Add dependencies

.gitignore

@@ -21,7 +21,5 @@ _testmain.go
 
 *.exe
 
-/vendor/src
-
 # Data, etc
 /data

vendor/manifest

@@ -1,11 +1,97 @@
 {
 	"version": 0,
 	"dependencies": [
+		{
+			"importpath": "github.com/Xe/middleware",
+			"repository": "https://github.com/Xe/middleware",
+			"revision": "7d23200fbed9e7f3be4ac76b4f7f6bd19cc4aba0",
+			"branch": "master"
+		},
 		{
 			"importpath": "github.com/codegangsta/negroni",
 			"repository": "https://github.com/codegangsta/negroni",
 			"revision": "c7477ad8e330bef55bf1ebe300cf8aa67c492d1b",
 			"branch": "master"
+		},
+		{
+			"importpath": "github.com/disintegration/imaging",
+			"repository": "https://github.com/disintegration/imaging",
+			"revision": "3ab6ec550f20d497d2755ed3c48a3e45ad6b7eb9",
+			"branch": "master"
+		},
+		{
+			"importpath": "github.com/drone/routes",
+			"repository": "https://github.com/drone/routes",
+			"revision": "853bef2b231162bb7b09355720416d3af1510d88",
+			"branch": "master"
+		},
+		{
+			"importpath": "github.com/garyburd/redigo",
+			"repository": "https://github.com/garyburd/redigo",
+			"revision": "a47585eaae68b1d14b02940d2af1b9194f3caa9c",
+			"branch": "master"
+		},
+		{
+			"importpath": "github.com/gorilla/context",
+			"repository": "https://github.com/gorilla/context",
+			"revision": "215affda49addc4c8ef7e2534915df2c8c35c6cd",
+			"branch": "master"
+		},
+		{
+			"importpath": "github.com/gorilla/mux",
+			"repository": "https://github.com/gorilla/mux",
+			"revision": "f15e0c49460fd49eebe2bcc8486b05d1bef68d3a",
+			"branch": "master"
+		},
+		{
+			"importpath": "github.com/jinzhu/gorm",
+			"repository": "https://github.com/jinzhu/gorm",
+			"revision": "6a7dda9a32e187c044178aadb0a4510f053a73fa",
+			"branch": "master"
+		},
+		{
+			"importpath": "github.com/lib/pq",
+			"repository": "https://github.com/lib/pq",
+			"revision": "0dad96c0b94f8dee039aa40467f767467392a0af",
+			"branch": "master"
+		},
+		{
+			"importpath": "github.com/sebest/xff",
+			"repository": "https://github.com/sebest/xff",
+			"revision": "d90d345f39f4e84675192d6662c42f33a46ec830",
+			"branch": "master"
+		},
+		{
+			"importpath": "github.com/thoj/go-ircevent",
+			"repository": "https://github.com/thoj/go-ircevent",
+			"revision": "c47f9d8e3db1e137c31efbd755bd563d1bf29efc",
+			"branch": "master"
+		},
+		{
+			"importpath": "github.com/unrolled/render",
+			"repository": "https://github.com/unrolled/render",
+			"revision": "aa61028b1d32873eaa3e261a3ef0e892a153107b",
+			"branch": "v1"
+		},
+		{
+			"importpath": "github.com/yosssi/ace-proxy",
+			"repository": "https://github.com/yosssi/ace-proxy",
+			"revision": "ecd9b785e6023e00b1a451cdf584a30d4eff14c0",
+			"branch": "master"
+		},
+		{
+			"importpath": "golang.org/x/image/bmp",
+			"repository": "https://go.googlesource.com/image",
+			"revision": "5ec5e003b21ac1f06e175898413ada23a6797fc0",
+			"branch": "master",
+			"path": "/bmp"
+		},
+		{
+			"importpath": "golang.org/x/image/tiff",
+			"repository": "https://go.googlesource.com/image",
+			"revision": "5ec5e003b21ac1f06e175898413ada23a6797fc0",
+			"branch": "master",
+			"path": "/tiff"
 		}
 	]
 }

vendor/src/github.com/Xe/middleware/README.md

@@ -0,0 +1,2 @@
+# middleware
+All of the useful middlewares I use

vendor/src/github.com/Xe/middleware/inject.go

@@ -0,0 +1,13 @@
+package middleware
+
+import (
+	"github.com/Xe/middleware/xff"
+	"github.com/Xe/middleware/xrequestid"
+	"github.com/codegangsta/negroni"
+)
+
+// Inject adds x-request-id and x-forwarded-for support to an existing negroni instance.
+func Inject(n *negroni.Negroni) {
+	n.Use(negroni.HandlerFunc(xff.XFF))
+	n.Use(xrequestid.New(26))
+}

vendor/src/github.com/Xe/middleware/xff/README.md

@@ -0,0 +1,43 @@
+# X-Forwarded-For middleware fo Go [![godoc](http://img.shields.io/badge/godoc-reference-blue.svg?style=flat)](https://godoc.org/github.com/sebest/xff)
+
+Package `xff` is a `net/http` middleware/handler to parse [Forwarded HTTP Extension](http://tools.ietf.org/html/rfc7239) in Golang.
+
+## Example usage
+
+Install `xff`:
+
+    go get github.com/sebest/xff
+
+Edit `server.go`:
+
+```go
+package main
+
+import (
+  "net/http"
+
+  "github.com/sebest/xff"
+)
+
+func main() {
+  handler := http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+    w.Write([]byte("hello from " + r.RemoteAddr + "\n"))
+  })
+
+  http.ListenAndServe(":8080", xff.Handler(handler))
+}
+```
+
+Then run your server:
+
+    go run server.go
+
+The server now runs on `localhost:8080`:
+
+    $ curl -D - -H 'X-Forwarded-For: 42.42.42.42' http://localhost:8080/
+    HTTP/1.1 200 OK
+    Date: Fri, 20 Feb 2015 20:03:02 GMT
+    Content-Length: 29
+    Content-Type: text/plain; charset=utf-8
+
+    hello from 42.42.42.42:52661

vendor/src/github.com/Xe/middleware/xff/examples/negroni/main.go

@@ -0,0 +1,23 @@
+package main
+
+import (
+	"net/http"
+
+	"github.com/codegangsta/negroni"
+	"github.com/gorilla/mux"
+	"github.com/sebest/xff"
+)
+
+func main() {
+	handler := http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		w.Write([]byte("hello from " + r.RemoteAddr + "\n"))
+	})
+
+	mux := mux.NewRouter()
+	mux.Handle("/", handler)
+
+	n := negroni.Classic()
+	n.Use(negroni.HandlerFunc(xff.XFF))
+	n.UseHandler(mux)
+	n.Run(":3000")
+}

vendor/src/github.com/Xe/middleware/xff/examples/nethttp/main.go

@@ -0,0 +1,15 @@
+package main
+
+import (
+	"net/http"
+
+	"github.com/sebest/xff"
+)
+
+func main() {
+	handler := http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		w.Write([]byte("hello from " + r.RemoteAddr + "\n"))
+	})
+
+	http.ListenAndServe(":3000", xff.Handler(handler))
+}

vendor/src/github.com/Xe/middleware/xff/xff.go

@@ -0,0 +1,77 @@
+package xff
+
+import (
+	"net"
+	"net/http"
+	"strings"
+)
+
+var privateMasks = func() []net.IPNet {
+	masks := []net.IPNet{}
+	for _, cidr := range []string{"10.0.0.0/8", "172.16.0.0/12", "192.168.0.0/16", "fc00::/7"} {
+		_, net, err := net.ParseCIDR(cidr)
+		if err != nil {
+			panic(err)
+		}
+		masks = append(masks, *net)
+	}
+	return masks
+}()
+
+// IsPublicIP returns true if the given IP can be routed on the Internet
+func IsPublicIP(ip net.IP) bool {
+	if !ip.IsGlobalUnicast() {
+		return false
+	}
+	for _, mask := range privateMasks {
+		if mask.Contains(ip) {
+			return false
+		}
+	}
+	return true
+}
+
+// Parse parses the value of the X-Forwarded-For Header and returns the IP address.
+func Parse(ipList string) string {
+	for _, ip := range strings.Split(ipList, ",") {
+		ip = strings.TrimSpace(ip)
+		if IP := net.ParseIP(ip); IP != nil && IsPublicIP(IP) {
+			return ip
+		}
+	}
+	return ""
+}
+
+// GetRemoteAddr parses the given request, resolves the X-Forwarded-For header
+// and returns the resolved remote address.
+func GetRemoteAddr(r *http.Request) string {
+	xff := r.Header.Get("X-Forwarded-For")
+	var ip string
+	if xff != "" {
+		ip = Parse(xff)
+	}
+	_, oport, err := net.SplitHostPort(r.RemoteAddr)
+	if err == nil && ip != "" {
+		return net.JoinHostPort(ip, oport)
+	}
+	return r.RemoteAddr
+}
+
+// Handler is a middleware to update RemoteAdd from X-Fowarded-* Headers.
+func Handler(h http.Handler) http.Handler {
+	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		r.RemoteAddr = GetRemoteAddr(r)
+		h.ServeHTTP(w, r)
+	})
+}
+
+// HandlerFunc is a Martini compatible handler
+func HandlerFunc(w http.ResponseWriter, r *http.Request) {
+	r.RemoteAddr = GetRemoteAddr(r)
+}
+
+// XFF is a Negroni compatible interface
+func XFF(w http.ResponseWriter, r *http.Request, next http.HandlerFunc) {
+	r.RemoteAddr = GetRemoteAddr(r)
+	next(w, r)
+}

vendor/src/github.com/Xe/middleware/xff/xff_test.go

@@ -0,0 +1,67 @@
+package xff
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestParse_none(t *testing.T) {
+	res := Parse("")
+	assert.Equal(t, "", res)
+}
+
+func TestParse_localhost(t *testing.T) {
+	res := Parse("127.0.0.1")
+	assert.Equal(t, "", res)
+}
+
+func TestParse_invalid(t *testing.T) {
+	res := Parse("invalid")
+	assert.Equal(t, "", res)
+}
+
+func TestParse_invalid_sioux(t *testing.T) {
+	res := Parse("123#1#2#3")
+	assert.Equal(t, "", res)
+}
+
+func TestParse_invalid_private_lookalike(t *testing.T) {
+	res := Parse("102.3.2.1")
+	assert.Equal(t, "102.3.2.1", res)
+}
+
+func TestParse_valid(t *testing.T) {
+	res := Parse("68.45.152.220")
+	assert.Equal(t, "68.45.152.220", res)
+}
+
+func TestParse_multi_first(t *testing.T) {
+	res := Parse("12.13.14.15, 68.45.152.220")
+	assert.Equal(t, "12.13.14.15", res)
+}
+
+func TestParse_multi_last(t *testing.T) {
+	res := Parse("192.168.110.162, 190.57.149.90")
+	assert.Equal(t, "190.57.149.90", res)
+}
+
+func TestParse_multi_with_invalid(t *testing.T) {
+	res := Parse("192.168.110.162, invalid, 190.57.149.90")
+	assert.Equal(t, "190.57.149.90", res)
+}
+
+func TestParse_multi_with_invalid2(t *testing.T) {
+	res := Parse("192.168.110.162, 190.57.149.90, invalid")
+	assert.Equal(t, "190.57.149.90", res)
+}
+
+func TestParse_multi_with_invalid_sioux(t *testing.T) {
+	res := Parse("192.168.110.162, 190.57.149.90, 123#1#2#3")
+	assert.Equal(t, "190.57.149.90", res)
+}
+
+func TestParse_ipv6_with_port(t *testing.T) {
+	res := Parse("2604:2000:71a9:bf00:f178:a500:9a2d:670d")
+	assert.Equal(t, "2604:2000:71a9:bf00:f178:a500:9a2d:670d", res)
+}

vendor/src/github.com/Xe/middleware/xrequestid/LICENSE

@@ -0,0 +1,22 @@
+The MIT License (MIT)
+
+Copyright (c) 2014 Andrea Franz (http://gravityblast.com)
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
+

vendor/src/github.com/Xe/middleware/xrequestid/Makefile

@@ -0,0 +1,10 @@
+GO_CMD=go
+GOLINT_CMD=golint
+GO_TEST=$(GO_CMD) test -v ./...
+GO_VET=$(GO_CMD) vet ./...
+GO_LINT=$(GOLINT_CMD) ./...
+
+all:
+	$(GO_VET)
+	$(GO_LINT)
+	$(GO_TEST)

vendor/src/github.com/Xe/middleware/xrequestid/README.md

@@ -0,0 +1,5 @@
+# xrequestid
+
+> Package xrequestid implements an http middleware for Negroni that assigns a random id to each request. It's written in the Go programming language.
+
+Docs at http://godoc.org/github.com/pilu/xrequestid

vendor/src/github.com/Xe/middleware/xrequestid/xrequestid_middleware.go

@@ -0,0 +1,76 @@
+// Package xrequestid implements an http middleware for Negroni that assigns a random id to each request
+//
+// Example:
+//		package main
+//
+//		import (
+//			"fmt"
+//			"net/http"
+//
+//			"github.com/codegangsta/negroni"
+//			"github.com/pilu/xrequestid"
+//		)
+//
+//		func main() {
+//			mux := http.NewServeMux()
+//			mux.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
+//				fmt.Fprintf(w, "X-Request-Id is `%s`", r.Header.Get("X-Request-Id"))
+//			})
+//
+//			n := negroni.New()
+//			n.Use(xrequestid.New(16))
+//			n.UseHandler(mux)
+//			n.Run(":3000")
+//		}
+package xrequestid
+
+import (
+	"crypto/rand"
+	"encoding/hex"
+	"net/http"
+)
+
+// By default the middleware set the generated random string to this key in the request header
+const DefaultHeaderKey = "X-Request-Id"
+
+// GenerateFunc is the func used by the middleware to generates the random string.
+type GenerateFunc func(int) (string, error)
+
+// XRequestID is a middleware that adds a random ID to the request X-Request-Id header
+type XRequestID struct {
+	// Size specifies the length of the random length. The length of the result string is twice of n.
+	Size int
+	// Generate is a GenerateFunc that generates the random string. The default one uses crypto/rand
+	Generate GenerateFunc
+	// HeaderKey is the header name where the middleware set the random string. By default it uses the DefaultHeaderKey constant value
+	HeaderKey string
+}
+
+// New returns a new XRequestID middleware instance. n specifies the length of the random length. The length of the result string is twice of n.
+func New(n int) *XRequestID {
+	return &XRequestID{
+		Size:      n,
+		Generate:  generateID,
+		HeaderKey: DefaultHeaderKey,
+	}
+}
+
+func (m *XRequestID) ServeHTTP(rw http.ResponseWriter, r *http.Request, next http.HandlerFunc) {
+	id, err := m.Generate(m.Size)
+	if err == nil {
+		r.Header.Set(m.HeaderKey, id)
+		rw.Header().Set(m.HeaderKey, id)
+	}
+
+	next(rw, r)
+}
+
+func generateID(n int) (string, error) {
+	r := make([]byte, n)
+	_, err := rand.Read(r)
+	if err != nil {
+		return "", err
+	}
+
+	return hex.EncodeToString(r), nil
+}

vendor/src/github.com/Xe/middleware/xrequestid/xrequestid_middleware_test.go

@@ -0,0 +1,20 @@
+package xrequestid
+
+import (
+	"net/http"
+	"net/http/httptest"
+	"testing"
+)
+
+func TestXRequestID(t *testing.T) {
+	recorder := httptest.NewRecorder()
+	req, _ := http.NewRequest("GET", "/", nil)
+
+	middleware := New(16)
+	middleware.Generate = func(n int) (string, error) { return "test-id", nil }
+	middleware.ServeHTTP(recorder, req, func(w http.ResponseWriter, r *http.Request) {})
+
+	if id := req.Header.Get("X-Request-ID"); id != "test-id" {
+		t.Fatalf("Expected X-Request-Id to be `test-id`, got `%v`", id)
+	}
+}

vendor/src/github.com/codegangsta/negroni/LICENSE

@@ -0,0 +1,21 @@
+The MIT License (MIT)
+
+Copyright (c) 2014 Jeremy Saenz
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

vendor/src/github.com/codegangsta/negroni/README.md

@@ -0,0 +1,181 @@
+# Negroni [![GoDoc](https://godoc.org/github.com/codegangsta/negroni?status.svg)](http://godoc.org/github.com/codegangsta/negroni) [![wercker status](https://app.wercker.com/status/13688a4a94b82d84a0b8d038c4965b61/s "wercker status")](https://app.wercker.com/project/bykey/13688a4a94b82d84a0b8d038c4965b61)
+
+Negroni is an idiomatic approach to web middleware in Go. It is tiny, non-intrusive, and encourages use of `net/http` Handlers.
+
+If you like the idea of [Martini](http://github.com/go-martini/martini), but you think it contains too much magic, then Negroni is a great fit.
+
+
+Language Translations:
+* [Português Brasileiro (pt_BR)](translations/README_pt_br.md)
+
+## Getting Started
+
+After installing Go and setting up your [GOPATH](http://golang.org/doc/code.html#GOPATH), create your first `.go` file. We'll call it `server.go`.
+
+~~~ go
+package main
+
+import (
+  "github.com/codegangsta/negroni"
+  "net/http"
+  "fmt"
+)
+
+func main() {
+  mux := http.NewServeMux()
+  mux.HandleFunc("/", func(w http.ResponseWriter, req *http.Request) {
+    fmt.Fprintf(w, "Welcome to the home page!")
+  })
+
+  n := negroni.Classic()
+  n.UseHandler(mux)
+  n.Run(":3000")
+}
+~~~
+
+Then install the Negroni package (**go 1.1** and greater is required):
+~~~
+go get github.com/codegangsta/negroni
+~~~
+
+Then run your server:
+~~~
+go run server.go
+~~~
+
+You will now have a Go net/http webserver running on `localhost:3000`.
+
+## Need Help?
+If you have a question or feature request, [go ask the mailing list](https://groups.google.com/forum/#!forum/negroni-users). The GitHub issues for Negroni will be used exclusively for bug reports and pull requests.
+
+## Is Negroni a Framework?
+Negroni is **not** a framework. It is a library that is designed to work directly with net/http.
+
+## Routing?
+Negroni is BYOR (Bring your own Router). The Go community already has a number of great http routers available, Negroni tries to play well with all of them by fully supporting `net/http`. For instance, integrating with [Gorilla Mux](http://github.com/gorilla/mux) looks like so:
+
+~~~ go
+router := mux.NewRouter()
+router.HandleFunc("/", HomeHandler)
+
+n := negroni.New(Middleware1, Middleware2)
+// Or use a middleware with the Use() function
+n.Use(Middleware3)
+// router goes last
+n.UseHandler(router)
+
+n.Run(":3000")
+~~~
+
+## `negroni.Classic()`
+`negroni.Classic()` provides some default middleware that is useful for most applications:
+
+* `negroni.Recovery` - Panic Recovery Middleware.
+* `negroni.Logging` - Request/Response Logging Middleware.
+* `negroni.Static` - Static File serving under the "public" directory.
+
+This makes it really easy to get started with some useful features from Negroni.
+
+## Handlers
+Negroni provides a bidirectional middleware flow. This is done through the `negroni.Handler` interface:
+
+~~~ go
+type Handler interface {
+  ServeHTTP(rw http.ResponseWriter, r *http.Request, next http.HandlerFunc)
+}
+~~~
+
+If a middleware hasn't already written to the ResponseWriter, it should call the next `http.HandlerFunc` in the chain to yield to the next middleware handler. This can be used for great good:
+
+~~~ go
+func MyMiddleware(rw http.ResponseWriter, r *http.Request, next http.HandlerFunc) {
+  // do some stuff before
+  next(rw, r)
+  // do some stuff after
+}
+~~~
+
+And you can map it to the handler chain with the `Use` function:
+
+~~~ go
+n := negroni.New()
+n.Use(negroni.HandlerFunc(MyMiddleware))
+~~~
+
+You can also map plain old `http.Handler`s:
+
+~~~ go
+n := negroni.New()
+
+mux := http.NewServeMux()
+// map your routes
+
+n.UseHandler(mux)
+
+n.Run(":3000")
+~~~
+
+## `Run()`
+Negroni has a convenience function called `Run`. `Run` takes an addr string identical to [http.ListenAndServe](http://golang.org/pkg/net/http#ListenAndServe).
+
+~~~ go
+n := negroni.Classic()
+// ...
+log.Fatal(http.ListenAndServe(":8080", n))
+~~~
+
+## Route Specific Middleware
+If you have a route group of routes that need specific middleware to be executed, you can simply create a new Negroni instance and use it as your route handler.
+
+~~~ go
+router := mux.NewRouter()
+adminRoutes := mux.NewRouter()
+// add admin routes here
+
+// Create a new negroni for the admin middleware
+router.Handle("/admin", negroni.New(
+  Middleware1,
+  Middleware2,
+  negroni.Wrap(adminRoutes),
+))
+~~~
+
+## Third Party Middleware
+
+Here is a current list of Negroni compatible middlware. Feel free to put up a PR linking your middleware if you have built one:
+
+
+| Middleware | Author | Description |
+| -----------|--------|-------------|
+| [RestGate](https://github.com/pjebs/restgate) | [Prasanga Siripala](https://github.com/pjebs) | Secure authentication for REST API endpoints |
+| [Graceful](https://github.com/stretchr/graceful) | [Tyler Bunnell](https://github.com/tylerb) | Graceful HTTP Shutdown |
+| [secure](https://github.com/unrolled/secure) | [Cory Jacobsen](https://github.com/unrolled) | Middleware that implements a few quick security wins |
+| [JWT Middleware](https://github.com/auth0/go-jwt-middleware) | [Auth0](https://github.com/auth0) | Middleware checks for a JWT on the `Authorization` header on incoming requests and decodes it|
+| [binding](https://github.com/mholt/binding) | [Matt Holt](https://github.com/mholt) | Data binding from HTTP requests into structs |
+| [logrus](https://github.com/meatballhat/negroni-logrus) | [Dan Buch](https://github.com/meatballhat) | Logrus-based logger |
+| [render](https://github.com/unrolled/render) | [Cory Jacobsen](https://github.com/unrolled) | Render JSON, XML and HTML templates |
+| [gorelic](https://github.com/jingweno/negroni-gorelic) | [Jingwen Owen Ou](https://github.com/jingweno) | New Relic agent for Go runtime |
+| [gzip](https://github.com/phyber/negroni-gzip) | [phyber](https://github.com/phyber) | GZIP response compression |
+| [oauth2](https://github.com/goincremental/negroni-oauth2) | [David Bochenski](https://github.com/bochenski) | oAuth2 middleware |
+| [sessions](https://github.com/goincremental/negroni-sessions) | [David Bochenski](https://github.com/bochenski) | Session Management |
+| [permissions2](https://github.com/xyproto/permissions2) | [Alexander Rødseth](https://github.com/xyproto) | Cookies, users and permissions |
+| [onthefly](https://github.com/xyproto/onthefly) | [Alexander Rødseth](https://github.com/xyproto) | Generate TinySVG, HTML and CSS on the fly |
+| [cors](https://github.com/rs/cors) | [Olivier Poitrey](https://github.com/rs) | [Cross Origin Resource Sharing](http://www.w3.org/TR/cors/) (CORS) support |
+| [xrequestid](https://github.com/pilu/xrequestid) | [Andrea Franz](https://github.com/pilu) | Middleware that assigns a random X-Request-Id header to each request |
+| [VanGoH](https://github.com/auroratechnologies/vangoh) | [Taylor Wrobel](https://github.com/twrobel3) | Configurable [AWS-Style](http://docs.aws.amazon.com/AmazonS3/latest/dev/RESTAuthentication.html) HMAC authentication middleware |
+| [stats](https://github.com/thoas/stats) | [Florent Messa](https://github.com/thoas) | Store information about your web application (response time, etc.) |
+
+## Examples
+[Alexander Rødseth](https://github.com/xyproto) created [mooseware](https://github.com/xyproto/mooseware), a skeleton for writing a Negroni middleware handler.
+
+## Live code reload?
+[gin](https://github.com/codegangsta/gin) and [fresh](https://github.com/pilu/fresh) both live reload negroni apps.
+
+## Essential Reading for Beginners of Go & Negroni
+
+* [Using a Context to pass information from middleware to end handler](http://elithrar.github.io/article/map-string-interface/)
+* [Understanding middleware](http://mattstauffer.co/blog/laravel-5.0-middleware-replacing-filters)
+
+## About
+
+Negroni is obsessively designed by none other than the [Code Gangsta](http://codegangsta.io/)

vendor/src/github.com/codegangsta/negroni/doc.go

@@ -0,0 +1,25 @@
+// Package negroni is an idiomatic approach to web middleware in Go. It is tiny, non-intrusive, and encourages use of net/http Handlers.
+//
+// If you like the idea of Martini, but you think it contains too much magic, then Negroni is a great fit.
+//
+// For a full guide visit http://github.com/codegangsta/negroni
+//
+//  package main
+//
+//  import (
+//    "github.com/codegangsta/negroni"
+//    "net/http"
+//    "fmt"
+//  )
+//
+//  func main() {
+//    mux := http.NewServeMux()
+//    mux.HandleFunc("/", func(w http.ResponseWriter, req *http.Request) {
+//      fmt.Fprintf(w, "Welcome to the home page!")
+//    })
+//
+//    n := negroni.Classic()
+//    n.UseHandler(mux)
+//    n.Run(":3000")
+//  }
+package negroni

vendor/src/github.com/codegangsta/negroni/logger.go

@@ -0,0 +1,29 @@
+package negroni
+
+import (
+	"log"
+	"net/http"
+	"os"
+	"time"
+)
+
+// Logger is a middleware handler that logs the request as it goes in and the response as it goes out.
+type Logger struct {
+	// Logger inherits from log.Logger used to log messages with the Logger middleware
+	*log.Logger
+}
+
+// NewLogger returns a new Logger instance
+func NewLogger() *Logger {
+	return &Logger{log.New(os.Stdout, "[negroni] ", 0)}
+}
+
+func (l *Logger) ServeHTTP(rw http.ResponseWriter, r *http.Request, next http.HandlerFunc) {
+	start := time.Now()
+	l.Printf("Started %s %s", r.Method, r.URL.Path)
+
+	next(rw, r)
+
+	res := rw.(ResponseWriter)
+	l.Printf("Completed %v %s in %v", res.Status(), http.StatusText(res.Status()), time.Since(start))
+}

vendor/src/github.com/codegangsta/negroni/logger_test.go

@@ -0,0 +1,33 @@
+package negroni
+
+import (
+	"bytes"
+	"log"
+	"net/http"
+	"net/http/httptest"
+	"testing"
+)
+
+func Test_Logger(t *testing.T) {
+	buff := bytes.NewBufferString("")
+	recorder := httptest.NewRecorder()
+
+	l := NewLogger()
+	l.Logger = log.New(buff, "[negroni] ", 0)
+
+	n := New()
+	// replace log for testing
+	n.Use(l)
+	n.UseHandler(http.HandlerFunc(func(rw http.ResponseWriter, r *http.Request) {
+		rw.WriteHeader(http.StatusNotFound)
+	}))
+
+	req, err := http.NewRequest("GET", "http://localhost:3000/foobar", nil)
+	if err != nil {
+		t.Error(err)
+	}
+
+	n.ServeHTTP(recorder, req)
+	expect(t, recorder.Code, http.StatusNotFound)
+	refute(t, len(buff.String()), 0)
+}

vendor/src/github.com/codegangsta/negroni/negroni.go

@@ -0,0 +1,129 @@
+package negroni
+
+import (
+	"log"
+	"net/http"
+	"os"
+)
+
+// Handler handler is an interface that objects can implement to be registered to serve as middleware
+// in the Negroni middleware stack.
+// ServeHTTP should yield to the next middleware in the chain by invoking the next http.HandlerFunc
+// passed in.
+//
+// If the Handler writes to the ResponseWriter, the next http.HandlerFunc should not be invoked.
+type Handler interface {
+	ServeHTTP(rw http.ResponseWriter, r *http.Request, next http.HandlerFunc)
+}
+
+// HandlerFunc is an adapter to allow the use of ordinary functions as Negroni handlers.
+// If f is a function with the appropriate signature, HandlerFunc(f) is a Handler object that calls f.
+type HandlerFunc func(rw http.ResponseWriter, r *http.Request, next http.HandlerFunc)
+
+func (h HandlerFunc) ServeHTTP(rw http.ResponseWriter, r *http.Request, next http.HandlerFunc) {
+	h(rw, r, next)
+}
+
+type middleware struct {
+	handler Handler
+	next    *middleware
+}
+
+func (m middleware) ServeHTTP(rw http.ResponseWriter, r *http.Request) {
+	m.handler.ServeHTTP(rw, r, m.next.ServeHTTP)
+}
+
+// Wrap converts a http.Handler into a negroni.Handler so it can be used as a Negroni
+// middleware. The next http.HandlerFunc is automatically called after the Handler
+// is executed.
+func Wrap(handler http.Handler) Handler {
+	return HandlerFunc(func(rw http.ResponseWriter, r *http.Request, next http.HandlerFunc) {
+		handler.ServeHTTP(rw, r)
+		next(rw, r)
+	})
+}
+
+// Negroni is a stack of Middleware Handlers that can be invoked as an http.Handler.
+// Negroni middleware is evaluated in the order that they are added to the stack using
+// the Use and UseHandler methods.
+type Negroni struct {
+	middleware middleware
+	handlers   []Handler
+}
+
+// New returns a new Negroni instance with no middleware preconfigured.
+func New(handlers ...Handler) *Negroni {
+	return &Negroni{
+		handlers:   handlers,
+		middleware: build(handlers),
+	}
+}
+
+// Classic returns a new Negroni instance with the default middleware already
+// in the stack.
+//
+// Recovery - Panic Recovery Middleware
+// Logger - Request/Response Logging
+// Static - Static File Serving
+func Classic() *Negroni {
+	return New(NewRecovery(), NewLogger(), NewStatic(http.Dir("public")))
+}
+
+func (n *Negroni) ServeHTTP(rw http.ResponseWriter, r *http.Request) {
+	n.middleware.ServeHTTP(NewResponseWriter(rw), r)
+}
+
+// Use adds a Handler onto the middleware stack. Handlers are invoked in the order they are added to a Negroni.
+func (n *Negroni) Use(handler Handler) {
+	n.handlers = append(n.handlers, handler)
+	n.middleware = build(n.handlers)
+}
+
+// UseFunc adds a Negroni-style handler function onto the middleware stack.
+func (n *Negroni) UseFunc(handlerFunc func(rw http.ResponseWriter, r *http.Request, next http.HandlerFunc)) {
+	n.Use(HandlerFunc(handlerFunc))
+}
+
+// UseHandler adds a http.Handler onto the middleware stack. Handlers are invoked in the order they are added to a Negroni.
+func (n *Negroni) UseHandler(handler http.Handler) {
+	n.Use(Wrap(handler))
+}
+
+// UseHandler adds a http.HandlerFunc-style handler function onto the middleware stack.
+func (n *Negroni) UseHandlerFunc(handlerFunc func(rw http.ResponseWriter, r *http.Request)) {
+	n.UseHandler(http.HandlerFunc(handlerFunc))
+}
+
+// Run is a convenience function that runs the negroni stack as an HTTP
+// server. The addr string takes the same format as http.ListenAndServe.
+func (n *Negroni) Run(addr string) {
+	l := log.New(os.Stdout, "[negroni] ", 0)
+	l.Printf("listening on %s", addr)
+	l.Fatal(http.ListenAndServe(addr, n))
+}
+
+// Returns a list of all the handlers in the current Negroni middleware chain.
+func (n *Negroni) Handlers() []Handler {
+	return n.handlers
+}
+
+func build(handlers []Handler) middleware {
+	var next middleware
+
+	if len(handlers) == 0 {
+		return voidMiddleware()
+	} else if len(handlers) > 1 {
+		next = build(handlers[1:])
+	} else {
+		next = voidMiddleware()
+	}
+
+	return middleware{handlers[0], &next}
+}
+
+func voidMiddleware() middleware {
+	return middleware{
+		HandlerFunc(func(rw http.ResponseWriter, r *http.Request, next http.HandlerFunc) {}),
+		&middleware{},
+	}
+}

vendor/src/github.com/codegangsta/negroni/negroni_test.go

@@ -0,0 +1,75 @@
+package negroni
+
+import (
+	"net/http"
+	"net/http/httptest"
+	"reflect"
+	"testing"
+)
+
+/* Test Helpers */
+func expect(t *testing.T, a interface{}, b interface{}) {
+	if a != b {
+		t.Errorf("Expected %v (type %v) - Got %v (type %v)", b, reflect.TypeOf(b), a, reflect.TypeOf(a))
+	}
+}
+
+func refute(t *testing.T, a interface{}, b interface{}) {
+	if a == b {
+		t.Errorf("Did not expect %v (type %v) - Got %v (type %v)", b, reflect.TypeOf(b), a, reflect.TypeOf(a))
+	}
+}
+
+func TestNegroniRun(t *testing.T) {
+	// just test that Run doesn't bomb
+	go New().Run(":3000")
+}
+
+func TestNegroniServeHTTP(t *testing.T) {
+	result := ""
+	response := httptest.NewRecorder()
+
+	n := New()
+	n.Use(HandlerFunc(func(rw http.ResponseWriter, r *http.Request, next http.HandlerFunc) {
+		result += "foo"
+		next(rw, r)
+		result += "ban"
+	}))
+	n.Use(HandlerFunc(func(rw http.ResponseWriter, r *http.Request, next http.HandlerFunc) {
+		result += "bar"
+		next(rw, r)
+		result += "baz"
+	}))
+	n.Use(HandlerFunc(func(rw http.ResponseWriter, r *http.Request, next http.HandlerFunc) {
+		result += "bat"
+		rw.WriteHeader(http.StatusBadRequest)
+	}))
+
+	n.ServeHTTP(response, (*http.Request)(nil))
+
+	expect(t, result, "foobarbatbazban")
+	expect(t, response.Code, http.StatusBadRequest)
+}
+
+// Ensures that a Negroni middleware chain 
+// can correctly return all of its handlers.
+func TestHandlers(t *testing.T) {
+	response := httptest.NewRecorder()
+	n := New()
+	handlers := n.Handlers()
+	expect(t, 0, len(handlers))
+
+	n.Use(HandlerFunc(func(rw http.ResponseWriter, r *http.Request, next http.HandlerFunc) {
+		rw.WriteHeader(http.StatusOK)
+	}))
+
+	// Expects the length of handlers to be exactly 1 
+	// after adding exactly one handler to the middleware chain
+	handlers = n.Handlers()
+	expect(t, 1, len(handlers))
+
+	// Ensures that the first handler that is in sequence behaves
+	// exactly the same as the one that was registered earlier
+	handlers[0].ServeHTTP(response, (*http.Request)(nil), nil)
+	expect(t, response.Code, http.StatusOK)
+}

vendor/src/github.com/codegangsta/negroni/recovery.go

@@ -0,0 +1,46 @@
+package negroni
+
+import (
+	"fmt"
+	"log"
+	"net/http"
+	"os"
+	"runtime"
+)
+
+// Recovery is a Negroni middleware that recovers from any panics and writes a 500 if there was one.
+type Recovery struct {
+	Logger     *log.Logger
+	PrintStack bool
+	StackAll   bool
+	StackSize  int
+}
+
+// NewRecovery returns a new instance of Recovery
+func NewRecovery() *Recovery {
+	return &Recovery{
+		Logger:     log.New(os.Stdout, "[negroni] ", 0),
+		PrintStack: true,
+		StackAll:   false,
+		StackSize:  1024 * 8,
+	}
+}
+
+func (rec *Recovery) ServeHTTP(rw http.ResponseWriter, r *http.Request, next http.HandlerFunc) {
+	defer func() {
+		if err := recover(); err != nil {
+			rw.WriteHeader(http.StatusInternalServerError)
+			stack := make([]byte, rec.StackSize)
+			stack = stack[:runtime.Stack(stack, rec.StackAll)]
+
+			f := "PANIC: %s\n%s"
+			rec.Logger.Printf(f, err, stack)
+
+			if rec.PrintStack {
+				fmt.Fprintf(rw, f, err, stack)
+			}
+		}
+	}()
+
+	next(rw, r)
+}

vendor/src/github.com/codegangsta/negroni/recovery_test.go

@@ -0,0 +1,28 @@
+package negroni
+
+import (
+	"bytes"
+	"log"
+	"net/http"
+	"net/http/httptest"
+	"testing"
+)
+
+func TestRecovery(t *testing.T) {
+	buff := bytes.NewBufferString("")
+	recorder := httptest.NewRecorder()
+
+	rec := NewRecovery()
+	rec.Logger = log.New(buff, "[negroni] ", 0)
+
+	n := New()
+	// replace log for testing
+	n.Use(rec)
+	n.UseHandler(http.HandlerFunc(func(res http.ResponseWriter, req *http.Request) {
+		panic("here is a panic!")
+	}))
+	n.ServeHTTP(recorder, (*http.Request)(nil))
+	expect(t, recorder.Code, http.StatusInternalServerError)
+	refute(t, recorder.Body.Len(), 0)
+	refute(t, len(buff.String()), 0)
+}

vendor/src/github.com/codegangsta/negroni/response_writer.go

@@ -0,0 +1,96 @@
+package negroni
+
+import (
+	"bufio"
+	"fmt"
+	"net"
+	"net/http"
+)
+
+// ResponseWriter is a wrapper around http.ResponseWriter that provides extra information about
+// the response. It is recommended that middleware handlers use this construct to wrap a responsewriter
+// if the functionality calls for it.
+type ResponseWriter interface {
+	http.ResponseWriter
+	http.Flusher
+	// Status returns the status code of the response or 0 if the response has not been written.
+	Status() int
+	// Written returns whether or not the ResponseWriter has been written.
+	Written() bool
+	// Size returns the size of the response body.
+	Size() int
+	// Before allows for a function to be called before the ResponseWriter has been written to. This is
+	// useful for setting headers or any other operations that must happen before a response has been written.
+	Before(func(ResponseWriter))
+}
+
+type beforeFunc func(ResponseWriter)
+
+// NewResponseWriter creates a ResponseWriter that wraps an http.ResponseWriter
+func NewResponseWriter(rw http.ResponseWriter) ResponseWriter {
+	return &responseWriter{rw, 0, 0, nil}
+}
+
+type responseWriter struct {
+	http.ResponseWriter
+	status      int
+	size        int
+	beforeFuncs []beforeFunc
+}
+
+func (rw *responseWriter) WriteHeader(s int) {
+	rw.status = s
+	rw.callBefore()
+	rw.ResponseWriter.WriteHeader(s)
+}
+
+func (rw *responseWriter) Write(b []byte) (int, error) {
+	if !rw.Written() {
+		// The status will be StatusOK if WriteHeader has not been called yet
+		rw.WriteHeader(http.StatusOK)
+	}
+	size, err := rw.ResponseWriter.Write(b)
+	rw.size += size
+	return size, err
+}
+
+func (rw *responseWriter) Status() int {
+	return rw.status
+}
+
+func (rw *responseWriter) Size() int {
+	return rw.size
+}
+
+func (rw *responseWriter) Written() bool {
+	return rw.status != 0
+}
+
+func (rw *responseWriter) Before(before func(ResponseWriter)) {
+	rw.beforeFuncs = append(rw.beforeFuncs, before)
+}
+
+func (rw *responseWriter) Hijack() (net.Conn, *bufio.ReadWriter, error) {
+	hijacker, ok := rw.ResponseWriter.(http.Hijacker)
+	if !ok {
+		return nil, nil, fmt.Errorf("the ResponseWriter doesn't support the Hijacker interface")
+	}
+	return hijacker.Hijack()
+}
+
+func (rw *responseWriter) CloseNotify() <-chan bool {
+	return rw.ResponseWriter.(http.CloseNotifier).CloseNotify()
+}
+
+func (rw *responseWriter) callBefore() {
+	for i := len(rw.beforeFuncs) - 1; i >= 0; i-- {
+		rw.beforeFuncs[i](rw)
+	}
+}
+
+func (rw *responseWriter) Flush() {
+	flusher, ok := rw.ResponseWriter.(http.Flusher)
+	if ok {
+		flusher.Flush()
+	}
+}

vendor/src/github.com/codegangsta/negroni/response_writer_test.go

@@ -0,0 +1,150 @@
+package negroni
+
+import (
+	"bufio"
+	"net"
+	"net/http"
+	"net/http/httptest"
+	"testing"
+	"time"
+)
+
+type closeNotifyingRecorder struct {
+	*httptest.ResponseRecorder
+	closed chan bool
+}
+
+func newCloseNotifyingRecorder() *closeNotifyingRecorder {
+	return &closeNotifyingRecorder{
+		httptest.NewRecorder(),
+		make(chan bool, 1),
+	}
+}
+
+func (c *closeNotifyingRecorder) close() {
+	c.closed <- true
+}
+
+func (c *closeNotifyingRecorder) CloseNotify() <-chan bool {
+	return c.closed
+}
+
+type hijackableResponse struct {
+	Hijacked bool
+}
+
+func newHijackableResponse() *hijackableResponse {
+	return &hijackableResponse{}
+}
+
+func (h *hijackableResponse) Header() http.Header           { return nil }
+func (h *hijackableResponse) Write(buf []byte) (int, error) { return 0, nil }
+func (h *hijackableResponse) WriteHeader(code int)          {}
+func (h *hijackableResponse) Flush()                        {}
+func (h *hijackableResponse) Hijack() (net.Conn, *bufio.ReadWriter, error) {
+	h.Hijacked = true
+	return nil, nil, nil
+}
+
+func TestResponseWriterWritingString(t *testing.T) {
+	rec := httptest.NewRecorder()
+	rw := NewResponseWriter(rec)
+
+	rw.Write([]byte("Hello world"))
+
+	expect(t, rec.Code, rw.Status())
+	expect(t, rec.Body.String(), "Hello world")
+	expect(t, rw.Status(), http.StatusOK)
+	expect(t, rw.Size(), 11)
+	expect(t, rw.Written(), true)
+}
+
+func TestResponseWriterWritingStrings(t *testing.T) {
+	rec := httptest.NewRecorder()
+	rw := NewResponseWriter(rec)
+
+	rw.Write([]byte("Hello world"))
+	rw.Write([]byte("foo bar bat baz"))
+
+	expect(t, rec.Code, rw.Status())
+	expect(t, rec.Body.String(), "Hello worldfoo bar bat baz")
+	expect(t, rw.Status(), http.StatusOK)
+	expect(t, rw.Size(), 26)
+}
+
+func TestResponseWriterWritingHeader(t *testing.T) {
+	rec := httptest.NewRecorder()
+	rw := NewResponseWriter(rec)
+
+	rw.WriteHeader(http.StatusNotFound)
+
+	expect(t, rec.Code, rw.Status())
+	expect(t, rec.Body.String(), "")
+	expect(t, rw.Status(), http.StatusNotFound)
+	expect(t, rw.Size(), 0)
+}
+
+func TestResponseWriterBefore(t *testing.T) {
+	rec := httptest.NewRecorder()
+	rw := NewResponseWriter(rec)
+	result := ""
+
+	rw.Before(func(ResponseWriter) {
+		result += "foo"
+	})
+	rw.Before(func(ResponseWriter) {
+		result += "bar"
+	})
+
+	rw.WriteHeader(http.StatusNotFound)
+
+	expect(t, rec.Code, rw.Status())
+	expect(t, rec.Body.String(), "")
+	expect(t, rw.Status(), http.StatusNotFound)
+	expect(t, rw.Size(), 0)
+	expect(t, result, "barfoo")
+}
+
+func TestResponseWriterHijack(t *testing.T) {
+	hijackable := newHijackableResponse()
+	rw := NewResponseWriter(hijackable)
+	hijacker, ok := rw.(http.Hijacker)
+	expect(t, ok, true)
+	_, _, err := hijacker.Hijack()
+	if err != nil {
+		t.Error(err)
+	}
+	expect(t, hijackable.Hijacked, true)
+}
+
+func TestResponseWriteHijackNotOK(t *testing.T) {
+	hijackable := new(http.ResponseWriter)
+	rw := NewResponseWriter(*hijackable)
+	hijacker, ok := rw.(http.Hijacker)
+	expect(t, ok, true)
+	_, _, err := hijacker.Hijack()
+
+	refute(t, err, nil)
+}
+
+func TestResponseWriterCloseNotify(t *testing.T) {
+	rec := newCloseNotifyingRecorder()
+	rw := NewResponseWriter(rec)
+	closed := false
+	notifier := rw.(http.CloseNotifier).CloseNotify()
+	rec.close()
+	select {
+	case <-notifier:
+		closed = true
+	case <-time.After(time.Second):
+	}
+	expect(t, closed, true)
+}
+
+func TestResponseWriterFlusher(t *testing.T) {
+	rec := httptest.NewRecorder()
+	rw := NewResponseWriter(rec)
+
+	_, ok := rw.(http.Flusher)
+	expect(t, ok, true)
+}

vendor/src/github.com/codegangsta/negroni/static.go

@@ -0,0 +1,84 @@
+package negroni
+
+import (
+	"net/http"
+	"path"
+	"strings"
+)
+
+// Static is a middleware handler that serves static files in the given directory/filesystem.
+type Static struct {
+	// Dir is the directory to serve static files from
+	Dir http.FileSystem
+	// Prefix is the optional prefix used to serve the static directory content
+	Prefix string
+	// IndexFile defines which file to serve as index if it exists.
+	IndexFile string
+}
+
+// NewStatic returns a new instance of Static
+func NewStatic(directory http.FileSystem) *Static {
+	return &Static{
+		Dir:       directory,
+		Prefix:    "",
+		IndexFile: "index.html",
+	}
+}
+
+func (s *Static) ServeHTTP(rw http.ResponseWriter, r *http.Request, next http.HandlerFunc) {
+	if r.Method != "GET" && r.Method != "HEAD" {
+		next(rw, r)
+		return
+	}
+	file := r.URL.Path
+	// if we have a prefix, filter requests by stripping the prefix
+	if s.Prefix != "" {
+		if !strings.HasPrefix(file, s.Prefix) {
+			next(rw, r)
+			return
+		}
+		file = file[len(s.Prefix):]
+		if file != "" && file[0] != '/' {
+			next(rw, r)
+			return
+		}
+	}
+	f, err := s.Dir.Open(file)
+	if err != nil {
+		// discard the error?
+		next(rw, r)
+		return
+	}
+	defer f.Close()
+
+	fi, err := f.Stat()
+	if err != nil {
+		next(rw, r)
+		return
+	}
+
+	// try to serve index file
+	if fi.IsDir() {
+		// redirect if missing trailing slash
+		if !strings.HasSuffix(r.URL.Path, "/") {
+			http.Redirect(rw, r, r.URL.Path+"/", http.StatusFound)
+			return
+		}
+
+		file = path.Join(file, s.IndexFile)
+		f, err = s.Dir.Open(file)
+		if err != nil {
+			next(rw, r)
+			return
+		}
+		defer f.Close()
+
+		fi, err = f.Stat()
+		if err != nil || fi.IsDir() {
+			next(rw, r)
+			return
+		}
+	}
+
+	http.ServeContent(rw, r, file, fi.ModTime(), f)
+}

vendor/src/github.com/codegangsta/negroni/static_test.go

@@ -0,0 +1,113 @@
+package negroni
+
+import (
+	"bytes"
+	"net/http"
+	"net/http/httptest"
+	"testing"
+)
+
+func TestStatic(t *testing.T) {
+	response := httptest.NewRecorder()
+	response.Body = new(bytes.Buffer)
+
+	n := New()
+	n.Use(NewStatic(http.Dir(".")))
+
+	req, err := http.NewRequest("GET", "http://localhost:3000/negroni.go", nil)
+	if err != nil {
+		t.Error(err)
+	}
+	n.ServeHTTP(response, req)
+	expect(t, response.Code, http.StatusOK)
+	expect(t, response.Header().Get("Expires"), "")
+	if response.Body.Len() == 0 {
+		t.Errorf("Got empty body for GET request")
+	}
+}
+
+func TestStaticHead(t *testing.T) {
+	response := httptest.NewRecorder()
+	response.Body = new(bytes.Buffer)
+
+	n := New()
+	n.Use(NewStatic(http.Dir(".")))
+	n.UseHandler(http.NotFoundHandler())
+
+	req, err := http.NewRequest("HEAD", "http://localhost:3000/negroni.go", nil)
+	if err != nil {
+		t.Error(err)
+	}
+
+	n.ServeHTTP(response, req)
+	expect(t, response.Code, http.StatusOK)
+	if response.Body.Len() != 0 {
+		t.Errorf("Got non-empty body for HEAD request")
+	}
+}
+
+func TestStaticAsPost(t *testing.T) {
+	response := httptest.NewRecorder()
+
+	n := New()
+	n.Use(NewStatic(http.Dir(".")))
+	n.UseHandler(http.NotFoundHandler())
+
+	req, err := http.NewRequest("POST", "http://localhost:3000/negroni.go", nil)
+	if err != nil {
+		t.Error(err)
+	}
+
+	n.ServeHTTP(response, req)
+	expect(t, response.Code, http.StatusNotFound)
+}
+
+func TestStaticBadDir(t *testing.T) {
+	response := httptest.NewRecorder()
+
+	n := Classic()
+	n.UseHandler(http.NotFoundHandler())
+
+	req, err := http.NewRequest("GET", "http://localhost:3000/negroni.go", nil)
+	if err != nil {
+		t.Error(err)
+	}
+
+	n.ServeHTTP(response, req)
+	refute(t, response.Code, http.StatusOK)
+}
+
+func TestStaticOptionsServeIndex(t *testing.T) {
+	response := httptest.NewRecorder()
+
+	n := New()
+	s := NewStatic(http.Dir("."))
+	s.IndexFile = "negroni.go"
+	n.Use(s)
+
+	req, err := http.NewRequest("GET", "http://localhost:3000/", nil)
+	if err != nil {
+		t.Error(err)
+	}
+
+	n.ServeHTTP(response, req)
+	expect(t, response.Code, http.StatusOK)
+}
+
+func TestStaticOptionsPrefix(t *testing.T) {
+	response := httptest.NewRecorder()
+
+	n := New()
+	s := NewStatic(http.Dir("."))
+	s.Prefix = "/public"
+	n.Use(s)
+
+	// Check file content behaviour
+	req, err := http.NewRequest("GET", "http://localhost:3000/public/negroni.go", nil)
+	if err != nil {
+		t.Error(err)
+	}
+
+	n.ServeHTTP(response, req)
+	expect(t, response.Code, http.StatusOK)
+}

vendor/src/github.com/codegangsta/negroni/translations/README_pt_br.md

@@ -0,0 +1,170 @@
+# Negroni [![GoDoc](https://godoc.org/github.com/codegangsta/negroni?status.svg)](http://godoc.org/github.com/codegangsta/negroni) [![wercker status](https://app.wercker.com/status/13688a4a94b82d84a0b8d038c4965b61/s "wercker status")](https://app.wercker.com/project/bykey/13688a4a94b82d84a0b8d038c4965b61)
+
+Negroni é uma abordagem idiomática para middleware web em Go. É pequeno, não intrusivo, e incentiva uso da biblioteca `net/http`.
+
+Se gosta da idéia do [Martini](http://github.com/go-martini/martini), mas acha que contém muita mágica, então Negroni é ideal.
+
+## Começando
+
+Depois de instalar Go e definir seu [GOPATH](http://golang.org/doc/code.html#GOPATH), criar seu primeirto arquivo `.go`. Iremos chamá-lo `server.go`.
+
+~~~ go
+package main
+
+import (
+  "github.com/codegangsta/negroni"
+  "net/http"
+  "fmt"
+)
+
+func main() {
+  mux := http.NewServeMux()
+  mux.HandleFunc("/", func(w http.ResponseWriter, req *http.Request) {
+    fmt.Fprintf(w, "Welcome to the home page!")
+  })
+
+  n := negroni.Classic()
+  n.UseHandler(mux)
+  n.Run(":3000")
+}
+~~~
+
+Depois instale o pacote Negroni (**go 1.1** ou superior)
+~~~
+go get github.com/codegangsta/negroni
+~~~
+
+Depois execute seu servidor:
+~~~
+go run server.go
+~~~
+
+Agora terá um servidor web Go net/http rodando em `localhost:3000`.
+
+## Precisa de Ajuda?
+Se você tem uma pergunta ou pedido de recurso,[go ask the mailing list](https://groups.google.com/forum/#!forum/negroni-users). O Github issues para o Negroni será usado exclusivamente para Reportar bugs e pull requests.
+
+## Negroni é um Framework?
+Negroni **não** é a framework. É uma biblioteca que é desenhada para trabalhar diretamente com net/http.
+
+## Roteamento?
+Negroni é TSPR(Traga seu próprio Roteamento). A comunidade Go já tem um grande número de roteadores http disponíveis, Negroni tenta rodar bem com todos eles pelo suporte total `net/http`/ Por exemplo, a integração com [Gorilla Mux](http://github.com/gorilla/mux) se parece com isso:
+
+~~~ go
+router := mux.NewRouter()
+router.HandleFunc("/", HomeHandler)
+
+n := negroni.New(Middleware1, Middleware2)
+// Or use a middleware with the Use() function
+n.Use(Middleware3)
+// router goes last
+n.UseHandler(router)
+
+n.Run(":3000")
+~~~
+
+## `negroni.Classic()`
+`negroni.Classic()`  fornece alguns middlewares padrão que são úteis para maioria das aplicações:
+
+* `negroni.Recovery` - Panic Recovery Middleware.
+* `negroni.Logging` - Request/Response Logging Middleware.
+* `negroni.Static` - Static File serving under the "public" directory.
+
+Isso torna muito fácil começar com alguns recursos úteis do Negroni.
+
+## Handlers
+Negroni fornece um middleware de fluxo bidirecional. Isso é feito através da interface `negroni.Handler`:
+
+~~~ go
+type Handler interface {
+  ServeHTTP(rw http.ResponseWriter, r *http.Request, next http.HandlerFunc)
+}
+~~~
+
+Se um middleware não tenha escrito o ResponseWriter, ele deve chamar a próxima `http.HandlerFunc` na cadeia para produzir o próximo handler middleware. Isso pode ser usado muito bem:
+
+~~~ go
+func MyMiddleware(rw http.ResponseWriter, r *http.Request, next http.HandlerFunc) {
+  // do some stuff before
+  next(rw, r)
+  // do some stuff after
+}
+~~~
+
+E pode mapear isso para a cadeia de handler com a função `Use`:
+
+~~~ go
+n := negroni.New()
+n.Use(negroni.HandlerFunc(MyMiddleware))
+~~~
+
+Você também pode mapear `http.Handler` antigos:
+
+~~~ go
+n := negroni.New()
+
+mux := http.NewServeMux()
+// map your routes
+
+n.UseHandler(mux)
+
+n.Run(":3000")
+~~~
+
+## `Run()`
+Negroni tem uma função de conveniência chamada `Run`. `Run` pega um endereço de string idêntico para [http.ListenAndServe](http://golang.org/pkg/net/http#ListenAndServe).
+
+~~~ go
+n := negroni.Classic()
+// ...
+log.Fatal(http.ListenAndServe(":8080", n))
+~~~
+
+## Middleware para Rotas Específicas
+Se você tem um grupo de rota com rotas que precisam ser executadas por um middleware específico, pode simplesmente criar uma nova instância de Negroni e usar no seu Manipulador de rota.
+
+~~~ go
+router := mux.NewRouter()
+adminRoutes := mux.NewRouter()
+// add admin routes here
+
+// Criar um middleware negroni para admin
+router.Handle("/admin", negroni.New(
+  Middleware1,
+  Middleware2,
+  negroni.Wrap(adminRoutes),
+))
+~~~
+
+## Middleware de Terceiros
+
+Aqui está uma lista atual de Middleware Compatíveis com Negroni. Sinta se livre para mandar um PR vinculando seu middleware se construiu um:
+
+
+| Middleware | Autor | Descrição |
+| -----------|--------|-------------|
+| [Graceful](https://github.com/stretchr/graceful) | [Tyler Bunnell](https://github.com/tylerb) | Graceful HTTP Shutdown |
+| [secure](https://github.com/unrolled/secure) | [Cory Jacobsen](https://github.com/unrolled) |  Implementa rapidamente itens de segurança.|
+| [binding](https://github.com/mholt/binding) | [Matt Holt](https://github.com/mholt) | Handler para mapeamento/validação de um request a estrutura. |
+| [logrus](https://github.com/meatballhat/negroni-logrus) | [Dan Buch](https://github.com/meatballhat) | Logrus-based logger |
+| [render](https://github.com/unrolled/render) | [Cory Jacobsen](https://github.com/unrolled) | Pacote para renderizar JSON, XML, e templates HTML. |
+| [gorelic](https://github.com/jingweno/negroni-gorelic) | [Jingwen Owen Ou](https://github.com/jingweno) | New Relic agent for Go runtime |
+| [gzip](https://github.com/phyber/negroni-gzip) | [phyber](https://github.com/phyber) | Handler para adicionar compreção gzip para as requisições |
+| [oauth2](https://github.com/goincremental/negroni-oauth2) | [David Bochenski](https://github.com/bochenski) | Handler que prove sistema de login OAuth 2.0 para aplicações Martini. Google Sign-in, Facebook Connect e Github login são suportados. |
+| [sessions](https://github.com/goincremental/negroni-sessions) | [David Bochenski](https://github.com/bochenski) | Handler que provê o serviço de sessão. |
+| [permissions](https://github.com/xyproto/permissions) | [Alexander Rødseth](https://github.com/xyproto) | Cookies, usuários e permissões. |
+| [onthefly](https://github.com/xyproto/onthefly) | [Alexander Rødseth](https://github.com/xyproto) | Pacote para gerar TinySVG, HTML e CSS em tempo real. |
+
+## Exemplos
+[Alexander Rødseth](https://github.com/xyproto) criou [mooseware](https://github.com/xyproto/mooseware), uma estrutura para escrever um handler middleware Negroni.
+
+## Servidor com autoreload?
+[gin](https://github.com/codegangsta/gin) e [fresh](https://github.com/pilu/fresh) são aplicativos para autoreload do Negroni.
+
+## Leitura Essencial para Iniciantes em Go & Negroni
+* [Usando um contexto para passar informação de um middleware para o manipulador final](http://elithrar.github.io/article/map-string-interface/)
+* [Entendendo middleware](http://mattstauffer.co/blog/laravel-5.0-middleware-replacing-filters)
+
+
+## Sobre
+Negroni é obsessivamente desenhado por ninguém menos que  [Code Gangsta](http://codegangsta.io/)

