137 lines
3.6 KiB
Go
137 lines
3.6 KiB
Go
package h2quic
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import (
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"crypto/tls"
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"errors"
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"fmt"
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"net/http"
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"strings"
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"sync"
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"golang.org/x/net/lex/httplex"
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)
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type h2quicClient interface {
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Dial() error
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Do(*http.Request) (*http.Response, error)
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}
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// QuicRoundTripper implements the http.RoundTripper interface
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type QuicRoundTripper struct {
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mutex sync.Mutex
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// DisableCompression, if true, prevents the Transport from
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// requesting compression with an "Accept-Encoding: gzip"
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// request header when the Request contains no existing
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// Accept-Encoding value. If the Transport requests gzip on
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// its own and gets a gzipped response, it's transparently
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// decoded in the Response.Body. However, if the user
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// explicitly requested gzip it is not automatically
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// uncompressed.
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DisableCompression bool
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// TLSClientConfig specifies the TLS configuration to use with
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// tls.Client. If nil, the default configuration is used.
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TLSClientConfig *tls.Config
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clients map[string]h2quicClient
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}
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var _ http.RoundTripper = &QuicRoundTripper{}
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// RoundTrip does a round trip
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func (r *QuicRoundTripper) RoundTrip(req *http.Request) (*http.Response, error) {
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if req.URL == nil {
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closeRequestBody(req)
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return nil, errors.New("quic: nil Request.URL")
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}
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if req.URL.Host == "" {
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closeRequestBody(req)
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return nil, errors.New("quic: no Host in request URL")
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}
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if req.Header == nil {
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closeRequestBody(req)
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return nil, errors.New("quic: nil Request.Header")
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}
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if req.URL.Scheme == "https" {
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for k, vv := range req.Header {
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if !httplex.ValidHeaderFieldName(k) {
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return nil, fmt.Errorf("quic: invalid http header field name %q", k)
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}
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for _, v := range vv {
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if !httplex.ValidHeaderFieldValue(v) {
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return nil, fmt.Errorf("quic: invalid http header field value %q for key %v", v, k)
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}
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}
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}
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} else {
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closeRequestBody(req)
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return nil, fmt.Errorf("quic: unsupported protocol scheme: %s", req.URL.Scheme)
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}
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if req.Method != "" && !validMethod(req.Method) {
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closeRequestBody(req)
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return nil, fmt.Errorf("quic: invalid method %q", req.Method)
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}
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hostname := authorityAddr("https", hostnameFromRequest(req))
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client, err := r.getClient(hostname)
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if err != nil {
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return nil, err
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}
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return client.Do(req)
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}
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func (r *QuicRoundTripper) getClient(hostname string) (h2quicClient, error) {
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r.mutex.Lock()
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defer r.mutex.Unlock()
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if r.clients == nil {
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r.clients = make(map[string]h2quicClient)
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}
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client, ok := r.clients[hostname]
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if !ok {
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client = NewClient(r, r.TLSClientConfig, hostname)
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err := client.Dial()
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if err != nil {
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return nil, err
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}
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r.clients[hostname] = client
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}
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return client, nil
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}
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func (r *QuicRoundTripper) disableCompression() bool {
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return r.DisableCompression
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}
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func closeRequestBody(req *http.Request) {
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if req.Body != nil {
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req.Body.Close()
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}
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}
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func validMethod(method string) bool {
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/*
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Method = "OPTIONS" ; Section 9.2
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| "GET" ; Section 9.3
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| "HEAD" ; Section 9.4
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| "POST" ; Section 9.5
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| "PUT" ; Section 9.6
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| "DELETE" ; Section 9.7
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| "TRACE" ; Section 9.8
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| "CONNECT" ; Section 9.9
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| extension-method
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extension-method = token
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token = 1*<any CHAR except CTLs or separators>
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*/
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return len(method) > 0 && strings.IndexFunc(method, isNotToken) == -1
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}
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// copied from net/http/http.go
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func isNotToken(r rune) bool {
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return !httplex.IsTokenRune(r)
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}
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