pax_global_header00006660000000000000000000000064135303611130014506gustar00rootroot0000000000000052 comment=c3e18be99d19e6b3e8f1559eea2c161a665c4b6b websocket-1.4.1/000077500000000000000000000000001353036111300134775ustar00rootroot00000000000000websocket-1.4.1/.circleci/000077500000000000000000000000001353036111300153325ustar00rootroot00000000000000websocket-1.4.1/.circleci/config.yml000066400000000000000000000030101353036111300173140ustar00rootroot00000000000000version: 2.0 jobs: # Base test configuration for Go library tests Each distinct version should # inherit this base, and override (at least) the container image used. "test": &test docker: - image: circleci/golang:latest working_directory: /go/src/github.com/gorilla/websocket steps: &steps - checkout - run: go version - run: go get -t -v ./... # Only run gofmt, vet & lint against the latest Go version - run: > if [[ "$LATEST" = true ]]; then go get -u golang.org/x/lint/golint golint ./... fi - run: > if [[ "$LATEST" = true ]]; then diff -u <(echo -n) <(gofmt -d .) fi - run: > if [[ "$LATEST" = true ]]; then go vet -v . fi - run: if [[ "$LATEST" = true ]]; then go vet -v .; fi - run: go test -v -race ./... "latest": <<: *test environment: LATEST: true "1.12": <<: *test docker: - image: circleci/golang:1.12 "1.11": <<: *test docker: - image: circleci/golang:1.11 "1.10": <<: *test docker: - image: circleci/golang:1.10 "1.9": <<: *test docker: - image: circleci/golang:1.9 "1.8": <<: *test docker: - image: circleci/golang:1.8 "1.7": <<: *test docker: - image: circleci/golang:1.7 workflows: version: 2 build: jobs: - "latest" - "1.12" - "1.11" - "1.10" - "1.9" - "1.8" - "1.7" websocket-1.4.1/.github/000077500000000000000000000000001353036111300150375ustar00rootroot00000000000000websocket-1.4.1/.github/release-drafter.yml000066400000000000000000000001751353036111300206320ustar00rootroot00000000000000# Config for https://github.com/apps/release-drafter template: | ## CHANGELOG $CHANGES websocket-1.4.1/.gitignore000066400000000000000000000004121353036111300154640ustar00rootroot00000000000000# Compiled Object files, Static and Dynamic libs (Shared Objects) *.o *.a *.so # Folders _obj _test # Architecture specific extensions/prefixes *.[568vq] [568vq].out *.cgo1.go *.cgo2.c _cgo_defun.c _cgo_gotypes.go _cgo_export.* _testmain.go *.exe .idea/ *.iml websocket-1.4.1/AUTHORS000066400000000000000000000003521353036111300145470ustar00rootroot00000000000000# This is the official list of Gorilla WebSocket authors for copyright # purposes. # # Please keep the list sorted. Gary Burd Google LLC (https://opensource.google.com/) Joachim Bauch websocket-1.4.1/LICENSE000066400000000000000000000024401353036111300145040ustar00rootroot00000000000000Copyright (c) 2013 The Gorilla WebSocket Authors. 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. 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 HOLDER 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. websocket-1.4.1/README.md000066400000000000000000000075661353036111300147740ustar00rootroot00000000000000# Gorilla WebSocket [![GoDoc](https://godoc.org/github.com/gorilla/websocket?status.svg)](https://godoc.org/github.com/gorilla/websocket) [![CircleCI](https://circleci.com/gh/gorilla/websocket.svg?style=svg)](https://circleci.com/gh/gorilla/websocket) Gorilla WebSocket is a [Go](http://golang.org/) implementation of the [WebSocket](http://www.rfc-editor.org/rfc/rfc6455.txt) protocol. ### Documentation * [API Reference](http://godoc.org/github.com/gorilla/websocket) * [Chat example](https://github.com/gorilla/websocket/tree/master/examples/chat) * [Command example](https://github.com/gorilla/websocket/tree/master/examples/command) * [Client and server example](https://github.com/gorilla/websocket/tree/master/examples/echo) * [File watch example](https://github.com/gorilla/websocket/tree/master/examples/filewatch) ### Status The Gorilla WebSocket package provides a complete and tested implementation of the [WebSocket](http://www.rfc-editor.org/rfc/rfc6455.txt) protocol. The package API is stable. ### Installation go get github.com/gorilla/websocket ### Protocol Compliance The Gorilla WebSocket package passes the server tests in the [Autobahn Test Suite](https://github.com/crossbario/autobahn-testsuite) using the application in the [examples/autobahn subdirectory](https://github.com/gorilla/websocket/tree/master/examples/autobahn). ### Gorilla WebSocket compared with other packages
github.com/gorilla golang.org/x/net
RFC 6455 Features
Passes Autobahn Test SuiteYesNo
Receive fragmented messageYesNo, see note 1
Send close messageYesNo
Send pings and receive pongsYesNo
Get the type of a received data messageYesYes, see note 2
Other Features
Compression ExtensionsExperimentalNo
Read message using io.ReaderYesNo, see note 3
Write message using io.WriteCloserYesNo, see note 3
Notes: 1. Large messages are fragmented in [Chrome's new WebSocket implementation](http://www.ietf.org/mail-archive/web/hybi/current/msg10503.html). 2. The application can get the type of a received data message by implementing a [Codec marshal](http://godoc.org/golang.org/x/net/websocket#Codec.Marshal) function. 3. The go.net io.Reader and io.Writer operate across WebSocket frame boundaries. Read returns when the input buffer is full or a frame boundary is encountered. Each call to Write sends a single frame message. The Gorilla io.Reader and io.WriteCloser operate on a single WebSocket message. websocket-1.4.1/client.go000066400000000000000000000264761353036111300153230ustar00rootroot00000000000000// Copyright 2013 The Gorilla WebSocket 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 websocket import ( "bytes" "context" "crypto/tls" "errors" "io" "io/ioutil" "net" "net/http" "net/http/httptrace" "net/url" "strings" "time" ) // ErrBadHandshake is returned when the server response to opening handshake is // invalid. var ErrBadHandshake = errors.New("websocket: bad handshake") var errInvalidCompression = errors.New("websocket: invalid compression negotiation") // NewClient creates a new client connection using the given net connection. // The URL u specifies the host and request URI. Use requestHeader to specify // the origin (Origin), subprotocols (Sec-WebSocket-Protocol) and cookies // (Cookie). Use the response.Header to get the selected subprotocol // (Sec-WebSocket-Protocol) and cookies (Set-Cookie). // // If the WebSocket handshake fails, ErrBadHandshake is returned along with a // non-nil *http.Response so that callers can handle redirects, authentication, // etc. // // Deprecated: Use Dialer instead. func NewClient(netConn net.Conn, u *url.URL, requestHeader http.Header, readBufSize, writeBufSize int) (c *Conn, response *http.Response, err error) { d := Dialer{ ReadBufferSize: readBufSize, WriteBufferSize: writeBufSize, NetDial: func(net, addr string) (net.Conn, error) { return netConn, nil }, } return d.Dial(u.String(), requestHeader) } // A Dialer contains options for connecting to WebSocket server. type Dialer struct { // NetDial specifies the dial function for creating TCP connections. If // NetDial is nil, net.Dial is used. NetDial func(network, addr string) (net.Conn, error) // NetDialContext specifies the dial function for creating TCP connections. If // NetDialContext is nil, net.DialContext is used. NetDialContext func(ctx context.Context, network, addr string) (net.Conn, error) // Proxy specifies a function to return a proxy for a given // Request. If the function returns a non-nil error, the // request is aborted with the provided error. // If Proxy is nil or returns a nil *URL, no proxy is used. Proxy func(*http.Request) (*url.URL, error) // TLSClientConfig specifies the TLS configuration to use with tls.Client. // If nil, the default configuration is used. TLSClientConfig *tls.Config // HandshakeTimeout specifies the duration for the handshake to complete. HandshakeTimeout time.Duration // ReadBufferSize and WriteBufferSize specify I/O buffer sizes in bytes. If a buffer // size is zero, then a useful default size is used. The I/O buffer sizes // do not limit the size of the messages that can be sent or received. ReadBufferSize, WriteBufferSize int // WriteBufferPool is a pool of buffers for write operations. If the value // is not set, then write buffers are allocated to the connection for the // lifetime of the connection. // // A pool is most useful when the application has a modest volume of writes // across a large number of connections. // // Applications should use a single pool for each unique value of // WriteBufferSize. WriteBufferPool BufferPool // Subprotocols specifies the client's requested subprotocols. Subprotocols []string // EnableCompression specifies if the client should attempt to negotiate // per message compression (RFC 7692). Setting this value to true does not // guarantee that compression will be supported. Currently only "no context // takeover" modes are supported. EnableCompression bool // Jar specifies the cookie jar. // If Jar is nil, cookies are not sent in requests and ignored // in responses. Jar http.CookieJar } // Dial creates a new client connection by calling DialContext with a background context. func (d *Dialer) Dial(urlStr string, requestHeader http.Header) (*Conn, *http.Response, error) { return d.DialContext(context.Background(), urlStr, requestHeader) } var errMalformedURL = errors.New("malformed ws or wss URL") func hostPortNoPort(u *url.URL) (hostPort, hostNoPort string) { hostPort = u.Host hostNoPort = u.Host if i := strings.LastIndex(u.Host, ":"); i > strings.LastIndex(u.Host, "]") { hostNoPort = hostNoPort[:i] } else { switch u.Scheme { case "wss": hostPort += ":443" case "https": hostPort += ":443" default: hostPort += ":80" } } return hostPort, hostNoPort } // DefaultDialer is a dialer with all fields set to the default values. var DefaultDialer = &Dialer{ Proxy: http.ProxyFromEnvironment, HandshakeTimeout: 45 * time.Second, } // nilDialer is dialer to use when receiver is nil. var nilDialer = *DefaultDialer // DialContext creates a new client connection. Use requestHeader to specify the // origin (Origin), subprotocols (Sec-WebSocket-Protocol) and cookies (Cookie). // Use the response.Header to get the selected subprotocol // (Sec-WebSocket-Protocol) and cookies (Set-Cookie). // // The context will be used in the request and in the Dialer. // // If the WebSocket handshake fails, ErrBadHandshake is returned along with a // non-nil *http.Response so that callers can handle redirects, authentication, // etcetera. The response body may not contain the entire response and does not // need to be closed by the application. func (d *Dialer) DialContext(ctx context.Context, urlStr string, requestHeader http.Header) (*Conn, *http.Response, error) { if d == nil { d = &nilDialer } challengeKey, err := generateChallengeKey() if err != nil { return nil, nil, err } u, err := url.Parse(urlStr) if err != nil { return nil, nil, err } switch u.Scheme { case "ws": u.Scheme = "http" case "wss": u.Scheme = "https" default: return nil, nil, errMalformedURL } if u.User != nil { // User name and password are not allowed in websocket URIs. return nil, nil, errMalformedURL } req := &http.Request{ Method: "GET", URL: u, Proto: "HTTP/1.1", ProtoMajor: 1, ProtoMinor: 1, Header: make(http.Header), Host: u.Host, } req = req.WithContext(ctx) // Set the cookies present in the cookie jar of the dialer if d.Jar != nil { for _, cookie := range d.Jar.Cookies(u) { req.AddCookie(cookie) } } // Set the request headers using the capitalization for names and values in // RFC examples. Although the capitalization shouldn't matter, there are // servers that depend on it. The Header.Set method is not used because the // method canonicalizes the header names. req.Header["Upgrade"] = []string{"websocket"} req.Header["Connection"] = []string{"Upgrade"} req.Header["Sec-WebSocket-Key"] = []string{challengeKey} req.Header["Sec-WebSocket-Version"] = []string{"13"} if len(d.Subprotocols) > 0 { req.Header["Sec-WebSocket-Protocol"] = []string{strings.Join(d.Subprotocols, ", ")} } for k, vs := range requestHeader { switch { case k == "Host": if len(vs) > 0 { req.Host = vs[0] } case k == "Upgrade" || k == "Connection" || k == "Sec-Websocket-Key" || k == "Sec-Websocket-Version" || k == "Sec-Websocket-Extensions" || (k == "Sec-Websocket-Protocol" && len(d.Subprotocols) > 0): return nil, nil, errors.New("websocket: duplicate header not allowed: " + k) case k == "Sec-Websocket-Protocol": req.Header["Sec-WebSocket-Protocol"] = vs default: req.Header[k] = vs } } if d.EnableCompression { req.Header["Sec-WebSocket-Extensions"] = []string{"permessage-deflate; server_no_context_takeover; client_no_context_takeover"} } if d.HandshakeTimeout != 0 { var cancel func() ctx, cancel = context.WithTimeout(ctx, d.HandshakeTimeout) defer cancel() } // Get network dial function. var netDial func(network, add string) (net.Conn, error) if d.NetDialContext != nil { netDial = func(network, addr string) (net.Conn, error) { return d.NetDialContext(ctx, network, addr) } } else if d.NetDial != nil { netDial = d.NetDial } else { netDialer := &net.Dialer{} netDial = func(network, addr string) (net.Conn, error) { return netDialer.DialContext(ctx, network, addr) } } // If needed, wrap the dial function to set the connection deadline. if deadline, ok := ctx.Deadline(); ok { forwardDial := netDial netDial = func(network, addr string) (net.Conn, error) { c, err := forwardDial(network, addr) if err != nil { return nil, err } err = c.SetDeadline(deadline) if err != nil { c.Close() return nil, err } return c, nil } } // If needed, wrap the dial function to connect through a proxy. if d.Proxy != nil { proxyURL, err := d.Proxy(req) if err != nil { return nil, nil, err } if proxyURL != nil { dialer, err := proxy_FromURL(proxyURL, netDialerFunc(netDial)) if err != nil { return nil, nil, err } netDial = dialer.Dial } } hostPort, hostNoPort := hostPortNoPort(u) trace := httptrace.ContextClientTrace(ctx) if trace != nil && trace.GetConn != nil { trace.GetConn(hostPort) } netConn, err := netDial("tcp", hostPort) if trace != nil && trace.GotConn != nil { trace.GotConn(httptrace.GotConnInfo{ Conn: netConn, }) } if err != nil { return nil, nil, err } defer func() { if netConn != nil { netConn.Close() } }() if u.Scheme == "https" { cfg := cloneTLSConfig(d.TLSClientConfig) if cfg.ServerName == "" { cfg.ServerName = hostNoPort } tlsConn := tls.Client(netConn, cfg) netConn = tlsConn var err error if trace != nil { err = doHandshakeWithTrace(trace, tlsConn, cfg) } else { err = doHandshake(tlsConn, cfg) } if err != nil { return nil, nil, err } } conn := newConn(netConn, false, d.ReadBufferSize, d.WriteBufferSize, d.WriteBufferPool, nil, nil) if err := req.Write(netConn); err != nil { return nil, nil, err } if trace != nil && trace.GotFirstResponseByte != nil { if peek, err := conn.br.Peek(1); err == nil && len(peek) == 1 { trace.GotFirstResponseByte() } } resp, err := http.ReadResponse(conn.br, req) if err != nil { return nil, nil, err } if d.Jar != nil { if rc := resp.Cookies(); len(rc) > 0 { d.Jar.SetCookies(u, rc) } } if resp.StatusCode != 101 || !strings.EqualFold(resp.Header.Get("Upgrade"), "websocket") || !strings.EqualFold(resp.Header.Get("Connection"), "upgrade") || resp.Header.Get("Sec-Websocket-Accept") != computeAcceptKey(challengeKey) { // Before closing the network connection on return from this // function, slurp up some of the response to aid application // debugging. buf := make([]byte, 1024) n, _ := io.ReadFull(resp.Body, buf) resp.Body = ioutil.NopCloser(bytes.NewReader(buf[:n])) return nil, resp, ErrBadHandshake } for _, ext := range parseExtensions(resp.Header) { if ext[""] != "permessage-deflate" { continue } _, snct := ext["server_no_context_takeover"] _, cnct := ext["client_no_context_takeover"] if !snct || !cnct { return nil, resp, errInvalidCompression } conn.newCompressionWriter = compressNoContextTakeover conn.newDecompressionReader = decompressNoContextTakeover break } resp.Body = ioutil.NopCloser(bytes.NewReader([]byte{})) conn.subprotocol = resp.Header.Get("Sec-Websocket-Protocol") netConn.SetDeadline(time.Time{}) netConn = nil // to avoid close in defer. return conn, resp, nil } func doHandshake(tlsConn *tls.Conn, cfg *tls.Config) error { if err := tlsConn.Handshake(); err != nil { return err } if !cfg.InsecureSkipVerify { if err := tlsConn.VerifyHostname(cfg.ServerName); err != nil { return err } } return nil } websocket-1.4.1/client_clone.go000066400000000000000000000005341353036111300164660ustar00rootroot00000000000000// Copyright 2013 The Gorilla WebSocket Authors. All rights reserved. // Use of this source code is governed by a BSD-style // license that can be found in the LICENSE file. // +build go1.8 package websocket import "crypto/tls" func cloneTLSConfig(cfg *tls.Config) *tls.Config { if cfg == nil { return &tls.Config{} } return cfg.Clone() } websocket-1.4.1/client_clone_legacy.go000066400000000000000000000025331353036111300200130ustar00rootroot00000000000000// Copyright 2013 The Gorilla WebSocket Authors. All rights reserved. // Use of this source code is governed by a BSD-style // license that can be found in the LICENSE file. // +build !go1.8 package websocket import "crypto/tls" // cloneTLSConfig clones all public fields except the fields // SessionTicketsDisabled and SessionTicketKey. This avoids copying the // sync.Mutex in the sync.Once and makes it safe to call cloneTLSConfig on a // config in active use. func cloneTLSConfig(cfg *tls.Config) *tls.Config { if cfg == nil { return &tls.Config{} } return &tls.Config{ Rand: cfg.Rand, Time: cfg.Time, Certificates: cfg.Certificates, NameToCertificate: cfg.NameToCertificate, GetCertificate: cfg.GetCertificate, RootCAs: cfg.RootCAs, NextProtos: cfg.NextProtos, ServerName: cfg.ServerName, ClientAuth: cfg.ClientAuth, ClientCAs: cfg.ClientCAs, InsecureSkipVerify: cfg.InsecureSkipVerify, CipherSuites: cfg.CipherSuites, PreferServerCipherSuites: cfg.PreferServerCipherSuites, ClientSessionCache: cfg.ClientSessionCache, MinVersion: cfg.MinVersion, MaxVersion: cfg.MaxVersion, CurvePreferences: cfg.CurvePreferences, } } websocket-1.4.1/client_server_test.go000066400000000000000000000512771353036111300177450ustar00rootroot00000000000000// Copyright 2013 The Gorilla WebSocket 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 websocket import ( "bytes" "context" "crypto/tls" "crypto/x509" "encoding/base64" "encoding/binary" "fmt" "io" "io/ioutil" "log" "net" "net/http" "net/http/cookiejar" "net/http/httptest" "net/http/httptrace" "net/url" "reflect" "strings" "testing" "time" ) var cstUpgrader = Upgrader{ Subprotocols: []string{"p0", "p1"}, ReadBufferSize: 1024, WriteBufferSize: 1024, EnableCompression: true, Error: func(w http.ResponseWriter, r *http.Request, status int, reason error) { http.Error(w, reason.Error(), status) }, } var cstDialer = Dialer{ Subprotocols: []string{"p1", "p2"}, ReadBufferSize: 1024, WriteBufferSize: 1024, HandshakeTimeout: 30 * time.Second, } type cstHandler struct{ *testing.T } type cstServer struct { *httptest.Server URL string t *testing.T } const ( cstPath = "/a/b" cstRawQuery = "x=y" cstRequestURI = cstPath + "?" + cstRawQuery ) func newServer(t *testing.T) *cstServer { var s cstServer s.Server = httptest.NewServer(cstHandler{t}) s.Server.URL += cstRequestURI s.URL = makeWsProto(s.Server.URL) return &s } func newTLSServer(t *testing.T) *cstServer { var s cstServer s.Server = httptest.NewTLSServer(cstHandler{t}) s.Server.URL += cstRequestURI s.URL = makeWsProto(s.Server.URL) return &s } func (t cstHandler) ServeHTTP(w http.ResponseWriter, r *http.Request) { if r.URL.Path != cstPath { t.Logf("path=%v, want %v", r.URL.Path, cstPath) http.Error(w, "bad path", http.StatusBadRequest) return } if r.URL.RawQuery != cstRawQuery { t.Logf("query=%v, want %v", r.URL.RawQuery, cstRawQuery) http.Error(w, "bad path", http.StatusBadRequest) return } subprotos := Subprotocols(r) if !reflect.DeepEqual(subprotos, cstDialer.Subprotocols) { t.Logf("subprotols=%v, want %v", subprotos, cstDialer.Subprotocols) http.Error(w, "bad protocol", http.StatusBadRequest) return } ws, err := cstUpgrader.Upgrade(w, r, http.Header{"Set-Cookie": {"sessionID=1234"}}) if err != nil { t.Logf("Upgrade: %v", err) return } defer ws.Close() if ws.Subprotocol() != "p1" { t.Logf("Subprotocol() = %s, want p1", ws.Subprotocol()) ws.Close() return } op, rd, err := ws.NextReader() if err != nil { t.Logf("NextReader: %v", err) return } wr, err := ws.NextWriter(op) if err != nil { t.Logf("NextWriter: %v", err) return } if _, err = io.Copy(wr, rd); err != nil { t.Logf("NextWriter: %v", err) return } if err := wr.Close(); err != nil { t.Logf("Close: %v", err) return } } func makeWsProto(s string) string { return "ws" + strings.TrimPrefix(s, "http") } func sendRecv(t *testing.T, ws *Conn) { const message = "Hello World!" if err := ws.SetWriteDeadline(time.Now().Add(time.Second)); err != nil { t.Fatalf("SetWriteDeadline: %v", err) } if err := ws.WriteMessage(TextMessage, []byte(message)); err != nil { t.Fatalf("WriteMessage: %v", err) } if err := ws.SetReadDeadline(time.Now().Add(time.Second)); err != nil { t.Fatalf("SetReadDeadline: %v", err) } _, p, err := ws.ReadMessage() if err != nil { t.Fatalf("ReadMessage: %v", err) } if string(p) != message { t.Fatalf("message=%s, want %s", p, message) } } func TestProxyDial(t *testing.T) { s := newServer(t) defer s.Close() surl, _ := url.Parse(s.Server.URL) cstDialer := cstDialer // make local copy for modification on next line. cstDialer.Proxy = http.ProxyURL(surl) connect := false origHandler := s.Server.Config.Handler // Capture the request Host header. s.Server.Config.Handler = http.HandlerFunc( func(w http.ResponseWriter, r *http.Request) { if r.Method == "CONNECT" { connect = true w.WriteHeader(http.StatusOK) return } if !connect { t.Log("connect not received") http.Error(w, "connect not received", http.StatusMethodNotAllowed) return } origHandler.ServeHTTP(w, r) }) ws, _, err := cstDialer.Dial(s.URL, nil) if err != nil { t.Fatalf("Dial: %v", err) } defer ws.Close() sendRecv(t, ws) } func TestProxyAuthorizationDial(t *testing.T) { s := newServer(t) defer s.Close() surl, _ := url.Parse(s.Server.URL) surl.User = url.UserPassword("username", "password") cstDialer := cstDialer // make local copy for modification on next line. cstDialer.Proxy = http.ProxyURL(surl) connect := false origHandler := s.Server.Config.Handler // Capture the request Host header. s.Server.Config.Handler = http.HandlerFunc( func(w http.ResponseWriter, r *http.Request) { proxyAuth := r.Header.Get("Proxy-Authorization") expectedProxyAuth := "Basic " + base64.StdEncoding.EncodeToString([]byte("username:password")) if r.Method == "CONNECT" && proxyAuth == expectedProxyAuth { connect = true w.WriteHeader(http.StatusOK) return } if !connect { t.Log("connect with proxy authorization not received") http.Error(w, "connect with proxy authorization not received", http.StatusMethodNotAllowed) return } origHandler.ServeHTTP(w, r) }) ws, _, err := cstDialer.Dial(s.URL, nil) if err != nil { t.Fatalf("Dial: %v", err) } defer ws.Close() sendRecv(t, ws) } func TestDial(t *testing.T) { s := newServer(t) defer s.Close() ws, _, err := cstDialer.Dial(s.URL, nil) if err != nil { t.Fatalf("Dial: %v", err) } defer ws.Close() sendRecv(t, ws) } func TestDialCookieJar(t *testing.T) { s := newServer(t) defer s.Close() jar, _ := cookiejar.New(nil) d := cstDialer d.Jar = jar u, _ := url.Parse(s.URL) switch u.Scheme { case "ws": u.Scheme = "http" case "wss": u.Scheme = "https" } cookies := []*http.Cookie{{Name: "gorilla", Value: "ws", Path: "/"}} d.Jar.SetCookies(u, cookies) ws, _, err := d.Dial(s.URL, nil) if err != nil { t.Fatalf("Dial: %v", err) } defer ws.Close() var gorilla string var sessionID string for _, c := range d.Jar.Cookies(u) { if c.Name == "gorilla" { gorilla = c.Value } if c.Name == "sessionID" { sessionID = c.Value } } if gorilla != "ws" { t.Error("Cookie not present in jar.") } if sessionID != "1234" { t.Error("Set-Cookie not received from the server.") } sendRecv(t, ws) } func rootCAs(t *testing.T, s *httptest.Server) *x509.CertPool { certs := x509.NewCertPool() for _, c := range s.TLS.Certificates { roots, err := x509.ParseCertificates(c.Certificate[len(c.Certificate)-1]) if err != nil { t.Fatalf("error parsing server's root cert: %v", err) } for _, root := range roots { certs.AddCert(root) } } return certs } func TestDialTLS(t *testing.T) { s := newTLSServer(t) defer s.Close() d := cstDialer d.TLSClientConfig = &tls.Config{RootCAs: rootCAs(t, s.Server)} ws, _, err := d.Dial(s.URL, nil) if err != nil { t.Fatalf("Dial: %v", err) } defer ws.Close() sendRecv(t, ws) } func TestDialTimeout(t *testing.T) { s := newServer(t) defer s.Close() d := cstDialer d.HandshakeTimeout = -1 ws, _, err := d.Dial(s.URL, nil) if err == nil { ws.Close() t.Fatalf("Dial: nil") } } // requireDeadlineNetConn fails the current test when Read or Write are called // with no deadline. type requireDeadlineNetConn struct { t *testing.T c net.Conn readDeadlineIsSet bool writeDeadlineIsSet bool } func (c *requireDeadlineNetConn) SetDeadline(t time.Time) error { c.writeDeadlineIsSet = !t.Equal(time.Time{}) c.readDeadlineIsSet = c.writeDeadlineIsSet return c.c.SetDeadline(t) } func (c *requireDeadlineNetConn) SetReadDeadline(t time.Time) error { c.readDeadlineIsSet = !t.Equal(time.Time{}) return c.c.SetDeadline(t) } func (c *requireDeadlineNetConn) SetWriteDeadline(t time.Time) error { c.writeDeadlineIsSet = !t.Equal(time.Time{}) return c.c.SetDeadline(t) } func (c *requireDeadlineNetConn) Write(p []byte) (int, error) { if !c.writeDeadlineIsSet { c.t.Fatalf("write with no deadline") } return c.c.Write(p) } func (c *requireDeadlineNetConn) Read(p []byte) (int, error) { if !c.readDeadlineIsSet { c.t.Fatalf("read with no deadline") } return c.c.Read(p) } func (c *requireDeadlineNetConn) Close() error { return c.c.Close() } func (c *requireDeadlineNetConn) LocalAddr() net.Addr { return c.c.LocalAddr() } func (c *requireDeadlineNetConn) RemoteAddr() net.Addr { return c.c.RemoteAddr() } func TestHandshakeTimeout(t *testing.T) { s := newServer(t) defer s.Close() d := cstDialer d.NetDial = func(n, a string) (net.Conn, error) { c, err := net.Dial(n, a) return &requireDeadlineNetConn{c: c, t: t}, err } ws, _, err := d.Dial(s.URL, nil) if err != nil { t.Fatal("Dial:", err) } ws.Close() } func TestHandshakeTimeoutInContext(t *testing.T) { s := newServer(t) defer s.Close() d := cstDialer d.HandshakeTimeout = 0 d.NetDialContext = func(ctx context.Context, n, a string) (net.Conn, error) { netDialer := &net.Dialer{} c, err := netDialer.DialContext(ctx, n, a) return &requireDeadlineNetConn{c: c, t: t}, err } ctx, cancel := context.WithDeadline(context.Background(), time.Now().Add(30*time.Second)) defer cancel() ws, _, err := d.DialContext(ctx, s.URL, nil) if err != nil { t.Fatal("Dial:", err) } ws.Close() } func TestDialBadScheme(t *testing.T) { s := newServer(t) defer s.Close() ws, _, err := cstDialer.Dial(s.Server.URL, nil) if err == nil { ws.Close() t.Fatalf("Dial: nil") } } func TestDialBadOrigin(t *testing.T) { s := newServer(t) defer s.Close() ws, resp, err := cstDialer.Dial(s.URL, http.Header{"Origin": {"bad"}}) if err == nil { ws.Close() t.Fatalf("Dial: nil") } if resp == nil { t.Fatalf("resp=nil, err=%v", err) } if resp.StatusCode != http.StatusForbidden { t.Fatalf("status=%d, want %d", resp.StatusCode, http.StatusForbidden) } } func TestDialBadHeader(t *testing.T) { s := newServer(t) defer s.Close() for _, k := range []string{"Upgrade", "Connection", "Sec-Websocket-Key", "Sec-Websocket-Version", "Sec-Websocket-Protocol"} { h := http.Header{} h.Set(k, "bad") ws, _, err := cstDialer.Dial(s.URL, http.Header{"Origin": {"bad"}}) if err == nil { ws.Close() t.Errorf("Dial with header %s returned nil", k) } } } func TestBadMethod(t *testing.T) { s := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) { ws, err := cstUpgrader.Upgrade(w, r, nil) if err == nil { t.Errorf("handshake succeeded, expect fail") ws.Close() } })) defer s.Close() req, err := http.NewRequest("POST", s.URL, strings.NewReader("")) if err != nil { t.Fatalf("NewRequest returned error %v", err) } req.Header.Set("Connection", "upgrade") req.Header.Set("Upgrade", "websocket") req.Header.Set("Sec-Websocket-Version", "13") resp, err := http.DefaultClient.Do(req) if err != nil { t.Fatalf("Do returned error %v", err) } resp.Body.Close() if resp.StatusCode != http.StatusMethodNotAllowed { t.Errorf("Status = %d, want %d", resp.StatusCode, http.StatusMethodNotAllowed) } } func TestHandshake(t *testing.T) { s := newServer(t) defer s.Close() ws, resp, err := cstDialer.Dial(s.URL, http.Header{"Origin": {s.URL}}) if err != nil { t.Fatalf("Dial: %v", err) } defer ws.Close() var sessionID string for _, c := range resp.Cookies() { if c.Name == "sessionID" { sessionID = c.Value } } if sessionID != "1234" { t.Error("Set-Cookie not received from the server.") } if ws.Subprotocol() != "p1" { t.Errorf("ws.Subprotocol() = %s, want p1", ws.Subprotocol()) } sendRecv(t, ws) } func TestRespOnBadHandshake(t *testing.T) { const expectedStatus = http.StatusGone const expectedBody = "This is the response body." s := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) { w.WriteHeader(expectedStatus) io.WriteString(w, expectedBody) })) defer s.Close() ws, resp, err := cstDialer.Dial(makeWsProto(s.URL), nil) if err == nil { ws.Close() t.Fatalf("Dial: nil") } if resp == nil { t.Fatalf("resp=nil, err=%v", err) } if resp.StatusCode != expectedStatus { t.Errorf("resp.StatusCode=%d, want %d", resp.StatusCode, expectedStatus) } p, err := ioutil.ReadAll(resp.Body) if err != nil { t.Fatalf("ReadFull(resp.Body) returned error %v", err) } if string(p) != expectedBody { t.Errorf("resp.Body=%s, want %s", p, expectedBody) } } type testLogWriter struct { t *testing.T } func (w testLogWriter) Write(p []byte) (int, error) { w.t.Logf("%s", p) return len(p), nil } // TestHost tests handling of host names and confirms that it matches net/http. func TestHost(t *testing.T) { upgrader := Upgrader{} handler := http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) { if IsWebSocketUpgrade(r) { c, err := upgrader.Upgrade(w, r, http.Header{"X-Test-Host": {r.Host}}) if err != nil { t.Fatal(err) } c.Close() } else { w.Header().Set("X-Test-Host", r.Host) } }) server := httptest.NewServer(handler) defer server.Close() tlsServer := httptest.NewTLSServer(handler) defer tlsServer.Close() addrs := map[*httptest.Server]string{server: server.Listener.Addr().String(), tlsServer: tlsServer.Listener.Addr().String()} wsProtos := map[*httptest.Server]string{server: "ws://", tlsServer: "wss://"} httpProtos := map[*httptest.Server]string{server: "http://", tlsServer: "https://"} // Avoid log noise from net/http server by logging to testing.T server.Config.ErrorLog = log.New(testLogWriter{t}, "", 0) tlsServer.Config.ErrorLog = server.Config.ErrorLog cas := rootCAs(t, tlsServer) tests := []struct { fail bool // true if dial / get should fail server *httptest.Server // server to use url string // host for request URI header string // optional request host header tls string // optiona host for tls ServerName wantAddr string // expected host for dial wantHeader string // expected request header on server insecureSkipVerify bool }{ { server: server, url: addrs[server], wantAddr: addrs[server], wantHeader: addrs[server], }, { server: tlsServer, url: addrs[tlsServer], wantAddr: addrs[tlsServer], wantHeader: addrs[tlsServer], }, { server: server, url: addrs[server], header: "badhost.com", wantAddr: addrs[server], wantHeader: "badhost.com", }, { server: tlsServer, url: addrs[tlsServer], header: "badhost.com", wantAddr: addrs[tlsServer], wantHeader: "badhost.com", }, { server: server, url: "example.com", header: "badhost.com", wantAddr: "example.com:80", wantHeader: "badhost.com", }, { server: tlsServer, url: "example.com", header: "badhost.com", wantAddr: "example.com:443", wantHeader: "badhost.com", }, { server: server, url: "badhost.com", header: "example.com", wantAddr: "badhost.com:80", wantHeader: "example.com", }, { fail: true, server: tlsServer, url: "badhost.com", header: "example.com", wantAddr: "badhost.com:443", }, { server: tlsServer, url: "badhost.com", insecureSkipVerify: true, wantAddr: "badhost.com:443", wantHeader: "badhost.com", }, { server: tlsServer, url: "badhost.com", tls: "example.com", wantAddr: "badhost.com:443", wantHeader: "badhost.com", }, } for i, tt := range tests { tls := &tls.Config{ RootCAs: cas, ServerName: tt.tls, InsecureSkipVerify: tt.insecureSkipVerify, } var gotAddr string dialer := Dialer{ NetDial: func(network, addr string) (net.Conn, error) { gotAddr = addr return net.Dial(network, addrs[tt.server]) }, TLSClientConfig: tls, } // Test websocket dial h := http.Header{} if tt.header != "" { h.Set("Host", tt.header) } c, resp, err := dialer.Dial(wsProtos[tt.server]+tt.url+"/", h) if err == nil { c.Close() } check := func(protos map[*httptest.Server]string) { name := fmt.Sprintf("%d: %s%s/ header[Host]=%q, tls.ServerName=%q", i+1, protos[tt.server], tt.url, tt.header, tt.tls) if gotAddr != tt.wantAddr { t.Errorf("%s: got addr %s, want %s", name, gotAddr, tt.wantAddr) } switch { case tt.fail && err == nil: t.Errorf("%s: unexpected success", name) case !tt.fail && err != nil: t.Errorf("%s: unexpected error %v", name, err) case !tt.fail && err == nil: if gotHost := resp.Header.Get("X-Test-Host"); gotHost != tt.wantHeader { t.Errorf("%s: got host %s, want %s", name, gotHost, tt.wantHeader) } } } check(wsProtos) // Confirm that net/http has same result transport := &http.Transport{ Dial: dialer.NetDial, TLSClientConfig: dialer.TLSClientConfig, } req, _ := http.NewRequest("GET", httpProtos[tt.server]+tt.url+"/", nil) if tt.header != "" { req.Host = tt.header } client := &http.Client{Transport: transport} resp, err = client.Do(req) if err == nil { resp.Body.Close() } transport.CloseIdleConnections() check(httpProtos) } } func TestDialCompression(t *testing.T) { s := newServer(t) defer s.Close() dialer := cstDialer dialer.EnableCompression = true ws, _, err := dialer.Dial(s.URL, nil) if err != nil { t.Fatalf("Dial: %v", err) } defer ws.Close() sendRecv(t, ws) } func TestSocksProxyDial(t *testing.T) { s := newServer(t) defer s.Close() proxyListener, err := net.Listen("tcp", "127.0.0.1:0") if err != nil { t.Fatalf("listen failed: %v", err) } defer proxyListener.Close() go func() { c1, err := proxyListener.Accept() if err != nil { t.Errorf("proxy accept failed: %v", err) return } defer c1.Close() c1.SetDeadline(time.Now().Add(30 * time.Second)) buf := make([]byte, 32) if _, err := io.ReadFull(c1, buf[:3]); err != nil { t.Errorf("read failed: %v", err) return } if want := []byte{5, 1, 0}; !bytes.Equal(want, buf[:len(want)]) { t.Errorf("read %x, want %x", buf[:len(want)], want) } if _, err := c1.Write([]byte{5, 0}); err != nil { t.Errorf("write failed: %v", err) return } if _, err := io.ReadFull(c1, buf[:10]); err != nil { t.Errorf("read failed: %v", err) return } if want := []byte{5, 1, 0, 1}; !bytes.Equal(want, buf[:len(want)]) { t.Errorf("read %x, want %x", buf[:len(want)], want) return } buf[1] = 0 if _, err := c1.Write(buf[:10]); err != nil { t.Errorf("write failed: %v", err) return } ip := net.IP(buf[4:8]) port := binary.BigEndian.Uint16(buf[8:10]) c2, err := net.DialTCP("tcp", nil, &net.TCPAddr{IP: ip, Port: int(port)}) if err != nil { t.Errorf("dial failed; %v", err) return } defer c2.Close() done := make(chan struct{}) go func() { io.Copy(c1, c2) close(done) }() io.Copy(c2, c1) <-done }() purl, err := url.Parse("socks5://" + proxyListener.Addr().String()) if err != nil { t.Fatalf("parse failed: %v", err) } cstDialer := cstDialer // make local copy for modification on next line. cstDialer.Proxy = http.ProxyURL(purl) ws, _, err := cstDialer.Dial(s.URL, nil) if err != nil { t.Fatalf("Dial: %v", err) } defer ws.Close() sendRecv(t, ws) } func TestTracingDialWithContext(t *testing.T) { var headersWrote, requestWrote, getConn, gotConn, connectDone, gotFirstResponseByte bool trace := &httptrace.ClientTrace{ WroteHeaders: func() { headersWrote = true }, WroteRequest: func(httptrace.WroteRequestInfo) { requestWrote = true }, GetConn: func(hostPort string) { getConn = true }, GotConn: func(info httptrace.GotConnInfo) { gotConn = true }, ConnectDone: func(network, addr string, err error) { connectDone = true }, GotFirstResponseByte: func() { gotFirstResponseByte = true }, } ctx := httptrace.WithClientTrace(context.Background(), trace) s := newTLSServer(t) defer