vendor/src/github.com/disintegration/imaging/LICENSE

@@ -0,0 +1,21 @@
+The MIT License (MIT)
+
+Copyright (c) 2012-2014 Grigory Dryapak
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

vendor/src/github.com/disintegration/imaging/README.md

@@ -0,0 +1,163 @@
+# Imaging
+
+Package imaging provides basic image manipulation functions (resize, rotate, flip, crop, etc.). 
+This package is based on the standard Go image package and works best along with it. 
+
+Image manipulation functions provided by the package take any image type 
+that implements `image.Image` interface as an input, and return a new image of 
+`*image.NRGBA` type (32bit RGBA colors, not premultiplied by alpha).
+
+## Installation
+
+Imaging requires Go version 1.2 or greater.
+
+    go get -u github.com/disintegration/imaging
+    
+## Documentation
+
+http://godoc.org/github.com/disintegration/imaging
+
+## Usage examples
+
+A few usage examples can be found below. See the documentation for the full list of supported functions. 
+
+### Image resizing
+```go
+// resize srcImage to size = 128x128px using the Lanczos filter
+dstImage128 := imaging.Resize(srcImage, 128, 128, imaging.Lanczos)
+
+// resize srcImage to width = 800px preserving the aspect ratio
+dstImage800 := imaging.Resize(srcImage, 800, 0, imaging.Lanczos)
+
+// scale down srcImage to fit the 800x600px bounding box
+dstImageFit := imaging.Fit(srcImage, 800, 600, imaging.Lanczos)
+
+// resize and crop the srcImage to make a 100x100px thumbnail
+dstImageThumb := imaging.Thumbnail(srcImage, 100, 100, imaging.Lanczos)
+```
+
+Imaging supports image resizing using various resampling filters. The most notable ones:
+- `NearestNeighbor` - Fastest resampling filter, no antialiasing.
+- `Box` - Simple and fast averaging filter appropriate for downscaling. When upscaling it's similar to NearestNeighbor.
+- `Linear` - Bilinear filter, smooth and reasonably fast.
+- `MitchellNetravali` - А smooth bicubic filter.
+- `CatmullRom` - A sharp bicubic filter. 
+- `Gaussian` - Blurring filter that uses gaussian function, useful for noise removal.
+- `Lanczos` - High-quality resampling filter for photographic images yielding sharp results, but it's slower than cubic filters.
+
+The full list of supported filters:  NearestNeighbor, Box, Linear, Hermite, MitchellNetravali, CatmullRom, BSpline, Gaussian, Lanczos, Hann, Hamming, Blackman, Bartlett, Welch, Cosine. Custom filters can be created using ResampleFilter struct.
+
+**Resampling filters comparison**
+
+Original image. Will be resized from 512x512px to 128x128px. 
+
+![srcImage](http://disintegration.github.io/imaging/in_lena_bw_512.png)
+
+Filter | Resize result
+---|---
+`imaging.NearestNeighbor` | ![dstImage](http://disintegration.github.io/imaging/out_resize_down_nearest.png) 
+`imaging.Box` | ![dstImage](http://disintegration.github.io/imaging/out_resize_down_box.png)
+`imaging.Linear` | ![dstImage](http://disintegration.github.io/imaging/out_resize_down_linear.png)
+`imaging.MitchellNetravali` | ![dstImage](http://disintegration.github.io/imaging/out_resize_down_mitchell.png)
+`imaging.CatmullRom` | ![dstImage](http://disintegration.github.io/imaging/out_resize_down_catrom.png)
+`imaging.Gaussian` | ![dstImage](http://disintegration.github.io/imaging/out_resize_down_gaussian.png)
+`imaging.Lanczos` | ![dstImage](http://disintegration.github.io/imaging/out_resize_down_lanczos.png)
+
+### Gaussian Blur
+```go
+dstImage := imaging.Blur(srcImage, 0.5)
+```
+
+Sigma parameter allows to control the strength of the blurring effect.
+
+Original image | Sigma = 0.5 | Sigma = 1.5
+---|---|---
+![srcImage](http://disintegration.github.io/imaging/in_lena_bw_128.png) | ![dstImage](http://disintegration.github.io/imaging/out_blur_0.5.png) | ![dstImage](http://disintegration.github.io/imaging/out_blur_1.5.png)
+
+### Sharpening
+```go
+dstImage := imaging.Sharpen(srcImage, 0.5)
+```
+
+Uses gaussian function internally. Sigma parameter allows to control the strength of the sharpening effect.
+
+Original image | Sigma = 0.5 | Sigma = 1.5
+---|---|---
+![srcImage](http://disintegration.github.io/imaging/in_lena_bw_128.png) | ![dstImage](http://disintegration.github.io/imaging/out_sharpen_0.5.png) | ![dstImage](http://disintegration.github.io/imaging/out_sharpen_1.5.png)
+
+### Gamma correction
+```go
+dstImage := imaging.AdjustGamma(srcImage, 0.75)
+```
+
+Original image | Gamma = 0.75 | Gamma = 1.25
+---|---|---
+![srcImage](http://disintegration.github.io/imaging/in_lena_bw_128.png) | ![dstImage](http://disintegration.github.io/imaging/out_gamma_0.75.png) | ![dstImage](http://disintegration.github.io/imaging/out_gamma_1.25.png)
+
+### Contrast adjustment
+```go
+dstImage := imaging.AdjustContrast(srcImage, 20)
+```
+
+Original image | Contrast = 20 | Contrast = -20
+---|---|---
+![srcImage](http://disintegration.github.io/imaging/in_lena_bw_128.png) | ![dstImage](http://disintegration.github.io/imaging/out_contrast_p20.png) | ![dstImage](http://disintegration.github.io/imaging/out_contrast_m20.png)
+
+### Brightness adjustment
+```go
+dstImage := imaging.AdjustBrightness(srcImage, 20)
+```
+
+Original image | Brightness = 20 | Brightness = -20
+---|---|---
+![srcImage](http://disintegration.github.io/imaging/in_lena_bw_128.png) | ![dstImage](http://disintegration.github.io/imaging/out_brightness_p20.png) | ![dstImage](http://disintegration.github.io/imaging/out_brightness_m20.png)
+
+
+### Complete code example
+Here is the code example that loads several images, makes thumbnails of them
+and combines them together side-by-side.
+
+```go
+package main
+
+import (
+    "image"
+    "image/color"
+    "runtime"
+    
+    "github.com/disintegration/imaging"
+)
+
+func main() {
+    // use all CPU cores for maximum performance
+    runtime.GOMAXPROCS(runtime.NumCPU())
+
+    // input files
+    files := []string{"01.jpg", "02.jpg", "03.jpg"}
+
+    // load images and make 100x100 thumbnails of them
+    var thumbnails []image.Image
+    for _, file := range files {
+        img, err := imaging.Open(file)
+        if err != nil {
+            panic(err)
+        }
+        thumb := imaging.Thumbnail(img, 100, 100, imaging.CatmullRom)
+        thumbnails = append(thumbnails, thumb)
+    }
+
+    // create a new blank image
+    dst := imaging.New(100*len(thumbnails), 100, color.NRGBA{0, 0, 0, 0})
+
+    // paste thumbnails into the new image side by side
+    for i, thumb := range thumbnails {
+        dst = imaging.Paste(dst, thumb, image.Pt(i*100, 0))
+    }
+
+    // save the combined image to file
+    err := imaging.Save(dst, "dst.jpg")
+    if err != nil {
+        panic(err)
+    }
+}
+```

vendor/src/github.com/disintegration/imaging/adjust.go

@@ -0,0 +1,200 @@
+package imaging
+
+import (
+	"image"
+	"image/color"
+	"math"
+)
+
+// AdjustFunc applies the fn function to each pixel of the img image and returns the adjusted image.
+//
+// Example:
+//
+// 	dstImage = imaging.AdjustFunc(
+// 		srcImage,
+// 		func(c color.NRGBA) color.NRGBA {
+// 			// shift the red channel by 16
+//			r := int(c.R) + 16
+//			if r > 255 {
+// 				r = 255
+// 			}
+// 			return color.NRGBA{uint8(r), c.G, c.B, c.A}
+// 		}
+// 	)
+//
+func AdjustFunc(img image.Image, fn func(c color.NRGBA) color.NRGBA) *image.NRGBA {
+	src := toNRGBA(img)
+	width := src.Bounds().Max.X
+	height := src.Bounds().Max.Y
+	dst := image.NewNRGBA(image.Rect(0, 0, width, height))
+
+	parallel(height, func(partStart, partEnd int) {
+		for y := partStart; y < partEnd; y++ {
+			for x := 0; x < width; x++ {
+				i := y*src.Stride + x*4
+				j := y*dst.Stride + x*4
+
+				r := src.Pix[i+0]
+				g := src.Pix[i+1]
+				b := src.Pix[i+2]
+				a := src.Pix[i+3]
+
+				c := fn(color.NRGBA{r, g, b, a})
+
+				dst.Pix[j+0] = c.R
+				dst.Pix[j+1] = c.G
+				dst.Pix[j+2] = c.B
+				dst.Pix[j+3] = c.A
+			}
+		}
+	})
+
+	return dst
+}
+
+// AdjustGamma performs a gamma correction on the image and returns the adjusted image.
+// Gamma parameter must be positive. Gamma = 1.0 gives the original image.
+// Gamma less than 1.0 darkens the image and gamma greater than 1.0 lightens it.
+//
+// Example:
+//
+//	dstImage = imaging.AdjustGamma(srcImage, 0.7)
+//
+func AdjustGamma(img image.Image, gamma float64) *image.NRGBA {
+	e := 1.0 / math.Max(gamma, 0.0001)
+	lut := make([]uint8, 256)
+
+	for i := 0; i < 256; i++ {
+		lut[i] = clamp(math.Pow(float64(i)/255.0, e) * 255.0)
+	}
+
+	fn := func(c color.NRGBA) color.NRGBA {
+		return color.NRGBA{lut[c.R], lut[c.G], lut[c.B], c.A}
+	}
+
+	return AdjustFunc(img, fn)
+}
+
+func sigmoid(a, b, x float64) float64 {
+	return 1 / (1 + math.Exp(b*(a-x)))
+}
+
+// AdjustSigmoid changes the contrast of the image using a sigmoidal function and returns the adjusted image.
+// It's a non-linear contrast change useful for photo adjustments as it preserves highlight and shadow detail.
+// The midpoint parameter is the midpoint of contrast that must be between 0 and 1, typically 0.5.
+// The factor parameter indicates how much to increase or decrease the contrast, typically in range (-10, 10).
+// If the factor parameter is positive the image contrast is increased otherwise the contrast is decreased.
+//
+// Examples:
+//
+//	dstImage = imaging.AdjustSigmoid(srcImage, 0.5, 3.0) // increase the contrast
+//	dstImage = imaging.AdjustSigmoid(srcImage, 0.5, -3.0) // decrease the contrast
+//
+func AdjustSigmoid(img image.Image, midpoint, factor float64) *image.NRGBA {
+	if factor == 0 {
+		return Clone(img)
+	}
+
+	lut := make([]uint8, 256)
+	a := math.Min(math.Max(midpoint, 0.0), 1.0)
+	b := math.Abs(factor)
+	sig0 := sigmoid(a, b, 0)
+	sig1 := sigmoid(a, b, 1)
+	e := 1.0e-6
+
+	if factor > 0 {
+		for i := 0; i < 256; i++ {
+			x := float64(i) / 255.0
+			sigX := sigmoid(a, b, x)
+			f := (sigX - sig0) / (sig1 - sig0)
+			lut[i] = clamp(f * 255.0)
+		}
+	} else {
+		for i := 0; i < 256; i++ {
+			x := float64(i) / 255.0
+			arg := math.Min(math.Max((sig1-sig0)*x+sig0, e), 1.0-e)
+			f := a - math.Log(1.0/arg-1.0)/b
+			lut[i] = clamp(f * 255.0)
+		}
+	}
+
+	fn := func(c color.NRGBA) color.NRGBA {
+		return color.NRGBA{lut[c.R], lut[c.G], lut[c.B], c.A}
+	}
+
+	return AdjustFunc(img, fn)
+}
+
+// AdjustContrast changes the contrast of the image using the percentage parameter and returns the adjusted image.
+// The percentage must be in range (-100, 100). The percentage = 0 gives the original image.
+// The percentage = -100 gives solid grey image.
+//
+// Examples:
+//
+//	dstImage = imaging.AdjustContrast(srcImage, -10) // decrease image contrast by 10%
+//	dstImage = imaging.AdjustContrast(srcImage, 20) // increase image contrast by 20%
+//
+func AdjustContrast(img image.Image, percentage float64) *image.NRGBA {
+	percentage = math.Min(math.Max(percentage, -100.0), 100.0)
+	lut := make([]uint8, 256)
+
+	v := (100.0 + percentage) / 100.0
+	for i := 0; i < 256; i++ {
+		if 0 <= v && v <= 1 {
+			lut[i] = clamp((0.5 + (float64(i)/255.0-0.5)*v) * 255.0)
+		} else if 1 < v && v < 2 {
+			lut[i] = clamp((0.5 + (float64(i)/255.0-0.5)*(1/(2.0-v))) * 255.0)
+		} else {
+			lut[i] = uint8(float64(i)/255.0+0.5) * 255
+		}
+	}
+
+	fn := func(c color.NRGBA) color.NRGBA {
+		return color.NRGBA{lut[c.R], lut[c.G], lut[c.B], c.A}
+	}
+
+	return AdjustFunc(img, fn)
+}
+
+// AdjustBrightness changes the brightness of the image using the percentage parameter and returns the adjusted image.
+// The percentage must be in range (-100, 100). The percentage = 0 gives the original image.
+// The percentage = -100 gives solid black image. The percentage = 100 gives solid white image.
+//
+// Examples:
+//
+//	dstImage = imaging.AdjustBrightness(srcImage, -15) // decrease image brightness by 15%
+//	dstImage = imaging.AdjustBrightness(srcImage, 10) // increase image brightness by 10%
+//
+func AdjustBrightness(img image.Image, percentage float64) *image.NRGBA {
+	percentage = math.Min(math.Max(percentage, -100.0), 100.0)
+	lut := make([]uint8, 256)
+
+	shift := 255.0 * percentage / 100.0
+	for i := 0; i < 256; i++ {
+		lut[i] = clamp(float64(i) + shift)
+	}
+
+	fn := func(c color.NRGBA) color.NRGBA {
+		return color.NRGBA{lut[c.R], lut[c.G], lut[c.B], c.A}
+	}
+
+	return AdjustFunc(img, fn)
+}
+
+// Grayscale produces grayscale version of the image.
+func Grayscale(img image.Image) *image.NRGBA {
+	fn := func(c color.NRGBA) color.NRGBA {
+		f := 0.299*float64(c.R) + 0.587*float64(c.G) + 0.114*float64(c.B)
+		y := uint8(f + 0.5)
+		return color.NRGBA{y, y, y, c.A}
+	}
+	return AdjustFunc(img, fn)
+}
+
+// Invert produces inverted (negated) version of the image.
+func Invert(img image.Image) *image.NRGBA {
+	fn := func(c color.NRGBA) color.NRGBA {
+		return color.NRGBA{255 - c.R, 255 - c.G, 255 - c.B, c.A}
+	}
+	return AdjustFunc(img, fn)
+}

vendor/src/github.com/disintegration/imaging/adjust_test.go

@@ -0,0 +1,504 @@
+package imaging
+
+import (
+	"image"
+	"testing"
+)
+
+func TestGrayscale(t *testing.T) {
+	td := []struct {
+		desc string
+		src  image.Image
+		want *image.NRGBA
+	}{
+		{
+			"Grayscale 3x3",
+			&image.NRGBA{
+				Rect:   image.Rect(-1, -1, 2, 2),
+				Stride: 3 * 4,
+				Pix: []uint8{
+					0xcc, 0x00, 0x00, 0x01, 0x00, 0xcc, 0x00, 0x02, 0x00, 0x00, 0xcc, 0x03,
+					0x11, 0x22, 0x33, 0xff, 0x33, 0x22, 0x11, 0xff, 0xaa, 0x33, 0xbb, 0xff,
+					0x00, 0x00, 0x00, 0xff, 0x33, 0x33, 0x33, 0xff, 0xff, 0xff, 0xff, 0xff,
+				},
+			},
+			&image.NRGBA{
+				Rect:   image.Rect(0, 0, 3, 3),
+				Stride: 3 * 4,
+				Pix: []uint8{
+					0x3d, 0x3d, 0x3d, 0x01, 0x78, 0x78, 0x78, 0x02, 0x17, 0x17, 0x17, 0x03,
+					0x1f, 0x1f, 0x1f, 0xff, 0x25, 0x25, 0x25, 0xff, 0x66, 0x66, 0x66, 0xff,
+					0x00, 0x00, 0x00, 0xff, 0x33, 0x33, 0x33, 0xff, 0xff, 0xff, 0xff, 0xff,
+				},
+			},
+		},
+	}
+	for _, d := range td {
+		got := Grayscale(d.src)
+		want := d.want
+		if !compareNRGBA(got, want, 0) {
+			t.Errorf("test [%s] failed: %#v", d.desc, got)
+		}
+	}
+}
+
+func TestInvert(t *testing.T) {
+	td := []struct {
+		desc string
+		src  image.Image
+		want *image.NRGBA
+	}{
+		{
+			"Invert 3x3",
+			&image.NRGBA{
+				Rect:   image.Rect(-1, -1, 2, 2),
+				Stride: 3 * 4,
+				Pix: []uint8{
+					0xcc, 0x00, 0x00, 0x01, 0x00, 0xcc, 0x00, 0x02, 0x00, 0x00, 0xcc, 0x03,
+					0x11, 0x22, 0x33, 0xff, 0x33, 0x22, 0x11, 0xff, 0xaa, 0x33, 0xbb, 0xff,
+					0x00, 0x00, 0x00, 0xff, 0x33, 0x33, 0x33, 0xff, 0xff, 0xff, 0xff, 0xff,
+				},
+			},
+			&image.NRGBA{
+				Rect:   image.Rect(0, 0, 3, 3),
+				Stride: 3 * 4,
+				Pix: []uint8{
+					0x33, 0xff, 0xff, 0x01, 0xff, 0x33, 0xff, 0x02, 0xff, 0xff, 0x33, 0x03,
+					0xee, 0xdd, 0xcc, 0xff, 0xcc, 0xdd, 0xee, 0xff, 0x55, 0xcc, 0x44, 0xff,
+					0xff, 0xff, 0xff, 0xff, 0xcc, 0xcc, 0xcc, 0xff, 0x00, 0x00, 0x00, 0xff,
+				},
+			},
+		},
+	}
+	for _, d := range td {
+		got := Invert(d.src)
+		want := d.want
+		if !compareNRGBA(got, want, 0) {
+			t.Errorf("test [%s] failed: %#v", d.desc, got)
+		}
+	}
+}
+
+func TestAdjustContrast(t *testing.T) {
+	td := []struct {
+		desc string
+		src  image.Image
+		p    float64
+		want *image.NRGBA
+	}{
+		{
+			"AdjustContrast 3x3 10",
+			&image.NRGBA{
+				Rect:   image.Rect(-1, -1, 2, 2),
+				Stride: 3 * 4,
+				Pix: []uint8{
+					0xcc, 0x00, 0x00, 0x01, 0x00, 0xcc, 0x00, 0x02, 0x00, 0x00, 0xcc, 0x03,
+					0x11, 0x22, 0x33, 0xff, 0x33, 0x22, 0x11, 0xff, 0xaa, 0x33, 0xbb, 0xff,
+					0x00, 0x00, 0x00, 0xff, 0x33, 0x33, 0x33, 0xff, 0xff, 0xff, 0xff, 0xff,
+				},
+			},
+			10,
+			&image.NRGBA{
+				Rect:   image.Rect(0, 0, 3, 3),
+				Stride: 3 * 4,
+				Pix: []uint8{
+					0xd5, 0x00, 0x00, 0x01, 0x00, 0xd5, 0x00, 0x02, 0x00, 0x00, 0xd5, 0x03,
+					0x05, 0x18, 0x2b, 0xff, 0x2b, 0x18, 0x05, 0xff, 0xaf, 0x2b, 0xc2, 0xff,
+					0x00, 0x00, 0x00, 0xff, 0x2b, 0x2b, 0x2b, 0xff, 0xff, 0xff, 0xff, 0xff,
+				},
+			},
+		},
+		{
+			"AdjustContrast 3x3 100",
+			&image.NRGBA{
+				Rect:   image.Rect(-1, -1, 2, 2),
+				Stride: 3 * 4,
+				Pix: []uint8{
+					0xcc, 0x00, 0x00, 0x01, 0x00, 0xcc, 0x00, 0x02, 0x00, 0x00, 0xcc, 0x03,
+					0x11, 0x22, 0x33, 0xff, 0x33, 0x22, 0x11, 0xff, 0xaa, 0x33, 0xbb, 0xff,
+					0x00, 0x00, 0x00, 0xff, 0x33, 0x33, 0x33, 0xff, 0xff, 0xff, 0xff, 0xff,
+				},
+			},
+			100,
+			&image.NRGBA{
+				Rect:   image.Rect(0, 0, 3, 3),
+				Stride: 3 * 4,
+				Pix: []uint8{
+					0xff, 0x00, 0x00, 0x01, 0x00, 0xff, 0x00, 0x02, 0x00, 0x00, 0xff, 0x03,
+					0x00, 0x00, 0x00, 0xff, 0x00, 0x00, 0x00, 0xff, 0xff, 0x00, 0xff, 0xff,
+					0x00, 0x00, 0x00, 0xff, 0x00, 0x00, 0x00, 0xff, 0xff, 0xff, 0xff, 0xff,
+				},
+			},
+		},
+		{
+			"AdjustContrast 3x3 -10",
+			&image.NRGBA{
+				Rect:   image.Rect(-1, -1, 2, 2),
+				Stride: 3 * 4,
+				Pix: []uint8{
+					0xcc, 0x00, 0x00, 0x01, 0x00, 0xcc, 0x00, 0x02, 0x00, 0x00, 0xcc, 0x03,
+					0x11, 0x22, 0x33, 0xff, 0x33, 0x22, 0x11, 0xff, 0xaa, 0x33, 0xbb, 0xff,
+					0x00, 0x00, 0x00, 0xff, 0x33, 0x33, 0x33, 0xff, 0xff, 0xff, 0xff, 0xff,
+				},
+			},
+			-10,
+			&image.NRGBA{
+				Rect:   image.Rect(0, 0, 3, 3),
+				Stride: 3 * 4,
+				Pix: []uint8{
+					0xc4, 0x0d, 0x0d, 0x01, 0x0d, 0xc4, 0x0d, 0x02, 0x0d, 0x0d, 0xc4, 0x03,
+					0x1c, 0x2b, 0x3b, 0xff, 0x3b, 0x2b, 0x1c, 0xff, 0xa6, 0x3b, 0xb5, 0xff,
+					0x0d, 0x0d, 0x0d, 0xff, 0x3b, 0x3b, 0x3b, 0xff, 0xf2, 0xf2, 0xf2, 0xff,
+				},
+			},
+		},
+		{
+			"AdjustContrast 3x3 -100",
+			&image.NRGBA{
+				Rect:   image.Rect(-1, -1, 2, 2),
+				Stride: 3 * 4,
+				Pix: []uint8{
+					0xcc, 0x00, 0x00, 0x01, 0x00, 0xcc, 0x00, 0x02, 0x00, 0x00, 0xcc, 0x03,
+					0x11, 0x22, 0x33, 0xff, 0x33, 0x22, 0x11, 0xff, 0xaa, 0x33, 0xbb, 0xff,
+					0x00, 0x00, 0x00, 0xff, 0x33, 0x33, 0x33, 0xff, 0xff, 0xff, 0xff, 0xff,
+				},
+			},
+			-100,
+			&image.NRGBA{
+				Rect:   image.Rect(0, 0, 3, 3),
+				Stride: 3 * 4,
+				Pix: []uint8{
+					0x80, 0x80, 0x80, 0x01, 0x80, 0x80, 0x80, 0x02, 0x80, 0x80, 0x80, 0x03,
+					0x80, 0x80, 0x80, 0xff, 0x80, 0x80, 0x80, 0xff, 0x80, 0x80, 0x80, 0xff,
+					0x80, 0x80, 0x80, 0xff, 0x80, 0x80, 0x80, 0xff, 0x80, 0x80, 0x80, 0xff,
+				},
+			},
+		},
+		{
+			"AdjustContrast 3x3 0",
+			&image.NRGBA{
+				Rect:   image.Rect(-1, -1, 2, 2),
+				Stride: 3 * 4,
+				Pix: []uint8{
+					0xcc, 0x00, 0x00, 0x01, 0x00, 0xcc, 0x00, 0x02, 0x00, 0x00, 0xcc, 0x03,
+					0x11, 0x22, 0x33, 0xff, 0x33, 0x22, 0x11, 0xff, 0xaa, 0x33, 0xbb, 0xff,
+					0x00, 0x00, 0x00, 0xff, 0x33, 0x33, 0x33, 0xff, 0xff, 0xff, 0xff, 0xff,
+				},
+			},
+			0,
+			&image.NRGBA{
+				Rect:   image.Rect(0, 0, 3, 3),
+				Stride: 3 * 4,
+				Pix: []uint8{
+					0xcc, 0x00, 0x00, 0x01, 0x00, 0xcc, 0x00, 0x02, 0x00, 0x00, 0xcc, 0x03,
+					0x11, 0x22, 0x33, 0xff, 0x33, 0x22, 0x11, 0xff, 0xaa, 0x33, 0xbb, 0xff,
+					0x00, 0x00, 0x00, 0xff, 0x33, 0x33, 0x33, 0xff, 0xff, 0xff, 0xff, 0xff,
+				},
+			},
+		},
+	}
+	for _, d := range td {
+		got := AdjustContrast(d.src, d.p)
+		want := d.want
+		if !compareNRGBA(got, want, 0) {
+			t.Errorf("test [%s] failed: %#v", d.desc, got)
+		}
+	}
+}
+
+func TestAdjustBrightness(t *testing.T) {
+	td := []struct {
+		desc string
+		src  image.Image
+		p    float64
+		want *image.NRGBA
+	}{
+		{
+			"AdjustBrightness 3x3 10",
+			&image.NRGBA{
+				Rect:   image.Rect(-1, -1, 2, 2),
+				Stride: 3 * 4,
+				Pix: []uint8{
+					0xcc, 0x00, 0x00, 0x01, 0x00, 0xcc, 0x00, 0x02, 0x00, 0x00, 0xcc, 0x03,
+					0x11, 0x22, 0x33, 0xff, 0x33, 0x22, 0x11, 0xff, 0xaa, 0x33, 0xbb, 0xff,
+					0x00, 0x00, 0x00, 0xff, 0x33, 0x33, 0x33, 0xff, 0xff, 0xff, 0xff, 0xff,
+				},
+			},
+			10,
+			&image.NRGBA{
+				Rect:   image.Rect(0, 0, 3, 3),
+				Stride: 3 * 4,
+				Pix: []uint8{
+					0xe6, 0x1a, 0x1a, 0x01, 0x1a, 0xe6, 0x1a, 0x02, 0x1a, 0x1a, 0xe6, 0x03,
+					0x2b, 0x3c, 0x4d, 0xff, 0x4d, 0x3c, 0x2b, 0xff, 0xc4, 0x4d, 0xd5, 0xff,
+					0x1a, 0x1a, 0x1a, 0xff, 0x4d, 0x4d, 0x4d, 0xff, 0xff, 0xff, 0xff, 0xff,
+				},
+			},
+		},
+		{
+			"AdjustBrightness 3x3 100",
+			&image.NRGBA{
+				Rect:   image.Rect(-1, -1, 2, 2),
+				Stride: 3 * 4,
+				Pix: []uint8{
+					0xcc, 0x00, 0x00, 0x01, 0x00, 0xcc, 0x00, 0x02, 0x00, 0x00, 0xcc, 0x03,
+					0x11, 0x22, 0x33, 0xff, 0x33, 0x22, 0x11, 0xff, 0xaa, 0x33, 0xbb, 0xff,
+					0x00, 0x00, 0x00, 0xff, 0x33, 0x33, 0x33, 0xff, 0xff, 0xff, 0xff, 0xff,
+				},
+			},
+			100,
+			&image.NRGBA{
+				Rect:   image.Rect(0, 0, 3, 3),
+				Stride: 3 * 4,
+				Pix: []uint8{
+					0xff, 0xff, 0xff, 0x01, 0xff, 0xff, 0xff, 0x02, 0xff, 0xff, 0xff, 0x03,
+					0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
+					0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
+				},
+			},
+		},
+		{
+			"AdjustBrightness 3x3 -10",
+			&image.NRGBA{
+				Rect:   image.Rect(-1, -1, 2, 2),
+				Stride: 3 * 4,
+				Pix: []uint8{
+					0xcc, 0x00, 0x00, 0x01, 0x00, 0xcc, 0x00, 0x02, 0x00, 0x00, 0xcc, 0x03,
+					0x11, 0x22, 0x33, 0xff, 0x33, 0x22, 0x11, 0xff, 0xaa, 0x33, 0xbb, 0xff,
+					0x00, 0x00, 0x00, 0xff, 0x33, 0x33, 0x33, 0xff, 0xff, 0xff, 0xff, 0xff,
+				},
+			},
+			-10,
+			&image.NRGBA{
+				Rect:   image.Rect(0, 0, 3, 3),
+				Stride: 3 * 4,
+				Pix: []uint8{
+					0xb3, 0x00, 0x00, 0x01, 0x00, 0xb3, 0x00, 0x02, 0x00, 0x00, 0xb3, 0x03,
+					0x00, 0x09, 0x1a, 0xff, 0x1a, 0x09, 0x00, 0xff, 0x91, 0x1a, 0xa2, 0xff,
+					0x00, 0x00, 0x00, 0xff, 0x1a, 0x1a, 0x1a, 0xff, 0xe6, 0xe6, 0xe6, 0xff,
+				},
+			},
+		},
+		{
+			"AdjustBrightness 3x3 -100",
+			&image.NRGBA{
+				Rect:   image.Rect(-1, -1, 2, 2),
+				Stride: 3 * 4,
+				Pix: []uint8{
+					0xcc, 0x00, 0x00, 0x01, 0x00, 0xcc, 0x00, 0x02, 0x00, 0x00, 0xcc, 0x03,
+					0x11, 0x22, 0x33, 0xff, 0x33, 0x22, 0x11, 0xff, 0xaa, 0x33, 0xbb, 0xff,
+					0x00, 0x00, 0x00, 0xff, 0x33, 0x33, 0x33, 0xff, 0xff, 0xff, 0xff, 0xff,
+				},
+			},
+			-100,
+			&image.NRGBA{
+				Rect:   image.Rect(0, 0, 3, 3),
+				Stride: 3 * 4,
+				Pix: []uint8{
+					0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x02, 0x00, 0x00, 0x00, 0x03,
+					0x00, 0x00, 0x00, 0xff, 0x00, 0x00, 0x00, 0xff, 0x00, 0x00, 0x00, 0xff,
+					0x00, 0x00, 0x00, 0xff, 0x00, 0x00, 0x00, 0xff, 0x00, 0x00, 0x00, 0xff,
+				},
+			},
+		},
+		{
+			"AdjustBrightness 3x3 0",
+			&image.NRGBA{
+				Rect:   image.Rect(-1, -1, 2, 2),
+				Stride: 3 * 4,
+				Pix: []uint8{
+					0xcc, 0x00, 0x00, 0x01, 0x00, 0xcc, 0x00, 0x02, 0x00, 0x00, 0xcc, 0x03,
+					0x11, 0x22, 0x33, 0xff, 0x33, 0x22, 0x11, 0xff, 0xaa, 0x33, 0xbb, 0xff,
+					0x00, 0x00, 0x00, 0xff, 0x33, 0x33, 0x33, 0xff, 0xff, 0xff, 0xff, 0xff,
+				},
+			},
+			0,
+			&image.NRGBA{
+				Rect:   image.Rect(0, 0, 3, 3),
+				Stride: 3 * 4,
+				Pix: []uint8{
+					0xcc, 0x00, 0x00, 0x01, 0x00, 0xcc, 0x00, 0x02, 0x00, 0x00, 0xcc, 0x03,
+					0x11, 0x22, 0x33, 0xff, 0x33, 0x22, 0x11, 0xff, 0xaa, 0x33, 0xbb, 0xff,
+					0x00, 0x00, 0x00, 0xff, 0x33, 0x33, 0x33, 0xff, 0xff, 0xff, 0xff, 0xff,
+				},
+			},
+		},
+	}
+	for _, d := range td {
+		got := AdjustBrightness(d.src, d.p)
+		want := d.want
+		if !compareNRGBA(got, want, 0) {
+			t.Errorf("test [%s] failed: %#v", d.desc, got)
+		}
+	}
+}
+
+func TestAdjustGamma(t *testing.T) {
+	td := []struct {
+		desc string
+		src  image.Image
+		p    float64
+		want *image.NRGBA
+	}{
+		{
+			"AdjustGamma 3x3 0.75",
+			&image.NRGBA{
+				Rect:   image.Rect(-1, -1, 2, 2),
+				Stride: 3 * 4,
+				Pix: []uint8{
+					0xcc, 0x00, 0x00, 0x01, 0x00, 0xcc, 0x00, 0x02, 0x00, 0x00, 0xcc, 0x03,
+					0x11, 0x22, 0x33, 0xff, 0x33, 0x22, 0x11, 0xff, 0xaa, 0x33, 0xbb, 0xff,
+					0x00, 0x00, 0x00, 0xff, 0x33, 0x33, 0x33, 0xff, 0xff, 0xff, 0xff, 0xff,
+				},
+			},
+			0.75,
+			&image.NRGBA{
+				Rect:   image.Rect(0, 0, 3, 3),
+				Stride: 3 * 4,
+				Pix: []uint8{
+					0xbd, 0x00, 0x00, 0x01, 0x00, 0xbd, 0x00, 0x02, 0x00, 0x00, 0xbd, 0x03,
+					0x07, 0x11, 0x1e, 0xff, 0x1e, 0x11, 0x07, 0xff, 0x95, 0x1e, 0xa9, 0xff,
+					0x00, 0x00, 0x00, 0xff, 0x1e, 0x1e, 0x1e, 0xff, 0xff, 0xff, 0xff, 0xff,
+				},
+			},
+		},
+		{
+			"AdjustGamma 3x3 1.5",
+			&image.NRGBA{
+				Rect:   image.Rect(-1, -1, 2, 2),
+				Stride: 3 * 4,
+				Pix: []uint8{
+					0xcc, 0x00, 0x00, 0x01, 0x00, 0xcc, 0x00, 0x02, 0x00, 0x00, 0xcc, 0x03,
+					0x11, 0x22, 0x33, 0xff, 0x33, 0x22, 0x11, 0xff, 0xaa, 0x33, 0xbb, 0xff,
+					0x00, 0x00, 0x00, 0xff, 0x33, 0x33, 0x33, 0xff, 0xff, 0xff, 0xff, 0xff,
+				},
+			},
+			1.5,
+			&image.NRGBA{
+				Rect:   image.Rect(0, 0, 3, 3),
+				Stride: 3 * 4,
+				Pix: []uint8{
+					0xdc, 0x00, 0x00, 0x01, 0x00, 0xdc, 0x00, 0x02, 0x00, 0x00, 0xdc, 0x03,
+					0x2a, 0x43, 0x57, 0xff, 0x57, 0x43, 0x2a, 0xff, 0xc3, 0x57, 0xcf, 0xff,
+					0x00, 0x00, 0x00, 0xff, 0x57, 0x57, 0x57, 0xff, 0xff, 0xff, 0xff, 0xff,
+				},
+			},
+		},
+		{
+			"AdjustGamma 3x3 1.0",
+			&image.NRGBA{
+				Rect:   image.Rect(-1, -1, 2, 2),
+				Stride: 3 * 4,
+				Pix: []uint8{
+					0xcc, 0x00, 0x00, 0x01, 0x00, 0xcc, 0x00, 0x02, 0x00, 0x00, 0xcc, 0x03,
+					0x11, 0x22, 0x33, 0xff, 0x33, 0x22, 0x11, 0xff, 0xaa, 0x33, 0xbb, 0xff,
+					0x00, 0x00, 0x00, 0xff, 0x33, 0x33, 0x33, 0xff, 0xff, 0xff, 0xff, 0xff,
+				},
+			},
+			1.0,
+			&image.NRGBA{
+				Rect:   image.Rect(0, 0, 3, 3),
+				Stride: 3 * 4,
+				Pix: []uint8{
+					0xcc, 0x00, 0x00, 0x01, 0x00, 0xcc, 0x00, 0x02, 0x00, 0x00, 0xcc, 0x03,
+					0x11, 0x22, 0x33, 0xff, 0x33, 0x22, 0x11, 0xff, 0xaa, 0x33, 0xbb, 0xff,
+					0x00, 0x00, 0x00, 0xff, 0x33, 0x33, 0x33, 0xff, 0xff, 0xff, 0xff, 0xff,
+				},
+			},
+		},
+	}
+	for _, d := range td {
+		got := AdjustGamma(d.src, d.p)
+		want := d.want
+		if !compareNRGBA(got, want, 0) {
+			t.Errorf("test [%s] failed: %#v", d.desc, got)
+		}
+	}
+}
+
+func TestAdjustSigmoid(t *testing.T) {
+	td := []struct {
+		desc string
+		src  image.Image
+		m    float64
+		p    float64
+		want *image.NRGBA
+	}{
+		{
+			"AdjustSigmoid 3x3 0.5 3.0",
+			&image.NRGBA{
+				Rect:   image.Rect(-1, -1, 2, 2),
+				Stride: 3 * 4,
+				Pix: []uint8{
+					0xcc, 0x00, 0x00, 0x01, 0x00, 0xcc, 0x00, 0x02, 0x00, 0x00, 0xcc, 0x03,
+					0x11, 0x22, 0x33, 0xff, 0x33, 0x22, 0x11, 0xff, 0xaa, 0x33, 0xbb, 0xff,
+					0x00, 0x00, 0x00, 0xff, 0x33, 0x33, 0x33, 0xff, 0xff, 0xff, 0xff, 0xff,
+				},
+			},
+			0.5,
+			3.0,
+			&image.NRGBA{
+				Rect:   image.Rect(0, 0, 3, 3),
+				Stride: 3 * 4,
+				Pix: []uint8{
+					0xd4, 0x00, 0x00, 0x01, 0x00, 0xd4, 0x00, 0x02, 0x00, 0x00, 0xd4, 0x03,
+					0x0d, 0x1b, 0x2b, 0xff, 0x2b, 0x1b, 0x0d, 0xff, 0xb1, 0x2b, 0xc3, 0xff,
+					0x00, 0x00, 0x00, 0xff, 0x2b, 0x2b, 0x2b, 0xff, 0xff, 0xff, 0xff, 0xff,
+				},
+			},
+		},
+		{
+			"AdjustSigmoid 3x3 0.5 -3.0",
+			&image.NRGBA{
+				Rect:   image.Rect(-1, -1, 2, 2),
+				Stride: 3 * 4,
+				Pix: []uint8{
+					0xcc, 0x00, 0x00, 0x01, 0x00, 0xcc, 0x00, 0x02, 0x00, 0x00, 0xcc, 0x03,
+					0x11, 0x22, 0x33, 0xff, 0x33, 0x22, 0x11, 0xff, 0xaa, 0x33, 0xbb, 0xff,
+					0x00, 0x00, 0x00, 0xff, 0x33, 0x33, 0x33, 0xff, 0xff, 0xff, 0xff, 0xff,
+				},
+			},
+			0.5,
+			-3.0,
+			&image.NRGBA{
+				Rect:   image.Rect(0, 0, 3, 3),
+				Stride: 3 * 4,
+				Pix: []uint8{
+					0xc4, 0x00, 0x00, 0x01, 0x00, 0xc4, 0x00, 0x02, 0x00, 0x00, 0xc4, 0x03,
+					0x16, 0x2a, 0x3b, 0xff, 0x3b, 0x2a, 0x16, 0xff, 0xa4, 0x3b, 0xb3, 0xff,
+					0x00, 0x00, 0x00, 0xff, 0x3b, 0x3b, 0x3b, 0xff, 0xff, 0xff, 0xff, 0xff,
+				},
+			},
+		},
+		{
+			"AdjustSigmoid 3x3 0.5 0.0",
+			&image.NRGBA{
+				Rect:   image.Rect(-1, -1, 2, 2),
+				Stride: 3 * 4,
+				Pix: []uint8{
+					0xcc, 0x00, 0x00, 0x01, 0x00, 0xcc, 0x00, 0x02, 0x00, 0x00, 0xcc, 0x03,
+					0x11, 0x22, 0x33, 0xff, 0x33, 0x22, 0x11, 0xff, 0xaa, 0x33, 0xbb, 0xff,
+					0x00, 0x00, 0x00, 0xff, 0x33, 0x33, 0x33, 0xff, 0xff, 0xff, 0xff, 0xff,
+				},
+			},
+			0.5,
+			0.0,
+			&image.NRGBA{
+				Rect:   image.Rect(0, 0, 3, 3),
+				Stride: 3 * 4,
+				Pix: []uint8{
+					0xcc, 0x00, 0x00, 0x01, 0x00, 0xcc, 0x00, 0x02, 0x00, 0x00, 0xcc, 0x03,
+					0x11, 0x22, 0x33, 0xff, 0x33, 0x22, 0x11, 0xff, 0xaa, 0x33, 0xbb, 0xff,
+					0x00, 0x00, 0x00, 0xff, 0x33, 0x33, 0x33, 0xff, 0xff, 0xff, 0xff, 0xff,
+				},
+			},
+		},
+	}
+	for _, d := range td {
+		got := AdjustSigmoid(d.src, d.m, d.p)
+		want := d.want
+		if !compareNRGBA(got, want, 0) {
+			t.Errorf("test [%s] failed: %#v", d.desc, got)
+		}
+	}
+}

vendor/src/github.com/disintegration/imaging/effects.go

@@ -0,0 +1,187 @@
+package imaging
+
+import (
+	"image"
+	"math"
+)
+
+func gaussianBlurKernel(x, sigma float64) float64 {
+	return math.Exp(-(x*x)/(2*sigma*sigma)) / (sigma * math.Sqrt(2*math.Pi))
+}
+
+// Blur produces a blurred version of the image using a Gaussian function.
+// Sigma parameter must be positive and indicates how much the image will be blurred.
+//
+// Usage example:
+//
+//		dstImage := imaging.Blur(srcImage, 3.5)
+//
+func Blur(img image.Image, sigma float64) *image.NRGBA {
+	if sigma <= 0 {
+		// sigma parameter must be positive!
+		return Clone(img)
+	}
+
+	src := toNRGBA(img)
+	radius := int(math.Ceil(sigma * 3.0))
+	kernel := make([]float64, radius+1)
+
+	for i := 0; i <= radius; i++ {
+		kernel[i] = gaussianBlurKernel(float64(i), sigma)
+	}
+
+	var dst *image.NRGBA
+	dst = blurHorizontal(src, kernel)
+	dst = blurVertical(dst, kernel)
+
+	return dst
+}
+
+func blurHorizontal(src *image.NRGBA, kernel []float64) *image.NRGBA {
+	radius := len(kernel) - 1
+	width := src.Bounds().Max.X
+	height := src.Bounds().Max.Y
+
+	dst := image.NewNRGBA(image.Rect(0, 0, width, height))
+
+	parallel(width, func(partStart, partEnd int) {
+		for x := partStart; x < partEnd; x++ {
+			start := x - radius
+			if start < 0 {
+				start = 0
+			}
+
+			end := x + radius
+			if end > width-1 {
+				end = width - 1
+			}
+
+			weightSum := 0.0
+			for ix := start; ix <= end; ix++ {
+				weightSum += kernel[absint(x-ix)]
+			}
+
+			for y := 0; y < height; y++ {
+
+				r, g, b, a := 0.0, 0.0, 0.0, 0.0
+				for ix := start; ix <= end; ix++ {
+					weight := kernel[absint(x-ix)]
+					i := y*src.Stride + ix*4
+					r += float64(src.Pix[i+0]) * weight
+					g += float64(src.Pix[i+1]) * weight
+					b += float64(src.Pix[i+2]) * weight
+					a += float64(src.Pix[i+3]) * weight
+				}
+
+				r = math.Min(math.Max(r/weightSum, 0.0), 255.0)
+				g = math.Min(math.Max(g/weightSum, 0.0), 255.0)
+				b = math.Min(math.Max(b/weightSum, 0.0), 255.0)
+				a = math.Min(math.Max(a/weightSum, 0.0), 255.0)
+
+				j := y*dst.Stride + x*4
+				dst.Pix[j+0] = uint8(r + 0.5)
+				dst.Pix[j+1] = uint8(g + 0.5)
+				dst.Pix[j+2] = uint8(b + 0.5)
+				dst.Pix[j+3] = uint8(a + 0.5)
+
+			}
+		}
+	})
+
+	return dst
+}
+
+func blurVertical(src *image.NRGBA, kernel []float64) *image.NRGBA {
+	radius := len(kernel) - 1
+	width := src.Bounds().Max.X
+	height := src.Bounds().Max.Y
+
+	dst := image.NewNRGBA(image.Rect(0, 0, width, height))
+
+	parallel(height, func(partStart, partEnd int) {
+		for y := partStart; y < partEnd; y++ {
+			start := y - radius
+			if start < 0 {
+				start = 0
+			}
+
+			end := y + radius
+			if end > height-1 {
+				end = height - 1
+			}
+
+			weightSum := 0.0
+			for iy := start; iy <= end; iy++ {
+				weightSum += kernel[absint(y-iy)]
+			}
+
+			for x := 0; x < width; x++ {
+
+				r, g, b, a := 0.0, 0.0, 0.0, 0.0
+				for iy := start; iy <= end; iy++ {
+					weight := kernel[absint(y-iy)]
+					i := iy*src.Stride + x*4
+					r += float64(src.Pix[i+0]) * weight
+					g += float64(src.Pix[i+1]) * weight
+					b += float64(src.Pix[i+2]) * weight
+					a += float64(src.Pix[i+3]) * weight
+				}
+
+				r = math.Min(math.Max(r/weightSum, 0.0), 255.0)
+				g = math.Min(math.Max(g/weightSum, 0.0), 255.0)
+				b = math.Min(math.Max(b/weightSum, 0.0), 255.0)
+				a = math.Min(math.Max(a/weightSum, 0.0), 255.0)
+
+				j := y*dst.Stride + x*4
+				dst.Pix[j+0] = uint8(r + 0.5)
+				dst.Pix[j+1] = uint8(g + 0.5)
+				dst.Pix[j+2] = uint8(b + 0.5)
+				dst.Pix[j+3] = uint8(a + 0.5)
+
+			}
+		}
+	})
+
+	return dst
+}
+
+// Sharpen produces a sharpened version of the image.
+// Sigma parameter must be positive and indicates how much the image will be sharpened.
+//
+// Usage example:
+//
+//		dstImage := imaging.Sharpen(srcImage, 3.5)
+//
+func Sharpen(img image.Image, sigma float64) *image.NRGBA {
+	if sigma <= 0 {
+		// sigma parameter must be positive!
+		return Clone(img)
+	}
+
+	src := toNRGBA(img)
+	blurred := Blur(img, sigma)
+
+	width := src.Bounds().Max.X
+	height := src.Bounds().Max.Y
+	dst := image.NewNRGBA(image.Rect(0, 0, width, height))
+
+	parallel(height, func(partStart, partEnd int) {
+		for y := partStart; y < partEnd; y++ {
+			for x := 0; x < width; x++ {
+				i := y*src.Stride + x*4
+				for j := 0; j < 4; j++ {
+					k := i + j
+					val := int(src.Pix[k]) + (int(src.Pix[k]) - int(blurred.Pix[k]))
+					if val < 0 {
+						val = 0
+					} else if val > 255 {
+						val = 255
+					}
+					dst.Pix[k] = uint8(val)
+				}
+			}
+		}
+	})
+
+	return dst
+}

vendor/src/github.com/disintegration/imaging/effects_test.go

@@ -0,0 +1,128 @@
+package imaging
+
+import (
+	"image"
+	"testing"
+)
+
+func TestBlur(t *testing.T) {
+	td := []struct {
+		desc  string
+		src   image.Image
+		sigma float64
+		want  *image.NRGBA
+	}{
+		{
+			"Blur 3x3 0.5",
+			&image.NRGBA{
+				Rect:   image.Rect(-1, -1, 2, 2),
+				Stride: 3 * 4,
+				Pix: []uint8{
+					0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+					0x00, 0x00, 0x00, 0x00, 0x66, 0xaa, 0xff, 0xff, 0x00, 0x00, 0x00, 0x00,
+					0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+				},
+			},
+			0.5,
+			&image.NRGBA{
+				Rect:   image.Rect(0, 0, 3, 3),
+				Stride: 3 * 4,
+				Pix: []uint8{
+					0x01, 0x02, 0x04, 0x04, 0x0a, 0x10, 0x18, 0x18, 0x01, 0x02, 0x04, 0x04,
+					0x09, 0x10, 0x18, 0x18, 0x3f, 0x69, 0x9e, 0x9e, 0x09, 0x10, 0x18, 0x18,
+					0x01, 0x02, 0x04, 0x04, 0x0a, 0x10, 0x18, 0x18, 0x01, 0x02, 0x04, 0x04,
+				},
+			},
+		},
+		{
+
+			"Blur 3x3 10",
+			&image.NRGBA{
+				Rect:   image.Rect(-1, -1, 2, 2),
+				Stride: 3 * 4,
+				Pix: []uint8{
+					0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+					0x00, 0x00, 0x00, 0x00, 0x66, 0xaa, 0xff, 0xff, 0x00, 0x00, 0x00, 0x00,
+					0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+				},
+			},
+			10,
+			&image.NRGBA{
+				Rect:   image.Rect(0, 0, 3, 3),
+				Stride: 3 * 4,
+				Pix: []uint8{
+					0x0b, 0x13, 0x1c, 0x1c, 0x0b, 0x13, 0x1c, 0x1c, 0x0b, 0x13, 0x1c, 0x1c,
+					0x0b, 0x13, 0x1c, 0x1c, 0x0b, 0x13, 0x1c, 0x1c, 0x0b, 0x13, 0x1c, 0x1c,
+					0x0b, 0x13, 0x1c, 0x1c, 0x0b, 0x13, 0x1c, 0x1c, 0x0b, 0x13, 0x1c, 0x1c,
+				},
+			},
+		},
+	}
+	for _, d := range td {
+		got := Blur(d.src, d.sigma)
+		want := d.want
+		if !compareNRGBA(got, want, 0) {
+			t.Errorf("test [%s] failed: %#v", d.desc, got)
+		}
+	}
+}
+
+func TestSharpen(t *testing.T) {
+	td := []struct {
+		desc  string
+		src   image.Image
+		sigma float64
+		want  *image.NRGBA
+	}{
+		{
+			"Sharpen 3x3 0.5",
+			&image.NRGBA{
+				Rect:   image.Rect(-1, -1, 2, 2),
+				Stride: 3 * 4,
+				Pix: []uint8{
+					0x66, 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, 0x66,
+					0x66, 0x66, 0x66, 0x66, 0x77, 0x77, 0x77, 0x77, 0x66, 0x66, 0x66, 0x66,
+					0x66, 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, 0x66,
+				},
+			},
+			0.5,
+			&image.NRGBA{
+				Rect:   image.Rect(0, 0, 3, 3),
+				Stride: 3 * 4,
+				Pix: []uint8{
+					0x66, 0x66, 0x66, 0x66, 0x64, 0x64, 0x64, 0x64, 0x66, 0x66, 0x66, 0x66,
+					0x64, 0x64, 0x64, 0x64, 0x7e, 0x7e, 0x7e, 0x7e, 0x64, 0x64, 0x64, 0x64,
+					0x66, 0x66, 0x66, 0x66, 0x64, 0x64, 0x64, 0x64, 0x66, 0x66, 0x66, 0x66},
+			},
+		},
+		{
+
+			"Sharpen 3x3 10",
+			&image.NRGBA{
+				Rect:   image.Rect(-1, -1, 2, 2),
+				Stride: 3 * 4,
+				Pix: []uint8{
+					0x66, 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, 0x66,
+					0x66, 0x66, 0x66, 0x66, 0x77, 0x77, 0x77, 0x77, 0x66, 0x66, 0x66, 0x66,
+					0x66, 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, 0x66},
+			},
+			100,
+			&image.NRGBA{
+				Rect:   image.Rect(0, 0, 3, 3),
+				Stride: 3 * 4,
+				Pix: []uint8{
+					0x64, 0x64, 0x64, 0x64, 0x64, 0x64, 0x64, 0x64, 0x64, 0x64, 0x64, 0x64,
+					0x64, 0x64, 0x64, 0x64, 0x86, 0x86, 0x86, 0x86, 0x64, 0x64, 0x64, 0x64,
+					0x64, 0x64, 0x64, 0x64, 0x64, 0x64, 0x64, 0x64, 0x64, 0x64, 0x64, 0x64,
+				},
+			},
+		},
+	}
+	for _, d := range td {
+		got := Sharpen(d.src, d.sigma)
+		want := d.want
+		if !compareNRGBA(got, want, 0) {
+			t.Errorf("test [%s] failed: %#v", d.desc, got)
+		}
+	}
+}

