}, err error) + +// StreamServerInfo consists of various information about a streaming RPC on +// server side. All per-rpc information may be mutated by the interceptor. +type StreamServerInfo struct { + // FullMethod is the full RPC method string, i.e., /package.service/method. + FullMethod string + // IsClientStream indicates whether the RPC is a client streaming RPC. + IsClientStream bool + // IsServerStream indicates whether the RPC is a server streaming RPC. + IsServerStream bool +} + +// StreamServerInterceptor provides a hook to intercept the execution of a streaming RPC on the server. +// info contains all the information of this RPC the interceptor can operate on. And handler is the +// service method implementation. It is the responsibility of the interceptor to invoke handler to +// complete the RPC. +type StreamServerInterceptor func(srv interface{}, ss ServerStream, info *StreamServerInfo, handler StreamHandler) error diff --git a/vendor/google.golang.org/grpc/internal/internal.go b/vendor/google.golang.org/grpc/internal/internal.go new file mode 100644 index 0000000..5489143 --- /dev/null +++ b/vendor/google.golang.org/grpc/internal/internal.go @@ -0,0 +1,49 @@ +/* + * Copyright 2016, Google Inc. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are + * met: + * + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following disclaimer + * in the documentation and/or other materials provided with the + * distribution. + * * Neither the name of Google Inc. nor the names of its + * contributors may be used to endorse or promote products derived from + * this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT + * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * + */ + +// Package internal contains gRPC-internal code for testing, to avoid polluting +// the godoc of the top-level grpc package. +package internal + +// TestingCloseConns closes all existing transports but keeps +// grpcServer.lis accepting new connections. +// +// The provided grpcServer must be of type *grpc.Server. It is untyped +// for circular dependency reasons. +var TestingCloseConns func(grpcServer interface{}) + +// TestingUseHandlerImpl enables the http.Handler-based server implementation. +// It must be called before Serve and requires TLS credentials. +// +// The provided grpcServer must be of type *grpc.Server. It is untyped +// for circular dependency reasons. +var TestingUseHandlerImpl func(grpcServer interface{}) diff --git a/vendor/google.golang.org/grpc/metadata/metadata.go b/vendor/google.golang.org/grpc/metadata/metadata.go new file mode 100644 index 0000000..65dc5af --- /dev/null +++ b/vendor/google.golang.org/grpc/metadata/metadata.go @@ -0,0 +1,149 @@ +/* + * + * Copyright 2014, Google Inc. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are + * met: + * + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following disclaimer + * in the documentation and/or other materials provided with the + * distribution. + * * Neither the name of Google Inc. nor the names of its + * contributors may be used to endorse or promote products derived from + * this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT + * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * + */ + +// Package metadata define the structure of the metadata supported by gRPC library. +package metadata // import "google.golang.org/grpc/metadata" + +import ( + "encoding/base64" + "fmt" + "strings" + + "golang.org/x/net/context" +) + +const ( + binHdrSuffix = "-bin" +) + +// encodeKeyValue encodes key and value qualified for transmission via gRPC. +// Transmitting binary headers violates HTTP/2 spec. +// TODO(zhaoq): Maybe check if k is ASCII also. +func encodeKeyValue(k, v string) (string, string) { + k = strings.ToLower(k) + if strings.HasSuffix(k, binHdrSuffix) { + val := base64.StdEncoding.EncodeToString([]byte(v)) + v = string(val) + } + return k, v +} + +// DecodeKeyValue returns the original key and value corresponding to the +// encoded data in k, v. +// If k is a binary header and v contains comma, v is split on comma before decoded, +// and the decoded v will be joined with comma before returned. +func DecodeKeyValue(k, v string) (string, string, error) { + if !strings.HasSuffix(k, binHdrSuffix) { + return k, v, nil + } + vvs := strings.Split(v, ",") + for i, vv := range vvs { + val, err := base64.StdEncoding.DecodeString(vv) + if err != nil { + return "", "", err + } + vvs[i] = string(val) + } + return k, strings.Join(vvs, ","), nil +} + +// MD is a mapping from metadata keys to values. Users should use the following +// two convenience functions New and Pairs to generate MD. +type MD map[string][]string + +// New creates a MD from given key-value map. +func New(m map[string]string) MD { + md := MD{} + for k, v := range m { + key, val := encodeKeyValue(k, v) + md[key] = append(md[key], val) + } + return md +} + +// Pairs returns an MD formed by the mapping of key, value ... +// Pairs panics if len(kv) is odd. +func Pairs(kv ...string) MD { + if len(kv)%2 == 1 { + panic(fmt.Sprintf("metadata: Pairs got the odd number of input pairs for metadata: %d", len(kv))) + } + md := MD{} + var k string + for i, s := range kv { + if i%2 == 0 { + k = s + continue + } + key, val := encodeKeyValue(k, s) + md[key] = append(md[key], val) + } + return md +} + +// Len returns the number of items in md. +func (md MD) Len() int { + return len(md) +} + +// Copy returns a copy of md. +func (md MD) Copy() MD { + return Join(md) +} + +// Join joins any number of MDs into a single MD. +// The order of values for each key is determined by the order in which +// the MDs containing those values are presented to Join. +func Join(mds ...MD) MD { + out := MD{} + for _, md := range mds { + for k, v := range md { + out[k] = append(out[k], v...) + } + } + return out +} + +type mdKey struct{} + +// NewContext creates a new context with md attached. +func NewContext(ctx context.Context, md MD) context.Context { + return context.WithValue(ctx, mdKey{}, md) +} + +// FromContext returns the MD in ctx if it exists. +// The returned md should be immutable, writing to it may cause races. +// Modification should be made to the copies of the returned md. +func FromContext(ctx context.Context) (md MD, ok bool) { + md, ok = ctx.Value(mdKey{}).(MD) + return +} diff --git a/vendor/google.golang.org/grpc/naming/naming.go b/vendor/google.golang.org/grpc/naming/naming.go new file mode 100644 index 0000000..c2e0871 --- /dev/null +++ b/vendor/google.golang.org/grpc/naming/naming.go @@ -0,0 +1,74 @@ +/* + * + * Copyright 2014, Google Inc. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are + * met: + * + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following disclaimer + * in the documentation and/or other materials provided with the + * distribution. + * * Neither the name of Google Inc. nor the names of its + * contributors may be used to endorse or promote products derived from + * this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT + * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * + */ + +// Package naming defines the naming API and related data structures for gRPC. +// The interface is EXPERIMENTAL and may be suject to change. +package naming + +// Operation defines the corresponding operations for a name resolution change. +type Operation uint8 + +const ( + // Add indicates a new address is added. + Add Operation = iota + // Delete indicates an exisiting address is deleted. + Delete +) + +// Update defines a name resolution update. Notice that it is not valid having both +// empty string Addr and nil Metadata in an Update. +type Update struct { + // Op indicates the operation of the update. + Op Operation + // Addr is the updated address. It is empty string if there is no address update. + Addr string + // Metadata is the updated metadata. It is nil if there is no metadata update. + // Metadata is not required for a custom naming implementation. + Metadata interface{} +} + +// Resolver creates a Watcher for a target to track its resolution changes. +type Resolver interface { + // Resolve creates a Watcher for target. + Resolve(target string) (Watcher, error) +} + +// Watcher watches for the updates on the specified target. +type Watcher interface { + // Next blocks until an update or error happens. It may return one or more + // updates. The first call should get the full set of the results. It should + // return an error if and only if Watcher cannot recover. + Next() ([]*Update, error) + // Close closes the Watcher. + Close() +} diff --git a/vendor/google.golang.org/grpc/peer/peer.go b/vendor/google.golang.org/grpc/peer/peer.go new file mode 100644 index 0000000..bfa6205 --- /dev/null +++ b/vendor/google.golang.org/grpc/peer/peer.go @@ -0,0 +1,65 @@ +/* + * + * Copyright 2014, Google Inc. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are + * met: + * + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following disclaimer + * in the documentation and/or other materials provided with the + * distribution. + * * Neither the name of Google Inc. nor the names of its + * contributors may be used to endorse or promote products derived from + * this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT + * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * + */ + +// Package peer defines various peer information associated with RPCs and +// corresponding utils. +package peer + +import ( + "net" + + "golang.org/x/net/context" + "google.golang.org/grpc/credentials" +) + +// Peer contains the information of the peer for an RPC. +type Peer struct { + // Addr is the peer address. + Addr net.Addr + // AuthInfo is the authentication information of the transport. + // It is nil if there is no transport security being used. + AuthInfo credentials.AuthInfo +} + +type peerKey struct{} + +// NewContext creates a new context with peer information attached. +func NewContext(ctx context.Context, p *Peer) context.Context { + return context.WithValue(ctx, peerKey{}, p) +} + +// FromContext returns the peer information in ctx if it exists. +func FromContext(ctx context.Context) (p *Peer, ok bool) { + p, ok = ctx.Value(peerKey{}).(*Peer) + return +} diff --git a/vendor/google.golang.org/grpc/rpc_util.go b/vendor/google.golang.org/grpc/rpc_util.go new file mode 100644 index 0000000..2619d39 --- /dev/null +++ b/vendor/google.golang.org/grpc/rpc_util.go @@ -0,0 +1,519 @@ +/* + * + * Copyright 2014, Google Inc. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are + * met: + * + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following disclaimer + * in the documentation and/or other materials provided with the + * distribution. + * * Neither the name of Google Inc. nor the names of its + * contributors may be used to endorse or promote products derived from + * this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT + * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * + */ + +package grpc + +import ( + "bytes" + "compress/gzip" + "encoding/binary" + "fmt" + "io" + "io/ioutil" + "math" + "os" + "time" + + "github.com/golang/protobuf/proto" + "golang.org/x/net/context" + "google.golang.org/grpc/codes" + "google.golang.org/grpc/metadata" + "google.golang.org/grpc/stats" + "google.golang.org/grpc/transport" +) + +// Codec defines the interface gRPC uses to encode and decode messages. +type Codec interface { + // Marshal returns the wire format of v. + Marshal(v interface{}) ([]byte, error) + // Unmarshal parses the wire format into v. + Unmarshal(data []byte, v interface{}) error + // String returns the name of the Codec implementation. The returned + // string will be used as part of content type in transmission. + String() string +} + +// protoCodec is a Codec implementation with protobuf. It is the default codec for gRPC. +type protoCodec struct{} + +func (protoCodec) Marshal(v interface{}) ([]byte, error) { + return proto.Marshal(v.(proto.Message)) +} + +func (protoCodec) Unmarshal(data []byte, v interface{}) error { + return proto.Unmarshal(data, v.(proto.Message)) +} + +func (protoCodec) String() string { + return "proto" +} + +// Compressor defines the interface gRPC uses to compress a message. +type Compressor interface { + // Do compresses p into w. + Do(w io.Writer, p []byte) error + // Type returns the compression algorithm the Compressor uses. + Type() string +} + +// NewGZIPCompressor creates a Compressor based on GZIP. +func NewGZIPCompressor() Compressor { + return &gzipCompressor{} +} + +type gzipCompressor struct { +} + +func (c *gzipCompressor) Do(w io.Writer, p []byte) error { + z := gzip.NewWriter(w) + if _, err := z.Write(p); err != nil { + return err + } + return z.Close() +} + +func (c *gzipCompressor) Type() string { + return "gzip" +} + +// Decompressor defines the interface gRPC uses to decompress a message. +type Decompressor interface { + // Do reads the data from r and uncompress them. + Do(r io.Reader) ([]byte, error) + // Type returns the compression algorithm the Decompressor uses. + Type() string +} + +type gzipDecompressor struct { +} + +// NewGZIPDecompressor creates a Decompressor based on GZIP. +func NewGZIPDecompressor() Decompressor { + return &gzipDecompressor{} +} + +func (d *gzipDecompressor) Do(r io.Reader) ([]byte, error) { + z, err := gzip.NewReader(r) + if err != nil { + return nil, err + } + defer z.Close() + return ioutil.ReadAll(z) +} + +func (d *gzipDecompressor) Type() string { + return "gzip" +} + +// callInfo contains all related configuration and information about an RPC. +type callInfo struct { + failFast bool + headerMD metadata.MD + trailerMD metadata.MD + traceInfo traceInfo // in trace.go +} + +var defaultCallInfo = callInfo{failFast: true} + +// CallOption configures a Call before it starts or extracts information from +// a Call after it completes. +type CallOption interface { + // before is called before the call is sent to any server. If before + // returns a non-nil error, the RPC fails with that error. + before(*callInfo) error + + // after is called after the call has completed. after cannot return an + // error, so any failures should be reported via output parameters. + after(*callInfo) +} + +type beforeCall func(c *callInfo) error + +func (o beforeCall) before(c *callInfo) error { return o(c) } +func (o beforeCall) after(c *callInfo) {} + +type afterCall func(c *callInfo) + +func (o afterCall) before(c *callInfo) error { return nil } +func (o afterCall) after(c *callInfo) { o(c) } + +// Header returns a CallOptions that retrieves the header metadata +// for a unary RPC. +func Header(md *metadata.MD) CallOption { + return afterCall(func(c *callInfo) { + *md = c.headerMD + }) +} + +// Trailer returns a CallOptions that retrieves the trailer metadata +// for a unary RPC. +func Trailer(md *metadata.MD) CallOption { + return afterCall(func(c *callInfo) { + *md = c.trailerMD + }) +} + +// FailFast configures the action to take when an RPC is attempted on broken +// connections or unreachable servers. If failfast is true, the RPC will fail +// immediately. Otherwise, the RPC client will block the call until a +// connection is available (or the call is canceled or times out) and will retry +// the call if it fails due to a transient error. Please refer to +// https://github.com/grpc/grpc/blob/master/doc/fail_fast.md +func FailFast(failFast bool) CallOption { + return beforeCall(func(c *callInfo) error { + c.failFast = failFast + return nil + }) +} + +// The format of the payload: compressed or not? +type payloadFormat uint8 + +const ( + compressionNone payloadFormat = iota // no compression + compressionMade +) + +// parser reads complete gRPC messages from the underlying reader. +type parser struct { + // r is the underlying reader. + // See the comment on recvMsg for the permissible + // error types. + r io.Reader + + // The header of a gRPC message. Find more detail + // at http://www.grpc.io/docs/guides/wire.html. + header [5]byte +} + +// recvMsg reads a complete gRPC message from the stream. +// +// It returns the message and its payload (compression/encoding) +// format. The caller owns the returned msg memory. +// +// If there is an error, possible values are: +// * io.EOF, when no messages remain +// * io.ErrUnexpectedEOF +// * of type transport.ConnectionError +// * of type transport.StreamError +// No other error values or types must be returned, which also means +// that the underlying io.Reader must not return an incompatible +// error. +func (p *parser) recvMsg(maxMsgSize int) (pf payloadFormat, msg []byte, err error) { + if _, err := io.ReadFull(p.r, p.header[:]); err != nil { + return 0, nil, err + } + + pf = payloadFormat(p.header[0]) + length := binary.BigEndian.Uint32(p.header[1:]) + + if length == 0 { + return pf, nil, nil + } + if length > uint32(maxMsgSize) { + return 0, nil, Errorf(codes.Internal, "grpc: received message length %d exceeding the max size %d", length, maxMsgSize) + } + // TODO(bradfitz,zhaoq): garbage. reuse buffer after proto decoding instead + // of making it for each message: + msg = make([]byte, int(length)) + if _, err := io.ReadFull(p.r, msg); err != nil { + if err == io.EOF { + err = io.ErrUnexpectedEOF + } + return 0, nil, err + } + return pf, msg, nil +} + +// encode serializes msg and prepends the message header. If msg is nil, it +// generates the message header of 0 message length. +func encode(c Codec, msg interface{}, cp Compressor, cbuf *bytes.Buffer, outPayload *stats.OutPayload) ([]byte, error) { + var ( + b []byte + length uint + ) + if msg != nil { + var err error + // TODO(zhaoq): optimize to reduce memory alloc and copying. + b, err = c.Marshal(msg) + if err != nil { + return nil, err + } + if outPayload != nil { + outPayload.Payload = msg + // TODO truncate large payload. + outPayload.Data = b + outPayload.Length = len(b) + } + if cp != nil { + if err := cp.Do(cbuf, b); err != nil { + return nil, err + } + b = cbuf.Bytes() + } + length = uint(len(b)) + } + if length > math.MaxUint32 { + return nil, Errorf(codes.InvalidArgument, "grpc: message too large (%d bytes)", length) + } + + const ( + payloadLen = 1 + sizeLen = 4 + ) + + var buf = make([]byte, payloadLen+sizeLen+len(b)) + + // Write payload format + if cp == nil { + buf[0] = byte(compressionNone) + } else { + buf[0] = byte(compressionMade) + } + // Write length of b into buf + binary.BigEndian.PutUint32(buf[1:], uint32(length)) + // Copy encoded msg to buf + copy(buf[5:], b) + + if outPayload != nil { + outPayload.WireLength = len(buf) + } + + return buf, nil +} + +func checkRecvPayload(pf payloadFormat, recvCompress string, dc Decompressor) error { + switch pf { + case compressionNone: + case compressionMade: + if dc == nil || recvCompress != dc.Type() { + return Errorf(codes.Unimplemented, "grpc: Decompressor is not installed for grpc-encoding %q", recvCompress) + } + default: + return Errorf(codes.Internal, "grpc: received unexpected payload format %d", pf) + } + return nil +} + +func recv(p *parser, c Codec, s *transport.Stream, dc Decompressor, m interface{}, maxMsgSize int, inPayload *stats.InPayload) error { + pf, d, err := p.recvMsg(maxMsgSize) + if err != nil { + return err + } + if inPayload != nil { + inPayload.WireLength = len(d) + } + if err := checkRecvPayload(pf, s.RecvCompress(), dc); err != nil { + return err + } + if pf == compressionMade { + d, err = dc.Do(bytes.NewReader(d)) + if err != nil { + return Errorf(codes.Internal, "grpc: failed to decompress the received message %v", err) + } + } + if len(d) > maxMsgSize { + // TODO: Revisit the error code. Currently keep it consistent with java + // implementation. + return Errorf(codes.Internal, "grpc: received a message of %d bytes exceeding %d limit", len(d), maxMsgSize) + } + if err := c.Unmarshal(d, m); err != nil { + return Errorf(codes.Internal, "grpc: failed to unmarshal the received message %v", err) + } + if inPayload != nil { + inPayload.RecvTime = time.Now() + inPayload.Payload = m + // TODO truncate large payload. + inPayload.Data = d + inPayload.Length = len(d) + } + return nil +} + +// rpcError defines the status from an RPC. +type rpcError struct { + code codes.Code + desc string +} + +func (e *rpcError) Error() string { + return fmt.Sprintf("rpc error: code = %d desc = %s", e.code, e.desc) +} + +// Code returns the error code for err if it was produced by the rpc system. +// Otherwise, it returns codes.Unknown. +func Code(err error) codes.Code { + if err == nil { + return codes.OK + } + if e, ok := err.(*rpcError); ok { + return e.code + } + return codes.Unknown +} + +// ErrorDesc returns the error description of err if it was produced by the rpc system. +// Otherwise, it returns err.Error() or empty string when err is nil. +func ErrorDesc(err error) string { + if err == nil { + return "" + } + if e, ok := err.(*rpcError); ok { + return e.desc + } + return err.Error() +} + +// Errorf returns an error containing an error code and a description; +// Errorf returns nil if c is OK. +func Errorf(c codes.Code, format string, a ...interface{}) error { + if c == codes.OK { + return nil + } + return &rpcError{ + code: c, + desc: fmt.Sprintf(format, a...), + } +} + +// toRPCErr converts an error into a rpcError. +func toRPCErr(err error) error { + switch e := err.(type) { + case *rpcError: + return err + case transport.StreamError: + return &rpcError{ + code: e.Code, + desc: e.Desc, + } + case transport.ConnectionError: + return &rpcError{ + code: codes.Internal, + desc: e.Desc, + } + default: + switch err { + case context.DeadlineExceeded: + return &rpcError{ + code: codes.DeadlineExceeded, + desc: err.Error(), + } + case context.Canceled: + return &rpcError{ + code: codes.Canceled, + desc: err.Error(), + } + case ErrClientConnClosing: + return &rpcError{ + code: codes.FailedPrecondition, + desc: err.Error(), + } + } + + } + return Errorf(codes.Unknown, "%v", err) +} + +// convertCode converts a standard Go error into its canonical code. Note that +// this is only used to translate the error returned by the server applications. +func convertCode(err error) codes.Code { + switch err { + case nil: + return codes.OK + case io.EOF: + return codes.OutOfRange + case io.ErrClosedPipe, io.ErrNoProgress, io.ErrShortBuffer, io.ErrShortWrite, io.ErrUnexpectedEOF: + return codes.FailedPrecondition + case os.ErrInvalid: + return codes.InvalidArgument + case context.Canceled: + return codes.Canceled + case context.DeadlineExceeded: + return codes.DeadlineExceeded + } + switch { + case os.IsExist(err): + return codes.AlreadyExists + case os.IsNotExist(err): + return codes.NotFound + case os.IsPermission(err): + return codes.PermissionDenied + } + return codes.Unknown +} + +// MethodConfig defines the configuration recommended by the service providers for a +// particular method. +// This is EXPERIMENTAL and subject to change. +type MethodConfig struct { + // WaitForReady indicates whether RPCs sent to this method should wait until + // the connection is ready by default (!failfast). The value specified via the + // gRPC client API will override the value set here. + WaitForReady bool + // Timeout is the default timeout for RPCs sent to this method. The actual + // deadline used will be the minimum of the value specified here and the value + // set by the application via the gRPC client API. If either one is not set, + // then the other will be used. If neither is set, then the RPC has no deadline. + Timeout time.Duration + // MaxReqSize is the maximum allowed payload size for an individual request in a + // stream (client->server) in bytes. The size which is measured is the serialized, + // uncompressed payload in bytes. The actual value used is the minumum of the value + // specified here and the value set by the application via the gRPC client API. If + // either one is not set, then the other will be used. If neither is set, then the + // built-in default is used. + // TODO: support this. + MaxReqSize uint64 + // MaxRespSize is the maximum allowed payload size for an individual response in a + // stream (server->client) in bytes. + // TODO: support this. + MaxRespSize uint64 +} + +// ServiceConfig is provided by the service provider and contains parameters for how +// clients that connect to the service should behave. +// This is EXPERIMENTAL and subject to change. +type ServiceConfig struct { + // LB is the load balancer the service providers recommends. The balancer specified + // via grpc.WithBalancer will override this. + LB Balancer + // Methods contains a map for the methods in this service. + Methods map[string]MethodConfig +} + +// SupportPackageIsVersion4 is referenced from generated protocol buffer files +// to assert that that code is compatible with this version of the grpc package. +// +// This constant may be renamed in the future if a change in the generated code +// requires a synchronised update of grpc-go and protoc-gen-go. This constant +// should not be referenced from any other code. +const SupportPackageIsVersion4 = true diff --git a/vendor/google.golang.org/grpc/server.go b/vendor/google.golang.org/grpc/server.go new file mode 100644 index 0000000..985226d --- /dev/null +++ b/vendor/google.golang.org/grpc/server.go @@ -0,0 +1,1054 @@ +/* + * + * Copyright 2014, Google Inc. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are + * met: + * + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following disclaimer + * in the documentation and/or other materials provided with the + * distribution. + * * Neither the name of Google Inc. nor the names of its + * contributors may be used to endorse or promote products derived from + * this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT + * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * + */ + +package grpc + +import ( + "bytes" + "errors" + "fmt" + "io" + "net" + "net/http" + "reflect" + "runtime" + "strings" + "sync" + "time" + + "golang.org/x/net/context" + "golang.org/x/net/http2" + "golang.org/x/net/trace" + "google.golang.org/grpc/codes" + "google.golang.org/grpc/credentials" + "google.golang.org/grpc/grpclog" + "google.golang.org/grpc/internal" + "google.golang.org/grpc/metadata" + "google.golang.org/grpc/stats" + "google.golang.org/grpc/tap" + "google.golang.org/grpc/transport" +) + +type methodHandler func(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor UnaryServerInterceptor) (interface{}, error) + +// MethodDesc represents an RPC service's method specification. +type MethodDesc struct { + MethodName string + Handler methodHandler +} + +// ServiceDesc represents an RPC service's specification. +type ServiceDesc struct { + ServiceName string + // The pointer to the service interface. Used to check whether the user + // provided implementation satisfies the interface requirements. + HandlerType interface{} + Methods []MethodDesc + Streams []StreamDesc + Metadata interface{} +} + +// service consists of the information of the server serving this service and +// the methods in this service. +type service struct { + server interface{} // the server for service methods + md map[string]*MethodDesc + sd map[string]*StreamDesc + mdata interface{} +} + +// Server is a gRPC server to serve RPC requests. +type Server struct { + opts options + + mu sync.Mutex // guards following + lis map[net.Listener]bool + conns map[io.Closer]bool + drain bool + ctx context.Context + cancel context.CancelFunc + // A CondVar to let GracefulStop() blocks until all the pending RPCs are finished + // and all the transport goes away. + cv *sync.Cond + m map[string]*service // service name -> service info + events trace.EventLog +} + +type options struct { + creds credentials.TransportCredentials + codec Codec + cp Compressor + dc Decompressor + maxMsgSize int + unaryInt UnaryServerInterceptor + streamInt StreamServerInterceptor + inTapHandle tap.ServerInHandle + statsHandler stats.Handler + maxConcurrentStreams uint32 + useHandlerImpl bool // use http.Handler-based server +} + +var defaultMaxMsgSize = 1024 * 1024 * 4 // use 4MB as the default message size limit + +// A ServerOption sets options. +type ServerOption func(*options) + +// CustomCodec returns a ServerOption that sets a codec for message marshaling and unmarshaling. +func CustomCodec(codec Codec) ServerOption { + return func(o *options) { + o.codec = codec + } +} + +// RPCCompressor returns a ServerOption that sets a compressor for outbound messages. +func RPCCompressor(cp Compressor) ServerOption { + return func(o *options) { + o.cp = cp + } +} + +// RPCDecompressor returns a ServerOption that sets a decompressor for inbound messages. +func RPCDecompressor(dc Decompressor) ServerOption { + return func(o *options) { + o.dc = dc + } +} + +// MaxMsgSize returns a ServerOption to set the max message size in bytes for inbound mesages. +// If this is not set, gRPC uses the default 4MB. +func MaxMsgSize(m int) ServerOption { + return func(o *options) { + o.maxMsgSize = m + } +} + +// MaxConcurrentStreams returns a ServerOption that will apply a limit on the number +// of concurrent streams to each ServerTransport. +func MaxConcurrentStreams(n uint32) ServerOption { + return func(o *options) { + o.maxConcurrentStreams = n + } +} + +// Creds returns a ServerOption that sets credentials for server connections. +func Creds(c credentials.TransportCredentials) ServerOption { + return func(o *options) { + o.creds = c + } +} + +// UnaryInterceptor returns a ServerOption that sets the UnaryServerInterceptor for the +// server. Only one unary interceptor can be installed. The construction of multiple +// interceptors (e.g., chaining) can be implemented at the caller. +func UnaryInterceptor(i UnaryServerInterceptor) ServerOption { + return func(o *options) { + if o.unaryInt != nil { + panic("The unary server interceptor has been set.") + } + o.unaryInt = i + } +} + +// StreamInterceptor returns a ServerOption that sets the StreamServerInterceptor for the +// server. Only one stream interceptor can be installed. +func StreamInterceptor(i StreamServerInterceptor) ServerOption { + return func(o *options) { + if o.streamInt != nil { + panic("The stream server interceptor has been set.") + } + o.streamInt = i + } +} + +// InTapHandle returns a ServerOption that sets the tap handle for all the server +// transport to be created. Only one can be installed. +func InTapHandle(h tap.ServerInHandle) ServerOption { + return func(o *options) { + if o.inTapHandle != nil { + panic("The tap handle has been set.") + } + o.inTapHandle = h + } +} + +// StatsHandler returns a ServerOption that sets the stats handler for the server. +func StatsHandler(h stats.Handler) ServerOption { + return func(o *options) { + o.statsHandler = h + } +} + +// NewServer creates a gRPC server which has no service registered and has not +// started to accept requests yet. +func NewServer(opt ...ServerOption) *Server { + var opts options + opts.maxMsgSize = defaultMaxMsgSize + for _, o := range opt { + o(&opts) + } + if opts.codec == nil { + // Set the default codec. + opts.codec = protoCodec{} + } + s := &Server{ + lis: make(map[net.Listener]bool), + opts: opts, + conns: make(map[io.Closer]bool), + m: make(map[string]*service), + } + s.cv = sync.NewCond(&s.mu) + s.ctx, s.cancel = context.WithCancel(context.Background()) + if EnableTracing { + _, file, line, _ := runtime.Caller(1) + s.events = trace.NewEventLog("grpc.Server", fmt.Sprintf("%s:%d", file, line)) + } + return s +} + +// printf records an event in s's event log, unless s has been stopped. +// REQUIRES s.mu is held. +func (s *Server) printf(format string, a ...interface{}) { + if s.events != nil { + s.events.Printf(format, a...) + } +} + +// errorf records an error in s's event log, unless s has been stopped. +// REQUIRES s.mu is held. +func (s *Server) errorf(format string, a ...interface{}) { + if s.events != nil { + s.events.Errorf(format, a...) + } +} + +// RegisterService register a service and its implementation to the gRPC +// server. Called from the IDL generated code. This must be called before +// invoking Serve. +func (s *Server) RegisterService(sd *ServiceDesc, ss interface{}) { + ht := reflect.TypeOf(sd.HandlerType).Elem() + st := reflect.TypeOf(ss) + if !st.Implements(ht) { + grpclog.Fatalf("grpc: Server.RegisterService found the handler of type %v that does not satisfy %v", st, ht) + } + s.register(sd, ss) +} + +func (s *Server) register(sd *ServiceDesc, ss interface{}) { + s.mu.Lock() + defer s.mu.Unlock() + s.printf("RegisterService(%q)", sd.ServiceName) + if _, ok := s.m[sd.ServiceName]; ok { + grpclog.Fatalf("grpc: Server.RegisterService found duplicate service registration for %q", sd.ServiceName) + } + srv := &service{ + server: ss, + md: make(map[string]*MethodDesc), + sd: make(map[string]*StreamDesc), + mdata: sd.Metadata, + } + for i := range sd.Methods { + d := &sd.Methods[i] + srv.md[d.MethodName] = d + } + for i := range sd.Streams { + d := &sd.Streams[i] + srv.sd[d.StreamName] = d + } + s.m[sd.ServiceName] = srv +} + +// MethodInfo contains the information of an RPC including its method name and type. +type MethodInfo struct { + // Name is the method name only, without the service name or package name. + Name string + // IsClientStream indicates whether the RPC is a client streaming RPC. + IsClientStream bool + // IsServerStream indicates whether the RPC is a server streaming RPC. + IsServerStream bool +} + +// ServiceInfo contains unary RPC method info, streaming RPC methid info and metadata for a service. +type ServiceInfo struct { + Methods []MethodInfo + // Metadata is the metadata specified in ServiceDesc when registering service. + Metadata interface{} +} + +// GetServiceInfo returns a map from service names to ServiceInfo. +// Service names include the package names, in the form of .. +func (s *Server) GetServiceInfo() map[string]ServiceInfo { + ret := make(map[string]ServiceInfo) + for n, srv := range s.m { + methods := make([]MethodInfo, 0, len(srv.md)+len(srv.sd)) + for m := range srv.md { + methods = append(methods, MethodInfo{ + Name: m, + IsClientStream: false, + IsServerStream: false, + }) + } + for m, d := range srv.sd { + methods = append(methods, MethodInfo{ + Name: m, + IsClientStream: d.ClientStreams, + IsServerStream: d.ServerStreams, + }) + } + + ret[n] = ServiceInfo{ + Methods: methods, + Metadata: srv.mdata, + } + } + return ret +} + +var ( + // ErrServerStopped indicates that the operation is now illegal because of + // the server being stopped. + ErrServerStopped = errors.New("grpc: the server has been stopped") +) + +func (s *Server) useTransportAuthenticator(rawConn net.Conn) (net.Conn, credentials.AuthInfo, error) { + if s.opts.creds == nil { + return rawConn, nil, nil + } + return s.opts.creds.ServerHandshake(rawConn) +} + +// Serve accepts incoming connections on the listener lis, creating a new +// ServerTransport and service goroutine for each. The service goroutines +// read gRPC requests and then call the registered handlers to reply to them. +// Serve returns when lis.Accept fails with fatal errors. lis will be closed when +// this method returns. +// Serve always returns non-nil error. +func (s *Server) Serve(lis net.Listener) error { + s.mu.Lock() + s.printf("serving") + if s.lis == nil { + s.mu.Unlock() + lis.Close() + return ErrServerStopped + } + s.lis[lis] = true + s.mu.Unlock() + defer func() { + s.mu.Lock() + if s.lis != nil && s.lis[lis] { + lis.Close() + delete(s.lis, lis) + } + s.mu.Unlock() + }() + + var tempDelay time.Duration // how long to sleep on accept failure + + for { + rawConn, err := lis.Accept() + if err != nil { + if ne, ok := err.(interface { + Temporary() bool + }); ok && ne.Temporary() { + if tempDelay == 0 { + tempDelay = 5 * time.Millisecond + } else { + tempDelay *= 2 + } + if max := 1 * time.Second; tempDelay > max { + tempDelay = max + } + s.mu.Lock() + s.printf("Accept error: %v; retrying in %v", err, tempDelay) + s.mu.Unlock() + select { + case <-time.After(tempDelay): + case <-s.ctx.Done(): + } + continue + } + s.mu.Lock() + s.printf("done serving; Accept = %v", err) + s.mu.Unlock() + return err + } + tempDelay = 0 + // Start a new goroutine to deal with rawConn + // so we don't stall this Accept loop goroutine. + go s.handleRawConn(rawConn) + } +} + +// handleRawConn is run in its own goroutine and handles a just-accepted +// connection that has not had any I/O performed on it yet. +func (s *Server) handleRawConn(rawConn net.Conn) { + conn, authInfo, err := s.useTransportAuthenticator(rawConn) + if err != nil { + s.mu.Lock() + s.errorf("ServerHandshake(%q) failed: %v", rawConn.RemoteAddr(), err) + s.mu.Unlock() + grpclog.Printf("grpc: Server.Serve failed to complete security handshake from %q: %v", rawConn.RemoteAddr(), err) + // If serverHandShake returns ErrConnDispatched, keep rawConn open. + if err != credentials.ErrConnDispatched { + rawConn.Close() + } + return + } + + s.mu.Lock() + if s.conns == nil { + s.mu.Unlock() + conn.Close() + return + } + s.mu.Unlock() + + if s.opts.useHandlerImpl { + s.serveUsingHandler(conn) + } else { + s.serveHTTP2Transport(conn, authInfo) + } +} + +// serveHTTP2Transport sets up a http/2 transport (using the +// gRPC http2 server transport in transport/http2_server.go) and +// serves streams on it. +// This is run in its own goroutine (it does network I/O in +// transport.NewServerTransport). +func (s *Server) serveHTTP2Transport(c net.Conn, authInfo credentials.AuthInfo) { + config := &transport.ServerConfig{ + MaxStreams: s.opts.maxConcurrentStreams, + AuthInfo: authInfo, + InTapHandle: s.opts.inTapHandle, + StatsHandler: s.opts.statsHandler, + } + st, err := transport.NewServerTransport("http2", c, config) + if err != nil { + s.mu.Lock() + s.errorf("NewServerTransport(%q) failed: %v", c.RemoteAddr(), err) + s.mu.Unlock() + c.Close() + grpclog.Println("grpc: Server.Serve failed to create ServerTransport: ", err) + return + } + if !s.addConn(st) { + st.Close() + return + } + s.serveStreams(st) +} + +func (s *Server) serveStreams(st transport.ServerTransport) { + defer s.removeConn(st) + defer st.Close() + var wg sync.WaitGroup + st.HandleStreams(func(stream *transport.Stream) { + wg.Add(1) + go func() { + defer wg.Done() + s.handleStream(st, stream, s.traceInfo(st, stream)) + }() + }, func(ctx context.Context, method string) context.Context { + if !EnableTracing { + return ctx + } + tr := trace.New("grpc.Recv."+methodFamily(method), method) + return trace.NewContext(ctx, tr) + }) + wg.Wait() +} + +var _ http.Handler = (*Server)(nil) + +// serveUsingHandler is called from handleRawConn when s is configured +// to handle requests via the http.Handler interface. It sets up a +// net/http.Server to handle the just-accepted conn. The http.Server +// is configured to route all incoming requests (all HTTP/2 streams) +// to ServeHTTP, which creates a new ServerTransport for each stream. +// serveUsingHandler blocks until conn closes. +// +// This codepath is only used when Server.TestingUseHandlerImpl has +// been configured. This lets the end2end tests exercise the ServeHTTP +// method as one of the environment types. +// +// conn is the *tls.Conn that's already been authenticated. +func (s *Server) serveUsingHandler(conn net.Conn) { + if !s.addConn(conn) { + conn.Close() + return + } + defer s.removeConn(conn) + h2s := &http2.Server{ + MaxConcurrentStreams: s.opts.maxConcurrentStreams, + } + h2s.ServeConn(conn, &http2.ServeConnOpts{ + Handler: s, + }) +} + +func (s *Server) ServeHTTP(w http.ResponseWriter, r *http.Request) { + st, err := transport.NewServerHandlerTransport(w, r) + if err != nil { + http.Error(w, err.Error(), http.StatusInternalServerError) + return + } + if !s.addConn(st) { + st.Close() + return + } + defer s.removeConn(st) + s.serveStreams(st) +} + +// traceInfo returns a traceInfo and associates it with stream, if tracing is enabled. +// If tracing is not enabled, it returns nil. +func (s *Server) traceInfo(st transport.ServerTransport, stream *transport.Stream) (trInfo *traceInfo) { + tr, ok := trace.FromContext(stream.Context()) + if !ok { + return nil + } + + trInfo = &traceInfo{ + tr: tr, + } + trInfo.firstLine.client = false + trInfo.firstLine.remoteAddr = st.RemoteAddr() + + if dl, ok := stream.Context().Deadline(); ok { + trInfo.firstLine.deadline = dl.Sub(time.Now()) + } + return trInfo +} + +func (s *Server) addConn(c io.Closer) bool { + s.mu.Lock() + defer s.mu.Unlock() + if s.conns == nil || s.drain { + return false + } + s.conns[c] = true + return true +} + +func (s *Server) removeConn(c io.Closer) { + s.mu.Lock() + defer s.mu.Unlock() + if s.conns != nil { + delete(s.conns, c) + s.cv.Broadcast() + } +} + +func (s *Server) sendResponse(t transport.ServerTransport, stream *transport.Stream, msg interface{}, cp Compressor, opts *transport.Options) error { + var ( + cbuf *bytes.Buffer + outPayload *stats.OutPayload + ) + if cp != nil { + cbuf = new(bytes.Buffer) + } + if s.opts.statsHandler != nil { + outPayload = &stats.OutPayload{} + } + p, err := encode(s.opts.codec, msg, cp, cbuf, outPayload) + if err != nil { + // This typically indicates a fatal issue (e.g., memory + // corruption or hardware faults) the application program + // cannot handle. + // + // TODO(zhaoq): There exist other options also such as only closing the + // faulty stream locally and remotely (Other streams can keep going). Find + // the optimal option. + grpclog.Fatalf("grpc: Server failed to encode response %v", err) + } + err = t.Write(stream, p, opts) + if err == nil && outPayload != nil { + outPayload.SentTime = time.Now() + s.opts.statsHandler.HandleRPC(stream.Context(), outPayload) + } + return err +} + +func (s *Server) processUnaryRPC(t transport.ServerTransport, stream *transport.Stream, srv *service, md *MethodDesc, trInfo *traceInfo) (err error) { + sh := s.opts.statsHandler + if sh != nil { + begin := &stats.Begin{ + BeginTime: time.Now(), + } + sh.HandleRPC(stream.Context(), begin) + } + defer func() { + if sh != nil { + end := &stats.End{ + EndTime: time.Now(), + } + if err != nil && err != io.EOF { + end.Error = toRPCErr(err) + } + sh.HandleRPC(stream.Context(), end) + } + }() + if trInfo != nil { + defer trInfo.tr.Finish() + trInfo.firstLine.client = false + trInfo.tr.LazyLog(&trInfo.firstLine, false) + defer func() { + if err != nil && err != io.EOF { + trInfo.tr.LazyLog(&fmtStringer{"%v", []interface{}{err}}, true) + trInfo.tr.SetError() + } + }() + } + if s.opts.cp != nil { + // NOTE: this needs to be ahead of all handling, https://github.com/grpc/grpc-go/issues/686. + stream.SetSendCompress(s.opts.cp.Type()) + } + p := &parser{r: stream} + for { + pf, req, err := p.recvMsg(s.opts.maxMsgSize) + if err == io.EOF { + // The entire stream is done (for unary RPC only). + return err + } + if err == io.ErrUnexpectedEOF { + err = Errorf(codes.Internal, io.ErrUnexpectedEOF.Error()) + } + if err != nil { + switch err := err.(type) { + case *rpcError: + if e := t.WriteStatus(stream, err.code, err.desc); e != nil { + grpclog.Printf("grpc: Server.processUnaryRPC failed to write status %v", e) + } + case transport.ConnectionError: + // Nothing to do here. + case transport.StreamError: + if e := t.WriteStatus(stream, err.Code, err.Desc); e != nil { + grpclog.Printf("grpc: Server.processUnaryRPC failed to write status %v", e) + } + default: + panic(fmt.Sprintf("grpc: Unexpected error (%T) from recvMsg: %v", err, err)) + } + return err + } + + if err := checkRecvPayload(pf, stream.RecvCompress(), s.opts.dc); err != nil { + switch err := err.(type) { + case *rpcError: + if e := t.WriteStatus(stream, err.code, err.desc); e != nil { + grpclog.Printf("grpc: Server.processUnaryRPC failed to write status %v", e) + } + return err + default: + if e := t.WriteStatus(stream, codes.Internal, err.Error()); e != nil { + grpclog.Printf("grpc: Server.processUnaryRPC failed to write status %v", e) + } + // TODO checkRecvPayload always return RPC error. Add a return here if necessary. + } + } + var inPayload *stats.InPayload + if sh != nil { + inPayload = &stats.InPayload{ + RecvTime: time.Now(), + } + } + statusCode := codes.OK + statusDesc := "" + df := func(v interface{}) error { + if inPayload != nil { + inPayload.WireLength = len(req) + } + if pf == compressionMade { + var err error + req, err = s.opts.dc.Do(bytes.NewReader(req)) + if err != nil { + if err := t.WriteStatus(stream, codes.Internal, err.Error()); err != nil { + grpclog.Printf("grpc: Server.processUnaryRPC failed to write status %v", err) + } + return Errorf(codes.Internal, err.Error()) + } + } + if len(req) > s.opts.maxMsgSize { + // TODO: Revisit the error code. Currently keep it consistent with + // java implementation. + statusCode = codes.Internal + statusDesc = fmt.Sprintf("grpc: server received a message of %d bytes exceeding %d limit", len(req), s.opts.maxMsgSize) + } + if err := s.opts.codec.Unmarshal(req, v); err != nil { + return err + } + if inPayload != nil { + inPayload.Payload = v + inPayload.Data = req + inPayload.Length = len(req) + sh.HandleRPC(stream.Context(), inPayload) + } + if trInfo != nil { + trInfo.tr.LazyLog(&payload{sent: false, msg: v}, true) + } + return nil + } + reply, appErr := md.Handler(srv.server, stream.Context(), df, s.opts.unaryInt) + if appErr != nil { + if err, ok := appErr.(*rpcError); ok { + statusCode = err.code + statusDesc = err.desc + } else { + statusCode = convertCode(appErr) + statusDesc = appErr.Error() + } + if trInfo != nil && statusCode != codes.OK { + trInfo.tr.LazyLog(stringer(statusDesc), true) + trInfo.tr.SetError() + } + if err := t.WriteStatus(stream, statusCode, statusDesc); err != nil { + grpclog.Printf("grpc: Server.processUnaryRPC failed to write status: %v", err) + } + return Errorf(statusCode, statusDesc) + } + if trInfo != nil { + trInfo.tr.LazyLog(stringer("OK"), false) + } + opts := &transport.Options{ + Last: true, + Delay: false, + } + if err := s.sendResponse(t, stream, reply, s.opts.cp, opts); err != nil { + switch err := err.