s.Close() d := cstDialer d.TLSClientConfig = &tls.Config{RootCAs: rootCAs(t, s.Server)} ws, _, err := d.DialContext(ctx, s.URL, nil) if err != nil { t.Fatalf("Dial: %v", err) } if !headersWrote { t.Fatal("Headers was not written") } if !requestWrote { t.Fatal("Request was not written") } if !getConn { t.Fatal("getConn was not called") } if !gotConn { t.Fatal("gotConn was not called") } if !connectDone { t.Fatal("connectDone was not called") } if !gotFirstResponseByte { t.Fatal("GotFirstResponseByte was not called") } defer ws.Close() sendRecv(t, ws) } func TestEmptyTracingDialWithContext(t *testing.T) { trace := &httptrace.ClientTrace{} ctx := httptrace.WithClientTrace(context.Background(), trace) s := newTLSServer(t) defer s.Close() d := cstDialer d.TLSClientConfig = &tls.Config{RootCAs: rootCAs(t, s.Server)} ws, _, err := d.DialContext(ctx, s.URL, nil) if err != nil { t.Fatalf("Dial: %v", err) } defer ws.Close() sendRecv(t, ws) } websocket-1.4.1/client_test.go000066400000000000000000000020601353036111300163410ustar00rootroot00000000000000// Copyright 2014 The Gorilla WebSocket 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 websocket import ( "net/url" "testing" ) var hostPortNoPortTests = []struct { u *url.URL hostPort, hostNoPort string }{ {&url.URL{Scheme: "ws", Host: "example.com"}, "example.com:80", "example.com"}, {&url.URL{Scheme: "wss", Host: "example.com"}, "example.com:443", "example.com"}, {&url.URL{Scheme: "ws", Host: "example.com:7777"}, "example.com:7777", "example.com"}, {&url.URL{Scheme: "wss", Host: "example.com:7777"}, "example.com:7777", "example.com"}, } func TestHostPortNoPort(t *testing.T) { for _, tt := range hostPortNoPortTests { hostPort, hostNoPort := hostPortNoPort(tt.u) if hostPort != tt.hostPort { t.Errorf("hostPortNoPort(%v) returned hostPort %q, want %q", tt.u, hostPort, tt.hostPort) } if hostNoPort != tt.hostNoPort { t.Errorf("hostPortNoPort(%v) returned hostNoPort %q, want %q", tt.u, hostNoPort, tt.hostNoPort) } } } websocket-1.4.1/compression.go000066400000000000000000000061701353036111300163730ustar00rootroot00000000000000// Copyright 2017 The Gorilla WebSocket 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 websocket import ( "compress/flate" "errors" "io" "strings" "sync" ) const ( minCompressionLevel = -2 // flate.HuffmanOnly not defined in Go < 1.6 maxCompressionLevel = flate.BestCompression defaultCompressionLevel = 1 ) var ( flateWriterPools [maxCompressionLevel - minCompressionLevel + 1]sync.Pool flateReaderPool = sync.Pool{New: func() interface{} { return flate.NewReader(nil) }} ) func decompressNoContextTakeover(r io.Reader) io.ReadCloser { const tail = // Add four bytes as specified in RFC "\x00\x00\xff\xff" + // Add final block to squelch unexpected EOF error from flate reader. "\x01\x00\x00\xff\xff" fr, _ := flateReaderPool.Get().(io.ReadCloser) fr.(flate.Resetter).Reset(io.MultiReader(r, strings.NewReader(tail)), nil) return &flateReadWrapper{fr} } func isValidCompressionLevel(level int) bool { return minCompressionLevel <= level && level <= maxCompressionLevel } func compressNoContextTakeover(w io.WriteCloser, level int) io.WriteCloser { p := &flateWriterPools[level-minCompressionLevel] tw := &truncWriter{w: w} fw, _ := p.Get().(*flate.Writer) if fw == nil { fw, _ = flate.NewWriter(tw, level) } else { fw.Reset(tw) } return &flateWriteWrapper{fw: fw, tw: tw, p: p} } // truncWriter is an io.Writer that writes all but the last four bytes of the // stream to another io.Writer. type truncWriter struct { w io.WriteCloser n int p [4]byte } func (w *truncWriter) Write(p []byte) (int, error) { n := 0 // fill buffer first for simplicity. if w.n < len(w.p) { n = copy(w.p[w.n:], p) p = p[n:] w.n += n if len(p) == 0 { return n, nil } } m := len(p) if m > len(w.p) { m = len(w.p) } if nn, err := w.w.Write(w.p[:m]); err != nil { return n + nn, err } copy(w.p[:], w.p[m:]) copy(w.p[len(w.p)-m:], p[len(p)-m:]) nn, err := w.w.Write(p[:len(p)-m]) return n + nn, err } type flateWriteWrapper struct { fw *flate.Writer tw *truncWriter p *sync.Pool } func (w *flateWriteWrapper) Write(p []byte) (int, error) { if w.fw == nil { return 0, errWriteClosed } return w.fw.Write(p) } func (w *flateWriteWrapper) Close() error { if w.fw == nil { return errWriteClosed } err1 := w.fw.Flush() w.p.Put(w.fw) w.fw = nil if w.tw.p != [4]byte{0, 0, 0xff, 0xff} { return errors.New("websocket: internal error, unexpected bytes at end of flate stream") } err2 := w.tw.w.Close() if err1 != nil { return err1 } return err2 } type flateReadWrapper struct { fr io.ReadCloser } func (r *flateReadWrapper) Read(p []byte) (int, error) { if r.fr == nil { return 0, io.ErrClosedPipe } n, err := r.fr.Read(p) if err == io.EOF { // Preemptively place the reader back in the pool. This helps with // scenarios where the application does not call NextReader() soon after // this final read. r.Close() } return n, err } func (r *flateReadWrapper) Close() error { if r.fr == nil { return io.ErrClosedPipe } err := r.fr.Close() flateReaderPool.Put(r.fr) r.fr = nil return err } websocket-1.4.1/compression_test.go000066400000000000000000000035021353036111300174260ustar00rootroot00000000000000package websocket import ( "bytes" "fmt" "io" "io/ioutil" "testing" ) type nopCloser struct{ io.Writer } func (nopCloser) Close() error { return nil } func TestTruncWriter(t *testing.T) { const data = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijlkmnopqrstuvwxyz987654321" for n := 1; n <= 10; n++ { var b bytes.Buffer w := &truncWriter{w: nopCloser{&b}} p := []byte(data) for len(p) > 0 { m := len(p) if m > n { m = n } w.Write(p[:m]) p = p[m:] } if b.String() != data[:len(data)-len(w.p)] { t.Errorf("%d: %q", n, b.String()) } } } func textMessages(num int) [][]byte { messages := make([][]byte, num) for i := 0; i < num; i++ { msg := fmt.Sprintf("planet: %d, country: %d, city: %d, street: %d", i, i, i, i) messages[i] = []byte(msg) } return messages } func BenchmarkWriteNoCompression(b *testing.B) { w := ioutil.Discard c := newTestConn(nil, w, false) messages := textMessages(100) b.ResetTimer() for i := 0; i < b.N; i++ { c.WriteMessage(TextMessage, messages[i%len(messages)]) } b.ReportAllocs() } func BenchmarkWriteWithCompression(b *testing.B) { w := ioutil.Discard c := newTestConn(nil, w, false) messages := textMessages(100) c.enableWriteCompression = true c.newCompressionWriter = compressNoContextTakeover b.ResetTimer() for i := 0; i < b.N; i++ { c.WriteMessage(TextMessage, messages[i%len(messages)]) } b.ReportAllocs() } func TestValidCompressionLevel(t *testing.T) { c := newTestConn(nil, nil, false) for _, level := range []int{minCompressionLevel - 1, maxCompressionLevel + 1} { if err := c.SetCompressionLevel(level); err == nil { t.Errorf("no error for level %d", level) } } for _, level := range []int{minCompressionLevel, maxCompressionLevel} { if err := c.SetCompressionLevel(level); err != nil { t.Errorf("error for level %d", level) } } } websocket-1.4.1/conn.go000066400000000000000000000771021353036111300147720ustar00rootroot00000000000000// Copyright 2013 The Gorilla WebSocket 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 websocket import ( "bufio" "encoding/binary" "errors" "io" "io/ioutil" "math/rand" "net" "strconv" "sync" "time" "unicode/utf8" ) const ( // Frame header byte 0 bits from Section 5.2 of RFC 6455 finalBit = 1 << 7 rsv1Bit = 1 << 6 rsv2Bit = 1 << 5 rsv3Bit = 1 << 4 // Frame header byte 1 bits from Section 5.2 of RFC 6455 maskBit = 1 << 7 maxFrameHeaderSize = 2 + 8 + 4 // Fixed header + length + mask maxControlFramePayloadSize = 125 writeWait = time.Second defaultReadBufferSize = 4096 defaultWriteBufferSize = 4096 continuationFrame = 0 noFrame = -1 ) // Close codes defined in RFC 6455, section 11.7. const ( CloseNormalClosure = 1000 CloseGoingAway = 1001 CloseProtocolError = 1002 CloseUnsupportedData = 1003 CloseNoStatusReceived = 1005 CloseAbnormalClosure = 1006 CloseInvalidFramePayloadData = 1007 ClosePolicyViolation = 1008 CloseMessageTooBig = 1009 CloseMandatoryExtension = 1010 CloseInternalServerErr = 1011 CloseServiceRestart = 1012 CloseTryAgainLater = 1013 CloseTLSHandshake = 1015 ) // The message types are defined in RFC 6455, section 11.8. const ( // TextMessage denotes a text data message. The text message payload is // interpreted as UTF-8 encoded text data. TextMessage = 1 // BinaryMessage denotes a binary data message. BinaryMessage = 2 // CloseMessage denotes a close control message. The optional message // payload contains a numeric code and text. Use the FormatCloseMessage // function to format a close message payload. CloseMessage = 8 // PingMessage denotes a ping control message. The optional message payload // is UTF-8 encoded text. PingMessage = 9 // PongMessage denotes a pong control message. The optional message payload // is UTF-8 encoded text. PongMessage = 10 ) // ErrCloseSent is returned when the application writes a message to the // connection after sending a close message. var ErrCloseSent = errors.New("websocket: close sent") // ErrReadLimit is returned when reading a message that is larger than the // read limit set for the connection. var ErrReadLimit = errors.New("websocket: read limit exceeded") // netError satisfies the net Error interface. type netError struct { msg string temporary bool timeout bool } func (e *netError) Error() string { return e.msg } func (e *netError) Temporary() bool { return e.temporary } func (e *netError) Timeout() bool { return e.timeout } // CloseError represents a close message. type CloseError struct { // Code is defined in RFC 6455, section 11.7. Code int // Text is the optional text payload. Text string } func (e *CloseError) Error() string { s := []byte("websocket: close ") s = strconv.AppendInt(s, int64(e.Code), 10) switch e.Code { case CloseNormalClosure: s = append(s, " (normal)"...) case CloseGoingAway: s = append(s, " (going away)"...) case CloseProtocolError: s = append(s, " (protocol error)"...) case CloseUnsupportedData: s = append(s, " (unsupported data)"...) case CloseNoStatusReceived: s = append(s, " (no status)"...) case CloseAbnormalClosure: s = append(s, " (abnormal closure)"...) case CloseInvalidFramePayloadData: s = append(s, " (invalid payload data)"...) case ClosePolicyViolation: s = append(s, " (policy violation)"...) case CloseMessageTooBig: s = append(s, " (message too big)"...) case CloseMandatoryExtension: s = append(s, " (mandatory extension missing)"...) case CloseInternalServerErr: s = append(s, " (internal server error)"...) case CloseTLSHandshake: s = append(s, " (TLS handshake error)"...) } if e.Text != "" { s = append(s, ": "...) s = append(s, e.Text...) } return string(s) } // IsCloseError returns boolean indicating whether the error is a *CloseError // with one of the specified codes. func IsCloseError(err error, codes ...int) bool { if e, ok := err.(*CloseError); ok { for _, code := range codes { if e.Code == code { return true } } } return false } // IsUnexpectedCloseError returns boolean indicating whether the error is a // *CloseError with a code not in the list of expected codes. func IsUnexpectedCloseError(err error, expectedCodes ...int) bool { if e, ok := err.(*CloseError); ok { for _, code := range expectedCodes { if e.Code == code { return false } } return true } return false } var ( errWriteTimeout = &netError{msg: "websocket: write timeout", timeout: true, temporary: true} errUnexpectedEOF = &CloseError{Code: CloseAbnormalClosure, Text: io.ErrUnexpectedEOF.Error()} errBadWriteOpCode = errors.New("websocket: bad write message type") errWriteClosed = errors.New("websocket: write closed") errInvalidControlFrame = errors.New("websocket: invalid control frame") ) func newMaskKey() [4]byte { n := rand.Uint32() return [4]byte{byte(n), byte(n >> 8), byte(n >> 16), byte(n >> 24)} } func hideTempErr(err error) error { if e, ok := err.