vendor/src/github.com/disintegration/imaging/helpers.go

@@ -0,0 +1,436 @@
+/*
+Package imaging provides basic image manipulation functions (resize, rotate, flip, crop, etc.).
+This package is based on the standard Go image package and works best along with it.
+
+Image manipulation functions provided by the package take any image type
+that implements `image.Image` interface as an input, and return a new image of
+`*image.NRGBA` type (32bit RGBA colors, not premultiplied by alpha).
+
+Imaging package uses parallel goroutines for faster image processing.
+To achieve maximum performance, make sure to allow Go to utilize all CPU cores:
+
+	runtime.GOMAXPROCS(runtime.NumCPU())
+*/
+package imaging
+
+import (
+	"errors"
+	"image"
+	"image/color"
+	"image/gif"
+	"image/jpeg"
+	"image/png"
+	"io"
+	"os"
+	"path/filepath"
+	"strings"
+
+	"golang.org/x/image/bmp"
+	"golang.org/x/image/tiff"
+)
+
+type Format int
+
+const (
+	JPEG Format = iota
+	PNG
+	GIF
+	TIFF
+	BMP
+)
+
+func (f Format) String() string {
+	switch f {
+	case JPEG:
+		return "JPEG"
+	case PNG:
+		return "PNG"
+	case GIF:
+		return "GIF"
+	case TIFF:
+		return "TIFF"
+	case BMP:
+		return "BMP"
+	default:
+		return "Unsupported"
+	}
+}
+
+var (
+	ErrUnsupportedFormat = errors.New("imaging: unsupported image format")
+)
+
+// Decode reads an image from r.
+func Decode(r io.Reader) (image.Image, error) {
+	img, _, err := image.Decode(r)
+	if err != nil {
+		return nil, err
+	}
+	return toNRGBA(img), nil
+}
+
+// Open loads an image from file
+func Open(filename string) (image.Image, error) {
+	file, err := os.Open(filename)
+	if err != nil {
+		return nil, err
+	}
+	defer file.Close()
+	img, err := Decode(file)
+	return img, err
+}
+
+// Encode writes the image img to w in the specified format (JPEG, PNG, GIF, TIFF or BMP).
+func Encode(w io.Writer, img image.Image, format Format) error {
+	var err error
+	switch format {
+	case JPEG:
+		var rgba *image.RGBA
+		if nrgba, ok := img.(*image.NRGBA); ok {
+			if nrgba.Opaque() {
+				rgba = &image.RGBA{
+					Pix:    nrgba.Pix,
+					Stride: nrgba.Stride,
+					Rect:   nrgba.Rect,
+				}
+			}
+		}
+		if rgba != nil {
+			err = jpeg.Encode(w, rgba, &jpeg.Options{Quality: 95})
+		} else {
+			err = jpeg.Encode(w, img, &jpeg.Options{Quality: 95})
+		}
+
+	case PNG:
+		err = png.Encode(w, img)
+	case GIF:
+		err = gif.Encode(w, img, &gif.Options{NumColors: 256})
+	case TIFF:
+		err = tiff.Encode(w, img, &tiff.Options{Compression: tiff.Deflate, Predictor: true})
+	case BMP:
+		err = bmp.Encode(w, img)
+	default:
+		err = ErrUnsupportedFormat
+	}
+	return err
+}
+
+// Save saves the image to file with the specified filename.
+// The format is determined from the filename extension: "jpg" (or "jpeg"), "png", "gif", "tif" (or "tiff") and "bmp" are supported.
+func Save(img image.Image, filename string) (err error) {
+	formats := map[string]Format{
+		".jpg":  JPEG,
+		".jpeg": JPEG,
+		".png":  PNG,
+		".tif":  TIFF,
+		".tiff": TIFF,
+		".bmp":  BMP,
+		".gif":  GIF,
+	}
+
+	ext := strings.ToLower(filepath.Ext(filename))
+	f, ok := formats[ext]
+	if !ok {
+		return ErrUnsupportedFormat
+	}
+
+	file, err := os.Create(filename)
+	if err != nil {
+		return err
+	}
+	defer file.Close()
+
+	return Encode(file, img, f)
+}
+
+// New creates a new image with the specified width and height, and fills it with the specified color.
+func New(width, height int, fillColor color.Color) *image.NRGBA {
+	if width <= 0 || height <= 0 {
+		return &image.NRGBA{}
+	}
+
+	dst := image.NewNRGBA(image.Rect(0, 0, width, height))
+	c := color.NRGBAModel.Convert(fillColor).(color.NRGBA)
+
+	if c.R == 0 && c.G == 0 && c.B == 0 && c.A == 0 {
+		return dst
+	}
+
+	cs := []uint8{c.R, c.G, c.B, c.A}
+
+	// fill the first row
+	for x := 0; x < width; x++ {
+		copy(dst.Pix[x*4:(x+1)*4], cs)
+	}
+	// copy the first row to other rows
+	for y := 1; y < height; y++ {
+		copy(dst.Pix[y*dst.Stride:y*dst.Stride+width*4], dst.Pix[0:width*4])
+	}
+
+	return dst
+}
+
+// Clone returns a copy of the given image.
+func Clone(img image.Image) *image.NRGBA {
+	srcBounds := img.Bounds()
+	srcMinX := srcBounds.Min.X
+	srcMinY := srcBounds.Min.Y
+
+	dstBounds := srcBounds.Sub(srcBounds.Min)
+	dstW := dstBounds.Dx()
+	dstH := dstBounds.Dy()
+	dst := image.NewNRGBA(dstBounds)
+
+	switch src := img.(type) {
+
+	case *image.NRGBA:
+		rowSize := srcBounds.Dx() * 4
+		parallel(dstH, func(partStart, partEnd int) {
+			for dstY := partStart; dstY < partEnd; dstY++ {
+				di := dst.PixOffset(0, dstY)
+				si := src.PixOffset(srcMinX, srcMinY+dstY)
+				copy(dst.Pix[di:di+rowSize], src.Pix[si:si+rowSize])
+			}
+		})
+
+	case *image.NRGBA64:
+		parallel(dstH, func(partStart, partEnd int) {
+			for dstY := partStart; dstY < partEnd; dstY++ {
+				di := dst.PixOffset(0, dstY)
+				si := src.PixOffset(srcMinX, srcMinY+dstY)
+				for dstX := 0; dstX < dstW; dstX++ {
+
+					dst.Pix[di+0] = src.Pix[si+0]
+					dst.Pix[di+1] = src.Pix[si+2]
+					dst.Pix[di+2] = src.Pix[si+4]
+					dst.Pix[di+3] = src.Pix[si+6]
+
+					di += 4
+					si += 8
+
+				}
+			}
+		})
+
+	case *image.RGBA:
+		parallel(dstH, func(partStart, partEnd int) {
+			for dstY := partStart; dstY < partEnd; dstY++ {
+				di := dst.PixOffset(0, dstY)
+				si := src.PixOffset(srcMinX, srcMinY+dstY)
+				for dstX := 0; dstX < dstW; dstX++ {
+
+					a := src.Pix[si+3]
+					dst.Pix[di+3] = a
+					switch a {
+					case 0:
+						dst.Pix[di+0] = 0
+						dst.Pix[di+1] = 0
+						dst.Pix[di+2] = 0
+					case 0xff:
+						dst.Pix[di+0] = src.Pix[si+0]
+						dst.Pix[di+1] = src.Pix[si+1]
+						dst.Pix[di+2] = src.Pix[si+2]
+					default:
+						dst.Pix[di+0] = uint8(uint16(src.Pix[si+0]) * 0xff / uint16(a))
+						dst.Pix[di+1] = uint8(uint16(src.Pix[si+1]) * 0xff / uint16(a))
+						dst.Pix[di+2] = uint8(uint16(src.Pix[si+2]) * 0xff / uint16(a))
+					}
+
+					di += 4
+					si += 4
+
+				}
+			}
+		})
+
+	case *image.RGBA64:
+		parallel(dstH, func(partStart, partEnd int) {
+			for dstY := partStart; dstY < partEnd; dstY++ {
+				di := dst.PixOffset(0, dstY)
+				si := src.PixOffset(srcMinX, srcMinY+dstY)
+				for dstX := 0; dstX < dstW; dstX++ {
+
+					a := src.Pix[si+6]
+					dst.Pix[di+3] = a
+					switch a {
+					case 0:
+						dst.Pix[di+0] = 0
+						dst.Pix[di+1] = 0
+						dst.Pix[di+2] = 0
+					case 0xff:
+						dst.Pix[di+0] = src.Pix[si+0]
+						dst.Pix[di+1] = src.Pix[si+2]
+						dst.Pix[di+2] = src.Pix[si+4]
+					default:
+						dst.Pix[di+0] = uint8(uint16(src.Pix[si+0]) * 0xff / uint16(a))
+						dst.Pix[di+1] = uint8(uint16(src.Pix[si+2]) * 0xff / uint16(a))
+						dst.Pix[di+2] = uint8(uint16(src.Pix[si+4]) * 0xff / uint16(a))
+					}
+
+					di += 4
+					si += 8
+
+				}
+			}
+		})
+
+	case *image.Gray:
+		parallel(dstH, func(partStart, partEnd int) {
+			for dstY := partStart; dstY < partEnd; dstY++ {
+				di := dst.PixOffset(0, dstY)
+				si := src.PixOffset(srcMinX, srcMinY+dstY)
+				for dstX := 0; dstX < dstW; dstX++ {
+
+					c := src.Pix[si]
+					dst.Pix[di+0] = c
+					dst.Pix[di+1] = c
+					dst.Pix[di+2] = c
+					dst.Pix[di+3] = 0xff
+
+					di += 4
+					si += 1
+
+				}
+			}
+		})
+
+	case *image.Gray16:
+		parallel(dstH, func(partStart, partEnd int) {
+			for dstY := partStart; dstY < partEnd; dstY++ {
+				di := dst.PixOffset(0, dstY)
+				si := src.PixOffset(srcMinX, srcMinY+dstY)
+				for dstX := 0; dstX < dstW; dstX++ {
+
+					c := src.Pix[si]
+					dst.Pix[di+0] = c
+					dst.Pix[di+1] = c
+					dst.Pix[di+2] = c
+					dst.Pix[di+3] = 0xff
+
+					di += 4
+					si += 2
+
+				}
+			}
+		})
+
+	case *image.YCbCr:
+		parallel(dstH, func(partStart, partEnd int) {
+			for dstY := partStart; dstY < partEnd; dstY++ {
+				di := dst.PixOffset(0, dstY)
+				switch src.SubsampleRatio {
+				case image.YCbCrSubsampleRatio422:
+					siy0 := dstY * src.YStride
+					sic0 := dstY * src.CStride
+					for dstX := 0; dstX < dstW; dstX = dstX + 1 {
+						siy := siy0 + dstX
+						sic := sic0 + ((srcMinX+dstX)/2 - srcMinX/2)
+						r, g, b := color.YCbCrToRGB(src.Y[siy], src.Cb[sic], src.Cr[sic])
+						dst.Pix[di+0] = r
+						dst.Pix[di+1] = g
+						dst.Pix[di+2] = b
+						dst.Pix[di+3] = 0xff
+						di += 4
+					}
+				case image.YCbCrSubsampleRatio420:
+					siy0 := dstY * src.YStride
+					sic0 := ((srcMinY+dstY)/2 - srcMinY/2) * src.CStride
+					for dstX := 0; dstX < dstW; dstX = dstX + 1 {
+						siy := siy0 + dstX
+						sic := sic0 + ((srcMinX+dstX)/2 - srcMinX/2)
+						r, g, b := color.YCbCrToRGB(src.Y[siy], src.Cb[sic], src.Cr[sic])
+						dst.Pix[di+0] = r
+						dst.Pix[di+1] = g
+						dst.Pix[di+2] = b
+						dst.Pix[di+3] = 0xff
+						di += 4
+					}
+				case image.YCbCrSubsampleRatio440:
+					siy0 := dstY * src.YStride
+					sic0 := ((srcMinY+dstY)/2 - srcMinY/2) * src.CStride
+					for dstX := 0; dstX < dstW; dstX = dstX + 1 {
+						siy := siy0 + dstX
+						sic := sic0 + dstX
+						r, g, b := color.YCbCrToRGB(src.Y[siy], src.Cb[sic], src.Cr[sic])
+						dst.Pix[di+0] = r
+						dst.Pix[di+1] = g
+						dst.Pix[di+2] = b
+						dst.Pix[di+3] = 0xff
+						di += 4
+					}
+				default:
+					siy0 := dstY * src.YStride
+					sic0 := dstY * src.CStride
+					for dstX := 0; dstX < dstW; dstX++ {
+						siy := siy0 + dstX
+						sic := sic0 + dstX
+						r, g, b := color.YCbCrToRGB(src.Y[siy], src.Cb[sic], src.Cr[sic])
+						dst.Pix[di+0] = r
+						dst.Pix[di+1] = g
+						dst.Pix[di+2] = b
+						dst.Pix[di+3] = 0xff
+						di += 4
+					}
+				}
+			}
+		})
+
+	case *image.Paletted:
+		plen := len(src.Palette)
+		pnew := make([]color.NRGBA, plen)
+		for i := 0; i < plen; i++ {
+			pnew[i] = color.NRGBAModel.Convert(src.Palette[i]).(color.NRGBA)
+		}
+
+		parallel(dstH, func(partStart, partEnd int) {
+			for dstY := partStart; dstY < partEnd; dstY++ {
+				di := dst.PixOffset(0, dstY)
+				si := src.PixOffset(srcMinX, srcMinY+dstY)
+				for dstX := 0; dstX < dstW; dstX++ {
+
+					c := pnew[src.Pix[si]]
+					dst.Pix[di+0] = c.R
+					dst.Pix[di+1] = c.G
+					dst.Pix[di+2] = c.B
+					dst.Pix[di+3] = c.A
+
+					di += 4
+					si += 1
+
+				}
+			}
+		})
+
+	default:
+		parallel(dstH, func(partStart, partEnd int) {
+			for dstY := partStart; dstY < partEnd; dstY++ {
+				di := dst.PixOffset(0, dstY)
+				for dstX := 0; dstX < dstW; dstX++ {
+
+					c := color.NRGBAModel.Convert(img.At(srcMinX+dstX, srcMinY+dstY)).(color.NRGBA)
+					dst.Pix[di+0] = c.R
+					dst.Pix[di+1] = c.G
+					dst.Pix[di+2] = c.B
+					dst.Pix[di+3] = c.A
+
+					di += 4
+
+				}
+			}
+		})
+
+	}
+
+	return dst
+}
+
+// This function used internally to convert any image type to NRGBA if needed.
+func toNRGBA(img image.Image) *image.NRGBA {
+	srcBounds := img.Bounds()
+	if srcBounds.Min.X == 0 && srcBounds.Min.Y == 0 {
+		if src0, ok := img.(*image.NRGBA); ok {
+			return src0
+		}
+	}
+	return Clone(img)
+}

vendor/src/github.com/disintegration/imaging/helpers_test.go

@@ -0,0 +1,361 @@
+package imaging
+
+import (
+	"bytes"
+	"image"
+	"image/color"
+	"testing"
+)
+
+func compareNRGBA(img1, img2 *image.NRGBA, delta int) bool {
+	if !img1.Rect.Eq(img2.Rect) {
+		return false
+	}
+
+	if len(img1.Pix) != len(img2.Pix) {
+		return false
+	}
+
+	for i := 0; i < len(img1.Pix); i++ {
+		if absint(int(img1.Pix[i])-int(img2.Pix[i])) > delta {
+			return false
+		}
+	}
+
+	return true
+}
+
+func TestEncodeDecode(t *testing.T) {
+	imgWithAlpha := image.NewNRGBA(image.Rect(0, 0, 3, 3))
+	imgWithAlpha.Pix = []uint8{
+		0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11,
+		127, 128, 129, 130, 131, 132, 133, 134, 135, 136, 137, 138,
+		244, 245, 246, 247, 248, 249, 250, 252, 252, 253, 254, 255,
+	}
+
+	imgWithoutAlpha := image.NewNRGBA(image.Rect(0, 0, 3, 3))
+	imgWithoutAlpha.Pix = []uint8{
+		0, 1, 2, 255, 4, 5, 6, 255, 8, 9, 10, 255,
+		127, 128, 129, 255, 131, 132, 133, 255, 135, 136, 137, 255,
+		244, 245, 246, 255, 248, 249, 250, 255, 252, 253, 254, 255,
+	}
+
+	for _, format := range []Format{JPEG, PNG, GIF, BMP, TIFF} {
+		img := imgWithoutAlpha
+		if format == PNG {
+			img = imgWithAlpha
+		}
+
+		buf := &bytes.Buffer{}
+		err := Encode(buf, img, format)
+		if err != nil {
+			t.Errorf("fail encoding format %s", format)
+			continue
+		}
+
+		img2, err := Decode(buf)
+		if err != nil {
+			t.Errorf("fail decoding format %s", format)
+			continue
+		}
+		img2cloned := Clone(img2)
+
+		delta := 0
+		if format == JPEG {
+			delta = 3
+		} else if format == GIF {
+			delta = 16
+		}
+
+		if !compareNRGBA(img, img2cloned, delta) {
+			t.Errorf("test [DecodeEncode %s] failed: %#v %#v", format, img, img2cloned)
+			continue
+		}
+	}
+
+	buf := &bytes.Buffer{}
+	err := Encode(buf, imgWithAlpha, Format(100))
+	if err != ErrUnsupportedFormat {
+		t.Errorf("expected ErrUnsupportedFormat")
+	}
+}
+
+func TestNew(t *testing.T) {
+	td := []struct {
+		desc      string
+		w, h      int
+		c         color.Color
+		dstBounds image.Rectangle
+		dstPix    []uint8
+	}{
+		{
+			"New 1x1 black",
+			1, 1,
+			color.NRGBA{0, 0, 0, 0},
+			image.Rect(0, 0, 1, 1),
+			[]uint8{0x00, 0x00, 0x00, 0x00},
+		},
+		{
+			"New 1x2 red",
+			1, 2,
+			color.NRGBA{255, 0, 0, 255},
+			image.Rect(0, 0, 1, 2),
+			[]uint8{0xff, 0x00, 0x00, 0xff, 0xff, 0x00, 0x00, 0xff},
+		},
+		{
+			"New 2x1 white",
+			2, 1,
+			color.NRGBA{255, 255, 255, 255},
+			image.Rect(0, 0, 2, 1),
+			[]uint8{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff},
+		},
+	}
+
+	for _, d := range td {
+		got := New(d.w, d.h, d.c)
+		want := image.NewNRGBA(d.dstBounds)
+		want.Pix = d.dstPix
+		if !compareNRGBA(got, want, 0) {
+			t.Errorf("test [%s] failed: %#v", d.desc, got)
+		}
+	}
+}
+
+func TestClone(t *testing.T) {
+	td := []struct {
+		desc string
+		src  image.Image
+		want *image.NRGBA
+	}{
+		{
+			"Clone NRGBA",
+			&image.NRGBA{
+				Rect:   image.Rect(-1, -1, 0, 1),
+				Stride: 1 * 4,
+				Pix:    []uint8{0x00, 0x11, 0x22, 0x33, 0xcc, 0xdd, 0xee, 0xff},
+			},
+			&image.NRGBA{
+				Rect:   image.Rect(0, 0, 1, 2),
+				Stride: 1 * 4,
+				Pix:    []uint8{0x00, 0x11, 0x22, 0x33, 0xcc, 0xdd, 0xee, 0xff},
+			},
+		},
+		{
+			"Clone NRGBA64",
+			&image.NRGBA64{
+				Rect:   image.Rect(-1, -1, 0, 1),
+				Stride: 1 * 8,
+				Pix: []uint8{
+					0x00, 0x00, 0x11, 0x11, 0x22, 0x22, 0x33, 0x33,
+					0xcc, 0xcc, 0xdd, 0xdd, 0xee, 0xee, 0xff, 0xff,
+				},
+			},
+			&image.NRGBA{
+				Rect:   image.Rect(0, 0, 1, 2),
+				Stride: 1 * 4,
+				Pix:    []uint8{0x00, 0x11, 0x22, 0x33, 0xcc, 0xdd, 0xee, 0xff},
+			},
+		},
+		{
+			"Clone RGBA",
+			&image.RGBA{
+				Rect:   image.Rect(-1, -1, 0, 1),
+				Stride: 1 * 4,
+				Pix:    []uint8{0x00, 0x11, 0x22, 0x33, 0xcc, 0xdd, 0xee, 0xff},
+			},
+			&image.NRGBA{
+				Rect:   image.Rect(0, 0, 1, 2),
+				Stride: 1 * 4,
+				Pix:    []uint8{0x00, 0x55, 0xaa, 0x33, 0xcc, 0xdd, 0xee, 0xff},
+			},
+		},
+		{
+			"Clone RGBA64",
+			&image.RGBA64{
+				Rect:   image.Rect(-1, -1, 0, 1),
+				Stride: 1 * 8,
+				Pix: []uint8{
+					0x00, 0x00, 0x11, 0x11, 0x22, 0x22, 0x33, 0x33,
+					0xcc, 0xcc, 0xdd, 0xdd, 0xee, 0xee, 0xff, 0xff,
+				},
+			},
+			&image.NRGBA{
+				Rect:   image.Rect(0, 0, 1, 2),
+				Stride: 1 * 4,
+				Pix:    []uint8{0x00, 0x55, 0xaa, 0x33, 0xcc, 0xdd, 0xee, 0xff},
+			},
+		},
+		{
+			"Clone Gray",
+			&image.Gray{
+				Rect:   image.Rect(-1, -1, 0, 1),
+				Stride: 1 * 1,
+				Pix:    []uint8{0x11, 0xee},
+			},
+			&image.NRGBA{
+				Rect:   image.Rect(0, 0, 1, 2),
+				Stride: 1 * 4,
+				Pix:    []uint8{0x11, 0x11, 0x11, 0xff, 0xee, 0xee, 0xee, 0xff},
+			},
+		},
+		{
+			"Clone Gray16",
+			&image.Gray16{
+				Rect:   image.Rect(-1, -1, 0, 1),
+				Stride: 1 * 2,
+				Pix:    []uint8{0x11, 0x11, 0xee, 0xee},
+			},
+			&image.NRGBA{
+				Rect:   image.Rect(0, 0, 1, 2),
+				Stride: 1 * 4,
+				Pix:    []uint8{0x11, 0x11, 0x11, 0xff, 0xee, 0xee, 0xee, 0xff},
+			},
+		},
+		{
+			"Clone Alpha",
+			&image.Alpha{
+				Rect:   image.Rect(-1, -1, 0, 1),
+				Stride: 1 * 1,
+				Pix:    []uint8{0x11, 0xee},
+			},
+			&image.NRGBA{
+				Rect:   image.Rect(0, 0, 1, 2),
+				Stride: 1 * 4,
+				Pix:    []uint8{0xff, 0xff, 0xff, 0x11, 0xff, 0xff, 0xff, 0xee},
+			},
+		},
+		{
+			"Clone YCbCr",
+			&image.YCbCr{
+				Rect:           image.Rect(-1, -1, 5, 0),
+				SubsampleRatio: image.YCbCrSubsampleRatio444,
+				YStride:        6,
+				CStride:        6,
+				Y:              []uint8{0x00, 0xff, 0x7f, 0x26, 0x4b, 0x0e},
+				Cb:             []uint8{0x80, 0x80, 0x80, 0x6b, 0x56, 0xc0},
+				Cr:             []uint8{0x80, 0x80, 0x80, 0xc0, 0x4b, 0x76},
+			},
+			&image.NRGBA{
+				Rect:   image.Rect(0, 0, 6, 1),
+				Stride: 6 * 4,
+				Pix: []uint8{
+					0x00, 0x00, 0x00, 0xff,
+					0xff, 0xff, 0xff, 0xff,
+					0x7f, 0x7f, 0x7f, 0xff,
+					0x7f, 0x00, 0x00, 0xff,
+					0x00, 0x7f, 0x00, 0xff,
+					0x00, 0x00, 0x7f, 0xff,
+				},
+			},
+		},
+		{
+			"Clone YCbCr 444",
+			&image.YCbCr{
+				Y:              []uint8{0x4c, 0x69, 0x1d, 0xb1, 0x96, 0xe2, 0x26, 0x34, 0xe, 0x59, 0x4b, 0x71, 0x0, 0x4c, 0x99, 0xff},
+				Cb:             []uint8{0x55, 0xd4, 0xff, 0x8e, 0x2c, 0x01, 0x6b, 0xaa, 0xc0, 0x95, 0x56, 0x40, 0x80, 0x80, 0x80, 0x80},
+				Cr:             []uint8{0xff, 0xeb, 0x6b, 0x36, 0x15, 0x95, 0xc0, 0xb5, 0x76, 0x41, 0x4b, 0x8c, 0x80, 0x80, 0x80, 0x80},
+				YStride:        4,
+				CStride:        4,
+				SubsampleRatio: image.YCbCrSubsampleRatio444,
+				Rect:           image.Rectangle{Min: image.Point{X: 0, Y: 0}, Max: image.Point{X: 4, Y: 4}},
+			},
+			&image.NRGBA{
+				Pix:    []uint8{0xff, 0x0, 0x0, 0xff, 0xff, 0x0, 0xff, 0xff, 0x0, 0x0, 0xff, 0xff, 0x49, 0xe1, 0xca, 0xff, 0x0, 0xff, 0x0, 0xff, 0xff, 0xff, 0x0, 0xff, 0x7f, 0x0, 0x0, 0xff, 0x7f, 0x0, 0x7f, 0xff, 0x0, 0x0, 0x7f, 0xff, 0x0, 0x7f, 0x7f, 0xff, 0x0, 0x7f, 0x0, 0xff, 0x82, 0x7f, 0x0, 0xff, 0x0, 0x0, 0x0, 0xff, 0x4c, 0x4c, 0x4c, 0xff, 0x99, 0x99, 0x99, 0xff, 0xff, 0xff, 0xff, 0xff},
+				Stride: 16,
+				Rect:   image.Rectangle{Min: image.Point{X: 0, Y: 0}, Max: image.Point{X: 4, Y: 4}},
+			},
+		},
+		{
+			"Clone YCbCr 440",
+			&image.YCbCr{
+				Y:              []uint8{0x4c, 0x69, 0x1d, 0xb1, 0x96, 0xe2, 0x26, 0x34, 0xe, 0x59, 0x4b, 0x71, 0x0, 0x4c, 0x99, 0xff},
+				Cb:             []uint8{0x2c, 0x01, 0x6b, 0xaa, 0x80, 0x80, 0x80, 0x80},
+				Cr:             []uint8{0x15, 0x95, 0xc0, 0xb5, 0x80, 0x80, 0x80, 0x80},
+				YStride:        4,
+				CStride:        4,
+				SubsampleRatio: image.YCbCrSubsampleRatio440,
+				Rect:           image.Rectangle{Min: image.Point{X: 0, Y: 0}, Max: image.Point{X: 4, Y: 4}},
+			},
+			&image.NRGBA{
+				Pix:    []uint8{0x0, 0xb5, 0x0, 0xff, 0x86, 0x86, 0x0, 0xff, 0x77, 0x0, 0x0, 0xff, 0xfb, 0x7d, 0xfb, 0xff, 0x0, 0xff, 0x1, 0xff, 0xff, 0xff, 0x1, 0xff, 0x80, 0x0, 0x1, 0xff, 0x7e, 0x0, 0x7e, 0xff, 0xe, 0xe, 0xe, 0xff, 0x59, 0x59, 0x59, 0xff, 0x4b, 0x4b, 0x4b, 0xff, 0x71, 0x71, 0x71, 0xff, 0x0, 0x0, 0x0, 0xff, 0x4c, 0x4c, 0x4c, 0xff, 0x99, 0x99, 0x99, 0xff, 0xff, 0xff, 0xff, 0xff},
+				Stride: 16,
+				Rect:   image.Rectangle{Min: image.Point{X: 0, Y: 0}, Max: image.Point{X: 4, Y: 4}},
+			},
+		},
+		{
+			"Clone YCbCr 422",
+			&image.YCbCr{
+				Y:              []uint8{0x4c, 0x69, 0x1d, 0xb1, 0x96, 0xe2, 0x26, 0x34, 0xe, 0x59, 0x4b, 0x71, 0x0, 0x4c, 0x99, 0xff},
+				Cb:             []uint8{0xd4, 0x8e, 0x01, 0xaa, 0x95, 0x40, 0x80, 0x80},
+				Cr:             []uint8{0xeb, 0x36, 0x95, 0xb5, 0x41, 0x8c, 0x80, 0x80},
+				YStride:        4,
+				CStride:        2,
+				SubsampleRatio: image.YCbCrSubsampleRatio422,
+				Rect:           image.Rectangle{Min: image.Point{X: 0, Y: 0}, Max: image.Point{X: 4, Y: 4}},
+			},
+			&image.NRGBA{
+				Pix:    []uint8{0xe2, 0x0, 0xe1, 0xff, 0xff, 0x0, 0xfe, 0xff, 0x0, 0x4d, 0x36, 0xff, 0x49, 0xe1, 0xca, 0xff, 0xb3, 0xb3, 0x0, 0xff, 0xff, 0xff, 0x1, 0xff, 0x70, 0x0, 0x70, 0xff, 0x7e, 0x0, 0x7e, 0xff, 0x0, 0x34, 0x33, 0xff, 0x1, 0x7f, 0x7e, 0xff, 0x5c, 0x58, 0x0, 0xff, 0x82, 0x7e, 0x0, 0xff, 0x0, 0x0, 0x0, 0xff, 0x4c, 0x4c, 0x4c, 0xff, 0x99, 0x99, 0x99, 0xff, 0xff, 0xff, 0xff, 0xff},
+				Stride: 16,
+				Rect:   image.Rectangle{Min: image.Point{X: 0, Y: 0}, Max: image.Point{X: 4, Y: 4}},
+			},
+		},
+		{
+			"Clone YCbCr 420",
+			&image.YCbCr{
+				Y:       []uint8{0x4c, 0x69, 0x1d, 0xb1, 0x96, 0xe2, 0x26, 0x34, 0xe, 0x59, 0x4b, 0x71, 0x0, 0x4c, 0x99, 0xff},
+				Cb:      []uint8{0x01, 0xaa, 0x80, 0x80},
+				Cr:      []uint8{0x95, 0xb5, 0x80, 0x80},
+				YStride: 4, CStride: 2,
+				SubsampleRatio: image.YCbCrSubsampleRatio420,
+				Rect:           image.Rectangle{Min: image.Point{X: 0, Y: 0}, Max: image.Point{X: 4, Y: 4}},
+			},
+			&image.NRGBA{
+				Pix:    []uint8{0x69, 0x69, 0x0, 0xff, 0x86, 0x86, 0x0, 0xff, 0x67, 0x0, 0x67, 0xff, 0xfb, 0x7d, 0xfb, 0xff, 0xb3, 0xb3, 0x0, 0xff, 0xff, 0xff, 0x1, 0xff, 0x70, 0x0, 0x70, 0xff, 0x7e, 0x0, 0x7e, 0xff, 0xe, 0xe, 0xe, 0xff, 0x59, 0x59, 0x59, 0xff, 0x4b, 0x4b, 0x4b, 0xff, 0x71, 0x71, 0x71, 0xff, 0x0, 0x0, 0x0, 0xff, 0x4c, 0x4c, 0x4c, 0xff, 0x99, 0x99, 0x99, 0xff, 0xff, 0xff, 0xff, 0xff},
+				Stride: 16,
+				Rect:   image.Rectangle{Min: image.Point{X: 0, Y: 0}, Max: image.Point{X: 4, Y: 4}},
+			},
+		},
+		{
+			"Clone Paletted",
+			&image.Paletted{
+				Rect:   image.Rect(-1, -1, 5, 0),
+				Stride: 6 * 1,
+				Palette: color.Palette{
+					color.NRGBA{R: 0x00, G: 0x00, B: 0x00, A: 0xff},
+					color.NRGBA{R: 0xff, G: 0xff, B: 0xff, A: 0xff},
+					color.NRGBA{R: 0x7f, G: 0x7f, B: 0x7f, A: 0xff},
+					color.NRGBA{R: 0x7f, G: 0x00, B: 0x00, A: 0xff},
+					color.NRGBA{R: 0x00, G: 0x7f, B: 0x00, A: 0xff},
+					color.NRGBA{R: 0x00, G: 0x00, B: 0x7f, A: 0xff},
+				},
+				Pix: []uint8{0x0, 0x1, 0x2, 0x3, 0x4, 0x5},
+			},
+			&image.NRGBA{
+				Rect:   image.Rect(0, 0, 6, 1),
+				Stride: 6 * 4,
+				Pix: []uint8{
+					0x00, 0x00, 0x00, 0xff,
+					0xff, 0xff, 0xff, 0xff,
+					0x7f, 0x7f, 0x7f, 0xff,
+					0x7f, 0x00, 0x00, 0xff,
+					0x00, 0x7f, 0x00, 0xff,
+					0x00, 0x00, 0x7f, 0xff,
+				},
+			},
+		},
+	}
+
+	for _, d := range td {
+		got := Clone(d.src)
+		want := d.want
+
+		delta := 0
+		if _, ok := d.src.(*image.YCbCr); ok {
+			delta = 1
+		}
+
+		if !compareNRGBA(got, want, delta) {
+			t.Errorf("test [%s] failed: %#v", d.desc, got)
+		}
+	}
+}

vendor/src/github.com/disintegration/imaging/resize.go

@@ -0,0 +1,564 @@
+package imaging
+
+import (
+	"image"
+	"math"
+)
+
+type iwpair struct {
+	i int
+	w int32
+}
+
+type pweights struct {
+	iwpairs []iwpair
+	wsum    int32
+}
+
+func precomputeWeights(dstSize, srcSize int, filter ResampleFilter) []pweights {
+	du := float64(srcSize) / float64(dstSize)
+	scale := du
+	if scale < 1.0 {
+		scale = 1.0
+	}
+	ru := math.Ceil(scale * filter.Support)
+
+	out := make([]pweights, dstSize)
+
+	for v := 0; v < dstSize; v++ {
+		fu := (float64(v)+0.5)*du - 0.5
+
+		startu := int(math.Ceil(fu - ru))
+		if startu < 0 {
+			startu = 0
+		}
+		endu := int(math.Floor(fu + ru))
+		if endu > srcSize-1 {
+			endu = srcSize - 1
+		}
+
+		wsum := int32(0)
+		for u := startu; u <= endu; u++ {
+			w := int32(0xff * filter.Kernel((float64(u)-fu)/scale))
+			if w != 0 {
+				wsum += w
+				out[v].iwpairs = append(out[v].iwpairs, iwpair{u, w})
+			}
+		}
+		out[v].wsum = wsum
+	}
+
+	return out
+}
+
+// Resize resizes the image to the specified width and height using the specified resampling
+// filter and returns the transformed image. If one of width or height is 0, the image aspect
+// ratio is preserved.
+//
+// Supported resample filters: NearestNeighbor, Box, Linear, Hermite, MitchellNetravali,
+// CatmullRom, BSpline, Gaussian, Lanczos, Hann, Hamming, Blackman, Bartlett, Welch, Cosine.
+//
+// Usage example:
+//
+//		dstImage := imaging.Resize(srcImage, 800, 600, imaging.Lanczos)
+//
+func Resize(img image.Image, width, height int, filter ResampleFilter) *image.NRGBA {
+	dstW, dstH := width, height
+
+	if dstW < 0 || dstH < 0 {
+		return &image.NRGBA{}
+	}
+	if dstW == 0 && dstH == 0 {
+		return &image.NRGBA{}
+	}
+
+	src := toNRGBA(img)
+
+	srcW := src.Bounds().Max.X
+	srcH := src.Bounds().Max.Y
+
+	if srcW <= 0 || srcH <= 0 {
+		return &image.NRGBA{}
+	}
+
+	// if new width or height is 0 then preserve aspect ratio, minimum 1px
+	if dstW == 0 {
+		tmpW := float64(dstH) * float64(srcW) / float64(srcH)
+		dstW = int(math.Max(1.0, math.Floor(tmpW+0.5)))
+	}
+	if dstH == 0 {
+		tmpH := float64(dstW) * float64(srcH) / float64(srcW)
+		dstH = int(math.Max(1.0, math.Floor(tmpH+0.5)))
+	}
+
+	var dst *image.NRGBA
+
+	if filter.Support <= 0.0 {
+		// nearest-neighbor special case
+		dst = resizeNearest(src, dstW, dstH)
+
+	} else {
+		// two-pass resize
+		if srcW != dstW {
+			dst = resizeHorizontal(src, dstW, filter)
+		} else {
+			dst = src
+		}
+
+		if srcH != dstH {
+			dst = resizeVertical(dst, dstH, filter)
+		}
+	}
+
+	return dst
+}
+
+func resizeHorizontal(src *image.NRGBA, width int, filter ResampleFilter) *image.NRGBA {
+	srcBounds := src.Bounds()
+	srcW := srcBounds.Max.X
+	srcH := srcBounds.Max.Y
+
+	dstW := width
+	dstH := srcH
+
+	dst := image.NewNRGBA(image.Rect(0, 0, dstW, dstH))
+
+	weights := precomputeWeights(dstW, srcW, filter)
+
+	parallel(dstH, func(partStart, partEnd int) {
+		for dstY := partStart; dstY < partEnd; dstY++ {
+			for dstX := 0; dstX < dstW; dstX++ {
+				var c [4]int32
+				for _, iw := range weights[dstX].iwpairs {
+					i := dstY*src.Stride + iw.i*4
+					c[0] += int32(src.Pix[i+0]) * iw.w
+					c[1] += int32(src.Pix[i+1]) * iw.w
+					c[2] += int32(src.Pix[i+2]) * iw.w
+					c[3] += int32(src.Pix[i+3]) * iw.w
+				}
+				j := dstY*dst.Stride + dstX*4
+				sum := weights[dstX].wsum
+				dst.Pix[j+0] = clampint32(int32(float32(c[0])/float32(sum) + 0.5))
+				dst.Pix[j+1] = clampint32(int32(float32(c[1])/float32(sum) + 0.5))
+				dst.Pix[j+2] = clampint32(int32(float32(c[2])/float32(sum) + 0.5))
+				dst.Pix[j+3] = clampint32(int32(float32(c[3])/float32(sum) + 0.5))
+			}
+		}
+	})
+
+	return dst
+}
+
+func resizeVertical(src *image.NRGBA, height int, filter ResampleFilter) *image.NRGBA {
+	srcBounds := src.Bounds()
+	srcW := srcBounds.Max.X
+	srcH := srcBounds.Max.Y
+
+	dstW := srcW
+	dstH := height
+
+	dst := image.NewNRGBA(image.Rect(0, 0, dstW, dstH))
+
+	weights := precomputeWeights(dstH, srcH, filter)
+
+	parallel(dstW, func(partStart, partEnd int) {
+
+		for dstX := partStart; dstX < partEnd; dstX++ {
+			for dstY := 0; dstY < dstH; dstY++ {
+				var c [4]int32
+				for _, iw := range weights[dstY].iwpairs {
+					i := iw.i*src.Stride + dstX*4
+					c[0] += int32(src.Pix[i+0]) * iw.w
+					c[1] += int32(src.Pix[i+1]) * iw.w
+					c[2] += int32(src.Pix[i+2]) * iw.w
+					c[3] += int32(src.Pix[i+3]) * iw.w
+				}
+				j := dstY*dst.Stride + dstX*4
+				sum := weights[dstY].wsum
+				dst.Pix[j+0] = clampint32(int32(float32(c[0])/float32(sum) + 0.5))
+				dst.Pix[j+1] = clampint32(int32(float32(c[1])/float32(sum) + 0.5))
+				dst.Pix[j+2] = clampint32(int32(float32(c[2])/float32(sum) + 0.5))
+				dst.Pix[j+3] = clampint32(int32(float32(c[3])/float32(sum) + 0.5))
+			}
+		}
+
+	})
+
+	return dst
+}
+
+// fast nearest-neighbor resize, no filtering
+func resizeNearest(src *image.NRGBA, width, height int) *image.NRGBA {
+	dstW, dstH := width, height
+
+	srcBounds := src.Bounds()
+	srcW := srcBounds.Max.X
+	srcH := srcBounds.Max.Y
+
+	dst := image.NewNRGBA(image.Rect(0, 0, dstW, dstH))
+
+	dx := float64(srcW) / float64(dstW)
+	dy := float64(srcH) / float64(dstH)
+
+	parallel(dstH, func(partStart, partEnd int) {
+
+		for dstY := partStart; dstY < partEnd; dstY++ {
+			fy := (float64(dstY)+0.5)*dy - 0.5
+
+			for dstX := 0; dstX < dstW; dstX++ {
+				fx := (float64(dstX)+0.5)*dx - 0.5
+
+				srcX := int(math.Min(math.Max(math.Floor(fx+0.5), 0.0), float64(srcW)))
+				srcY := int(math.Min(math.Max(math.Floor(fy+0.5), 0.0), float64(srcH)))
+
+				srcOff := srcY*src.Stride + srcX*4
+				dstOff := dstY*dst.Stride + dstX*4
+
+				copy(dst.Pix[dstOff:dstOff+4], src.Pix[srcOff:srcOff+4])
+			}
+		}
+
+	})
+
+	return dst
+}
+
+// Fit scales down the image using the specified resample filter to fit the specified
+// maximum width and height and returns the transformed image.
+//
+// Supported resample filters: NearestNeighbor, Box, Linear, Hermite, MitchellNetravali,
+// CatmullRom, BSpline, Gaussian, Lanczos, Hann, Hamming, Blackman, Bartlett, Welch, Cosine.
+//
+// Usage example:
+//
+//		dstImage := imaging.Fit(srcImage, 800, 600, imaging.Lanczos)
+//
+func Fit(img image.Image, width, height int, filter ResampleFilter) *image.NRGBA {
+	maxW, maxH := width, height
+
+	if maxW <= 0 || maxH <= 0 {
+		return &image.NRGBA{}
+	}
+
+	srcBounds := img.Bounds()
+	srcW := srcBounds.Dx()
+	srcH := srcBounds.Dy()
+
+	if srcW <= 0 || srcH <= 0 {
+		return &image.NRGBA{}
+	}
+
+	if srcW <= maxW && srcH <= maxH {
+		return Clone(img)
+	}
+
+	srcAspectRatio := float64(srcW) / float64(srcH)
+	maxAspectRatio := float64(maxW) / float64(maxH)
+
+	var newW, newH int
+	if srcAspectRatio > maxAspectRatio {
+		newW = maxW
+		newH = int(float64(newW) / srcAspectRatio)
+	} else {
+		newH = maxH
+		newW = int(float64(newH) * srcAspectRatio)
+	}
+
+	return Resize(img, newW, newH, filter)
+}
+
+// Thumbnail scales the image up or down using the specified resample filter, crops it
+// to the specified width and hight and returns the transformed image.
+//
+// Supported resample filters: NearestNeighbor, Box, Linear, Hermite, MitchellNetravali,
+// CatmullRom, BSpline, Gaussian, Lanczos, Hann, Hamming, Blackman, Bartlett, Welch, Cosine.
+//
+// Usage example:
+//
+//		dstImage := imaging.Thumbnail(srcImage, 100, 100, imaging.Lanczos)
+//
+func Thumbnail(img image.Image, width, height int, filter ResampleFilter) *image.NRGBA {
+	thumbW, thumbH := width, height
+
+	if thumbW <= 0 || thumbH <= 0 {
+		return &image.NRGBA{}
+	}
+
+	srcBounds := img.Bounds()
+	srcW := srcBounds.Dx()
+	srcH := srcBounds.Dy()
+
+	if srcW <= 0 || srcH <= 0 {
+		return &image.NRGBA{}
+	}
+
+	srcAspectRatio := float64(srcW) / float64(srcH)
+	thumbAspectRatio := float64(thumbW) / float64(thumbH)
+
+	var tmp image.Image
+	if srcAspectRatio > thumbAspectRatio {
+		tmp = Resize(img, 0, thumbH, filter)
+	} else {
+		tmp = Resize(img, thumbW, 0, filter)
+	}
+
+	return CropCenter(tmp, thumbW, thumbH)
+}
+
+// Resample filter struct. It can be used to make custom filters.
+//
+// Supported resample filters: NearestNeighbor, Box, Linear, Hermite, MitchellNetravali,
+// CatmullRom, BSpline, Gaussian, Lanczos, Hann, Hamming, Blackman, Bartlett, Welch, Cosine.
+//
+//	General filter recommendations:
+//
+//	- Lanczos
+//		Probably the best resampling filter for photographic images yielding sharp results,
+//		but it's slower than cubic filters (see below).
+//
+//	- CatmullRom
+//		A sharp cubic filter. It's a good filter for both upscaling and downscaling if sharp results are needed.
+//
+//	- MitchellNetravali
+//		A high quality cubic filter that produces smoother results with less ringing than CatmullRom.
+//
+//	- BSpline
+//		A good filter if a very smooth output is needed.
+//
+//	- Linear
+//		Bilinear interpolation filter, produces reasonably good, smooth output. It's faster than cubic filters.
+//
+//	- Box
+//		Simple and fast resampling filter appropriate for downscaling.
+//		When upscaling it's similar to NearestNeighbor.
+//
+//	- NearestNeighbor
+//		Fastest resample filter, no antialiasing at all. Rarely used.
+//
+type ResampleFilter struct {
+	Support float64
+	Kernel  func(float64) float64
+}
+
+// Nearest-neighbor filter, no anti-aliasing.
+var NearestNeighbor ResampleFilter
+
+// Box filter (averaging pixels).
+var Box ResampleFilter
+
+// Linear filter.
+var Linear ResampleFilter
+
+// Hermite cubic spline filter (BC-spline; B=0; C=0).
+var Hermite ResampleFilter
+
+// Mitchell-Netravali cubic filter (BC-spline; B=1/3; C=1/3).
+var MitchellNetravali ResampleFilter
+
+// Catmull-Rom - sharp cubic filter (BC-spline; B=0; C=0.5).
+var CatmullRom ResampleFilter
+
+// Cubic B-spline - smooth cubic filter (BC-spline; B=1; C=0).
+var BSpline ResampleFilter
+
+// Gaussian Blurring Filter.
+var Gaussian ResampleFilter
+
+// Bartlett-windowed sinc filter (3 lobes).
+var Bartlett ResampleFilter
+
+// Lanczos filter (3 lobes).
+var Lanczos ResampleFilter
+
+// Hann-windowed sinc filter (3 lobes).
+var Hann ResampleFilter
+
+// Hamming-windowed sinc filter (3 lobes).
+var Hamming ResampleFilter
+
+// Blackman-windowed sinc filter (3 lobes).
+var Blackman ResampleFilter
+
+// Welch-windowed sinc filter (parabolic window, 3 lobes).
+var Welch ResampleFilter
+
+// Cosine-windowed sinc filter (3 lobes).
+var Cosine ResampleFilter
+
+func bcspline(x, b, c float64) float64 {
+	x = math.Abs(x)
+	if x < 1.0 {
+		return ((12-9*b-6*c)*x*x*x + (-18+12*b+6*c)*x*x + (6 - 2*b)) / 6
+	}
+	if x < 2.0 {
+		return ((-b-6*c)*x*x*x + (6*b+30*c)*x*x + (-12*b-48*c)*x + (8*b + 24*c)) / 6
+	}
+	return 0
+}
+
+func sinc(x float64) float64 {
+	if x == 0 {
+		return 1
+	}
+	return math.Sin(math.Pi*x) / (math.Pi * x)
+}
+
+func init() {
+	NearestNeighbor = ResampleFilter{
+		Support: 0.0, // special case - not applying the filter
+	}
+
+	Box = ResampleFilter{
+		Support: 0.5,
+		Kernel: func(x float64) float64 {
+			x = math.Abs(x)
+			if x <= 0.5 {
+				return 1.0
+			}
+			return 0
+		},
+	}
+
+	Linear = ResampleFilter{
+		Support: 1.0,
+		Kernel: func(x float64) float64 {
+			x = math.Abs(x)
+			if x < 1.0 {
+				return 1.0 - x
+			}
+			return 0
+		},
+	}
+
+	Hermite = ResampleFilter{
+		Support: 1.0,
+		Kernel: func(x float64) float64 {
+			x = math.Abs(x)
+			if x < 1.0 {
+				return bcspline(x, 0.0, 0.0)
+			}
+			return 0
+		},
+	}
+
+	MitchellNetravali = ResampleFilter{
+		Support: 2.0,
+		Kernel: func(x float64) float64 {
+			x = math.Abs(x)
+			if x < 2.0 {
+				return bcspline(x, 1.0/3.0, 1.0/3.0)
+			}
+			return 0
+		},
+	}
+
+	CatmullRom = ResampleFilter{
+		Support: 2.0,
+		Kernel: func(x float64) float64 {
+			x = math.Abs(x)
+			if x < 2.0 {
+				return bcspline(x, 0.0, 0.5)
+			}
+			return 0
+		},
+	}
+
+	BSpline = ResampleFilter{
+		Support: 2.0,
+		Kernel: func(x float64) float64 {
+			x = math.Abs(x)
+			if x < 2.0 {
+				return bcspline(x, 1.0, 0.0)
+			}
+			return 0
+		},
+	}
+
+	Gaussian = ResampleFilter{
+		Support: 2.0,
+		Kernel: func(x float64) float64 {
+			x = math.Abs(x)
+			if x < 2.0 {
+				return math.Exp(-2 * x * x)
+			}
+			return 0
+		},
+	}
+
+	Bartlett = ResampleFilter{
+		Support: 3.0,
+		Kernel: func(x float64) float64 {
+			x = math.Abs(x)
+			if x < 3.0 {
+				return sinc(x) * (3.0 - x) / 3.0
+			}
+			return 0
+		},
+	}
+
+	Lanczos = ResampleFilter{
+		Support: 3.0,
+		Kernel: func(x float64) float64 {
+			x = math.Abs(x)
+			if x < 3.0 {
+				return sinc(x) * sinc(x/3.0)
+			}
+			return 0
+		},
+	}
+
+	Hann = ResampleFilter{
+		Support: 3.0,
+		Kernel: func(x float64) float64 {
+			x = math.Abs(x)
+			if x < 3.0 {
+				return sinc(x) * (0.5 + 0.5*math.Cos(math.Pi*x/3.0))
+			}
+			return 0
+		},
+	}
+
+	Hamming = ResampleFilter{
+		Support: 3.0,
+		Kernel: func(x float64) float64 {
+			x = math.Abs(x)
+			if x < 3.0 {
+				return sinc(x) * (0.54 + 0.46*math.Cos(math.Pi*x/3.0))
+			}
+			return 0
+		},
+	}
+
+	Blackman = ResampleFilter{
+		Support: 3.0,
+		Kernel: func(x float64) float64 {
+			x = math.Abs(x)
+			if x < 3.0 {
+				return sinc(x) * (0.42 - 0.5*math.Cos(math.Pi*x/3.0+math.Pi) + 0.08*math.Cos(2.0*math.Pi*x/3.0))
+			}
+			return 0
+		},
+	}
+
+	Welch = ResampleFilter{
+		Support: 3.0,
+		Kernel: func(x float64) float64 {
+			x = math.Abs(x)
+			if x < 3.0 {
+				return sinc(x) * (1.0 - (x * x / 9.0))
+			}
+			return 0
+		},
+	}
+
+	Cosine = ResampleFilter{
+		Support: 3.0,
+		Kernel: func(x float64) float64 {
+			x = math.Abs(x)
+			if x < 3.0 {
+				return sinc(x) * math.Cos((math.Pi/2.0)*(x/3.0))
+			}
+			return 0
+		},
+	}
+}

vendor/src/github.com/disintegration/imaging/resize_test.go

@@ -0,0 +1,281 @@
+package imaging
+
+import (
+	"image"
+	"testing"
+)
+
+func TestResize(t *testing.T) {
+	td := []struct {
+		desc string
+		src  image.Image
+		w, h int
+		f    ResampleFilter
+		want *image.NRGBA
+	}{
+		{
+			"Resize 2x2 1x1 box",
+			&image.NRGBA{
+				Rect:   image.Rect(-1, -1, 1, 1),
+				Stride: 2 * 4,
+				Pix: []uint8{
+					0x00, 0x00, 0x00, 0x00, 0xff, 0x00, 0x00, 0xff,
+					0x00, 0xff, 0x00, 0xff, 0x00, 0x00, 0xff, 0xff,
+				},
+			},
+			1, 1,
+			Box,
+			&image.NRGBA{
+				Rect:   image.Rect(0, 0, 1, 1),
+				Stride: 1 * 4,
+				Pix:    []uint8{0x40, 0x40, 0x40, 0xc0},
+			},
+		},
+		{
+			"Resize 2x2 2x2 box",
+			&image.NRGBA{
+				Rect:   image.Rect(-1, -1, 1, 1),
+				Stride: 2 * 4,
+				Pix: []uint8{
+					0x00, 0x00, 0x00, 0x00, 0xff, 0x00, 0x00, 0xff,
+					0x00, 0xff, 0x00, 0xff, 0x00, 0x00, 0xff, 0xff,
+				},
+			},
+			2, 2,
+			Box,
+			&image.NRGBA{
+				Rect:   image.Rect(0, 0, 2, 2),
+				Stride: 2 * 4,
+				Pix: []uint8{
+					0x00, 0x00, 0x00, 0x00, 0xff, 0x00, 0x00, 0xff,
+					0x00, 0xff, 0x00, 0xff, 0x00, 0x00, 0xff, 0xff,
+				},
+			},
+		},
+		{
+			"Resize 3x1 1x1 nearest",
+			&image.NRGBA{
+				Rect:   image.Rect(-1, -1, 2, 0),
+				Stride: 3 * 4,
+				Pix: []uint8{
+					0xff, 0x00, 0x00, 0xff, 0x00, 0xff, 0x00, 0xff, 0x00, 0x00, 0xff, 0xff,
+				},
+			},
+			1, 1,
+			NearestNeighbor,
+			&image.NRGBA{
+				Rect:   image.Rect(0, 0, 1, 1),
+				Stride: 1 * 4,
+				Pix:    []uint8{0x00, 0xff, 0x00, 0xff},
+			},
+		},
+		{
+			"Resize 2x2 0x4 box",
+			&image.NRGBA{
+				Rect:   image.Rect(-1, -1, 1, 1),
+				Stride: 2 * 4,
+				Pix: []uint8{
+					0x00, 0x00, 0x00, 0x00, 0xff, 0x00, 0x00, 0xff,
+					0x00, 0xff, 0x00, 0xff, 0x00, 0x00, 0xff, 0xff,
+				},
+			},
+			0, 4,
+			Box,
+			&image.NRGBA{
+				Rect:   image.Rect(0, 0, 4, 4),
+				Stride: 4 * 4,
+				Pix: []uint8{
+					0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xff, 0x00, 0x00, 0xff, 0xff, 0x00, 0x00, 0xff,
+					0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xff, 0x00, 0x00, 0xff, 0xff, 0x00, 0x00, 0xff,
+					0x00, 0xff, 0x00, 0xff, 0x00, 0xff, 0x00, 0xff, 0x00, 0x00, 0xff, 0xff, 0x00, 0x00, 0xff, 0xff,
+					0x00, 0xff, 0x00, 0xff, 0x00, 0xff, 0x00, 0xff, 0x00, 0x00, 0xff, 0xff, 0x00, 0x00, 0xff, 0xff,
+				},
+			},
+		},
+		{
+			"Resize 2x2 4x0 linear",
+			&image.NRGBA{
+				Rect:   image.Rect(-1, -1, 1, 1),
+				Stride: 2 * 4,
+				Pix: []uint8{
+					0x00, 0x00, 0x00, 0x00, 0xff, 0x00, 0x00, 0xff,
+					0x00, 0xff, 0x00, 0xff, 0x00, 0x00, 0xff, 0xff,
+				},
+			},
+			4, 0,
+			Linear,
+			&image.NRGBA{
+				Rect:   image.Rect(0, 0, 4, 4),
+				Stride: 4 * 4,
+				Pix: []uint8{
+					0x00, 0x00, 0x00, 0x00, 0x40, 0x00, 0x00, 0x40, 0xbf, 0x00, 0x00, 0xbf, 0xff, 0x00, 0x00, 0xff,
+					0x00, 0x40, 0x00, 0x40, 0x30, 0x30, 0x10, 0x70, 0x8f, 0x10, 0x30, 0xcf, 0xbf, 0x00, 0x40, 0xff,
+					0x00, 0xbf, 0x00, 0xbf, 0x10, 0x8f, 0x30, 0xcf, 0x30, 0x30, 0x8f, 0xef, 0x40, 0x00, 0xbf, 0xff,
+					0x00, 0xff, 0x00, 0xff, 0x00, 0xbf, 0x40, 0xff, 0x00, 0x40, 0xbf, 0xff, 0x00, 0x00, 0xff, 0xff,
+				},
+			},
+		},
+	}
+	for _, d := range td {
+		got := Resize(d.src, d.w, d.h, d.f)
+		want := d.want
+		if !compareNRGBA(got, want, 1) {
+			t.Errorf("test [%s] failed: %#v", d.desc, got)
+		}
+	}
+}
+
+func TestFit(t *testing.T) {
+	td := []struct {
+		desc string
+		src  image.Image
+		w, h int
+		f    ResampleFilter
+		want *image.NRGBA
+	}{
+		{
+			"Fit 2x2 1x10 box",
+			&image.NRGBA{
+				Rect:   image.Rect(-1, -1, 1, 1),
+				Stride: 2 * 4,
+				Pix: []uint8{
+					0x00, 0x00, 0x00, 0x00, 0xff, 0x00, 0x00, 0xff,
+					0x00, 0xff, 0x00, 0xff, 0x00, 0x00, 0xff, 0xff,
+				},
+			},
+			1, 10,
+			Box,
+			&image.NRGBA{
+				Rect:   image.Rect(0, 0, 1, 1),
+				Stride: 1 * 4,
+				Pix:    []uint8{0x40, 0x40, 0x40, 0xc0},
+			},
+		},
+		{
+			"Fit 2x2 10x1 box",
+			&image.NRGBA{
+				Rect:   image.Rect(-1, -1, 1, 1),
+				Stride: 2 * 4,
+				Pix: []uint8{
+					0x00, 0x00, 0x00, 0x00, 0xff, 0x00, 0x00, 0xff,
+					0x00, 0xff, 0x00, 0xff, 0x00, 0x00, 0xff, 0xff,
+				},
+			},
+			10, 1,
+			Box,
+			&image.NRGBA{
+				Rect:   image.Rect(0, 0, 1, 1),
+				Stride: 1 * 4,
+				Pix:    []uint8{0x40, 0x40, 0x40, 0xc0},
+			},
+		},
+		{
+			"Fit 2x2 10x10 box",
+			&image.NRGBA{
+				Rect:   image.Rect(-1, -1, 1, 1),
+				Stride: 2 * 4,
+				Pix: []uint8{
+					0x00, 0x00, 0x00, 0x00, 0xff, 0x00, 0x00, 0xff,
+					0x00, 0xff, 0x00, 0xff, 0x00, 0x00, 0xff, 0xff,
+				},
+			},
+			10, 10,
+			Box,
+			&image.NRGBA{
+				Rect:   image.Rect(0, 0, 2, 2),
+				Stride: 2 * 4,
+				Pix: []uint8{
+					0x00, 0x00, 0x00, 0x00, 0xff, 0x00, 0x00, 0xff,
+					0x00, 0xff, 0x00, 0xff, 0x00, 0x00, 0xff, 0xff,
+				},
+			},
+		},
+	}
+	for _, d := range td {
+		got := Fit(d.src, d.w, d.h, d.f)
+		want := d.want
+		if !compareNRGBA(got, want, 0) {
+			t.Errorf("test [%s] failed: %#v", d.desc, got)
+		}
+	}
+}
+
+func TestThumbnail(t *testing.T) {
+	td := []struct {
+		desc string
+		src  image.Image
+		w, h int
+		f    ResampleFilter
+		want *image.NRGBA
+	}{
+		{
+			"Thumbnail 6x2 1x1 box",
+			&image.NRGBA{
+				Rect:   image.Rect(-1, -1, 5, 1),
+				Stride: 6 * 4,
+				Pix: []uint8{
+					0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00, 0x00, 0x00, 0x00, 0xff, 0x00, 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
+					0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00, 0xff, 0x00, 0xff, 0x00, 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
+				},
+			},
+			1, 1,
+			Box,
+			&image.NRGBA{
+				Rect:   image.Rect(0, 0, 1, 1),
+				Stride: 1 * 4,
+				Pix:    []uint8{0x40, 0x40, 0x40, 0xc0},
+			},
+		},
+		{
+			"Thumbnail 2x6 1x1 box",
+			&image.NRGBA{
+				Rect:   image.Rect(-1, -1, 1, 5),
+				Stride: 2 * 4,
+				Pix: []uint8{
+					0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
+					0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
+					0x00, 0x00, 0x00, 0x00, 0xff, 0x00, 0x00, 0xff,
+					0x00, 0xff, 0x00, 0xff, 0x00, 0x00, 0xff, 0xff,
+					0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
+					0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
+				},
+			},
+			1, 1,
+			Box,
+			&image.NRGBA{
+				Rect:   image.Rect(0, 0, 1, 1),
+				Stride: 1 * 4,
+				Pix:    []uint8{0x40, 0x40, 0x40, 0xc0},
+			},
+		},
+		{
+			"Thumbnail 1x3 2x2 box",
+			&image.NRGBA{
+				Rect:   image.Rect(-1, -1, 0, 2),
+				Stride: 1 * 4,
+				Pix: []uint8{
+					0x00, 0x00, 0x00, 0x00,
+					0xff, 0x00, 0x00, 0xff,
+					0xff, 0xff, 0xff, 0xff,
+				},
+			},
+			2, 2,
+			Box,
+			&image.NRGBA{
+				Rect:   image.Rect(0, 0, 2, 2),
+				Stride: 2 * 4,
+				Pix: []uint8{
+					0xff, 0x00, 0x00, 0xff, 0xff, 0x00, 0x00, 0xff,
+					0xff, 0x00, 0x00, 0xff, 0xff, 0x00, 0x00, 0xff,
+				},
+			},
+		},
+	}
+	for _, d := range td {
+		got := Thumbnail(d.src, d.w, d.h, d.f)
+		want := d.want
+		if !compareNRGBA(got, want, 0) {
+			t.Errorf("test [%s] failed: %#v", d.desc, got)
+		}
+	}
+}