(type) { + case transport.ConnectionError: + // Nothing to do here. + case transport.StreamError: + statusCode = err.Code + statusDesc = err.Desc + default: + statusCode = codes.Unknown + statusDesc = err.Error() + } + return err + } + if trInfo != nil { + trInfo.tr.LazyLog(&payload{sent: true, msg: reply}, true) + } + errWrite := t.WriteStatus(stream, statusCode, statusDesc) + if statusCode != codes.OK { + return Errorf(statusCode, statusDesc) + } + return errWrite + } +} + +func (s *Server) processStreamingRPC(t transport.ServerTransport, stream *transport.Stream, srv *service, sd *StreamDesc, trInfo *traceInfo) (err error) { + sh := s.opts.statsHandler + if sh != nil { + begin := &stats.Begin{ + BeginTime: time.Now(), + } + sh.HandleRPC(stream.Context(), begin) + } + defer func() { + if sh != nil { + end := &stats.End{ + EndTime: time.Now(), + } + if err != nil && err != io.EOF { + end.Error = toRPCErr(err) + } + sh.HandleRPC(stream.Context(), end) + } + }() + if s.opts.cp != nil { + stream.SetSendCompress(s.opts.cp.Type()) + } + ss := &serverStream{ + t: t, + s: stream, + p: &parser{r: stream}, + codec: s.opts.codec, + cp: s.opts.cp, + dc: s.opts.dc, + maxMsgSize: s.opts.maxMsgSize, + trInfo: trInfo, + statsHandler: sh, + } + if ss.cp != nil { + ss.cbuf = new(bytes.Buffer) + } + if trInfo != nil { + trInfo.tr.LazyLog(&trInfo.firstLine, false) + defer func() { + ss.mu.Lock() + if err != nil && err != io.EOF { + ss.trInfo.tr.LazyLog(&fmtStringer{"%v", []interface{}{err}}, true) + ss.trInfo.tr.SetError() + } + ss.trInfo.tr.Finish() + ss.trInfo.tr = nil + ss.mu.Unlock() + }() + } + var appErr error + if s.opts.streamInt == nil { + appErr = sd.Handler(srv.server, ss) + } else { + info := &StreamServerInfo{ + FullMethod: stream.Method(), + IsClientStream: sd.ClientStreams, + IsServerStream: sd.ServerStreams, + } + appErr = s.opts.streamInt(srv.server, ss, info, sd.Handler) + } + if appErr != nil { + if err, ok := appErr.(*rpcError); ok { + ss.statusCode = err.code + ss.statusDesc = err.desc + } else if err, ok := appErr.(transport.StreamError); ok { + ss.statusCode = err.Code + ss.statusDesc = err.Desc + } else { + ss.statusCode = convertCode(appErr) + ss.statusDesc = appErr.Error() + } + } + if trInfo != nil { + ss.mu.Lock() + if ss.statusCode != codes.OK { + ss.trInfo.tr.LazyLog(stringer(ss.statusDesc), true) + ss.trInfo.tr.SetError() + } else { + ss.trInfo.tr.LazyLog(stringer("OK"), false) + } + ss.mu.Unlock() + } + errWrite := t.WriteStatus(ss.s, ss.statusCode, ss.statusDesc) + if ss.statusCode != codes.OK { + return Errorf(ss.statusCode, ss.statusDesc) + } + return errWrite + +} + +func (s *Server) handleStream(t transport.ServerTransport, stream *transport.Stream, trInfo *traceInfo) { + sm := stream.Method() + if sm != "" && sm[0] == '/' { + sm = sm[1:] + } + pos := strings.LastIndex(sm, "/") + if pos == -1 { + if trInfo != nil { + trInfo.tr.LazyLog(&fmtStringer{"Malformed method name %q", []interface{}{sm}}, true) + trInfo.tr.SetError() + } + errDesc := fmt.Sprintf("malformed method name: %q", stream.Method()) + if err := t.WriteStatus(stream, codes.InvalidArgument, errDesc); err != nil { + if trInfo != nil { + trInfo.tr.LazyLog(&fmtStringer{"%v", []interface{}{err}}, true) + trInfo.tr.SetError() + } + grpclog.Printf("grpc: Server.handleStream failed to write status: %v", err) + } + if trInfo != nil { + trInfo.tr.Finish() + } + return + } + service := sm[:pos] + method := sm[pos+1:] + srv, ok := s.m[service] + if !ok { + if trInfo != nil { + trInfo.tr.LazyLog(&fmtStringer{"Unknown service %v", []interface{}{service}}, true) + trInfo.tr.SetError() + } + errDesc := fmt.Sprintf("unknown service %v", service) + if err := t.WriteStatus(stream, codes.Unimplemented, errDesc); err != nil { + if trInfo != nil { + trInfo.tr.LazyLog(&fmtStringer{"%v", []interface{}{err}}, true) + trInfo.tr.SetError() + } + grpclog.Printf("grpc: Server.handleStream failed to write status: %v", err) + } + if trInfo != nil { + trInfo.tr.Finish() + } + return + } + // Unary RPC or Streaming RPC? + if md, ok := srv.md[method]; ok { + s.processUnaryRPC(t, stream, srv, md, trInfo) + return + } + if sd, ok := srv.sd[method]; ok { + s.processStreamingRPC(t, stream, srv, sd, trInfo) + return + } + if trInfo != nil { + trInfo.tr.LazyLog(&fmtStringer{"Unknown method %v", []interface{}{method}}, true) + trInfo.tr.SetError() + } + errDesc := fmt.Sprintf("unknown method %v", method) + if err := t.WriteStatus(stream, codes.Unimplemented, errDesc); err != nil { + if trInfo != nil { + trInfo.tr.LazyLog(&fmtStringer{"%v", []interface{}{err}}, true) + trInfo.tr.SetError() + } + grpclog.Printf("grpc: Server.handleStream failed to write status: %v", err) + } + if trInfo != nil { + trInfo.tr.Finish() + } +} + +// Stop stops the gRPC server. It immediately closes all open +// connections and listeners. +// It cancels all active RPCs on the server side and the corresponding +// pending RPCs on the client side will get notified by connection +// errors. +func (s *Server) Stop() { + s.mu.Lock() + listeners := s.lis + s.lis = nil + st := s.conns + s.conns = nil + // interrupt GracefulStop if Stop and GracefulStop are called concurrently. + s.cv.Broadcast() + s.mu.Unlock() + + for lis := range listeners { + lis.Close() + } + for c := range st { + c.Close() + } + + s.mu.Lock() + s.cancel() + if s.events != nil { + s.events.Finish() + s.events = nil + } + s.mu.Unlock() +} + +// GracefulStop stops the gRPC server gracefully. It stops the server to accept new +// connections and RPCs and blocks until all the pending RPCs are finished. +func (s *Server) GracefulStop() { + s.mu.Lock() + defer s.mu.Unlock() + if s.conns == nil { + return + } + for lis := range s.lis { + lis.Close() + } + s.lis = nil + s.cancel() + if !s.drain { + for c := range s.conns { + c.(transport.ServerTransport).Drain() + } + s.drain = true + } + for len(s.conns) != 0 { + s.cv.Wait() + } + s.conns = nil + if s.events != nil { + s.events.Finish() + s.events = nil + } +} + +func init() { + internal.TestingCloseConns = func(arg interface{}) { + arg.(*Server).testingCloseConns() + } + internal.TestingUseHandlerImpl = func(arg interface{}) { + arg.(*Server).opts.useHandlerImpl = true + } +} + +// testingCloseConns closes all existing transports but keeps s.lis +// accepting new connections. +func (s *Server) testingCloseConns() { + s.mu.Lock() + for c := range s.conns { + c.Close() + delete(s.conns, c) + } + s.mu.Unlock() +} + +// SetHeader sets the header metadata. +// When called multiple times, all the provided metadata will be merged. +// All the metadata will be sent out when one of the following happens: +// - grpc.SendHeader() is called; +// - The first response is sent out; +// - An RPC status is sent out (error or success). +func SetHeader(ctx context.Context, md metadata.MD) error { + if md.Len() == 0 { + return nil + } + stream, ok := transport.StreamFromContext(ctx) + if !ok { + return Errorf(codes.Internal, "grpc: failed to fetch the stream from the context %v", ctx) + } + return stream.SetHeader(md) +} + +// SendHeader sends header metadata. It may be called at most once. +// The provided md and headers set by SetHeader() will be sent. +func SendHeader(ctx context.Context, md metadata.MD) error { + stream, ok := transport.StreamFromContext(ctx) + if !ok { + return Errorf(codes.Internal, "grpc: failed to fetch the stream from the context %v", ctx) + } + t := stream.ServerTransport() + if t == nil { + grpclog.Fatalf("grpc: SendHeader: %v has no ServerTransport to send header metadata.", stream) + } + if err := t.WriteHeader(stream, md); err != nil { + return toRPCErr(err) + } + return nil +} + +// SetTrailer sets the trailer metadata that will be sent when an RPC returns. +// When called more than once, all the provided metadata will be merged. +func SetTrailer(ctx context.Context, md metadata.MD) error { + if md.Len() == 0 { + return nil + } + stream, ok := transport.StreamFromContext(ctx) + if !ok { + return Errorf(codes.Internal, "grpc: failed to fetch the stream from the context %v", ctx) + } + return stream.SetTrailer(md) +} diff --git a/vendor/google.golang.org/grpc/stats/handlers.go b/vendor/google.golang.org/grpc/stats/handlers.go new file mode 100644 index 0000000..26e1a8e --- /dev/null +++ b/vendor/google.golang.org/grpc/stats/handlers.go @@ -0,0 +1,76 @@ +/* + * + * Copyright 2016, Google Inc. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are + * met: + * + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following disclaimer + * in the documentation and/or other materials provided with the + * distribution. + * * Neither the name of Google Inc. nor the names of its + * contributors may be used to endorse or promote products derived from + * this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT + * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * + */ + +package stats + +import ( + "net" + + "golang.org/x/net/context" +) + +// ConnTagInfo defines the relevant information needed by connection context tagger. +type ConnTagInfo struct { + // RemoteAddr is the remote address of the corresponding connection. + RemoteAddr net.Addr + // LocalAddr is the local address of the corresponding connection. + LocalAddr net.Addr + // TODO add QOS related fields. +} + +// RPCTagInfo defines the relevant information needed by RPC context tagger. +type RPCTagInfo struct { + // FullMethodName is the RPC method in the format of /package.service/method. + FullMethodName string +} + +// Handler defines the interface for the related stats handling (e.g., RPCs, connections). +type Handler interface { + // TagRPC can attach some information to the given context. + // The returned context is used in the rest lifetime of the RPC. + TagRPC(context.Context, *RPCTagInfo) context.Context + // HandleRPC processes the RPC stats. + HandleRPC(context.Context, RPCStats) + + // TagConn can attach some information to the given context. + // The returned context will be used for stats handling. + // For conn stats handling, the context used in HandleConn for this + // connection will be derived from the context returned. + // For RPC stats handling, + // - On server side, the context used in HandleRPC for all RPCs on this + // connection will be derived from the context returned. + // - On client side, the context is not derived from the context returned. + TagConn(context.Context, *ConnTagInfo) context.Context + // HandleConn processes the Conn stats. + HandleConn(context.Context, ConnStats) +} diff --git a/vendor/google.golang.org/grpc/stats/stats.go b/vendor/google.golang.org/grpc/stats/stats.go new file mode 100644 index 0000000..a82448a --- /dev/null +++ b/vendor/google.golang.org/grpc/stats/stats.go @@ -0,0 +1,223 @@ +/* + * + * Copyright 2016, Google Inc. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are + * met: + * + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following disclaimer + * in the documentation and/or other materials provided with the + * distribution. + * * Neither the name of Google Inc. nor the names of its + * contributors may be used to endorse or promote products derived from + * this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT + * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * + */ + +// Package stats is for collecting and reporting various network and RPC stats. +// This package is for monitoring purpose only. All fields are read-only. +// All APIs are experimental. +package stats // import "google.golang.org/grpc/stats" + +import ( + "net" + "time" +) + +// RPCStats contains stats information about RPCs. +type RPCStats interface { + isRPCStats() + // IsClient returns true if this RPCStats is from client side. + IsClient() bool +} + +// Begin contains stats when an RPC begins. +// FailFast are only valid if Client is true. +type Begin struct { + // Client is true if this Begin is from client side. + Client bool + // BeginTime is the time when the RPC begins. + BeginTime time.Time + // FailFast indicates if this RPC is failfast. + FailFast bool +} + +// IsClient indicates if this is from client side. +func (s *Begin) IsClient() bool { return s.Client } + +func (s *Begin) isRPCStats() {} + +// InPayload contains the information for an incoming payload. +type InPayload struct { + // Client is true if this InPayload is from client side. + Client bool + // Payload is the payload with original type. + Payload interface{} + // Data is the serialized message payload. + Data []byte + // Length is the length of uncompressed data. + Length int + // WireLength is the length of data on wire (compressed, signed, encrypted). + WireLength int + // RecvTime is the time when the payload is received. + RecvTime time.Time +} + +// IsClient indicates if this is from client side. +func (s *InPayload) IsClient() bool { return s.Client } + +func (s *InPayload) isRPCStats() {} + +// InHeader contains stats when a header is received. +// FullMethod, addresses and Compression are only valid if Client is false. +type InHeader struct { + // Client is true if this InHeader is from client side. + Client bool + // WireLength is the wire length of header. + WireLength int + + // FullMethod is the full RPC method string, i.e., /package.service/method. + FullMethod string + // RemoteAddr is the remote address of the corresponding connection. + RemoteAddr net.Addr + // LocalAddr is the local address of the corresponding connection. + LocalAddr net.Addr + // Compression is the compression algorithm used for the RPC. + Compression string +} + +// IsClient indicates if this is from client side. +func (s *InHeader) IsClient() bool { return s.Client } + +func (s *InHeader) isRPCStats() {} + +// InTrailer contains stats when a trailer is received. +type InTrailer struct { + // Client is true if this InTrailer is from client side. + Client bool + // WireLength is the wire length of trailer. + WireLength int +} + +// IsClient indicates if this is from client side. +func (s *InTrailer) IsClient() bool { return s.Client } + +func (s *InTrailer) isRPCStats() {} + +// OutPayload contains the information for an outgoing payload. +type OutPayload struct { + // Client is true if this OutPayload is from client side. + Client bool + // Payload is the payload with original type. + Payload interface{} + // Data is the serialized message payload. + Data []byte + // Length is the length of uncompressed data. + Length int + // WireLength is the length of data on wire (compressed, signed, encrypted). + WireLength int + // SentTime is the time when the payload is sent. + SentTime time.Time +} + +// IsClient indicates if this is from client side. +func (s *OutPayload) IsClient() bool { return s.Client } + +func (s *OutPayload) isRPCStats() {} + +// OutHeader contains stats when a header is sent. +// FullMethod, addresses and Compression are only valid if Client is true. +type OutHeader struct { + // Client is true if this OutHeader is from client side. + Client bool + // WireLength is the wire length of header. + WireLength int + + // FullMethod is the full RPC method string, i.e., /package.service/method. + FullMethod string + // RemoteAddr is the remote address of the corresponding connection. + RemoteAddr net.Addr + // LocalAddr is the local address of the corresponding connection. + LocalAddr net.Addr + // Compression is the compression algorithm used for the RPC. + Compression string +} + +// IsClient indicates if this is from client side. +func (s *OutHeader) IsClient() bool { return s.Client } + +func (s *OutHeader) isRPCStats() {} + +// OutTrailer contains stats when a trailer is sent. +type OutTrailer struct { + // Client is true if this OutTrailer is from client side. + Client bool + // WireLength is the wire length of trailer. + WireLength int +} + +// IsClient indicates if this is from client side. +func (s *OutTrailer) IsClient() bool { return s.Client } + +func (s *OutTrailer) isRPCStats() {} + +// End contains stats when an RPC ends. +type End struct { + // Client is true if this End is from client side. + Client bool + // EndTime is the time when the RPC ends. + EndTime time.Time + // Error is the error just happened. Its type is gRPC error. + Error error +} + +// IsClient indicates if this is from client side. +func (s *End) IsClient() bool { return s.Client } + +func (s *End) isRPCStats() {} + +// ConnStats contains stats information about connections. +type ConnStats interface { + isConnStats() + // IsClient returns true if this ConnStats is from client side. + IsClient() bool +} + +// ConnBegin contains the stats of a connection when it is established. +type ConnBegin struct { + // Client is true if this ConnBegin is from client side. + Client bool +} + +// IsClient indicates if this is from client side. +func (s *ConnBegin) IsClient() bool { return s.Client } + +func (s *ConnBegin) isConnStats() {} + +// ConnEnd contains the stats of a connection when it ends. +type ConnEnd struct { + // Client is true if this ConnEnd is from client side. + Client bool +} + +// IsClient indicates if this is from client side. +func (s *ConnEnd) IsClient() bool { return s.Client } + +func (s *ConnEnd) isConnStats() {} diff --git a/vendor/google.golang.org/grpc/stream.go b/vendor/google.golang.org/grpc/stream.go new file mode 100644 index 0000000..bb468dc --- /dev/null +++ b/vendor/google.golang.org/grpc/stream.go @@ -0,0 +1,625 @@ +/* + * + * Copyright 2014, Google Inc. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are + * met: + * + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following disclaimer + * in the documentation and/or other materials provided with the + * distribution. + * * Neither the name of Google Inc. nor the names of its + * contributors may be used to endorse or promote products derived from + * this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT + * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * + */ + +package grpc + +import ( + "bytes" + "errors" + "io" + "math" + "sync" + "time" + + "golang.org/x/net/context" + "golang.org/x/net/trace" + "google.golang.org/grpc/codes" + "google.golang.org/grpc/metadata" + "google.golang.org/grpc/stats" + "google.golang.org/grpc/transport" +) + +// StreamHandler defines the handler called by gRPC server to complete the +// execution of a streaming RPC. +type StreamHandler func(srv interface{}, stream ServerStream) error + +// StreamDesc represents a streaming RPC service's method specification. +type StreamDesc struct { + StreamName string + Handler StreamHandler + + // At least one of these is true. + ServerStreams bool + ClientStreams bool +} + +// Stream defines the common interface a client or server stream has to satisfy. +type Stream interface { + // Context returns the context for this stream. + Context() context.Context + // SendMsg blocks until it sends m, the stream is done or the stream + // breaks. + // On error, it aborts the stream and returns an RPC status on client + // side. On server side, it simply returns the error to the caller. + // SendMsg is called by generated code. Also Users can call SendMsg + // directly when it is really needed in their use cases. + SendMsg(m interface{}) error + // RecvMsg blocks until it receives a message or the stream is + // done. On client side, it returns io.EOF when the stream is done. On + // any other error, it aborts the stream and returns an RPC status. On + // server side, it simply returns the error to the caller. + RecvMsg(m interface{}) error +} + +// ClientStream defines the interface a client stream has to satisfy. +type ClientStream interface { + // Header returns the header metadata received from the server if there + // is any. It blocks if the metadata is not ready to read. + Header() (metadata.MD, error) + // Trailer returns the trailer metadata from the server, if there is any. + // It must only be called after stream.CloseAndRecv has returned, or + // stream.Recv has returned a non-nil error (including io.EOF). + Trailer() metadata.MD + // CloseSend closes the send direction of the stream. It closes the stream + // when non-nil error is met. + CloseSend() error + Stream +} + +// NewClientStream creates a new Stream for the client side. This is called +// by generated code. +func NewClientStream(ctx context.Context, desc *StreamDesc, cc *ClientConn, method string, opts ...CallOption) (_ ClientStream, err error) { + if cc.dopts.streamInt != nil { + return cc.dopts.streamInt(ctx, desc, cc, method, newClientStream, opts...) + } + return newClientStream(ctx, desc, cc, method, opts...) +} + +func newClientStream(ctx context.Context, desc *StreamDesc, cc *ClientConn, method string, opts ...CallOption) (_ ClientStream, err error) { + var ( + t transport.ClientTransport + s *transport.Stream + put func() + cancel context.CancelFunc + ) + c := defaultCallInfo + if mc, ok := cc.getMethodConfig(method); ok { + c.failFast = !mc.WaitForReady + if mc.Timeout > 0 { + ctx, cancel = context.WithTimeout(ctx, mc.Timeout) + } + } + for _, o := range opts { + if err := o.before(&c); err != nil { + return nil, toRPCErr(err) + } + } + callHdr := &transport.CallHdr{ + Host: cc.authority, + Method: method, + Flush: desc.ServerStreams && desc.ClientStreams, + } + if cc.dopts.cp != nil { + callHdr.SendCompress = cc.dopts.cp.Type() + } + var trInfo traceInfo + if EnableTracing { + trInfo.tr = trace.New("grpc.Sent."+methodFamily(method), method) + trInfo.firstLine.client = true + if deadline, ok := ctx.Deadline(); ok { + trInfo.firstLine.deadline = deadline.Sub(time.Now()) + } + trInfo.tr.LazyLog(&trInfo.firstLine, false) + ctx = trace.NewContext(ctx, trInfo.tr) + defer func() { + if err != nil { + // Need to call tr.finish() if error is returned. + // Because tr will not be returned to caller. + trInfo.tr.LazyPrintf("RPC: [%v]", err) + trInfo.tr.SetError() + trInfo.tr.Finish() + } + }() + } + sh := cc.dopts.copts.StatsHandler + if sh != nil { + ctx = sh.TagRPC(ctx, &stats.RPCTagInfo{FullMethodName: method}) + begin := &stats.Begin{ + Client: true, + BeginTime: time.Now(), + FailFast: c.failFast, + } + sh.HandleRPC(ctx, begin) + } + defer func() { + if err != nil && sh != nil { + // Only handle end stats if err != nil. + end := &stats.End{ + Client: true, + Error: err, + } + sh.HandleRPC(ctx, end) + } + }() + gopts := BalancerGetOptions{ + BlockingWait: !c.failFast, + } + for { + t, put, err = cc.getTransport(ctx, gopts) + if err != nil { + // TODO(zhaoq): Probably revisit the error handling. + if _, ok := err.(*rpcError); ok { + return nil, err + } + if err == errConnClosing || err == errConnUnavailable { + if c.failFast { + return nil, Errorf(codes.Unavailable, "%v", err) + } + continue + } + // All the other errors are treated as Internal errors. + return nil, Errorf(codes.Internal, "%v", err) + } + + s, err = t.NewStream(ctx, callHdr) + if err != nil { + if put != nil { + put() + put = nil + } + if _, ok := err.