(net.Error); ok && e.Temporary() { err = &netError{msg: e.Error(), timeout: e.Timeout()} } return err } func isControl(frameType int) bool { return frameType == CloseMessage || frameType == PingMessage || frameType == PongMessage } func isData(frameType int) bool { return frameType == TextMessage || frameType == BinaryMessage } var validReceivedCloseCodes = map[int]bool{ // see http://www.iana.org/assignments/websocket/websocket.xhtml#close-code-number CloseNormalClosure: true, CloseGoingAway: true, CloseProtocolError: true, CloseUnsupportedData: true, CloseNoStatusReceived: false, CloseAbnormalClosure: false, CloseInvalidFramePayloadData: true, ClosePolicyViolation: true, CloseMessageTooBig: true, CloseMandatoryExtension: true, CloseInternalServerErr: true, CloseServiceRestart: true, CloseTryAgainLater: true, CloseTLSHandshake: false, } func isValidReceivedCloseCode(code int) bool { return validReceivedCloseCodes[code] || (code >= 3000 && code <= 4999) } // BufferPool represents a pool of buffers. The *sync.Pool type satisfies this // interface. The type of the value stored in a pool is not specified. type BufferPool interface { // Get gets a value from the pool or returns nil if the pool is empty. Get() interface{} // Put adds a value to the pool. Put(interface{}) } // writePoolData is the type added to the write buffer pool. This wrapper is // used to prevent applications from peeking at and depending on the values // added to the pool. type writePoolData struct{ buf []byte } // The Conn type represents a WebSocket connection. type Conn struct { conn net.Conn isServer bool subprotocol string // Write fields mu chan bool // used as mutex to protect write to conn writeBuf []byte // frame is constructed in this buffer. writePool BufferPool writeBufSize int writeDeadline time.Time writer io.WriteCloser // the current writer returned to the application isWriting bool // for best-effort concurrent write detection writeErrMu sync.Mutex writeErr error enableWriteCompression bool compressionLevel int newCompressionWriter func(io.WriteCloser, int) io.WriteCloser // Read fields reader io.ReadCloser // the current reader returned to the application readErr error br *bufio.Reader // bytes remaining in current frame. // set setReadRemaining to safely update this value and prevent overflow readRemaining int64 readFinal bool // true the current message has more frames. readLength int64 // Message size. readLimit int64 // Maximum message size. readMaskPos int readMaskKey [4]byte handlePong func(string) error handlePing func(string) error handleClose func(int, string) error readErrCount int messageReader *messageReader // the current low-level reader readDecompress bool // whether last read frame had RSV1 set newDecompressionReader func(io.Reader) io.ReadCloser } func newConn(conn net.Conn, isServer bool, readBufferSize, writeBufferSize int, writeBufferPool BufferPool, br *bufio.Reader, writeBuf []byte) *Conn { if br == nil { if readBufferSize == 0 { readBufferSize = defaultReadBufferSize } else if readBufferSize < maxControlFramePayloadSize { // must be large enough for control frame readBufferSize = maxControlFramePayloadSize } br = bufio.NewReaderSize(conn, readBufferSize) } if writeBufferSize <= 0 { writeBufferSize = defaultWriteBufferSize } writeBufferSize += maxFrameHeaderSize if writeBuf == nil && writeBufferPool == nil { writeBuf = make([]byte, writeBufferSize) } mu := make(chan bool, 1) mu <- true c := &Conn{ isServer: isServer, br: br, conn: conn, mu: mu, readFinal: true, writeBuf: writeBuf, writePool: writeBufferPool, writeBufSize: writeBufferSize, enableWriteCompression: true, compressionLevel: defaultCompressionLevel, } c.SetCloseHandler(nil) c.SetPingHandler(nil) c.SetPongHandler(nil) return c } // setReadRemaining tracks the number of bytes remaining on the connection. If n // overflows, an ErrReadLimit is returned. func (c *Conn) setReadRemaining(n int64) error { if n < 0 { return ErrReadLimit } c.readRemaining = n return nil } // Subprotocol returns the negotiated protocol for the connection. func (c *Conn) Subprotocol() string { return c.subprotocol } // Close closes the underlying network connection without sending or waiting // for a close message. func (c *Conn) Close() error { return c.conn.Close() } // LocalAddr returns the local network address. func (c *Conn) LocalAddr() net.Addr { return c.conn.LocalAddr() } // RemoteAddr returns the remote network address. func (c *Conn) RemoteAddr() net.Addr { return c.conn.RemoteAddr() } // Write methods func (c *Conn) writeFatal(err error) error { err = hideTempErr(err) c.writeErrMu.Lock() if c.writeErr == nil { c.writeErr = err } c.writeErrMu.Unlock() return err } func (c *Conn) read(n int) ([]byte, error) { p, err := c.br.Peek(n) if err == io.EOF { err = errUnexpectedEOF } c.br.Discard(len(p)) return p, err } func (c *Conn) write(frameType int, deadline time.Time, buf0, buf1 []byte) error { <-c.mu defer func() { c.mu <- true }() c.writeErrMu.Lock() err := c.writeErr c.writeErrMu.Unlock() if err != nil { return err } c.conn.SetWriteDeadline(deadline) if len(buf1) == 0 { _, err = c.conn.Write(buf0) } else { err = c.writeBufs(buf0, buf1) } if err != nil { return c.writeFatal(err) } if frameType == CloseMessage { c.writeFatal(ErrCloseSent) } return nil } // WriteControl writes a control message with the given deadline. The allowed // message types are CloseMessage, PingMessage and PongMessage. func (c *Conn) WriteControl(messageType int, data []byte, deadline time.Time) error { if !isControl(messageType) { return errBadWriteOpCode } if len(data) > maxControlFramePayloadSize { return errInvalidControlFrame } b0 := byte(messageType) | finalBit b1 := byte(len(data)) if !c.isServer { b1 |= maskBit } buf := make([]byte, 0, maxFrameHeaderSize+maxControlFramePayloadSize) buf = append(buf, b0, b1) if c.isServer { buf = append(buf, data...) } else { key := newMaskKey() buf = append(buf, key[:]...) buf = append(buf, data...) maskBytes(key, 0, buf[6:]) } d := time.Hour * 1000 if !deadline.IsZero() { d = deadline.Sub(time.Now()) if d < 0 { return errWriteTimeout } } timer := time.NewTimer(d) select { case <-c.mu: timer.Stop() case <-timer.C: return errWriteTimeout } defer func() { c.mu <- true }() c.writeErrMu.Lock() err := c.writeErr c.writeErrMu.Unlock() if err != nil { return err } c.conn.SetWriteDeadline(deadline) _, err = c.conn.Write(buf) if err != nil { return c.writeFatal(err) } if messageType == CloseMessage { c.writeFatal(ErrCloseSent) } return err } // beginMessage prepares a connection and message writer for a new message. func (c *Conn) beginMessage(mw *messageWriter, messageType int) error { // Close previous writer if not already closed by the application. It's // probably better to return an error in this situation, but we cannot // change this without breaking existing applications. if c.writer != nil { c.writer.Close() c.writer = nil } if !isControl(messageType) && !isData(messageType) { return errBadWriteOpCode } c.writeErrMu.Lock() err := c.writeErr c.writeErrMu.Unlock() if err != nil { return err } mw.c = c mw.frameType = messageType mw.pos = maxFrameHeaderSize if c.writeBuf == nil { wpd, ok := c.writePool.Get().(writePoolData) if ok { c.writeBuf = wpd.buf } else { c.writeBuf = make([]byte, c.writeBufSize) } } return nil } // NextWriter returns a writer for the next message to send. The writer's Close // method flushes the complete message to the network. // // There can be at most one open writer on a connection. NextWriter closes the // previous writer if the application has not already done so. // // All message types (TextMessage, BinaryMessage, CloseMessage, PingMessage and // PongMessage) are supported. func (c *Conn) NextWriter(messageType int) (io.WriteCloser, error) { var mw messageWriter if err := c.beginMessage(&mw, messageType); err != nil { return nil, err } c.writer = &mw if c.newCompressionWriter != nil && c.enableWriteCompression && isData(messageType) { w := c.newCompressionWriter(c.writer, c.compressionLevel) mw.compress = true c.writer = w } return c.writer, nil } type messageWriter struct { c *Conn compress bool // whether next call to flushFrame should set RSV1 pos int // end of data in writeBuf. frameType int // type of the current frame. err error } func (w *messageWriter) endMessage(err error) error { if w.err != nil { return err } c := w.c w.err = err c.writer = nil if c.writePool != nil { c.writePool.Put(writePoolData{buf: c.writeBuf}) c.writeBuf = nil } return err } // flushFrame writes buffered data and extra as a frame to the network. The // final argument indicates that this is the last frame in the message. func (w *messageWriter) flushFrame(final bool, extra []byte) error { c := w.c length := w.pos - maxFrameHeaderSize + len(extra) // Check for invalid control frames. if isControl(w.frameType) && (!final || length > maxControlFramePayloadSize) { return w.endMessage(errInvalidControlFrame) } b0 := byte(w.frameType) if final { b0 |= finalBit } if w.compress { b0 |= rsv1Bit } w.compress = false b1 := byte(0) if !c.isServer { b1 |= maskBit } // Assume that the frame starts at beginning of c.writeBuf. framePos := 0 if c.isServer { // Adjust up if mask not included in the header. framePos = 4 } switch { case length >= 65536: c.writeBuf[framePos] = b0 c.writeBuf[framePos+1] = b1 | 127 binary.BigEndian.PutUint64(c.writeBuf[framePos+2:], uint64(length)) case length > 125: framePos += 6 c.writeBuf[framePos] = b0 c.writeBuf[framePos+1] = b1 | 126 binary.BigEndian.PutUint16(c.writeBuf[framePos+2:], uint16(length)) default: framePos += 8 c.writeBuf[framePos] = b0 c.writeBuf[framePos+1] = b1 | byte(length) } if !c.isServer { key := newMaskKey() copy(c.writeBuf[maxFrameHeaderSize-4:], key[:]) maskBytes(key, 0, c.writeBuf[maxFrameHeaderSize:w.pos]) if len(extra) > 0 { return w.endMessage(c.writeFatal(errors.New("websocket: internal error, extra used in client mode"))) } } // Write the buffers to the connection with best-effort detection of // concurrent writes. See the concurrency section in the package // documentation for more info. if c.isWriting { panic("concurrent write to websocket connection") } c.isWriting = true err := c.write(w.frameType, c.writeDeadline, c.writeBuf[framePos:w.pos], extra) if !c.isWriting { panic("concurrent write to websocket connection") } c.isWriting = false if err != nil { return w.endMessage(err) } if final { w.endMessage(errWriteClosed) return nil } // Setup for next frame. w.pos = maxFrameHeaderSize w.frameType = continuationFrame return nil } func (w *messageWriter) ncopy(max int) (int, error) { n := len(w.c.writeBuf) - w.pos if n <= 0 { if err := w.flushFrame(false, nil); err != nil { return 0, err } n = len(w.c.writeBuf) - w.pos } if n > max { n = max } return n, nil } func (w *messageWriter) Write(p []byte) (int, error) { if w.err != nil { return 0, w.err } if len(p) > 2*len(w.c.writeBuf) && w.c.isServer { // Don't buffer large messages. err := w.flushFrame(false, p) if err != nil { return 0, err } return len(p), nil } nn := len(p) for len(p) > 0 { n, err := w.ncopy(len(p)) if err != nil { return 0, err } copy(w.c.writeBuf[w.pos:], p[:n]) w.pos += n p = p[n:] } return nn, nil } func (w *messageWriter) WriteString(p string) (int, error) { if w.err != nil { return 0, w.err } nn := len(p) for len(p) > 0 { n, err := w.ncopy(len(p)) if err != nil { return 0, err } copy(w.c.writeBuf[w.pos:], p[:n]) w.pos += n p = p[n:] } return nn, nil } func (w *messageWriter) ReadFrom(r io.Reader) (nn int64, err error) { if w.err != nil { return 0, w.err } for { if w.pos == len(w.c.writeBuf) { err = w.flushFrame(false, nil) if err != nil { break } } var n int n, err = r.Read(w.c.writeBuf[w.pos:]) w.pos += n nn += int64(n) if err != nil { if err == io.EOF { err = nil } break } } return nn, err } func (w *messageWriter) Close() error { if w.err != nil { return w.err } return w.flushFrame(true, nil) } // WritePreparedMessage writes prepared message into connection. func (c *Conn) WritePreparedMessage(pm *PreparedMessage) error { frameType, frameData, err := pm.frame(prepareKey{ isServer: c.isServer, compress: c.newCompressionWriter != nil && c.enableWriteCompression && isData(pm.messageType), compressionLevel: c.compressionLevel, }) if err != nil { return err } if c.isWriting { panic("concurrent write to websocket connection") } c.isWriting = true err = c.write(frameType, c.writeDeadline, frameData, nil) if !c.isWriting { panic("concurrent write to websocket connection") } c.isWriting = false return err } // WriteMessage