vendor/src/github.com/disintegration/imaging/tools.go

@@ -0,0 +1,139 @@
+package imaging
+
+import (
+	"image"
+	"math"
+)
+
+// Crop cuts out a rectangular region with the specified bounds
+// from the image and returns the cropped image.
+func Crop(img image.Image, rect image.Rectangle) *image.NRGBA {
+	src := toNRGBA(img)
+	srcRect := rect.Sub(img.Bounds().Min)
+	sub := src.SubImage(srcRect)
+	return Clone(sub) // New image Bounds().Min point will be (0, 0)
+}
+
+// CropCenter cuts out a rectangular region with the specified size
+// from the center of the image and returns the cropped image.
+func CropCenter(img image.Image, width, height int) *image.NRGBA {
+	cropW, cropH := width, height
+
+	srcBounds := img.Bounds()
+	srcW := srcBounds.Dx()
+	srcH := srcBounds.Dy()
+	srcMinX := srcBounds.Min.X
+	srcMinY := srcBounds.Min.Y
+
+	centerX := srcMinX + srcW/2
+	centerY := srcMinY + srcH/2
+
+	x0 := centerX - cropW/2
+	y0 := centerY - cropH/2
+	x1 := x0 + cropW
+	y1 := y0 + cropH
+
+	return Crop(img, image.Rect(x0, y0, x1, y1))
+}
+
+// Paste pastes the img image to the background image at the specified position and returns the combined image.
+func Paste(background, img image.Image, pos image.Point) *image.NRGBA {
+	src := toNRGBA(img)
+	dst := Clone(background)                    // cloned image bounds start at (0, 0)
+	startPt := pos.Sub(background.Bounds().Min) // so we should translate start point
+	endPt := startPt.Add(src.Bounds().Size())
+	pasteBounds := image.Rectangle{startPt, endPt}
+
+	if dst.Bounds().Overlaps(pasteBounds) {
+		intersectBounds := dst.Bounds().Intersect(pasteBounds)
+
+		rowSize := intersectBounds.Dx() * 4
+		numRows := intersectBounds.Dy()
+
+		srcStartX := intersectBounds.Min.X - pasteBounds.Min.X
+		srcStartY := intersectBounds.Min.Y - pasteBounds.Min.Y
+
+		i0 := dst.PixOffset(intersectBounds.Min.X, intersectBounds.Min.Y)
+		j0 := src.PixOffset(srcStartX, srcStartY)
+
+		di := dst.Stride
+		dj := src.Stride
+
+		for row := 0; row < numRows; row++ {
+			copy(dst.Pix[i0:i0+rowSize], src.Pix[j0:j0+rowSize])
+			i0 += di
+			j0 += dj
+		}
+	}
+
+	return dst
+}
+
+// PasteCenter pastes the img image to the center of the background image and returns the combined image.
+func PasteCenter(background, img image.Image) *image.NRGBA {
+	bgBounds := background.Bounds()
+	bgW := bgBounds.Dx()
+	bgH := bgBounds.Dy()
+	bgMinX := bgBounds.Min.X
+	bgMinY := bgBounds.Min.Y
+
+	centerX := bgMinX + bgW/2
+	centerY := bgMinY + bgH/2
+
+	x0 := centerX - img.Bounds().Dx()/2
+	y0 := centerY - img.Bounds().Dy()/2
+
+	return Paste(background, img, image.Pt(x0, y0))
+}
+
+// Overlay draws the img image over the background image at given position
+// and returns the combined image. Opacity parameter is the opacity of the img
+// image layer, used to compose the images, it must be from 0.0 to 1.0.
+//
+// Usage examples:
+//
+//		// draw the sprite over the background at position (50, 50)
+//		dstImage := imaging.Overlay(backgroundImage, spriteImage, image.Pt(50, 50), 1.0)
+//
+//		// blend two opaque images of the same size
+//		dstImage := imaging.Overlay(imageOne, imageTwo, image.Pt(0, 0), 0.5)
+//
+func Overlay(background, img image.Image, pos image.Point, opacity float64) *image.NRGBA {
+	opacity = math.Min(math.Max(opacity, 0.0), 1.0) // check: 0.0 <= opacity <= 1.0
+
+	src := toNRGBA(img)
+	dst := Clone(background)                    // cloned image bounds start at (0, 0)
+	startPt := pos.Sub(background.Bounds().Min) // so we should translate start point
+	endPt := startPt.Add(src.Bounds().Size())
+	pasteBounds := image.Rectangle{startPt, endPt}
+
+	if dst.Bounds().Overlaps(pasteBounds) {
+		intersectBounds := dst.Bounds().Intersect(pasteBounds)
+
+		for y := intersectBounds.Min.Y; y < intersectBounds.Max.Y; y++ {
+			for x := intersectBounds.Min.X; x < intersectBounds.Max.X; x++ {
+				i := y*dst.Stride + x*4
+
+				srcX := x - pasteBounds.Min.X
+				srcY := y - pasteBounds.Min.Y
+				j := srcY*src.Stride + srcX*4
+
+				a1 := float64(dst.Pix[i+3])
+				a2 := float64(src.Pix[j+3])
+
+				coef2 := opacity * a2 / 255.0
+				coef1 := (1 - coef2) * a1 / 255.0
+				coefSum := coef1 + coef2
+				coef1 /= coefSum
+				coef2 /= coefSum
+
+				dst.Pix[i+0] = uint8(float64(dst.Pix[i+0])*coef1 + float64(src.Pix[j+0])*coef2)
+				dst.Pix[i+1] = uint8(float64(dst.Pix[i+1])*coef1 + float64(src.Pix[j+1])*coef2)
+				dst.Pix[i+2] = uint8(float64(dst.Pix[i+2])*coef1 + float64(src.Pix[j+2])*coef2)
+				dst.Pix[i+3] = uint8(math.Min(a1+a2*opacity*(255.0-a1)/255.0, 255.0))
+			}
+		}
+	}
+
+	return dst
+}

vendor/src/github.com/disintegration/imaging/tools_test.go

@@ -0,0 +1,250 @@
+package imaging
+
+import (
+	"image"
+	"testing"
+)
+
+func TestCrop(t *testing.T) {
+	td := []struct {
+		desc string
+		src  image.Image
+		r    image.Rectangle
+		want *image.NRGBA
+	}{
+		{
+			"Crop 2x3 2x1",
+			&image.NRGBA{
+				Rect:   image.Rect(-1, -1, 1, 2),
+				Stride: 2 * 4,
+				Pix: []uint8{
+					0x00, 0x11, 0x22, 0x33, 0xcc, 0xdd, 0xee, 0xff,
+					0xff, 0x00, 0x00, 0x00, 0x00, 0xff, 0x00, 0x00,
+					0x00, 0x00, 0xff, 0x00, 0x00, 0x00, 0x00, 0xff,
+				},
+			},
+			image.Rect(-1, 0, 1, 1),
+			&image.NRGBA{
+				Rect:   image.Rect(0, 0, 2, 1),
+				Stride: 2 * 4,
+				Pix: []uint8{
+					0xff, 0x00, 0x00, 0x00, 0x00, 0xff, 0x00, 0x00,
+				},
+			},
+		},
+	}
+	for _, d := range td {
+		got := Crop(d.src, d.r)
+		want := d.want
+		if !compareNRGBA(got, want, 0) {
+			t.Errorf("test [%s] failed: %#v", d.desc, got)
+		}
+	}
+}
+
+func TestCropCenter(t *testing.T) {
+	td := []struct {
+		desc string
+		src  image.Image
+		w, h int
+		want *image.NRGBA
+	}{
+		{
+			"CropCenter 2x3 2x1",
+			&image.NRGBA{
+				Rect:   image.Rect(-1, -1, 1, 2),
+				Stride: 2 * 4,
+				Pix: []uint8{
+					0x00, 0x11, 0x22, 0x33, 0xcc, 0xdd, 0xee, 0xff,
+					0xff, 0x00, 0x00, 0x00, 0x00, 0xff, 0x00, 0x00,
+					0x00, 0x00, 0xff, 0x00, 0x00, 0x00, 0x00, 0xff,
+				},
+			},
+			2, 1,
+			&image.NRGBA{
+				Rect:   image.Rect(0, 0, 2, 1),
+				Stride: 2 * 4,
+				Pix: []uint8{
+					0xff, 0x00, 0x00, 0x00, 0x00, 0xff, 0x00, 0x00,
+				},
+			},
+		},
+	}
+	for _, d := range td {
+		got := CropCenter(d.src, d.w, d.h)
+		want := d.want
+		if !compareNRGBA(got, want, 0) {
+			t.Errorf("test [%s] failed: %#v", d.desc, got)
+		}
+	}
+}
+
+func TestPaste(t *testing.T) {
+	td := []struct {
+		desc string
+		src1 image.Image
+		src2 image.Image
+		p    image.Point
+		want *image.NRGBA
+	}{
+		{
+			"Paste 2x3 2x1",
+			&image.NRGBA{
+				Rect:   image.Rect(-1, -1, 1, 2),
+				Stride: 2 * 4,
+				Pix: []uint8{
+					0x00, 0x11, 0x22, 0x33, 0xcc, 0xdd, 0xee, 0xff,
+					0xff, 0x00, 0x00, 0x00, 0x00, 0xff, 0x00, 0x00,
+					0x00, 0x00, 0xff, 0x00, 0x00, 0x00, 0x00, 0xff,
+				},
+			},
+			&image.NRGBA{
+				Rect:   image.Rect(1, 1, 3, 2),
+				Stride: 2 * 4,
+				Pix: []uint8{
+					0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08,
+				},
+			},
+			image.Pt(-1, 0),
+			&image.NRGBA{
+				Rect:   image.Rect(0, 0, 2, 3),
+				Stride: 2 * 4,
+				Pix: []uint8{
+					0x00, 0x11, 0x22, 0x33, 0xcc, 0xdd, 0xee, 0xff,
+					0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08,
+					0x00, 0x00, 0xff, 0x00, 0x00, 0x00, 0x00, 0xff,
+				},
+			},
+		},
+	}
+	for _, d := range td {
+		got := Paste(d.src1, d.src2, d.p)
+		want := d.want
+		if !compareNRGBA(got, want, 0) {
+			t.Errorf("test [%s] failed: %#v", d.desc, got)
+		}
+	}
+}
+
+func TestPasteCenter(t *testing.T) {
+	td := []struct {
+		desc string
+		src1 image.Image
+		src2 image.Image
+		want *image.NRGBA
+	}{
+		{
+			"PasteCenter 2x3 2x1",
+			&image.NRGBA{
+				Rect:   image.Rect(-1, -1, 1, 2),
+				Stride: 2 * 4,
+				Pix: []uint8{
+					0x00, 0x11, 0x22, 0x33, 0xcc, 0xdd, 0xee, 0xff,
+					0xff, 0x00, 0x00, 0x00, 0x00, 0xff, 0x00, 0x00,
+					0x00, 0x00, 0xff, 0x00, 0x00, 0x00, 0x00, 0xff,
+				},
+			},
+			&image.NRGBA{
+				Rect:   image.Rect(1, 1, 3, 2),
+				Stride: 2 * 4,
+				Pix: []uint8{
+					0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08,
+				},
+			},
+			&image.NRGBA{
+				Rect:   image.Rect(0, 0, 2, 3),
+				Stride: 2 * 4,
+				Pix: []uint8{
+					0x00, 0x11, 0x22, 0x33, 0xcc, 0xdd, 0xee, 0xff,
+					0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08,
+					0x00, 0x00, 0xff, 0x00, 0x00, 0x00, 0x00, 0xff,
+				},
+			},
+		},
+	}
+	for _, d := range td {
+		got := PasteCenter(d.src1, d.src2)
+		want := d.want
+		if !compareNRGBA(got, want, 0) {
+			t.Errorf("test [%s] failed: %#v", d.desc, got)
+		}
+	}
+}
+
+func TestOverlay(t *testing.T) {
+	td := []struct {
+		desc string
+		src1 image.Image
+		src2 image.Image
+		p    image.Point
+		a    float64
+		want *image.NRGBA
+	}{
+		{
+			"Overlay 2x3 2x1 1.0",
+			&image.NRGBA{
+				Rect:   image.Rect(-1, -1, 1, 2),
+				Stride: 2 * 4,
+				Pix: []uint8{
+					0x00, 0x11, 0x22, 0x33, 0xcc, 0xdd, 0xee, 0xff,
+					0x60, 0x00, 0x90, 0xff, 0xff, 0x00, 0x99, 0x7f,
+					0x00, 0x00, 0xff, 0x00, 0x00, 0x00, 0x00, 0xff,
+				},
+			},
+			&image.NRGBA{
+				Rect:   image.Rect(1, 1, 3, 2),
+				Stride: 2 * 4,
+				Pix: []uint8{
+					0x20, 0x40, 0x80, 0x7f, 0xaa, 0xbb, 0xcc, 0xff,
+				},
+			},
+			image.Pt(-1, 0),
+			1.0,
+			&image.NRGBA{
+				Rect:   image.Rect(0, 0, 2, 3),
+				Stride: 2 * 4,
+				Pix: []uint8{
+					0x00, 0x11, 0x22, 0x33, 0xcc, 0xdd, 0xee, 0xff,
+					0x40, 0x1f, 0x88, 0xff, 0xaa, 0xbb, 0xcc, 0xff,
+					0x00, 0x00, 0xff, 0x00, 0x00, 0x00, 0x00, 0xff,
+				},
+			},
+		},
+		{
+			"Overlay 2x2 2x2 0.5",
+			&image.NRGBA{
+				Rect:   image.Rect(-1, -1, 1, 1),
+				Stride: 2 * 4,
+				Pix: []uint8{
+					0xff, 0x00, 0x00, 0xff, 0x00, 0xff, 0x00, 0xff,
+					0x00, 0x00, 0xff, 0xff, 0x20, 0x20, 0x20, 0x00,
+				},
+			},
+			&image.NRGBA{
+				Rect:   image.Rect(-1, -1, 1, 1),
+				Stride: 2 * 4,
+				Pix: []uint8{
+					0xff, 0xff, 0xff, 0xff, 0x00, 0x00, 0x00, 0x00,
+					0xff, 0xff, 0x00, 0xff, 0x20, 0x20, 0x20, 0xff,
+				},
+			},
+			image.Pt(-1, -1),
+			0.5,
+			&image.NRGBA{
+				Rect:   image.Rect(0, 0, 2, 2),
+				Stride: 2 * 4,
+				Pix: []uint8{
+					0xff, 0x7f, 0x7f, 0xff, 0x00, 0xff, 0x00, 0xff,
+					0x7f, 0x7f, 0x7f, 0xff, 0x20, 0x20, 0x20, 0x7f,
+				},
+			},
+		},
+	}
+	for _, d := range td {
+		got := Overlay(d.src1, d.src2, d.p, d.a)
+		want := d.want
+		if !compareNRGBA(got, want, 1) {
+			t.Errorf("test [%s] failed: %#v", d.desc, got)
+		}
+	}
+}

vendor/src/github.com/disintegration/imaging/transform.go

@@ -0,0 +1,201 @@
+package imaging
+
+import (
+	"image"
+)
+
+// Rotate90 rotates the image 90 degrees counterclockwise and returns the transformed image.
+func Rotate90(img image.Image) *image.NRGBA {
+	src := toNRGBA(img)
+	srcW := src.Bounds().Max.X
+	srcH := src.Bounds().Max.Y
+	dstW := srcH
+	dstH := srcW
+	dst := image.NewNRGBA(image.Rect(0, 0, dstW, dstH))
+
+	parallel(dstH, func(partStart, partEnd int) {
+
+		for dstY := partStart; dstY < partEnd; dstY++ {
+			for dstX := 0; dstX < dstW; dstX++ {
+				srcX := dstH - dstY - 1
+				srcY := dstX
+
+				srcOff := srcY*src.Stride + srcX*4
+				dstOff := dstY*dst.Stride + dstX*4
+
+				copy(dst.Pix[dstOff:dstOff+4], src.Pix[srcOff:srcOff+4])
+			}
+		}
+
+	})
+
+	return dst
+}
+
+// Rotate180 rotates the image 180 degrees counterclockwise and returns the transformed image.
+func Rotate180(img image.Image) *image.NRGBA {
+	src := toNRGBA(img)
+	srcW := src.Bounds().Max.X
+	srcH := src.Bounds().Max.Y
+	dstW := srcW
+	dstH := srcH
+	dst := image.NewNRGBA(image.Rect(0, 0, dstW, dstH))
+
+	parallel(dstH, func(partStart, partEnd int) {
+
+		for dstY := partStart; dstY < partEnd; dstY++ {
+			for dstX := 0; dstX < dstW; dstX++ {
+				srcX := dstW - dstX - 1
+				srcY := dstH - dstY - 1
+
+				srcOff := srcY*src.Stride + srcX*4
+				dstOff := dstY*dst.Stride + dstX*4
+
+				copy(dst.Pix[dstOff:dstOff+4], src.Pix[srcOff:srcOff+4])
+			}
+		}
+
+	})
+
+	return dst
+}
+
+// Rotate270 rotates the image 270 degrees counterclockwise and returns the transformed image.
+func Rotate270(img image.Image) *image.NRGBA {
+	src := toNRGBA(img)
+	srcW := src.Bounds().Max.X
+	srcH := src.Bounds().Max.Y
+	dstW := srcH
+	dstH := srcW
+	dst := image.NewNRGBA(image.Rect(0, 0, dstW, dstH))
+
+	parallel(dstH, func(partStart, partEnd int) {
+
+		for dstY := partStart; dstY < partEnd; dstY++ {
+			for dstX := 0; dstX < dstW; dstX++ {
+				srcX := dstY
+				srcY := dstW - dstX - 1
+
+				srcOff := srcY*src.Stride + srcX*4
+				dstOff := dstY*dst.Stride + dstX*4
+
+				copy(dst.Pix[dstOff:dstOff+4], src.Pix[srcOff:srcOff+4])
+			}
+		}
+
+	})
+
+	return dst
+}
+
+// FlipH flips the image horizontally (from left to right) and returns the transformed image.
+func FlipH(img image.Image) *image.NRGBA {
+	src := toNRGBA(img)
+	srcW := src.Bounds().Max.X
+	srcH := src.Bounds().Max.Y
+	dstW := srcW
+	dstH := srcH
+	dst := image.NewNRGBA(image.Rect(0, 0, dstW, dstH))
+
+	parallel(dstH, func(partStart, partEnd int) {
+
+		for dstY := partStart; dstY < partEnd; dstY++ {
+			for dstX := 0; dstX < dstW; dstX++ {
+				srcX := dstW - dstX - 1
+				srcY := dstY
+
+				srcOff := srcY*src.Stride + srcX*4
+				dstOff := dstY*dst.Stride + dstX*4
+
+				copy(dst.Pix[dstOff:dstOff+4], src.Pix[srcOff:srcOff+4])
+			}
+		}
+
+	})
+
+	return dst
+}
+
+// FlipV flips the image vertically (from top to bottom) and returns the transformed image.
+func FlipV(img image.Image) *image.NRGBA {
+	src := toNRGBA(img)
+	srcW := src.Bounds().Max.X
+	srcH := src.Bounds().Max.Y
+	dstW := srcW
+	dstH := srcH
+	dst := image.NewNRGBA(image.Rect(0, 0, dstW, dstH))
+
+	parallel(dstH, func(partStart, partEnd int) {
+
+		for dstY := partStart; dstY < partEnd; dstY++ {
+			for dstX := 0; dstX < dstW; dstX++ {
+				srcX := dstX
+				srcY := dstH - dstY - 1
+
+				srcOff := srcY*src.Stride + srcX*4
+				dstOff := dstY*dst.Stride + dstX*4
+
+				copy(dst.Pix[dstOff:dstOff+4], src.Pix[srcOff:srcOff+4])
+			}
+		}
+
+	})
+
+	return dst
+}
+
+// Transpose flips the image horizontally and rotates 90 degrees counter-clockwise.
+func Transpose(img image.Image) *image.NRGBA {
+	src := toNRGBA(img)
+	srcW := src.Bounds().Max.X
+	srcH := src.Bounds().Max.Y
+	dstW := srcH
+	dstH := srcW
+	dst := image.NewNRGBA(image.Rect(0, 0, dstW, dstH))
+
+	parallel(dstH, func(partStart, partEnd int) {
+
+		for dstY := partStart; dstY < partEnd; dstY++ {
+			for dstX := 0; dstX < dstW; dstX++ {
+				srcX := dstY
+				srcY := dstX
+
+				srcOff := srcY*src.Stride + srcX*4
+				dstOff := dstY*dst.Stride + dstX*4
+
+				copy(dst.Pix[dstOff:dstOff+4], src.Pix[srcOff:srcOff+4])
+			}
+		}
+
+	})
+
+	return dst
+}
+
+// Transverse flips the image vertically and rotates 90 degrees counter-clockwise.
+func Transverse(img image.Image) *image.NRGBA {
+	src := toNRGBA(img)
+	srcW := src.Bounds().Max.X
+	srcH := src.Bounds().Max.Y
+	dstW := srcH
+	dstH := srcW
+	dst := image.NewNRGBA(image.Rect(0, 0, dstW, dstH))
+
+	parallel(dstH, func(partStart, partEnd int) {
+
+		for dstY := partStart; dstY < partEnd; dstY++ {
+			for dstX := 0; dstX < dstW; dstX++ {
+				srcX := dstH - dstY - 1
+				srcY := dstW - dstX - 1
+
+				srcOff := srcY*src.Stride + srcX*4
+				dstOff := dstY*dst.Stride + dstX*4
+
+				copy(dst.Pix[dstOff:dstOff+4], src.Pix[srcOff:srcOff+4])
+			}
+		}
+
+	})
+
+	return dst
+}

vendor/src/github.com/disintegration/imaging/transform_test.go

@@ -0,0 +1,261 @@
+package imaging
+
+import (
+	"image"
+	"testing"
+)
+
+func TestRotate90(t *testing.T) {
+	td := []struct {
+		desc string
+		src  image.Image
+		want *image.NRGBA
+	}{
+		{
+			"Rotate90 2x3",
+			&image.NRGBA{
+				Rect:   image.Rect(-1, -1, 1, 2),
+				Stride: 2 * 4,
+				Pix: []uint8{
+					0x00, 0x11, 0x22, 0x33, 0xcc, 0xdd, 0xee, 0xff,
+					0xff, 0x00, 0x00, 0x00, 0x00, 0xff, 0x00, 0x00,
+					0x00, 0x00, 0xff, 0x00, 0x00, 0x00, 0x00, 0xff,
+				},
+			},
+			&image.NRGBA{
+				Rect:   image.Rect(0, 0, 3, 2),
+				Stride: 3 * 4,
+				Pix: []uint8{
+					0xcc, 0xdd, 0xee, 0xff, 0x00, 0xff, 0x00, 0x00, 0x00, 0x00, 0x00, 0xff,
+					0x00, 0x11, 0x22, 0x33, 0xff, 0x00, 0x00, 0x00, 0x00, 0x00, 0xff, 0x00,
+				},
+			},
+		},
+	}
+	for _, d := range td {
+		got := Rotate90(d.src)
+		want := d.want
+		if !compareNRGBA(got, want, 0) {
+			t.Errorf("test [%s] failed: %#v", d.desc, got)
+		}
+	}
+}
+
+func TestRotate180(t *testing.T) {
+	td := []struct {
+		desc string
+		src  image.Image
+		want *image.NRGBA
+	}{
+		{
+			"Rotate180 2x3",
+			&image.NRGBA{
+				Rect:   image.Rect(-1, -1, 1, 2),
+				Stride: 2 * 4,
+				Pix: []uint8{
+					0x00, 0x11, 0x22, 0x33, 0xcc, 0xdd, 0xee, 0xff,
+					0xff, 0x00, 0x00, 0x00, 0x00, 0xff, 0x00, 0x00,
+					0x00, 0x00, 0xff, 0x00, 0x00, 0x00, 0x00, 0xff,
+				},
+			},
+			&image.NRGBA{
+				Rect:   image.Rect(0, 0, 2, 3),
+				Stride: 2 * 4,
+				Pix: []uint8{
+					0x00, 0x00, 0x00, 0xff, 0x00, 0x00, 0xff, 0x00,
+					0x00, 0xff, 0x00, 0x00, 0xff, 0x00, 0x00, 0x00,
+					0xcc, 0xdd, 0xee, 0xff, 0x00, 0x11, 0x22, 0x33,
+				},
+			},
+		},
+	}
+	for _, d := range td {
+		got := Rotate180(d.src)
+		want := d.want
+		if !compareNRGBA(got, want, 0) {
+			t.Errorf("test [%s] failed: %#v", d.desc, got)
+		}
+	}
+}
+
+func TestRotate270(t *testing.T) {
+	td := []struct {
+		desc string
+		src  image.Image
+		want *image.NRGBA
+	}{
+		{
+			"Rotate270 2x3",
+			&image.NRGBA{
+				Rect:   image.Rect(-1, -1, 1, 2),
+				Stride: 2 * 4,
+				Pix: []uint8{
+					0x00, 0x11, 0x22, 0x33, 0xcc, 0xdd, 0xee, 0xff,
+					0xff, 0x00, 0x00, 0x00, 0x00, 0xff, 0x00, 0x00,
+					0x00, 0x00, 0xff, 0x00, 0x00, 0x00, 0x00, 0xff,
+				},
+			},
+			&image.NRGBA{
+				Rect:   image.Rect(0, 0, 3, 2),
+				Stride: 3 * 4,
+				Pix: []uint8{
+					0x00, 0x00, 0xff, 0x00, 0xff, 0x00, 0x00, 0x00, 0x00, 0x11, 0x22, 0x33,
+					0x00, 0x00, 0x00, 0xff, 0x00, 0xff, 0x00, 0x00, 0xcc, 0xdd, 0xee, 0xff,
+				},
+			},
+		},
+	}
+	for _, d := range td {
+		got := Rotate270(d.src)
+		want := d.want
+		if !compareNRGBA(got, want, 0) {
+			t.Errorf("test [%s] failed: %#v", d.desc, got)
+		}
+	}
+}
+
+func TestFlipV(t *testing.T) {
+	td := []struct {
+		desc string
+		src  image.Image
+		want *image.NRGBA
+	}{
+		{
+			"FlipV 2x3",
+			&image.NRGBA{
+				Rect:   image.Rect(-1, -1, 1, 2),
+				Stride: 2 * 4,
+				Pix: []uint8{
+					0x00, 0x11, 0x22, 0x33, 0xcc, 0xdd, 0xee, 0xff,
+					0xff, 0x00, 0x00, 0x00, 0x00, 0xff, 0x00, 0x00,
+					0x00, 0x00, 0xff, 0x00, 0x00, 0x00, 0x00, 0xff,
+				},
+			},
+			&image.NRGBA{
+				Rect:   image.Rect(0, 0, 2, 3),
+				Stride: 2 * 4,
+				Pix: []uint8{
+					0x00, 0x00, 0xff, 0x00, 0x00, 0x00, 0x00, 0xff,
+					0xff, 0x00, 0x00, 0x00, 0x00, 0xff, 0x00, 0x00,
+					0x00, 0x11, 0x22, 0x33, 0xcc, 0xdd, 0xee, 0xff,
+				},
+			},
+		},
+	}
+	for _, d := range td {
+		got := FlipV(d.src)
+		want := d.want
+		if !compareNRGBA(got, want, 0) {
+			t.Errorf("test [%s] failed: %#v", d.desc, got)
+		}
+	}
+}
+
+func TestFlipH(t *testing.T) {
+	td := []struct {
+		desc string
+		src  image.Image
+		want *image.NRGBA
+	}{
+		{
+			"FlipH 2x3",
+			&image.NRGBA{
+				Rect:   image.Rect(-1, -1, 1, 2),
+				Stride: 2 * 4,
+				Pix: []uint8{
+					0x00, 0x11, 0x22, 0x33, 0xcc, 0xdd, 0xee, 0xff,
+					0xff, 0x00, 0x00, 0x00, 0x00, 0xff, 0x00, 0x00,
+					0x00, 0x00, 0xff, 0x00, 0x00, 0x00, 0x00, 0xff,
+				},
+			},
+			&image.NRGBA{
+				Rect:   image.Rect(0, 0, 2, 3),
+				Stride: 2 * 4,
+				Pix: []uint8{
+					0xcc, 0xdd, 0xee, 0xff, 0x00, 0x11, 0x22, 0x33,
+					0x00, 0xff, 0x00, 0x00, 0xff, 0x00, 0x00, 0x00,
+					0x00, 0x00, 0x00, 0xff, 0x00, 0x00, 0xff, 0x00,
+				},
+			},
+		},
+	}
+	for _, d := range td {
+		got := FlipH(d.src)
+		want := d.want
+		if !compareNRGBA(got, want, 0) {
+			t.Errorf("test [%s] failed: %#v", d.desc, got)
+		}
+	}
+}
+
+func TestTranspose(t *testing.T) {
+	td := []struct {
+		desc string
+		src  image.Image
+		want *image.NRGBA
+	}{
+		{
+			"Transpose 2x3",
+			&image.NRGBA{
+				Rect:   image.Rect(-1, -1, 1, 2),
+				Stride: 2 * 4,
+				Pix: []uint8{
+					0x00, 0x11, 0x22, 0x33, 0xcc, 0xdd, 0xee, 0xff,
+					0xff, 0x00, 0x00, 0x00, 0x00, 0xff, 0x00, 0x00,
+					0x00, 0x00, 0xff, 0x00, 0x00, 0x00, 0x00, 0xff,
+				},
+			},
+			&image.NRGBA{
+				Rect:   image.Rect(0, 0, 3, 2),
+				Stride: 3 * 4,
+				Pix: []uint8{
+					0x00, 0x11, 0x22, 0x33, 0xff, 0x00, 0x00, 0x00, 0x00, 0x00, 0xff, 0x00,
+					0xcc, 0xdd, 0xee, 0xff, 0x00, 0xff, 0x00, 0x00, 0x00, 0x00, 0x00, 0xff,
+				},
+			},
+		},
+	}
+	for _, d := range td {
+		got := Transpose(d.src)
+		want := d.want
+		if !compareNRGBA(got, want, 0) {
+			t.Errorf("test [%s] failed: %#v", d.desc, got)
+		}
+	}
+}
+
+func TestTransverse(t *testing.T) {
+	td := []struct {
+		desc string
+		src  image.Image
+		want *image.NRGBA
+	}{
+		{
+			"Transverse 2x3",
+			&image.NRGBA{
+				Rect:   image.Rect(-1, -1, 1, 2),
+				Stride: 2 * 4,
+				Pix: []uint8{
+					0x00, 0x11, 0x22, 0x33, 0xcc, 0xdd, 0xee, 0xff,
+					0xff, 0x00, 0x00, 0x00, 0x00, 0xff, 0x00, 0x00,
+					0x00, 0x00, 0xff, 0x00, 0x00, 0x00, 0x00, 0xff,
+				},
+			},
+			&image.NRGBA{
+				Rect:   image.Rect(0, 0, 3, 2),
+				Stride: 3 * 4,
+				Pix: []uint8{
+					0x00, 0x00, 0x00, 0xff, 0x00, 0xff, 0x00, 0x00, 0xcc, 0xdd, 0xee, 0xff,
+					0x00, 0x00, 0xff, 0x00, 0xff, 0x00, 0x00, 0x00, 0x00, 0x11, 0x22, 0x33,
+				},
+			},
+		},
+	}
+	for _, d := range td {
+		got := Transverse(d.src)
+		want := d.want
+		if !compareNRGBA(got, want, 0) {
+			t.Errorf("test [%s] failed: %#v", d.desc, got)
+		}
+	}
+}

vendor/src/github.com/disintegration/imaging/utils.go

@@ -0,0 +1,77 @@
+package imaging
+
+import (
+	"math"
+	"runtime"
+	"sync"
+	"sync/atomic"
+)
+
+var parallelizationEnabled = true
+
+// if GOMAXPROCS = 1: no goroutines used
+// if GOMAXPROCS > 1: spawn N=GOMAXPROCS workers in separate goroutines
+func parallel(dataSize int, fn func(partStart, partEnd int)) {
+	numGoroutines := 1
+	partSize := dataSize
+
+	if parallelizationEnabled {
+		numProcs := runtime.GOMAXPROCS(0)
+		if numProcs > 1 {
+			numGoroutines = numProcs
+			partSize = dataSize / (numGoroutines * 10)
+			if partSize < 1 {
+				partSize = 1
+			}
+		}
+	}
+
+	if numGoroutines == 1 {
+		fn(0, dataSize)
+	} else {
+		var wg sync.WaitGroup
+		wg.Add(numGoroutines)
+		idx := uint64(0)
+
+		for p := 0; p < numGoroutines; p++ {
+			go func() {
+				defer wg.Done()
+				for {
+					partStart := int(atomic.AddUint64(&idx, uint64(partSize))) - partSize
+					if partStart >= dataSize {
+						break
+					}
+					partEnd := partStart + partSize
+					if partEnd > dataSize {
+						partEnd = dataSize
+					}
+					fn(partStart, partEnd)
+				}
+			}()
+		}
+
+		wg.Wait()
+	}
+}
+
+func absint(i int) int {
+	if i < 0 {
+		return -i
+	}
+	return i
+}
+
+// clamp & round float64 to uint8 (0..255)
+func clamp(v float64) uint8 {
+	return uint8(math.Min(math.Max(v, 0.0), 255.0) + 0.5)
+}
+
+// clamp int32 to uint8 (0..255)
+func clampint32(v int32) uint8 {
+	if v < 0 {
+		return 0
+	} else if v > 255 {
+		return 255
+	}
+	return uint8(v)
+}

vendor/src/github.com/disintegration/imaging/utils_test.go

@@ -0,0 +1,61 @@
+package imaging
+
+import (
+	"runtime"
+	"testing"
+)
+
+func testParallelN(enabled bool, n, procs int) bool {
+	data := make([]bool, n)
+	before := runtime.GOMAXPROCS(0)
+	runtime.GOMAXPROCS(procs)
+	parallel(n, func(start, end int) {
+		for i := start; i < end; i++ {
+			data[i] = true
+		}
+	})
+	for i := 0; i < n; i++ {
+		if data[i] != true {
+			return false
+		}
+	}
+	runtime.GOMAXPROCS(before)
+	return true
+}
+
+func TestParallel(t *testing.T) {
+	for _, e := range []bool{true, false} {
+		for _, n := range []int{1, 10, 100, 1000} {
+			for _, p := range []int{1, 2, 4, 8, 16, 100} {
+				if testParallelN(e, n, p) != true {
+					t.Errorf("test [parallel %v %d %d] failed", e, n, p)
+				}
+			}
+		}
+	}
+}
+
+func TestClamp(t *testing.T) {
+	td := []struct {
+		f float64
+		u uint8
+	}{
+		{0, 0},
+		{255, 255},
+		{128, 128},
+		{0.49, 0},
+		{0.50, 1},
+		{254.9, 255},
+		{254.0, 254},
+		{256, 255},
+		{2500, 255},
+		{-10, 0},
+		{127.6, 128},
+	}
+
+	for _, d := range td {
+		if clamp(d.f) != d.u {
+			t.Errorf("test [clamp %v %v] failed: %v", d.f, d.u, clamp(d.f))
+		}
+	}
+}

vendor/src/github.com/drone/routes/LICENSE.txt

@@ -0,0 +1,19 @@
+Copyright (c) 2012 Brad Rydzewski
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.

vendor/src/github.com/drone/routes/README.md

@@ -0,0 +1,100 @@
+# routes.go
+a simple http routing API for the Go programming language
+
+    go get github.com/drone/routes
+
+for more information see:
+http://gopkgdoc.appspot.com/pkg/github.com/bradrydzewski/routes
+
+[![](https://drone.io/drone/routes/status.png)](https://drone.io/drone/routes/latest)
+
+## Getting Started
+
+    package main
+
+    import (
+        "fmt"
+        "github.com/drone/routes"
+        "net/http"
+    )
+
+    func Whoami(w http.ResponseWriter, r *http.Request) {
+        params := r.URL.Query()
+        lastName := params.Get(":last")
+        firstName := params.Get(":first")
+        fmt.Fprintf(w, "you are %s %s", firstName, lastName)
+    }
+
+    func main() {
+        mux := routes.New()
+        mux.Get("/:last/:first", Whoami)
+
+        http.Handle("/", mux)
+        http.ListenAndServe(":8088", nil)
+    }
+
+### Route Examples
+You can create routes for all http methods:
+
+    mux.Get("/:param", handler)
+    mux.Put("/:param", handler)
+    mux.Post("/:param", handler)
+    mux.Patch("/:param", handler)
+    mux.Del("/:param", handler)
+
+You can specify custom regular expressions for routes:
+
+    mux.Get("/files/:param(.+)", handler)
+
+You can also create routes for static files:
+
+    pwd, _ := os.Getwd()
+    mux.Static("/static", pwd)
+
+this will serve any files in `/static`, including files in subdirectories. For example `/static/logo.gif` or `/static/style/main.css`.
+
+## Filters / Middleware
+You can apply filters to routes, which is useful for enforcing security,
+redirects, etc.
+
+You can, for example, filter all request to enforce some type of security:
+
+    var FilterUser = func(w http.ResponseWriter, r *http.Request) {
+    	if r.URL.User == nil || r.URL.User.Username() != "admin" {
+    		http.Error(w, "", http.StatusUnauthorized)
+    	}
+    }
+
+    r.Filter(FilterUser)
+
+You can also apply filters only when certain REST URL Parameters exist:
+
+    r.Get("/:id", handler)
+    r.Filter("id", func(rw http.ResponseWriter, r *http.Request) {
+		...
+	})
+
+## Helper Functions
+You can use helper functions for serializing to Json and Xml. I found myself constantly writing code to serialize, set content type, content length, etc. Feel free to use these functions to eliminate redundant code in your app.
+
+Helper function for serving Json, sets content type to `application/json`:
+
+    func handler(w http.ResponseWriter, r *http.Request) {
+		mystruct := { ... }
+        routes.ServeJson(w, &mystruct)
+    }
+
+Helper function for serving Xml, sets content type to `application/xml`:
+
+    func handler(w http.ResponseWriter, r *http.Request) {
+		mystruct := { ... }
+        routes.ServeXml(w, &mystruct)
+    }
+
+Helper function to serve Xml OR Json, depending on the value of the `Accept` header:
+
+    func handler(w http.ResponseWriter, r *http.Request) {
+		mystruct := { ... }
+        routes.ServeFormatted(w, r, &mystruct)
+    }
+

vendor/src/github.com/drone/routes/bench/bench_test.go

@@ -0,0 +1,78 @@
+package bench
+
+import (
+	"fmt"
+	"net/http"
+	"net/http/httptest"
+	"testing"
+
+	"github.com/drone/routes"
+	gorilla "code.google.com/p/gorilla/mux"
+	"github.com/bmizerany/pat"
+)
+
+func HandlerOk(w http.ResponseWriter, r *http.Request) {
+	fmt.Fprintf(w, "hello world")
+	w.WriteHeader(http.StatusOK)
+}
+
+// Benchmark_Routes runs a benchmark against our custom Mux using the
+// default settings.
+func Benchmark_Routes(b *testing.B) {
+
+	handler := routes.New()
+	handler.Get("/person/:last/:first", HandlerOk)
+
+	for i := 0; i < b.N; i++ {
+		r, _ := http.NewRequest("GET", "/person/anderson/thomas?learn=kungfu", nil)
+		w := httptest.NewRecorder()
+		handler.ServeHTTP(w, r)
+	}
+
+}
+
+// Benchmark_Web runs a benchmark against the pat.go Mux using the
+// default settings.
+func Benchmark_Pat(b *testing.B) {
+
+
+
+	m := pat.New()
+	m.Get("/person/:last/:first", http.HandlerFunc(HandlerOk))
+
+	for i := 0; i < b.N; i++ {
+		r, _ := http.NewRequest("GET", "/person/anderson/thomas?learn=kungfu", nil)
+		w := httptest.NewRecorder()
+		m.ServeHTTP(w, r)
+	}
+}
+
+// Benchmark_Gorilla runs a benchmark against the Gorilla Mux using
+// the default settings.
+func Benchmark_GorillaHandler(b *testing.B) {
+
+
+	handler := gorilla.NewRouter()
+	handler.HandleFunc("/person/{last}/{first}", HandlerOk)
+
+	for i := 0; i < b.N; i++ {
+		r, _ := http.NewRequest("GET", "/person/anderson/thomas?learn=kungfu", nil)
+		w := httptest.NewRecorder()
+		handler.ServeHTTP(w, r)
+	}
+}
+
+// Benchmark_ServeMux runs a benchmark against the ServeMux Go function.
+// We use this to determine performance impact of our library, when compared
+// to the out-of-the-box Mux provided by Go.
+func Benchmark_ServeMux(b *testing.B) {
+
+	mux := http.NewServeMux()
+	mux.HandleFunc("/", HandlerOk)
+
+	for i := 0; i < b.N; i++ {
+		r, _ := http.NewRequest("GET", "/person/anderson/thomas?learn=kungfu", nil)
+		w := httptest.NewRecorder()
+		mux.ServeHTTP(w, r)
+	}
+}

vendor/src/github.com/drone/routes/doc.go

@@ -0,0 +1,38 @@
+/*
+Package routes a simple http routing API for the Go programming language,
+compatible with the standard http.ListenAndServe function.
+
+Create a new route multiplexer:
+
+	mux := routes.New()
+
+Define a simple route with a given method (ie Get, Put, Post ...), path and
+http.HandleFunc.
+
+	mux.Get("/foo", fooHandler)
+
+Define a route with restful parameters in the path:
+
+	mux.Get("/:foo/:bar", func(w http.ResponseWriter, r *http.Request) {
+		params := r.URL.Query()
+		foo := params.Get(":foo")
+		bar := params.Get(":bar")
+		fmt.Fprintf(w, "%s %s", foo, bar)
+	})
+
+The parameters are parsed from the URL, and appended to the Request URL's
+query parameters.
+
+More control over the route's parameter matching is possible by providing
+a custom regular expression:
+
+	mux.Get("/files/:file(.+)", handler)
+
+To start the web server, use the standard http.ListenAndServe
+function, and provide the route multiplexer:
+
+    http.Handle("/", mux)
+    http.ListenAndServe(":8000", nil)
+
+*/
+package routes

vendor/src/github.com/drone/routes/exp/README.md

@@ -0,0 +1,107 @@
+# routes.go
+a simple http routing API for the Go programming language
+
+    go get github.com/drone/routes
+
+for more information see:
+http://gopkgdoc.appspot.com/pkg/github.com/drone/routes
+
+[![](https://drone.io/drone/routes/status.png)](https://drone.io/drone/routes/latest)
+
+## Getting Started
+
+    package main
+
+    import (
+        "fmt"
+        "github.com/drone/routes"
+        "net/http"
+    )
+
+    func foobar (w http.ResponseWriter, r *http.Request) {
+		c := routes.NewContext(r)
+		foo := c.Params.Get(":foo")
+		bar := c.Params.Get(":bar")
+		fmt.Fprintf(w, "%s %s", foo, bar)
+    }
+
+    func main() {
+        r := routes.NewRouter()
+        r.Get("/:bar/:foo", foobar)
+
+        http.Handle("/", r)
+        http.ListenAndServe(":8088", nil)
+    }
+
+### Route Examples
+You can create routes for all http methods:
+
+    r.Get("/:param", handler)
+    r.Put("/:param", handler)
+    r.Post("/:param", handler)
+    r.Patch("/:param", handler)
+    r.Del("/:param", handler)
+
+You can specify custom regular expressions for routes:
+
+    r.Get("/files/:param(.+)", handler)
+
+You can also create routes for static files:
+
+    pwd, _ := os.Getwd()
+    r.Static("/static", pwd)
+
+this will serve any files in `/static`, including files in subdirectories. For
+example `/static/logo.gif` or `/static/style/main.css`.
+
+## Filters / Middleware
+You can implement route filters to do things like enforce security, set session
+variables, etc
+
+You can, for example, filter all request to enforce some type of security:
+
+    r.Filter(func(rw http.ResponseWriter, r *http.Request) {
+    	if r.URL.User != "admin" {
+    		http.Error(w, "", http.StatusForbidden)
+    	}
+	})
+
+You can also apply filters only when certain REST URL Parameters exist:
+
+    r.Get("/:id", handler)
+    r.Filter("id", func(rw http.ResponseWriter, r *http.Request) {
+		c := routes.NewContext(r)
+		id := c.Params.Get("id")
+
+		// verify the user has access to the specified resource id
+    	user := r.URL.User.Username()
+	    if HasAccess(user, id) == false {
+			http.Error(w, "", http.StatusForbidden)
+		}
+	})
+
+## Helper Functions
+You can use helper functions for serializing to Json and Xml. I found myself
+constantly writing code to serialize, set content type, content length, etc.
+Feel free to use these functions to eliminate redundant code in your app.
+
+Helper function for serving Json, sets content type to `application/json`:
+
+    func handler(w http.ResponseWriter, r *http.Request) {
+		mystruct := { ... }
+        routes.ServeJson(w, &mystruct)
+    }
+
+Helper function for serving Xml, sets content type to `application/xml`:
+
+    func handler(w http.ResponseWriter, r *http.Request) {
+		mystruct := { ... }
+        routes.ServeXml(w, &mystruct)
+    }
+
+Helper function to serve Xml OR Json, depending on the value of the `Accept` header:
+
+    func handler(w http.ResponseWriter, r *http.Request) {
+		mystruct := { ... }
+        routes.ServeFormatted(w, r, &mystruct)
+    }

vendor/src/github.com/drone/routes/exp/context/context.go

@@ -0,0 +1,132 @@
+package context
+
+import (
+	"io"
+	"net/http"
+)
+
+// Context stores data for the duration of the http.Request
+type Context struct {
+	// named parameters that are passed in via RESTful URL Parameters
+	Params Params
+
+	// named attributes that persist for the lifetime of the request
+	Values Values
+
+	// reference to the parent http.Request
+	req *http.Request
+}
+
+// Retruns the Context associated with the http.Request.
+func Get(r *http.Request) *Context {
+
+	// get the context bound to the http.Request
+	if v, ok := r.Body.(*wrapper); ok {
+		return v.context
+	}
+
+	// create a new context
+	c := Context{ }
+	c.Params = make(Params)
+	c.Values = make(Values)
+	c.req = r
+
+	// wrap the request and bind the context
+	wrapper := wrap(r)
+	wrapper.context = &c
+	return &c
+}
+
+// Retruns the parent http.Request to which the context is bound.
+func (c *Context) Request() *http.Request {
+	return c.req
+}
+
+// wrapper decorates an http.Request's Body (io.ReadCloser) so that we can
+// bind a Context to the Request. This is obviously a hack that i'd rather
+// avoid, however, it is for the greater good ...
+//
+// NOTE: If this turns out to be a really stupid approach we can use this
+//       approach from the go mailing list: http://goo.gl/Vw13f which I
+//       avoided because I didn't want a global lock
+type wrapper struct {
+	body    io.ReadCloser // the original message body
+	context *Context
+}
+
+func wrap(r *http.Request) *wrapper {
+	w := wrapper{ body: r.Body }
+	r.Body = &w
+	return &w
+}
+
+func (w *wrapper) Read(p []byte) (n int, err error) {
+	return w.body.Read(p)
+}
+
+func (w *wrapper) Close() error {
+	return w.body.Close()
+}
+
+// Parameter Map ---------------------------------------------------------------
+
+// Params maps a string key to a list of values.
+type Params map[string]string
+
+// Get gets the first value associated with the given key. If there are
+// no values associated with the key, Get returns the empty string.
+func (p Params) Get(key string) string {
+	if p == nil {
+		return ""
+	}
+	return p[key]
+}
+
+// Set sets the key to value. It replaces any existing values.
+func (p Params) Set(key, value string) {
+	p[key] = value
+}
+
+// Del deletes the values associated with key.
+func (p Params) Del(key string) {
+	delete(p, key)
+}
+
+// Value Map -------------------------------------------------------------------
+
+// Values maps a string key to a list of values.
+type Values map[interface{}]interface{}
+
+// Get gets the value associated with the given key. If there are
+// no values associated with the key, Get returns nil.
+func (v Values) Get(key interface{}) interface{} {
+	if v == nil {
+		return nil
+	}
+
+	return v[key]
+}
+
+// GetStr gets the value associated with the given key in string format.
+// If there are no values associated with the key, Get returns an
+// empty string.
+func (v Values) GetStr(key interface{}) interface{} {
+	if v == nil { return "" }
+	
+	val := v.Get(key)
+	if val == nil { return "" }
+
+	str, ok := val.(string)
+	if !ok { return "" }
+	return str
+}
+
+// Set sets the key to value. It replaces any existing values.
+func (v Values) Set(key, value interface{}) {
+	v[key] = value
+}
+
+// Del deletes the values associated with key.
+func (v Values) Del(key interface{}) {
+	delete(v, key)
+}

vendor/src/github.com/drone/routes/exp/cookie/authcookie/LICENSE

@@ -0,0 +1,19 @@
+Copyright (c) 2011 Dmitry Chestnykh
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.

vendor/src/github.com/drone/routes/exp/cookie/authcookie/README.md

@@ -0,0 +1,99 @@
+Package authcookie
+=====================
+
+	import "github.com/dchest/authcookie"
+
+Package authcookie implements creation and verification of signed
+authentication cookies.
+
+Cookie is a Base64 encoded (using URLEncoding, from RFC 4648) string, which
+consists of concatenation of expiration time, login, and signature:
+
+	expiration time || login || signature
+
+where expiration time is the number of seconds since Unix epoch UTC
+indicating when this cookie must expire (4 bytes, big-endian, uint32), login
+is a byte string of arbitrary length (at least 1 byte, not null-terminated),
+and signature is 32 bytes of HMAC-SHA256(expiration_time || login, k), where
+k = HMAC-SHA256(expiration_time || login, secret key).
+
+Example:
+
+	secret := []byte("my secret key")
+
+	// Generate cookie valid for 24 hours for user "bender"
+	cookie := authcookie.NewSinceNow("bender", 24 * time.Hour, secret)
+
+	// cookie is now:
+	// Tajh02JlbmRlcskYMxowgwPj5QZ94jaxhDoh3n0Yp4hgGtUpeO0YbMTY
+	// send it to user's browser..
+
+	// To authenticate a user later, receive cookie and:
+	login := authcookie.Login(cookie, secret)
+	if login != "" {
+		// access for login granted
+	} else {
+		// access denied
+	}
+
+Note that login and expiration time are not encrypted, they are only signed
+and Base64 encoded.
+
+
+Variables
+---------
+
+	var (
+	    ErrMalformedCookie = errors.New("malformed cookie")
+	    ErrWrongSignature  = errors.New("wrong cookie signature")
+	)
+
+
+	var MinLength = base64.URLEncoding.EncodedLen(decodedMinLength)
+
+MinLength is the minimum allowed length of cookie string.
+
+It is useful for avoiding DoS attacks with too long cookies: before passing
+a cookie to Parse or Login functions, check that it has length less than the
+[maximum login length allowed in your application] + MinLength.
+
+
+Functions
+---------
+
+### func Login
+
+	func Login(cookie string, secret []byte) string
+	
+Login returns a valid login extracted from the given cookie and verified
+using the given secret key.  If verification fails or the cookie expired,
+the function returns an empty string.
+
+### func New
+
+	func New(login string, expires time.Time, secret []byte) string
+	
+New returns a signed authentication cookie for the given login,
+expiration time, and secret key.
+If the login is empty, the function returns an empty string.
+
+### func NewSinceNow
+
+	func NewSinceNow(login string, dur time.Duration, secret []byte) string
+	
+NewSinceNow returns a signed authetication cookie for the given login,
+duration time since current time, and secret key.
+
+### func Parse
+
+	func Parse(cookie string, secret []byte) (login string, expires time.Time, err error)
+	
+Parse verifies the given cookie with the secret key and returns login and
+expiration time extracted from the cookie. If the cookie fails verification
+or is not well-formed, the function returns an error.
+
+Callers must:
+
+1. Check for the returned error and deny access if it's present.
+
+2. Check the returned expiration time and deny access if it's in the past.