(transport.ConnectionError); ok || err == transport.ErrStreamDrain { + if c.failFast { + return nil, toRPCErr(err) + } + continue + } + return nil, toRPCErr(err) + } + break + } + cs := &clientStream{ + opts: opts, + c: c, + desc: desc, + codec: cc.dopts.codec, + cp: cc.dopts.cp, + dc: cc.dopts.dc, + cancel: cancel, + + put: put, + t: t, + s: s, + p: &parser{r: s}, + + tracing: EnableTracing, + trInfo: trInfo, + + statsCtx: ctx, + statsHandler: cc.dopts.copts.StatsHandler, + } + if cc.dopts.cp != nil { + cs.cbuf = new(bytes.Buffer) + } + // Listen on ctx.Done() to detect cancellation and s.Done() to detect normal termination + // when there is no pending I/O operations on this stream. + go func() { + select { + case <-t.Error(): + // Incur transport error, simply exit. + case <-s.Done(): + // TODO: The trace of the RPC is terminated here when there is no pending + // I/O, which is probably not the optimal solution. + if s.StatusCode() == codes.OK { + cs.finish(nil) + } else { + cs.finish(Errorf(s.StatusCode(), "%s", s.StatusDesc())) + } + cs.closeTransportStream(nil) + case <-s.GoAway(): + cs.finish(errConnDrain) + cs.closeTransportStream(errConnDrain) + case <-s.Context().Done(): + err := s.Context().Err() + cs.finish(err) + cs.closeTransportStream(transport.ContextErr(err)) + } + }() + return cs, nil +} + +// clientStream implements a client side Stream. +type clientStream struct { + opts []CallOption + c callInfo + t transport.ClientTransport + s *transport.Stream + p *parser + desc *StreamDesc + codec Codec + cp Compressor + cbuf *bytes.Buffer + dc Decompressor + cancel context.CancelFunc + + tracing bool // set to EnableTracing when the clientStream is created. + + mu sync.Mutex + put func() + closed bool + // trInfo.tr is set when the clientStream is created (if EnableTracing is true), + // and is set to nil when the clientStream's finish method is called. + trInfo traceInfo + + // statsCtx keeps the user context for stats handling. + // All stats collection should use the statsCtx (instead of the stream context) + // so that all the generated stats for a particular RPC can be associated in the processing phase. + statsCtx context.Context + statsHandler stats.Handler +} + +func (cs *clientStream) Context() context.Context { + return cs.s.Context() +} + +func (cs *clientStream) Header() (metadata.MD, error) { + m, err := cs.s.Header() + if err != nil { + if _, ok := err.(transport.ConnectionError); !ok { + cs.closeTransportStream(err) + } + } + return m, err +} + +func (cs *clientStream) Trailer() metadata.MD { + return cs.s.Trailer() +} + +func (cs *clientStream) SendMsg(m interface{}) (err error) { + if cs.tracing { + cs.mu.Lock() + if cs.trInfo.tr != nil { + cs.trInfo.tr.LazyLog(&payload{sent: true, msg: m}, true) + } + cs.mu.Unlock() + } + // TODO Investigate how to signal the stats handling party. + // generate error stats if err != nil && err != io.EOF? + defer func() { + if err != nil { + cs.finish(err) + } + if err == nil { + return + } + if err == io.EOF { + // Specialize the process for server streaming. SendMesg is only called + // once when creating the stream object. io.EOF needs to be skipped when + // the rpc is early finished (before the stream object is created.). + // TODO: It is probably better to move this into the generated code. + if !cs.desc.ClientStreams && cs.desc.ServerStreams { + err = nil + } + return + } + if _, ok := err.(transport.ConnectionError); !ok { + cs.closeTransportStream(err) + } + err = toRPCErr(err) + }() + var outPayload *stats.OutPayload + if cs.statsHandler != nil { + outPayload = &stats.OutPayload{ + Client: true, + } + } + out, err := encode(cs.codec, m, cs.cp, cs.cbuf, outPayload) + defer func() { + if cs.cbuf != nil { + cs.cbuf.Reset() + } + }() + if err != nil { + return Errorf(codes.Internal, "grpc: %v", err) + } + err = cs.t.Write(cs.s, out, &transport.Options{Last: false}) + if err == nil && outPayload != nil { + outPayload.SentTime = time.Now() + cs.statsHandler.HandleRPC(cs.statsCtx, outPayload) + } + return err +} + +func (cs *clientStream) RecvMsg(m interface{}) (err error) { + defer func() { + if err != nil && cs.statsHandler != nil { + // Only generate End if err != nil. + // If err == nil, it's not the last RecvMsg. + // The last RecvMsg gets either an RPC error or io.EOF. + end := &stats.End{ + Client: true, + EndTime: time.Now(), + } + if err != io.EOF { + end.Error = toRPCErr(err) + } + cs.statsHandler.HandleRPC(cs.statsCtx, end) + } + }() + var inPayload *stats.InPayload + if cs.statsHandler != nil { + inPayload = &stats.InPayload{ + Client: true, + } + } + err = recv(cs.p, cs.codec, cs.s, cs.dc, m, math.MaxInt32, inPayload) + defer func() { + // err != nil indicates the termination of the stream. + if err != nil { + cs.finish(err) + } + }() + if err == nil { + if cs.tracing { + cs.mu.Lock() + if cs.trInfo.tr != nil { + cs.trInfo.tr.LazyLog(&payload{sent: false, msg: m}, true) + } + cs.mu.Unlock() + } + if inPayload != nil { + cs.statsHandler.HandleRPC(cs.statsCtx, inPayload) + } + if !cs.desc.ClientStreams || cs.desc.ServerStreams { + return + } + // Special handling for client streaming rpc. + // This recv expects EOF or errors, so we don't collect inPayload. + err = recv(cs.p, cs.codec, cs.s, cs.dc, m, math.MaxInt32, nil) + cs.closeTransportStream(err) + if err == nil { + return toRPCErr(errors.New("grpc: client streaming protocol violation: get , want ")) + } + if err == io.EOF { + if cs.s.StatusCode() == codes.OK { + cs.finish(err) + return nil + } + return Errorf(cs.s.StatusCode(), "%s", cs.s.StatusDesc()) + } + return toRPCErr(err) + } + if _, ok := err.(transport.ConnectionError); !ok { + cs.closeTransportStream(err) + } + if err == io.EOF { + if cs.s.StatusCode() == codes.OK { + // Returns io.EOF to indicate the end of the stream. + return + } + return Errorf(cs.s.StatusCode(), "%s", cs.s.StatusDesc()) + } + return toRPCErr(err) +} + +func (cs *clientStream) CloseSend() (err error) { + err = cs.t.Write(cs.s, nil, &transport.Options{Last: true}) + defer func() { + if err != nil { + cs.finish(err) + } + }() + if err == nil || err == io.EOF { + return nil + } + if _, ok := err.(transport.ConnectionError); !ok { + cs.closeTransportStream(err) + } + err = toRPCErr(err) + return +} + +func (cs *clientStream) closeTransportStream(err error) { + cs.mu.Lock() + if cs.closed { + cs.mu.Unlock() + return + } + cs.closed = true + cs.mu.Unlock() + cs.t.CloseStream(cs.s, err) +} + +func (cs *clientStream) finish(err error) { + defer func() { + if cs.cancel != nil { + cs.cancel() + } + }() + cs.mu.Lock() + defer cs.mu.Unlock() + for _, o := range cs.opts { + o.after(&cs.c) + } + if cs.put != nil { + cs.put() + cs.put = nil + } + if !cs.tracing { + return + } + if cs.trInfo.tr != nil { + if err == nil || err == io.EOF { + cs.trInfo.tr.LazyPrintf("RPC: [OK]") + } else { + cs.trInfo.tr.LazyPrintf("RPC: [%v]", err) + cs.trInfo.tr.SetError() + } + cs.trInfo.tr.Finish() + cs.trInfo.tr = nil + } +} + +// ServerStream defines the interface a server stream has to satisfy. +type ServerStream interface { + // SetHeader sets the header metadata. It may be called multiple times. + // When call multiple times, all the provided metadata will be merged. + // All the metadata will be sent out when one of the following happens: + // - ServerStream.SendHeader() is called; + // - The first response is sent out; + // - An RPC status is sent out (error or success). + SetHeader(metadata.MD) error + // SendHeader sends the header metadata. + // The provided md and headers set by SetHeader() will be sent. + // It fails if called multiple times. + SendHeader(metadata.MD) error + // SetTrailer sets the trailer metadata which will be sent with the RPC status. + // When called more than once, all the provided metadata will be merged. + SetTrailer(metadata.MD) + Stream +} + +// serverStream implements a server side Stream. +type serverStream struct { + t transport.ServerTransport + s *transport.Stream + p *parser + codec Codec + cp Compressor + dc Decompressor + cbuf *bytes.Buffer + maxMsgSize int + statusCode codes.Code + statusDesc string + trInfo *traceInfo + + statsHandler stats.Handler + + mu sync.Mutex // protects trInfo.tr after the service handler runs. +} + +func (ss *serverStream) Context() context.Context { + return ss.s.Context() +} + +func (ss *serverStream) SetHeader(md metadata.MD) error { + if md.Len() == 0 { + return nil + } + return ss.s.SetHeader(md) +} + +func (ss *serverStream) SendHeader(md metadata.MD) error { + return ss.t.WriteHeader(ss.s, md) +} + +func (ss *serverStream) SetTrailer(md metadata.MD) { + if md.Len() == 0 { + return + } + ss.s.SetTrailer(md) + return +} + +func (ss *serverStream) SendMsg(m interface{}) (err error) { + defer func() { + if ss.trInfo != nil { + ss.mu.Lock() + if ss.trInfo.tr != nil { + if err == nil { + ss.trInfo.tr.LazyLog(&payload{sent: true, msg: m}, true) + } else { + ss.trInfo.tr.LazyLog(&fmtStringer{"%v", []interface{}{err}}, true) + ss.trInfo.tr.SetError() + } + } + ss.mu.Unlock() + } + }() + var outPayload *stats.OutPayload + if ss.statsHandler != nil { + outPayload = &stats.OutPayload{} + } + out, err := encode(ss.codec, m, ss.cp, ss.cbuf, outPayload) + defer func() { + if ss.cbuf != nil { + ss.cbuf.Reset() + } + }() + if err != nil { + err = Errorf(codes.Internal, "grpc: %v", err) + return err + } + if err := ss.t.Write(ss.s, out, &transport.Options{Last: false}); err != nil { + return toRPCErr(err) + } + if outPayload != nil { + outPayload.SentTime = time.Now() + ss.statsHandler.HandleRPC(ss.s.Context(), outPayload) + } + return nil +} + +func (ss *serverStream) RecvMsg(m interface{}) (err error) { + defer func() { + if ss.trInfo != nil { + ss.mu.Lock() + if ss.trInfo.tr != nil { + if err == nil { + ss.trInfo.tr.LazyLog(&payload{sent: false, msg: m}, true) + } else if err != io.EOF { + ss.trInfo.tr.LazyLog(&fmtStringer{"%v", []interface{}{err}}, true) + ss.trInfo.tr.SetError() + } + } + ss.mu.Unlock() + } + }() + var inPayload *stats.InPayload + if ss.statsHandler != nil { + inPayload = &stats.InPayload{} + } + if err := recv(ss.p, ss.codec, ss.s, ss.dc, m, ss.maxMsgSize, inPayload); err != nil { + if err == io.EOF { + return err + } + if err == io.ErrUnexpectedEOF { + err = Errorf(codes.Internal, io.ErrUnexpectedEOF.Error()) + } + return toRPCErr(err) + } + if inPayload != nil { + ss.statsHandler.HandleRPC(ss.s.Context(), inPayload) + } + return nil +} diff --git a/vendor/google.golang.org/grpc/tap/tap.go b/vendor/google.golang.org/grpc/tap/tap.go new file mode 100644 index 0000000..0f36647 --- /dev/null +++ b/vendor/google.golang.org/grpc/tap/tap.go @@ -0,0 +1,54 @@ +/* + * + * Copyright 2016, Google Inc. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are + * met: + * + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following disclaimer + * in the documentation and/or other materials provided with the + * distribution. + * * Neither the name of Google Inc. nor the names of its + * contributors may be used to endorse or promote products derived from + * this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT + * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * + */ + +// Package tap defines the function handles which are executed on the transport +// layer of gRPC-Go and related information. Everything here is EXPERIMENTAL. +package tap + +import ( + "golang.org/x/net/context" +) + +// Info defines the relevant information needed by the handles. +type Info struct { + // FullMethodName is the string of grpc method (in the format of + // /package.service/method). + FullMethodName string + // TODO: More to be added. +} + +// ServerInHandle defines the function which runs when a new stream is created +// on the server side. Note that it is executed in the per-connection I/O goroutine(s) instead +// of per-RPC goroutine. Therefore, users should NOT have any blocking/time-consuming +// work in this handle. Otherwise all the RPCs would slow down. +type ServerInHandle func(ctx context.Context, info *Info) (context.Context, error) diff --git a/vendor/google.golang.org/grpc/trace.go b/vendor/google.golang.org/grpc/trace.go new file mode 100644 index 0000000..f6747e1 --- /dev/null +++ b/vendor/google.golang.org/grpc/trace.go @@ -0,0 +1,119 @@ +/* + * + * Copyright 2015, Google Inc. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are + * met: + * + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following disclaimer + * in the documentation and/or other materials provided with the + * distribution. + * * Neither the name of Google Inc. nor the names of its + * contributors may be used to endorse or promote products derived from + * this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT + * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * + */ + +package grpc + +import ( + "bytes" + "fmt" + "io" + "net" + "strings" + "time" + + "golang.org/x/net/trace" +) + +// EnableTracing controls whether to trace RPCs using the golang.org/x/net/trace package. +// This should only be set before any RPCs are sent or received by this program. +var EnableTracing = true + +// methodFamily returns the trace family for the given method. +// It turns "/pkg.Service/GetFoo" into "pkg.Service". +func methodFamily(m string) string { + m = strings.TrimPrefix(m, "/") // remove leading slash + if i := strings.Index(m, "/"); i >= 0 { + m = m[:i] // remove everything from second slash + } + if i := strings.LastIndex(m, "."); i >= 0 { + m = m[i+1:] // cut down to last dotted component + } + return m +} + +// traceInfo contains tracing information for an RPC. +type traceInfo struct { + tr trace.Trace + firstLine firstLine +} + +// firstLine is the first line of an RPC trace. +type firstLine struct { + client bool // whether this is a client (outgoing) RPC + remoteAddr net.Addr + deadline time.Duration // may be zero +} + +func (f *firstLine) String() string { + var line bytes.Buffer + io.WriteString(&line, "RPC: ") + if f.client { + io.WriteString(&line, "to") + } else { + io.WriteString(&line, "from") + } + fmt.Fprintf(&line, " %v deadline:", f.remoteAddr) + if f.deadline != 0 { + fmt.Fprint(&line, f.deadline) + } else { + io.WriteString(&line, "none") + } + return line.String() +} + +// payload represents an RPC request or response payload. +type payload struct { + sent bool // whether this is an outgoing payload + msg interface{} // e.g. a proto.Message + // TODO(dsymonds): add stringifying info to codec, and limit how much we hold here? +} + +func (p payload) String() string { + if p.sent { + return fmt.Sprintf("sent: %v", p.msg) + } + return fmt.Sprintf("recv: %v", p.msg) +} + +type fmtStringer struct { + format string + a []interface{} +} + +func (f *fmtStringer) String() string { + return fmt.Sprintf(f.format, f.a...) +} + +type stringer string + +func (s stringer) String() string { return string(s) } diff --git a/vendor/google.golang.org/grpc/transport/control.go b/vendor/google.golang.org/grpc/transport/control.go new file mode 100644 index 0000000..2586cba --- /dev/null +++ b/vendor/google.golang.org/grpc/transport/control.go @@ -0,0 +1,193 @@ +/* + * + * Copyright 2014, Google Inc. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are + * met: + * + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following disclaimer + * in the documentation and/or other materials provided with the + * distribution. + * * Neither the name of Google Inc. nor the names of its + * contributors may be used to endorse or promote products derived from + * this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT + * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * + */ + +package transport + +import ( + "fmt" + "sync" + + "golang.org/x/net/http2" +) + +const ( + // The default value of flow control window size in HTTP2 spec. + defaultWindowSize = 65535 + // The initial window size for flow control. + initialWindowSize = defaultWindowSize // for an RPC + initialConnWindowSize = defaultWindowSize * 16 // for a connection +) + +// The following defines various control items which could flow through +// the control buffer of transport. They represent different aspects of +// control tasks, e.g., flow control, settings, streaming resetting, etc. +type windowUpdate struct { + streamID uint32 + increment uint32 +} + +func (*windowUpdate) item() {} + +type settings struct { + ack bool + ss []http2.Setting +} + +func (*settings) item() {} + +type resetStream struct { + streamID uint32 + code http2.ErrCode +} + +func (*resetStream) item() {} + +type goAway struct { +} + +func (*goAway) item() {} + +type flushIO struct { +} + +func (*flushIO) item() {} + +type ping struct { + ack bool + data [8]byte +} + +func (*ping) item() {} + +// quotaPool is a pool which accumulates the quota and sends it to acquire() +// when it is available. +type quotaPool struct { + c chan int + + mu sync.Mutex + quota int +} + +// newQuotaPool creates a quotaPool which has quota q available to consume. +func newQuotaPool(q int) *quotaPool { + qb := "aPool{ + c: make(chan int, 1), + } + if q > 0 { + qb.c <- q + } else { + qb.quota = q + } + return qb +} + +// add cancels the pending quota sent on acquired, incremented by v and sends +// it back on acquire. +func (qb *quotaPool) add(v int) { + qb.mu.Lock() + defer qb.mu.Unlock() + select { + case n := <-qb.c: + qb.quota += n + default: + } + qb.quota += v + if qb.quota <= 0 { + return + } + // After the pool has been created, this is the only place that sends on + // the channel. Since mu is held at this point and any quota that was sent + // on the channel has been retrieved, we know that this code will always + // place any positive quota value on the channel. + select { + case qb.c <- qb.quota: + qb.quota = 0 + default: + } +} + +// acquire returns the channel on which available quota amounts are sent. +func (qb *quotaPool) acquire() <-chan int { + return qb.c +} + +// inFlow deals with inbound flow control +type inFlow struct { + // The inbound flow control limit for pending data. + limit uint32 + + mu sync.Mutex + // pendingData is the overall data which have been received but not been + // consumed by applications. + pendingData uint32 + // The amount of data the application has consumed but grpc has not sent + // window update for them. Used to reduce window update frequency. + pendingUpdate uint32 +} + +// onData is invoked when some data frame is received. It updates pendingData. +func (f *inFlow) onData(n uint32) error { + f.mu.Lock() + defer f.mu.Unlock() + f.pendingData += n + if f.pendingData+f.pendingUpdate > f.limit { + return fmt.Errorf("received %d-bytes data exceeding the limit %d bytes", f.pendingData+f.pendingUpdate, f.limit) + } + return nil +} + +// onRead is invoked when the application reads the data. It returns the window size +// to be sent to the peer. +func (f *inFlow) onRead(n uint32) uint32 { + f.mu.Lock() + defer f.mu.Unlock() + if f.pendingData == 0 { + return 0 + } + f.pendingData -= n + f.pendingUpdate += n + if f.pendingUpdate >= f.limit/4 { + wu := f.pendingUpdate + f.pendingUpdate = 0 + return wu + } + return 0 +} + +func (f *inFlow) resetPendingData() uint32 { + f.mu.Lock() + defer f.mu.Unlock() + n := f.pendingData + f.pendingData = 0 + return n +} diff --git a/vendor/google.golang.org/grpc/transport/go16.go b/vendor/google.golang.org/grpc/transport/go16.go new file mode 100644 index 0000000..ee1c46b --- /dev/null +++ b/vendor/google.golang.org/grpc/transport/go16.go @@ -0,0 +1,46 @@ +// +build go1.6,!go1.7 + +/* + * Copyright 2016, Google Inc. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are + * met: + * + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following disclaimer + * in the documentation and/or other materials provided with the + * distribution. + * * Neither the name of Google Inc. nor the names of its + * contributors may be used to endorse or promote products derived from + * this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT + * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * + */ + +package transport + +import ( + "net" + + "golang.org/x/net/context" +) + +// dialContext connects to the address on the named network. +func dialContext(ctx context.Context, network, address string) (net.Conn, error) { + return (&net.Dialer{Cancel: ctx.Done()}).Dial(network, address) +} diff --git a/vendor/google.golang.org/grpc/transport/go17.go b/vendor/google.golang.org/grpc/transport/go17.go new file mode 100644 index 0000000..356f13f --- /dev/null +++ b/vendor/google.golang.org/grpc/transport/go17.go @@ -0,0 +1,46 @@ +// +build go1.7 + +/* + * Copyright 2016, Google Inc. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are + * met: + * + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following disclaimer + * in the documentation and/or other materials provided with the + * distribution. + * * Neither the name of Google Inc. nor the names of its + * contributors may be used to endorse or promote products derived from + * this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT + * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * + */ + +package transport + +import ( + "net" + + "golang.org/x/net/context" +) + +// dialContext connects to the address on the named network. +func dialContext(ctx context.Context, network, address string) (net.Conn, error) { + return (&net.Dialer{}).DialContext(ctx, network, address) +} diff --git a/vendor/google.golang.org/grpc/transport/handler_server.go b/vendor/google.golang.org/grpc/transport/handler_server.go new file mode 100644 index 0000000..10b6dc0 --- /dev/null +++ b/vendor/google.golang.org/grpc/transport/handler_server.go @@ -0,0 +1,397 @@ +/* + * Copyright 2016, Google Inc. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are + * met: + * + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following disclaimer + * in the documentation and/or other materials provided with the + * distribution. + * * Neither the name of Google Inc. nor the names of its + * contributors may be used to endorse or promote products derived from + * this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT + * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * + */ + +// This file is the implementation of a gRPC server using HTTP/2 which +// uses the standard Go http2 Server implementation (via the +// http.Handler interface), rather than speaking low-level HTTP/2 +// frames itself. It is the implementation of *grpc.Server.ServeHTTP. + +package transport + +import ( + "errors" + "fmt" + "io" + "net" + "net/http" + "strings" + "sync" + "time" + + "golang.org/x/net/context" + "golang.org/x/net/http2" + "google.golang.org/grpc/codes" + "google.golang.org/grpc/credentials" + "google.golang.org/grpc/metadata" + "google.golang.org/grpc/peer" +) + +// NewServerHandlerTransport returns a ServerTransport handling gRPC +// from inside an http.Handler. It requires that the http Server +// supports HTTP/2. +func NewServerHandlerTransport(w http.ResponseWriter, r *http.Request) (ServerTransport, error) { + if r.ProtoMajor != 2 { + return nil, errors.New("gRPC requires HTTP/2") + } + if r.Method != "POST" { + return nil, errors.New("invalid gRPC request method") + } + if !validContentType(r.Header.Get("Content-Type")) { + return nil, errors.New("invalid gRPC request content-type") + } + if _, ok := w.(http.Flusher); !ok { + return nil, errors.New("gRPC requires a ResponseWriter supporting http.Flusher") + } + if _, ok := w.