is a helper method for getting a writer using NextWriter, // writing the message and closing the writer. func (c *Conn) WriteMessage(messageType int, data []byte) error { if c.isServer && (c.newCompressionWriter == nil || !c.enableWriteCompression) { // Fast path with no allocations and single frame. var mw messageWriter if err := c.beginMessage(&mw, messageType); err != nil { return err } n := copy(c.writeBuf[mw.pos:], data) mw.pos += n data = data[n:] return mw.flushFrame(true, data) } w, err := c.NextWriter(messageType) if err != nil { return err } if _, err = w.Write(data); err != nil { return err } return w.Close() } // SetWriteDeadline sets the write deadline on the underlying network // connection. After a write has timed out, the websocket state is corrupt and // all future writes will return an error. A zero value for t means writes will // not time out. func (c *Conn) SetWriteDeadline(t time.Time) error { c.writeDeadline = t return nil } // Read methods func (c *Conn) advanceFrame() (int, error) { // 1. Skip remainder of previous frame. if c.readRemaining > 0 { if _, err := io.CopyN(ioutil.Discard, c.br, c.readRemaining); err != nil { return noFrame, err } } // 2. Read and parse first two bytes of frame header. p, err := c.read(2) if err != nil { return noFrame, err } final := p[0]&finalBit != 0 frameType := int(p[0] & 0xf) mask := p[1]&maskBit != 0 c.setReadRemaining(int64(p[1] & 0x7f)) c.readDecompress = false if c.newDecompressionReader != nil && (p[0]&rsv1Bit) != 0 { c.readDecompress = true p[0] &^= rsv1Bit } if rsv := p[0] & (rsv1Bit | rsv2Bit | rsv3Bit); rsv != 0 { return noFrame, c.handleProtocolError("unexpected reserved bits 0x" + strconv.FormatInt(int64(rsv), 16)) } switch frameType { case CloseMessage, PingMessage, PongMessage: if c.readRemaining > maxControlFramePayloadSize { return noFrame, c.handleProtocolError("control frame length > 125") } if !final { return noFrame, c.handleProtocolError("control frame not final") } case TextMessage, BinaryMessage: if !c.readFinal { return noFrame, c.handleProtocolError("message start before final message frame") } c.readFinal = final case continuationFrame: if c.readFinal { return noFrame, c.handleProtocolError("continuation after final message frame") } c.readFinal = final default: return noFrame, c.handleProtocolError("unknown opcode " + strconv.Itoa(frameType)) } // 3. Read and parse frame length as per // https://tools.ietf.org/html/rfc6455#section-5.2 // // The length of the "Payload data", in bytes: if 0-125, that is the payload // length. // - If 126, the following 2 bytes interpreted as a 16-bit unsigned // integer are the payload length. // - If 127, the following 8 bytes interpreted as // a 64-bit unsigned integer (the most significant bit MUST be 0) are the // payload length. Multibyte length quantities are expressed in network byte // order. switch c.readRemaining { case 126: p, err := c.read(2) if err != nil { return noFrame, err } if err := c.setReadRemaining(int64(binary.BigEndian.Uint16(p))); err != nil { return noFrame, err } case 127: p, err := c.read(8) if err != nil { return noFrame, err } if err := c.setReadRemaining(int64(binary.BigEndian.Uint64(p))); err != nil { return noFrame, err } } // 4. Handle frame masking. if mask != c.isServer { return noFrame, c.handleProtocolError("incorrect mask flag") } if mask { c.readMaskPos = 0 p, err := c.read(len(c.readMaskKey)) if err != nil { return noFrame, err } copy(c.readMaskKey[:], p) } // 5. For text and binary messages, enforce read limit and return. if frameType == continuationFrame || frameType == TextMessage || frameType == BinaryMessage { c.readLength += c.readRemaining // Don't allow readLength to overflow in the presence of a large readRemaining // counter. if c.readLength < 0 { return noFrame, ErrReadLimit } if c.readLimit > 0 && c.readLength > c.readLimit { c.WriteControl(CloseMessage, FormatCloseMessage(CloseMessageTooBig, ""), time.Now().Add(writeWait)) return noFrame, ErrReadLimit } return frameType, nil } // 6. Read control frame payload. var payload []byte if c.readRemaining > 0 { payload, err = c.read(int(c.readRemaining)) c.setReadRemaining(0) if err != nil { return noFrame, err } if c.isServer { maskBytes(c.readMaskKey, 0, payload) } } // 7. Process control frame payload. switch frameType { case PongMessage: if err := c.handlePong(string(payload)); err != nil { return noFrame, err } case PingMessage: if err := c.handlePing(string(payload)); err != nil { return noFrame, err } case CloseMessage: closeCode := CloseNoStatusReceived closeText := "" if len(payload) >= 2 { closeCode = int(binary.BigEndian.Uint16(payload)) if !isValidReceivedCloseCode(closeCode) { return noFrame, c.handleProtocolError("invalid close code") } closeText = string(payload[2:]) if !utf8.ValidString(closeText) { return noFrame, c.handleProtocolError("invalid utf8 payload in close frame") } } if err := c.handleClose(closeCode, closeText); err != nil { return noFrame, err } return noFrame, &CloseError{Code: closeCode, Text: closeText} } return frameType, nil } func (c *Conn) handleProtocolError(message string) error { c.WriteControl(CloseMessage, FormatCloseMessage(CloseProtocolError, message), time.Now().Add(writeWait)) return errors.New("websocket: " + message) } // NextReader returns the next data message received from the peer. The // returned messageType is either TextMessage or BinaryMessage. // // There can be at most one open reader on a connection. NextReader discards // the previous message if the application has not already consumed it. // // Applications must break out of the application's read loop when this method // returns a non-nil error value. Errors returned from this method are // permanent. Once this method returns a non-nil error, all subsequent calls to // this method return the same error. func (c *Conn) NextReader() (messageType int, r io.Reader, err error) { // Close previous reader, only relevant for decompression. if c.reader != nil { c.reader.Close() c.reader = nil } c.messageReader = nil c.readLength = 0 for c.readErr == nil { frameType, err := c.advanceFrame() if err != nil { c.readErr = hideTempErr(err) break } if frameType == TextMessage || frameType == BinaryMessage { c.messageReader = &messageReader{c} c.reader = c.messageReader if c.readDecompress { c.reader = c.newDecompressionReader(c.reader) } return frameType, c.reader, nil } } // Applications that do handle the error returned from this method spin in // tight loop on connection failure. To help application developers detect // this error, panic on repeated reads to the failed connection. c.readErrCount++ if c.readErrCount >= 1000 { panic("repeated read on failed websocket connection") } return noFrame, nil, c.readErr } type messageReader struct{ c *Conn } func (r *messageReader) Read(b []byte) (int, error) { c := r.c if c.messageReader != r { return 0, io.EOF } for c.readErr == nil { if c.readRemaining > 0 { if int64(len(b)) > c.readRemaining { b = b[:c.readRemaining] } n, err := c.br.Read(b) c.readErr = hideTempErr(err) if c.isServer { c.readMaskPos = maskBytes(c.readMaskKey, c.readMaskPos, b[:n]) } rem := c.readRemaining rem -= int64(n) c.setReadRemaining(rem) if c.readRemaining > 0 && c.readErr == io.EOF { c.readErr = errUnexpectedEOF } return n, c.readErr } if c.readFinal { c.messageReader = nil return 0, io.EOF } frameType, err := c.advanceFrame() switch { case err != nil: c.readErr = hideTempErr(err) case frameType == TextMessage || frameType == BinaryMessage: c.readErr = errors.New("websocket: internal error, unexpected text or binary in Reader") } } err := c.readErr if err == io.EOF && c.messageReader == r { err = errUnexpectedEOF } return 0, err } func (r *messageReader) Close() error { return nil } // ReadMessage is a helper method for getting a reader using NextReader and // reading from that reader to a buffer. func (c *Conn) ReadMessage() (messageType int, p []byte, err error) { var r io.Reader messageType, r, err = c.NextReader() if err != nil { return messageType, nil, err } p, err = ioutil.ReadAll(r) return messageType, p, err } // SetReadDeadline sets the read deadline on the underlying network connection. // After a read has timed out, the websocket connection state is corrupt and // all future reads will return an error. A zero value for t means reads will // not time out. func (c *Conn) SetReadDeadline(t time.Time) error { return c.conn.SetReadDeadline(t) } // SetReadLimit sets the maximum size in bytes for a message read from the peer. If a // message exceeds the limit, the connection sends a close message to the peer // and returns ErrReadLimit to the application. func (c *Conn) SetReadLimit(limit int64) { c.readLimit = limit } // CloseHandler returns the current close handler func (c *Conn) CloseHandler() func(code int, text string) error { return c.handleClose } // SetCloseHandler sets the handler for close messages received from the peer. // The code argument to h is the received close code or CloseNoStatusReceived // if the close message is empty. The default close handler sends a close // message back to the peer. // // The handler function is called from the NextReader, ReadMessage and message // reader Read methods. The application must read the connection to process // close messages as described in the section on Control Messages above. // // The connection read methods return a CloseError when a close message is // received. Most applications should handle close messages as part of their // normal error handling. Applications should only set a close handler when the // application must perform some action before sending a close message back to // the peer. func (c *Conn) SetCloseHandler(h func(code int, text string) error) { if h == nil { h = func(code int, text string) error { message := FormatCloseMessage(code, "") c.WriteControl(CloseMessage, message, time.Now().Add(writeWait)) return nil } } c.handleClose = h } // PingHandler returns the current ping handler func (c *Conn) PingHandler() func(appData string) error { return c.handlePing } // SetPingHandler sets the handler for ping messages received from the peer. // The appData argument to h is the PING message application data. The default // ping handler sends a pong to the peer. // // The handler function is called from the NextReader, ReadMessage and message // reader Read methods. The application must read the connection to process // ping messages as described in the section on Control Messages above. func (c *Conn) SetPingHandler(h func(appData string) error) { if h == nil { h = func(message string) error { err := c.WriteControl(PongMessage, []byte(message), time.Now().Add(writeWait)) if err == ErrCloseSent { return nil } else if e, ok := err.