vendor/src/github.com/drone/routes/exp/cookie/authcookie/authcookie.go

@@ -0,0 +1,154 @@
+// Package authcookie implements creation and verification of signed
+// authentication cookies.
+//
+// Cookie is a Base64 encoded (using URLEncoding, from RFC 4648) string, which
+// consists of concatenation of expiration time, login, and signature:
+//
+// 	expiration time || login || signature
+//
+// where expiration time is the number of seconds since Unix epoch UTC
+// indicating when this cookie must expire (4 bytes, big-endian, uint32), login
+// is a byte string of arbitrary length (at least 1 byte, not null-terminated),
+// and signature is 32 bytes of HMAC-SHA256(expiration_time || login, k), where
+// k = HMAC-SHA256(expiration_time || login, secret key).
+//
+// Example:
+//
+//	secret := []byte("my secret key")
+//
+//	// Generate cookie valid for 24 hours for user "bender"
+//	cookie := authcookie.NewSinceNow("bender", 24 * time.Hour, secret)
+//
+//	// cookie is now:
+//	// Tajh02JlbmRlcskYMxowgwPj5QZ94jaxhDoh3n0Yp4hgGtUpeO0YbMTY
+//	// send it to user's browser..
+//	
+//	// To authenticate a user later, receive cookie and:
+//	login := authcookie.Login(cookie, secret)
+//	if login != "" {
+//		// access for login granted
+//	} else {
+//		// access denied
+//	}
+//
+// Note that login and expiration time are not encrypted, they are only signed
+// and Base64 encoded.
+//
+// For safety, the maximum length of base64-decoded cookie is limited to 1024
+// bytes.
+package authcookie
+
+import (
+	"crypto/hmac"
+	"crypto/sha256"
+	"crypto/subtle"
+	"encoding/base64"
+	"encoding/binary"
+	"errors"
+	"time"
+)
+
+const (
+	decodedMinLength = 4 /*expiration*/ + 1 /*login*/ + 32 /*signature*/
+	decodedMaxLength = 1024                                /* maximum decoded length, for safety */
+)
+
+// MinLength is the minimum allowed length of cookie string.
+//
+// It is useful for avoiding DoS attacks with too long cookies: before passing
+// a cookie to Parse or Login functions, check that it has length less than the
+// [maximum login length allowed in your application] + MinLength.
+var MinLength = base64.URLEncoding.EncodedLen(decodedMinLength)
+
+func getSignature(b []byte, secret []byte) []byte {
+	keym := hmac.New(sha256.New, secret)
+	keym.Write(b)
+	m := hmac.New(sha256.New, keym.Sum(nil))
+	m.Write(b)
+	return m.Sum(nil)
+}
+
+var (
+	ErrMalformedCookie = errors.New("malformed cookie")
+	ErrWrongSignature  = errors.New("wrong cookie signature")
+)
+
+// New returns a signed authentication cookie for the given login,
+// expiration time, and secret key.
+// If the login is empty, the function returns an empty string.
+func New(login string, expires time.Time, secret []byte) string {
+	if login == "" {
+		return ""
+	}
+	llen := len(login)
+	b := make([]byte, llen+4+32)
+	// Put expiration time.
+	binary.BigEndian.PutUint32(b, uint32(expires.Unix()))
+	// Put login.
+	copy(b[4:], []byte(login))
+	// Calculate and put signature.
+	sig := getSignature([]byte(b[:4+llen]), secret)
+	copy(b[4+llen:], sig)
+	// Base64-encode.
+	return base64.URLEncoding.EncodeToString(b)
+}
+
+// NewSinceNow returns a signed authetication cookie for the given login,
+// duration since current time, and secret key.
+func NewSinceNow(login string, dur time.Duration, secret []byte) string {
+	return New(login, time.Now().Add(dur), secret)
+}
+
+// Parse verifies the given cookie with the secret key and returns login and
+// expiration time extracted from the cookie. If the cookie fails verification
+// or is not well-formed, the function returns an error.
+//
+// Callers must: 
+//
+// 1. Check for the returned error and deny access if it's present.
+//
+// 2. Check the returned expiration time and deny access if it's in the past.
+//
+func Parse(cookie string, secret []byte) (login string, expires time.Time, err error) {
+	blen := base64.URLEncoding.DecodedLen(len(cookie))
+	// Avoid allocation if cookie is too short or too long.
+	if blen < decodedMinLength || blen > decodedMaxLength {
+		err = ErrMalformedCookie
+		return
+	}
+	b, err := base64.URLEncoding.DecodeString(cookie)
+	if err != nil {
+		return
+	}
+	// Decoded length may be different from max length, which
+	// we allocated, so check it, and set new length for b.
+	blen = len(b)
+	if blen < decodedMinLength {
+		err = ErrMalformedCookie
+		return
+	}
+	b = b[:blen]
+
+	sig := b[blen-32:]
+	data := b[:blen-32]
+
+	realSig := getSignature(data, secret)
+	if subtle.ConstantTimeCompare(realSig, sig) != 1 {
+		err = ErrWrongSignature
+		return
+	}
+	expires = time.Unix(int64(binary.BigEndian.Uint32(data[:4])), 0)
+	login = string(data[4:])
+	return
+}
+
+// Login returns a valid login extracted from the given cookie and verified
+// using the given secret key.  If verification fails or the cookie expired,
+// the function returns an empty string.
+func Login(cookie string, secret []byte) string {
+	l, exp, err := Parse(cookie, secret)
+	if err != nil || exp.Before(time.Now()) {
+		return ""
+	}
+	return l
+}

vendor/src/github.com/drone/routes/exp/cookie/authcookie/authcookie_test.go

@@ -0,0 +1,78 @@
+package authcookie
+
+import (
+	"testing"
+	"time"
+)
+
+func TestNew(t *testing.T) {
+	secret := []byte("secret key")
+	good := "AAAAKmhlbGxvIHdvcmxk9p6koQvSacAeliAm445i7errSk1NPkYJGYZhF93wG9U="
+	c := New("hello world", time.Unix(42, 0), secret)
+	if c != good {
+		t.Errorf("expected %q, got %q", good, c)
+	}
+	// Test empty login
+	c = New("", time.Unix(42, 0), secret)
+	if c != "" {
+		t.Errorf(`allowed empty login: got %q, expected ""`, c)
+	}
+}
+
+func TestParse(t *testing.T) {
+	// good
+	sec := time.Now()
+	login := "bender"
+	key := []byte("another secret key")
+	c := New(login, sec, key)
+	l, e, err := Parse(c, key)
+	if err != nil {
+		t.Errorf("error parsing valid cookie: %s", err)
+	}
+	if l != login {
+		t.Errorf("login: expected %q, got %q", login, l)
+	}
+	// NOTE: nanos are discarded internally since only 4 bytes of timestamp are used
+	//          so we can only compare seconds here
+	if e.Unix() != sec.Unix() {
+		t.Errorf("expiration: expected %v, got %v", sec, e)
+	}
+	// bad
+	key = []byte("secret key")
+	bad := []string{
+		"",
+		"AAAAKvgQ2I_RGePVk9oAu55q-Valnf__Fx_hlTM-dLwYxXOf",
+		"badcookie",
+		"AAAAAKmhlbGxvIHdvcmxk9p6koQvSacAeliAm445i7errSk1NPkYJGYZhF93wG9U=",
+		"zAAAKmhlbGxvIHdvcmxk9p6koQvSacAeliAm445i7errSk1NPkYJGYZhF93wG9U=",
+		"AAAAAKmhlbGxvIHdvcmxk9p6kiQvSacAeliAm445i7errSk1NPkYJGYZhF93wG9U=",
+	}
+	for _, v := range bad {
+		_, _, err := Parse(v, key)
+		if err == nil {
+			t.Errorf("bad cookie didn't return error: %q", v)
+		}
+	}
+}
+
+func TestLogin(t *testing.T) {
+	login := "~~~!|zoidberg|!~~~"
+	key := []byte("(:€")
+	exp := time.Now().Add(time.Second * 120)
+	c := New(login, exp, key)
+	l := Login(c, key)
+	if l != login {
+		t.Errorf("login: expected %q, got %q", login, l)
+	}
+	c = "no" + c
+	l = Login(c, key)
+	if l != "" {
+		t.Errorf("login expected empty string, got %q", l)
+	}
+	exp = time.Now().Add(-(time.Second * 30))
+	c = New(login, exp, key)
+	l = Login(c, key)
+	if l != "" {
+		t.Errorf("returned login from expired cookie")
+	}
+}

vendor/src/github.com/drone/routes/exp/cookie/cookie.go

@@ -0,0 +1,53 @@
+package cookie
+
+import (
+	"net/http"
+	"time"
+
+	"github.com/drone/routes/exp/cookie/authcookie"
+)
+
+// Sign signs and timestamps a cookie so it cannot be forged.
+func Sign(cookie *http.Cookie, secret string, expires time.Time) {
+	val := SignStr(cookie.Value, secret, expires)
+	cookie.Value = val
+}
+
+// SignStr signs and timestamps a string so it cannot be forged.
+// 
+// Normally used via Sign, but provided as a separate method for
+// non-cookie uses. To decode a value not stored as a cookie use the
+// DecodeStr function.
+func SignStr(value, secret string, expires time.Time) string {
+	return authcookie.New(value, expires, []byte(secret))
+}
+
+// DecodeStr returns the given signed cookie value if it validates,
+// else returns an empty string.
+func Decode(cookie *http.Cookie, secret string) string {
+	return DecodeStr(cookie.Value, secret)
+}
+
+// DecodeStr returns the given signed value if it validates,
+// else returns an empty string.
+func DecodeStr(value, secret string) string {
+	return authcookie.Login(value, []byte(secret))
+}
+
+// Clear deletes the cookie with the given name.
+func Clear(w http.ResponseWriter, r *http.Request, name string) {
+	cookie := http.Cookie{
+		Name:   name,
+		Value:  "deleted",
+		Path:   "/",
+		Domain: r.URL.Host,
+		MaxAge: -1,
+	}
+
+	http.SetCookie(w, &cookie)
+}
+
+
+
+
+

vendor/src/github.com/drone/routes/exp/router/routes.go

@@ -0,0 +1,241 @@
+package router
+
+import (
+	"bufio"
+	"net"
+	"net/http"
+	"path/filepath"
+	"regexp"
+	"strings"
+	"sync"
+
+	"github.com/drone/routes/exp/context"
+)
+
+const (
+	DELETE  = "DELETE"
+	GET     = "GET"
+	HEAD    = "HEAD"
+	OPTIONS = "OPTIONS"
+	PATCH   = "PATCH"
+	POST    = "POST"
+	PUT     = "PUT"
+)
+
+type route struct {
+	method  string
+	regex   *regexp.Regexp
+	params  map[int]string
+	handler http.HandlerFunc
+}
+
+type Router struct {
+	sync.RWMutex
+	routes  []*route
+	filters []http.HandlerFunc
+	params  map[string]interface{}
+}
+
+func New() *Router {
+	r := Router{}
+	r.params = make(map[string]interface{})
+	return &r
+}
+
+// Get adds a new Route for GET requests.
+func (r *Router) Get(pattern string, handler http.HandlerFunc) {
+	r.AddRoute(GET, pattern, handler)
+}
+
+// Put adds a new Route for PUT requests.
+func (r *Router) Put(pattern string, handler http.HandlerFunc) {
+	r.AddRoute(PUT, pattern, handler)
+}
+
+// Del adds a new Route for DELETE requests.
+func (r *Router) Del(pattern string, handler http.HandlerFunc) {
+	r.AddRoute(DELETE, pattern, handler)
+}
+
+// Patch adds a new Route for PATCH requests.
+func (r *Router) Patch(pattern string, handler http.HandlerFunc) {
+	r.AddRoute(PATCH, pattern, handler)
+}
+
+// Post adds a new Route for POST requests.
+func (r *Router) Post(pattern string, handler http.HandlerFunc) {
+	r.AddRoute(POST, pattern, handler)
+}
+
+// Adds a new Route for Static http requests. Serves
+// static files from the specified directory
+func (r *Router) Static(pattern string, dir string) {
+	//append a regex to the param to match everything
+	// that comes after the prefix
+	pattern = pattern + "(.+)"
+	r.Get(pattern, func(w http.ResponseWriter, req *http.Request) {
+		path := filepath.Clean(req.URL.Path)
+		path = filepath.Join(dir, path)
+		http.ServeFile(w, req, path)
+	})
+}
+
+// Adds a new Route to the Handler
+func (r *Router) AddRoute(method string, pattern string, handler http.HandlerFunc) {
+	r.Lock()
+	defer r.Unlock()
+
+	//split the url into sections
+	parts := strings.Split(pattern, "/")
+
+	//find params that start with ":"
+	//replace with regular expressions
+	j := 0
+	params := make(map[int]string)
+	for i, part := range parts {
+		if strings.HasPrefix(part, ":") {
+			expr := "([^/]+)"
+			//a user may choose to override the defult expression
+			// similar to expressjs: ‘/user/:id([0-9]+)’ 
+			if index := strings.Index(part, "("); index != -1 {
+				expr = part[index:]
+				part = part[:index]
+			}
+			params[j] = part[1:]
+			parts[i] = expr
+			j++
+		}
+	}
+
+	//recreate the url pattern, with parameters replaced
+	//by regular expressions. then compile the regex
+	pattern = strings.Join(parts, "/")
+	regex := regexp.MustCompile(pattern)
+
+	route := &route{
+		method  : method,
+		regex   : regex,
+		handler : handler,
+		params  : params,
+	}
+
+	//append to the list of Routes
+	r.routes = append(r.routes, route)
+}
+
+// Filter adds the middleware filter.
+func (r *Router) Filter(filter http.HandlerFunc) {
+	r.Lock()
+	r.filters = append(r.filters, filter)
+	r.Unlock()
+}
+
+// FilterParam adds the middleware filter iff the URL parameter exists.
+func (r *Router) FilterParam(param string, filter http.HandlerFunc) {
+	r.Filter(func(w http.ResponseWriter, req *http.Request) {
+		c := context.Get(req)
+		if len(c.Params.Get(param)) > 0 { filter(w, req) }
+	})
+}
+
+// FilterPath adds the middleware filter iff the path matches the request.
+func (r *Router) FilterPath(path string, filter http.HandlerFunc) {
+	pattern := path
+	pattern = strings.Replace(pattern, "*", "(.+)", -1)
+	pattern = strings.Replace(pattern, "**", "([^/]+)", -1)
+	regex := regexp.MustCompile(pattern)
+	r.Filter(func(w http.ResponseWriter, req *http.Request) {
+		if regex.MatchString(req.URL.Path) { filter(w, req) }
+	})
+}
+
+// Required by http.Handler interface. This method is invoked by the
+// http server and will handle all page routing
+func (r *Router) ServeHTTP(rw http.ResponseWriter, req *http.Request) {
+	r.RLock()
+	defer r.RUnlock()
+
+	//wrap the response writer in our custom interface
+	w := &responseWriter{writer: rw, Router: r}
+
+	//find a matching Route
+	for _, route := range r.routes {
+
+		//if the methods don't match, skip this handler
+		//i.e if request.Method is 'PUT' Route.Method must be 'PUT'
+		if req.Method != route.method {
+			continue
+		}
+
+		//check if Route pattern matches url
+		if !route.regex.MatchString(req.URL.Path) {
+			continue
+		}
+
+		//get submatches (params)
+		matches := route.regex.FindStringSubmatch(req.URL.Path)
+
+		//double check that the Route matches the URL pattern.
+		if len(matches[0]) != len(req.URL.Path) {
+			continue
+		}
+
+		//create the http.Requests context
+		c := context.Get(req)
+
+		//add url parameters to the context
+		for i, match := range matches[1:] {
+			c.Params.Set(route.params[i], match)
+		}
+
+		//execute middleware filters
+		for _, filter := range r.filters {
+			filter(w, req)
+			if w.started { return }
+		}
+
+		//invoke the request handler
+		route.handler(w, req)
+		return
+	}
+
+	//if no matches to url, throw a not found exception
+	if w.started == false {
+		http.NotFound(w, req)
+	}
+}
+
+// responseWriter is a wrapper for the http.ResponseWriter to track if
+// response was written to, and to store a reference to the router.
+type responseWriter struct {
+	Router  *Router
+	writer  http.ResponseWriter
+	started bool
+	status  int
+}
+
+// Header returns the header map that will be sent by WriteHeader.
+func (w *responseWriter) Header() http.Header {
+	return w.writer.Header()
+}
+
+// Write writes the data to the connection as part of an HTTP reply,
+// and sets `started` to true
+func (w *responseWriter) Write(p []byte) (int, error) {
+	w.started = true
+	return w.writer.Write(p)
+}
+
+// WriteHeader sends an HTTP response header with status code,
+// and sets `started` to true
+func (w *responseWriter) WriteHeader(code int) {
+	w.status = code
+	w.started = true
+	w.writer.WriteHeader(code)
+}
+
+// The Hijacker interface is implemented by ResponseWriters that allow an
+// HTTP handler to take over the connection.
+func (w *responseWriter) Hijack() (net.Conn, *bufio.ReadWriter, error) {
+	return w.writer.(http.Hijacker).Hijack()
+}

vendor/src/github.com/drone/routes/exp/router/routes_test.go

@@ -0,0 +1,227 @@
+package router
+
+import (
+	"fmt"
+	"net/http"
+	"net/http/httptest"
+	"testing"
+	"github.com/drone/routes/exp/context"
+)
+
+func HandlerOk(w http.ResponseWriter, r *http.Request) {
+	fmt.Fprintf(w, "hello world")
+	w.WriteHeader(http.StatusOK)
+}
+
+func HandlerSetVar(w http.ResponseWriter, r *http.Request) {
+	c := context.Get(r)
+	c.Values.Set("password", "z1on")
+}
+
+func HandlerErr(w http.ResponseWriter, r *http.Request) {
+	http.Error(w, "", http.StatusBadRequest)
+}
+
+// TestRouteOk tests that the route is correctly handled, and the URL parameters
+// are added to the Context.
+func TestRouteOk(t *testing.T) {
+
+	r, _ := http.NewRequest("GET", "/person/anderson/thomas?learn=kungfu", nil)
+	w := httptest.NewRecorder()
+
+	mux := New()
+	mux.Get("/person/:last/:first", HandlerOk)
+	mux.ServeHTTP(w, r)
+
+	c := context.Get(r)
+	lastNameParam := c.Params.Get("last")
+	firstNameParam := c.Params.Get("first")
+
+	if lastNameParam != "anderson" {
+		t.Errorf("url param set to [%s]; want [%s]", lastNameParam, "anderson")
+	}
+	if firstNameParam != "thomas" {
+		t.Errorf("url param set to [%s]; want [%s]", firstNameParam, "thomas")
+	}
+	if w.Body.String() != "hello world" {
+		t.Errorf("Body set to [%s]; want [%s]", w.Body.String(), "hello world")
+	}
+}
+
+// TestFilter tests that a route is filtered prior to handling
+func TestRouteFilter(t *testing.T) {
+
+	r, _ := http.NewRequest("GET", "/person/anderson/thomas?learn=kungfu", nil)
+	w := httptest.NewRecorder()
+
+	mux := New()
+	mux.Filter(HandlerSetVar)
+	mux.Get("/person/:last/:first", HandlerOk)
+	mux.ServeHTTP(w, r)
+
+	c := context.Get(r)
+	password := c.Values.Get("password")
+
+	if password != "z1on" {
+		t.Errorf("session variable set to [%s]; want [%s]", password, "z1on")
+	}
+	if w.Body.String() != "hello world" {
+		t.Errorf("Body set to [%s]; want [%s]", w.Body.String(), "hello world")
+	}
+}
+
+// TestFilterHalt tests that a route is filtered prior to handling, and then
+// halts execution (by writing to the response).
+func TestRouteFilterHalt(t *testing.T) {
+	r, _ := http.NewRequest("GET", "/person/anderson/thomas?learn=kungfu", nil)
+	w := httptest.NewRecorder()
+
+	mux := New()
+	mux.Filter(HandlerErr)
+	mux.Get("/person/:last/:first", HandlerOk)
+	mux.ServeHTTP(w, r)
+
+	if w.Code != 400 {
+		t.Errorf("Code set to [%s]; want [%s]", w.Code, http.StatusBadRequest)
+	}
+	if w.Body.String() == "hello world" {
+		t.Errorf("Body set to [%s]; want empty", w.Body.String())
+	}
+}
+
+// TestRouterFilterParam tests the Parameter filter, and ensures the
+// filter is only executed when the specified Parameter exists.
+func TestRouterFilterParam(t *testing.T) {
+	// in the first test scenario, the Parameter filter should not
+	// be triggered because the "codename" variab does not exist
+	r, _ := http.NewRequest("GET", "/neo", nil)
+	w := httptest.NewRecorder()
+
+	mux := New()
+	mux.Filter(HandlerSetVar)
+	mux.FilterParam("codename", HandlerErr)
+	mux.Get("/:nickname", HandlerOk)
+	mux.ServeHTTP(w, r)
+
+	if w.Body.String() != "hello world" {
+		t.Errorf("Body set to [%s]; want [%s]", w.Body.String(), "hello world")
+	}
+
+	// in this second scenario, the Parameter filter SHOULD fire, and should
+	// halt the request
+	w = httptest.NewRecorder()
+
+	mux = New()
+	mux.Filter(HandlerSetVar)
+	mux.FilterParam("codename", HandlerErr)
+	mux.Get("/:codename", HandlerOk)
+	mux.ServeHTTP(w, r)
+
+	if w.Body.String() == "hello world" {
+		t.Errorf("Body set to [%s]; want empty", w.Body.String())
+	}
+	if w.Code != 400 {
+		t.Errorf("Code set to [%s]; want [%s]", w.Code, http.StatusBadRequest)
+	}
+}
+
+// TestRouterFilterPath tests the Path filter, and ensures the filter
+// is only executed when the Request Path matches the filter Path.
+func TestRouterFilterPath(t *testing.T) {
+	// in the first test scenario, the Path filter should not fire
+	// because it does not take the "first name" section of the URL
+	// into account, and should therefore not match
+	r, _ := http.NewRequest("GET", "/person/anderson/thomas", nil)
+	w := httptest.NewRecorder()
+
+	mux := New()
+	mux.FilterPath("/person/*/anderson", HandlerErr)
+	mux.Get("/person/:last/:first", HandlerOk)
+	mux.ServeHTTP(w, r)
+
+	if w.Body.String() != "hello world" {
+		t.Errorf("Body set to [%s]; want [%s]", w.Body.String(), "hello world")
+	}
+
+	// in this second scenario, the Parameter filter SHOULD fire because
+	// we are filtering on all "last names", and the pattern should match
+	// the first section of the URL (person) and the last section of the
+	// url (:first)
+	w = httptest.NewRecorder()
+
+	mux = New()
+	mux.FilterPath("/person/*/thomas", HandlerErr)
+	mux.Get("/person/:last/:first", HandlerOk)
+	mux.ServeHTTP(w, r)
+
+	if w.Body.String() == "hello world" {
+		t.Errorf("Body set to [%s]; want empty", w.Body.String())
+	}
+	if w.Code != 400 {
+		t.Errorf("Code set to [%s]; want [%s]", w.Code, http.StatusBadRequest)
+	}
+}
+
+// TestNotFound tests that a 404 code is returned in the
+// response if no route matches the request url.
+func TestNotFound(t *testing.T) {
+
+	r, _ := http.NewRequest("GET", "/", nil)
+	w := httptest.NewRecorder()
+
+	mux := New()
+	mux.ServeHTTP(w, r)
+
+	if w.Code != http.StatusNotFound {
+		t.Errorf("Code set to [%s]; want [%s]", w.Code, http.StatusNotFound)
+	}
+}
+
+// Benchmark_Routes runs a benchmark against our custom Mux using the
+// default settings.
+func Benchmark_Routes(b *testing.B) {
+
+	r, _ := http.NewRequest("GET", "/person/anderson/thomas?learn=kungfu", nil)
+	w := httptest.NewRecorder()
+	mux := New()
+	mux.Get("/person/:last/:first", HandlerOk)
+
+	for i := 0; i < b.N; i++ {
+		mux.ServeHTTP(w, r)
+	}
+}
+
+// Benchmark_Routes_x30 runs a benchmark against our custom Mux using the
+// default settings, but with 30 routes
+func Benchmark_Routes_x30(b *testing.B) {
+
+	r, _ := http.NewRequest("GET", "/person/anderson/thomas?learn=kungfu", nil)
+	w := httptest.NewRecorder()
+	mux := New()
+	for i:=0;i<30;i++ {
+		mux.Get(fmt.Sprintf("/%v/:last/:first",i), HandlerOk)
+	}
+
+	// and we'll make the matching URL the LAST in the list
+	mux.Get("/person/:last/:first", HandlerOk)
+
+	for i := 0; i < b.N; i++ {
+		mux.ServeHTTP(w, r)
+	}
+}
+
+// Benchmark_ServeMux runs a benchmark against the ServeMux Go function.
+// We use this to determine performance impact of our library, when compared
+// to the out-of-the-box Mux provided by Go.
+func Benchmark_ServeMux(b *testing.B) {
+
+	r, _ := http.NewRequest("GET", "/person/anderson/thomas?learn=kungfu", nil)
+	w := httptest.NewRecorder()
+	mux := http.NewServeMux()
+	mux.HandleFunc("/", HandlerOk)
+
+	for i := 0; i < b.N; i++ {
+		r.URL.Query().Get("learn")
+		mux.ServeHTTP(w, r)
+	}
+}

vendor/src/github.com/drone/routes/exp/routes/README.md

@@ -0,0 +1,107 @@
+# routes.go
+a simple http routing API for the Go programming language
+
+    go get github.com/drone/routes
+
+for more information see:
+http://gopkgdoc.appspot.com/pkg/github.com/drone/routes
+
+[![](https://drone.io/drone/routes/status.png)](https://drone.io/drone/routes/latest)
+
+## Getting Started
+
+    package main
+
+    import (
+        "fmt"
+        "github.com/drone/routes"
+        "net/http"
+    )
+
+    func foobar (w http.ResponseWriter, r *http.Request) {
+		c := routes.NewContext(r)
+		foo := c.Params.Get(":foo")
+		bar := c.Params.Get(":bar")
+		fmt.Fprintf(w, "%s %s", foo, bar)
+    }
+
+    func main() {
+        r := routes.NewRouter()
+        r.Get("/:bar/:foo", foobar)
+
+        http.Handle("/", r)
+        http.ListenAndServe(":8088", nil)
+    }
+
+### Route Examples
+You can create routes for all http methods:
+
+    r.Get("/:param", handler)
+    r.Put("/:param", handler)
+    r.Post("/:param", handler)
+    r.Patch("/:param", handler)
+    r.Del("/:param", handler)
+
+You can specify custom regular expressions for routes:
+
+    r.Get("/files/:param(.+)", handler)
+
+You can also create routes for static files:
+
+    pwd, _ := os.Getwd()
+    r.Static("/static", pwd)
+
+this will serve any files in `/static`, including files in subdirectories. For
+example `/static/logo.gif` or `/static/style/main.css`.
+
+## Filters / Middleware
+You can implement route filters to do things like enforce security, set session
+variables, etc
+
+You can, for example, filter all request to enforce some type of security:
+
+    r.Filter(func(rw http.ResponseWriter, r *http.Request) {
+    	if r.URL.User != "admin" {
+    		http.Error(w, "", http.StatusForbidden)
+    	}
+	})
+
+You can also apply filters only when certain REST URL Parameters exist:
+
+    r.Get("/:id", handler)
+    r.Filter("id", func(rw http.ResponseWriter, r *http.Request) {
+		c := routes.NewContext(r)
+		id := c.Params.Get("id")
+
+		// verify the user has access to the specified resource id
+    	user := r.URL.User.Username()
+	    if HasAccess(user, id) == false {
+			http.Error(w, "", http.StatusForbidden)
+		}
+	})
+
+## Helper Functions
+You can use helper functions for serializing to Json and Xml. I found myself
+constantly writing code to serialize, set content type, content length, etc.
+Feel free to use these functions to eliminate redundant code in your app.
+
+Helper function for serving Json, sets content type to `application/json`:
+
+    func handler(w http.ResponseWriter, r *http.Request) {
+		mystruct := { ... }
+        routes.ServeJson(w, &mystruct)
+    }
+
+Helper function for serving Xml, sets content type to `application/xml`:
+
+    func handler(w http.ResponseWriter, r *http.Request) {
+		mystruct := { ... }
+        routes.ServeXml(w, &mystruct)
+    }
+
+Helper function to serve Xml OR Json, depending on the value of the `Accept` header:
+
+    func handler(w http.ResponseWriter, r *http.Request) {
+		mystruct := { ... }
+        routes.ServeFormatted(w, r, &mystruct)
+    }

vendor/src/github.com/drone/routes/exp/routes/bench/bench_test.go

@@ -0,0 +1,74 @@
+package bench
+
+import (
+	"fmt"
+	"net/http"
+	"net/http/httptest"
+	"testing"
+
+	"github.com/drone/routes/exp/routes"
+	gorilla "code.google.com/p/gorilla/mux"
+	"github.com/bmizerany/pat"
+)
+
+func HandlerOk(w http.ResponseWriter, r *http.Request) {
+	fmt.Fprintf(w, "hello world")
+	w.WriteHeader(http.StatusOK)
+}
+
+// Benchmark_Routes runs a benchmark against our custom Mux using the
+// default settings.
+func Benchmark_Routes(b *testing.B) {
+
+	handler := routes.NewRouter()
+	handler.Get("/person/:last/:first", HandlerOk)
+
+	for i := 0; i < b.N; i++ {
+		r, _ := http.NewRequest("GET", "/person/anderson/thomas?learn=kungfu", nil)
+		w := httptest.NewRecorder()
+		handler.ServeHTTP(w, r)
+	}
+}
+
+// Benchmark_Web runs a benchmark against the pat.go Mux using the
+// default settings.
+func Benchmark_Pat(b *testing.B) {
+
+	m := pat.New()
+	m.Get("/person/:last/:first", http.HandlerFunc(HandlerOk))
+
+	for i := 0; i < b.N; i++ {
+		r, _ := http.NewRequest("GET", "/person/anderson/thomas?learn=kungfu", nil)
+		w := httptest.NewRecorder()
+		m.ServeHTTP(w, r)
+	}
+}
+
+// Benchmark_Gorilla runs a benchmark against the Gorilla Mux using
+// the default settings.
+func Benchmark_GorillaHandler(b *testing.B) {
+
+	handler := gorilla.NewRouter()
+	handler.HandleFunc("/person/{last}/{first}", HandlerOk)
+
+	for i := 0; i < b.N; i++ {
+		r, _ := http.NewRequest("GET", "/person/anderson/thomas?learn=kungfu", nil)
+		w := httptest.NewRecorder()
+		handler.ServeHTTP(w, r)
+	}
+}
+
+// Benchmark_ServeMux runs a benchmark against the ServeMux Go function.
+// We use this to determine performance impact of our library, when compared
+// to the out-of-the-box Mux provided by Go.
+func Benchmark_ServeMux(b *testing.B) {
+
+	r, _ := http.NewRequest("GET", "/person/anderson/thomas?learn=kungfu", nil)
+	w := httptest.NewRecorder()
+	mux := http.NewServeMux()
+	mux.HandleFunc("/", HandlerOk)
+
+	for i := 0; i < b.N; i++ {
+		mux.ServeHTTP(w, r)
+	}
+}

vendor/src/github.com/drone/routes/exp/routes/context.go

@@ -0,0 +1,132 @@
+package routes
+
+import (
+	"io"
+	"net/http"
+)
+
+// Context stores data for the duration of the http.Request
+type Context struct {
+	// named parameters that are passed in via RESTful URL Parameters
+	Params Params
+
+	// named attributes that persist for the lifetime of the request
+	Values Values
+
+	// reference to the parent http.Request
+	req *http.Request
+}
+
+// Retruns the Context associated with the http.Request.
+func NewContext(r *http.Request) *Context {
+
+	// get the context bound to the http.Request
+	if v, ok := r.Body.(*wrapper); ok {
+		return v.context
+	}
+
+	// create a new context
+	c := Context{ }
+	c.Params = make(Params)
+	c.Values = make(Values)
+	c.req = r
+
+	// wrap the request and bind the context
+	wrapper := wrap(r)
+	wrapper.context = &c
+	return &c
+}
+
+// Retruns the parent http.Request to which the context is bound.
+func (c *Context) Request() *http.Request {
+	return c.req
+}
+
+// wrapper decorates an http.Request's Body (io.ReadCloser) so that we can
+// bind a Context to the Request. This is obviously a hack that i'd rather
+// avoid, however, it is for the greater good ...
+//
+// NOTE: If this turns out to be a really stupid approach we can use this
+//       approach from the go mailing list: http://goo.gl/Vw13f which I
+//       avoided because I didn't want a global lock
+type wrapper struct {
+	body    io.ReadCloser // the original message body
+	context *Context
+}
+
+func wrap(r *http.Request) *wrapper {
+	w := wrapper{ body: r.Body }
+	r.Body = &w
+	return &w
+}
+
+func (w *wrapper) Read(p []byte) (n int, err error) {
+	return w.body.Read(p)
+}
+
+func (w *wrapper) Close() error {
+	return w.body.Close()
+}
+
+// Parameter Map ---------------------------------------------------------------
+
+// Params maps a string key to a list of values.
+type Params map[string]string
+
+// Get gets the first value associated with the given key. If there are
+// no values associated with the key, Get returns the empty string.
+func (p Params) Get(key string) string {
+	if p == nil {
+		return ""
+	}
+	return p[key]
+}
+
+// Set sets the key to value. It replaces any existing values.
+func (p Params) Set(key, value string) {
+	p[key] = value
+}
+
+// Del deletes the values associated with key.
+func (p Params) Del(key string) {
+	delete(p, key)
+}
+
+// Value Map -------------------------------------------------------------------
+
+// Values maps a string key to a list of values.
+type Values map[interface{}]interface{}
+
+// Get gets the value associated with the given key. If there are
+// no values associated with the key, Get returns nil.
+func (v Values) Get(key interface{}) interface{} {
+	if v == nil {
+		return nil
+	}
+
+	return v[key]
+}
+
+// GetStr gets the value associated with the given key in string format.
+// If there are no values associated with the key, Get returns an
+// empty string.
+func (v Values) GetStr(key interface{}) interface{} {
+	if v == nil { return "" }
+	
+	val := v.Get(key)
+	if val == nil { return "" }
+
+	str, ok := val.(string)
+	if !ok { return "" }
+	return str
+}
+
+// Set sets the key to value. It replaces any existing values.
+func (v Values) Set(key, value interface{}) {
+	v[key] = value
+}
+
+// Del deletes the values associated with key.
+func (v Values) Del(key interface{}) {
+	delete(v, key)
+}

vendor/src/github.com/drone/routes/exp/routes/doc.go

@@ -0,0 +1,37 @@
+/*
+Package routes a simple http routing API for the Go programming language,
+compatible with the standard http.ListenAndServe function.
+
+Create a new route multiplexer:
+
+	r := routes.NewRouter()
+
+Define a simple route with a given method (ie Get, Put, Post ...), path and
+http.HandleFunc.
+
+	r.Get("/foo", fooHandler)
+
+Define a route with restful parameters in the path:
+
+	r.Get("/:foo/:bar", func(rw http.ResponseWriter, req *http.Request) {
+		c := routes.NewContext(req)
+		foo := c.Params.Get("foo")
+		bar := c.Params.Get("bar")
+		fmt.Fprintf(rw, "%s %s", foo, bar)
+	})
+
+The parameters are parsed from the URL, and stored in the Request Context.
+
+More control over the route's parameter matching is possible by providing
+a custom regular expression:
+
+	r.Get("/files/:file(.+)", handler)
+
+To start the web server, use the standard http.ListenAndServe
+function, and provide the route multiplexer:
+
+    http.Handle("/", r)
+    http.ListenAndServe(":8000", nil)
+
+*/
+package routes

vendor/src/github.com/drone/routes/exp/routes/helper.go

@@ -0,0 +1,96 @@
+package routes
+
+import (
+	"bytes"
+	"encoding/json"
+	"encoding/xml"
+	"io/ioutil"
+	"net/http"
+	"strconv"
+)
+
+// Helper Functions to Read from the http.Request Body -------------------------
+
+// ReadJson parses the JSON-encoded data in the http.Request object and
+// stores the result in the value pointed to by v.
+func ReadJson(r *http.Request, v interface{}) error {
+	body, err := ioutil.ReadAll(r.Body)
+	r.Body.Close()
+	if err != nil {
+		return err
+	}
+	return json.Unmarshal(body, v)
+}
+
+// ReadXml parses the XML-encoded data in the http.Request object and
+// stores the result in the value pointed to by v.
+func ReadXml(r *http.Request, v interface{}) error {
+	body, err := ioutil.ReadAll(r.Body)
+	r.Body.Close()
+	if err != nil {
+		return err
+	}
+	return xml.Unmarshal(body, v)
+}
+
+// Helper Functions to Write to the http.ReponseWriter -------------------------
+
+// ServeJson writes the JSON representation of resource v to the
+// http.ResponseWriter.
+func ServeJson(w http.ResponseWriter, v interface{}) {
+	content, err := json.MarshalIndent(v, "", "  ")
+	if err != nil {
+		http.Error(w, err.Error(), http.StatusInternalServerError)
+		return
+	}
+	w.Header().Set("Content-Length", strconv.Itoa(len(content)))
+	w.Header().Set("Content-Type", "application/json")
+	w.Write(content)
+}
+
+// ServeXml writes the XML representation of resource v to the
+// http.ResponseWriter.
+func ServeXml(w http.ResponseWriter, v interface{}) {
+	content, err := xml.Marshal(v)
+	if err != nil {
+		http.Error(w, err.Error(), http.StatusInternalServerError)
+		return
+	}
+	w.Header().Set("Content-Length", strconv.Itoa(len(content)))
+	w.Header().Set("Content-Type", "text/xml; charset=utf-8")
+	w.Write(content)
+}
+
+// ServeTemplate applies the named template to the specified data map and
+// writes the output to the http.ResponseWriter.
+func ServeTemplate(w http.ResponseWriter, name string, data map[string]interface{}) {
+	// cast the writer to the resposneWriter, get the router
+	r := w.(*responseWriter).Router
+
+	r.RLock()
+	defer r.RUnlock()
+
+	if data == nil {
+		data = map[string]interface{}{}
+	}
+
+	// append global params to the template
+	for k, v := range r.params {
+		data[k] = v
+	}
+
+	var buf bytes.Buffer
+	if err := r.views.ExecuteTemplate(&buf, name, data); err != nil {
+		panic(err)
+		return
+	}
+
+	// set the content length, type, etc
+	w.Header().Set("Content-Type", "text/html; charset=utf-8")
+	w.Write(buf.Bytes())
+}
+
+// Error will terminate the http Request with the specified error code.
+func Error(w http.ResponseWriter, code int) {
+	http.Error(w, http.StatusText(code), code)
+}

vendor/src/github.com/drone/routes/exp/routes/routes.go

@@ -0,0 +1,237 @@
+package routes
+
+import (
+	"net/http"
+	"os"
+	"path/filepath"
+	"regexp"
+	"strings"
+	"sync"
+	"text/template"
+)
+
+const (
+	DELETE  = "DELETE"
+	GET     = "GET"
+	HEAD    = "HEAD"
+	OPTIONS = "OPTIONS"
+	PATCH   = "PATCH"
+	POST    = "POST"
+	PUT     = "PUT"
+)
+
+type route struct {
+	method  string
+	regex   *regexp.Regexp
+	params  map[int]string
+	handler http.HandlerFunc
+}
+
+type Router struct {
+	sync.RWMutex
+	routes  []*route
+	filters []http.HandlerFunc
+	views   *template.Template
+	params  map[string]interface{}
+}
+
+func NewRouter() *Router {
+	r := Router{}
+	r.params = make(map[string]interface{})
+	return &r
+}
+
+// Get adds a new Route for GET requests.
+func (r *Router) Get(pattern string, handler http.HandlerFunc) {
+	r.AddRoute(GET, pattern, handler)
+}
+
+// Put adds a new Route for PUT requests.
+func (r *Router) Put(pattern string, handler http.HandlerFunc) {
+	r.AddRoute(PUT, pattern, handler)
+}
+
+// Del adds a new Route for DELETE requests.
+func (r *Router) Del(pattern string, handler http.HandlerFunc) {
+	r.AddRoute(DELETE, pattern, handler)
+}
+
+// Patch adds a new Route for PATCH requests.
+func (r *Router) Patch(pattern string, handler http.HandlerFunc) {
+	r.AddRoute(PATCH, pattern, handler)
+}
+
+// Post adds a new Route for POST requests.
+func (r *Router) Post(pattern string, handler http.HandlerFunc) {
+	r.AddRoute(POST, pattern, handler)
+}
+
+// Adds a new Route for Static http requests. Serves
+// static files from the specified directory
+func (r *Router) Static(pattern string, dir string) {
+	//append a regex to the param to match everything
+	// that comes after the prefix
+	pattern = pattern + "(.+)"
+	r.Get(pattern, func(w http.ResponseWriter, req *http.Request) {
+		path := filepath.Clean(req.URL.Path)
+		path = filepath.Join(dir, path)
+		http.ServeFile(w, req, path)
+	})
+}
+
+// Adds a new Route to the Handler
+func (r *Router) AddRoute(method string, pattern string, handler http.HandlerFunc) {
+	r.Lock()
+	defer r.Unlock()
+
+	//split the url into sections
+	parts := strings.Split(pattern, "/")
+
+	//find params that start with ":"
+	//replace with regular expressions
+	j := 0
+	params := make(map[int]string)
+	for i, part := range parts {
+		if strings.HasPrefix(part, ":") {
+			expr := "([^/]+)"
+			//a user may choose to override the defult expression
+			// similar to expressjs: ‘/user/:id([0-9]+)’ 
+			if index := strings.Index(part, "("); index != -1 {
+				expr = part[index:]
+				part = part[:index]
+			}
+			params[j] = part[1:]
+			parts[i] = expr
+			j++
+		}
+	}
+
+	//recreate the url pattern, with parameters replaced
+	//by regular expressions. then compile the regex
+	pattern = strings.Join(parts, "/")
+	regex, regexErr := regexp.Compile(pattern)
+	if regexErr != nil {
+		panic(regexErr)
+	}
+
+	route := &route{
+		method  : method,
+		regex   : regex,
+		handler : handler,
+		params  : params,
+	}
+
+	//append to the list of Routes
+	r.routes = append(r.routes, route)
+}
+
+// Filter adds the middleware filter.
+func (r *Router) Filter(filter http.HandlerFunc) {
+	r.Lock()
+	r.filters = append(r.filters, filter)
+	r.Unlock()
+}
+
+// FilterParam adds the middleware filter iff the URL parameter exists.
+func (r *Router) FilterParam(param string, filter http.HandlerFunc) {
+	r.Filter(func(w http.ResponseWriter, req *http.Request) {
+		c := NewContext(req)
+		if len(c.Params.Get(param)) > 0 { filter(w, req) }
+	})
+}
+
+// Set stores the specified key / value pair.
+func (r *Router) Set(name string, value interface{}) {
+	r.Lock()
+	r.params[name] = value
+	r.Unlock()
+}
+
+// SetEnv stores the specified environment variable as a key / value pair. If
+// the environment variable is not set the default value will be used
+func (r *Router) SetEnv(name, value string) {
+	r.Lock()
+	defer r.Unlock()
+
+	env := os.Getenv(name)
+	if len(env) == 0 { env = value }
+	r.Set(name, env)
+}
+
+// Required by http.Handler interface. This method is invoked by the
+// http server and will handle all page routing
+func (r *Router) ServeHTTP(rw http.ResponseWriter, req *http.Request) {
+	r.RLock()
+	defer r.RUnlock()
+
+	//wrap the response writer in our custom interface
+	w := &responseWriter{writer: rw, Router: r}
+
+	//find a matching Route
+	for _, route := range r.routes {
+
+		//if the methods don't match, skip this handler
+		//i.e if request.Method is 'PUT' Route.Method must be 'PUT'
+		if req.Method != route.method {
+			continue
+		}
+
+		//check if Route pattern matches url
+		if !route.regex.MatchString(req.URL.Path) {
+			continue
+		}
+
+		//get submatches (params)
+		matches := route.regex.FindStringSubmatch(req.URL.Path)
+
+		//double check that the Route matches the URL pattern.
+		if len(matches[0]) != len(req.URL.Path) {
+			continue
+		}
+
+		//create the http.Requests context
+		c := NewContext(req)
+
+		//add url parameters to the context
+		for i, match := range matches[1:] {
+			c.Params.Set(route.params[i], match)
+		}
+
+		//execute middleware filters
+		for _, filter := range r.filters {
+			filter(w, req)
+			if w.started { return }
+		}
+
+		//invoke the request handler
+		route.handler(w, req)
+		return
+	}
+
+	//if no matches to url, throw a not found exception
+	if w.started == false {
+		http.NotFound(w, req)
+	}
+}
+
+// Template uses the provided template definitions.
+func (r *Router) Template(t *template.Template) {
+	r.Lock()
+	defer r.Unlock()
+	r.views = template.Must(t.Clone())
+}
+
+// TemplateFiles parses the template definitions from the named files.
+func (r *Router) TemplateFiles(filenames ...string) {
+	r.Lock()
+	defer r.Unlock()
+	r.views = template.Must(template.ParseFiles(filenames...))
+}
+
+// TemplateGlob parses the template definitions from the files identified
+// by the pattern, which must match at least one file.
+func (r *Router) TemplateGlob(pattern string) {
+	r.Lock()
+	defer r.Unlock()
+	r.views = template.Must(template.ParseGlob(pattern))
+}

vendor/src/github.com/drone/routes/exp/routes/routes_test.go

@@ -0,0 +1,189 @@
+package routes
+
+import (
+	"fmt"
+	"net/http"
+	"net/http/httptest"
+	"testing"
+)
+
+func HandlerOk(w http.ResponseWriter, r *http.Request) {
+	fmt.Fprintf(w, "hello world")
+	w.WriteHeader(http.StatusOK)
+}
+
+func HandlerSetVar(w http.ResponseWriter, r *http.Request) {
+	c := NewContext(r)
+	c.Values.Set("password", "z1on")
+}
+
+func HandlerErr(w http.ResponseWriter, r *http.Request) {
+	http.Error(w, "", http.StatusBadRequest)
+}
+
+// TestRouteOk tests that the route is correctly handled, and the URL parameters
+// are added to the Context.
+func TestRouteOk(t *testing.T) {
+
+	r, _ := http.NewRequest("GET", "/person/anderson/thomas?learn=kungfu", nil)
+	w := httptest.NewRecorder()
+
+	mux := NewRouter()
+	mux.Get("/person/:last/:first", HandlerOk)
+	mux.ServeHTTP(w, r)
+
+	c := NewContext(r)
+	lastNameParam := c.Params.Get("last")
+	firstNameParam := c.Params.Get("first")
+
+	if lastNameParam != "anderson" {
+		t.Errorf("url param set to [%s]; want [%s]", lastNameParam, "anderson")
+	}
+	if firstNameParam != "thomas" {
+		t.Errorf("url param set to [%s]; want [%s]", firstNameParam, "thomas")
+	}
+	if w.Body.String() != "hello world" {
+		t.Errorf("Body set to [%s]; want [%s]", w.Body.String(), "hello world")
+	}
+}
+
+// TestFilter tests that a route is filtered prior to handling
+func TestRouteFilter(t *testing.T) {
+
+	r, _ := http.NewRequest("GET", "/person/anderson/thomas?learn=kungfu", nil)
+	w := httptest.NewRecorder()
+
+	mux := NewRouter()
+	mux.Filter(HandlerSetVar)
+	mux.Get("/person/:last/:first", HandlerOk)
+	mux.ServeHTTP(w, r)
+
+	c := NewContext(r)
+	password := c.Values.Get("password")
+
+	if password != "z1on" {
+		t.Errorf("session variable set to [%s]; want [%s]", password, "z1on")
+	}
+	if w.Body.String() != "hello world" {
+		t.Errorf("Body set to [%s]; want [%s]", w.Body.String(), "hello world")
+	}
+}
+
+// TestFilterHalt tests that a route is filtered prior to handling, and then
+// halts execution (by writing to the response).
+func TestRouteFilterHalt(t *testing.T) {
+	r, _ := http.NewRequest("GET", "/person/anderson/thomas?learn=kungfu", nil)
+	w := httptest.NewRecorder()
+
+	mux := NewRouter()
+	mux.Filter(HandlerErr)
+	mux.Get("/person/:last/:first", HandlerOk)
+	mux.ServeHTTP(w, r)
+
+	if w.Code != 400 {
+		t.Errorf("Code set to [%s]; want [%s]", w.Code, http.StatusBadRequest)
+	}
+	if w.Body.String() == "hello world" {
+		t.Errorf("Body set to [%s]; want empty", w.Body.String())
+	}
+}
+
+// TestParam tests the Parameter filter, and ensures the filter is only
+// executed when the specified Parameter exists.
+func TestParam(t *testing.T) {
+	// in the first test scenario, the Parameter filter should not
+	// be triggered because the "codename" variab does not exist
+	r, _ := http.NewRequest("GET", "/neo", nil)
+	w := httptest.NewRecorder()
+
+	mux := NewRouter()
+	mux.Filter(HandlerSetVar)
+	mux.FilterParam("codename", HandlerErr)
+	mux.Get("/:nickname", HandlerOk)
+	mux.ServeHTTP(w, r)
+
+	if w.Body.String() != "hello world" {
+		t.Errorf("Body set to [%s]; want [%s]", w.Body.String(), "hello world")
+	}
+
+	// in this second scenario, the Parameter filter SHOULD fire, and should
+	// halt the request
+	w = httptest.NewRecorder()
+
+	mux = NewRouter()
+	mux.Filter(HandlerSetVar)
+	mux.FilterParam("codename", HandlerErr)
+	mux.Get("/:codename", HandlerOk)
+	mux.ServeHTTP(w, r)
+
+	if w.Body.String() == "hello world" {
+		t.Errorf("Body set to [%s]; want empty", w.Body.String())
+	}
+	if w.Code != 400 {
+		t.Errorf("Code set to [%s]; want [%s]", w.Code, http.StatusBadRequest)
+	}
+}
+
+/*
+// TestTemplate tests template rendering
+func TestTemplate(t *testing.T) {
+
+	w := httptest.NewRecorder()
+
+	tmpl, _ := template.New("template.html").Parse("<html><head><title>{{ .Title }}</title><body>{{ .Name }}</body></html>")
+
+	mux := NewRouter()
+	mux.Template(tmpl)
+	mux.Set("Title", "Matrix")
+	mux.ExecuteTemplate(w, "template.html", map[string]interface{}{ "Name" : "Morpheus" })
+
+	if w.Body.String() != "<html><head><title>Matrix</title><body>Morpheus</body></html>" {
+		t.Errorf("template not rendered correctly [%s]", w.Body.String())
+	}
+}
+*/
+
+// TestNotFound tests that a 404 code is returned in the
+// response if no route matches the request url.
+func TestNotFound(t *testing.T) {
+
+	r, _ := http.NewRequest("GET", "/", nil)
+	w := httptest.NewRecorder()
+
+	mux := NewRouter()
+	mux.ServeHTTP(w, r)
+
+	if w.Code != http.StatusNotFound {
+		t.Errorf("Code set to [%s]; want [%s]", w.Code, http.StatusNotFound)
+	}
+}
+
+// Benchmark_Routes runs a benchmark against our custom Mux using the
+// default settings.
+func Benchmark_Routes(b *testing.B) {
+
+	r, _ := http.NewRequest("GET", "/person/anderson/thomas?learn=kungfu", nil)
+	w := httptest.NewRecorder()
+	mux := NewRouter()
+	mux.Get("/person/:last/:first", HandlerOk)
+
+	for i := 0; i < b.N; i++ {
+		mux.ServeHTTP(w, r)
+	}
+}
+
+// Benchmark_ServeMux runs a benchmark against the ServeMux Go function.
+// We use this to determine performance impact of our library, when compared
+// to the out-of-the-box Mux provided by Go.
+func Benchmark_ServeMux(b *testing.B) {
+
+	r, _ := http.NewRequest("GET", "/person/anderson/thomas?learn=kungfu", nil)
+	w := httptest.NewRecorder()
+	mux := http.NewServeMux()
+	mux.HandleFunc("/", HandlerOk)
+
+	for i := 0; i < b.N; i++ {
+		r.URL.Query().Get("learn")
+		mux.ServeHTTP(w, r)
+	}
+}

vendor/src/github.com/drone/routes/exp/routes/writer.go

@@ -0,0 +1,42 @@
+package routes
+
+import (
+	"bufio"
+	"net"
+	"net/http"
+)
+
+// ResponseWriter is a wrapper for the http.ResponseWriter to track if
+// response was written to.
+type responseWriter struct {
+	Router  *Router
+	writer  http.ResponseWriter
+	started bool
+	status  int
+}
+
+// Header returns the header map that will be sent by WriteHeader.
+func (w *responseWriter) Header() http.Header {
+	return w.writer.Header()
+}
+
+// Write writes the data to the connection as part of an HTTP reply,
+// and sets `started` to true
+func (w *responseWriter) Write(p []byte) (int, error) {
+	w.started = true
+	return w.writer.Write(p)
+}
+
+// WriteHeader sends an HTTP response header with status code,
+// and sets `started` to true
+func (w *responseWriter) WriteHeader(code int) {
+	w.status = code
+	w.started = true
+	w.writer.WriteHeader(code)
+}
+
+// The Hijacker interface is implemented by ResponseWriters that allow an
+// HTTP handler to take over the connection.
+func (w *responseWriter) Hijack() (net.Conn, *bufio.ReadWriter, error) {
+	return w.writer.(http.Hijacker).Hijack()
+}

vendor/src/github.com/drone/routes/exp/user/user.go

@@ -0,0 +1,84 @@
+package user
+
+import (
+	"net/url"
+	"github.com/drone/routes/exp/context"
+)
+
+// Key used to store the user in the session
+const userKey = "_user"
+
+// User represents a user of the application.
+type User struct {
+    Id    string // the unique permanent ID of the user.
+	Name  string // the human-readable ID of the user.
+	Email string
+	Photo string
+
+    FederatedIdentity string
+    FederatedProvider string
+
+	// additional, custom Attributes
+	Attrs map[string]string
+}
+
+// Decode will create a user from a URL Query string.
+func Decode(v string) *User {
+	values, err := url.ParseQuery(v)
+	if err != nil {
+		return nil
+	}
+
+	attrs := map[string]string{}
+	for key, _ := range values {
+		attrs[key]=values.Get(key)
+	}
+
+	return &User {
+		Id    : values.Get("id"),
+		Name  : values.Get("name"),
+		Email : values.Get("email"),
+		Photo : values.Get("photo"),
+		Attrs : attrs,
+	}
+}
+
+// Encode will encode a user as a URL query string.
+func (u *User) Encode() string {
+	values := url.Values{}
+
+	// add custom attributes
+	if u.Attrs != nil {
+		for key, val := range u.Attrs {
+			values.Set(key, val)
+		}
+	}
+
+	values.Set("id", u.Id)
+	values.Set("name", u.Name)
+	values.Set("email", u.Email)
+	values.Set("photo", u.Photo)
+	return values.Encode()
+}
+
+// Current returns the currently logged-in user, or nil if the user is not
+// signed in.
+func Current(c *context.Context) *User {
+	v := c.Values.Get(userKey)
+	if v == nil {
+		return nil
+	}
+
+	u, ok := v.(*User)
+	if !ok {
+		return nil
+	}
+
+	return u
+}
+
+// Set sets the currently logged-in user. This is typically used by middleware
+// that handles user authentication.
+func Set(c *context.Context, u *User) {
+	c.Values.Set(userKey, u)
+}

vendor/src/github.com/drone/routes/routes.go

@@ -0,0 +1,317 @@
+package routes
+
+import (
+	"encoding/json"
+	"encoding/xml"
+	"io/ioutil"
+	"net/http"
+	"net/url"
+	"path/filepath"
+	"regexp"
+	"strconv"
+	"strings"
+)
+
+const (
+	CONNECT = "CONNECT"
+	DELETE  = "DELETE"
+	GET     = "GET"
+	HEAD    = "HEAD"
+	OPTIONS = "OPTIONS"
+	PATCH   = "PATCH"
+	POST    = "POST"
+	PUT     = "PUT"
+	TRACE   = "TRACE"
+)
+
+//commonly used mime-types
+const (
+	applicationJson = "application/json"
+	applicationXml  = "application/xml"
+	textXml         = "text/xml"
+)
+
+type route struct {
+	method  string
+	regex   *regexp.Regexp
+	params  map[int]string
+	handler http.HandlerFunc
+}
+
+type RouteMux struct {
+	routes  []*route
+	filters []http.HandlerFunc
+}
+
+func New() *RouteMux {
+	return &RouteMux{}
+}
+
+// Get adds a new Route for GET requests.
+func (m *RouteMux) Get(pattern string, handler http.HandlerFunc) {
+	m.AddRoute(GET, pattern, handler)
+}
+
+// Put adds a new Route for PUT requests.
+func (m *RouteMux) Put(pattern string, handler http.HandlerFunc) {
+	m.AddRoute(PUT, pattern, handler)
+}
+
+// Del adds a new Route for DELETE requests.
+func (m *RouteMux) Del(pattern string, handler http.HandlerFunc) {
+	m.AddRoute(DELETE, pattern, handler)
+}
+
+// Patch adds a new Route for PATCH requests.
+func (m *RouteMux) Patch(pattern string, handler http.HandlerFunc) {
+	m.AddRoute(PATCH, pattern, handler)
+}
+
+// Post adds a new Route for POST requests.
+func (m *RouteMux) Post(pattern string, handler http.HandlerFunc) {
+	m.AddRoute(POST, pattern, handler)
+}
+
+// Adds a new Route for Static http requests. Serves
+// static files from the specified directory
+func (m *RouteMux) Static(pattern string, dir string) {
+	//append a regex to the param to match everything
+	// that comes after the prefix
+	pattern = pattern + "(.+)"
+	m.AddRoute(GET, pattern, func(w http.ResponseWriter, r *http.Request) {
+		path := filepath.Clean(r.URL.Path)
+		path = filepath.Join(dir, path)
+		http.ServeFile(w, r, path)
+	})
+}
+
+// Adds a new Route to the Handler
+func (m *RouteMux) AddRoute(method string, pattern string, handler http.HandlerFunc) {
+
+	//split the url into sections
+	parts := strings.Split(pattern, "/")
+
+	//find params that start with ":"
+	//replace with regular expressions
+	j := 0
+	params := make(map[int]string)
+	for i, part := range parts {
+		if strings.HasPrefix(part, ":") {
+			expr := "([^/]+)"
+			//a user may choose to override the defult expression
+			// similar to expressjs: ‘/user/:id([0-9]+)’ 
+			if index := strings.Index(part, "("); index != -1 {
+				expr = part[index:]
+				part = part[:index]
+			}
+			params[j] = part
+			parts[i] = expr
+			j++
+		}
+	}
+
+	//recreate the url pattern, with parameters replaced
+	//by regular expressions. then compile the regex
+	pattern = strings.Join(parts, "/")
+	regex, regexErr := regexp.Compile(pattern)
+	if regexErr != nil {
+		//TODO add error handling here to avoid panic
+		panic(regexErr)
+		return
+	}
+
+	//now create the Route
+	route := &route{}
+	route.method = method
+	route.regex = regex
+	route.handler = handler
+	route.params = params
+
+	//and finally append to the list of Routes
+	m.routes = append(m.routes, route)
+}
+
+// Filter adds the middleware filter.
+func (m *RouteMux) Filter(filter http.HandlerFunc) {
+	m.filters = append(m.filters, filter)
+}
+
+// FilterParam adds the middleware filter iff the REST URL parameter exists.
+func (m *RouteMux) FilterParam(param string, filter http.HandlerFunc) {
+	if !strings.HasPrefix(param,":") {
+		param = ":"+param
+	}
+
+	m.Filter(func(w http.ResponseWriter, r *http.Request) {
+		p := r.URL.Query().Get(param)
+		if len(p) > 0 { filter(w, r) }
+	})
+}
+
+// Required by http.Handler interface. This method is invoked by the
+// http server and will handle all page routing
+func (m *RouteMux) ServeHTTP(rw http.ResponseWriter, r *http.Request) {
+
+	requestPath := r.URL.Path
+
+	//wrap the response writer, in our custom interface
+	w := &responseWriter{writer: rw}
+
+	//find a matching Route
+	for _, route := range m.routes {
+
+		//if the methods don't match, skip this handler
+		//i.e if request.Method is 'PUT' Route.Method must be 'PUT'
+		if r.Method != route.method {
+			continue
+		}
+
+		//check if Route pattern matches url
+		if !route.regex.MatchString(requestPath) {
+			continue
+		}
+
+		//get submatches (params)
+		matches := route.regex.FindStringSubmatch(requestPath)
+
+		//double check that the Route matches the URL pattern.
+		if len(matches[0]) != len(requestPath) {
+			continue
+		}
+
+		if len(route.params) > 0 {
+			//add url parameters to the query param map
+			values := r.URL.Query()
+			for i, match := range matches[1:] {
+				values.Add(route.params[i], match)
+			}
+
+			//reassemble query params and add to RawQuery
+			r.URL.RawQuery = url.Values(values).Encode() + "&" + r.URL.RawQuery
+			//r.URL.RawQuery = url.Values(values).Encode()
+		}
+
+		//execute middleware filters
+		for _, filter := range m.filters {
+			filter(w, r)
+			if w.started {
+				return
+			}
+		}
+
+		//Invoke the request handler
+		route.handler(w, r)
+		break
+	}
+
+	//if no matches to url, throw a not found exception
+	if w.started == false {
+		http.NotFound(w, r)
+	}
+}
+
+// -----------------------------------------------------------------------------
+// Simple wrapper around a ResponseWriter
+
+// responseWriter is a wrapper for the http.ResponseWriter
+// to track if response was written to. It also allows us
+// to automatically set certain headers, such as Content-Type,
+// Access-Control-Allow-Origin, etc.
+type responseWriter struct {
+	writer  http.ResponseWriter
+	started bool
+	status  int
+}
+
+// Header returns the header map that will be sent by WriteHeader.
+func (w *responseWriter) Header() http.Header {
+	return w.writer.Header()
+}
+
+// Write writes the data to the connection as part of an HTTP reply,
+// and sets `started` to true
+func (w *responseWriter) Write(p []byte) (int, error) {
+	w.started = true
+	return w.writer.Write(p)
+}
+
+// WriteHeader sends an HTTP response header with status code,
+// and sets `started` to true
+func (w *responseWriter) WriteHeader(code int) {
+	w.status = code
+	w.started = true
+	w.writer.WriteHeader(code)
+}
+
+// -----------------------------------------------------------------------------
+// Below are helper functions to replace boilerplate
+// code that serializes resources and writes to the
+// http response.
+
+// ServeJson replies to the request with a JSON
+// representation of resource v.
+func ServeJson(w http.ResponseWriter, v interface{}) {
+	content, err := json.MarshalIndent(v, "", "  ")
+	if err != nil {
+		http.Error(w, err.Error(), http.StatusInternalServerError)
+		return
+	}
+	w.Header().Set("Content-Length", strconv.Itoa(len(content)))
+	w.Header().Set("Content-Type", applicationJson)
+	w.Write(content)
+}
+
+// ReadJson will parses the JSON-encoded data in the http
+// Request object and stores the result in the value
+// pointed to by v.
+func ReadJson(r *http.Request, v interface{}) error {
+	body, err := ioutil.ReadAll(r.Body)
+	r.Body.Close()
+	if err != nil {
+		return err
+	}
+	return json.Unmarshal(body, v)
+}
+
+// ServeXml replies to the request with an XML
+// representation of resource v.
+func ServeXml(w http.ResponseWriter, v interface{}) {
+	content, err := xml.Marshal(v)
+	if err != nil {
+		http.Error(w, err.Error(), http.StatusInternalServerError)
+		return
+	}
+	w.Header().Set("Content-Length", strconv.Itoa(len(content)))
+	w.Header().Set("Content-Type", "text/xml; charset=utf-8")
+	w.Write(content)
+}
+
+// ReadXml will parses the XML-encoded data in the http
+// Request object and stores the result in the value
+// pointed to by v.
+func ReadXml(r *http.Request, v interface{}) error {
+	body, err := ioutil.ReadAll(r.Body)
+	r.Body.Close()
+	if err != nil {
+		return err
+	}
+	return xml.Unmarshal(body, v)
+}
+
+// ServeFormatted replies to the request with
+// a formatted representation of resource v, in the
+// format requested by the client specified in the
+// Accept header.
+func ServeFormatted(w http.ResponseWriter, r *http.Request, v interface{}) {
+	accept := r.Header.Get("Accept")
+	switch accept {
+	case applicationJson:
+		ServeJson(w, v)
+	case applicationXml, textXml:
+		ServeXml(w, v)
+	default:
+		ServeJson(w, v)
+	}
+
+	return
+}