(http.CloseNotifier); !ok { + return nil, errors.New("gRPC requires a ResponseWriter supporting http.CloseNotifier") + } + + st := &serverHandlerTransport{ + rw: w, + req: r, + closedCh: make(chan struct{}), + writes: make(chan func()), + } + + if v := r.Header.Get("grpc-timeout"); v != "" { + to, err := decodeTimeout(v) + if err != nil { + return nil, streamErrorf(codes.Internal, "malformed time-out: %v", err) + } + st.timeoutSet = true + st.timeout = to + } + + var metakv []string + if r.Host != "" { + metakv = append(metakv, ":authority", r.Host) + } + for k, vv := range r.Header { + k = strings.ToLower(k) + if isReservedHeader(k) && !isWhitelistedPseudoHeader(k) { + continue + } + for _, v := range vv { + if k == "user-agent" { + // user-agent is special. Copying logic of http_util.go. + if i := strings.LastIndex(v, " "); i == -1 { + // There is no application user agent string being set + continue + } else { + v = v[:i] + } + } + metakv = append(metakv, k, v) + } + } + st.headerMD = metadata.Pairs(metakv...) + + return st, nil +} + +// serverHandlerTransport is an implementation of ServerTransport +// which replies to exactly one gRPC request (exactly one HTTP request), +// using the net/http.Handler interface. This http.Handler is guaranteed +// at this point to be speaking over HTTP/2, so it's able to speak valid +// gRPC. +type serverHandlerTransport struct { + rw http.ResponseWriter + req *http.Request + timeoutSet bool + timeout time.Duration + didCommonHeaders bool + + headerMD metadata.MD + + closeOnce sync.Once + closedCh chan struct{} // closed on Close + + // writes is a channel of code to run serialized in the + // ServeHTTP (HandleStreams) goroutine. The channel is closed + // when WriteStatus is called. + writes chan func() +} + +func (ht *serverHandlerTransport) Close() error { + ht.closeOnce.Do(ht.closeCloseChanOnce) + return nil +} + +func (ht *serverHandlerTransport) closeCloseChanOnce() { close(ht.closedCh) } + +func (ht *serverHandlerTransport) RemoteAddr() net.Addr { return strAddr(ht.req.RemoteAddr) } + +// strAddr is a net.Addr backed by either a TCP "ip:port" string, or +// the empty string if unknown. +type strAddr string + +func (a strAddr) Network() string { + if a != "" { + // Per the documentation on net/http.Request.RemoteAddr, if this is + // set, it's set to the IP:port of the peer (hence, TCP): + // https://golang.org/pkg/net/http/#Request + // + // If we want to support Unix sockets later, we can + // add our own grpc-specific convention within the + // grpc codebase to set RemoteAddr to a different + // format, or probably better: we can attach it to the + // context and use that from serverHandlerTransport.RemoteAddr. + return "tcp" + } + return "" +} + +func (a strAddr) String() string { return string(a) } + +// do runs fn in the ServeHTTP goroutine. +func (ht *serverHandlerTransport) do(fn func()) error { + select { + case ht.writes <- fn: + return nil + case <-ht.closedCh: + return ErrConnClosing + } +} + +func (ht *serverHandlerTransport) WriteStatus(s *Stream, statusCode codes.Code, statusDesc string) error { + err := ht.do(func() { + ht.writeCommonHeaders(s) + + // And flush, in case no header or body has been sent yet. + // This forces a separation of headers and trailers if this is the + // first call (for example, in end2end tests's TestNoService). + ht.rw.(http.Flusher).Flush() + + h := ht.rw.Header() + h.Set("Grpc-Status", fmt.Sprintf("%d", statusCode)) + if statusDesc != "" { + h.Set("Grpc-Message", encodeGrpcMessage(statusDesc)) + } + if md := s.Trailer(); len(md) > 0 { + for k, vv := range md { + // Clients don't tolerate reading restricted headers after some non restricted ones were sent. + if isReservedHeader(k) { + continue + } + for _, v := range vv { + // http2 ResponseWriter mechanism to + // send undeclared Trailers after the + // headers have possibly been written. + h.Add(http2.TrailerPrefix+k, v) + } + } + } + }) + close(ht.writes) + return err +} + +// writeCommonHeaders sets common headers on the first write +// call (Write, WriteHeader, or WriteStatus). +func (ht *serverHandlerTransport) writeCommonHeaders(s *Stream) { + if ht.didCommonHeaders { + return + } + ht.didCommonHeaders = true + + h := ht.rw.Header() + h["Date"] = nil // suppress Date to make tests happy; TODO: restore + h.Set("Content-Type", "application/grpc") + + // Predeclare trailers we'll set later in WriteStatus (after the body). + // This is a SHOULD in the HTTP RFC, and the way you add (known) + // Trailers per the net/http.ResponseWriter contract. + // See https://golang.org/pkg/net/http/#ResponseWriter + // and https://golang.org/pkg/net/http/#example_ResponseWriter_trailers + h.Add("Trailer", "Grpc-Status") + h.Add("Trailer", "Grpc-Message") + + if s.sendCompress != "" { + h.Set("Grpc-Encoding", s.sendCompress) + } +} + +func (ht *serverHandlerTransport) Write(s *Stream, data []byte, opts *Options) error { + return ht.do(func() { + ht.writeCommonHeaders(s) + ht.rw.Write(data) + if !opts.Delay { + ht.rw.(http.Flusher).Flush() + } + }) +} + +func (ht *serverHandlerTransport) WriteHeader(s *Stream, md metadata.MD) error { + return ht.do(func() { + ht.writeCommonHeaders(s) + h := ht.rw.Header() + for k, vv := range md { + // Clients don't tolerate reading restricted headers after some non restricted ones were sent. + if isReservedHeader(k) { + continue + } + for _, v := range vv { + h.Add(k, v) + } + } + ht.rw.WriteHeader(200) + ht.rw.(http.Flusher).Flush() + }) +} + +func (ht *serverHandlerTransport) HandleStreams(startStream func(*Stream), traceCtx func(context.Context, string) context.Context) { + // With this transport type there will be exactly 1 stream: this HTTP request. + + var ctx context.Context + var cancel context.CancelFunc + if ht.timeoutSet { + ctx, cancel = context.WithTimeout(context.Background(), ht.timeout) + } else { + ctx, cancel = context.WithCancel(context.Background()) + } + + // requestOver is closed when either the request's context is done + // or the status has been written via WriteStatus. + requestOver := make(chan struct{}) + + // clientGone receives a single value if peer is gone, either + // because the underlying connection is dead or because the + // peer sends an http2 RST_STREAM. + clientGone := ht.rw.(http.CloseNotifier).CloseNotify() + go func() { + select { + case <-requestOver: + return + case <-ht.closedCh: + case <-clientGone: + } + cancel() + }() + + req := ht.req + + s := &Stream{ + id: 0, // irrelevant + windowHandler: func(int) {}, // nothing + cancel: cancel, + buf: newRecvBuffer(), + st: ht, + method: req.URL.Path, + recvCompress: req.Header.Get("grpc-encoding"), + } + pr := &peer.Peer{ + Addr: ht.RemoteAddr(), + } + if req.TLS != nil { + pr.AuthInfo = credentials.TLSInfo{State: *req.TLS} + } + ctx = metadata.NewContext(ctx, ht.headerMD) + ctx = peer.NewContext(ctx, pr) + s.ctx = newContextWithStream(ctx, s) + s.dec = &recvBufferReader{ctx: s.ctx, recv: s.buf} + + // readerDone is closed when the Body.Read-ing goroutine exits. + readerDone := make(chan struct{}) + go func() { + defer close(readerDone) + + // TODO: minimize garbage, optimize recvBuffer code/ownership + const readSize = 8196 + for buf := make([]byte, readSize); ; { + n, err := req.Body.Read(buf) + if n > 0 { + s.buf.put(&recvMsg{data: buf[:n:n]}) + buf = buf[n:] + } + if err != nil { + s.buf.put(&recvMsg{err: mapRecvMsgError(err)}) + return + } + if len(buf) == 0 { + buf = make([]byte, readSize) + } + } + }() + + // startStream is provided by the *grpc.Server's serveStreams. + // It starts a goroutine serving s and exits immediately. + // The goroutine that is started is the one that then calls + // into ht, calling WriteHeader, Write, WriteStatus, Close, etc. + startStream(s) + + ht.runStream() + close(requestOver) + + // Wait for reading goroutine to finish. + req.Body.Close() + <-readerDone +} + +func (ht *serverHandlerTransport) runStream() { + for { + select { + case fn, ok := <-ht.writes: + if !ok { + return + } + fn() + case <-ht.closedCh: + return + } + } +} + +func (ht *serverHandlerTransport) Drain() { + panic("Drain() is not implemented") +} + +// mapRecvMsgError returns the non-nil err into the appropriate +// error value as expected by callers of *grpc.parser.recvMsg. +// In particular, in can only be: +// * io.EOF +// * io.ErrUnexpectedEOF +// * of type transport.ConnectionError +// * of type transport.StreamError +func mapRecvMsgError(err error) error { + if err == io.EOF || err == io.ErrUnexpectedEOF { + return err + } + if se, ok := err.(http2.StreamError); ok { + if code, ok := http2ErrConvTab[se.Code]; ok { + return StreamError{ + Code: code, + Desc: se.Error(), + } + } + } + return connectionErrorf(true, err, err.Error()) +} diff --git a/vendor/google.golang.org/grpc/transport/http2_client.go b/vendor/google.golang.org/grpc/transport/http2_client.go new file mode 100644 index 0000000..892f8ba --- /dev/null +++ b/vendor/google.golang.org/grpc/transport/http2_client.go @@ -0,0 +1,1129 @@ +/* + * + * Copyright 2014, Google Inc. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are + * met: + * + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following disclaimer + * in the documentation and/or other materials provided with the + * distribution. + * * Neither the name of Google Inc. nor the names of its + * contributors may be used to endorse or promote products derived from + * this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT + * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * + */ + +package transport + +import ( + "bytes" + "fmt" + "io" + "math" + "net" + "strings" + "sync" + "time" + + "golang.org/x/net/context" + "golang.org/x/net/http2" + "golang.org/x/net/http2/hpack" + "google.golang.org/grpc/codes" + "google.golang.org/grpc/credentials" + "google.golang.org/grpc/grpclog" + "google.golang.org/grpc/metadata" + "google.golang.org/grpc/peer" + "google.golang.org/grpc/stats" +) + +// http2Client implements the ClientTransport interface with HTTP2. +type http2Client struct { + ctx context.Context + target string // server name/addr + userAgent string + md interface{} + conn net.Conn // underlying communication channel + remoteAddr net.Addr + localAddr net.Addr + authInfo credentials.AuthInfo // auth info about the connection + nextID uint32 // the next stream ID to be used + + // writableChan synchronizes write access to the transport. + // A writer acquires the write lock by sending a value on writableChan + // and releases it by receiving from writableChan. + writableChan chan int + // shutdownChan is closed when Close is called. + // Blocking operations should select on shutdownChan to avoid + // blocking forever after Close. + // TODO(zhaoq): Maybe have a channel context? + shutdownChan chan struct{} + // errorChan is closed to notify the I/O error to the caller. + errorChan chan struct{} + // goAway is closed to notify the upper layer (i.e., addrConn.transportMonitor) + // that the server sent GoAway on this transport. + goAway chan struct{} + + framer *framer + hBuf *bytes.Buffer // the buffer for HPACK encoding + hEnc *hpack.Encoder // HPACK encoder + + // controlBuf delivers all the control related tasks (e.g., window + // updates, reset streams, and various settings) to the controller. + controlBuf *recvBuffer + fc *inFlow + // sendQuotaPool provides flow control to outbound message. + sendQuotaPool *quotaPool + // streamsQuota limits the max number of concurrent streams. + streamsQuota *quotaPool + + // The scheme used: https if TLS is on, http otherwise. + scheme string + + creds []credentials.PerRPCCredentials + + statsHandler stats.Handler + + mu sync.Mutex // guard the following variables + state transportState // the state of underlying connection + activeStreams map[uint32]*Stream + // The max number of concurrent streams + maxStreams int + // the per-stream outbound flow control window size set by the peer. + streamSendQuota uint32 + // goAwayID records the Last-Stream-ID in the GoAway frame from the server. + goAwayID uint32 + // prevGoAway ID records the Last-Stream-ID in the previous GOAway frame. + prevGoAwayID uint32 +} + +func dial(ctx context.Context, fn func(context.Context, string) (net.Conn, error), addr string) (net.Conn, error) { + if fn != nil { + return fn(ctx, addr) + } + return dialContext(ctx, "tcp", addr) +} + +func isTemporary(err error) bool { + switch err { + case io.EOF: + // Connection closures may be resolved upon retry, and are thus + // treated as temporary. + return true + case context.DeadlineExceeded: + // In Go 1.7, context.DeadlineExceeded implements Timeout(), and this + // special case is not needed. Until then, we need to keep this + // clause. + return true + } + + switch err := err.(type) { + case interface { + Temporary() bool + }: + return err.Temporary() + case interface { + Timeout() bool + }: + // Timeouts may be resolved upon retry, and are thus treated as + // temporary. + return err.Timeout() + } + return false +} + +// newHTTP2Client constructs a connected ClientTransport to addr based on HTTP2 +// and starts to receive messages on it. Non-nil error returns if construction +// fails. +func newHTTP2Client(ctx context.Context, addr TargetInfo, opts ConnectOptions) (_ ClientTransport, err error) { + scheme := "http" + conn, err := dial(ctx, opts.Dialer, addr.Addr) + if err != nil { + if opts.FailOnNonTempDialError { + return nil, connectionErrorf(isTemporary(err), err, "transport: %v", err) + } + return nil, connectionErrorf(true, err, "transport: %v", err) + } + // Any further errors will close the underlying connection + defer func(conn net.Conn) { + if err != nil { + conn.Close() + } + }(conn) + var authInfo credentials.AuthInfo + if creds := opts.TransportCredentials; creds != nil { + scheme = "https" + conn, authInfo, err = creds.ClientHandshake(ctx, addr.Addr, conn) + if err != nil { + // Credentials handshake errors are typically considered permanent + // to avoid retrying on e.g. bad certificates. + temp := isTemporary(err) + return nil, connectionErrorf(temp, err, "transport: %v", err) + } + } + ua := primaryUA + if opts.UserAgent != "" { + ua = opts.UserAgent + " " + ua + } + var buf bytes.Buffer + t := &http2Client{ + ctx: ctx, + target: addr.Addr, + userAgent: ua, + md: addr.Metadata, + conn: conn, + remoteAddr: conn.RemoteAddr(), + localAddr: conn.LocalAddr(), + authInfo: authInfo, + // The client initiated stream id is odd starting from 1. + nextID: 1, + writableChan: make(chan int, 1), + shutdownChan: make(chan struct{}), + errorChan: make(chan struct{}), + goAway: make(chan struct{}), + framer: newFramer(conn), + hBuf: &buf, + hEnc: hpack.NewEncoder(&buf), + controlBuf: newRecvBuffer(), + fc: &inFlow{limit: initialConnWindowSize}, + sendQuotaPool: newQuotaPool(defaultWindowSize), + scheme: scheme, + state: reachable, + activeStreams: make(map[uint32]*Stream), + creds: opts.PerRPCCredentials, + maxStreams: math.MaxInt32, + streamSendQuota: defaultWindowSize, + statsHandler: opts.StatsHandler, + } + if t.statsHandler != nil { + t.ctx = t.statsHandler.TagConn(t.ctx, &stats.ConnTagInfo{ + RemoteAddr: t.remoteAddr, + LocalAddr: t.localAddr, + }) + connBegin := &stats.ConnBegin{ + Client: true, + } + t.statsHandler.HandleConn(t.ctx, connBegin) + } + // Start the reader goroutine for incoming message. Each transport has + // a dedicated goroutine which reads HTTP2 frame from network. Then it + // dispatches the frame to the corresponding stream entity. + go t.reader() + // Send connection preface to server. + n, err := t.conn.Write(clientPreface) + if err != nil { + t.Close() + return nil, connectionErrorf(true, err, "transport: %v", err) + } + if n != len(clientPreface) { + t.Close() + return nil, connectionErrorf(true, err, "transport: preface mismatch, wrote %d bytes; want %d", n, len(clientPreface)) + } + if initialWindowSize != defaultWindowSize { + err = t.framer.writeSettings(true, http2.Setting{ + ID: http2.SettingInitialWindowSize, + Val: uint32(initialWindowSize), + }) + } else { + err = t.framer.writeSettings(true) + } + if err != nil { + t.Close() + return nil, connectionErrorf(true, err, "transport: %v", err) + } + // Adjust the connection flow control window if needed. + if delta := uint32(initialConnWindowSize - defaultWindowSize); delta > 0 { + if err := t.framer.writeWindowUpdate(true, 0, delta); err != nil { + t.Close() + return nil, connectionErrorf(true, err, "transport: %v", err) + } + } + go t.controller() + t.writableChan <- 0 + return t, nil +} + +func (t *http2Client) newStream(ctx context.Context, callHdr *CallHdr) *Stream { + // TODO(zhaoq): Handle uint32 overflow of Stream.id. + s := &Stream{ + id: t.nextID, + done: make(chan struct{}), + goAway: make(chan struct{}), + method: callHdr.Method, + sendCompress: callHdr.SendCompress, + buf: newRecvBuffer(), + fc: &inFlow{limit: initialWindowSize}, + sendQuotaPool: newQuotaPool(int(t.streamSendQuota)), + headerChan: make(chan struct{}), + } + t.nextID += 2 + s.windowHandler = func(n int) { + t.updateWindow(s, uint32(n)) + } + // The client side stream context should have exactly the same life cycle with the user provided context. + // That means, s.ctx should be read-only. And s.ctx is done iff ctx is done. + // So we use the original context here instead of creating a copy. + s.ctx = ctx + s.dec = &recvBufferReader{ + ctx: s.ctx, + goAway: s.goAway, + recv: s.buf, + } + return s +} + +// NewStream creates a stream and register it into the transport as "active" +// streams. +func (t *http2Client) NewStream(ctx context.Context, callHdr *CallHdr) (_ *Stream, err error) { + pr := &peer.Peer{ + Addr: t.remoteAddr, + } + // Attach Auth info if there is any. + if t.authInfo != nil { + pr.AuthInfo = t.authInfo + } + userCtx := ctx + ctx = peer.NewContext(ctx, pr) + authData := make(map[string]string) + for _, c := range t.creds { + // Construct URI required to get auth request metadata. + var port string + if pos := strings.LastIndex(t.target, ":"); pos != -1 { + // Omit port if it is the default one. + if t.target[pos+1:] != "443" { + port = ":" + t.target[pos+1:] + } + } + pos := strings.LastIndex(callHdr.Method, "/") + if pos == -1 { + return nil, streamErrorf(codes.InvalidArgument, "transport: malformed method name: %q", callHdr.Method) + } + audience := "https://" + callHdr.Host + port + callHdr.Method[:pos] + data, err := c.GetRequestMetadata(ctx, audience) + if err != nil { + return nil, streamErrorf(codes.InvalidArgument, "transport: %v", err) + } + for k, v := range data { + authData[k] = v + } + } + t.mu.Lock() + if t.activeStreams == nil { + t.mu.Unlock() + return nil, ErrConnClosing + } + if t.state == draining { + t.mu.Unlock() + return nil, ErrStreamDrain + } + if t.state != reachable { + t.mu.Unlock() + return nil, ErrConnClosing + } + checkStreamsQuota := t.streamsQuota != nil + t.mu.Unlock() + if checkStreamsQuota { + sq, err := wait(ctx, nil, nil, t.shutdownChan, t.streamsQuota.acquire()) + if err != nil { + return nil, err + } + // Returns the quota balance back. + if sq > 1 { + t.streamsQuota.add(sq - 1) + } + } + if _, err := wait(ctx, nil, nil, t.shutdownChan, t.writableChan); err != nil { + // Return the quota back now because there is no stream returned to the caller. + if _, ok := err.(StreamError); ok && checkStreamsQuota { + t.streamsQuota.add(1) + } + return nil, err + } + t.mu.Lock() + if t.state == draining { + t.mu.Unlock() + if checkStreamsQuota { + t.streamsQuota.add(1) + } + // Need to make t writable again so that the rpc in flight can still proceed. + t.writableChan <- 0 + return nil, ErrStreamDrain + } + if t.state != reachable { + t.mu.Unlock() + return nil, ErrConnClosing + } + s := t.newStream(ctx, callHdr) + s.clientStatsCtx = userCtx + t.activeStreams[s.id] = s + + // This stream is not counted when applySetings(...) initialize t.streamsQuota. + // Reset t.streamsQuota to the right value. + var reset bool + if !checkStreamsQuota && t.streamsQuota != nil { + reset = true + } + t.mu.Unlock() + if reset { + t.streamsQuota.add(-1) + } + + // HPACK encodes various headers. Note that once WriteField(...) is + // called, the corresponding headers/continuation frame has to be sent + // because hpack.Encoder is stateful. + t.hBuf.Reset() + t.hEnc.WriteField(hpack.HeaderField{Name: ":method", Value: "POST"}) + t.hEnc.WriteField(hpack.HeaderField{Name: ":scheme", Value: t.scheme}) + t.hEnc.WriteField(hpack.HeaderField{Name: ":path", Value: callHdr.Method}) + t.hEnc.WriteField(hpack.HeaderField{Name: ":authority", Value: callHdr.Host}) + t.hEnc.WriteField(hpack.HeaderField{Name: "content-type", Value: "application/grpc"}) + t.hEnc.WriteField(hpack.HeaderField{Name: "user-agent", Value: t.userAgent}) + t.hEnc.WriteField(hpack.HeaderField{Name: "te", Value: "trailers"}) + + if callHdr.SendCompress != "" { + t.hEnc.WriteField(hpack.HeaderField{Name: "grpc-encoding", Value: callHdr.SendCompress}) + } + if dl, ok := ctx.Deadline(); ok { + // Send out timeout regardless its value. The server can detect timeout context by itself. + timeout := dl.Sub(time.Now()) + t.hEnc.WriteField(hpack.HeaderField{Name: "grpc-timeout", Value: encodeTimeout(timeout)}) + } + + for k, v := range authData { + // Capital header names are illegal in HTTP/2. + k = strings.ToLower(k) + t.hEnc.WriteField(hpack.HeaderField{Name: k, Value: v}) + } + var ( + hasMD bool + endHeaders bool + ) + if md, ok := metadata.FromContext(ctx); ok { + hasMD = true + for k, v := range md { + // HTTP doesn't allow you to set pseudoheaders after non pseudoheaders were set. + if isReservedHeader(k) { + continue + } + for _, entry := range v { + t.hEnc.WriteField(hpack.HeaderField{Name: k, Value: entry}) + } + } + } + if md, ok := t.md.(*metadata.MD); ok { + for k, v := range *md { + if isReservedHeader(k) { + continue + } + for _, entry := range v { + t.hEnc.WriteField(hpack.HeaderField{Name: k, Value: entry}) + } + } + } + first := true + bufLen := t.hBuf.Len() + // Sends the headers in a single batch even when they span multiple frames. + for !endHeaders { + size := t.hBuf.Len() + if size > http2MaxFrameLen { + size = http2MaxFrameLen + } else { + endHeaders = true + } + var flush bool + if endHeaders && (hasMD || callHdr.Flush) { + flush = true + } + if first { + // Sends a HeadersFrame to server to start a new stream. + p := http2.HeadersFrameParam{ + StreamID: s.id, + BlockFragment: t.hBuf.Next(size), + EndStream: false, + EndHeaders: endHeaders, + } + // Do a force flush for the buffered frames iff it is the last headers frame + // and there is header metadata to be sent. Otherwise, there is flushing until + // the corresponding data frame is written. + err = t.framer.writeHeaders(flush, p) + first = false + } else { + // Sends Continuation frames for the leftover headers. + err = t.framer.writeContinuation(flush, s.id, endHeaders, t.hBuf.Next(size)) + } + if err != nil { + t.notifyError(err) + return nil, connectionErrorf(true, err, "transport: %v", err) + } + } + if t.statsHandler != nil { + outHeader := &stats.OutHeader{ + Client: true, + WireLength: bufLen, + FullMethod: callHdr.Method, + RemoteAddr: t.remoteAddr, + LocalAddr: t.localAddr, + Compression: callHdr.SendCompress, + } + t.statsHandler.HandleRPC(s.clientStatsCtx, outHeader) + } + t.writableChan <- 0 + return s, nil +} + +// CloseStream clears the footprint of a stream when the stream is not needed any more. +// This must not be executed in reader's goroutine. +func (t *http2Client) CloseStream(s *Stream, err error) { + var updateStreams bool + t.mu.Lock() + if t.activeStreams == nil { + t.mu.Unlock() + return + } + if t.streamsQuota != nil { + updateStreams = true + } + delete(t.activeStreams, s.id) + if t.state == draining && len(t.activeStreams) == 0 { + // The transport is draining and s is the last live stream on t. + t.mu.Unlock() + t.Close() + return + } + t.mu.Unlock() + if updateStreams { + t.streamsQuota.add(1) + } + s.mu.Lock() + if q := s.fc.resetPendingData(); q > 0 { + if n := t.fc.onRead(q); n > 0 { + t.controlBuf.put(&windowUpdate{0, n}) + } + } + if s.state == streamDone { + s.mu.Unlock() + return + } + if !s.headerDone { + close(s.headerChan) + s.headerDone = true + } + s.state = streamDone + s.mu.Unlock() + if se, ok := err.