(net.Error); ok && e.Temporary() { return nil } return err } } c.handlePing = h } // PongHandler returns the current pong handler func (c *Conn) PongHandler() func(appData string) error { return c.handlePong } // SetPongHandler sets the handler for pong messages received from the peer. // The appData argument to h is the PONG message application data. The default // pong handler does nothing. // // The handler function is called from the NextReader, ReadMessage and message // reader Read methods. The application must read the connection to process // pong messages as described in the section on Control Messages above. func (c *Conn) SetPongHandler(h func(appData string) error) { if h == nil { h = func(string) error { return nil } } c.handlePong = h } // UnderlyingConn returns the internal net.Conn. This can be used to further // modifications to connection specific flags. func (c *Conn) UnderlyingConn() net.Conn { return c.conn } // EnableWriteCompression enables and disables write compression of // subsequent text and binary messages. This function is a noop if // compression was not negotiated with the peer. func (c *Conn) EnableWriteCompression(enable bool) { c.enableWriteCompression = enable } // SetCompressionLevel sets the flate compression level for subsequent text and // binary messages. This function is a noop if compression was not negotiated // with the peer. See the compress/flate package for a description of // compression levels. func (c *Conn) SetCompressionLevel(level int) error { if !isValidCompressionLevel(level) { return errors.New("websocket: invalid compression level") } c.compressionLevel = level return nil } // FormatCloseMessage formats closeCode and text as a WebSocket close message. // An empty message is returned for code CloseNoStatusReceived. func FormatCloseMessage(closeCode int, text string) []byte { if closeCode == CloseNoStatusReceived { // Return empty message because it's illegal to send // CloseNoStatusReceived. Return non-nil value in case application // checks for nil. return []byte{} } buf := make([]byte, 2+len(text)) binary.BigEndian.PutUint16(buf, uint16(closeCode)) copy(buf[2:], text) return buf } websocket-1.4.1/conn_broadcast_test.go000066400000000000000000000057201353036111300200500ustar00rootroot00000000000000// Copyright 2017 The Gorilla WebSocket 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 websocket import ( "io" "io/ioutil" "sync/atomic" "testing" ) // broadcastBench allows to run broadcast benchmarks. // In every broadcast benchmark we create many connections, then send the same // message into every connection and wait for all writes complete. This emulates // an application where many connections listen to the same data - i.e. PUB/SUB // scenarios with many subscribers in one channel. type broadcastBench struct { w io.Writer message *broadcastMessage closeCh chan struct{} doneCh chan struct{} count int32 conns []*broadcastConn compression bool usePrepared bool } type broadcastMessage struct { payload []byte prepared *PreparedMessage } type broadcastConn struct { conn *Conn msgCh chan *broadcastMessage } func newBroadcastConn(c *Conn) *broadcastConn { return &broadcastConn{ conn: c, msgCh: make(chan *broadcastMessage, 1), } } func newBroadcastBench(usePrepared, compression bool) *broadcastBench { bench := &broadcastBench{ w: ioutil.Discard, doneCh: make(chan struct{}), closeCh: make(chan struct{}), usePrepared: usePrepared, compression: compression, } msg := &broadcastMessage{ payload: textMessages(1)[0], } if usePrepared { pm, _ := NewPreparedMessage(TextMessage, msg.payload) msg.prepared = pm } bench.message = msg bench.makeConns(10000) return bench } func (b *broadcastBench) makeConns(numConns int) { conns := make([]*broadcastConn, numConns) for i := 0; i < numConns; i++ { c := newTestConn(nil, b.w, true) if b.compression { c.enableWriteCompression = true c.newCompressionWriter = compressNoContextTakeover } conns[i] = newBroadcastConn(c) go func(c *broadcastConn) { for { select { case msg := <-c.msgCh: if b.usePrepared { c.conn.WritePreparedMessage(msg.prepared) } else { c.conn.WriteMessage(TextMessage, msg.payload) } val := atomic.AddInt32(&b.count, 1) if val%int32(numConns) == 0 { b.doneCh <- struct{}{} } case <-b.closeCh: return } } }(conns[i]) } b.conns = conns } func (b *broadcastBench) close() { close(b.closeCh) } func (b *broadcastBench) runOnce() { for _, c := range b.conns { c.msgCh <- b.message } <-b.doneCh } func BenchmarkBroadcast(b *testing.B) { benchmarks := []struct { name string usePrepared bool compression bool }{ {"NoCompression", false, false}, {"WithCompression", false, true}, {"NoCompressionPrepared", true, false}, {"WithCompressionPrepared", true, true}, } for _, bm := range benchmarks { b.Run(bm.name, func(b *testing.B) { bench := newBroadcastBench(bm.usePrepared, bm.compression) defer bench.close() b.ResetTimer() for i := 0; i < b.N; i++ { bench.runOnce() } b.ReportAllocs() }) } } websocket-1.4.1/conn_test.go000066400000000000000000000440771353036111300160360ustar00rootroot00000000000000// Copyright 2013 The Gorilla WebSocket 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 websocket import ( "bufio" "bytes" "errors" "fmt" "io" "io/ioutil" "net" "reflect" "sync" "testing" "testing/iotest" "time" ) var _ net.Error = errWriteTimeout type fakeNetConn struct { io.Reader io.Writer } func (c fakeNetConn) Close() error { return nil } func (c fakeNetConn) LocalAddr() net.Addr { return localAddr } func (c fakeNetConn) RemoteAddr() net.Addr { return remoteAddr } func (c fakeNetConn) SetDeadline(t time.Time) error { return nil } func (c fakeNetConn) SetReadDeadline(t time.Time) error { return nil } func (c fakeNetConn) SetWriteDeadline(t time.Time) error { return nil } type fakeAddr int var ( localAddr = fakeAddr(1) remoteAddr = fakeAddr(2) ) func (a fakeAddr) Network() string { return "net" } func (a fakeAddr) String() string { return "str" } // newTestConn creates a connnection backed by a fake network connection using // default values for buffering. func newTestConn(r io.Reader, w io.Writer, isServer bool) *Conn { return newConn(fakeNetConn{Reader: r, Writer: w}, isServer, 1024, 1024, nil, nil, nil) } func TestFraming(t *testing.T) { frameSizes := []int{ 0, 1, 2, 124, 125, 126, 127, 128, 129, 65534, 65535, // 65536, 65537 } var readChunkers = []struct { name string f func(io.Reader) io.Reader }{ {"half", iotest.HalfReader}, {"one", iotest.OneByteReader}, {"asis", func(r io.Reader) io.Reader { return r }}, } writeBuf := make([]byte, 65537) for i := range writeBuf { writeBuf[i] = byte(i) } var writers = []struct { name string f func(w io.Writer, n int) (int, error) }{ {"iocopy", func(w io.Writer, n int) (int, error) { nn, err := io.Copy(w, bytes.NewReader(writeBuf[:n])) return int(nn), err }}, {"write", func(w io.Writer, n int) (int, error) { return w.Write(writeBuf[:n]) }}, {"string", func(w io.Writer, n int) (int, error) { return io.WriteString(w, string(writeBuf[:n])) }}, } for _, compress := range []bool{false, true} { for _, isServer := range []bool{true, false} { for _, chunker := range readChunkers { var connBuf bytes.Buffer wc := newTestConn(nil, &connBuf, isServer) rc := newTestConn(chunker.f(&connBuf), nil, !isServer) if compress { wc.newCompressionWriter = compressNoContextTakeover rc.newDecompressionReader = decompressNoContextTakeover } for _, n := range frameSizes { for _, writer := range writers { name := fmt.Sprintf("z:%v, s:%v, r:%s, n:%d w:%s", compress, isServer, chunker.name, n, writer.name) w, err := wc.NextWriter(TextMessage) if err != nil { t.Errorf("%s: wc.NextWriter() returned %v", name, err) continue } nn, err := writer.f(w, n) if err != nil || nn != n { t.Errorf("%s: w.Write(writeBuf[:n]) returned %d, %v", name, nn, err) continue } err = w.Close() if err != nil { t.Errorf("%s: w.Close() returned %v", name, err) continue } opCode, r, err := rc.NextReader() if err != nil || opCode != TextMessage { t.Errorf("%s: NextReader() returned %d, r, %v", name, opCode, err) continue } t.Logf("frame size: %d", n) rbuf, err := ioutil.ReadAll(r) if err != nil { t.Errorf("%s: ReadFull() returned rbuf, %v", name, err) continue } if len(rbuf) != n { t.Errorf("%s: len(rbuf) is %d, want %d", name, len(rbuf), n) continue } for i, b := range rbuf { if byte(i) != b { t.Errorf("%s: bad byte at offset %d", name, i) break } } } } } } } } func TestControl(t *testing.T) { const message = "this is a ping/pong messsage" for _, isServer := range []bool{true, false} { for _, isWriteControl := range []bool{true, false} { name := fmt.Sprintf("s:%v, wc:%v", isServer, isWriteControl) var connBuf bytes.Buffer wc := newTestConn(nil, &connBuf, isServer) rc := newTestConn(&connBuf, nil, !isServer) if isWriteControl { wc.WriteControl(PongMessage, []byte(message), time.Now().Add(time.Second)) } else { w, err := wc.NextWriter(PongMessage) if err != nil { t.Errorf("%s: wc.NextWriter() returned %v", name, err) continue } if _, err := w.Write([]byte(message)); err != nil { t.Errorf("%s: w.Write() returned %v", name, err) continue } if err := w.Close(); err != nil { t.Errorf("%s: w.Close() returned %v", name, err) continue } var actualMessage string rc.SetPongHandler(func(s string) error { actualMessage = s; return nil }) rc.NextReader() if actualMessage != message { t.Errorf("%s: pong=%q, want %q", name, actualMessage, message) continue } } } } } // simpleBufferPool is an implementation of BufferPool for TestWriteBufferPool. type simpleBufferPool struct { v interface{} } func (p *simpleBufferPool) Get() interface{} { v := p.v p.v = nil return v } func (p *simpleBufferPool) Put(v interface{}) { p.v = v } func TestWriteBufferPool(t *testing.T) { const message = "Now is the time for all good people to come to the aid of the party." var buf bytes.Buffer var pool simpleBufferPool rc := newTestConn(&buf, nil, false) // Specify writeBufferSize smaller than message size to ensure that pooling // works with fragmented messages. wc := newConn(fakeNetConn{Writer: &buf}, true, 1024, len(message)-1, &pool, nil, nil) if wc.writeBuf != nil { t.Fatal("writeBuf not nil after create") } // Part 1: test NextWriter/Write/Close w, err := wc.NextWriter(TextMessage) if err != nil { t.Fatalf("wc.NextWriter() returned %v", err) } if wc.writeBuf == nil { t.Fatal("writeBuf is nil after NextWriter") } writeBufAddr := &wc.writeBuf[0] if _, err := io.WriteString(w, message); err != nil { t.Fatalf("io.WriteString(w, message) returned %v", err) } if err := w.Close(); err != nil { t.Fatalf("w.Close() returned %v", err) } if wc.writeBuf != nil { t.Fatal("writeBuf not nil after w.Close()") } if wpd, ok := pool.v.(writePoolData); !ok || len(wpd.buf) == 0 || &wpd.buf[0] != writeBufAddr { t.Fatal("writeBuf not returned to pool") } opCode, p, err := rc.ReadMessage() if opCode != TextMessage || err != nil { t.Fatalf("ReadMessage() returned %d, p, %v", opCode, err) } if s := string(p); s != message { t.Fatalf("message is %s, want %s", s, message) } // Part 2: Test WriteMessage. if err := wc.WriteMessage(TextMessage, []byte(message)); err != nil { t.Fatalf("wc.WriteMessage() returned %v", err) } if wc.writeBuf != nil { t.Fatal("writeBuf not nil after wc.WriteMessage()") } if wpd, ok := pool.v.(writePoolData); !ok || len(wpd.buf) == 0 || &wpd.buf[0] != writeBufAddr { t.Fatal("writeBuf not returned to pool after WriteMessage") } opCode, p, err = rc.ReadMessage() if opCode != TextMessage || err != nil { t.Fatalf("ReadMessage() returned %d, p, %v", opCode, err) } if s := string(p); s != message { t.Fatalf("message is %s, want %s", s, message) } } // TestWriteBufferPoolSync ensures that *sync.Pool works as a buffer pool. func TestWriteBufferPoolSync(t *testing.T) { var buf bytes.Buffer var pool sync.Pool wc := newConn(fakeNetConn{Writer: &buf}, true, 1024, 1024, &pool, nil, nil) rc := newTestConn(&buf, nil, false) const message = "Hello World!" for i := 0; i < 3; i++ { if err := wc.WriteMessage(TextMessage, []byte(message)); err != nil { t.Fatalf("wc.WriteMessage() returned %v", err) } opCode, p, err := rc.ReadMessage() if opCode != TextMessage || err != nil { t.Fatalf("ReadMessage() returned %d, p, %v", opCode, err) } if s := string(p); s != message { t.Fatalf("message is %s, want %s", s, message) } } } // errorWriter is an io.Writer than returns an error on all writes. type errorWriter struct{} func (ew errorWriter) Write(p []byte) (int, error) { return 0, errors.New("error") } // TestWriteBufferPoolError ensures that buffer is returned to pool after error // on write. func TestWriteBufferPoolError(t *testing.T) { // Part 1: Test NextWriter/Write/Close var pool simpleBufferPool wc := newConn(fakeNetConn{Writer: errorWriter{}}, true, 1024, 1024, &pool, nil, nil) w, err := wc.NextWriter(TextMessage) if err != nil { t.Fatalf("wc.NextWriter() returned %v", err) } if wc.writeBuf == nil { t.Fatal("writeBuf is nil after NextWriter") } writeBufAddr := &wc.writeBuf[0] if _, err := io.WriteString(w, "Hello"); err != nil { t.Fatalf("io.WriteString(w, message) returned %v", err) } if err := w.Close(); err == nil { t.Fatalf("w.Close() did not return error") } if wpd, ok := pool.v.(writePoolData); !ok || len(wpd.buf) == 0 || &wpd.buf[0] != writeBufAddr { t.Fatal("writeBuf not returned to pool") } // Part 2: Test WriteMessage wc = newConn(fakeNetConn{Writer: errorWriter{}}, true, 1024, 1024, &pool, nil, nil) if err := wc.WriteMessage(TextMessage, []byte("Hello")); err == nil { t.Fatalf("wc.WriteMessage did not return error") } if wpd, ok := pool.v.