vendor/src/github.com/drone/routes/routes_test.go

@@ -0,0 +1,193 @@
+package routes
+
+import (
+	"fmt"
+	"io/ioutil"
+	"net/http"
+	"net/http/httptest"
+	"net/url"
+	"os"
+	"testing"
+)
+
+var HandlerOk = func(w http.ResponseWriter, r *http.Request) {
+	fmt.Fprintf(w, "hello world")
+	w.WriteHeader(http.StatusOK)
+}
+
+var HandlerErr = func(w http.ResponseWriter, r *http.Request) {
+	http.Error(w, "", http.StatusBadRequest)
+}
+
+var FilterUser = func(w http.ResponseWriter, r *http.Request) {
+	if r.URL.User == nil || r.URL.User.Username() != "admin" {
+		http.Error(w, "", http.StatusUnauthorized)
+	}
+}
+
+var FilterId = func(w http.ResponseWriter, r *http.Request) {
+	id := r.URL.Query().Get(":id")
+	if id == "admin" {
+		http.Error(w, "", http.StatusUnauthorized)
+	}
+}
+
+// TestAuthOk tests that an Auth handler will append the
+// username and password to to the request URL, and will
+// continue processing the request by invoking the handler.
+func TestRouteOk(t *testing.T) {
+
+	r, _ := http.NewRequest("GET", "/person/anderson/thomas?learn=kungfu", nil)
+	w := httptest.NewRecorder()
+
+	handler := new(RouteMux)
+	handler.Get("/person/:last/:first", HandlerOk)
+	handler.ServeHTTP(w, r)
+
+	lastNameParam := r.URL.Query().Get(":last")
+	firstNameParam := r.URL.Query().Get(":first")
+	learnParam := r.URL.Query().Get("learn")
+
+	if lastNameParam != "anderson" {
+		t.Errorf("url param set to [%s]; want [%s]", lastNameParam, "anderson")
+	}
+	if firstNameParam != "thomas" {
+		t.Errorf("url param set to [%s]; want [%s]", firstNameParam, "thomas")
+	}
+	if learnParam != "kungfu" {
+		t.Errorf("url param set to [%s]; want [%s]", learnParam, "kungfu")
+	}
+}
+
+// TestNotFound tests that a 404 code is returned in the
+// response if no route matches the request url.
+func TestNotFound(t *testing.T) {
+
+	r, _ := http.NewRequest("GET", "/", nil)
+	w := httptest.NewRecorder()
+
+	handler := new(RouteMux)
+	handler.ServeHTTP(w, r)
+
+	if w.Code != http.StatusNotFound {
+		t.Errorf("Code set to [%v]; want [%v]", w.Code, http.StatusNotFound)
+	}
+}
+
+// TestStatic tests the ability to serve static
+// content from the filesystem
+func TestStatic(t *testing.T) {
+
+	r, _ := http.NewRequest("GET", "/routes_test.go", nil)
+	w := httptest.NewRecorder()
+	pwd, _ := os.Getwd()
+
+	handler := new(RouteMux)
+	handler.Static("/", pwd)
+	handler.ServeHTTP(w, r)
+
+	testFile, _ := ioutil.ReadFile(pwd + "/routes_test.go")
+	if w.Body.String() != string(testFile) {
+		t.Errorf("handler.Static failed to serve file")
+	}
+}
+
+// TestFilter tests the ability to apply middleware function
+// to filter all routes
+func TestFilter(t *testing.T) {
+
+	r, _ := http.NewRequest("GET", "/", nil)
+	w := httptest.NewRecorder()
+
+	handler := new(RouteMux)
+	handler.Get("/", HandlerOk)
+	handler.Filter(FilterUser)
+	handler.ServeHTTP(w, r)
+
+	if w.Code != http.StatusUnauthorized {
+		t.Errorf("Did not apply Filter. Code set to [%v]; want [%v]", w.Code, http.StatusUnauthorized)
+	}
+
+	r, _ = http.NewRequest("GET", "/", nil)
+	r.URL.User = url.User("admin")
+	w = httptest.NewRecorder()
+	handler.ServeHTTP(w, r)
+
+	if w.Code != http.StatusOK {
+		t.Errorf("Code set to [%v]; want [%v]", w.Code, http.StatusOK)
+	}
+}
+
+// TestFilterParam tests the ability to apply middleware
+// function to filter all routes with specified parameter
+// in the REST url
+func TestFilterParam(t *testing.T) {
+
+	r, _ := http.NewRequest("GET", "/:id", nil)
+	w := httptest.NewRecorder()
+
+	// first test that the param filter does not trigger
+	handler := new(RouteMux)
+	handler.Get("/", HandlerOk)
+	handler.Get("/:id", HandlerOk)
+	handler.FilterParam("id", FilterId)
+	handler.ServeHTTP(w, r)
+
+	if w.Code != http.StatusOK {
+		t.Errorf("Code set to [%v]; want [%v]", w.Code, http.StatusOK)
+	}
+
+	// now test the param filter does trigger
+	r, _ = http.NewRequest("GET", "/admin", nil)
+	w = httptest.NewRecorder()
+	handler.ServeHTTP(w, r)
+
+	if w.Code != http.StatusUnauthorized {
+		t.Errorf("Did not apply Param Filter. Code set to [%v]; want [%v]", w.Code, http.StatusUnauthorized)
+	}
+
+}
+
+// Benchmark_RoutedHandler runs a benchmark against
+// the RouteMux using the default settings.
+func Benchmark_RoutedHandler(b *testing.B) {
+	handler := new(RouteMux)
+	handler.Get("/", HandlerOk)
+
+	for i := 0; i < b.N; i++ {
+		r, _ := http.NewRequest("GET", "/", nil)
+		w := httptest.NewRecorder()
+		handler.ServeHTTP(w, r)
+	}
+}
+
+// Benchmark_RoutedHandler runs a benchmark against
+// the RouteMux using the default settings with REST
+// URL params.
+func Benchmark_RoutedHandlerParams(b *testing.B) {
+
+	handler := new(RouteMux)
+	handler.Get("/:user", HandlerOk)
+
+	for i := 0; i < b.N; i++ {
+		r, _ := http.NewRequest("GET", "/admin", nil)
+		w := httptest.NewRecorder()
+		handler.ServeHTTP(w, r)
+	}
+}
+
+// Benchmark_ServeMux runs a benchmark against
+// the ServeMux Go function. We use this to determine
+// performance impact of our library, when compared
+// to the out-of-the-box Mux provided by Go.
+func Benchmark_ServeMux(b *testing.B) {
+
+	r, _ := http.NewRequest("GET", "/", nil)
+	w := httptest.NewRecorder()
+	mux := http.NewServeMux()
+	mux.HandleFunc("/", HandlerOk)
+
+	for i := 0; i < b.N; i++ {
+		mux.ServeHTTP(w, r)
+	}
+}

vendor/src/github.com/garyburd/redigo/LICENSE

@@ -0,0 +1,175 @@
+
+                                 Apache License
+                           Version 2.0, January 2004
+                        http://www.apache.org/licenses/
+
+   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+   1. Definitions.
+
+      "License" shall mean the terms and conditions for use, reproduction,
+      and distribution as defined by Sections 1 through 9 of this document.
+
+      "Licensor" shall mean the copyright owner or entity authorized by
+      the copyright owner that is granting the License.
+
+      "Legal Entity" shall mean the union of the acting entity and all
+      other entities that control, are controlled by, or are under common
+      control with that entity. For the purposes of this definition,
+      "control" means (i) the power, direct or indirect, to cause the
+      direction or management of such entity, whether by contract or
+      otherwise, or (ii) ownership of fifty percent (50%) or more of the
+      outstanding shares, or (iii) beneficial ownership of such entity.
+
+      "You" (or "Your") shall mean an individual or Legal Entity
+      exercising permissions granted by this License.
+
+      "Source" form shall mean the preferred form for making modifications,
+      including but not limited to software source code, documentation
+      source, and configuration files.
+
+      "Object" form shall mean any form resulting from mechanical
+      transformation or translation of a Source form, including but
+      not limited to compiled object code, generated documentation,
+      and conversions to other media types.
+
+      "Work" shall mean the work of authorship, whether in Source or
+      Object form, made available under the License, as indicated by a
+      copyright notice that is included in or attached to the work
+      (an example is provided in the Appendix below).
+
+      "Derivative Works" shall mean any work, whether in Source or Object
+      form, that is based on (or derived from) the Work and for which the
+      editorial revisions, annotations, elaborations, or other modifications
+      represent, as a whole, an original work of authorship. For the purposes
+      of this License, Derivative Works shall not include works that remain
+      separable from, or merely link (or bind by name) to the interfaces of,
+      the Work and Derivative Works thereof.
+
+      "Contribution" shall mean any work of authorship, including
+      the original version of the Work and any modifications or additions
+      to that Work or Derivative Works thereof, that is intentionally
+      submitted to Licensor for inclusion in the Work by the copyright owner
+      or by an individual or Legal Entity authorized to submit on behalf of
+      the copyright owner. For the purposes of this definition, "submitted"
+      means any form of electronic, verbal, or written communication sent
+      to the Licensor or its representatives, including but not limited to
+      communication on electronic mailing lists, source code control systems,
+      and issue tracking systems that are managed by, or on behalf of, the
+      Licensor for the purpose of discussing and improving the Work, but
+      excluding communication that is conspicuously marked or otherwise
+      designated in writing by the copyright owner as "Not a Contribution."
+
+      "Contributor" shall mean Licensor and any individual or Legal Entity
+      on behalf of whom a Contribution has been received by Licensor and
+      subsequently incorporated within the Work.
+
+   2. Grant of Copyright License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      copyright license to reproduce, prepare Derivative Works of,
+      publicly display, publicly perform, sublicense, and distribute the
+      Work and such Derivative Works in Source or Object form.
+
+   3. Grant of Patent License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      (except as stated in this section) patent license to make, have made,
+      use, offer to sell, sell, import, and otherwise transfer the Work,
+      where such license applies only to those patent claims licensable
+      by such Contributor that are necessarily infringed by their
+      Contribution(s) alone or by combination of their Contribution(s)
+      with the Work to which such Contribution(s) was submitted. If You
+      institute patent litigation against any entity (including a
+      cross-claim or counterclaim in a lawsuit) alleging that the Work
+      or a Contribution incorporated within the Work constitutes direct
+      or contributory patent infringement, then any patent licenses
+      granted to You under this License for that Work shall terminate
+      as of the date such litigation is filed.
+
+   4. Redistribution. You may reproduce and distribute copies of the
+      Work or Derivative Works thereof in any medium, with or without
+      modifications, and in Source or Object form, provided that You
+      meet the following conditions:
+
+      (a) You must give any other recipients of the Work or
+          Derivative Works a copy of this License; and
+
+      (b) You must cause any modified files to carry prominent notices
+          stating that You changed the files; and
+
+      (c) You must retain, in the Source form of any Derivative Works
+          that You distribute, all copyright, patent, trademark, and
+          attribution notices from the Source form of the Work,
+          excluding those notices that do not pertain to any part of
+          the Derivative Works; and
+
+      (d) If the Work includes a "NOTICE" text file as part of its
+          distribution, then any Derivative Works that You distribute must
+          include a readable copy of the attribution notices contained
+          within such NOTICE file, excluding those notices that do not
+          pertain to any part of the Derivative Works, in at least one
+          of the following places: within a NOTICE text file distributed
+          as part of the Derivative Works; within the Source form or
+          documentation, if provided along with the Derivative Works; or,
+          within a display generated by the Derivative Works, if and
+          wherever such third-party notices normally appear. The contents
+          of the NOTICE file are for informational purposes only and
+          do not modify the License. You may add Your own attribution
+          notices within Derivative Works that You distribute, alongside
+          or as an addendum to the NOTICE text from the Work, provided
+          that such additional attribution notices cannot be construed
+          as modifying the License.
+
+      You may add Your own copyright statement to Your modifications and
+      may provide additional or different license terms and conditions
+      for use, reproduction, or distribution of Your modifications, or
+      for any such Derivative Works as a whole, provided Your use,
+      reproduction, and distribution of the Work otherwise complies with
+      the conditions stated in this License.
+
+   5. Submission of Contributions. Unless You explicitly state otherwise,
+      any Contribution intentionally submitted for inclusion in the Work
+      by You to the Licensor shall be under the terms and conditions of
+      this License, without any additional terms or conditions.
+      Notwithstanding the above, nothing herein shall supersede or modify
+      the terms of any separate license agreement you may have executed
+      with Licensor regarding such Contributions.
+
+   6. Trademarks. This License does not grant permission to use the trade
+      names, trademarks, service marks, or product names of the Licensor,
+      except as required for reasonable and customary use in describing the
+      origin of the Work and reproducing the content of the NOTICE file.
+
+   7. Disclaimer of Warranty. Unless required by applicable law or
+      agreed to in writing, Licensor provides the Work (and each
+      Contributor provides its Contributions) on an "AS IS" BASIS,
+      WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+      implied, including, without limitation, any warranties or conditions
+      of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A
+      PARTICULAR PURPOSE. You are solely responsible for determining the
+      appropriateness of using or redistributing the Work and assume any
+      risks associated with Your exercise of permissions under this License.
+
+   8. Limitation of Liability. In no event and under no legal theory,
+      whether in tort (including negligence), contract, or otherwise,
+      unless required by applicable law (such as deliberate and grossly
+      negligent acts) or agreed to in writing, shall any Contributor be
+      liable to You for damages, including any direct, indirect, special,
+      incidental, or consequential damages of any character arising as a
+      result of this License or out of the use or inability to use the
+      Work (including but not limited to damages for loss of goodwill,
+      work stoppage, computer failure or malfunction, or any and all
+      other commercial damages or losses), even if such Contributor
+      has been advised of the possibility of such damages.
+
+   9. Accepting Warranty or Additional Liability. While redistributing
+      the Work or Derivative Works thereof, You may choose to offer,
+      and charge a fee for, acceptance of support, warranty, indemnity,
+      or other liability obligations and/or rights consistent with this
+      License. However, in accepting such obligations, You may act only
+      on Your own behalf and on Your sole responsibility, not on behalf
+      of any other Contributor, and only if You agree to indemnify,
+      defend, and hold each Contributor harmless for any liability
+      incurred by, or claims asserted against, such Contributor by reason
+      of your accepting any such warranty or additional liability.

vendor/src/github.com/garyburd/redigo/README.markdown

@@ -0,0 +1,44 @@
+Redigo
+======
+
+Redigo is a [Go](http://golang.org/) client for the [Redis](http://redis.io/) database.
+
+Features
+-------
+
+* A [Print-like](http://godoc.org/github.com/garyburd/redigo/redis#hdr-Executing_Commands) API with support for all Redis commands.
+* [Pipelining](http://godoc.org/github.com/garyburd/redigo/redis#hdr-Pipelining), including pipelined transactions.
+* [Publish/Subscribe](http://godoc.org/github.com/garyburd/redigo/redis#hdr-Publish_and_Subscribe).
+* [Connection pooling](http://godoc.org/github.com/garyburd/redigo/redis#Pool).
+* [Script helper type](http://godoc.org/github.com/garyburd/redigo/redis#Script) with optimistic use of EVALSHA.
+* [Helper functions](http://godoc.org/github.com/garyburd/redigo/redis#hdr-Reply_Helpers) for working with command replies.
+
+Documentation
+-------------
+
+- [API Reference](http://godoc.org/github.com/garyburd/redigo/redis)
+- [FAQ](https://github.com/garyburd/redigo/wiki/FAQ)
+
+Installation
+------------
+
+Install Redigo using the "go get" command:
+
+    go get github.com/garyburd/redigo/redis
+
+The Go distribution is Redigo's only dependency.
+
+Contributing
+------------
+
+Contributions are welcome. 
+
+Before writing code, send mail to gary@beagledreams.com to discuss what you
+plan to do. This gives me a chance to validate the design, avoid duplication of
+effort and ensure that the changes fit the goals of the project. Do not start
+the discussion with a pull request. 
+
+License
+-------
+
+Redigo is available under the [Apache License, Version 2.0](http://www.apache.org/licenses/LICENSE-2.0.html).

vendor/src/github.com/garyburd/redigo/internal/commandinfo.go

@@ -0,0 +1,54 @@
+// Copyright 2014 Gary Burd
+//
+// Licensed under the Apache License, Version 2.0 (the "License"): you may
+// not use this file except in compliance with the License. You may obtain
+// a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+// License for the specific language governing permissions and limitations
+// under the License.
+
+package internal // import "github.com/garyburd/redigo/internal"
+
+import (
+	"strings"
+)
+
+const (
+	WatchState = 1 << iota
+	MultiState
+	SubscribeState
+	MonitorState
+)
+
+type CommandInfo struct {
+	Set, Clear int
+}
+
+var commandInfos = map[string]CommandInfo{
+	"WATCH":      {Set: WatchState},
+	"UNWATCH":    {Clear: WatchState},
+	"MULTI":      {Set: MultiState},
+	"EXEC":       {Clear: WatchState | MultiState},
+	"DISCARD":    {Clear: WatchState | MultiState},
+	"PSUBSCRIBE": {Set: SubscribeState},
+	"SUBSCRIBE":  {Set: SubscribeState},
+	"MONITOR":    {Set: MonitorState},
+}
+
+func init() {
+	for n, ci := range commandInfos {
+		commandInfos[strings.ToLower(n)] = ci
+	}
+}
+
+func LookupCommandInfo(commandName string) CommandInfo {
+	if ci, ok := commandInfos[commandName]; ok {
+		return ci
+	}
+	return commandInfos[strings.ToUpper(commandName)]
+}

vendor/src/github.com/garyburd/redigo/internal/commandinfo_test.go

@@ -0,0 +1,27 @@
+package internal
+
+import "testing"
+
+func TestLookupCommandInfo(t *testing.T) {
+	for _, n := range []string{"watch", "WATCH", "wAtch"} {
+		if LookupCommandInfo(n) == (CommandInfo{}) {
+			t.Errorf("LookupCommandInfo(%q) = CommandInfo{}, expected non-zero value", n)
+		}
+	}
+}
+
+func benchmarkLookupCommandInfo(b *testing.B, names ...string) {
+	for i := 0; i < b.N; i++ {
+		for _, c := range names {
+			LookupCommandInfo(c)
+		}
+	}
+}
+
+func BenchmarkLookupCommandInfoCorrectCase(b *testing.B) {
+	benchmarkLookupCommandInfo(b, "watch", "WATCH", "monitor", "MONITOR")
+}
+
+func BenchmarkLookupCommandInfoMixedCase(b *testing.B) {
+	benchmarkLookupCommandInfo(b, "wAtch", "WeTCH", "monItor", "MONiTOR")
+}

vendor/src/github.com/garyburd/redigo/internal/redistest/testdb.go

@@ -0,0 +1,65 @@
+// Copyright 2014 Gary Burd
+//
+// Licensed under the Apache License, Version 2.0 (the "License"): you may
+// not use this file except in compliance with the License. You may obtain
+// a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+// License for the specific language governing permissions and limitations
+// under the License.
+
+// Package redistest contains utilities for writing Redigo tests.
+package redistest
+
+import (
+	"errors"
+	"time"
+
+	"github.com/garyburd/redigo/redis"
+)
+
+type testConn struct {
+	redis.Conn
+}
+
+func (t testConn) Close() error {
+	_, err := t.Conn.Do("SELECT", "9")
+	if err != nil {
+		return nil
+	}
+	_, err = t.Conn.Do("FLUSHDB")
+	if err != nil {
+		return err
+	}
+	return t.Conn.Close()
+}
+
+// Dial dials the local Redis server and selects database 9. To prevent
+// stomping on real data, DialTestDB fails if database 9 contains data. The
+// returned connection flushes database 9 on close.
+func Dial() (redis.Conn, error) {
+	c, err := redis.DialTimeout("tcp", ":6379", 0, 1*time.Second, 1*time.Second)
+	if err != nil {
+		return nil, err
+	}
+
+	_, err = c.Do("SELECT", "9")
+	if err != nil {
+		return nil, err
+	}
+
+	n, err := redis.Int(c.Do("DBSIZE"))
+	if err != nil {
+		return nil, err
+	}
+
+	if n != 0 {
+		return nil, errors.New("database #9 is not empty, test can not continue")
+	}
+
+	return testConn{c}, nil
+}

vendor/src/github.com/garyburd/redigo/redis/conn.go

@@ -0,0 +1,455 @@
+// Copyright 2012 Gary Burd
+//
+// Licensed under the Apache License, Version 2.0 (the "License"): you may
+// not use this file except in compliance with the License. You may obtain
+// a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+// License for the specific language governing permissions and limitations
+// under the License.
+
+package redis
+
+import (
+	"bufio"
+	"bytes"
+	"errors"
+	"fmt"
+	"io"
+	"net"
+	"strconv"
+	"sync"
+	"time"
+)
+
+// conn is the low-level implementation of Conn
+type conn struct {
+
+	// Shared
+	mu      sync.Mutex
+	pending int
+	err     error
+	conn    net.Conn
+
+	// Read
+	readTimeout time.Duration
+	br          *bufio.Reader
+
+	// Write
+	writeTimeout time.Duration
+	bw           *bufio.Writer
+
+	// Scratch space for formatting argument length.
+	// '*' or '$', length, "\r\n"
+	lenScratch [32]byte
+
+	// Scratch space for formatting integers and floats.
+	numScratch [40]byte
+}
+
+// Dial connects to the Redis server at the given network and address.
+func Dial(network, address string) (Conn, error) {
+	dialer := xDialer{}
+	return dialer.Dial(network, address)
+}
+
+// DialTimeout acts like Dial but takes timeouts for establishing the
+// connection to the server, writing a command and reading a reply.
+func DialTimeout(network, address string, connectTimeout, readTimeout, writeTimeout time.Duration) (Conn, error) {
+	netDialer := net.Dialer{Timeout: connectTimeout}
+	dialer := xDialer{
+		NetDial:      netDialer.Dial,
+		ReadTimeout:  readTimeout,
+		WriteTimeout: writeTimeout,
+	}
+	return dialer.Dial(network, address)
+}
+
+// A Dialer specifies options for connecting to a Redis server.
+type xDialer struct {
+	// NetDial specifies the dial function for creating TCP connections. If
+	// NetDial is nil, then net.Dial is used.
+	NetDial func(network, addr string) (net.Conn, error)
+
+	// ReadTimeout specifies the timeout for reading a single command
+	// reply. If ReadTimeout is zero, then no timeout is used.
+	ReadTimeout time.Duration
+
+	// WriteTimeout specifies the timeout for writing a single command.  If
+	// WriteTimeout is zero, then no timeout is used.
+	WriteTimeout time.Duration
+}
+
+// Dial connects to the Redis server at address on the named network.
+func (d *xDialer) Dial(network, address string) (Conn, error) {
+	dial := d.NetDial
+	if dial == nil {
+		dial = net.Dial
+	}
+	netConn, err := dial(network, address)
+	if err != nil {
+		return nil, err
+	}
+	return &conn{
+		conn:         netConn,
+		bw:           bufio.NewWriter(netConn),
+		br:           bufio.NewReader(netConn),
+		readTimeout:  d.ReadTimeout,
+		writeTimeout: d.WriteTimeout,
+	}, nil
+}
+
+// NewConn returns a new Redigo connection for the given net connection.
+func NewConn(netConn net.Conn, readTimeout, writeTimeout time.Duration) Conn {
+	return &conn{
+		conn:         netConn,
+		bw:           bufio.NewWriter(netConn),
+		br:           bufio.NewReader(netConn),
+		readTimeout:  readTimeout,
+		writeTimeout: writeTimeout,
+	}
+}
+
+func (c *conn) Close() error {
+	c.mu.Lock()
+	err := c.err
+	if c.err == nil {
+		c.err = errors.New("redigo: closed")
+		err = c.conn.Close()
+	}
+	c.mu.Unlock()
+	return err
+}
+
+func (c *conn) fatal(err error) error {
+	c.mu.Lock()
+	if c.err == nil {
+		c.err = err
+		// Close connection to force errors on subsequent calls and to unblock
+		// other reader or writer.
+		c.conn.Close()
+	}
+	c.mu.Unlock()
+	return err
+}
+
+func (c *conn) Err() error {
+	c.mu.Lock()
+	err := c.err
+	c.mu.Unlock()
+	return err
+}
+
+func (c *conn) writeLen(prefix byte, n int) error {
+	c.lenScratch[len(c.lenScratch)-1] = '\n'
+	c.lenScratch[len(c.lenScratch)-2] = '\r'
+	i := len(c.lenScratch) - 3
+	for {
+		c.lenScratch[i] = byte('0' + n%10)
+		i -= 1
+		n = n / 10
+		if n == 0 {
+			break
+		}
+	}
+	c.lenScratch[i] = prefix
+	_, err := c.bw.Write(c.lenScratch[i:])
+	return err
+}
+
+func (c *conn) writeString(s string) error {
+	c.writeLen('$', len(s))
+	c.bw.WriteString(s)
+	_, err := c.bw.WriteString("\r\n")
+	return err
+}
+
+func (c *conn) writeBytes(p []byte) error {
+	c.writeLen('$', len(p))
+	c.bw.Write(p)
+	_, err := c.bw.WriteString("\r\n")
+	return err
+}
+
+func (c *conn) writeInt64(n int64) error {
+	return c.writeBytes(strconv.AppendInt(c.numScratch[:0], n, 10))
+}
+
+func (c *conn) writeFloat64(n float64) error {
+	return c.writeBytes(strconv.AppendFloat(c.numScratch[:0], n, 'g', -1, 64))
+}
+
+func (c *conn) writeCommand(cmd string, args []interface{}) (err error) {
+	c.writeLen('*', 1+len(args))
+	err = c.writeString(cmd)
+	for _, arg := range args {
+		if err != nil {
+			break
+		}
+		switch arg := arg.(type) {
+		case string:
+			err = c.writeString(arg)
+		case []byte:
+			err = c.writeBytes(arg)
+		case int:
+			err = c.writeInt64(int64(arg))
+		case int64:
+			err = c.writeInt64(arg)
+		case float64:
+			err = c.writeFloat64(arg)
+		case bool:
+			if arg {
+				err = c.writeString("1")
+			} else {
+				err = c.writeString("0")
+			}
+		case nil:
+			err = c.writeString("")
+		default:
+			var buf bytes.Buffer
+			fmt.Fprint(&buf, arg)
+			err = c.writeBytes(buf.Bytes())
+		}
+	}
+	return err
+}
+
+type protocolError string
+
+func (pe protocolError) Error() string {
+	return fmt.Sprintf("redigo: %s (possible server error or unsupported concurrent read by application)", string(pe))
+}
+
+func (c *conn) readLine() ([]byte, error) {
+	p, err := c.br.ReadSlice('\n')
+	if err == bufio.ErrBufferFull {
+		return nil, protocolError("long response line")
+	}
+	if err != nil {
+		return nil, err
+	}
+	i := len(p) - 2
+	if i < 0 || p[i] != '\r' {
+		return nil, protocolError("bad response line terminator")
+	}
+	return p[:i], nil
+}
+
+// parseLen parses bulk string and array lengths.
+func parseLen(p []byte) (int, error) {
+	if len(p) == 0 {
+		return -1, protocolError("malformed length")
+	}
+
+	if p[0] == '-' && len(p) == 2 && p[1] == '1' {
+		// handle $-1 and $-1 null replies.
+		return -1, nil
+	}
+
+	var n int
+	for _, b := range p {
+		n *= 10
+		if b < '0' || b > '9' {
+			return -1, protocolError("illegal bytes in length")
+		}
+		n += int(b - '0')
+	}
+
+	return n, nil
+}
+
+// parseInt parses an integer reply.
+func parseInt(p []byte) (interface{}, error) {
+	if len(p) == 0 {
+		return 0, protocolError("malformed integer")
+	}
+
+	var negate bool
+	if p[0] == '-' {
+		negate = true
+		p = p[1:]
+		if len(p) == 0 {
+			return 0, protocolError("malformed integer")
+		}
+	}
+
+	var n int64
+	for _, b := range p {
+		n *= 10
+		if b < '0' || b > '9' {
+			return 0, protocolError("illegal bytes in length")
+		}
+		n += int64(b - '0')
+	}
+
+	if negate {
+		n = -n
+	}
+	return n, nil
+}
+
+var (
+	okReply   interface{} = "OK"
+	pongReply interface{} = "PONG"
+)
+
+func (c *conn) readReply() (interface{}, error) {
+	line, err := c.readLine()
+	if err != nil {
+		return nil, err
+	}
+	if len(line) == 0 {
+		return nil, protocolError("short response line")
+	}
+	switch line[0] {
+	case '+':
+		switch {
+		case len(line) == 3 && line[1] == 'O' && line[2] == 'K':
+			// Avoid allocation for frequent "+OK" response.
+			return okReply, nil
+		case len(line) == 5 && line[1] == 'P' && line[2] == 'O' && line[3] == 'N' && line[4] == 'G':
+			// Avoid allocation in PING command benchmarks :)
+			return pongReply, nil
+		default:
+			return string(line[1:]), nil
+		}
+	case '-':
+		return Error(string(line[1:])), nil
+	case ':':
+		return parseInt(line[1:])
+	case '$':
+		n, err := parseLen(line[1:])
+		if n < 0 || err != nil {
+			return nil, err
+		}
+		p := make([]byte, n)
+		_, err = io.ReadFull(c.br, p)
+		if err != nil {
+			return nil, err
+		}
+		if line, err := c.readLine(); err != nil {
+			return nil, err
+		} else if len(line) != 0 {
+			return nil, protocolError("bad bulk string format")
+		}
+		return p, nil
+	case '*':
+		n, err := parseLen(line[1:])
+		if n < 0 || err != nil {
+			return nil, err
+		}
+		r := make([]interface{}, n)
+		for i := range r {
+			r[i], err = c.readReply()
+			if err != nil {
+				return nil, err
+			}
+		}
+		return r, nil
+	}
+	return nil, protocolError("unexpected response line")
+}
+
+func (c *conn) Send(cmd string, args ...interface{}) error {
+	c.mu.Lock()
+	c.pending += 1
+	c.mu.Unlock()
+	if c.writeTimeout != 0 {
+		c.conn.SetWriteDeadline(time.Now().Add(c.writeTimeout))
+	}
+	if err := c.writeCommand(cmd, args); err != nil {
+		return c.fatal(err)
+	}
+	return nil
+}
+
+func (c *conn) Flush() error {
+	if c.writeTimeout != 0 {
+		c.conn.SetWriteDeadline(time.Now().Add(c.writeTimeout))
+	}
+	if err := c.bw.Flush(); err != nil {
+		return c.fatal(err)
+	}
+	return nil
+}
+
+func (c *conn) Receive() (reply interface{}, err error) {
+	if c.readTimeout != 0 {
+		c.conn.SetReadDeadline(time.Now().Add(c.readTimeout))
+	}
+	if reply, err = c.readReply(); err != nil {
+		return nil, c.fatal(err)
+	}
+	// When using pub/sub, the number of receives can be greater than the
+	// number of sends. To enable normal use of the connection after
+	// unsubscribing from all channels, we do not decrement pending to a
+	// negative value.
+	//
+	// The pending field is decremented after the reply is read to handle the
+	// case where Receive is called before Send.
+	c.mu.Lock()
+	if c.pending > 0 {
+		c.pending -= 1
+	}
+	c.mu.Unlock()
+	if err, ok := reply.(Error); ok {
+		return nil, err
+	}
+	return
+}
+
+func (c *conn) Do(cmd string, args ...interface{}) (interface{}, error) {
+	c.mu.Lock()
+	pending := c.pending
+	c.pending = 0
+	c.mu.Unlock()
+
+	if cmd == "" && pending == 0 {
+		return nil, nil
+	}
+
+	if c.writeTimeout != 0 {
+		c.conn.SetWriteDeadline(time.Now().Add(c.writeTimeout))
+	}
+
+	if cmd != "" {
+		c.writeCommand(cmd, args)
+	}
+
+	if err := c.bw.Flush(); err != nil {
+		return nil, c.fatal(err)
+	}
+
+	if c.readTimeout != 0 {
+		c.conn.SetReadDeadline(time.Now().Add(c.readTimeout))
+	}
+
+	if cmd == "" {
+		reply := make([]interface{}, pending)
+		for i := range reply {
+			r, e := c.readReply()
+			if e != nil {
+				return nil, c.fatal(e)
+			}
+			reply[i] = r
+		}
+		return reply, nil
+	}
+
+	var err error
+	var reply interface{}
+	for i := 0; i <= pending; i++ {
+		var e error
+		if reply, e = c.readReply(); e != nil {
+			return nil, c.fatal(e)
+		}
+		if e, ok := reply.(Error); ok && err == nil {
+			err = e
+		}
+	}
+	return reply, err
+}

vendor/src/github.com/garyburd/redigo/redis/conn_test.go

@@ -0,0 +1,542 @@
+// Copyright 2012 Gary Burd
+//
+// Licensed under the Apache License, Version 2.0 (the "License"): you may
+// not use this file except in compliance with the License. You may obtain
+// a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+// License for the specific language governing permissions and limitations
+// under the License.
+
+package redis_test
+
+import (
+	"bufio"
+	"bytes"
+	"math"
+	"net"
+	"reflect"
+	"strings"
+	"testing"
+	"time"
+
+	"github.com/garyburd/redigo/internal/redistest"
+	"github.com/garyburd/redigo/redis"
+)
+
+var writeTests = []struct {
+	args     []interface{}
+	expected string
+}{
+	{
+		[]interface{}{"SET", "key", "value"},
+		"*3\r\n$3\r\nSET\r\n$3\r\nkey\r\n$5\r\nvalue\r\n",
+	},
+	{
+		[]interface{}{"SET", "key", "value"},
+		"*3\r\n$3\r\nSET\r\n$3\r\nkey\r\n$5\r\nvalue\r\n",
+	},
+	{
+		[]interface{}{"SET", "key", byte(100)},
+		"*3\r\n$3\r\nSET\r\n$3\r\nkey\r\n$3\r\n100\r\n",
+	},
+	{
+		[]interface{}{"SET", "key", 100},
+		"*3\r\n$3\r\nSET\r\n$3\r\nkey\r\n$3\r\n100\r\n",
+	},
+	{
+		[]interface{}{"SET", "key", int64(math.MinInt64)},
+		"*3\r\n$3\r\nSET\r\n$3\r\nkey\r\n$20\r\n-9223372036854775808\r\n",
+	},
+	{
+		[]interface{}{"SET", "key", float64(1349673917.939762)},
+		"*3\r\n$3\r\nSET\r\n$3\r\nkey\r\n$21\r\n1.349673917939762e+09\r\n",
+	},
+	{
+		[]interface{}{"SET", "key", ""},
+		"*3\r\n$3\r\nSET\r\n$3\r\nkey\r\n$0\r\n\r\n",
+	},
+	{
+		[]interface{}{"SET", "key", nil},
+		"*3\r\n$3\r\nSET\r\n$3\r\nkey\r\n$0\r\n\r\n",
+	},
+	{
+		[]interface{}{"ECHO", true, false},
+		"*3\r\n$4\r\nECHO\r\n$1\r\n1\r\n$1\r\n0\r\n",
+	},
+}
+
+func TestWrite(t *testing.T) {
+	for _, tt := range writeTests {
+		var buf bytes.Buffer
+		rw := bufio.ReadWriter{Writer: bufio.NewWriter(&buf)}
+		c := redis.NewConnBufio(rw)
+		err := c.Send(tt.args[0].(string), tt.args[1:]...)
+		if err != nil {
+			t.Errorf("Send(%v) returned error %v", tt.args, err)
+			continue
+		}
+		rw.Flush()
+		actual := buf.String()
+		if actual != tt.expected {
+			t.Errorf("Send(%v) = %q, want %q", tt.args, actual, tt.expected)
+		}
+	}
+}
+
+var errorSentinel = &struct{}{}
+
+var readTests = []struct {
+	reply    string
+	expected interface{}
+}{
+	{
+		"+OK\r\n",
+		"OK",
+	},
+	{
+		"+PONG\r\n",
+		"PONG",
+	},
+	{
+		"@OK\r\n",
+		errorSentinel,
+	},
+	{
+		"$6\r\nfoobar\r\n",
+		[]byte("foobar"),
+	},
+	{
+		"$-1\r\n",
+		nil,
+	},
+	{
+		":1\r\n",
+		int64(1),
+	},
+	{
+		":-2\r\n",
+		int64(-2),
+	},
+	{
+		"*0\r\n",
+		[]interface{}{},
+	},
+	{
+		"*-1\r\n",
+		nil,
+	},
+	{
+		"*4\r\n$3\r\nfoo\r\n$3\r\nbar\r\n$5\r\nHello\r\n$5\r\nWorld\r\n",
+		[]interface{}{[]byte("foo"), []byte("bar"), []byte("Hello"), []byte("World")},
+	},
+	{
+		"*3\r\n$3\r\nfoo\r\n$-1\r\n$3\r\nbar\r\n",
+		[]interface{}{[]byte("foo"), nil, []byte("bar")},
+	},
+
+	{
+		// "x" is not a valid length
+		"$x\r\nfoobar\r\n",
+		errorSentinel,
+	},
+	{
+		// -2 is not a valid length
+		"$-2\r\n",
+		errorSentinel,
+	},
+	{
+		// "x"  is not a valid integer
+		":x\r\n",
+		errorSentinel,
+	},
+	{
+		// missing \r\n following value
+		"$6\r\nfoobar",
+		errorSentinel,
+	},
+	{
+		// short value
+		"$6\r\nxx",
+		errorSentinel,
+	},
+	{
+		// long value
+		"$6\r\nfoobarx\r\n",
+		errorSentinel,
+	},
+}
+
+func TestRead(t *testing.T) {
+	for _, tt := range readTests {
+		rw := bufio.ReadWriter{
+			Reader: bufio.NewReader(strings.NewReader(tt.reply)),
+			Writer: bufio.NewWriter(nil), // writer need to support Flush
+		}
+		c := redis.NewConnBufio(rw)
+		actual, err := c.Receive()
+		if tt.expected == errorSentinel {
+			if err == nil {
+				t.Errorf("Receive(%q) did not return expected error", tt.reply)
+			}
+		} else {
+			if err != nil {
+				t.Errorf("Receive(%q) returned error %v", tt.reply, err)
+				continue
+			}
+			if !reflect.DeepEqual(actual, tt.expected) {
+				t.Errorf("Receive(%q) = %v, want %v", tt.reply, actual, tt.expected)
+			}
+		}
+	}
+}
+
+var testCommands = []struct {
+	args     []interface{}
+	expected interface{}
+}{
+	{
+		[]interface{}{"PING"},
+		"PONG",
+	},
+	{
+		[]interface{}{"SET", "foo", "bar"},
+		"OK",
+	},
+	{
+		[]interface{}{"GET", "foo"},
+		[]byte("bar"),
+	},
+	{
+		[]interface{}{"GET", "nokey"},
+		nil,
+	},
+	{
+		[]interface{}{"MGET", "nokey", "foo"},
+		[]interface{}{nil, []byte("bar")},
+	},
+	{
+		[]interface{}{"INCR", "mycounter"},
+		int64(1),
+	},
+	{
+		[]interface{}{"LPUSH", "mylist", "foo"},
+		int64(1),
+	},
+	{
+		[]interface{}{"LPUSH", "mylist", "bar"},
+		int64(2),
+	},
+	{
+		[]interface{}{"LRANGE", "mylist", 0, -1},
+		[]interface{}{[]byte("bar"), []byte("foo")},
+	},
+	{
+		[]interface{}{"MULTI"},
+		"OK",
+	},
+	{
+		[]interface{}{"LRANGE", "mylist", 0, -1},
+		"QUEUED",
+	},
+	{
+		[]interface{}{"PING"},
+		"QUEUED",
+	},
+	{
+		[]interface{}{"EXEC"},
+		[]interface{}{
+			[]interface{}{[]byte("bar"), []byte("foo")},
+			"PONG",
+		},
+	},
+}
+
+func TestDoCommands(t *testing.T) {
+	c, err := redistest.Dial()
+	if err != nil {
+		t.Fatalf("error connection to database, %v", err)
+	}
+	defer c.Close()
+
+	for _, cmd := range testCommands {
+		actual, err := c.Do(cmd.args[0].(string), cmd.args[1:]...)
+		if err != nil {
+			t.Errorf("Do(%v) returned error %v", cmd.args, err)
+			continue
+		}
+		if !reflect.DeepEqual(actual, cmd.expected) {
+			t.Errorf("Do(%v) = %v, want %v", cmd.args, actual, cmd.expected)
+		}
+	}
+}
+
+func TestPipelineCommands(t *testing.T) {
+	c, err := redistest.Dial()
+	if err != nil {
+		t.Fatalf("error connection to database, %v", err)
+	}
+	defer c.Close()
+
+	for _, cmd := range testCommands {
+		if err := c.Send(cmd.args[0].(string), cmd.args[1:]...); err != nil {
+			t.Fatalf("Send(%v) returned error %v", cmd.args, err)
+		}
+	}
+	if err := c.Flush(); err != nil {
+		t.Errorf("Flush() returned error %v", err)
+	}
+	for _, cmd := range testCommands {
+		actual, err := c.Receive()
+		if err != nil {
+			t.Fatalf("Receive(%v) returned error %v", cmd.args, err)
+		}
+		if !reflect.DeepEqual(actual, cmd.expected) {
+			t.Errorf("Receive(%v) = %v, want %v", cmd.args, actual, cmd.expected)
+		}
+	}
+}
+
+func TestBlankCommmand(t *testing.T) {
+	c, err := redistest.Dial()
+	if err != nil {
+		t.Fatalf("error connection to database, %v", err)
+	}
+	defer c.Close()
+
+	for _, cmd := range testCommands {
+		if err := c.Send(cmd.args[0].(string), cmd.args[1:]...); err != nil {
+			t.Fatalf("Send(%v) returned error %v", cmd.args, err)
+		}
+	}
+	reply, err := redis.Values(c.Do(""))
+	if err != nil {
+		t.Fatalf("Do() returned error %v", err)
+	}
+	if len(reply) != len(testCommands) {
+		t.Fatalf("len(reply)=%d, want %d", len(reply), len(testCommands))
+	}
+	for i, cmd := range testCommands {
+		actual := reply[i]
+		if !reflect.DeepEqual(actual, cmd.expected) {
+			t.Errorf("Receive(%v) = %v, want %v", cmd.args, actual, cmd.expected)
+		}
+	}
+}
+
+func TestRecvBeforeSend(t *testing.T) {
+	c, err := redistest.Dial()
+	if err != nil {
+		t.Fatalf("error connection to database, %v", err)
+	}
+	defer c.Close()
+	done := make(chan struct{})
+	go func() {
+		c.Receive()
+		close(done)
+	}()
+	time.Sleep(time.Millisecond)
+	c.Send("PING")
+	c.Flush()
+	<-done
+	_, err = c.Do("")
+	if err != nil {
+		t.Fatalf("error=%v", err)
+	}
+}
+
+func TestError(t *testing.T) {
+	c, err := redistest.Dial()
+	if err != nil {
+		t.Fatalf("error connection to database, %v", err)
+	}
+	defer c.Close()
+
+	c.Do("SET", "key", "val")
+	_, err = c.Do("HSET", "key", "fld", "val")
+	if err == nil {
+		t.Errorf("Expected err for HSET on string key.")
+	}
+	if c.Err() != nil {
+		t.Errorf("Conn has Err()=%v, expect nil", c.Err())
+	}
+	_, err = c.Do("SET", "key", "val")
+	if err != nil {
+		t.Errorf("Do(SET, key, val) returned error %v, expected nil.", err)
+	}
+}
+
+func TestReadDeadline(t *testing.T) {
+	l, err := net.Listen("tcp", "127.0.0.1:0")
+	if err != nil {
+		t.Fatalf("net.Listen returned %v", err)
+	}
+	defer l.Close()
+
+	go func() {
+		for {
+			c, err := l.Accept()
+			if err != nil {
+				return
+			}
+			go func() {
+				time.Sleep(time.Second)
+				c.Write([]byte("+OK\r\n"))
+				c.Close()
+			}()
+		}
+	}()
+
+	c1, err := redis.DialTimeout(l.Addr().Network(), l.Addr().String(), 0, time.Millisecond, 0)
+	if err != nil {
+		t.Fatalf("redis.Dial returned %v", err)
+	}
+	defer c1.Close()
+
+	_, err = c1.Do("PING")
+	if err == nil {
+		t.Fatalf("c1.Do() returned nil, expect error")
+	}
+	if c1.Err() == nil {
+		t.Fatalf("c1.Err() = nil, expect error")
+	}
+
+	c2, err := redis.DialTimeout(l.Addr().Network(), l.Addr().String(), 0, time.Millisecond, 0)
+	if err != nil {
+		t.Fatalf("redis.Dial returned %v", err)
+	}
+	defer c2.Close()
+
+	c2.Send("PING")
+	c2.Flush()
+	_, err = c2.Receive()
+	if err == nil {
+		t.Fatalf("c2.Receive() returned nil, expect error")
+	}
+	if c2.Err() == nil {
+		t.Fatalf("c2.Err() = nil, expect error")
+	}
+}
+
+// Connect to local instance of Redis running on the default port.
+func ExampleDial(x int) {
+	c, err := redis.Dial("tcp", ":6379")
+	if err != nil {
+		// handle error
+	}
+	defer c.Close()
+}
+
+// TextExecError tests handling of errors in a transaction. See
+// http://redis.io/topics/transactions for information on how Redis handles
+// errors in a transaction.
+func TestExecError(t *testing.T) {
+	c, err := redistest.Dial()
+	if err != nil {
+		t.Fatalf("error connection to database, %v", err)
+	}
+	defer c.Close()
+
+	// Execute commands that fail before EXEC is called.
+
+	c.Do("ZADD", "k0", 0, 0)
+	c.Send("MULTI")
+	c.Send("NOTACOMMAND", "k0", 0, 0)
+	c.Send("ZINCRBY", "k0", 0, 0)
+	v, err := c.Do("EXEC")
+	if err == nil {
+		t.Fatalf("EXEC returned values %v, expected error", v)
+	}
+
+	// Execute commands that fail after EXEC is called. The first command
+	// returns an error.
+
+	c.Do("ZADD", "k1", 0, 0)
+	c.Send("MULTI")
+	c.Send("HSET", "k1", 0, 0)
+	c.Send("ZINCRBY", "k1", 0, 0)
+	v, err = c.Do("EXEC")
+	if err != nil {
+		t.Fatalf("EXEC returned error %v", err)
+	}
+
+	vs, err := redis.Values(v, nil)
+	if err != nil {
+		t.Fatalf("Values(v) returned error %v", err)
+	}
+
+	if len(vs) != 2 {
+		t.Fatalf("len(vs) == %d, want 2", len(vs))
+	}
+
+	if _, ok := vs[0].(error); !ok {
+		t.Fatalf("first result is type %T, expected error", vs[0])
+	}
+
+	if _, ok := vs[1].([]byte); !ok {
+		t.Fatalf("second result is type %T, expected []byte", vs[2])
+	}
+
+	// Execute commands that fail after EXEC is called. The second command
+	// returns an error.
+
+	c.Do("ZADD", "k2", 0, 0)
+	c.Send("MULTI")
+	c.Send("ZINCRBY", "k2", 0, 0)
+	c.Send("HSET", "k2", 0, 0)
+	v, err = c.Do("EXEC")
+	if err != nil {
+		t.Fatalf("EXEC returned error %v", err)
+	}
+
+	vs, err = redis.Values(v, nil)
+	if err != nil {
+		t.Fatalf("Values(v) returned error %v", err)
+	}
+
+	if len(vs) != 2 {
+		t.Fatalf("len(vs) == %d, want 2", len(vs))
+	}
+
+	if _, ok := vs[0].([]byte); !ok {
+		t.Fatalf("first result is type %T, expected []byte", vs[0])
+	}
+
+	if _, ok := vs[1].(error); !ok {
+		t.Fatalf("second result is type %T, expected error", vs[2])
+	}
+}
+
+func BenchmarkDoEmpty(b *testing.B) {
+	b.StopTimer()
+	c, err := redistest.Dial()
+	if err != nil {
+		b.Fatal(err)
+	}
+	defer c.Close()
+	b.StartTimer()
+	for i := 0; i < b.N; i++ {
+		if _, err := c.Do(""); err != nil {
+			b.Fatal(err)
+		}
+	}
+}
+
+func BenchmarkDoPing(b *testing.B) {
+	b.StopTimer()
+	c, err := redistest.Dial()
+	if err != nil {
+		b.Fatal(err)
+	}
+	defer c.Close()
+	b.StartTimer()
+	for i := 0; i < b.N; i++ {
+		if _, err := c.Do("PING"); err != nil {
+			b.Fatal(err)
+		}
+	}
+}

vendor/src/github.com/garyburd/redigo/redis/doc.go

@@ -0,0 +1,169 @@
+// Copyright 2012 Gary Burd
+//
+// Licensed under the Apache License, Version 2.0 (the "License"): you may
+// not use this file except in compliance with the License. You may obtain
+// a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+// License for the specific language governing permissions and limitations
+// under the License.
+
+// Package redis is a client for the Redis database.
+//
+// The Redigo FAQ (https://github.com/garyburd/redigo/wiki/FAQ) contains more
+// documentation about this package.
+//
+// Connections
+//
+// The Conn interface is the primary interface for working with Redis.
+// Applications create connections by calling the Dial, DialWithTimeout or
+// NewConn functions. In the future, functions will be added for creating
+// sharded and other types of connections.
+//
+// The application must call the connection Close method when the application
+// is done with the connection.
+//
+// Executing Commands
+//
+// The Conn interface has a generic method for executing Redis commands:
+//
+//  Do(commandName string, args ...interface{}) (reply interface{}, err error)
+//
+// The Redis command reference (http://redis.io/commands) lists the available
+// commands. An example of using the Redis APPEND command is:
+//
+//  n, err := conn.Do("APPEND", "key", "value")
+//
+// The Do method converts command arguments to binary strings for transmission
+// to the server as follows:
+//
+//  Go Type                 Conversion
+//  []byte                  Sent as is
+//  string                  Sent as is
+//  int, int64              strconv.FormatInt(v)
+//  float64                 strconv.FormatFloat(v, 'g', -1, 64)
+//  bool                    true -> "1", false -> "0"
+//  nil                     ""
+//  all other types         fmt.Print(v)
+//
+// Redis command reply types are represented using the following Go types:
+//
+//  Redis type              Go type
+//  error                   redis.Error
+//  integer                 int64
+//  simple string           string
+//  bulk string             []byte or nil if value not present.
+//  array                   []interface{} or nil if value not present.
+//
+// Use type assertions or the reply helper functions to convert from
+// interface{} to the specific Go type for the command result.
+//
+// Pipelining
+//
+// Connections support pipelining using the Send, Flush and Receive methods.
+//
+//  Send(commandName string, args ...interface{}) error
+//  Flush() error
+//  Receive() (reply interface{}, err error)
+//
+// Send writes the command to the connection's output buffer. Flush flushes the
+// connection's output buffer to the server. Receive reads a single reply from
+// the server. The following example shows a simple pipeline.
+//
+//  c.Send("SET", "foo", "bar")
+//  c.Send("GET", "foo")
+//  c.Flush()
+//  c.Receive() // reply from SET
+//  v, err = c.Receive() // reply from GET
+//
+// The Do method combines the functionality of the Send, Flush and Receive
+// methods. The Do method starts by writing the command and flushing the output
+// buffer. Next, the Do method receives all pending replies including the reply
+// for the command just sent by Do. If any of the received replies is an error,
+// then Do returns the error. If there are no errors, then Do returns the last
+// reply. If the command argument to the Do method is "", then the Do method
+// will flush the output buffer and receive pending replies without sending a
+// command.
+//
+// Use the Send and Do methods to implement pipelined transactions.
+//
+//  c.Send("MULTI")
+//  c.Send("INCR", "foo")
+//  c.Send("INCR", "bar")
+//  r, err := c.Do("EXEC")
+//  fmt.Println(r) // prints [1, 1]
+//
+// Concurrency
+//
+// Connections do not support concurrent calls to the write methods (Send,
+// Flush) or concurrent calls to the read method (Receive). Connections do
+// allow a concurrent reader and writer.
+//
+// Because the Do method combines the functionality of Send, Flush and Receive,
+// the Do method cannot be called concurrently with the other methods.
+//
+// For full concurrent access to Redis, use the thread-safe Pool to get and
+// release connections from within a goroutine.
+//
+// Publish and Subscribe
+//
+// Use the Send, Flush and Receive methods to implement Pub/Sub subscribers.
+//
+//  c.Send("SUBSCRIBE", "example")
+//  c.Flush()
+//  for {
+//      reply, err := c.Receive()
+//      if err != nil {
+//          return err
+//      }
+//      // process pushed message
+//  }
+//
+// The PubSubConn type wraps a Conn with convenience methods for implementing
+// subscribers. The Subscribe, PSubscribe, Unsubscribe and PUnsubscribe methods
+// send and flush a subscription management command. The receive method
+// converts a pushed message to convenient types for use in a type switch.
+//
+//  psc := redis.PubSubConn{c}
+//  psc.Subscribe("example")
+//  for {
+//      switch v := psc.Receive().(type) {
+//      case redis.Message:
+//          fmt.Printf("%s: message: %s\n", v.Channel, v.Data)
+//      case redis.Subscription:
+//          fmt.Printf("%s: %s %d\n", v.Channel, v.Kind, v.Count)
+//      case error:
+//          return v
+//      }
+//  }
+//
+// Reply Helpers
+//
+// The Bool, Int, Bytes, String, Strings and Values functions convert a reply
+// to a value of a specific type. To allow convenient wrapping of calls to the
+// connection Do and Receive methods, the functions take a second argument of
+// type error.  If the error is non-nil, then the helper function returns the
+// error. If the error is nil, the function converts the reply to the specified
+// type:
+//
+//  exists, err := redis.Bool(c.Do("EXISTS", "foo"))
+//  if err != nil {
+//      // handle error return from c.Do or type conversion error.
+//  }
+//
+// The Scan function converts elements of a array reply to Go types:
+//
+//  var value1 int
+//  var value2 string
+//  reply, err := redis.Values(c.Do("MGET", "key1", "key2"))
+//  if err != nil {
+//      // handle error
+//  }
+//   if _, err := redis.Scan(reply, &value1, &value2); err != nil {
+//      // handle error
+//  }
+package redis // import "github.com/garyburd/redigo/redis"

vendor/src/github.com/garyburd/redigo/redis/log.go

@@ -0,0 +1,117 @@
+// Copyright 2012 Gary Burd
+//
+// Licensed under the Apache License, Version 2.0 (the "License"): you may
+// not use this file except in compliance with the License. You may obtain
+// a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+// License for the specific language governing permissions and limitations
+// under the License.
+
+package redis
+
+import (
+	"bytes"
+	"fmt"
+	"log"
+)
+
+// NewLoggingConn returns a logging wrapper around a connection.
+func NewLoggingConn(conn Conn, logger *log.Logger, prefix string) Conn {
+	if prefix != "" {
+		prefix = prefix + "."
+	}
+	return &loggingConn{conn, logger, prefix}
+}
+
+type loggingConn struct {
+	Conn
+	logger *log.Logger
+	prefix string
+}
+
+func (c *loggingConn) Close() error {
+	err := c.Conn.Close()
+	var buf bytes.Buffer
+	fmt.Fprintf(&buf, "%sClose() -> (%v)", c.prefix, err)
+	c.logger.Output(2, buf.String())
+	return err
+}
+
+func (c *loggingConn) printValue(buf *bytes.Buffer, v interface{}) {
+	const chop = 32
+	switch v := v.(type) {
+	case []byte:
+		if len(v) > chop {
+			fmt.Fprintf(buf, "%q...", v[:chop])
+		} else {
+			fmt.Fprintf(buf, "%q", v)
+		}
+	case string:
+		if len(v) > chop {
+			fmt.Fprintf(buf, "%q...", v[:chop])
+		} else {
+			fmt.Fprintf(buf, "%q", v)
+		}
+	case []interface{}:
+		if len(v) == 0 {
+			buf.WriteString("[]")
+		} else {
+			sep := "["
+			fin := "]"
+			if len(v) > chop {
+				v = v[:chop]
+				fin = "...]"
+			}
+			for _, vv := range v {
+				buf.WriteString(sep)
+				c.printValue(buf, vv)
+				sep = ", "
+			}
+			buf.WriteString(fin)
+		}
+	default:
+		fmt.Fprint(buf, v)
+	}
+}
+
+func (c *loggingConn) print(method, commandName string, args []interface{}, reply interface{}, err error) {
+	var buf bytes.Buffer
+	fmt.Fprintf(&buf, "%s%s(", c.prefix, method)
+	if method != "Receive" {
+		buf.WriteString(commandName)
+		for _, arg := range args {
+			buf.WriteString(", ")
+			c.printValue(&buf, arg)
+		}
+	}
+	buf.WriteString(") -> (")
+	if method != "Send" {
+		c.printValue(&buf, reply)
+		buf.WriteString(", ")
+	}
+	fmt.Fprintf(&buf, "%v)", err)
+	c.logger.Output(3, buf.String())
+}
+
+func (c *loggingConn) Do(commandName string, args ...interface{}) (interface{}, error) {
+	reply, err := c.Conn.Do(commandName, args...)
+	c.print("Do", commandName, args, reply, err)
+	return reply, err
+}
+
+func (c *loggingConn) Send(commandName string, args ...interface{}) error {
+	err := c.Conn.Send(commandName, args...)
+	c.print("Send", commandName, args, nil, err)
+	return err
+}
+
+func (c *loggingConn) Receive() (interface{}, error) {
+	reply, err := c.Conn.Receive()
+	c.print("Receive", "", nil, reply, err)
+	return reply, err
+}