(StreamError); ok && se.Code != codes.DeadlineExceeded { + t.controlBuf.put(&resetStream{s.id, http2.ErrCodeCancel}) + } +} + +// Close kicks off the shutdown process of the transport. This should be called +// only once on a transport. Once it is called, the transport should not be +// accessed any more. +func (t *http2Client) Close() (err error) { + t.mu.Lock() + if t.state == closing { + t.mu.Unlock() + return + } + if t.state == reachable || t.state == draining { + close(t.errorChan) + } + t.state = closing + t.mu.Unlock() + close(t.shutdownChan) + err = t.conn.Close() + t.mu.Lock() + streams := t.activeStreams + t.activeStreams = nil + t.mu.Unlock() + // Notify all active streams. + for _, s := range streams { + s.mu.Lock() + if !s.headerDone { + close(s.headerChan) + s.headerDone = true + } + s.mu.Unlock() + s.write(recvMsg{err: ErrConnClosing}) + } + if t.statsHandler != nil { + connEnd := &stats.ConnEnd{ + Client: true, + } + t.statsHandler.HandleConn(t.ctx, connEnd) + } + return +} + +func (t *http2Client) GracefulClose() error { + t.mu.Lock() + switch t.state { + case unreachable: + // The server may close the connection concurrently. t is not available for + // any streams. Close it now. + t.mu.Unlock() + t.Close() + return nil + case closing: + t.mu.Unlock() + return nil + } + // Notify the streams which were initiated after the server sent GOAWAY. + select { + case <-t.goAway: + n := t.prevGoAwayID + if n == 0 && t.nextID > 1 { + n = t.nextID - 2 + } + m := t.goAwayID + 2 + if m == 2 { + m = 1 + } + for i := m; i <= n; i += 2 { + if s, ok := t.activeStreams[i]; ok { + close(s.goAway) + } + } + default: + } + if t.state == draining { + t.mu.Unlock() + return nil + } + t.state = draining + active := len(t.activeStreams) + t.mu.Unlock() + if active == 0 { + return t.Close() + } + return nil +} + +// Write formats the data into HTTP2 data frame(s) and sends it out. The caller +// should proceed only if Write returns nil. +// TODO(zhaoq): opts.Delay is ignored in this implementation. Support it later +// if it improves the performance. +func (t *http2Client) Write(s *Stream, data []byte, opts *Options) error { + r := bytes.NewBuffer(data) + for { + var p []byte + if r.Len() > 0 { + size := http2MaxFrameLen + // Wait until the stream has some quota to send the data. + sq, err := wait(s.ctx, s.done, s.goAway, t.shutdownChan, s.sendQuotaPool.acquire()) + if err != nil { + return err + } + // Wait until the transport has some quota to send the data. + tq, err := wait(s.ctx, s.done, s.goAway, t.shutdownChan, t.sendQuotaPool.acquire()) + if err != nil { + return err + } + if sq < size { + size = sq + } + if tq < size { + size = tq + } + p = r.Next(size) + ps := len(p) + if ps < sq { + // Overbooked stream quota. Return it back. + s.sendQuotaPool.add(sq - ps) + } + if ps < tq { + // Overbooked transport quota. Return it back. + t.sendQuotaPool.add(tq - ps) + } + } + var ( + endStream bool + forceFlush bool + ) + if opts.Last && r.Len() == 0 { + endStream = true + } + // Indicate there is a writer who is about to write a data frame. + t.framer.adjustNumWriters(1) + // Got some quota. Try to acquire writing privilege on the transport. + if _, err := wait(s.ctx, s.done, s.goAway, t.shutdownChan, t.writableChan); err != nil { + if _, ok := err.(StreamError); ok || err == io.EOF { + // Return the connection quota back. + t.sendQuotaPool.add(len(p)) + } + if t.framer.adjustNumWriters(-1) == 0 { + // This writer is the last one in this batch and has the + // responsibility to flush the buffered frames. It queues + // a flush request to controlBuf instead of flushing directly + // in order to avoid the race with other writing or flushing. + t.controlBuf.put(&flushIO{}) + } + return err + } + select { + case <-s.ctx.Done(): + t.sendQuotaPool.add(len(p)) + if t.framer.adjustNumWriters(-1) == 0 { + t.controlBuf.put(&flushIO{}) + } + t.writableChan <- 0 + return ContextErr(s.ctx.Err()) + default: + } + if r.Len() == 0 && t.framer.adjustNumWriters(0) == 1 { + // Do a force flush iff this is last frame for the entire gRPC message + // and the caller is the only writer at this moment. + forceFlush = true + } + // If WriteData fails, all the pending streams will be handled + // by http2Client.Close(). No explicit CloseStream() needs to be + // invoked. + if err := t.framer.writeData(forceFlush, s.id, endStream, p); err != nil { + t.notifyError(err) + return connectionErrorf(true, err, "transport: %v", err) + } + if t.framer.adjustNumWriters(-1) == 0 { + t.framer.flushWrite() + } + t.writableChan <- 0 + if r.Len() == 0 { + break + } + } + if !opts.Last { + return nil + } + s.mu.Lock() + if s.state != streamDone { + s.state = streamWriteDone + } + s.mu.Unlock() + return nil +} + +func (t *http2Client) getStream(f http2.Frame) (*Stream, bool) { + t.mu.Lock() + defer t.mu.Unlock() + s, ok := t.activeStreams[f.Header().StreamID] + return s, ok +} + +// updateWindow adjusts the inbound quota for the stream and the transport. +// Window updates will deliver to the controller for sending when +// the cumulative quota exceeds the corresponding threshold. +func (t *http2Client) updateWindow(s *Stream, n uint32) { + s.mu.Lock() + defer s.mu.Unlock() + if s.state == streamDone { + return + } + if w := t.fc.onRead(n); w > 0 { + t.controlBuf.put(&windowUpdate{0, w}) + } + if w := s.fc.onRead(n); w > 0 { + t.controlBuf.put(&windowUpdate{s.id, w}) + } +} + +func (t *http2Client) handleData(f *http2.DataFrame) { + size := len(f.Data()) + if err := t.fc.onData(uint32(size)); err != nil { + t.notifyError(connectionErrorf(true, err, "%v", err)) + return + } + // Select the right stream to dispatch. + s, ok := t.getStream(f) + if !ok { + if w := t.fc.onRead(uint32(size)); w > 0 { + t.controlBuf.put(&windowUpdate{0, w}) + } + return + } + if size > 0 { + s.mu.Lock() + if s.state == streamDone { + s.mu.Unlock() + // The stream has been closed. Release the corresponding quota. + if w := t.fc.onRead(uint32(size)); w > 0 { + t.controlBuf.put(&windowUpdate{0, w}) + } + return + } + if err := s.fc.onData(uint32(size)); err != nil { + s.state = streamDone + s.statusCode = codes.Internal + s.statusDesc = err.Error() + close(s.done) + s.mu.Unlock() + s.write(recvMsg{err: io.EOF}) + t.controlBuf.put(&resetStream{s.id, http2.ErrCodeFlowControl}) + return + } + s.mu.Unlock() + // TODO(bradfitz, zhaoq): A copy is required here because there is no + // guarantee f.Data() is consumed before the arrival of next frame. + // Can this copy be eliminated? + data := make([]byte, size) + copy(data, f.Data()) + s.write(recvMsg{data: data}) + } + // The server has closed the stream without sending trailers. Record that + // the read direction is closed, and set the status appropriately. + if f.FrameHeader.Flags.Has(http2.FlagDataEndStream) { + s.mu.Lock() + if s.state == streamDone { + s.mu.Unlock() + return + } + s.state = streamDone + s.statusCode = codes.Internal + s.statusDesc = "server closed the stream without sending trailers" + close(s.done) + s.mu.Unlock() + s.write(recvMsg{err: io.EOF}) + } +} + +func (t *http2Client) handleRSTStream(f *http2.RSTStreamFrame) { + s, ok := t.getStream(f) + if !ok { + return + } + s.mu.Lock() + if s.state == streamDone { + s.mu.Unlock() + return + } + s.state = streamDone + if !s.headerDone { + close(s.headerChan) + s.headerDone = true + } + s.statusCode, ok = http2ErrConvTab[http2.ErrCode(f.ErrCode)] + if !ok { + grpclog.Println("transport: http2Client.handleRSTStream found no mapped gRPC status for the received http2 error ", f.ErrCode) + s.statusCode = codes.Unknown + } + s.statusDesc = fmt.Sprintf("stream terminated by RST_STREAM with error code: %d", f.ErrCode) + close(s.done) + s.mu.Unlock() + s.write(recvMsg{err: io.EOF}) +} + +func (t *http2Client) handleSettings(f *http2.SettingsFrame) { + if f.IsAck() { + return + } + var ss []http2.Setting + f.ForeachSetting(func(s http2.Setting) error { + ss = append(ss, s) + return nil + }) + // The settings will be applied once the ack is sent. + t.controlBuf.put(&settings{ack: true, ss: ss}) +} + +func (t *http2Client) handlePing(f *http2.PingFrame) { + if f.IsAck() { // Do nothing. + return + } + pingAck := &ping{ack: true} + copy(pingAck.data[:], f.Data[:]) + t.controlBuf.put(pingAck) +} + +func (t *http2Client) handleGoAway(f *http2.GoAwayFrame) { + t.mu.Lock() + if t.state == reachable || t.state == draining { + if f.LastStreamID > 0 && f.LastStreamID%2 != 1 { + t.mu.Unlock() + t.notifyError(connectionErrorf(true, nil, "received illegal http2 GOAWAY frame: stream ID %d is even", f.LastStreamID)) + return + } + select { + case <-t.goAway: + id := t.goAwayID + // t.goAway has been closed (i.e.,multiple GoAways). + if id < f.LastStreamID { + t.mu.Unlock() + t.notifyError(connectionErrorf(true, nil, "received illegal http2 GOAWAY frame: previously recv GOAWAY frame with LastStramID %d, currently recv %d", id, f.LastStreamID)) + return + } + t.prevGoAwayID = id + t.goAwayID = f.LastStreamID + t.mu.Unlock() + return + default: + } + t.goAwayID = f.LastStreamID + close(t.goAway) + } + t.mu.Unlock() +} + +func (t *http2Client) handleWindowUpdate(f *http2.WindowUpdateFrame) { + id := f.Header().StreamID + incr := f.Increment + if id == 0 { + t.sendQuotaPool.add(int(incr)) + return + } + if s, ok := t.getStream(f); ok { + s.sendQuotaPool.add(int(incr)) + } +} + +// operateHeaders takes action on the decoded headers. +func (t *http2Client) operateHeaders(frame *http2.MetaHeadersFrame) { + s, ok := t.getStream(frame) + if !ok { + return + } + var state decodeState + for _, hf := range frame.Fields { + state.processHeaderField(hf) + } + if state.err != nil { + s.mu.Lock() + if !s.headerDone { + close(s.headerChan) + s.headerDone = true + } + s.mu.Unlock() + s.write(recvMsg{err: state.err}) + // Something wrong. Stops reading even when there is remaining. + return + } + + endStream := frame.StreamEnded() + var isHeader bool + defer func() { + if t.statsHandler != nil { + if isHeader { + inHeader := &stats.InHeader{ + Client: true, + WireLength: int(frame.Header().Length), + } + t.statsHandler.HandleRPC(s.clientStatsCtx, inHeader) + } else { + inTrailer := &stats.InTrailer{ + Client: true, + WireLength: int(frame.Header().Length), + } + t.statsHandler.HandleRPC(s.clientStatsCtx, inTrailer) + } + } + }() + + s.mu.Lock() + if !endStream { + s.recvCompress = state.encoding + } + if !s.headerDone { + if !endStream && len(state.mdata) > 0 { + s.header = state.mdata + } + close(s.headerChan) + s.headerDone = true + isHeader = true + } + if !endStream || s.state == streamDone { + s.mu.Unlock() + return + } + + if len(state.mdata) > 0 { + s.trailer = state.mdata + } + s.statusCode = state.statusCode + s.statusDesc = state.statusDesc + close(s.done) + s.state = streamDone + s.mu.Unlock() + s.write(recvMsg{err: io.EOF}) +} + +func handleMalformedHTTP2(s *Stream, err error) { + s.mu.Lock() + if !s.headerDone { + close(s.headerChan) + s.headerDone = true + } + s.mu.Unlock() + s.write(recvMsg{err: err}) +} + +// reader runs as a separate goroutine in charge of reading data from network +// connection. +// +// TODO(zhaoq): currently one reader per transport. Investigate whether this is +// optimal. +// TODO(zhaoq): Check the validity of the incoming frame sequence. +func (t *http2Client) reader() { + // Check the validity of server preface. + frame, err := t.framer.readFrame() + if err != nil { + t.notifyError(err) + return + } + sf, ok := frame.(*http2.SettingsFrame) + if !ok { + t.notifyError(err) + return + } + t.handleSettings(sf) + + // loop to keep reading incoming messages on this transport. + for { + frame, err := t.framer.readFrame() + if err != nil { + // Abort an active stream if the http2.Framer returns a + // http2.StreamError. This can happen only if the server's response + // is malformed http2. + if se, ok := err.(http2.StreamError); ok { + t.mu.Lock() + s := t.activeStreams[se.StreamID] + t.mu.Unlock() + if s != nil { + // use error detail to provide better err message + handleMalformedHTTP2(s, streamErrorf(http2ErrConvTab[se.Code], "%v", t.framer.errorDetail())) + } + continue + } else { + // Transport error. + t.notifyError(err) + return + } + } + switch frame := frame.(type) { + case *http2.MetaHeadersFrame: + t.operateHeaders(frame) + case *http2.DataFrame: + t.handleData(frame) + case *http2.RSTStreamFrame: + t.handleRSTStream(frame) + case *http2.SettingsFrame: + t.handleSettings(frame) + case *http2.PingFrame: + t.handlePing(frame) + case *http2.GoAwayFrame: + t.handleGoAway(frame) + case *http2.WindowUpdateFrame: + t.handleWindowUpdate(frame) + default: + grpclog.Printf("transport: http2Client.reader got unhandled frame type %v.", frame) + } + } +} + +func (t *http2Client) applySettings(ss []http2.Setting) { + for _, s := range ss { + switch s.ID { + case http2.SettingMaxConcurrentStreams: + // TODO(zhaoq): This is a hack to avoid significant refactoring of the + // code to deal with the unrealistic int32 overflow. Probably will try + // to find a better way to handle this later. + if s.Val > math.MaxInt32 { + s.Val = math.MaxInt32 + } + t.mu.Lock() + reset := t.streamsQuota != nil + if !reset { + t.streamsQuota = newQuotaPool(int(s.Val) - len(t.activeStreams)) + } + ms := t.maxStreams + t.maxStreams = int(s.Val) + t.mu.Unlock() + if reset { + t.streamsQuota.add(int(s.Val) - ms) + } + case http2.SettingInitialWindowSize: + t.mu.Lock() + for _, stream := range t.activeStreams { + // Adjust the sending quota for each stream. + stream.sendQuotaPool.add(int(s.Val - t.streamSendQuota)) + } + t.streamSendQuota = s.Val + t.mu.Unlock() + } + } +} + +// controller running in a separate goroutine takes charge of sending control +// frames (e.g., window update, reset stream, setting, etc.) to the server. +func (t *http2Client) controller() { + for { + select { + case i := <-t.controlBuf.get(): + t.controlBuf.load() + select { + case <-t.writableChan: + switch i := i.(type) { + case *windowUpdate: + t.framer.writeWindowUpdate(true, i.streamID, i.increment) + case *settings: + if i.ack { + t.framer.writeSettingsAck(true) + t.applySettings(i.ss) + } else { + t.framer.writeSettings(true, i.ss...) + } + case *resetStream: + t.framer.writeRSTStream(true, i.streamID, i.code) + case *flushIO: + t.framer.flushWrite() + case *ping: + t.framer.writePing(true, i.ack, i.data) + default: + grpclog.Printf("transport: http2Client.controller got unexpected item type %v\n", i) + } + t.writableChan <- 0 + continue + case <-t.shutdownChan: + return + } + case <-t.shutdownChan: + return + } + } +} + +func (t *http2Client) Error() <-chan struct{} { + return t.errorChan +} + +func (t *http2Client) GoAway() <-chan struct{} { + return t.goAway +} + +func (t *http2Client) notifyError(err error) { + t.mu.Lock() + // make sure t.errorChan is closed only once. + if t.state == draining { + t.mu.Unlock() + t.Close() + return + } + if t.state == reachable { + t.state = unreachable + close(t.errorChan) + grpclog.Printf("transport: http2Client.notifyError got notified that the client transport was broken %v.", err) + } + t.mu.Unlock() +} diff --git a/vendor/google.golang.org/grpc/transport/http2_server.go b/vendor/google.golang.org/grpc/transport/http2_server.go new file mode 100644 index 0000000..a095dd0 --- /dev/null +++ b/vendor/google.golang.org/grpc/transport/http2_server.go @@ -0,0 +1,835 @@ +/* + * + * Copyright 2014, Google Inc. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are + * met: + * + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following disclaimer + * in the documentation and/or other materials provided with the + * distribution. + * * Neither the name of Google Inc. nor the names of its + * contributors may be used to endorse or promote products derived from + * this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT + * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * + */ + +package transport + +import ( + "bytes" + "errors" + "io" + "math" + "net" + "strconv" + "sync" + + "golang.org/x/net/context" + "golang.org/x/net/http2" + "golang.org/x/net/http2/hpack" + "google.golang.org/grpc/codes" + "google.golang.org/grpc/credentials" + "google.golang.org/grpc/grpclog" + "google.golang.org/grpc/metadata" + "google.golang.org/grpc/peer" + "google.golang.org/grpc/stats" + "google.golang.org/grpc/tap" +) + +// ErrIllegalHeaderWrite indicates that setting header is illegal because of +// the stream's state. +var ErrIllegalHeaderWrite = errors.New("transport: the stream is done or WriteHeader was already called") + +// http2Server implements the ServerTransport interface with HTTP2. +type http2Server struct { + ctx context.Context + conn net.Conn + remoteAddr net.Addr + localAddr net.Addr + maxStreamID uint32 // max stream ID ever seen + authInfo credentials.AuthInfo // auth info about the connection + inTapHandle tap.ServerInHandle + // writableChan synchronizes write access to the transport. + // A writer acquires the write lock by receiving a value on writableChan + // and releases it by sending on writableChan. + writableChan chan int + // shutdownChan is closed when Close is called. + // Blocking operations should select on shutdownChan to avoid + // blocking forever after Close. + shutdownChan chan struct{} + framer *framer + hBuf *bytes.Buffer // the buffer for HPACK encoding + hEnc *hpack.Encoder // HPACK encoder + + // The max number of concurrent streams. + maxStreams uint32 + // controlBuf delivers all the control related tasks (e.g., window + // updates, reset streams, and various settings) to the controller. + controlBuf *recvBuffer + fc *inFlow + // sendQuotaPool provides flow control to outbound message. + sendQuotaPool *quotaPool + + stats stats.Handler + + mu sync.Mutex // guard the following + state transportState + activeStreams map[uint32]*Stream + // the per-stream outbound flow control window size set by the peer. + streamSendQuota uint32 +} + +// newHTTP2Server constructs a ServerTransport based on HTTP2. ConnectionError is +// returned if something goes wrong. +func newHTTP2Server(conn net.Conn, config *ServerConfig) (_ ServerTransport, err error) { + framer := newFramer(conn) + // Send initial settings as connection preface to client. + var settings []http2.Setting + // TODO(zhaoq): Have a better way to signal "no limit" because 0 is + // permitted in the HTTP2 spec. + maxStreams := config.MaxStreams + if maxStreams == 0 { + maxStreams = math.MaxUint32 + } else { + settings = append(settings, http2.Setting{ + ID: http2.SettingMaxConcurrentStreams, + Val: maxStreams, + }) + } + if initialWindowSize != defaultWindowSize { + settings = append(settings, http2.Setting{ + ID: http2.SettingInitialWindowSize, + Val: uint32(initialWindowSize)}) + } + if err := framer.writeSettings(true, settings...); err != nil { + return nil, connectionErrorf(true, err, "transport: %v", err) + } + // Adjust the connection flow control window if needed. + if delta := uint32(initialConnWindowSize - defaultWindowSize); delta > 0 { + if err := framer.writeWindowUpdate(true, 0, delta); err != nil { + return nil, connectionErrorf(true, err, "transport: %v", err) + } + } + var buf bytes.Buffer + t := &http2Server{ + ctx: context.Background(), + conn: conn, + remoteAddr: conn.RemoteAddr(), + localAddr: conn.LocalAddr(), + authInfo: config.AuthInfo, + framer: framer, + hBuf: &buf, + hEnc: hpack.NewEncoder(&buf), + maxStreams: maxStreams, + inTapHandle: config.InTapHandle, + controlBuf: newRecvBuffer(), + fc: &inFlow{limit: initialConnWindowSize}, + sendQuotaPool: newQuotaPool(defaultWindowSize), + state: reachable, + writableChan: make(chan int, 1), + shutdownChan: make(chan struct{}), + activeStreams: make(map[uint32]*Stream), + streamSendQuota: defaultWindowSize, + stats: config.StatsHandler, + } + if t.stats != nil { + t.ctx = t.stats.TagConn(t.ctx, &stats.ConnTagInfo{ + RemoteAddr: t.remoteAddr, + LocalAddr: t.localAddr, + }) + connBegin := &stats.ConnBegin{} + t.stats.HandleConn(t.ctx, connBegin) + } + go t.controller() + t.writableChan <- 0 + return t, nil +} + +// operateHeader takes action on the decoded headers. +func (t *http2Server) operateHeaders(frame *http2.MetaHeadersFrame, handle func(*Stream), traceCtx func(context.Context, string) context.Context) (close bool) { + buf := newRecvBuffer() + s := &Stream{ + id: frame.Header().StreamID, + st: t, + buf: buf, + fc: &inFlow{limit: initialWindowSize}, + } + + var state decodeState + for _, hf := range frame.Fields { + state.processHeaderField(hf) + } + if err := state.err; err != nil { + if se, ok := err.(StreamError); ok { + t.controlBuf.put(&resetStream{s.id, statusCodeConvTab[se.Code]}) + } + return + } + + if frame.StreamEnded() { + // s is just created by the caller. No lock needed. + s.state = streamReadDone + } + s.recvCompress = state.encoding + if state.timeoutSet { + s.ctx, s.cancel = context.WithTimeout(t.ctx, state.timeout) + } else { + s.ctx, s.cancel = context.WithCancel(t.ctx) + } + pr := &peer.Peer{ + Addr: t.remoteAddr, + } + // Attach Auth info if there is any. + if t.authInfo != nil { + pr.AuthInfo = t.authInfo + } + s.ctx = peer.NewContext(s.ctx, pr) + // Cache the current stream to the context so that the server application + // can find out. Required when the server wants to send some metadata + // back to the client (unary call only). + s.ctx = newContextWithStream(s.ctx, s) + // Attach the received metadata to the context. + if len(state.mdata) > 0 { + s.ctx = metadata.NewContext(s.ctx, state.mdata) + } + + s.dec = &recvBufferReader{ + ctx: s.ctx, + recv: s.buf, + } + s.recvCompress = state.encoding + s.method = state.method + if t.inTapHandle != nil { + var err error + info := &tap.Info{ + FullMethodName: state.method, + } + s.ctx, err = t.inTapHandle(s.ctx, info) + if err != nil { + // TODO: Log the real error. + t.controlBuf.put(&resetStream{s.id, http2.ErrCodeRefusedStream}) + return + } + } + t.mu.Lock() + if t.state != reachable { + t.mu.Unlock() + return + } + if uint32(len(t.activeStreams)) >= t.maxStreams { + t.mu.Unlock() + t.controlBuf.put(&resetStream{s.id, http2.ErrCodeRefusedStream}) + return + } + if s.id%2 != 1 || s.id <= t.maxStreamID { + t.mu.Unlock() + // illegal gRPC stream id. + grpclog.Println("transport: http2Server.HandleStreams received an illegal stream id: ", s.id) + return true + } + t.maxStreamID = s.id + s.sendQuotaPool = newQuotaPool(int(t.streamSendQuota)) + t.activeStreams[s.id] = s + t.mu.Unlock() + s.windowHandler = func(n int) { + t.updateWindow(s, uint32(n)) + } + s.ctx = traceCtx(s.ctx, s.method) + if t.stats != nil { + s.ctx = t.stats.TagRPC(s.ctx, &stats.RPCTagInfo{FullMethodName: s.method}) + inHeader := &stats.InHeader{ + FullMethod: s.method, + RemoteAddr: t.remoteAddr, + LocalAddr: t.localAddr, + Compression: s.recvCompress, + WireLength: int(frame.Header().Length), + } + t.stats.HandleRPC(s.ctx, inHeader) + } + handle(s) + return +} + +// HandleStreams receives incoming streams using the given handler. This is +// typically run in a separate goroutine. +// traceCtx attaches trace to ctx and returns the new context. +func (t *http2Server) HandleStreams(handle func(*Stream), traceCtx func(context.Context, string) context.Context) { + // Check the validity of client preface. + preface := make([]byte, len(clientPreface)) + if _, err := io.ReadFull(t.conn, preface); err != nil { + grpclog.Printf("transport: http2Server.HandleStreams failed to receive the preface from client: %v", err) + t.Close() + return + } + if !bytes.Equal(preface, clientPreface) { + grpclog.Printf("transport: http2Server.HandleStreams received bogus greeting from client: %q", preface) + t.Close() + return + } + + frame, err := t.framer.readFrame() + if err == io.EOF || err == io.ErrUnexpectedEOF { + t.Close() + return + } + if err != nil { + grpclog.Printf("transport: http2Server.HandleStreams failed to read frame: %v", err) + t.Close() + return + } + sf, ok := frame.