vendor/src/github.com/garyburd/redigo/redis/pool.go

@@ -0,0 +1,389 @@
+// Copyright 2012 Gary Burd
+//
+// Licensed under the Apache License, Version 2.0 (the "License"): you may
+// not use this file except in compliance with the License. You may obtain
+// a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+// License for the specific language governing permissions and limitations
+// under the License.
+
+package redis
+
+import (
+	"bytes"
+	"container/list"
+	"crypto/rand"
+	"crypto/sha1"
+	"errors"
+	"io"
+	"strconv"
+	"sync"
+	"time"
+
+	"github.com/garyburd/redigo/internal"
+)
+
+var nowFunc = time.Now // for testing
+
+// ErrPoolExhausted is returned from a pool connection method (Do, Send,
+// Receive, Flush, Err) when the maximum number of database connections in the
+// pool has been reached.
+var ErrPoolExhausted = errors.New("redigo: connection pool exhausted")
+
+var (
+	errPoolClosed = errors.New("redigo: connection pool closed")
+	errConnClosed = errors.New("redigo: connection closed")
+)
+
+// Pool maintains a pool of connections. The application calls the Get method
+// to get a connection from the pool and the connection's Close method to
+// return the connection's resources to the pool.
+//
+// The following example shows how to use a pool in a web application. The
+// application creates a pool at application startup and makes it available to
+// request handlers using a global variable.
+//
+//  func newPool(server, password string) *redis.Pool {
+//      return &redis.Pool{
+//          MaxIdle: 3,
+//          IdleTimeout: 240 * time.Second,
+//          Dial: func () (redis.Conn, error) {
+//              c, err := redis.Dial("tcp", server)
+//              if err != nil {
+//                  return nil, err
+//              }
+//              if _, err := c.Do("AUTH", password); err != nil {
+//                  c.Close()
+//                  return nil, err
+//              }
+//              return c, err
+//          },
+//          TestOnBorrow: func(c redis.Conn, t time.Time) error {
+//              _, err := c.Do("PING")
+//              return err
+//          },
+//      }
+//  }
+//
+//  var (
+//      pool *redis.Pool
+//      redisServer = flag.String("redisServer", ":6379", "")
+//      redisPassword = flag.String("redisPassword", "", "")
+//  )
+//
+//  func main() {
+//      flag.Parse()
+//      pool = newPool(*redisServer, *redisPassword)
+//      ...
+//  }
+//
+// A request handler gets a connection from the pool and closes the connection
+// when the handler is done:
+//
+//  func serveHome(w http.ResponseWriter, r *http.Request) {
+//      conn := pool.Get()
+//      defer conn.Close()
+//      ....
+//  }
+//
+type Pool struct {
+
+	// Dial is an application supplied function for creating and configuring a
+	// connection
+	Dial func() (Conn, error)
+
+	// TestOnBorrow is an optional application supplied function for checking
+	// the health of an idle connection before the connection is used again by
+	// the application. Argument t is the time that the connection was returned
+	// to the pool. If the function returns an error, then the connection is
+	// closed.
+	TestOnBorrow func(c Conn, t time.Time) error
+
+	// Maximum number of idle connections in the pool.
+	MaxIdle int
+
+	// Maximum number of connections allocated by the pool at a given time.
+	// When zero, there is no limit on the number of connections in the pool.
+	MaxActive int
+
+	// Close connections after remaining idle for this duration. If the value
+	// is zero, then idle connections are not closed. Applications should set
+	// the timeout to a value less than the server's timeout.
+	IdleTimeout time.Duration
+
+	// If Wait is true and the pool is at the MaxIdle limit, then Get() waits
+	// for a connection to be returned to the pool before returning.
+	Wait bool
+
+	// mu protects fields defined below.
+	mu     sync.Mutex
+	cond   *sync.Cond
+	closed bool
+	active int
+
+	// Stack of idleConn with most recently used at the front.
+	idle list.List
+}
+
+type idleConn struct {
+	c Conn
+	t time.Time
+}
+
+// NewPool creates a new pool. This function is deprecated. Applications should
+// initialize the Pool fields directly as shown in example.
+func NewPool(newFn func() (Conn, error), maxIdle int) *Pool {
+	return &Pool{Dial: newFn, MaxIdle: maxIdle}
+}
+
+// Get gets a connection. The application must close the returned connection.
+// This method always returns a valid connection so that applications can defer
+// error handling to the first use of the connection. If there is an error
+// getting an underlying connection, then the connection Err, Do, Send, Flush
+// and Receive methods return that error.
+func (p *Pool) Get() Conn {
+	c, err := p.get()
+	if err != nil {
+		return errorConnection{err}
+	}
+	return &pooledConnection{p: p, c: c}
+}
+
+// ActiveCount returns the number of active connections in the pool.
+func (p *Pool) ActiveCount() int {
+	p.mu.Lock()
+	active := p.active
+	p.mu.Unlock()
+	return active
+}
+
+// Close releases the resources used by the pool.
+func (p *Pool) Close() error {
+	p.mu.Lock()
+	idle := p.idle
+	p.idle.Init()
+	p.closed = true
+	p.active -= idle.Len()
+	if p.cond != nil {
+		p.cond.Broadcast()
+	}
+	p.mu.Unlock()
+	for e := idle.Front(); e != nil; e = e.Next() {
+		e.Value.(idleConn).c.Close()
+	}
+	return nil
+}
+
+// release decrements the active count and signals waiters. The caller must
+// hold p.mu during the call.
+func (p *Pool) release() {
+	p.active -= 1
+	if p.cond != nil {
+		p.cond.Signal()
+	}
+}
+
+// get prunes stale connections and returns a connection from the idle list or
+// creates a new connection.
+func (p *Pool) get() (Conn, error) {
+	p.mu.Lock()
+
+	// Prune stale connections.
+
+	if timeout := p.IdleTimeout; timeout > 0 {
+		for i, n := 0, p.idle.Len(); i < n; i++ {
+			e := p.idle.Back()
+			if e == nil {
+				break
+			}
+			ic := e.Value.(idleConn)
+			if ic.t.Add(timeout).After(nowFunc()) {
+				break
+			}
+			p.idle.Remove(e)
+			p.release()
+			p.mu.Unlock()
+			ic.c.Close()
+			p.mu.Lock()
+		}
+	}
+
+	for {
+
+		// Get idle connection.
+
+		for i, n := 0, p.idle.Len(); i < n; i++ {
+			e := p.idle.Front()
+			if e == nil {
+				break
+			}
+			ic := e.Value.(idleConn)
+			p.idle.Remove(e)
+			test := p.TestOnBorrow
+			p.mu.Unlock()
+			if test == nil || test(ic.c, ic.t) == nil {
+				return ic.c, nil
+			}
+			ic.c.Close()
+			p.mu.Lock()
+			p.release()
+		}
+
+		// Check for pool closed before dialing a new connection.
+
+		if p.closed {
+			p.mu.Unlock()
+			return nil, errors.New("redigo: get on closed pool")
+		}
+
+		// Dial new connection if under limit.
+
+		if p.MaxActive == 0 || p.active < p.MaxActive {
+			dial := p.Dial
+			p.active += 1
+			p.mu.Unlock()
+			c, err := dial()
+			if err != nil {
+				p.mu.Lock()
+				p.release()
+				p.mu.Unlock()
+				c = nil
+			}
+			return c, err
+		}
+
+		if !p.Wait {
+			p.mu.Unlock()
+			return nil, ErrPoolExhausted
+		}
+
+		if p.cond == nil {
+			p.cond = sync.NewCond(&p.mu)
+		}
+		p.cond.Wait()
+	}
+}
+
+func (p *Pool) put(c Conn, forceClose bool) error {
+	err := c.Err()
+	p.mu.Lock()
+	if !p.closed && err == nil && !forceClose {
+		p.idle.PushFront(idleConn{t: nowFunc(), c: c})
+		if p.idle.Len() > p.MaxIdle {
+			c = p.idle.Remove(p.idle.Back()).(idleConn).c
+		} else {
+			c = nil
+		}
+	}
+
+	if c == nil {
+		if p.cond != nil {
+			p.cond.Signal()
+		}
+		p.mu.Unlock()
+		return nil
+	}
+
+	p.release()
+	p.mu.Unlock()
+	return c.Close()
+}
+
+type pooledConnection struct {
+	p     *Pool
+	c     Conn
+	state int
+}
+
+var (
+	sentinel     []byte
+	sentinelOnce sync.Once
+)
+
+func initSentinel() {
+	p := make([]byte, 64)
+	if _, err := rand.Read(p); err == nil {
+		sentinel = p
+	} else {
+		h := sha1.New()
+		io.WriteString(h, "Oops, rand failed. Use time instead.")
+		io.WriteString(h, strconv.FormatInt(time.Now().UnixNano(), 10))
+		sentinel = h.Sum(nil)
+	}
+}
+
+func (pc *pooledConnection) Close() error {
+	c := pc.c
+	if _, ok := c.(errorConnection); ok {
+		return nil
+	}
+	pc.c = errorConnection{errConnClosed}
+
+	if pc.state&internal.MultiState != 0 {
+		c.Send("DISCARD")
+		pc.state &^= (internal.MultiState | internal.WatchState)
+	} else if pc.state&internal.WatchState != 0 {
+		c.Send("UNWATCH")
+		pc.state &^= internal.WatchState
+	}
+	if pc.state&internal.SubscribeState != 0 {
+		c.Send("UNSUBSCRIBE")
+		c.Send("PUNSUBSCRIBE")
+		// To detect the end of the message stream, ask the server to echo
+		// a sentinel value and read until we see that value.
+		sentinelOnce.Do(initSentinel)
+		c.Send("ECHO", sentinel)
+		c.Flush()
+		for {
+			p, err := c.Receive()
+			if err != nil {
+				break
+			}
+			if p, ok := p.([]byte); ok && bytes.Equal(p, sentinel) {
+				pc.state &^= internal.SubscribeState
+				break
+			}
+		}
+	}
+	c.Do("")
+	pc.p.put(c, pc.state != 0)
+	return nil
+}
+
+func (pc *pooledConnection) Err() error {
+	return pc.c.Err()
+}
+
+func (pc *pooledConnection) Do(commandName string, args ...interface{}) (reply interface{}, err error) {
+	ci := internal.LookupCommandInfo(commandName)
+	pc.state = (pc.state | ci.Set) &^ ci.Clear
+	return pc.c.Do(commandName, args...)
+}
+
+func (pc *pooledConnection) Send(commandName string, args ...interface{}) error {
+	ci := internal.LookupCommandInfo(commandName)
+	pc.state = (pc.state | ci.Set) &^ ci.Clear
+	return pc.c.Send(commandName, args...)
+}
+
+func (pc *pooledConnection) Flush() error {
+	return pc.c.Flush()
+}
+
+func (pc *pooledConnection) Receive() (reply interface{}, err error) {
+	return pc.c.Receive()
+}
+
+type errorConnection struct{ err error }
+
+func (ec errorConnection) Do(string, ...interface{}) (interface{}, error) { return nil, ec.err }
+func (ec errorConnection) Send(string, ...interface{}) error              { return ec.err }
+func (ec errorConnection) Err() error                                     { return ec.err }
+func (ec errorConnection) Close() error                                   { return ec.err }
+func (ec errorConnection) Flush() error                                   { return ec.err }
+func (ec errorConnection) Receive() (interface{}, error)                  { return nil, ec.err }

vendor/src/github.com/garyburd/redigo/redis/pool_test.go

@@ -0,0 +1,674 @@
+// Copyright 2011 Gary Burd
+//
+// Licensed under the Apache License, Version 2.0 (the "License"): you may
+// not use this file except in compliance with the License. You may obtain
+// a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+// License for the specific language governing permissions and limitations
+// under the License.
+
+package redis_test
+
+import (
+	"errors"
+	"io"
+	"reflect"
+	"sync"
+	"testing"
+	"time"
+
+	"github.com/garyburd/redigo/internal/redistest"
+	"github.com/garyburd/redigo/redis"
+)
+
+type poolTestConn struct {
+	d   *poolDialer
+	err error
+	redis.Conn
+}
+
+func (c *poolTestConn) Close() error { c.d.open -= 1; return nil }
+func (c *poolTestConn) Err() error   { return c.err }
+
+func (c *poolTestConn) Do(commandName string, args ...interface{}) (reply interface{}, err error) {
+	if commandName == "ERR" {
+		c.err = args[0].(error)
+		commandName = "PING"
+	}
+	if commandName != "" {
+		c.d.commands = append(c.d.commands, commandName)
+	}
+	return c.Conn.Do(commandName, args...)
+}
+
+func (c *poolTestConn) Send(commandName string, args ...interface{}) error {
+	c.d.commands = append(c.d.commands, commandName)
+	return c.Conn.Send(commandName, args...)
+}
+
+type poolDialer struct {
+	t        *testing.T
+	dialed   int
+	open     int
+	commands []string
+	dialErr  error
+}
+
+func (d *poolDialer) dial() (redis.Conn, error) {
+	d.dialed += 1
+	if d.dialErr != nil {
+		return nil, d.dialErr
+	}
+	c, err := redistest.Dial()
+	if err != nil {
+		return nil, err
+	}
+	d.open += 1
+	return &poolTestConn{d: d, Conn: c}, nil
+}
+
+func (d *poolDialer) check(message string, p *redis.Pool, dialed, open int) {
+	if d.dialed != dialed {
+		d.t.Errorf("%s: dialed=%d, want %d", message, d.dialed, dialed)
+	}
+	if d.open != open {
+		d.t.Errorf("%s: open=%d, want %d", message, d.open, open)
+	}
+	if active := p.ActiveCount(); active != open {
+		d.t.Errorf("%s: active=%d, want %d", message, active, open)
+	}
+}
+
+func TestPoolReuse(t *testing.T) {
+	d := poolDialer{t: t}
+	p := &redis.Pool{
+		MaxIdle: 2,
+		Dial:    d.dial,
+	}
+
+	for i := 0; i < 10; i++ {
+		c1 := p.Get()
+		c1.Do("PING")
+		c2 := p.Get()
+		c2.Do("PING")
+		c1.Close()
+		c2.Close()
+	}
+
+	d.check("before close", p, 2, 2)
+	p.Close()
+	d.check("after close", p, 2, 0)
+}
+
+func TestPoolMaxIdle(t *testing.T) {
+	d := poolDialer{t: t}
+	p := &redis.Pool{
+		MaxIdle: 2,
+		Dial:    d.dial,
+	}
+	for i := 0; i < 10; i++ {
+		c1 := p.Get()
+		c1.Do("PING")
+		c2 := p.Get()
+		c2.Do("PING")
+		c3 := p.Get()
+		c3.Do("PING")
+		c1.Close()
+		c2.Close()
+		c3.Close()
+	}
+	d.check("before close", p, 12, 2)
+	p.Close()
+	d.check("after close", p, 12, 0)
+}
+
+func TestPoolError(t *testing.T) {
+	d := poolDialer{t: t}
+	p := &redis.Pool{
+		MaxIdle: 2,
+		Dial:    d.dial,
+	}
+
+	c := p.Get()
+	c.Do("ERR", io.EOF)
+	if c.Err() == nil {
+		t.Errorf("expected c.Err() != nil")
+	}
+	c.Close()
+
+	c = p.Get()
+	c.Do("ERR", io.EOF)
+	c.Close()
+
+	d.check(".", p, 2, 0)
+}
+
+func TestPoolClose(t *testing.T) {
+	d := poolDialer{t: t}
+	p := &redis.Pool{
+		MaxIdle: 2,
+		Dial:    d.dial,
+	}
+
+	c1 := p.Get()
+	c1.Do("PING")
+	c2 := p.Get()
+	c2.Do("PING")
+	c3 := p.Get()
+	c3.Do("PING")
+
+	c1.Close()
+	if _, err := c1.Do("PING"); err == nil {
+		t.Errorf("expected error after connection closed")
+	}
+
+	c2.Close()
+	c2.Close()
+
+	p.Close()
+
+	d.check("after pool close", p, 3, 1)
+
+	if _, err := c1.Do("PING"); err == nil {
+		t.Errorf("expected error after connection and pool closed")
+	}
+
+	c3.Close()
+
+	d.check("after conn close", p, 3, 0)
+
+	c1 = p.Get()
+	if _, err := c1.Do("PING"); err == nil {
+		t.Errorf("expected error after pool closed")
+	}
+}
+
+func TestPoolTimeout(t *testing.T) {
+	d := poolDialer{t: t}
+	p := &redis.Pool{
+		MaxIdle:     2,
+		IdleTimeout: 300 * time.Second,
+		Dial:        d.dial,
+	}
+
+	now := time.Now()
+	redis.SetNowFunc(func() time.Time { return now })
+	defer redis.SetNowFunc(time.Now)
+
+	c := p.Get()
+	c.Do("PING")
+	c.Close()
+
+	d.check("1", p, 1, 1)
+
+	now = now.Add(p.IdleTimeout)
+
+	c = p.Get()
+	c.Do("PING")
+	c.Close()
+
+	d.check("2", p, 2, 1)
+
+	p.Close()
+}
+
+func TestPoolConcurrenSendReceive(t *testing.T) {
+	p := &redis.Pool{
+		Dial: redistest.Dial,
+	}
+	c := p.Get()
+	done := make(chan error, 1)
+	go func() {
+		_, err := c.Receive()
+		done <- err
+	}()
+	c.Send("PING")
+	c.Flush()
+	err := <-done
+	if err != nil {
+		t.Fatalf("Receive() returned error %v", err)
+	}
+	_, err = c.Do("")
+	if err != nil {
+		t.Fatalf("Do() returned error %v", err)
+	}
+	c.Close()
+	p.Close()
+}
+
+func TestPoolBorrowCheck(t *testing.T) {
+	d := poolDialer{t: t}
+	p := &redis.Pool{
+		MaxIdle:      2,
+		Dial:         d.dial,
+		TestOnBorrow: func(redis.Conn, time.Time) error { return redis.Error("BLAH") },
+	}
+
+	for i := 0; i < 10; i++ {
+		c := p.Get()
+		c.Do("PING")
+		c.Close()
+	}
+	d.check("1", p, 10, 1)
+	p.Close()
+}
+
+func TestPoolMaxActive(t *testing.T) {
+	d := poolDialer{t: t}
+	p := &redis.Pool{
+		MaxIdle:   2,
+		MaxActive: 2,
+		Dial:      d.dial,
+	}
+	c1 := p.Get()
+	c1.Do("PING")
+	c2 := p.Get()
+	c2.Do("PING")
+
+	d.check("1", p, 2, 2)
+
+	c3 := p.Get()
+	if _, err := c3.Do("PING"); err != redis.ErrPoolExhausted {
+		t.Errorf("expected pool exhausted")
+	}
+
+	c3.Close()
+	d.check("2", p, 2, 2)
+	c2.Close()
+	d.check("3", p, 2, 2)
+
+	c3 = p.Get()
+	if _, err := c3.Do("PING"); err != nil {
+		t.Errorf("expected good channel, err=%v", err)
+	}
+	c3.Close()
+
+	d.check("4", p, 2, 2)
+	p.Close()
+}
+
+func TestPoolMonitorCleanup(t *testing.T) {
+	d := poolDialer{t: t}
+	p := &redis.Pool{
+		MaxIdle:   2,
+		MaxActive: 2,
+		Dial:      d.dial,
+	}
+	c := p.Get()
+	c.Send("MONITOR")
+	c.Close()
+
+	d.check("", p, 1, 0)
+	p.Close()
+}
+
+func TestPoolPubSubCleanup(t *testing.T) {
+	d := poolDialer{t: t}
+	p := &redis.Pool{
+		MaxIdle:   2,
+		MaxActive: 2,
+		Dial:      d.dial,
+	}
+
+	c := p.Get()
+	c.Send("SUBSCRIBE", "x")
+	c.Close()
+
+	want := []string{"SUBSCRIBE", "UNSUBSCRIBE", "PUNSUBSCRIBE", "ECHO"}
+	if !reflect.DeepEqual(d.commands, want) {
+		t.Errorf("got commands %v, want %v", d.commands, want)
+	}
+	d.commands = nil
+
+	c = p.Get()
+	c.Send("PSUBSCRIBE", "x*")
+	c.Close()
+
+	want = []string{"PSUBSCRIBE", "UNSUBSCRIBE", "PUNSUBSCRIBE", "ECHO"}
+	if !reflect.DeepEqual(d.commands, want) {
+		t.Errorf("got commands %v, want %v", d.commands, want)
+	}
+	d.commands = nil
+
+	p.Close()
+}
+
+func TestPoolTransactionCleanup(t *testing.T) {
+	d := poolDialer{t: t}
+	p := &redis.Pool{
+		MaxIdle:   2,
+		MaxActive: 2,
+		Dial:      d.dial,
+	}
+
+	c := p.Get()
+	c.Do("WATCH", "key")
+	c.Do("PING")
+	c.Close()
+
+	want := []string{"WATCH", "PING", "UNWATCH"}
+	if !reflect.DeepEqual(d.commands, want) {
+		t.Errorf("got commands %v, want %v", d.commands, want)
+	}
+	d.commands = nil
+
+	c = p.Get()
+	c.Do("WATCH", "key")
+	c.Do("UNWATCH")
+	c.Do("PING")
+	c.Close()
+
+	want = []string{"WATCH", "UNWATCH", "PING"}
+	if !reflect.DeepEqual(d.commands, want) {
+		t.Errorf("got commands %v, want %v", d.commands, want)
+	}
+	d.commands = nil
+
+	c = p.Get()
+	c.Do("WATCH", "key")
+	c.Do("MULTI")
+	c.Do("PING")
+	c.Close()
+
+	want = []string{"WATCH", "MULTI", "PING", "DISCARD"}
+	if !reflect.DeepEqual(d.commands, want) {
+		t.Errorf("got commands %v, want %v", d.commands, want)
+	}
+	d.commands = nil
+
+	c = p.Get()
+	c.Do("WATCH", "key")
+	c.Do("MULTI")
+	c.Do("DISCARD")
+	c.Do("PING")
+	c.Close()
+
+	want = []string{"WATCH", "MULTI", "DISCARD", "PING"}
+	if !reflect.DeepEqual(d.commands, want) {
+		t.Errorf("got commands %v, want %v", d.commands, want)
+	}
+	d.commands = nil
+
+	c = p.Get()
+	c.Do("WATCH", "key")
+	c.Do("MULTI")
+	c.Do("EXEC")
+	c.Do("PING")
+	c.Close()
+
+	want = []string{"WATCH", "MULTI", "EXEC", "PING"}
+	if !reflect.DeepEqual(d.commands, want) {
+		t.Errorf("got commands %v, want %v", d.commands, want)
+	}
+	d.commands = nil
+
+	p.Close()
+}
+
+func startGoroutines(p *redis.Pool, cmd string, args ...interface{}) chan error {
+	errs := make(chan error, 10)
+	for i := 0; i < cap(errs); i++ {
+		go func() {
+			c := p.Get()
+			_, err := c.Do(cmd, args...)
+			errs <- err
+			c.Close()
+		}()
+	}
+
+	// Wait for goroutines to block.
+	time.Sleep(time.Second / 4)
+
+	return errs
+}
+
+func TestWaitPool(t *testing.T) {
+	d := poolDialer{t: t}
+	p := &redis.Pool{
+		MaxIdle:   1,
+		MaxActive: 1,
+		Dial:      d.dial,
+		Wait:      true,
+	}
+	defer p.Close()
+	c := p.Get()
+	errs := startGoroutines(p, "PING")
+	d.check("before close", p, 1, 1)
+	c.Close()
+	timeout := time.After(2 * time.Second)
+	for i := 0; i < cap(errs); i++ {
+		select {
+		case err := <-errs:
+			if err != nil {
+				t.Fatal(err)
+			}
+		case <-timeout:
+			t.Fatalf("timeout waiting for blocked goroutine %d", i)
+		}
+	}
+	d.check("done", p, 1, 1)
+}
+
+func TestWaitPoolClose(t *testing.T) {
+	d := poolDialer{t: t}
+	p := &redis.Pool{
+		MaxIdle:   1,
+		MaxActive: 1,
+		Dial:      d.dial,
+		Wait:      true,
+	}
+	c := p.Get()
+	if _, err := c.Do("PING"); err != nil {
+		t.Fatal(err)
+	}
+	errs := startGoroutines(p, "PING")
+	d.check("before close", p, 1, 1)
+	p.Close()
+	timeout := time.After(2 * time.Second)
+	for i := 0; i < cap(errs); i++ {
+		select {
+		case err := <-errs:
+			switch err {
+			case nil:
+				t.Fatal("blocked goroutine did not get error")
+			case redis.ErrPoolExhausted:
+				t.Fatal("blocked goroutine got pool exhausted error")
+			}
+		case <-timeout:
+			t.Fatal("timeout waiting for blocked goroutine")
+		}
+	}
+	c.Close()
+	d.check("done", p, 1, 0)
+}
+
+func TestWaitPoolCommandError(t *testing.T) {
+	testErr := errors.New("test")
+	d := poolDialer{t: t}
+	p := &redis.Pool{
+		MaxIdle:   1,
+		MaxActive: 1,
+		Dial:      d.dial,
+		Wait:      true,
+	}
+	defer p.Close()
+	c := p.Get()
+	errs := startGoroutines(p, "ERR", testErr)
+	d.check("before close", p, 1, 1)
+	c.Close()
+	timeout := time.After(2 * time.Second)
+	for i := 0; i < cap(errs); i++ {
+		select {
+		case err := <-errs:
+			if err != nil {
+				t.Fatal(err)
+			}
+		case <-timeout:
+			t.Fatalf("timeout waiting for blocked goroutine %d", i)
+		}
+	}
+	d.check("done", p, cap(errs), 0)
+}
+
+func TestWaitPoolDialError(t *testing.T) {
+	testErr := errors.New("test")
+	d := poolDialer{t: t}
+	p := &redis.Pool{
+		MaxIdle:   1,
+		MaxActive: 1,
+		Dial:      d.dial,
+		Wait:      true,
+	}
+	defer p.Close()
+	c := p.Get()
+	errs := startGoroutines(p, "ERR", testErr)
+	d.check("before close", p, 1, 1)
+
+	d.dialErr = errors.New("dial")
+	c.Close()
+
+	nilCount := 0
+	errCount := 0
+	timeout := time.After(2 * time.Second)
+	for i := 0; i < cap(errs); i++ {
+		select {
+		case err := <-errs:
+			switch err {
+			case nil:
+				nilCount++
+			case d.dialErr:
+				errCount++
+			default:
+				t.Fatalf("expected dial error or nil, got %v", err)
+			}
+		case <-timeout:
+			t.Fatalf("timeout waiting for blocked goroutine %d", i)
+		}
+	}
+	if nilCount != 1 {
+		t.Errorf("expected one nil error, got %d", nilCount)
+	}
+	if errCount != cap(errs)-1 {
+		t.Errorf("expected %d dial erors, got %d", cap(errs)-1, errCount)
+	}
+	d.check("done", p, cap(errs), 0)
+}
+
+// Borrowing requires us to iterate over the idle connections, unlock the pool,
+// and perform a blocking operation to check the connection still works. If
+// TestOnBorrow fails, we must reacquire the lock and continue iteration. This
+// test ensures that iteration will work correctly if multiple threads are
+// iterating simultaneously.
+func TestLocking_TestOnBorrowFails_PoolDoesntCrash(t *testing.T) {
+	count := 100
+
+	// First we'll Create a pool where the pilfering of idle connections fails.
+	d := poolDialer{t: t}
+	p := &redis.Pool{
+		MaxIdle:   count,
+		MaxActive: count,
+		Dial:      d.dial,
+		TestOnBorrow: func(c redis.Conn, t time.Time) error {
+			return errors.New("No way back into the real world.")
+		},
+	}
+	defer p.Close()
+
+	// Fill the pool with idle connections.
+	b1 := sync.WaitGroup{}
+	b1.Add(count)
+	b2 := sync.WaitGroup{}
+	b2.Add(count)
+	for i := 0; i < count; i++ {
+		go func() {
+			c := p.Get()
+			if c.Err() != nil {
+				t.Errorf("pool get failed: %v", c.Err())
+			}
+			b1.Done()
+			b1.Wait()
+			c.Close()
+			b2.Done()
+		}()
+	}
+	b2.Wait()
+	if d.dialed != count {
+		t.Errorf("Expected %d dials, got %d", count, d.dialed)
+	}
+
+	// Spawn a bunch of goroutines to thrash the pool.
+	b2.Add(count)
+	for i := 0; i < count; i++ {
+		go func() {
+			c := p.Get()
+			if c.Err() != nil {
+				t.Errorf("pool get failed: %v", c.Err())
+			}
+			c.Close()
+			b2.Done()
+		}()
+	}
+	b2.Wait()
+	if d.dialed != count*2 {
+		t.Errorf("Expected %d dials, got %d", count*2, d.dialed)
+	}
+}
+
+func BenchmarkPoolGet(b *testing.B) {
+	b.StopTimer()
+	p := redis.Pool{Dial: redistest.Dial, MaxIdle: 2}
+	c := p.Get()
+	if err := c.Err(); err != nil {
+		b.Fatal(err)
+	}
+	c.Close()
+	defer p.Close()
+	b.StartTimer()
+	for i := 0; i < b.N; i++ {
+		c = p.Get()
+		c.Close()
+	}
+}
+
+func BenchmarkPoolGetErr(b *testing.B) {
+	b.StopTimer()
+	p := redis.Pool{Dial: redistest.Dial, MaxIdle: 2}
+	c := p.Get()
+	if err := c.Err(); err != nil {
+		b.Fatal(err)
+	}
+	c.Close()
+	defer p.Close()
+	b.StartTimer()
+	for i := 0; i < b.N; i++ {
+		c = p.Get()
+		if err := c.Err(); err != nil {
+			b.Fatal(err)
+		}
+		c.Close()
+	}
+}
+
+func BenchmarkPoolGetPing(b *testing.B) {
+	b.StopTimer()
+	p := redis.Pool{Dial: redistest.Dial, MaxIdle: 2}
+	c := p.Get()
+	if err := c.Err(); err != nil {
+		b.Fatal(err)
+	}
+	c.Close()
+	defer p.Close()
+	b.StartTimer()
+	for i := 0; i < b.N; i++ {
+		c = p.Get()
+		if _, err := c.Do("PING"); err != nil {
+			b.Fatal(err)
+		}
+		c.Close()
+	}
+}

vendor/src/github.com/garyburd/redigo/redis/pubsub.go

@@ -0,0 +1,144 @@
+// Copyright 2012 Gary Burd
+//
+// Licensed under the Apache License, Version 2.0 (the "License"): you may
+// not use this file except in compliance with the License. You may obtain
+// a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+// License for the specific language governing permissions and limitations
+// under the License.
+
+package redis
+
+import "errors"
+
+// Subscription represents a subscribe or unsubscribe notification.
+type Subscription struct {
+
+	// Kind is "subscribe", "unsubscribe", "psubscribe" or "punsubscribe"
+	Kind string
+
+	// The channel that was changed.
+	Channel string
+
+	// The current number of subscriptions for connection.
+	Count int
+}
+
+// Message represents a message notification.
+type Message struct {
+
+	// The originating channel.
+	Channel string
+
+	// The message data.
+	Data []byte
+}
+
+// PMessage represents a pmessage notification.
+type PMessage struct {
+
+	// The matched pattern.
+	Pattern string
+
+	// The originating channel.
+	Channel string
+
+	// The message data.
+	Data []byte
+}
+
+// Pong represents a pubsub pong notification.
+type Pong struct {
+	Data string
+}
+
+// PubSubConn wraps a Conn with convenience methods for subscribers.
+type PubSubConn struct {
+	Conn Conn
+}
+
+// Close closes the connection.
+func (c PubSubConn) Close() error {
+	return c.Conn.Close()
+}
+
+// Subscribe subscribes the connection to the specified channels.
+func (c PubSubConn) Subscribe(channel ...interface{}) error {
+	c.Conn.Send("SUBSCRIBE", channel...)
+	return c.Conn.Flush()
+}
+
+// PSubscribe subscribes the connection to the given patterns.
+func (c PubSubConn) PSubscribe(channel ...interface{}) error {
+	c.Conn.Send("PSUBSCRIBE", channel...)
+	return c.Conn.Flush()
+}
+
+// Unsubscribe unsubscribes the connection from the given channels, or from all
+// of them if none is given.
+func (c PubSubConn) Unsubscribe(channel ...interface{}) error {
+	c.Conn.Send("UNSUBSCRIBE", channel...)
+	return c.Conn.Flush()
+}
+
+// PUnsubscribe unsubscribes the connection from the given patterns, or from all
+// of them if none is given.
+func (c PubSubConn) PUnsubscribe(channel ...interface{}) error {
+	c.Conn.Send("PUNSUBSCRIBE", channel...)
+	return c.Conn.Flush()
+}
+
+// Ping sends a PING to the server with the specified data.
+func (c PubSubConn) Ping(data string) error {
+	c.Conn.Send("PING", data)
+	return c.Conn.Flush()
+}
+
+// Receive returns a pushed message as a Subscription, Message, PMessage, Pong
+// or error. The return value is intended to be used directly in a type switch
+// as illustrated in the PubSubConn example.
+func (c PubSubConn) Receive() interface{} {
+	reply, err := Values(c.Conn.Receive())
+	if err != nil {
+		return err
+	}
+
+	var kind string
+	reply, err = Scan(reply, &kind)
+	if err != nil {
+		return err
+	}
+
+	switch kind {
+	case "message":
+		var m Message
+		if _, err := Scan(reply, &m.Channel, &m.Data); err != nil {
+			return err
+		}
+		return m
+	case "pmessage":
+		var pm PMessage
+		if _, err := Scan(reply, &pm.Pattern, &pm.Channel, &pm.Data); err != nil {
+			return err
+		}
+		return pm
+	case "subscribe", "psubscribe", "unsubscribe", "punsubscribe":
+		s := Subscription{Kind: kind}
+		if _, err := Scan(reply, &s.Channel, &s.Count); err != nil {
+			return err
+		}
+		return s
+	case "pong":
+		var p Pong
+		if _, err := Scan(reply, &p.Data); err != nil {
+			return err
+		}
+		return p
+	}
+	return errors.New("redigo: unknown pubsub notification")
+}

vendor/src/github.com/garyburd/redigo/redis/pubsub_test.go

@@ -0,0 +1,150 @@
+// Copyright 2012 Gary Burd
+//
+// Licensed under the Apache License, Version 2.0 (the "License"): you may
+// not use this file except in compliance with the License. You may obtain
+// a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+// License for the specific language governing permissions and limitations
+// under the License.
+
+package redis_test
+
+import (
+	"fmt"
+	"net"
+	"reflect"
+	"sync"
+	"testing"
+	"time"
+
+	"github.com/garyburd/redigo/internal/redistest"
+	"github.com/garyburd/redigo/redis"
+)
+
+func publish(channel, value interface{}) {
+	c, err := dial()
+	if err != nil {
+		panic(err)
+	}
+	defer c.Close()
+	c.Do("PUBLISH", channel, value)
+}
+
+// Applications can receive pushed messages from one goroutine and manage subscriptions from another goroutine.
+func ExamplePubSubConn() {
+	c, err := dial()
+	if err != nil {
+		panic(err)
+	}
+	defer c.Close()
+	var wg sync.WaitGroup
+	wg.Add(2)
+
+	psc := redis.PubSubConn{Conn: c}
+
+	// This goroutine receives and prints pushed notifications from the server.
+	// The goroutine exits when the connection is unsubscribed from all
+	// channels or there is an error.
+	go func() {
+		defer wg.Done()
+		for {
+			switch n := psc.Receive().(type) {
+			case redis.Message:
+				fmt.Printf("Message: %s %s\n", n.Channel, n.Data)
+			case redis.PMessage:
+				fmt.Printf("PMessage: %s %s %s\n", n.Pattern, n.Channel, n.Data)
+			case redis.Subscription:
+				fmt.Printf("Subscription: %s %s %d\n", n.Kind, n.Channel, n.Count)
+				if n.Count == 0 {
+					return
+				}
+			case error:
+				fmt.Printf("error: %v\n", n)
+				return
+			}
+		}
+	}()
+
+	// This goroutine manages subscriptions for the connection.
+	go func() {
+		defer wg.Done()
+
+		psc.Subscribe("example")
+		psc.PSubscribe("p*")
+
+		// The following function calls publish a message using another
+		// connection to the Redis server.
+		publish("example", "hello")
+		publish("example", "world")
+		publish("pexample", "foo")
+		publish("pexample", "bar")
+
+		// Unsubscribe from all connections. This will cause the receiving
+		// goroutine to exit.
+		psc.Unsubscribe()
+		psc.PUnsubscribe()
+	}()
+
+	wg.Wait()
+
+	// Output:
+	// Subscription: subscribe example 1
+	// Subscription: psubscribe p* 2
+	// Message: example hello
+	// Message: example world
+	// PMessage: p* pexample foo
+	// PMessage: p* pexample bar
+	// Subscription: unsubscribe example 1
+	// Subscription: punsubscribe p* 0
+}
+
+func expectPushed(t *testing.T, c redis.PubSubConn, message string, expected interface{}) {
+	actual := c.Receive()
+	if !reflect.DeepEqual(actual, expected) {
+		t.Errorf("%s = %v, want %v", message, actual, expected)
+	}
+}
+
+func TestPushed(t *testing.T) {
+	pc, err := redistest.Dial()
+	if err != nil {
+		t.Fatalf("error connection to database, %v", err)
+	}
+	defer pc.Close()
+
+	nc, err := net.Dial("tcp", ":6379")
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer nc.Close()
+	nc.SetReadDeadline(time.Now().Add(4 * time.Second))
+
+	c := redis.PubSubConn{Conn: redis.NewConn(nc, 0, 0)}
+
+	c.Subscribe("c1")
+	expectPushed(t, c, "Subscribe(c1)", redis.Subscription{Kind: "subscribe", Channel: "c1", Count: 1})
+	c.Subscribe("c2")
+	expectPushed(t, c, "Subscribe(c2)", redis.Subscription{Kind: "subscribe", Channel: "c2", Count: 2})
+	c.PSubscribe("p1")
+	expectPushed(t, c, "PSubscribe(p1)", redis.Subscription{Kind: "psubscribe", Channel: "p1", Count: 3})
+	c.PSubscribe("p2")
+	expectPushed(t, c, "PSubscribe(p2)", redis.Subscription{Kind: "psubscribe", Channel: "p2", Count: 4})
+	c.PUnsubscribe()
+	expectPushed(t, c, "Punsubscribe(p1)", redis.Subscription{Kind: "punsubscribe", Channel: "p1", Count: 3})
+	expectPushed(t, c, "Punsubscribe()", redis.Subscription{Kind: "punsubscribe", Channel: "p2", Count: 2})
+
+	pc.Do("PUBLISH", "c1", "hello")
+	expectPushed(t, c, "PUBLISH c1 hello", redis.Message{Channel: "c1", Data: []byte("hello")})
+
+	c.Ping("hello")
+	expectPushed(t, c, `Ping("hello")`, redis.Pong{"hello"})
+
+	c.Conn.Send("PING")
+	c.Conn.Flush()
+	expectPushed(t, c, `Send("PING")`, redis.Pong{})
+}

vendor/src/github.com/garyburd/redigo/redis/redis.go

@@ -0,0 +1,44 @@
+// Copyright 2012 Gary Burd
+//
+// Licensed under the Apache License, Version 2.0 (the "License"): you may
+// not use this file except in compliance with the License. You may obtain
+// a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+// License for the specific language governing permissions and limitations
+// under the License.
+
+package redis
+
+// Error represents an error returned in a command reply.
+type Error string
+
+func (err Error) Error() string { return string(err) }
+
+// Conn represents a connection to a Redis server.
+type Conn interface {
+	// Close closes the connection.
+	Close() error
+
+	// Err returns a non-nil value if the connection is broken. The returned
+	// value is either the first non-nil value returned from the underlying
+	// network connection or a protocol parsing error. Applications should
+	// close broken connections.
+	Err() error
+
+	// Do sends a command to the server and returns the received reply.
+	Do(commandName string, args ...interface{}) (reply interface{}, err error)
+
+	// Send writes the command to the client's output buffer.
+	Send(commandName string, args ...interface{}) error
+
+	// Flush flushes the output buffer to the Redis server.
+	Flush() error
+
+	// Receive receives a single reply from the Redis server
+	Receive() (reply interface{}, err error)
+}

vendor/src/github.com/garyburd/redigo/redis/reply.go

@@ -0,0 +1,364 @@
+// Copyright 2012 Gary Burd
+//
+// Licensed under the Apache License, Version 2.0 (the "License"): you may
+// not use this file except in compliance with the License. You may obtain
+// a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+// License for the specific language governing permissions and limitations
+// under the License.
+
+package redis
+
+import (
+	"errors"
+	"fmt"
+	"strconv"
+)
+
+// ErrNil indicates that a reply value is nil.
+var ErrNil = errors.New("redigo: nil returned")
+
+// Int is a helper that converts a command reply to an integer. If err is not
+// equal to nil, then Int returns 0, err. Otherwise, Int converts the
+// reply to an int as follows:
+//
+//  Reply type    Result
+//  integer       int(reply), nil
+//  bulk string   parsed reply, nil
+//  nil           0, ErrNil
+//  other         0, error
+func Int(reply interface{}, err error) (int, error) {
+	if err != nil {
+		return 0, err
+	}
+	switch reply := reply.(type) {
+	case int64:
+		x := int(reply)
+		if int64(x) != reply {
+			return 0, strconv.ErrRange
+		}
+		return x, nil
+	case []byte:
+		n, err := strconv.ParseInt(string(reply), 10, 0)
+		return int(n), err
+	case nil:
+		return 0, ErrNil
+	case Error:
+		return 0, reply
+	}
+	return 0, fmt.Errorf("redigo: unexpected type for Int, got type %T", reply)
+}
+
+// Int64 is a helper that converts a command reply to 64 bit integer. If err is
+// not equal to nil, then Int returns 0, err. Otherwise, Int64 converts the
+// reply to an int64 as follows:
+//
+//  Reply type    Result
+//  integer       reply, nil
+//  bulk string   parsed reply, nil
+//  nil           0, ErrNil
+//  other         0, error
+func Int64(reply interface{}, err error) (int64, error) {
+	if err != nil {
+		return 0, err
+	}
+	switch reply := reply.(type) {
+	case int64:
+		return reply, nil
+	case []byte:
+		n, err := strconv.ParseInt(string(reply), 10, 64)
+		return n, err
+	case nil:
+		return 0, ErrNil
+	case Error:
+		return 0, reply
+	}
+	return 0, fmt.Errorf("redigo: unexpected type for Int64, got type %T", reply)
+}
+
+var errNegativeInt = errors.New("redigo: unexpected value for Uint64")
+
+// Uint64 is a helper that converts a command reply to 64 bit integer. If err is
+// not equal to nil, then Int returns 0, err. Otherwise, Int64 converts the
+// reply to an int64 as follows:
+//
+//  Reply type    Result
+//  integer       reply, nil
+//  bulk string   parsed reply, nil
+//  nil           0, ErrNil
+//  other         0, error
+func Uint64(reply interface{}, err error) (uint64, error) {
+	if err != nil {
+		return 0, err
+	}
+	switch reply := reply.(type) {
+	case int64:
+		if reply < 0 {
+			return 0, errNegativeInt
+		}
+		return uint64(reply), nil
+	case []byte:
+		n, err := strconv.ParseUint(string(reply), 10, 64)
+		return n, err
+	case nil:
+		return 0, ErrNil
+	case Error:
+		return 0, reply
+	}
+	return 0, fmt.Errorf("redigo: unexpected type for Uint64, got type %T", reply)
+}
+
+// Float64 is a helper that converts a command reply to 64 bit float. If err is
+// not equal to nil, then Float64 returns 0, err. Otherwise, Float64 converts
+// the reply to an int as follows:
+//
+//  Reply type    Result
+//  bulk string   parsed reply, nil
+//  nil           0, ErrNil
+//  other         0, error
+func Float64(reply interface{}, err error) (float64, error) {
+	if err != nil {
+		return 0, err
+	}
+	switch reply := reply.(type) {
+	case []byte:
+		n, err := strconv.ParseFloat(string(reply), 64)
+		return n, err
+	case nil:
+		return 0, ErrNil
+	case Error:
+		return 0, reply
+	}
+	return 0, fmt.Errorf("redigo: unexpected type for Float64, got type %T", reply)
+}
+
+// String is a helper that converts a command reply to a string. If err is not
+// equal to nil, then String returns "", err. Otherwise String converts the
+// reply to a string as follows:
+//
+//  Reply type      Result
+//  bulk string     string(reply), nil
+//  simple string   reply, nil
+//  nil             "",  ErrNil
+//  other           "",  error
+func String(reply interface{}, err error) (string, error) {
+	if err != nil {
+		return "", err
+	}
+	switch reply := reply.(type) {
+	case []byte:
+		return string(reply), nil
+	case string:
+		return reply, nil
+	case nil:
+		return "", ErrNil
+	case Error:
+		return "", reply
+	}
+	return "", fmt.Errorf("redigo: unexpected type for String, got type %T", reply)
+}
+
+// Bytes is a helper that converts a command reply to a slice of bytes. If err
+// is not equal to nil, then Bytes returns nil, err. Otherwise Bytes converts
+// the reply to a slice of bytes as follows:
+//
+//  Reply type      Result
+//  bulk string     reply, nil
+//  simple string   []byte(reply), nil
+//  nil             nil, ErrNil
+//  other           nil, error
+func Bytes(reply interface{}, err error) ([]byte, error) {
+	if err != nil {
+		return nil, err
+	}
+	switch reply := reply.(type) {
+	case []byte:
+		return reply, nil
+	case string:
+		return []byte(reply), nil
+	case nil:
+		return nil, ErrNil
+	case Error:
+		return nil, reply
+	}
+	return nil, fmt.Errorf("redigo: unexpected type for Bytes, got type %T", reply)
+}
+
+// Bool is a helper that converts a command reply to a boolean. If err is not
+// equal to nil, then Bool returns false, err. Otherwise Bool converts the
+// reply to boolean as follows:
+//
+//  Reply type      Result
+//  integer         value != 0, nil
+//  bulk string     strconv.ParseBool(reply)
+//  nil             false, ErrNil
+//  other           false, error
+func Bool(reply interface{}, err error) (bool, error) {
+	if err != nil {
+		return false, err
+	}
+	switch reply := reply.(type) {
+	case int64:
+		return reply != 0, nil
+	case []byte:
+		return strconv.ParseBool(string(reply))
+	case nil:
+		return false, ErrNil
+	case Error:
+		return false, reply
+	}
+	return false, fmt.Errorf("redigo: unexpected type for Bool, got type %T", reply)
+}
+
+// MultiBulk is deprecated. Use Values.
+func MultiBulk(reply interface{}, err error) ([]interface{}, error) { return Values(reply, err) }
+
+// Values is a helper that converts an array command reply to a []interface{}.
+// If err is not equal to nil, then Values returns nil, err. Otherwise, Values
+// converts the reply as follows:
+//
+//  Reply type      Result
+//  array           reply, nil
+//  nil             nil, ErrNil
+//  other           nil, error
+func Values(reply interface{}, err error) ([]interface{}, error) {
+	if err != nil {
+		return nil, err
+	}
+	switch reply := reply.(type) {
+	case []interface{}:
+		return reply, nil
+	case nil:
+		return nil, ErrNil
+	case Error:
+		return nil, reply
+	}
+	return nil, fmt.Errorf("redigo: unexpected type for Values, got type %T", reply)
+}
+
+// Strings is a helper that converts an array command reply to a []string. If
+// err is not equal to nil, then Strings returns nil, err. Nil array items are
+// converted to "" in the output slice. Strings returns an error if an array
+// item is not a bulk string or nil.
+func Strings(reply interface{}, err error) ([]string, error) {
+	if err != nil {
+		return nil, err
+	}
+	switch reply := reply.(type) {
+	case []interface{}:
+		result := make([]string, len(reply))
+		for i := range reply {
+			if reply[i] == nil {
+				continue
+			}
+			p, ok := reply[i].([]byte)
+			if !ok {
+				return nil, fmt.Errorf("redigo: unexpected element type for Strings, got type %T", reply[i])
+			}
+			result[i] = string(p)
+		}
+		return result, nil
+	case nil:
+		return nil, ErrNil
+	case Error:
+		return nil, reply
+	}
+	return nil, fmt.Errorf("redigo: unexpected type for Strings, got type %T", reply)
+}
+
+// Ints is a helper that converts an array command reply to a []int. If
+// err is not equal to nil, then Ints returns nil, err.
+func Ints(reply interface{}, err error) ([]int, error) {
+	var ints []int
+	if reply == nil {
+		return ints, ErrNil
+	}
+	values, err := Values(reply, err)
+	if err != nil {
+		return ints, err
+	}
+	if err := ScanSlice(values, &ints); err != nil {
+		return ints, err
+	}
+	return ints, nil
+}
+
+// StringMap is a helper that converts an array of strings (alternating key, value)
+// into a map[string]string. The HGETALL and CONFIG GET commands return replies in this format.
+// Requires an even number of values in result.
+func StringMap(result interface{}, err error) (map[string]string, error) {
+	values, err := Values(result, err)
+	if err != nil {
+		return nil, err
+	}
+	if len(values)%2 != 0 {
+		return nil, errors.New("redigo: StringMap expects even number of values result")
+	}
+	m := make(map[string]string, len(values)/2)
+	for i := 0; i < len(values); i += 2 {
+		key, okKey := values[i].([]byte)
+		value, okValue := values[i+1].([]byte)
+		if !okKey || !okValue {
+			return nil, errors.New("redigo: ScanMap key not a bulk string value")
+		}
+		m[string(key)] = string(value)
+	}
+	return m, nil
+}
+
+// IntMap is a helper that converts an array of strings (alternating key, value)
+// into a map[string]int. The HGETALL commands return replies in this format.
+// Requires an even number of values in result.
+func IntMap(result interface{}, err error) (map[string]int, error) {
+	values, err := Values(result, err)
+	if err != nil {
+		return nil, err
+	}
+	if len(values)%2 != 0 {
+		return nil, errors.New("redigo: IntMap expects even number of values result")
+	}
+	m := make(map[string]int, len(values)/2)
+	for i := 0; i < len(values); i += 2 {
+		key, ok := values[i].([]byte)
+		if !ok {
+			return nil, errors.New("redigo: ScanMap key not a bulk string value")
+		}
+		value, err := Int(values[i+1], nil)
+		if err != nil {
+			return nil, err
+		}
+		m[string(key)] = value
+	}
+	return m, nil
+}
+
+// Int64Map is a helper that converts an array of strings (alternating key, value)
+// into a map[string]int64. The HGETALL commands return replies in this format.
+// Requires an even number of values in result.
+func Int64Map(result interface{}, err error) (map[string]int64, error) {
+	values, err := Values(result, err)
+	if err != nil {
+		return nil, err
+	}
+	if len(values)%2 != 0 {
+		return nil, errors.New("redigo: Int64Map expects even number of values result")
+	}
+	m := make(map[string]int64, len(values)/2)
+	for i := 0; i < len(values); i += 2 {
+		key, ok := values[i].([]byte)
+		if !ok {
+			return nil, errors.New("redigo: ScanMap key not a bulk string value")
+		}
+		value, err := Int64(values[i+1], nil)
+		if err != nil {
+			return nil, err
+		}
+		m[string(key)] = value
+	}
+	return m, nil
+}

vendor/src/github.com/garyburd/redigo/redis/reply_test.go

@@ -0,0 +1,166 @@
+// Copyright 2012 Gary Burd
+//
+// Licensed under the Apache License, Version 2.0 (the "License"): you may
+// not use this file except in compliance with the License. You may obtain
+// a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+// License for the specific language governing permissions and limitations
+// under the License.
+
+package redis_test
+
+import (
+	"fmt"
+	"reflect"
+	"testing"
+
+	"github.com/garyburd/redigo/internal/redistest"
+	"github.com/garyburd/redigo/redis"
+)
+
+type valueError struct {
+	v   interface{}
+	err error
+}
+
+func ve(v interface{}, err error) valueError {
+	return valueError{v, err}
+}
+
+var replyTests = []struct {
+	name     interface{}
+	actual   valueError
+	expected valueError
+}{
+	{
+		"ints([v1, v2])",
+		ve(redis.Ints([]interface{}{[]byte("4"), []byte("5")}, nil)),
+		ve([]int{4, 5}, nil),
+	},
+	{
+		"ints(nil)",
+		ve(redis.Ints(nil, nil)),
+		ve([]int(nil), redis.ErrNil),
+	},
+	{
+		"strings([v1, v2])",
+		ve(redis.Strings([]interface{}{[]byte("v1"), []byte("v2")}, nil)),
+		ve([]string{"v1", "v2"}, nil),
+	},
+	{
+		"strings(nil)",
+		ve(redis.Strings(nil, nil)),
+		ve([]string(nil), redis.ErrNil),
+	},
+	{
+		"values([v1, v2])",
+		ve(redis.Values([]interface{}{[]byte("v1"), []byte("v2")}, nil)),
+		ve([]interface{}{[]byte("v1"), []byte("v2")}, nil),
+	},
+	{
+		"values(nil)",
+		ve(redis.Values(nil, nil)),
+		ve([]interface{}(nil), redis.ErrNil),
+	},
+	{
+		"float64(1.0)",
+		ve(redis.Float64([]byte("1.0"), nil)),
+		ve(float64(1.0), nil),
+	},
+	{
+		"float64(nil)",
+		ve(redis.Float64(nil, nil)),
+		ve(float64(0.0), redis.ErrNil),
+	},
+	{
+		"uint64(1)",
+		ve(redis.Uint64(int64(1), nil)),
+		ve(uint64(1), nil),
+	},
+	{
+		"uint64(-1)",
+		ve(redis.Uint64(int64(-1), nil)),
+		ve(uint64(0), redis.ErrNegativeInt),
+	},
+}
+
+func TestReply(t *testing.T) {
+	for _, rt := range replyTests {
+		if rt.actual.err != rt.expected.err {
+			t.Errorf("%s returned err %v, want %v", rt.name, rt.actual.err, rt.expected.err)
+			continue
+		}
+		if !reflect.DeepEqual(rt.actual.v, rt.expected.v) {
+			t.Errorf("%s=%+v, want %+v", rt.name, rt.actual.v, rt.expected.v)
+		}
+	}
+}
+
+// dial wraps DialTestDB() with a more suitable function name for examples.
+func dial() (redis.Conn, error) {
+	return redistest.Dial()
+}
+
+func ExampleBool() {
+	c, err := dial()
+	if err != nil {
+		panic(err)
+	}
+	defer c.Close()
+
+	c.Do("SET", "foo", 1)
+	exists, _ := redis.Bool(c.Do("EXISTS", "foo"))
+	fmt.Printf("%#v\n", exists)
+	// Output:
+	// true
+}
+
+func ExampleInt() {
+	c, err := dial()
+	if err != nil {
+		panic(err)
+	}
+	defer c.Close()
+
+	c.Do("SET", "k1", 1)
+	n, _ := redis.Int(c.Do("GET", "k1"))
+	fmt.Printf("%#v\n", n)
+	n, _ = redis.Int(c.Do("INCR", "k1"))
+	fmt.Printf("%#v\n", n)
+	// Output:
+	// 1
+	// 2
+}
+
+func ExampleInts() {
+	c, err := dial()
+	if err != nil {
+		panic(err)
+	}
+	defer c.Close()
+
+	c.Do("SADD", "set_with_integers", 4, 5, 6)
+	ints, _ := redis.Ints(c.Do("SMEMBERS", "set_with_integers"))
+	fmt.Printf("%#v\n", ints)
+	// Output:
+	// []int{4, 5, 6}
+}
+
+func ExampleString() {
+	c, err := dial()
+	if err != nil {
+		panic(err)
+	}
+	defer c.Close()
+
+	c.Do("SET", "hello", "world")
+	s, err := redis.String(c.Do("GET", "hello"))
+	fmt.Printf("%#v\n", s)
+	// Output:
+	// "world"
+}