(*http2.SettingsFrame) + if !ok { + grpclog.Printf("transport: http2Server.HandleStreams saw invalid preface type %T from client", frame) + t.Close() + return + } + t.handleSettings(sf) + + for { + frame, err := t.framer.readFrame() + if err != nil { + if se, ok := err.(http2.StreamError); ok { + t.mu.Lock() + s := t.activeStreams[se.StreamID] + t.mu.Unlock() + if s != nil { + t.closeStream(s) + } + t.controlBuf.put(&resetStream{se.StreamID, se.Code}) + continue + } + if err == io.EOF || err == io.ErrUnexpectedEOF { + t.Close() + return + } + grpclog.Printf("transport: http2Server.HandleStreams failed to read frame: %v", err) + t.Close() + return + } + switch frame := frame.(type) { + case *http2.MetaHeadersFrame: + if t.operateHeaders(frame, handle, traceCtx) { + t.Close() + break + } + case *http2.DataFrame: + t.handleData(frame) + case *http2.RSTStreamFrame: + t.handleRSTStream(frame) + case *http2.SettingsFrame: + t.handleSettings(frame) + case *http2.PingFrame: + t.handlePing(frame) + case *http2.WindowUpdateFrame: + t.handleWindowUpdate(frame) + case *http2.GoAwayFrame: + // TODO: Handle GoAway from the client appropriately. + default: + grpclog.Printf("transport: http2Server.HandleStreams found unhandled frame type %v.", frame) + } + } +} + +func (t *http2Server) getStream(f http2.Frame) (*Stream, bool) { + t.mu.Lock() + defer t.mu.Unlock() + if t.activeStreams == nil { + // The transport is closing. + return nil, false + } + s, ok := t.activeStreams[f.Header().StreamID] + if !ok { + // The stream is already done. + return nil, false + } + return s, true +} + +// updateWindow adjusts the inbound quota for the stream and the transport. +// Window updates will deliver to the controller for sending when +// the cumulative quota exceeds the corresponding threshold. +func (t *http2Server) updateWindow(s *Stream, n uint32) { + s.mu.Lock() + defer s.mu.Unlock() + if s.state == streamDone { + return + } + if w := t.fc.onRead(n); w > 0 { + t.controlBuf.put(&windowUpdate{0, w}) + } + if w := s.fc.onRead(n); w > 0 { + t.controlBuf.put(&windowUpdate{s.id, w}) + } +} + +func (t *http2Server) handleData(f *http2.DataFrame) { + size := len(f.Data()) + if err := t.fc.onData(uint32(size)); err != nil { + grpclog.Printf("transport: http2Server %v", err) + t.Close() + return + } + // Select the right stream to dispatch. + s, ok := t.getStream(f) + if !ok { + if w := t.fc.onRead(uint32(size)); w > 0 { + t.controlBuf.put(&windowUpdate{0, w}) + } + return + } + if size > 0 { + s.mu.Lock() + if s.state == streamDone { + s.mu.Unlock() + // The stream has been closed. Release the corresponding quota. + if w := t.fc.onRead(uint32(size)); w > 0 { + t.controlBuf.put(&windowUpdate{0, w}) + } + return + } + if err := s.fc.onData(uint32(size)); err != nil { + s.mu.Unlock() + t.closeStream(s) + t.controlBuf.put(&resetStream{s.id, http2.ErrCodeFlowControl}) + return + } + s.mu.Unlock() + // TODO(bradfitz, zhaoq): A copy is required here because there is no + // guarantee f.Data() is consumed before the arrival of next frame. + // Can this copy be eliminated? + data := make([]byte, size) + copy(data, f.Data()) + s.write(recvMsg{data: data}) + } + if f.Header().Flags.Has(http2.FlagDataEndStream) { + // Received the end of stream from the client. + s.mu.Lock() + if s.state != streamDone { + s.state = streamReadDone + } + s.mu.Unlock() + s.write(recvMsg{err: io.EOF}) + } +} + +func (t *http2Server) handleRSTStream(f *http2.RSTStreamFrame) { + s, ok := t.getStream(f) + if !ok { + return + } + t.closeStream(s) +} + +func (t *http2Server) handleSettings(f *http2.SettingsFrame) { + if f.IsAck() { + return + } + var ss []http2.Setting + f.ForeachSetting(func(s http2.Setting) error { + ss = append(ss, s) + return nil + }) + // The settings will be applied once the ack is sent. + t.controlBuf.put(&settings{ack: true, ss: ss}) +} + +func (t *http2Server) handlePing(f *http2.PingFrame) { + if f.IsAck() { // Do nothing. + return + } + pingAck := &ping{ack: true} + copy(pingAck.data[:], f.Data[:]) + t.controlBuf.put(pingAck) +} + +func (t *http2Server) handleWindowUpdate(f *http2.WindowUpdateFrame) { + id := f.Header().StreamID + incr := f.Increment + if id == 0 { + t.sendQuotaPool.add(int(incr)) + return + } + if s, ok := t.getStream(f); ok { + s.sendQuotaPool.add(int(incr)) + } +} + +func (t *http2Server) writeHeaders(s *Stream, b *bytes.Buffer, endStream bool) error { + first := true + endHeaders := false + var err error + // Sends the headers in a single batch. + for !endHeaders { + size := t.hBuf.Len() + if size > http2MaxFrameLen { + size = http2MaxFrameLen + } else { + endHeaders = true + } + if first { + p := http2.HeadersFrameParam{ + StreamID: s.id, + BlockFragment: b.Next(size), + EndStream: endStream, + EndHeaders: endHeaders, + } + err = t.framer.writeHeaders(endHeaders, p) + first = false + } else { + err = t.framer.writeContinuation(endHeaders, s.id, endHeaders, b.Next(size)) + } + if err != nil { + t.Close() + return connectionErrorf(true, err, "transport: %v", err) + } + } + return nil +} + +// WriteHeader sends the header metedata md back to the client. +func (t *http2Server) WriteHeader(s *Stream, md metadata.MD) error { + s.mu.Lock() + if s.headerOk || s.state == streamDone { + s.mu.Unlock() + return ErrIllegalHeaderWrite + } + s.headerOk = true + if md.Len() > 0 { + if s.header.Len() > 0 { + s.header = metadata.Join(s.header, md) + } else { + s.header = md + } + } + md = s.header + s.mu.Unlock() + if _, err := wait(s.ctx, nil, nil, t.shutdownChan, t.writableChan); err != nil { + return err + } + t.hBuf.Reset() + t.hEnc.WriteField(hpack.HeaderField{Name: ":status", Value: "200"}) + t.hEnc.WriteField(hpack.HeaderField{Name: "content-type", Value: "application/grpc"}) + if s.sendCompress != "" { + t.hEnc.WriteField(hpack.HeaderField{Name: "grpc-encoding", Value: s.sendCompress}) + } + for k, v := range md { + if isReservedHeader(k) { + // Clients don't tolerate reading restricted headers after some non restricted ones were sent. + continue + } + for _, entry := range v { + t.hEnc.WriteField(hpack.HeaderField{Name: k, Value: entry}) + } + } + bufLen := t.hBuf.Len() + if err := t.writeHeaders(s, t.hBuf, false); err != nil { + return err + } + if t.stats != nil { + outHeader := &stats.OutHeader{ + WireLength: bufLen, + } + t.stats.HandleRPC(s.Context(), outHeader) + } + t.writableChan <- 0 + return nil +} + +// WriteStatus sends stream status to the client and terminates the stream. +// There is no further I/O operations being able to perform on this stream. +// TODO(zhaoq): Now it indicates the end of entire stream. Revisit if early +// OK is adopted. +func (t *http2Server) WriteStatus(s *Stream, statusCode codes.Code, statusDesc string) error { + var headersSent, hasHeader bool + s.mu.Lock() + if s.state == streamDone { + s.mu.Unlock() + return nil + } + if s.headerOk { + headersSent = true + } + if s.header.Len() > 0 { + hasHeader = true + } + s.mu.Unlock() + + if !headersSent && hasHeader { + t.WriteHeader(s, nil) + headersSent = true + } + + if _, err := wait(s.ctx, nil, nil, t.shutdownChan, t.writableChan); err != nil { + return err + } + t.hBuf.Reset() + if !headersSent { + t.hEnc.WriteField(hpack.HeaderField{Name: ":status", Value: "200"}) + t.hEnc.WriteField(hpack.HeaderField{Name: "content-type", Value: "application/grpc"}) + } + t.hEnc.WriteField( + hpack.HeaderField{ + Name: "grpc-status", + Value: strconv.Itoa(int(statusCode)), + }) + t.hEnc.WriteField(hpack.HeaderField{Name: "grpc-message", Value: encodeGrpcMessage(statusDesc)}) + // Attach the trailer metadata. + for k, v := range s.trailer { + // Clients don't tolerate reading restricted headers after some non restricted ones were sent. + if isReservedHeader(k) { + continue + } + for _, entry := range v { + t.hEnc.WriteField(hpack.HeaderField{Name: k, Value: entry}) + } + } + bufLen := t.hBuf.Len() + if err := t.writeHeaders(s, t.hBuf, true); err != nil { + t.Close() + return err + } + if t.stats != nil { + outTrailer := &stats.OutTrailer{ + WireLength: bufLen, + } + t.stats.HandleRPC(s.Context(), outTrailer) + } + t.closeStream(s) + t.writableChan <- 0 + return nil +} + +// Write converts the data into HTTP2 data frame and sends it out. Non-nil error +// is returns if it fails (e.g., framing error, transport error). +func (t *http2Server) Write(s *Stream, data []byte, opts *Options) error { + // TODO(zhaoq): Support multi-writers for a single stream. + var writeHeaderFrame bool + s.mu.Lock() + if s.state == streamDone { + s.mu.Unlock() + return streamErrorf(codes.Unknown, "the stream has been done") + } + if !s.headerOk { + writeHeaderFrame = true + } + s.mu.Unlock() + if writeHeaderFrame { + t.WriteHeader(s, nil) + } + r := bytes.NewBuffer(data) + for { + if r.Len() == 0 { + return nil + } + size := http2MaxFrameLen + // Wait until the stream has some quota to send the data. + sq, err := wait(s.ctx, nil, nil, t.shutdownChan, s.sendQuotaPool.acquire()) + if err != nil { + return err + } + // Wait until the transport has some quota to send the data. + tq, err := wait(s.ctx, nil, nil, t.shutdownChan, t.sendQuotaPool.acquire()) + if err != nil { + return err + } + if sq < size { + size = sq + } + if tq < size { + size = tq + } + p := r.Next(size) + ps := len(p) + if ps < sq { + // Overbooked stream quota. Return it back. + s.sendQuotaPool.add(sq - ps) + } + if ps < tq { + // Overbooked transport quota. Return it back. + t.sendQuotaPool.add(tq - ps) + } + t.framer.adjustNumWriters(1) + // Got some quota. Try to acquire writing privilege on the + // transport. + if _, err := wait(s.ctx, nil, nil, t.shutdownChan, t.writableChan); err != nil { + if _, ok := err.(StreamError); ok { + // Return the connection quota back. + t.sendQuotaPool.add(ps) + } + if t.framer.adjustNumWriters(-1) == 0 { + // This writer is the last one in this batch and has the + // responsibility to flush the buffered frames. It queues + // a flush request to controlBuf instead of flushing directly + // in order to avoid the race with other writing or flushing. + t.controlBuf.put(&flushIO{}) + } + return err + } + select { + case <-s.ctx.Done(): + t.sendQuotaPool.add(ps) + if t.framer.adjustNumWriters(-1) == 0 { + t.controlBuf.put(&flushIO{}) + } + t.writableChan <- 0 + return ContextErr(s.ctx.Err()) + default: + } + var forceFlush bool + if r.Len() == 0 && t.framer.adjustNumWriters(0) == 1 && !opts.Last { + forceFlush = true + } + if err := t.framer.writeData(forceFlush, s.id, false, p); err != nil { + t.Close() + return connectionErrorf(true, err, "transport: %v", err) + } + if t.framer.adjustNumWriters(-1) == 0 { + t.framer.flushWrite() + } + t.writableChan <- 0 + } + +} + +func (t *http2Server) applySettings(ss []http2.Setting) { + for _, s := range ss { + if s.ID == http2.SettingInitialWindowSize { + t.mu.Lock() + defer t.mu.Unlock() + for _, stream := range t.activeStreams { + stream.sendQuotaPool.add(int(s.Val - t.streamSendQuota)) + } + t.streamSendQuota = s.Val + } + + } +} + +// controller running in a separate goroutine takes charge of sending control +// frames (e.g., window update, reset stream, setting, etc.) to the server. +func (t *http2Server) controller() { + for { + select { + case i := <-t.controlBuf.get(): + t.controlBuf.load() + select { + case <-t.writableChan: + switch i := i.(type) { + case *windowUpdate: + t.framer.writeWindowUpdate(true, i.streamID, i.increment) + case *settings: + if i.ack { + t.framer.writeSettingsAck(true) + t.applySettings(i.ss) + } else { + t.framer.writeSettings(true, i.ss...) + } + case *resetStream: + t.framer.writeRSTStream(true, i.streamID, i.code) + case *goAway: + t.mu.Lock() + if t.state == closing { + t.mu.Unlock() + // The transport is closing. + return + } + sid := t.maxStreamID + t.state = draining + t.mu.Unlock() + t.framer.writeGoAway(true, sid, http2.ErrCodeNo, nil) + case *flushIO: + t.framer.flushWrite() + case *ping: + t.framer.writePing(true, i.ack, i.data) + default: + grpclog.Printf("transport: http2Server.controller got unexpected item type %v\n", i) + } + t.writableChan <- 0 + continue + case <-t.shutdownChan: + return + } + case <-t.shutdownChan: + return + } + } +} + +// Close starts shutting down the http2Server transport. +// TODO(zhaoq): Now the destruction is not blocked on any pending streams. This +// could cause some resource issue. Revisit this later. +func (t *http2Server) Close() (err error) { + t.mu.Lock() + if t.state == closing { + t.mu.Unlock() + return errors.New("transport: Close() was already called") + } + t.state = closing + streams := t.activeStreams + t.activeStreams = nil + t.mu.Unlock() + close(t.shutdownChan) + err = t.conn.Close() + // Cancel all active streams. + for _, s := range streams { + s.cancel() + } + if t.stats != nil { + connEnd := &stats.ConnEnd{} + t.stats.HandleConn(t.ctx, connEnd) + } + return +} + +// closeStream clears the footprint of a stream when the stream is not needed +// any more. +func (t *http2Server) closeStream(s *Stream) { + t.mu.Lock() + delete(t.activeStreams, s.id) + if t.state == draining && len(t.activeStreams) == 0 { + defer t.Close() + } + t.mu.Unlock() + // In case stream sending and receiving are invoked in separate + // goroutines (e.g., bi-directional streaming), cancel needs to be + // called to interrupt the potential blocking on other goroutines. + s.cancel() + s.mu.Lock() + if q := s.fc.resetPendingData(); q > 0 { + if w := t.fc.onRead(q); w > 0 { + t.controlBuf.put(&windowUpdate{0, w}) + } + } + if s.state == streamDone { + s.mu.Unlock() + return + } + s.state = streamDone + s.mu.Unlock() +} + +func (t *http2Server) RemoteAddr() net.Addr { + return t.remoteAddr +} + +func (t *http2Server) Drain() { + t.controlBuf.put(&goAway{}) +} diff --git a/vendor/google.golang.org/grpc/transport/http_util.go b/vendor/google.golang.org/grpc/transport/http_util.go new file mode 100644 index 0000000..a3c68d4 --- /dev/null +++ b/vendor/google.golang.org/grpc/transport/http_util.go @@ -0,0 +1,513 @@ +/* + * + * Copyright 2014, Google Inc. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are + * met: + * + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following disclaimer + * in the documentation and/or other materials provided with the + * distribution. + * * Neither the name of Google Inc. nor the names of its + * contributors may be used to endorse or promote products derived from + * this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT + * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * + */ + +package transport + +import ( + "bufio" + "bytes" + "fmt" + "io" + "net" + "strconv" + "strings" + "sync/atomic" + "time" + + "golang.org/x/net/http2" + "golang.org/x/net/http2/hpack" + "google.golang.org/grpc/codes" + "google.golang.org/grpc/grpclog" + "google.golang.org/grpc/metadata" +) + +const ( + // The primary user agent + primaryUA = "grpc-go/1.0" + // http2MaxFrameLen specifies the max length of a HTTP2 frame. + http2MaxFrameLen = 16384 // 16KB frame + // http://http2.github.io/http2-spec/#SettingValues + http2InitHeaderTableSize = 4096 + // http2IOBufSize specifies the buffer size for sending frames. + http2IOBufSize = 32 * 1024 +) + +var ( + clientPreface = []byte(http2.ClientPreface) + http2ErrConvTab = map[http2.ErrCode]codes.Code{ + http2.ErrCodeNo: codes.Internal, + http2.ErrCodeProtocol: codes.Internal, + http2.ErrCodeInternal: codes.Internal, + http2.ErrCodeFlowControl: codes.ResourceExhausted, + http2.ErrCodeSettingsTimeout: codes.Internal, + http2.ErrCodeStreamClosed: codes.Internal, + http2.ErrCodeFrameSize: codes.Internal, + http2.ErrCodeRefusedStream: codes.Unavailable, + http2.ErrCodeCancel: codes.Canceled, + http2.ErrCodeCompression: codes.Internal, + http2.ErrCodeConnect: codes.Internal, + http2.ErrCodeEnhanceYourCalm: codes.ResourceExhausted, + http2.ErrCodeInadequateSecurity: codes.PermissionDenied, + http2.ErrCodeHTTP11Required: codes.FailedPrecondition, + } + statusCodeConvTab = map[codes.Code]http2.ErrCode{ + codes.Internal: http2.ErrCodeInternal, + codes.Canceled: http2.ErrCodeCancel, + codes.Unavailable: http2.ErrCodeRefusedStream, + codes.ResourceExhausted: http2.ErrCodeEnhanceYourCalm, + codes.PermissionDenied: http2.ErrCodeInadequateSecurity, + } +) + +// Records the states during HPACK decoding. Must be reset once the +// decoding of the entire headers are finished. +type decodeState struct { + err error // first error encountered decoding + + encoding string + // statusCode caches the stream status received from the trailer + // the server sent. Client side only. + statusCode codes.Code + statusDesc string + // Server side only fields. + timeoutSet bool + timeout time.Duration + method string + // key-value metadata map from the peer. + mdata map[string][]string +} + +// isReservedHeader checks whether hdr belongs to HTTP2 headers +// reserved by gRPC protocol. Any other headers are classified as the +// user-specified metadata. +func isReservedHeader(hdr string) bool { + if hdr != "" && hdr[0] == ':' { + return true + } + switch hdr { + case "content-type", + "grpc-message-type", + "grpc-encoding", + "grpc-message", + "grpc-status", + "grpc-timeout", + "te": + return true + default: + return false + } +} + +// isWhitelistedPseudoHeader checks whether hdr belongs to HTTP2 pseudoheaders +// that should be propagated into metadata visible to users. +func isWhitelistedPseudoHeader(hdr string) bool { + switch hdr { + case ":authority": + return true + default: + return false + } +} + +func (d *decodeState) setErr(err error) { + if d.err == nil { + d.err = err + } +} + +func validContentType(t string) bool { + e := "application/grpc" + if !strings.HasPrefix(t, e) { + return false + } + // Support variations on the content-type + // (e.g. "application/grpc+blah", "application/grpc;blah"). + if len(t) > len(e) && t[len(e)] != '+' && t[len(e)] != ';' { + return false + } + return true +} + +func (d *decodeState) processHeaderField(f hpack.HeaderField) { + switch f.Name { + case "content-type": + if !validContentType(f.Value) { + d.setErr(streamErrorf(codes.FailedPrecondition, "transport: received the unexpected content-type %q", f.Value)) + return + } + case "grpc-encoding": + d.encoding = f.Value + case "grpc-status": + code, err := strconv.Atoi(f.Value) + if err != nil { + d.setErr(streamErrorf(codes.Internal, "transport: malformed grpc-status: %v", err)) + return + } + d.statusCode = codes.Code(code) + case "grpc-message": + d.statusDesc = decodeGrpcMessage(f.Value) + case "grpc-timeout": + d.timeoutSet = true + var err error + d.timeout, err = decodeTimeout(f.Value) + if err != nil { + d.setErr(streamErrorf(codes.Internal, "transport: malformed time-out: %v", err)) + return + } + case ":path": + d.method = f.Value + default: + if !isReservedHeader(f.Name) || isWhitelistedPseudoHeader(f.Name) { + if f.Name == "user-agent" { + i := strings.LastIndex(f.Value, " ") + if i == -1 { + // There is no application user agent string being set. + return + } + // Extract the application user agent string. + f.Value = f.Value[:i] + } + if d.mdata == nil { + d.mdata = make(map[string][]string) + } + k, v, err := metadata.DecodeKeyValue(f.Name, f.Value) + if err != nil { + grpclog.Printf("Failed to decode (%q, %q): %v", f.Name, f.Value, err) + return + } + d.mdata[k] = append(d.mdata[k], v) + } + } +} + +type timeoutUnit uint8 + +const ( + hour timeoutUnit = 'H' + minute timeoutUnit = 'M' + second timeoutUnit = 'S' + millisecond timeoutUnit = 'm' + microsecond timeoutUnit = 'u' + nanosecond timeoutUnit = 'n' +) + +func timeoutUnitToDuration(u timeoutUnit) (d time.Duration, ok bool) { + switch u { + case hour: + return time.Hour, true + case minute: + return time.Minute, true + case second: + return time.Second, true + case millisecond: + return time.Millisecond, true + case microsecond: + return time.Microsecond, true + case nanosecond: + return time.Nanosecond, true + default: + } + return +} + +const maxTimeoutValue int64 = 100000000 - 1 + +// div does integer division and round-up the result. Note that this is +// equivalent to (d+r-1)/r but has less chance to overflow. +func div(d, r time.Duration) int64 { + if m := d % r; m > 0 { + return int64(d/r + 1) + } + return int64(d / r) +} + +// TODO(zhaoq): It is the simplistic and not bandwidth efficient. Improve it. +func encodeTimeout(t time.Duration) string { + if t <= 0 { + return "0n" + } + if d := div(t, time.Nanosecond); d <= maxTimeoutValue { + return strconv.FormatInt(d, 10) + "n" + } + if d := div(t, time.Microsecond); d <= maxTimeoutValue { + return strconv.FormatInt(d, 10) + "u" + } + if d := div(t, time.Millisecond); d <= maxTimeoutValue { + return strconv.FormatInt(d, 10) + "m" + } + if d := div(t, time.Second); d <= maxTimeoutValue { + return strconv.FormatInt(d, 10) + "S" + } + if d := div(t, time.Minute); d <= maxTimeoutValue { + return strconv.FormatInt(d, 10) + "M" + } + // Note that maxTimeoutValue * time.Hour > MaxInt64. + return strconv.FormatInt(div(t, time.Hour), 10) + "H" +} + +func decodeTimeout(s string) (time.Duration, error) { + size := len(s) + if size < 2 { + return 0, fmt.Errorf("transport: timeout string is too short: %q", s) + } + unit := timeoutUnit(s[size-1]) + d, ok := timeoutUnitToDuration(unit) + if !ok { + return 0, fmt.Errorf("transport: timeout unit is not recognized: %q", s) + } + t, err := strconv.ParseInt(s[:size-1], 10, 64) + if err != nil { + return 0, err + } + return d * time.Duration(t), nil +} + +const ( + spaceByte = ' ' + tildaByte = '~' + percentByte = '%' +) + +// encodeGrpcMessage is used to encode status code in header field +// "grpc-message". +// It checks to see if each individual byte in msg is an +// allowable byte, and then either percent encoding or passing it through. +// When percent encoding, the byte is converted into hexadecimal notation +// with a '%' prepended. +func encodeGrpcMessage(msg string) string { + if msg == "" { + return "" + } + lenMsg := len(msg) + for i := 0; i < lenMsg; i++ { + c := msg[i] + if !