vendor/src/github.com/garyburd/redigo/redis/scan.go

@@ -0,0 +1,513 @@
+// Copyright 2012 Gary Burd
+//
+// Licensed under the Apache License, Version 2.0 (the "License"): you may
+// not use this file except in compliance with the License. You may obtain
+// a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+// License for the specific language governing permissions and limitations
+// under the License.
+
+package redis
+
+import (
+	"errors"
+	"fmt"
+	"reflect"
+	"strconv"
+	"strings"
+	"sync"
+)
+
+func ensureLen(d reflect.Value, n int) {
+	if n > d.Cap() {
+		d.Set(reflect.MakeSlice(d.Type(), n, n))
+	} else {
+		d.SetLen(n)
+	}
+}
+
+func cannotConvert(d reflect.Value, s interface{}) error {
+	return fmt.Errorf("redigo: Scan cannot convert from %s to %s",
+		reflect.TypeOf(s), d.Type())
+}
+
+func convertAssignBytes(d reflect.Value, s []byte) (err error) {
+	switch d.Type().Kind() {
+	case reflect.Float32, reflect.Float64:
+		var x float64
+		x, err = strconv.ParseFloat(string(s), d.Type().Bits())
+		d.SetFloat(x)
+	case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
+		var x int64
+		x, err = strconv.ParseInt(string(s), 10, d.Type().Bits())
+		d.SetInt(x)
+	case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64:
+		var x uint64
+		x, err = strconv.ParseUint(string(s), 10, d.Type().Bits())
+		d.SetUint(x)
+	case reflect.Bool:
+		var x bool
+		x, err = strconv.ParseBool(string(s))
+		d.SetBool(x)
+	case reflect.String:
+		d.SetString(string(s))
+	case reflect.Slice:
+		if d.Type().Elem().Kind() != reflect.Uint8 {
+			err = cannotConvert(d, s)
+		} else {
+			d.SetBytes(s)
+		}
+	default:
+		err = cannotConvert(d, s)
+	}
+	return
+}
+
+func convertAssignInt(d reflect.Value, s int64) (err error) {
+	switch d.Type().Kind() {
+	case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
+		d.SetInt(s)
+		if d.Int() != s {
+			err = strconv.ErrRange
+			d.SetInt(0)
+		}
+	case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64:
+		if s < 0 {
+			err = strconv.ErrRange
+		} else {
+			x := uint64(s)
+			d.SetUint(x)
+			if d.Uint() != x {
+				err = strconv.ErrRange
+				d.SetUint(0)
+			}
+		}
+	case reflect.Bool:
+		d.SetBool(s != 0)
+	default:
+		err = cannotConvert(d, s)
+	}
+	return
+}
+
+func convertAssignValue(d reflect.Value, s interface{}) (err error) {
+	switch s := s.(type) {
+	case []byte:
+		err = convertAssignBytes(d, s)
+	case int64:
+		err = convertAssignInt(d, s)
+	default:
+		err = cannotConvert(d, s)
+	}
+	return err
+}
+
+func convertAssignValues(d reflect.Value, s []interface{}) error {
+	if d.Type().Kind() != reflect.Slice {
+		return cannotConvert(d, s)
+	}
+	ensureLen(d, len(s))
+	for i := 0; i < len(s); i++ {
+		if err := convertAssignValue(d.Index(i), s[i]); err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+func convertAssign(d interface{}, s interface{}) (err error) {
+	// Handle the most common destination types using type switches and
+	// fall back to reflection for all other types.
+	switch s := s.(type) {
+	case nil:
+		// ingore
+	case []byte:
+		switch d := d.(type) {
+		case *string:
+			*d = string(s)
+		case *int:
+			*d, err = strconv.Atoi(string(s))
+		case *bool:
+			*d, err = strconv.ParseBool(string(s))
+		case *[]byte:
+			*d = s
+		case *interface{}:
+			*d = s
+		case nil:
+			// skip value
+		default:
+			if d := reflect.ValueOf(d); d.Type().Kind() != reflect.Ptr {
+				err = cannotConvert(d, s)
+			} else {
+				err = convertAssignBytes(d.Elem(), s)
+			}
+		}
+	case int64:
+		switch d := d.(type) {
+		case *int:
+			x := int(s)
+			if int64(x) != s {
+				err = strconv.ErrRange
+				x = 0
+			}
+			*d = x
+		case *bool:
+			*d = s != 0
+		case *interface{}:
+			*d = s
+		case nil:
+			// skip value
+		default:
+			if d := reflect.ValueOf(d); d.Type().Kind() != reflect.Ptr {
+				err = cannotConvert(d, s)
+			} else {
+				err = convertAssignInt(d.Elem(), s)
+			}
+		}
+	case []interface{}:
+		switch d := d.(type) {
+		case *[]interface{}:
+			*d = s
+		case *interface{}:
+			*d = s
+		case nil:
+			// skip value
+		default:
+			if d := reflect.ValueOf(d); d.Type().Kind() != reflect.Ptr {
+				err = cannotConvert(d, s)
+			} else {
+				err = convertAssignValues(d.Elem(), s)
+			}
+		}
+	case Error:
+		err = s
+	default:
+		err = cannotConvert(reflect.ValueOf(d), s)
+	}
+	return
+}
+
+// Scan copies from src to the values pointed at by dest.
+//
+// The values pointed at by dest must be an integer, float, boolean, string,
+// []byte, interface{} or slices of these types. Scan uses the standard strconv
+// package to convert bulk strings to numeric and boolean types.
+//
+// If a dest value is nil, then the corresponding src value is skipped.
+//
+// If a src element is nil, then the corresponding dest value is not modified.
+//
+// To enable easy use of Scan in a loop, Scan returns the slice of src
+// following the copied values.
+func Scan(src []interface{}, dest ...interface{}) ([]interface{}, error) {
+	if len(src) < len(dest) {
+		return nil, errors.New("redigo: Scan array short")
+	}
+	var err error
+	for i, d := range dest {
+		err = convertAssign(d, src[i])
+		if err != nil {
+			break
+		}
+	}
+	return src[len(dest):], err
+}
+
+type fieldSpec struct {
+	name  string
+	index []int
+	//omitEmpty bool
+}
+
+type structSpec struct {
+	m map[string]*fieldSpec
+	l []*fieldSpec
+}
+
+func (ss *structSpec) fieldSpec(name []byte) *fieldSpec {
+	return ss.m[string(name)]
+}
+
+func compileStructSpec(t reflect.Type, depth map[string]int, index []int, ss *structSpec) {
+	for i := 0; i < t.NumField(); i++ {
+		f := t.Field(i)
+		switch {
+		case f.PkgPath != "":
+			// Ignore unexported fields.
+		case f.Anonymous:
+			// TODO: Handle pointers. Requires change to decoder and
+			// protection against infinite recursion.
+			if f.Type.Kind() == reflect.Struct {
+				compileStructSpec(f.Type, depth, append(index, i), ss)
+			}
+		default:
+			fs := &fieldSpec{name: f.Name}
+			tag := f.Tag.Get("redis")
+			p := strings.Split(tag, ",")
+			if len(p) > 0 {
+				if p[0] == "-" {
+					continue
+				}
+				if len(p[0]) > 0 {
+					fs.name = p[0]
+				}
+				for _, s := range p[1:] {
+					switch s {
+					//case "omitempty":
+					//  fs.omitempty = true
+					default:
+						panic(errors.New("redigo: unknown field flag " + s + " for type " + t.Name()))
+					}
+				}
+			}
+			d, found := depth[fs.name]
+			if !found {
+				d = 1 << 30
+			}
+			switch {
+			case len(index) == d:
+				// At same depth, remove from result.
+				delete(ss.m, fs.name)
+				j := 0
+				for i := 0; i < len(ss.l); i++ {
+					if fs.name != ss.l[i].name {
+						ss.l[j] = ss.l[i]
+						j += 1
+					}
+				}
+				ss.l = ss.l[:j]
+			case len(index) < d:
+				fs.index = make([]int, len(index)+1)
+				copy(fs.index, index)
+				fs.index[len(index)] = i
+				depth[fs.name] = len(index)
+				ss.m[fs.name] = fs
+				ss.l = append(ss.l, fs)
+			}
+		}
+	}
+}
+
+var (
+	structSpecMutex  sync.RWMutex
+	structSpecCache  = make(map[reflect.Type]*structSpec)
+	defaultFieldSpec = &fieldSpec{}
+)
+
+func structSpecForType(t reflect.Type) *structSpec {
+
+	structSpecMutex.RLock()
+	ss, found := structSpecCache[t]
+	structSpecMutex.RUnlock()
+	if found {
+		return ss
+	}
+
+	structSpecMutex.Lock()
+	defer structSpecMutex.Unlock()
+	ss, found = structSpecCache[t]
+	if found {
+		return ss
+	}
+
+	ss = &structSpec{m: make(map[string]*fieldSpec)}
+	compileStructSpec(t, make(map[string]int), nil, ss)
+	structSpecCache[t] = ss
+	return ss
+}
+
+var errScanStructValue = errors.New("redigo: ScanStruct value must be non-nil pointer to a struct")
+
+// ScanStruct scans alternating names and values from src to a struct. The
+// HGETALL and CONFIG GET commands return replies in this format.
+//
+// ScanStruct uses exported field names to match values in the response. Use
+// 'redis' field tag to override the name:
+//
+//      Field int `redis:"myName"`
+//
+// Fields with the tag redis:"-" are ignored.
+//
+// Integer, float, boolean, string and []byte fields are supported. Scan uses the
+// standard strconv package to convert bulk string values to numeric and
+// boolean types.
+//
+// If a src element is nil, then the corresponding field is not modified.
+func ScanStruct(src []interface{}, dest interface{}) error {
+	d := reflect.ValueOf(dest)
+	if d.Kind() != reflect.Ptr || d.IsNil() {
+		return errScanStructValue
+	}
+	d = d.Elem()
+	if d.Kind() != reflect.Struct {
+		return errScanStructValue
+	}
+	ss := structSpecForType(d.Type())
+
+	if len(src)%2 != 0 {
+		return errors.New("redigo: ScanStruct expects even number of values in values")
+	}
+
+	for i := 0; i < len(src); i += 2 {
+		s := src[i+1]
+		if s == nil {
+			continue
+		}
+		name, ok := src[i].([]byte)
+		if !ok {
+			return errors.New("redigo: ScanStruct key not a bulk string value")
+		}
+		fs := ss.fieldSpec(name)
+		if fs == nil {
+			continue
+		}
+		if err := convertAssignValue(d.FieldByIndex(fs.index), s); err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+var (
+	errScanSliceValue = errors.New("redigo: ScanSlice dest must be non-nil pointer to a struct")
+)
+
+// ScanSlice scans src to the slice pointed to by dest. The elements the dest
+// slice must be integer, float, boolean, string, struct or pointer to struct
+// values.
+//
+// Struct fields must be integer, float, boolean or string values. All struct
+// fields are used unless a subset is specified using fieldNames.
+func ScanSlice(src []interface{}, dest interface{}, fieldNames ...string) error {
+	d := reflect.ValueOf(dest)
+	if d.Kind() != reflect.Ptr || d.IsNil() {
+		return errScanSliceValue
+	}
+	d = d.Elem()
+	if d.Kind() != reflect.Slice {
+		return errScanSliceValue
+	}
+
+	isPtr := false
+	t := d.Type().Elem()
+	if t.Kind() == reflect.Ptr && t.Elem().Kind() == reflect.Struct {
+		isPtr = true
+		t = t.Elem()
+	}
+
+	if t.Kind() != reflect.Struct {
+		ensureLen(d, len(src))
+		for i, s := range src {
+			if s == nil {
+				continue
+			}
+			if err := convertAssignValue(d.Index(i), s); err != nil {
+				return err
+			}
+		}
+		return nil
+	}
+
+	ss := structSpecForType(t)
+	fss := ss.l
+	if len(fieldNames) > 0 {
+		fss = make([]*fieldSpec, len(fieldNames))
+		for i, name := range fieldNames {
+			fss[i] = ss.m[name]
+			if fss[i] == nil {
+				return errors.New("redigo: ScanSlice bad field name " + name)
+			}
+		}
+	}
+
+	if len(fss) == 0 {
+		return errors.New("redigo: ScanSlice no struct fields")
+	}
+
+	n := len(src) / len(fss)
+	if n*len(fss) != len(src) {
+		return errors.New("redigo: ScanSlice length not a multiple of struct field count")
+	}
+
+	ensureLen(d, n)
+	for i := 0; i < n; i++ {
+		d := d.Index(i)
+		if isPtr {
+			if d.IsNil() {
+				d.Set(reflect.New(t))
+			}
+			d = d.Elem()
+		}
+		for j, fs := range fss {
+			s := src[i*len(fss)+j]
+			if s == nil {
+				continue
+			}
+			if err := convertAssignValue(d.FieldByIndex(fs.index), s); err != nil {
+				return err
+			}
+		}
+	}
+	return nil
+}
+
+// Args is a helper for constructing command arguments from structured values.
+type Args []interface{}
+
+// Add returns the result of appending value to args.
+func (args Args) Add(value ...interface{}) Args {
+	return append(args, value...)
+}
+
+// AddFlat returns the result of appending the flattened value of v to args.
+//
+// Maps are flattened by appending the alternating keys and map values to args.
+//
+// Slices are flattened by appending the slice elements to args.
+//
+// Structs are flattened by appending the alternating names and values of
+// exported fields to args. If v is a nil struct pointer, then nothing is
+// appended. The 'redis' field tag overrides struct field names. See ScanStruct
+// for more information on the use of the 'redis' field tag.
+//
+// Other types are appended to args as is.
+func (args Args) AddFlat(v interface{}) Args {
+	rv := reflect.ValueOf(v)
+	switch rv.Kind() {
+	case reflect.Struct:
+		args = flattenStruct(args, rv)
+	case reflect.Slice:
+		for i := 0; i < rv.Len(); i++ {
+			args = append(args, rv.Index(i).Interface())
+		}
+	case reflect.Map:
+		for _, k := range rv.MapKeys() {
+			args = append(args, k.Interface(), rv.MapIndex(k).Interface())
+		}
+	case reflect.Ptr:
+		if rv.Type().Elem().Kind() == reflect.Struct {
+			if !rv.IsNil() {
+				args = flattenStruct(args, rv.Elem())
+			}
+		} else {
+			args = append(args, v)
+		}
+	default:
+		args = append(args, v)
+	}
+	return args
+}
+
+func flattenStruct(args Args, v reflect.Value) Args {
+	ss := structSpecForType(v.Type())
+	for _, fs := range ss.l {
+		fv := v.FieldByIndex(fs.index)
+		args = append(args, fs.name, fv.Interface())
+	}
+	return args
+}

vendor/src/github.com/garyburd/redigo/redis/scan_test.go

@@ -0,0 +1,412 @@
+// Copyright 2012 Gary Burd
+//
+// Licensed under the Apache License, Version 2.0 (the "License"): you may
+// not use this file except in compliance with the License. You may obtain
+// a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+// License for the specific language governing permissions and limitations
+// under the License.
+
+package redis_test
+
+import (
+	"fmt"
+	"github.com/garyburd/redigo/redis"
+	"math"
+	"reflect"
+	"testing"
+)
+
+var scanConversionTests = []struct {
+	src  interface{}
+	dest interface{}
+}{
+	{[]byte("-inf"), math.Inf(-1)},
+	{[]byte("+inf"), math.Inf(1)},
+	{[]byte("0"), float64(0)},
+	{[]byte("3.14159"), float64(3.14159)},
+	{[]byte("3.14"), float32(3.14)},
+	{[]byte("-100"), int(-100)},
+	{[]byte("101"), int(101)},
+	{int64(102), int(102)},
+	{[]byte("103"), uint(103)},
+	{int64(104), uint(104)},
+	{[]byte("105"), int8(105)},
+	{int64(106), int8(106)},
+	{[]byte("107"), uint8(107)},
+	{int64(108), uint8(108)},
+	{[]byte("0"), false},
+	{int64(0), false},
+	{[]byte("f"), false},
+	{[]byte("1"), true},
+	{int64(1), true},
+	{[]byte("t"), true},
+	{[]byte("hello"), "hello"},
+	{[]byte("world"), []byte("world")},
+	{[]interface{}{[]byte("foo")}, []interface{}{[]byte("foo")}},
+	{[]interface{}{[]byte("foo")}, []string{"foo"}},
+	{[]interface{}{[]byte("hello"), []byte("world")}, []string{"hello", "world"}},
+	{[]interface{}{[]byte("bar")}, [][]byte{[]byte("bar")}},
+	{[]interface{}{[]byte("1")}, []int{1}},
+	{[]interface{}{[]byte("1"), []byte("2")}, []int{1, 2}},
+	{[]interface{}{[]byte("1"), []byte("2")}, []float64{1, 2}},
+	{[]interface{}{[]byte("1")}, []byte{1}},
+	{[]interface{}{[]byte("1")}, []bool{true}},
+}
+
+func TestScanConversion(t *testing.T) {
+	for _, tt := range scanConversionTests {
+		values := []interface{}{tt.src}
+		dest := reflect.New(reflect.TypeOf(tt.dest))
+		values, err := redis.Scan(values, dest.Interface())
+		if err != nil {
+			t.Errorf("Scan(%v) returned error %v", tt, err)
+			continue
+		}
+		if !reflect.DeepEqual(tt.dest, dest.Elem().Interface()) {
+			t.Errorf("Scan(%v) returned %v, want %v", tt, dest.Elem().Interface(), tt.dest)
+		}
+	}
+}
+
+var scanConversionErrorTests = []struct {
+	src  interface{}
+	dest interface{}
+}{
+	{[]byte("1234"), byte(0)},
+	{int64(1234), byte(0)},
+	{[]byte("-1"), byte(0)},
+	{int64(-1), byte(0)},
+	{[]byte("junk"), false},
+	{redis.Error("blah"), false},
+}
+
+func TestScanConversionError(t *testing.T) {
+	for _, tt := range scanConversionErrorTests {
+		values := []interface{}{tt.src}
+		dest := reflect.New(reflect.TypeOf(tt.dest))
+		values, err := redis.Scan(values, dest.Interface())
+		if err == nil {
+			t.Errorf("Scan(%v) did not return error", tt)
+		}
+	}
+}
+
+func ExampleScan() {
+	c, err := dial()
+	if err != nil {
+		panic(err)
+	}
+	defer c.Close()
+
+	c.Send("HMSET", "album:1", "title", "Red", "rating", 5)
+	c.Send("HMSET", "album:2", "title", "Earthbound", "rating", 1)
+	c.Send("HMSET", "album:3", "title", "Beat")
+	c.Send("LPUSH", "albums", "1")
+	c.Send("LPUSH", "albums", "2")
+	c.Send("LPUSH", "albums", "3")
+	values, err := redis.Values(c.Do("SORT", "albums",
+		"BY", "album:*->rating",
+		"GET", "album:*->title",
+		"GET", "album:*->rating"))
+	if err != nil {
+		panic(err)
+	}
+
+	for len(values) > 0 {
+		var title string
+		rating := -1 // initialize to illegal value to detect nil.
+		values, err = redis.Scan(values, &title, &rating)
+		if err != nil {
+			panic(err)
+		}
+		if rating == -1 {
+			fmt.Println(title, "not-rated")
+		} else {
+			fmt.Println(title, rating)
+		}
+	}
+	// Output:
+	// Beat not-rated
+	// Earthbound 1
+	// Red 5
+}
+
+type s0 struct {
+	X  int
+	Y  int `redis:"y"`
+	Bt bool
+}
+
+type s1 struct {
+	X  int    `redis:"-"`
+	I  int    `redis:"i"`
+	U  uint   `redis:"u"`
+	S  string `redis:"s"`
+	P  []byte `redis:"p"`
+	B  bool   `redis:"b"`
+	Bt bool
+	Bf bool
+	s0
+}
+
+var scanStructTests = []struct {
+	title string
+	reply []string
+	value interface{}
+}{
+	{"basic",
+		[]string{"i", "-1234", "u", "5678", "s", "hello", "p", "world", "b", "t", "Bt", "1", "Bf", "0", "X", "123", "y", "456"},
+		&s1{I: -1234, U: 5678, S: "hello", P: []byte("world"), B: true, Bt: true, Bf: false, s0: s0{X: 123, Y: 456}},
+	},
+}
+
+func TestScanStruct(t *testing.T) {
+	for _, tt := range scanStructTests {
+
+		var reply []interface{}
+		for _, v := range tt.reply {
+			reply = append(reply, []byte(v))
+		}
+
+		value := reflect.New(reflect.ValueOf(tt.value).Type().Elem())
+
+		if err := redis.ScanStruct(reply, value.Interface()); err != nil {
+			t.Fatalf("ScanStruct(%s) returned error %v", tt.title, err)
+		}
+
+		if !reflect.DeepEqual(value.Interface(), tt.value) {
+			t.Fatalf("ScanStruct(%s) returned %v, want %v", tt.title, value.Interface(), tt.value)
+		}
+	}
+}
+
+func TestBadScanStructArgs(t *testing.T) {
+	x := []interface{}{"A", "b"}
+	test := func(v interface{}) {
+		if err := redis.ScanStruct(x, v); err == nil {
+			t.Errorf("Expect error for ScanStruct(%T, %T)", x, v)
+		}
+	}
+
+	test(nil)
+
+	var v0 *struct{}
+	test(v0)
+
+	var v1 int
+	test(&v1)
+
+	x = x[:1]
+	v2 := struct{ A string }{}
+	test(&v2)
+}
+
+var scanSliceTests = []struct {
+	src        []interface{}
+	fieldNames []string
+	ok         bool
+	dest       interface{}
+}{
+	{
+		[]interface{}{[]byte("1"), nil, []byte("-1")},
+		nil,
+		true,
+		[]int{1, 0, -1},
+	},
+	{
+		[]interface{}{[]byte("1"), nil, []byte("2")},
+		nil,
+		true,
+		[]uint{1, 0, 2},
+	},
+	{
+		[]interface{}{[]byte("-1")},
+		nil,
+		false,
+		[]uint{1},
+	},
+	{
+		[]interface{}{[]byte("hello"), nil, []byte("world")},
+		nil,
+		true,
+		[][]byte{[]byte("hello"), nil, []byte("world")},
+	},
+	{
+		[]interface{}{[]byte("hello"), nil, []byte("world")},
+		nil,
+		true,
+		[]string{"hello", "", "world"},
+	},
+	{
+		[]interface{}{[]byte("a1"), []byte("b1"), []byte("a2"), []byte("b2")},
+		nil,
+		true,
+		[]struct{ A, B string }{{"a1", "b1"}, {"a2", "b2"}},
+	},
+	{
+		[]interface{}{[]byte("a1"), []byte("b1")},
+		nil,
+		false,
+		[]struct{ A, B, C string }{{"a1", "b1", ""}},
+	},
+	{
+		[]interface{}{[]byte("a1"), []byte("b1"), []byte("a2"), []byte("b2")},
+		nil,
+		true,
+		[]*struct{ A, B string }{{"a1", "b1"}, {"a2", "b2"}},
+	},
+	{
+		[]interface{}{[]byte("a1"), []byte("b1"), []byte("a2"), []byte("b2")},
+		[]string{"A", "B"},
+		true,
+		[]struct{ A, C, B string }{{"a1", "", "b1"}, {"a2", "", "b2"}},
+	},
+	{
+		[]interface{}{[]byte("a1"), []byte("b1"), []byte("a2"), []byte("b2")},
+		nil,
+		false,
+		[]struct{}{},
+	},
+}
+
+func TestScanSlice(t *testing.T) {
+	for _, tt := range scanSliceTests {
+
+		typ := reflect.ValueOf(tt.dest).Type()
+		dest := reflect.New(typ)
+
+		err := redis.ScanSlice(tt.src, dest.Interface(), tt.fieldNames...)
+		if tt.ok != (err == nil) {
+			t.Errorf("ScanSlice(%v, []%s, %v) returned error %v", tt.src, typ, tt.fieldNames, err)
+			continue
+		}
+		if tt.ok && !reflect.DeepEqual(dest.Elem().Interface(), tt.dest) {
+			t.Errorf("ScanSlice(src, []%s) returned %#v, want %#v", typ, dest.Elem().Interface(), tt.dest)
+		}
+	}
+}
+
+func ExampleScanSlice() {
+	c, err := dial()
+	if err != nil {
+		panic(err)
+	}
+	defer c.Close()
+
+	c.Send("HMSET", "album:1", "title", "Red", "rating", 5)
+	c.Send("HMSET", "album:2", "title", "Earthbound", "rating", 1)
+	c.Send("HMSET", "album:3", "title", "Beat", "rating", 4)
+	c.Send("LPUSH", "albums", "1")
+	c.Send("LPUSH", "albums", "2")
+	c.Send("LPUSH", "albums", "3")
+	values, err := redis.Values(c.Do("SORT", "albums",
+		"BY", "album:*->rating",
+		"GET", "album:*->title",
+		"GET", "album:*->rating"))
+	if err != nil {
+		panic(err)
+	}
+
+	var albums []struct {
+		Title  string
+		Rating int
+	}
+	if err := redis.ScanSlice(values, &albums); err != nil {
+		panic(err)
+	}
+	fmt.Printf("%v\n", albums)
+	// Output:
+	// [{Earthbound 1} {Beat 4} {Red 5}]
+}
+
+var argsTests = []struct {
+	title    string
+	actual   redis.Args
+	expected redis.Args
+}{
+	{"struct ptr",
+		redis.Args{}.AddFlat(&struct {
+			I  int    `redis:"i"`
+			U  uint   `redis:"u"`
+			S  string `redis:"s"`
+			P  []byte `redis:"p"`
+			Bt bool
+			Bf bool
+		}{
+			-1234, 5678, "hello", []byte("world"), true, false,
+		}),
+		redis.Args{"i", int(-1234), "u", uint(5678), "s", "hello", "p", []byte("world"), "Bt", true, "Bf", false},
+	},
+	{"struct",
+		redis.Args{}.AddFlat(struct{ I int }{123}),
+		redis.Args{"I", 123},
+	},
+	{"slice",
+		redis.Args{}.Add(1).AddFlat([]string{"a", "b", "c"}).Add(2),
+		redis.Args{1, "a", "b", "c", 2},
+	},
+}
+
+func TestArgs(t *testing.T) {
+	for _, tt := range argsTests {
+		if !reflect.DeepEqual(tt.actual, tt.expected) {
+			t.Fatalf("%s is %v, want %v", tt.title, tt.actual, tt.expected)
+		}
+	}
+}
+
+func ExampleArgs() {
+	c, err := dial()
+	if err != nil {
+		panic(err)
+	}
+	defer c.Close()
+
+	var p1, p2 struct {
+		Title  string `redis:"title"`
+		Author string `redis:"author"`
+		Body   string `redis:"body"`
+	}
+
+	p1.Title = "Example"
+	p1.Author = "Gary"
+	p1.Body = "Hello"
+
+	if _, err := c.Do("HMSET", redis.Args{}.Add("id1").AddFlat(&p1)...); err != nil {
+		panic(err)
+	}
+
+	m := map[string]string{
+		"title":  "Example2",
+		"author": "Steve",
+		"body":   "Map",
+	}
+
+	if _, err := c.Do("HMSET", redis.Args{}.Add("id2").AddFlat(m)...); err != nil {
+		panic(err)
+	}
+
+	for _, id := range []string{"id1", "id2"} {
+
+		v, err := redis.Values(c.Do("HGETALL", id))
+		if err != nil {
+			panic(err)
+		}
+
+		if err := redis.ScanStruct(v, &p2); err != nil {
+			panic(err)
+		}
+
+		fmt.Printf("%+v\n", p2)
+	}
+
+	// Output:
+	// {Title:Example Author:Gary Body:Hello}
+	// {Title:Example2 Author:Steve Body:Map}
+}

vendor/src/github.com/garyburd/redigo/redis/script.go

@@ -0,0 +1,86 @@
+// Copyright 2012 Gary Burd
+//
+// Licensed under the Apache License, Version 2.0 (the "License"): you may
+// not use this file except in compliance with the License. You may obtain
+// a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+// License for the specific language governing permissions and limitations
+// under the License.
+
+package redis
+
+import (
+	"crypto/sha1"
+	"encoding/hex"
+	"io"
+	"strings"
+)
+
+// Script encapsulates the source, hash and key count for a Lua script. See
+// http://redis.io/commands/eval for information on scripts in Redis.
+type Script struct {
+	keyCount int
+	src      string
+	hash     string
+}
+
+// NewScript returns a new script object. If keyCount is greater than or equal
+// to zero, then the count is automatically inserted in the EVAL command
+// argument list. If keyCount is less than zero, then the application supplies
+// the count as the first value in the keysAndArgs argument to the Do, Send and
+// SendHash methods.
+func NewScript(keyCount int, src string) *Script {
+	h := sha1.New()
+	io.WriteString(h, src)
+	return &Script{keyCount, src, hex.EncodeToString(h.Sum(nil))}
+}
+
+func (s *Script) args(spec string, keysAndArgs []interface{}) []interface{} {
+	var args []interface{}
+	if s.keyCount < 0 {
+		args = make([]interface{}, 1+len(keysAndArgs))
+		args[0] = spec
+		copy(args[1:], keysAndArgs)
+	} else {
+		args = make([]interface{}, 2+len(keysAndArgs))
+		args[0] = spec
+		args[1] = s.keyCount
+		copy(args[2:], keysAndArgs)
+	}
+	return args
+}
+
+// Do evaluates the script. Under the covers, Do optimistically evaluates the
+// script using the EVALSHA command. If the command fails because the script is
+// not loaded, then Do evaluates the script using the EVAL command (thus
+// causing the script to load).
+func (s *Script) Do(c Conn, keysAndArgs ...interface{}) (interface{}, error) {
+	v, err := c.Do("EVALSHA", s.args(s.hash, keysAndArgs)...)
+	if e, ok := err.(Error); ok && strings.HasPrefix(string(e), "NOSCRIPT ") {
+		v, err = c.Do("EVAL", s.args(s.src, keysAndArgs)...)
+	}
+	return v, err
+}
+
+// SendHash evaluates the script without waiting for the reply. The script is
+// evaluated with the EVALSHA command. The application must ensure that the
+// script is loaded by a previous call to Send, Do or Load methods.
+func (s *Script) SendHash(c Conn, keysAndArgs ...interface{}) error {
+	return c.Send("EVALSHA", s.args(s.hash, keysAndArgs)...)
+}
+
+// Send evaluates the script without waiting for the reply.
+func (s *Script) Send(c Conn, keysAndArgs ...interface{}) error {
+	return c.Send("EVAL", s.args(s.src, keysAndArgs)...)
+}
+
+// Load loads the script without evaluating it.
+func (s *Script) Load(c Conn) error {
+	_, err := c.Do("SCRIPT", "LOAD", s.src)
+	return err
+}

vendor/src/github.com/garyburd/redigo/redis/script_test.go

@@ -0,0 +1,93 @@
+// Copyright 2012 Gary Burd
+//
+// Licensed under the Apache License, Version 2.0 (the "License"): you may
+// not use this file except in compliance with the License. You may obtain
+// a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+// License for the specific language governing permissions and limitations
+// under the License.
+
+package redis_test
+
+import (
+	"fmt"
+	"reflect"
+	"testing"
+	"time"
+
+	"github.com/garyburd/redigo/internal/redistest"
+	"github.com/garyburd/redigo/redis"
+)
+
+func ExampleScript(c redis.Conn, reply interface{}, err error) {
+	// Initialize a package-level variable with a script.
+	var getScript = redis.NewScript(1, `return redis.call('get', KEYS[1])`)
+
+	// In a function, use the script Do method to evaluate the script. The Do
+	// method optimistically uses the EVALSHA command. If the script is not
+	// loaded, then the Do method falls back to the EVAL command.
+	reply, err = getScript.Do(c, "foo")
+}
+
+func TestScript(t *testing.T) {
+	c, err := redistest.Dial()
+	if err != nil {
+		t.Fatalf("error connection to database, %v", err)
+	}
+	defer c.Close()
+
+	// To test fall back in Do, we make script unique by adding comment with current time.
+	script := fmt.Sprintf("--%d\nreturn {KEYS[1],KEYS[2],ARGV[1],ARGV[2]}", time.Now().UnixNano())
+	s := redis.NewScript(2, script)
+	reply := []interface{}{[]byte("key1"), []byte("key2"), []byte("arg1"), []byte("arg2")}
+
+	v, err := s.Do(c, "key1", "key2", "arg1", "arg2")
+	if err != nil {
+		t.Errorf("s.Do(c, ...) returned %v", err)
+	}
+
+	if !reflect.DeepEqual(v, reply) {
+		t.Errorf("s.Do(c, ..); = %v, want %v", v, reply)
+	}
+
+	err = s.Load(c)
+	if err != nil {
+		t.Errorf("s.Load(c) returned %v", err)
+	}
+
+	err = s.SendHash(c, "key1", "key2", "arg1", "arg2")
+	if err != nil {
+		t.Errorf("s.SendHash(c, ...) returned %v", err)
+	}
+
+	err = c.Flush()
+	if err != nil {
+		t.Errorf("c.Flush() returned %v", err)
+	}
+
+	v, err = c.Receive()
+	if !reflect.DeepEqual(v, reply) {
+		t.Errorf("s.SendHash(c, ..); c.Receive() = %v, want %v", v, reply)
+	}
+
+	err = s.Send(c, "key1", "key2", "arg1", "arg2")
+	if err != nil {
+		t.Errorf("s.Send(c, ...) returned %v", err)
+	}
+
+	err = c.Flush()
+	if err != nil {
+		t.Errorf("c.Flush() returned %v", err)
+	}
+
+	v, err = c.Receive()
+	if !reflect.DeepEqual(v, reply) {
+		t.Errorf("s.Send(c, ..); c.Receive() = %v, want %v", v, reply)
+	}
+
+}

vendor/src/github.com/garyburd/redigo/redis/test_test.go

@@ -0,0 +1,38 @@
+// Copyright 2012 Gary Burd
+//
+// Licensed under the Apache License, Version 2.0 (the "License"): you may
+// not use this file except in compliance with the License. You may obtain
+// a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+// License for the specific language governing permissions and limitations
+// under the License.
+
+package redis
+
+import (
+	"bufio"
+	"net"
+	"time"
+)
+
+func SetNowFunc(f func() time.Time) {
+	nowFunc = f
+}
+
+type nopCloser struct{ net.Conn }
+
+func (nopCloser) Close() error { return nil }
+
+// NewConnBufio is a hook for tests.
+func NewConnBufio(rw bufio.ReadWriter) Conn {
+	return &conn{br: rw.Reader, bw: rw.Writer, conn: nopCloser{}}
+}
+
+var (
+	ErrNegativeInt = errNegativeInt
+)

vendor/src/github.com/garyburd/redigo/redis/zpop_example_test.go

@@ -0,0 +1,113 @@
+// Copyright 2013 Gary Burd
+//
+// Licensed under the Apache License, Version 2.0 (the "License"): you may
+// not use this file except in compliance with the License. You may obtain
+// a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+// License for the specific language governing permissions and limitations
+// under the License.
+
+package redis_test
+
+import (
+	"fmt"
+	"github.com/garyburd/redigo/redis"
+)
+
+// zpop pops a value from the ZSET key using WATCH/MULTI/EXEC commands.
+func zpop(c redis.Conn, key string) (result string, err error) {
+
+	defer func() {
+		// Return connection to normal state on error.
+		if err != nil {
+			c.Do("DISCARD")
+		}
+	}()
+
+	// Loop until transaction is successful.
+	for {
+		if _, err := c.Do("WATCH", key); err != nil {
+			return "", err
+		}
+
+		members, err := redis.Strings(c.Do("ZRANGE", key, 0, 0))
+		if err != nil {
+			return "", err
+		}
+		if len(members) != 1 {
+			return "", redis.ErrNil
+		}
+
+		c.Send("MULTI")
+		c.Send("ZREM", key, members[0])
+		queued, err := c.Do("EXEC")
+		if err != nil {
+			return "", err
+		}
+
+		if queued != nil {
+			result = members[0]
+			break
+		}
+	}
+
+	return result, nil
+}
+
+// zpopScript pops a value from a ZSET.
+var zpopScript = redis.NewScript(1, `
+    local r = redis.call('ZRANGE', KEYS[1], 0, 0)
+    if r ~= nil then
+        r = r[1]
+        redis.call('ZREM', KEYS[1], r)
+    end
+    return r
+`)
+
+// This example implements ZPOP as described at
+// http://redis.io/topics/transactions using WATCH/MULTI/EXEC and scripting.
+func Example_zpop() {
+	c, err := dial()
+	if err != nil {
+		fmt.Println(err)
+		return
+	}
+	defer c.Close()
+
+	// Add test data using a pipeline.
+
+	for i, member := range []string{"red", "blue", "green"} {
+		c.Send("ZADD", "zset", i, member)
+	}
+	if _, err := c.Do(""); err != nil {
+		fmt.Println(err)
+		return
+	}
+
+	// Pop using WATCH/MULTI/EXEC
+
+	v, err := zpop(c, "zset")
+	if err != nil {
+		fmt.Println(err)
+		return
+	}
+	fmt.Println(v)
+
+	// Pop using a script.
+
+	v, err = redis.String(zpopScript.Do(c, "zset"))
+	if err != nil {
+		fmt.Println(err)
+		return
+	}
+	fmt.Println(v)
+
+	// Output:
+	// red
+	// blue
+}

vendor/src/github.com/garyburd/redigo/redisx/connmux.go

@@ -0,0 +1,152 @@
+// Copyright 2014 Gary Burd
+//
+// Licensed under the Apache License, Version 2.0 (the "License"): you may
+// not use this file except in compliance with the License. You may obtain
+// a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+// License for the specific language governing permissions and limitations
+// under the License.
+
+package redisx
+
+import (
+	"errors"
+	"sync"
+
+	"github.com/garyburd/redigo/internal"
+	"github.com/garyburd/redigo/redis"
+)
+
+// ConnMux multiplexes one or more connections to a single underlying
+// connection. The ConnMux connections do not support concurrency, commands
+// that associate server side state with the connection or commands that put
+// the connection in a special mode.
+type ConnMux struct {
+	c redis.Conn
+
+	sendMu sync.Mutex
+	sendID uint
+
+	recvMu   sync.Mutex
+	recvID   uint
+	recvWait map[uint]chan struct{}
+}
+
+func NewConnMux(c redis.Conn) *ConnMux {
+	return &ConnMux{c: c, recvWait: make(map[uint]chan struct{})}
+}
+
+// Get gets a connection. The application must close the returned connection.
+func (p *ConnMux) Get() redis.Conn {
+	c := &muxConn{p: p}
+	c.ids = c.buf[:0]
+	return c
+}
+
+// Close closes the underlying connection.
+func (p *ConnMux) Close() error {
+	return p.c.Close()
+}
+
+type muxConn struct {
+	p   *ConnMux
+	ids []uint
+	buf [8]uint
+}
+
+func (c *muxConn) send(flush bool, cmd string, args ...interface{}) error {
+	if internal.LookupCommandInfo(cmd).Set != 0 {
+		return errors.New("command not supported by mux pool")
+	}
+	p := c.p
+	p.sendMu.Lock()
+	id := p.sendID
+	c.ids = append(c.ids, id)
+	p.sendID++
+	err := p.c.Send(cmd, args...)
+	if flush {
+		err = p.c.Flush()
+	}
+	p.sendMu.Unlock()
+	return err
+}
+
+func (c *muxConn) Send(cmd string, args ...interface{}) error {
+	return c.send(false, cmd, args...)
+}
+
+func (c *muxConn) Flush() error {
+	p := c.p
+	p.sendMu.Lock()
+	err := p.c.Flush()
+	p.sendMu.Unlock()
+	return err
+}
+
+func (c *muxConn) Receive() (interface{}, error) {
+	if len(c.ids) == 0 {
+		return nil, errors.New("mux pool underflow")
+	}
+
+	id := c.ids[0]
+	c.ids = c.ids[1:]
+	if len(c.ids) == 0 {
+		c.ids = c.buf[:0]
+	}
+
+	p := c.p
+	p.recvMu.Lock()
+	if p.recvID != id {
+		ch := make(chan struct{})
+		p.recvWait[id] = ch
+		p.recvMu.Unlock()
+		<-ch
+		p.recvMu.Lock()
+		if p.recvID != id {
+			panic("out of sync")
+		}
+	}
+
+	v, err := p.c.Receive()
+
+	id++
+	p.recvID = id
+	ch, ok := p.recvWait[id]
+	if ok {
+		delete(p.recvWait, id)
+	}
+	p.recvMu.Unlock()
+	if ok {
+		ch <- struct{}{}
+	}
+
+	return v, err
+}
+
+func (c *muxConn) Close() error {
+	var err error
+	if len(c.ids) == 0 {
+		return nil
+	}
+	c.Flush()
+	for _ = range c.ids {
+		_, err = c.Receive()
+	}
+	return err
+}
+
+func (c *muxConn) Do(cmd string, args ...interface{}) (interface{}, error) {
+	if err := c.send(true, cmd, args...); err != nil {
+		return nil, err
+	}
+	return c.Receive()
+}
+
+func (c *muxConn) Err() error {
+	return c.p.c.Err()
+}

vendor/src/github.com/garyburd/redigo/redisx/connmux_test.go

@@ -0,0 +1,259 @@
+// Copyright 2014 Gary Burd
+//
+// Licensed under the Apache License, Version 2.0 (the "License"): you may
+// not use this file except in compliance with the License. You may obtain
+// a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+// License for the specific language governing permissions and limitations
+// under the License.
+
+package redisx_test
+
+import (
+	"net/textproto"
+	"sync"
+	"testing"
+
+	"github.com/garyburd/redigo/internal/redistest"
+	"github.com/garyburd/redigo/redis"
+	"github.com/garyburd/redigo/redisx"
+)
+
+func TestConnMux(t *testing.T) {
+	c, err := redistest.Dial()
+	if err != nil {
+		t.Fatalf("error connection to database, %v", err)
+	}
+	m := redisx.NewConnMux(c)
+	defer m.Close()
+
+	c1 := m.Get()
+	c2 := m.Get()
+	c1.Send("ECHO", "hello")
+	c2.Send("ECHO", "world")
+	c1.Flush()
+	c2.Flush()
+	s, err := redis.String(c1.Receive())
+	if err != nil {
+		t.Fatal(err)
+	}
+	if s != "hello" {
+		t.Fatalf("echo returned %q, want %q", s, "hello")
+	}
+	s, err = redis.String(c2.Receive())
+	if err != nil {
+		t.Fatal(err)
+	}
+	if s != "world" {
+		t.Fatalf("echo returned %q, want %q", s, "world")
+	}
+	c1.Close()
+	c2.Close()
+}
+
+func TestConnMuxClose(t *testing.T) {
+	c, err := redistest.Dial()
+	if err != nil {
+		t.Fatalf("error connection to database, %v", err)
+	}
+	m := redisx.NewConnMux(c)
+	defer m.Close()
+
+	c1 := m.Get()
+	c2 := m.Get()
+
+	if err := c1.Send("ECHO", "hello"); err != nil {
+		t.Fatal(err)
+	}
+	if err := c1.Close(); err != nil {
+		t.Fatal(err)
+	}
+
+	if err := c2.Send("ECHO", "world"); err != nil {
+		t.Fatal(err)
+	}
+	if err := c2.Flush(); err != nil {
+		t.Fatal(err)
+	}
+
+	s, err := redis.String(c2.Receive())
+	if err != nil {
+		t.Fatal(err)
+	}
+	if s != "world" {
+		t.Fatalf("echo returned %q, want %q", s, "world")
+	}
+	c2.Close()
+}
+
+func BenchmarkConn(b *testing.B) {
+	b.StopTimer()
+	c, err := redistest.Dial()
+	if err != nil {
+		b.Fatalf("error connection to database, %v", err)
+	}
+	defer c.Close()
+	b.StartTimer()
+
+	for i := 0; i < b.N; i++ {
+		if _, err := c.Do("PING"); err != nil {
+			b.Fatal(err)
+		}
+	}
+}
+
+func BenchmarkConnMux(b *testing.B) {
+	b.StopTimer()
+	c, err := redistest.Dial()
+	if err != nil {
+		b.Fatalf("error connection to database, %v", err)
+	}
+	m := redisx.NewConnMux(c)
+	defer m.Close()
+
+	b.StartTimer()
+
+	for i := 0; i < b.N; i++ {
+		c := m.Get()
+		if _, err := c.Do("PING"); err != nil {
+			b.Fatal(err)
+		}
+		c.Close()
+	}
+}
+
+func BenchmarkPool(b *testing.B) {
+	b.StopTimer()
+
+	p := redis.Pool{Dial: redistest.Dial, MaxIdle: 1}
+	defer p.Close()
+
+	// Fill the pool.
+	c := p.Get()
+	if err := c.Err(); err != nil {
+		b.Fatal(err)
+	}
+	c.Close()
+
+	b.StartTimer()
+
+	for i := 0; i < b.N; i++ {
+		c := p.Get()
+		if _, err := c.Do("PING"); err != nil {
+			b.Fatal(err)
+		}
+		c.Close()
+	}
+}
+
+const numConcurrent = 10
+
+func BenchmarkConnMuxConcurrent(b *testing.B) {
+	b.StopTimer()
+	c, err := redistest.Dial()
+	if err != nil {
+		b.Fatalf("error connection to database, %v", err)
+	}
+	defer c.Close()
+
+	m := redisx.NewConnMux(c)
+
+	var wg sync.WaitGroup
+	wg.Add(numConcurrent)
+
+	b.StartTimer()
+
+	for i := 0; i < numConcurrent; i++ {
+		go func() {
+			defer wg.Done()
+			for i := 0; i < b.N; i++ {
+				c := m.Get()
+				if _, err := c.Do("PING"); err != nil {
+					b.Fatal(err)
+				}
+				c.Close()
+			}
+		}()
+	}
+	wg.Wait()
+}
+
+func BenchmarkPoolConcurrent(b *testing.B) {
+	b.StopTimer()
+
+	p := redis.Pool{Dial: redistest.Dial, MaxIdle: numConcurrent}
+	defer p.Close()
+
+	// Fill the pool.
+	conns := make([]redis.Conn, numConcurrent)
+	for i := range conns {
+		c := p.Get()
+		if err := c.Err(); err != nil {
+			b.Fatal(err)
+		}
+		conns[i] = c
+	}
+	for _, c := range conns {
+		c.Close()
+	}
+
+	var wg sync.WaitGroup
+	wg.Add(numConcurrent)
+
+	b.StartTimer()
+
+	for i := 0; i < numConcurrent; i++ {
+		go func() {
+			defer wg.Done()
+			for i := 0; i < b.N; i++ {
+				c := p.Get()
+				if _, err := c.Do("PING"); err != nil {
+					b.Fatal(err)
+				}
+				c.Close()
+			}
+		}()
+	}
+	wg.Wait()
+}
+
+func BenchmarkPipelineConcurrency(b *testing.B) {
+	b.StopTimer()
+	c, err := redistest.Dial()
+	if err != nil {
+		b.Fatalf("error connection to database, %v", err)
+	}
+	defer c.Close()
+
+	var wg sync.WaitGroup
+	wg.Add(numConcurrent)
+
+	var pipeline textproto.Pipeline
+
+	b.StartTimer()
+
+	for i := 0; i < numConcurrent; i++ {
+		go func() {
+			defer wg.Done()
+			for i := 0; i < b.N; i++ {
+				id := pipeline.Next()
+				pipeline.StartRequest(id)
+				c.Send("PING")
+				c.Flush()
+				pipeline.EndRequest(id)
+				pipeline.StartResponse(id)
+				_, err := c.Receive()
+				if err != nil {
+					b.Fatal(err)
+				}
+				pipeline.EndResponse(id)
+			}
+		}()
+	}
+	wg.Wait()
+}

vendor/src/github.com/garyburd/redigo/redisx/doc.go

@@ -0,0 +1,17 @@
+// Copyright 2012 Gary Burd
+//
+// Licensed under the Apache License, Version 2.0 (the "License"): you may
+// not use this file except in compliance with the License. You may obtain
+// a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+// License for the specific language governing permissions and limitations
+// under the License.
+
+// Package redisx contains experimental features for Redigo. Features in this
+// package may be modified or deleted at any time.
+package redisx // import "github.com/garyburd/redigo/redisx"

vendor/src/github.com/gorilla/context/LICENSE

@@ -0,0 +1,27 @@
+Copyright (c) 2012 Rodrigo Moraes. 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.

vendor/src/github.com/gorilla/context/README.md

@@ -0,0 +1,7 @@
+context
+=======
+[![Build Status](https://travis-ci.org/gorilla/context.png?branch=master)](https://travis-ci.org/gorilla/context)
+
+gorilla/context is a general purpose registry for global request variables.
+
+Read the full documentation here: http://www.gorillatoolkit.org/pkg/context

vendor/src/github.com/gorilla/context/context.go

@@ -0,0 +1,143 @@
+// Copyright 2012 The Gorilla 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 context
+
+import (
+	"net/http"
+	"sync"
+	"time"
+)
+
+var (
+	mutex sync.RWMutex
+	data  = make(map[*http.Request]map[interface{}]interface{})
+	datat = make(map[*http.Request]int64)
+)
+
+// Set stores a value for a given key in a given request.
+func Set(r *http.Request, key, val interface{}) {
+	mutex.Lock()
+	if data[r] == nil {
+		data[r] = make(map[interface{}]interface{})
+		datat[r] = time.Now().Unix()
+	}
+	data[r][key] = val
+	mutex.Unlock()
+}
+
+// Get returns a value stored for a given key in a given request.
+func Get(r *http.Request, key interface{}) interface{} {
+	mutex.RLock()
+	if ctx := data[r]; ctx != nil {
+		value := ctx[key]
+		mutex.RUnlock()
+		return value
+	}
+	mutex.RUnlock()
+	return nil
+}
+
+// GetOk returns stored value and presence state like multi-value return of map access.
+func GetOk(r *http.Request, key interface{}) (interface{}, bool) {
+	mutex.RLock()
+	if _, ok := data[r]; ok {
+		value, ok := data[r][key]
+		mutex.RUnlock()
+		return value, ok
+	}
+	mutex.RUnlock()
+	return nil, false
+}
+
+// GetAll returns all stored values for the request as a map. Nil is returned for invalid requests.
+func GetAll(r *http.Request) map[interface{}]interface{} {
+	mutex.RLock()
+	if context, ok := data[r]; ok {
+		result := make(map[interface{}]interface{}, len(context))
+		for k, v := range context {
+			result[k] = v
+		}
+		mutex.RUnlock()
+		return result
+	}
+	mutex.RUnlock()
+	return nil
+}
+
+// GetAllOk returns all stored values for the request as a map and a boolean value that indicates if
+// the request was registered.
+func GetAllOk(r *http.Request) (map[interface{}]interface{}, bool) {
+	mutex.RLock()
+	context, ok := data[r]
+	result := make(map[interface{}]interface{}, len(context))
+	for k, v := range context {
+		result[k] = v
+	}
+	mutex.RUnlock()
+	return result, ok
+}
+
+// Delete removes a value stored for a given key in a given request.
+func Delete(r *http.Request, key interface{}) {
+	mutex.Lock()
+	if data[r] != nil {
+		delete(data[r], key)
+	}
+	mutex.Unlock()
+}
+
+// Clear removes all values stored for a given request.
+//
+// This is usually called by a handler wrapper to clean up request
+// variables at the end of a request lifetime. See ClearHandler().
+func Clear(r *http.Request) {
+	mutex.Lock()
+	clear(r)
+	mutex.Unlock()
+}
+
+// clear is Clear without the lock.
+func clear(r *http.Request) {
+	delete(data, r)
+	delete(datat, r)
+}
+
+// Purge removes request data stored for longer than maxAge, in seconds.
+// It returns the amount of requests removed.
+//
+// If maxAge <= 0, all request data is removed.
+//
+// This is only used for sanity check: in case context cleaning was not
+// properly set some request data can be kept forever, consuming an increasing
+// amount of memory. In case this is detected, Purge() must be called
+// periodically until the problem is fixed.
+func Purge(maxAge int) int {
+	mutex.Lock()
+	count := 0
+	if maxAge <= 0 {
+		count = len(data)
+		data = make(map[*http.Request]map[interface{}]interface{})
+		datat = make(map[*http.Request]int64)
+	} else {
+		min := time.Now().Unix() - int64(maxAge)
+		for r := range data {
+			if datat[r] < min {
+				clear(r)
+				count++
+			}
+		}
+	}
+	mutex.Unlock()
+	return count
+}
+
+// ClearHandler wraps an http.Handler and clears request values at the end
+// of a request lifetime.
+func ClearHandler(h http.Handler) http.Handler {
+	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		defer Clear(r)
+		h.ServeHTTP(w, r)
+	})
+}

vendor/src/github.com/gorilla/context/context_test.go

@@ -0,0 +1,161 @@
+// Copyright 2012 The Gorilla 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 context
+
+import (
+	"net/http"
+	"testing"
+)
+
+type keyType int
+
+const (
+	key1 keyType = iota
+	key2
+)
+
+func TestContext(t *testing.T) {
+	assertEqual := func(val interface{}, exp interface{}) {
+		if val != exp {
+			t.Errorf("Expected %v, got %v.", exp, val)
+		}
+	}
+
+	r, _ := http.NewRequest("GET", "http://localhost:8080/", nil)
+	emptyR, _ := http.NewRequest("GET", "http://localhost:8080/", nil)
+
+	// Get()
+	assertEqual(Get(r, key1), nil)
+
+	// Set()
+	Set(r, key1, "1")
+	assertEqual(Get(r, key1), "1")
+	assertEqual(len(data[r]), 1)
+
+	Set(r, key2, "2")
+	assertEqual(Get(r, key2), "2")
+	assertEqual(len(data[r]), 2)
+
+	//GetOk
+	value, ok := GetOk(r, key1)
+	assertEqual(value, "1")
+	assertEqual(ok, true)
+
+	value, ok = GetOk(r, "not exists")
+	assertEqual(value, nil)
+	assertEqual(ok, false)
+
+	Set(r, "nil value", nil)
+	value, ok = GetOk(r, "nil value")
+	assertEqual(value, nil)
+	assertEqual(ok, true)
+
+	// GetAll()
+	values := GetAll(r)
+	assertEqual(len(values), 3)
+
+	// GetAll() for empty request
+	values = GetAll(emptyR)
+	if values != nil {
+		t.Error("GetAll didn't return nil value for invalid request")
+	}
+
+	// GetAllOk()
+	values, ok = GetAllOk(r)
+	assertEqual(len(values), 3)
+	assertEqual(ok, true)
+
+	// GetAllOk() for empty request
+	values, ok = GetAllOk(emptyR)
+	assertEqual(value, nil)
+	assertEqual(ok, false)
+
+	// Delete()
+	Delete(r, key1)
+	assertEqual(Get(r, key1), nil)
+	assertEqual(len(data[r]), 2)
+
+	Delete(r, key2)
+	assertEqual(Get(r, key2), nil)
+	assertEqual(len(data[r]), 1)
+
+	// Clear()
+	Clear(r)
+	assertEqual(len(data), 0)
+}
+
+func parallelReader(r *http.Request, key string, iterations int, wait, done chan struct{}) {
+	<-wait
+	for i := 0; i < iterations; i++ {
+		Get(r, key)
+	}
+	done <- struct{}{}
+
+}
+
+func parallelWriter(r *http.Request, key, value string, iterations int, wait, done chan struct{}) {
+	<-wait
+	for i := 0; i < iterations; i++ {
+		Set(r, key, value)
+	}
+	done <- struct{}{}
+
+}
+
+func benchmarkMutex(b *testing.B, numReaders, numWriters, iterations int) {
+
+	b.StopTimer()
+	r, _ := http.NewRequest("GET", "http://localhost:8080/", nil)
+	done := make(chan struct{})
+	b.StartTimer()
+
+	for i := 0; i < b.N; i++ {
+		wait := make(chan struct{})
+
+		for i := 0; i < numReaders; i++ {
+			go parallelReader(r, "test", iterations, wait, done)
+		}
+
+		for i := 0; i < numWriters; i++ {
+			go parallelWriter(r, "test", "123", iterations, wait, done)
+		}
+
+		close(wait)
+
+		for i := 0; i < numReaders+numWriters; i++ {
+			<-done
+		}
+
+	}
+
+}
+
+func BenchmarkMutexSameReadWrite1(b *testing.B) {
+	benchmarkMutex(b, 1, 1, 32)
+}
+func BenchmarkMutexSameReadWrite2(b *testing.B) {
+	benchmarkMutex(b, 2, 2, 32)
+}
+func BenchmarkMutexSameReadWrite4(b *testing.B) {
+	benchmarkMutex(b, 4, 4, 32)
+}
+func BenchmarkMutex1(b *testing.B) {
+	benchmarkMutex(b, 2, 8, 32)
+}
+func BenchmarkMutex2(b *testing.B) {
+	benchmarkMutex(b, 16, 4, 64)
+}
+func BenchmarkMutex3(b *testing.B) {
+	benchmarkMutex(b, 1, 2, 128)
+}
+func BenchmarkMutex4(b *testing.B) {
+	benchmarkMutex(b, 128, 32, 256)
+}
+func BenchmarkMutex5(b *testing.B) {
+	benchmarkMutex(b, 1024, 2048, 64)
+}
+func BenchmarkMutex6(b *testing.B) {
+	benchmarkMutex(b, 2048, 1024, 512)
+}

vendor/src/github.com/gorilla/context/doc.go

@@ -0,0 +1,82 @@
+// Copyright 2012 The Gorilla 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 context stores values shared during a request lifetime.
+
+For example, a router can set variables extracted from the URL and later
+application handlers can access those values, or it can be used to store
+sessions values to be saved at the end of a request. There are several
+others common uses.
+
+The idea was posted by Brad Fitzpatrick to the go-nuts mailing list:
+
+	http://groups.google.com/group/golang-nuts/msg/e2d679d303aa5d53
+
+Here's the basic usage: first define the keys that you will need. The key
+type is interface{} so a key can be of any type that supports equality.
+Here we define a key using a custom int type to avoid name collisions:
+
+	package foo
+
+	import (
+		"github.com/gorilla/context"
+	)
+
+	type key int
+
+	const MyKey key = 0
+
+Then set a variable. Variables are bound to an http.Request object, so you
+need a request instance to set a value:
+
+	context.Set(r, MyKey, "bar")
+
+The application can later access the variable using the same key you provided:
+
+	func MyHandler(w http.ResponseWriter, r *http.Request) {
+		// val is "bar".
+		val := context.Get(r, foo.MyKey)
+
+		// returns ("bar", true)
+		val, ok := context.GetOk(r, foo.MyKey)
+		// ...
+	}
+
+And that's all about the basic usage. We discuss some other ideas below.
+
+Any type can be stored in the context. To enforce a given type, make the key
+private and wrap Get() and Set() to accept and return values of a specific
+type:
+
+	type key int
+
+	const mykey key = 0
+
+	// GetMyKey returns a value for this package from the request values.
+	func GetMyKey(r *http.Request) SomeType {
+		if rv := context.Get(r, mykey); rv != nil {
+			return rv.(SomeType)
+		}
+		return nil
+	}
+
+	// SetMyKey sets a value for this package in the request values.
+	func SetMyKey(r *http.Request, val SomeType) {
+		context.Set(r, mykey, val)
+	}
+
+Variables must be cleared at the end of a request, to remove all values
+that were stored. This can be done in an http.Handler, after a request was
+served. Just call Clear() passing the request:
+
+	context.Clear(r)
+
+...or use ClearHandler(), which conveniently wraps an http.Handler to clear
+variables at the end of a request lifetime.
+
+The Routers from the packages gorilla/mux and gorilla/pat call Clear()
+so if you are using either of them you don't need to clear the context manually.
+*/
+package context

vendor/src/github.com/gorilla/mux/LICENSE

@@ -0,0 +1,27 @@
+Copyright (c) 2012 Rodrigo Moraes. 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.

vendor/src/github.com/gorilla/mux/README.md

@@ -0,0 +1,7 @@
+mux
+===
+[![Build Status](https://travis-ci.org/gorilla/mux.png?branch=master)](https://travis-ci.org/gorilla/mux)
+
+gorilla/mux is a powerful URL router and dispatcher.
+
+Read the full documentation here: http://www.gorillatoolkit.org/pkg/mux