(c >= spaceByte && c < tildaByte && c != percentByte) { + return encodeGrpcMessageUnchecked(msg) + } + } + return msg +} + +func encodeGrpcMessageUnchecked(msg string) string { + var buf bytes.Buffer + lenMsg := len(msg) + for i := 0; i < lenMsg; i++ { + c := msg[i] + if c >= spaceByte && c < tildaByte && c != percentByte { + buf.WriteByte(c) + } else { + buf.WriteString(fmt.Sprintf("%%%02X", c)) + } + } + return buf.String() +} + +// decodeGrpcMessage decodes the msg encoded by encodeGrpcMessage. +func decodeGrpcMessage(msg string) string { + if msg == "" { + return "" + } + lenMsg := len(msg) + for i := 0; i < lenMsg; i++ { + if msg[i] == percentByte && i+2 < lenMsg { + return decodeGrpcMessageUnchecked(msg) + } + } + return msg +} + +func decodeGrpcMessageUnchecked(msg string) string { + var buf bytes.Buffer + lenMsg := len(msg) + for i := 0; i < lenMsg; i++ { + c := msg[i] + if c == percentByte && i+2 < lenMsg { + parsed, err := strconv.ParseUint(msg[i+1:i+3], 16, 8) + if err != nil { + buf.WriteByte(c) + } else { + buf.WriteByte(byte(parsed)) + i += 2 + } + } else { + buf.WriteByte(c) + } + } + return buf.String() +} + +type framer struct { + numWriters int32 + reader io.Reader + writer *bufio.Writer + fr *http2.Framer +} + +func newFramer(conn net.Conn) *framer { + f := &framer{ + reader: bufio.NewReaderSize(conn, http2IOBufSize), + writer: bufio.NewWriterSize(conn, http2IOBufSize), + } + f.fr = http2.NewFramer(f.writer, f.reader) + f.fr.ReadMetaHeaders = hpack.NewDecoder(http2InitHeaderTableSize, nil) + return f +} + +func (f *framer) adjustNumWriters(i int32) int32 { + return atomic.AddInt32(&f.numWriters, i) +} + +// The following writeXXX functions can only be called when the caller gets +// unblocked from writableChan channel (i.e., owns the privilege to write). + +func (f *framer) writeContinuation(forceFlush bool, streamID uint32, endHeaders bool, headerBlockFragment []byte) error { + if err := f.fr.WriteContinuation(streamID, endHeaders, headerBlockFragment); err != nil { + return err + } + if forceFlush { + return f.writer.Flush() + } + return nil +} + +func (f *framer) writeData(forceFlush bool, streamID uint32, endStream bool, data []byte) error { + if err := f.fr.WriteData(streamID, endStream, data); err != nil { + return err + } + if forceFlush { + return f.writer.Flush() + } + return nil +} + +func (f *framer) writeGoAway(forceFlush bool, maxStreamID uint32, code http2.ErrCode, debugData []byte) error { + if err := f.fr.WriteGoAway(maxStreamID, code, debugData); err != nil { + return err + } + if forceFlush { + return f.writer.Flush() + } + return nil +} + +func (f *framer) writeHeaders(forceFlush bool, p http2.HeadersFrameParam) error { + if err := f.fr.WriteHeaders(p); err != nil { + return err + } + if forceFlush { + return f.writer.Flush() + } + return nil +} + +func (f *framer) writePing(forceFlush, ack bool, data [8]byte) error { + if err := f.fr.WritePing(ack, data); err != nil { + return err + } + if forceFlush { + return f.writer.Flush() + } + return nil +} + +func (f *framer) writePriority(forceFlush bool, streamID uint32, p http2.PriorityParam) error { + if err := f.fr.WritePriority(streamID, p); err != nil { + return err + } + if forceFlush { + return f.writer.Flush() + } + return nil +} + +func (f *framer) writePushPromise(forceFlush bool, p http2.PushPromiseParam) error { + if err := f.fr.WritePushPromise(p); err != nil { + return err + } + if forceFlush { + return f.writer.Flush() + } + return nil +} + +func (f *framer) writeRSTStream(forceFlush bool, streamID uint32, code http2.ErrCode) error { + if err := f.fr.WriteRSTStream(streamID, code); err != nil { + return err + } + if forceFlush { + return f.writer.Flush() + } + return nil +} + +func (f *framer) writeSettings(forceFlush bool, settings ...http2.Setting) error { + if err := f.fr.WriteSettings(settings...); err != nil { + return err + } + if forceFlush { + return f.writer.Flush() + } + return nil +} + +func (f *framer) writeSettingsAck(forceFlush bool) error { + if err := f.fr.WriteSettingsAck(); err != nil { + return err + } + if forceFlush { + return f.writer.Flush() + } + return nil +} + +func (f *framer) writeWindowUpdate(forceFlush bool, streamID, incr uint32) error { + if err := f.fr.WriteWindowUpdate(streamID, incr); err != nil { + return err + } + if forceFlush { + return f.writer.Flush() + } + return nil +} + +func (f *framer) flushWrite() error { + return f.writer.Flush() +} + +func (f *framer) readFrame() (http2.Frame, error) { + return f.fr.ReadFrame() +} + +func (f *framer) errorDetail() error { + return f.fr.ErrorDetail() +} diff --git a/vendor/google.golang.org/grpc/transport/pre_go16.go b/vendor/google.golang.org/grpc/transport/pre_go16.go new file mode 100644 index 0000000..33d91c1 --- /dev/null +++ b/vendor/google.golang.org/grpc/transport/pre_go16.go @@ -0,0 +1,51 @@ +// +build !go1.6 + +/* + * Copyright 2016, Google Inc. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are + * met: + * + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following disclaimer + * in the documentation and/or other materials provided with the + * distribution. + * * Neither the name of Google Inc. nor the names of its + * contributors may be used to endorse or promote products derived from + * this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT + * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * + */ + +package transport + +import ( + "net" + "time" + + "golang.org/x/net/context" +) + +// dialContext connects to the address on the named network. +func dialContext(ctx context.Context, network, address string) (net.Conn, error) { + var dialer net.Dialer + if deadline, ok := ctx.Deadline(); ok { + dialer.Timeout = deadline.Sub(time.Now()) + } + return dialer.Dial(network, address) +} diff --git a/vendor/google.golang.org/grpc/transport/transport.go b/vendor/google.golang.org/grpc/transport/transport.go new file mode 100644 index 0000000..d465991 --- /dev/null +++ b/vendor/google.golang.org/grpc/transport/transport.go @@ -0,0 +1,608 @@ +/* + * + * Copyright 2014, Google Inc. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are + * met: + * + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following disclaimer + * in the documentation and/or other materials provided with the + * distribution. + * * Neither the name of Google Inc. nor the names of its + * contributors may be used to endorse or promote products derived from + * this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT + * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * + */ + +/* +Package transport defines and implements message oriented communication channel +to complete various transactions (e.g., an RPC). +*/ +package transport // import "google.golang.org/grpc/transport" + +import ( + "bytes" + "fmt" + "io" + "net" + "sync" + + "golang.org/x/net/context" + "google.golang.org/grpc/codes" + "google.golang.org/grpc/credentials" + "google.golang.org/grpc/metadata" + "google.golang.org/grpc/stats" + "google.golang.org/grpc/tap" +) + +// recvMsg represents the received msg from the transport. All transport +// protocol specific info has been removed. +type recvMsg struct { + data []byte + // nil: received some data + // io.EOF: stream is completed. data is nil. + // other non-nil error: transport failure. data is nil. + err error +} + +func (*recvMsg) item() {} + +// All items in an out of a recvBuffer should be the same type. +type item interface { + item() +} + +// recvBuffer is an unbounded channel of item. +type recvBuffer struct { + c chan item + mu sync.Mutex + backlog []item +} + +func newRecvBuffer() *recvBuffer { + b := &recvBuffer{ + c: make(chan item, 1), + } + return b +} + +func (b *recvBuffer) put(r item) { + b.mu.Lock() + defer b.mu.Unlock() + if len(b.backlog) == 0 { + select { + case b.c <- r: + return + default: + } + } + b.backlog = append(b.backlog, r) +} + +func (b *recvBuffer) load() { + b.mu.Lock() + defer b.mu.Unlock() + if len(b.backlog) > 0 { + select { + case b.c <- b.backlog[0]: + b.backlog = b.backlog[1:] + default: + } + } +} + +// get returns the channel that receives an item in the buffer. +// +// Upon receipt of an item, the caller should call load to send another +// item onto the channel if there is any. +func (b *recvBuffer) get() <-chan item { + return b.c +} + +// recvBufferReader implements io.Reader interface to read the data from +// recvBuffer. +type recvBufferReader struct { + ctx context.Context + goAway chan struct{} + recv *recvBuffer + last *bytes.Reader // Stores the remaining data in the previous calls. + err error +} + +// Read reads the next len(p) bytes from last. If last is drained, it tries to +// read additional data from recv. It blocks if there no additional data available +// in recv. If Read returns any non-nil error, it will continue to return that error. +func (r *recvBufferReader) Read(p []byte) (n int, err error) { + if r.err != nil { + return 0, r.err + } + defer func() { r.err = err }() + if r.last != nil && r.last.Len() > 0 { + // Read remaining data left in last call. + return r.last.Read(p) + } + select { + case <-r.ctx.Done(): + return 0, ContextErr(r.ctx.Err()) + case <-r.goAway: + return 0, ErrStreamDrain + case i := <-r.recv.get(): + r.recv.load() + m := i.(*recvMsg) + if m.err != nil { + return 0, m.err + } + r.last = bytes.NewReader(m.data) + return r.last.Read(p) + } +} + +type streamState uint8 + +const ( + streamActive streamState = iota + streamWriteDone // EndStream sent + streamReadDone // EndStream received + streamDone // the entire stream is finished. +) + +// Stream represents an RPC in the transport layer. +type Stream struct { + id uint32 + // nil for client side Stream. + st ServerTransport + // clientStatsCtx keeps the user context for stats handling. + // It's only valid on client side. Server side stats context is same as s.ctx. + // All client side stats collection should use the clientStatsCtx (instead of the stream context) + // so that all the generated stats for a particular RPC can be associated in the processing phase. + clientStatsCtx context.Context + // ctx is the associated context of the stream. + ctx context.Context + // cancel is always nil for client side Stream. + cancel context.CancelFunc + // done is closed when the final status arrives. + done chan struct{} + // goAway is closed when the server sent GoAways signal before this stream was initiated. + goAway chan struct{} + // method records the associated RPC method of the stream. + method string + recvCompress string + sendCompress string + buf *recvBuffer + dec io.Reader + fc *inFlow + recvQuota uint32 + // The accumulated inbound quota pending for window update. + updateQuota uint32 + // The handler to control the window update procedure for both this + // particular stream and the associated transport. + windowHandler func(int) + + sendQuotaPool *quotaPool + // Close headerChan to indicate the end of reception of header metadata. + headerChan chan struct{} + // header caches the received header metadata. + header metadata.MD + // The key-value map of trailer metadata. + trailer metadata.MD + + mu sync.RWMutex // guard the following + // headerOK becomes true from the first header is about to send. + headerOk bool + state streamState + // true iff headerChan is closed. Used to avoid closing headerChan + // multiple times. + headerDone bool + // the status received from the server. + statusCode codes.Code + statusDesc string +} + +// RecvCompress returns the compression algorithm applied to the inbound +// message. It is empty string if there is no compression applied. +func (s *Stream) RecvCompress() string { + return s.recvCompress +} + +// SetSendCompress sets the compression algorithm to the stream. +func (s *Stream) SetSendCompress(str string) { + s.sendCompress = str +} + +// Done returns a chanel which is closed when it receives the final status +// from the server. +func (s *Stream) Done() <-chan struct{} { + return s.done +} + +// GoAway returns a channel which is closed when the server sent GoAways signal +// before this stream was initiated. +func (s *Stream) GoAway() <-chan struct{} { + return s.goAway +} + +// Header acquires the key-value pairs of header metadata once it +// is available. It blocks until i) the metadata is ready or ii) there is no +// header metadata or iii) the stream is cancelled/expired. +func (s *Stream) Header() (metadata.MD, error) { + select { + case <-s.ctx.Done(): + return nil, ContextErr(s.ctx.Err()) + case <-s.goAway: + return nil, ErrStreamDrain + case <-s.headerChan: + return s.header.Copy(), nil + } +} + +// Trailer returns the cached trailer metedata. Note that if it is not called +// after the entire stream is done, it could return an empty MD. Client +// side only. +func (s *Stream) Trailer() metadata.MD { + s.mu.RLock() + defer s.mu.RUnlock() + return s.trailer.Copy() +} + +// ServerTransport returns the underlying ServerTransport for the stream. +// The client side stream always returns nil. +func (s *Stream) ServerTransport() ServerTransport { + return s.st +} + +// Context returns the context of the stream. +func (s *Stream) Context() context.Context { + return s.ctx +} + +// Method returns the method for the stream. +func (s *Stream) Method() string { + return s.method +} + +// StatusCode returns statusCode received from the server. +func (s *Stream) StatusCode() codes.Code { + return s.statusCode +} + +// StatusDesc returns statusDesc received from the server. +func (s *Stream) StatusDesc() string { + return s.statusDesc +} + +// SetHeader sets the header metadata. This can be called multiple times. +// Server side only. +func (s *Stream) SetHeader(md metadata.MD) error { + s.mu.Lock() + defer s.mu.Unlock() + if s.headerOk || s.state == streamDone { + return ErrIllegalHeaderWrite + } + if md.Len() == 0 { + return nil + } + s.header = metadata.Join(s.header, md) + return nil +} + +// SetTrailer sets the trailer metadata which will be sent with the RPC status +// by the server. This can be called multiple times. Server side only. +func (s *Stream) SetTrailer(md metadata.MD) error { + if md.Len() == 0 { + return nil + } + s.mu.Lock() + defer s.mu.Unlock() + s.trailer = metadata.Join(s.trailer, md) + return nil +} + +func (s *Stream) write(m recvMsg) { + s.buf.put(&m) +} + +// Read reads all the data available for this Stream from the transport and +// passes them into the decoder, which converts them into a gRPC message stream. +// The error is io.EOF when the stream is done or another non-nil error if +// the stream broke. +func (s *Stream) Read(p []byte) (n int, err error) { + n, err = s.dec.Read(p) + if err != nil { + return + } + s.windowHandler(n) + return +} + +// The key to save transport.Stream in the context. +type streamKey struct{} + +// newContextWithStream creates a new context from ctx and attaches stream +// to it. +func newContextWithStream(ctx context.Context, stream *Stream) context.Context { + return context.WithValue(ctx, streamKey{}, stream) +} + +// StreamFromContext returns the stream saved in ctx. +func StreamFromContext(ctx context.Context) (s *Stream, ok bool) { + s, ok = ctx.Value(streamKey{}).(*Stream) + return +} + +// state of transport +type transportState int + +const ( + reachable transportState = iota + unreachable + closing + draining +) + +// ServerConfig consists of all the configurations to establish a server transport. +type ServerConfig struct { + MaxStreams uint32 + AuthInfo credentials.AuthInfo + InTapHandle tap.ServerInHandle + StatsHandler stats.Handler +} + +// NewServerTransport creates a ServerTransport with conn or non-nil error +// if it fails. +func NewServerTransport(protocol string, conn net.Conn, config *ServerConfig) (ServerTransport, error) { + return newHTTP2Server(conn, config) +} + +// ConnectOptions covers all relevant options for communicating with the server. +type ConnectOptions struct { + // UserAgent is the application user agent. + UserAgent string + // Dialer specifies how to dial a network address. + Dialer func(context.Context, string) (net.Conn, error) + // FailOnNonTempDialError specifies if gRPC fails on non-temporary dial errors. + FailOnNonTempDialError bool + // PerRPCCredentials stores the PerRPCCredentials required to issue RPCs. + PerRPCCredentials []credentials.PerRPCCredentials + // TransportCredentials stores the Authenticator required to setup a client connection. + TransportCredentials credentials.TransportCredentials + // StatsHandler stores the handler for stats. + StatsHandler stats.Handler +} + +// TargetInfo contains the information of the target such as network address and metadata. +type TargetInfo struct { + Addr string + Metadata interface{} +} + +// NewClientTransport establishes the transport with the required ConnectOptions +// and returns it to the caller. +func NewClientTransport(ctx context.Context, target TargetInfo, opts ConnectOptions) (ClientTransport, error) { + return newHTTP2Client(ctx, target, opts) +} + +// Options provides additional hints and information for message +// transmission. +type Options struct { + // Last indicates whether this write is the last piece for + // this stream. + Last bool + + // Delay is a hint to the transport implementation for whether + // the data could be buffered for a batching write. The + // Transport implementation may ignore the hint. + Delay bool +} + +// CallHdr carries the information of a particular RPC. +type CallHdr struct { + // Host specifies the peer's host. + Host string + + // Method specifies the operation to perform. + Method string + + // RecvCompress specifies the compression algorithm applied on + // inbound messages. + RecvCompress string + + // SendCompress specifies the compression algorithm applied on + // outbound message. + SendCompress string + + // Flush indicates whether a new stream command should be sent + // to the peer without waiting for the first data. This is + // only a hint. The transport may modify the flush decision + // for performance purposes. + Flush bool +} + +// ClientTransport is the common interface for all gRPC client-side transport +// implementations. +type ClientTransport interface { + // Close tears down this transport. Once it returns, the transport + // should not be accessed any more. The caller must make sure this + // is called only once. + Close() error + + // GracefulClose starts to tear down the transport. It stops accepting + // new RPCs and wait the completion of the pending RPCs. + GracefulClose() error + + // Write sends the data for the given stream. A nil stream indicates + // the write is to be performed on the transport as a whole. + Write(s *Stream, data []byte, opts *Options) error + + // NewStream creates a Stream for an RPC. + NewStream(ctx context.Context, callHdr *CallHdr) (*Stream, error) + + // CloseStream clears the footprint of a stream when the stream is + // not needed any more. The err indicates the error incurred when + // CloseStream is called. Must be called when a stream is finished + // unless the associated transport is closing. + CloseStream(stream *Stream, err error) + + // Error returns a channel that is closed when some I/O error + // happens. Typically the caller should have a goroutine to monitor + // this in order to take action (e.g., close the current transport + // and create a new one) in error case. It should not return nil + // once the transport is initiated. + Error() <-chan struct{} + + // GoAway returns a channel that is closed when ClientTranspor + // receives the draining signal from the server (e.g., GOAWAY frame in + // HTTP/2). + GoAway() <-chan struct{} +} + +// ServerTransport is the common interface for all gRPC server-side transport +// implementations. +// +// Methods may be called concurrently from multiple goroutines, but +// Write methods for a given Stream will be called serially. +type ServerTransport interface { + // HandleStreams receives incoming streams using the given handler. + HandleStreams(func(*Stream), func(context.Context, string) context.Context) + + // WriteHeader sends the header metadata for the given stream. + // WriteHeader may not be called on all streams. + WriteHeader(s *Stream, md metadata.MD) error + + // Write sends the data for the given stream. + // Write may not be called on all streams. + Write(s *Stream, data []byte, opts *Options) error + + // WriteStatus sends the status of a stream to the client. + // WriteStatus is the final call made on a stream and always + // occurs. + WriteStatus(s *Stream, statusCode codes.Code, statusDesc string) error + + // Close tears down the transport. Once it is called, the transport + // should not be accessed any more. All the pending streams and their + // handlers will be terminated asynchronously. + Close() error + + // RemoteAddr returns the remote network address. + RemoteAddr() net.Addr + + // Drain notifies the client this ServerTransport stops accepting new RPCs. + Drain() +} + +// streamErrorf creates an StreamError with the specified error code and description. +func streamErrorf(c codes.Code, format string, a ...interface{}) StreamError { + return StreamError{ + Code: c, + Desc: fmt.Sprintf(format, a...), + } +} + +// connectionErrorf creates an ConnectionError with the specified error description. +func connectionErrorf(temp bool, e error, format string, a ...interface{}) ConnectionError { + return ConnectionError{ + Desc: fmt.Sprintf(format, a...), + temp: temp, + err: e, + } +} + +// ConnectionError is an error that results in the termination of the +// entire connection and the retry of all the active streams. +type ConnectionError struct { + Desc string + temp bool + err error +} + +func (e ConnectionError) Error() string { + return fmt.Sprintf("connection error: desc = %q", e.Desc) +} + +// Temporary indicates if this connection error is temporary or fatal. +func (e ConnectionError) Temporary() bool { + return e.temp +} + +// Origin returns the original error of this connection error. +func (e ConnectionError) Origin() error { + // Never return nil error here. + // If the original error is nil, return itself. + if e.err == nil { + return e + } + return e.err +} + +var ( + // ErrConnClosing indicates that the transport is closing. + ErrConnClosing = connectionErrorf(true, nil, "transport is closing") + // ErrStreamDrain indicates that the stream is rejected by the server because + // the server stops accepting new RPCs. + ErrStreamDrain = streamErrorf(codes.Unavailable, "the server stops accepting new RPCs") +) + +// StreamError is an error that only affects one stream within a connection. +type StreamError struct { + Code codes.Code + Desc string +} + +func (e StreamError) Error() string { + return fmt.Sprintf("stream error: code = %d desc = %q", e.Code, e.Desc) +} + +// ContextErr converts the error from context package into a StreamError. +func ContextErr(err error) StreamError { + switch err { + case context.DeadlineExceeded: + return streamErrorf(codes.DeadlineExceeded, "%v", err) + case context.Canceled: + return streamErrorf(codes.Canceled, "%v", err) + } + panic(fmt.Sprintf("Unexpected error from context packet: %v", err)) +} + +// wait blocks until it can receive from ctx.Done, closing, or proceed. +// If it receives from ctx.Done, it returns 0, the StreamError for ctx.Err. +// If it receives from done, it returns 0, io.EOF if ctx is not done; otherwise +// it return the StreamError for ctx.Err. +// If it receives from goAway, it returns 0, ErrStreamDrain. +// If it receives from closing, it returns 0, ErrConnClosing. +// If it receives from proceed, it returns the received integer, nil. +func wait(ctx context.Context, done, goAway, closing <-chan struct{}, proceed <-chan int) (int, error) { + select { + case <-ctx.Done(): + return 0, ContextErr(ctx.Err()) + case <-done: + // User cancellation has precedence. + select { + case <-ctx.Done(): + return 0, ContextErr(ctx.Err()) + default: + } + return 0, io.EOF + case <-goAway: + return 0, ErrStreamDrain + case <-closing: + return 0, ErrConnClosing + case i := <-proceed: + return i, nil + } +}