(writePoolData); !ok || len(wpd.buf) == 0 || &wpd.buf[0] != writeBufAddr { t.Fatal("writeBuf not returned to pool") } } func TestCloseFrameBeforeFinalMessageFrame(t *testing.T) { const bufSize = 512 expectedErr := &CloseError{Code: CloseNormalClosure, Text: "hello"} var b1, b2 bytes.Buffer wc := newConn(&fakeNetConn{Reader: nil, Writer: &b1}, false, 1024, bufSize, nil, nil, nil) rc := newTestConn(&b1, &b2, true) w, _ := wc.NextWriter(BinaryMessage) w.Write(make([]byte, bufSize+bufSize/2)) wc.WriteControl(CloseMessage, FormatCloseMessage(expectedErr.Code, expectedErr.Text), time.Now().Add(10*time.Second)) w.Close() op, r, err := rc.NextReader() if op != BinaryMessage || err != nil { t.Fatalf("NextReader() returned %d, %v", op, err) } _, err = io.Copy(ioutil.Discard, r) if !reflect.DeepEqual(err, expectedErr) { t.Fatalf("io.Copy() returned %v, want %v", err, expectedErr) } _, _, err = rc.NextReader() if !reflect.DeepEqual(err, expectedErr) { t.Fatalf("NextReader() returned %v, want %v", err, expectedErr) } } func TestEOFWithinFrame(t *testing.T) { const bufSize = 64 for n := 0; ; n++ { var b bytes.Buffer wc := newTestConn(nil, &b, false) rc := newTestConn(&b, nil, true) w, _ := wc.NextWriter(BinaryMessage) w.Write(make([]byte, bufSize)) w.Close() if n >= b.Len() { break } b.Truncate(n) op, r, err := rc.NextReader() if err == errUnexpectedEOF { continue } if op != BinaryMessage || err != nil { t.Fatalf("%d: NextReader() returned %d, %v", n, op, err) } _, err = io.Copy(ioutil.Discard, r) if err != errUnexpectedEOF { t.Fatalf("%d: io.Copy() returned %v, want %v", n, err, errUnexpectedEOF) } _, _, err = rc.NextReader() if err != errUnexpectedEOF { t.Fatalf("%d: NextReader() returned %v, want %v", n, err, errUnexpectedEOF) } } } func TestEOFBeforeFinalFrame(t *testing.T) { const bufSize = 512 var b1, b2 bytes.Buffer wc := newConn(&fakeNetConn{Writer: &b1}, false, 1024, bufSize, nil, nil, nil) rc := newTestConn(&b1, &b2, true) w, _ := wc.NextWriter(BinaryMessage) w.Write(make([]byte, bufSize+bufSize/2)) op, r, err := rc.NextReader() if op != BinaryMessage || err != nil { t.Fatalf("NextReader() returned %d, %v", op, err) } _, err = io.Copy(ioutil.Discard, r) if err != errUnexpectedEOF { t.Fatalf("io.Copy() returned %v, want %v", err, errUnexpectedEOF) } _, _, err = rc.NextReader() if err != errUnexpectedEOF { t.Fatalf("NextReader() returned %v, want %v", err, errUnexpectedEOF) } } func TestWriteAfterMessageWriterClose(t *testing.T) { wc := newTestConn(nil, &bytes.Buffer{}, false) w, _ := wc.NextWriter(BinaryMessage) io.WriteString(w, "hello") if err := w.Close(); err != nil { t.Fatalf("unxpected error closing message writer, %v", err) } if _, err := io.WriteString(w, "world"); err == nil { t.Fatalf("no error writing after close") } w, _ = wc.NextWriter(BinaryMessage) io.WriteString(w, "hello") // close w by getting next writer _, err := wc.NextWriter(BinaryMessage) if err != nil { t.Fatalf("unexpected error getting next writer, %v", err) } if _, err := io.WriteString(w, "world"); err == nil { t.Fatalf("no error writing after close") } } func TestReadLimit(t *testing.T) { t.Run("Test ReadLimit is enforced", func(t *testing.T) { const readLimit = 512 message := make([]byte, readLimit+1) var b1, b2 bytes.Buffer wc := newConn(&fakeNetConn{Writer: &b1}, false, 1024, readLimit-2, nil, nil, nil) rc := newTestConn(&b1, &b2, true) rc.SetReadLimit(readLimit) // Send message at the limit with interleaved pong. w, _ := wc.NextWriter(BinaryMessage) w.Write(message[:readLimit-1]) wc.WriteControl(PongMessage, []byte("this is a pong"), time.Now().Add(10*time.Second)) w.Write(message[:1]) w.Close() // Send message larger than the limit. wc.WriteMessage(BinaryMessage, message[:readLimit+1]) op, _, err := rc.NextReader() if op != BinaryMessage || err != nil { t.Fatalf("1: NextReader() returned %d, %v", op, err) } op, r, err := rc.NextReader() if op != BinaryMessage || err != nil { t.Fatalf("2: NextReader() returned %d, %v", op, err) } _, err = io.Copy(ioutil.Discard, r) if err != ErrReadLimit { t.Fatalf("io.Copy() returned %v", err) } }) t.Run("Test that ReadLimit cannot be overflowed", func(t *testing.T) { const readLimit = 1 var b1, b2 bytes.Buffer rc := newTestConn(&b1, &b2, true) rc.SetReadLimit(readLimit) // First, send a non-final binary message b1.Write([]byte("\x02\x81")) // Mask key b1.Write([]byte("\x00\x00\x00\x00")) // First payload b1.Write([]byte("A")) // Next, send a negative-length, non-final continuation frame b1.Write([]byte("\x00\xFF\x80\x00\x00\x00\x00\x00\x00\x00")) // Mask key b1.Write([]byte("\x00\x00\x00\x00")) // Next, send a too long, final continuation frame b1.Write([]byte("\x80\xFF\x00\x00\x00\x00\x00\x00\x00\x05")) // Mask key b1.Write([]byte("\x00\x00\x00\x00")) // Too-long payload b1.Write([]byte("BCDEF")) op, r, err := rc.NextReader() if op != BinaryMessage || err != nil { t.Fatalf("1: NextReader() returned %d, %v", op, err) } var buf [10]byte var read int n, err := r.Read(buf[:]) if err != nil && err != ErrReadLimit { t.Fatalf("unexpected error testing read limit: %v", err) } read += n n, err = r.Read(buf[:]) if err != nil && err != ErrReadLimit { t.Fatalf("unexpected error testing read limit: %v", err) } read += n if err == nil && read > readLimit { t.Fatalf("read limit exceeded: limit %d, read %d", readLimit, read) } }) } func TestAddrs(t *testing.T) { c := newTestConn(nil, nil, true) if c.LocalAddr() != localAddr { t.Errorf("LocalAddr = %v, want %v", c.LocalAddr(), localAddr) } if c.RemoteAddr() != remoteAddr { t.Errorf("RemoteAddr = %v, want %v", c.RemoteAddr(), remoteAddr) } } func TestUnderlyingConn(t *testing.T) { var b1, b2 bytes.Buffer fc := fakeNetConn{Reader: &b1, Writer: &b2} c := newConn(fc, true, 1024, 1024, nil, nil, nil) ul := c.UnderlyingConn() if ul != fc { t.Fatalf("Underlying conn is not what it should be.") } } func TestBufioReadBytes(t *testing.T) { // Test calling bufio.ReadBytes for value longer than read buffer size. m := make([]byte, 512) m[len(m)-1] = '\n' var b1, b2 bytes.Buffer wc := newConn(fakeNetConn{Writer: &b1}, false, len(m)+64, len(m)+64, nil, nil, nil) rc := newConn(fakeNetConn{Reader: &b1, Writer: &b2}, true, len(m)-64, len(m)-64, nil, nil, nil) w, _ := wc.NextWriter(BinaryMessage) w.Write(m) w.Close() op, r, err := rc.NextReader() if op != BinaryMessage || err != nil { t.Fatalf("NextReader() returned %d, %v", op, err) } br := bufio.NewReader(r) p, err := br.ReadBytes('\n') if err != nil { t.Fatalf("ReadBytes() returned %v", err) } if len(p) != len(m) { t.Fatalf("read returned %d bytes, want %d bytes", len(p), len(m)) } } var closeErrorTests = []struct { err error codes []int ok bool }{ {&CloseError{Code: CloseNormalClosure}, []int{CloseNormalClosure}, true}, {&CloseError{Code: CloseNormalClosure}, []int{CloseNoStatusReceived}, false}, {&CloseError{Code: CloseNormalClosure}, []int{CloseNoStatusReceived, CloseNormalClosure}, true}, {errors.New("hello"), []int{CloseNormalClosure}, false}, } func TestCloseError(t *testing.T) { for _, tt := range closeErrorTests { ok := IsCloseError(tt.err, tt.codes...) if ok != tt.ok { t.Errorf("IsCloseError(%#v, %#v) returned %v, want %v", tt.err, tt.codes, ok, tt.ok) } } } var unexpectedCloseErrorTests = []struct { err error codes []int ok bool }{ {&CloseError{Code: CloseNormalClosure}, []int{CloseNormalClosure}, false}, {&CloseError{Code: CloseNormalClosure}, []int{CloseNoStatusReceived}, true}, {&CloseError{Code: CloseNormalClosure}, []int{CloseNoStatusReceived, CloseNormalClosure}, false}, {errors.New("hello"), []int{CloseNormalClosure}, false}, } func TestUnexpectedCloseErrors(t *testing.T) { for _, tt := range unexpectedCloseErrorTests { ok := IsUnexpectedCloseError(tt.err, tt.codes...) if ok != tt.ok { t.Errorf("IsUnexpectedCloseError(%#v, %#v) returned %v, want %v", tt.err, tt.codes, ok, tt.ok) } } } type blockingWriter struct { c1, c2 chan struct{} } func (w blockingWriter) Write(p []byte) (int, error) { // Allow main to continue close(w.c1) // Wait for panic in main <-w.c2 return len(p), nil } func TestConcurrentWritePanic(t *testing.T) { w := blockingWriter{make(chan struct{}), make(chan struct{})} c := newTestConn(nil, w, false) go func() { c.WriteMessage(TextMessage, []byte{}) }() // wait for goroutine to block in write. <-w.c1 defer func() { close(w.c2) if v := recover(); v != nil { return } }() c.WriteMessage(TextMessage, []byte{}) t.Fatal("should not get here") } type failingReader struct{} func (r failingReader) Read(p []byte) (int, error) { return 0, io.EOF } func TestFailedConnectionReadPanic(t *testing.T) { c := newTestConn(failingReader{}, nil, false) defer func() { if v := recover(); v != nil { return } }() for i := 0; i < 20000; i++ { c.ReadMessage() } t.Fatal("should not get here") } websocket-1.4.1/conn_write.go000066400000000000000000000005251353036111300161770ustar00rootroot00000000000000// Copyright 2016 The Gorilla WebSocket Authors. All rights reserved. // Use of this source code is governed by a BSD-style // license that can be found in the LICENSE file. // +build go1.8 package websocket import "net" func (c *Conn) writeBufs(bufs ...[]byte) error { b := net.Buffers(bufs) _, err := b.WriteTo(c.conn) return err } websocket-1.4.1/conn_write_legacy.go000066400000000000000000000006161353036111300175240ustar00rootroot00000000000000// Copyright 2016 The Gorilla WebSocket Authors. All rights reserved. // Use of this source code is governed by a BSD-style // license that can be found in the LICENSE file. // +build !go1.8 package websocket func (c *Conn) writeBufs(bufs ...[]byte) error { for _, buf := range bufs { if len(buf) > 0 { if _, err := c.conn.Write(buf); err != nil { return err } } } return nil } websocket-1.4.1/doc.go000066400000000000000000000225641353036111300146040ustar00rootroot00000000000000// Copyright 2013 The Gorilla WebSocket 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 websocket implements the WebSocket protocol defined in RFC 6455. // // Overview // // The Conn type represents a WebSocket connection. A server application calls // the Upgrader.Upgrade method from an HTTP request handler to get a *Conn: // // var upgrader = websocket.Upgrader{ // ReadBufferSize: 1024, // WriteBufferSize: 1024, // } // // func handler(w http.ResponseWriter, r *http.Request) { // conn, err := upgrader.Upgrade(w, r, nil) // if err != nil { // log.Println(err) // return // } // ... Use conn to send and receive messages. // } // // Call the connection's WriteMessage and ReadMessage methods to send and // receive messages as a slice of bytes. This snippet of code shows how to echo // messages using these methods: // // for { // messageType, p, err := conn.ReadMessage() // if err != nil { // log.Println(err) // return // } // if err := conn.WriteMessage(messageType, p); err != nil { // log.Println(err) // return // } // } // // In above snippet of code, p is a []byte and messageType is an int with value // websocket.BinaryMessage or websocket.TextMessage. // // An application can also send and receive messages using the io.WriteCloser // and io.Reader interfaces. To send a message, call the connection NextWriter // method to get an io.WriteCloser, write the message to the writer and close // the writer when done. To receive a message, call the connection NextReader // method to get an io.Reader and read until io.EOF is returned. This snippet // shows how to echo messages using the NextWriter and NextReader methods: // // for { // messageType, r, err := conn.NextReader() // if err != nil { // return // } // w, err := conn.NextWriter(messageType) // if err != nil { // return err // } // if _, err := io.Copy(w, r); err != nil { // return err // } // if err := w.Close(); err != nil { // return err // } // } // // Data Messages // // The WebSocket protocol distinguishes between text and binary data messages. // Text messages are interpreted as UTF-8 encoded text. The interpretation of // binary messages is left to the application. // // This package uses the TextMessage and BinaryMessage integer constants to // identify the two data message types. The ReadMessage and NextReader methods // return the type of the received message. The messageType argument to the // WriteMessage and NextWriter methods specifies the type of a sent message. // // It is the application's responsibility to ensure that text messages are // valid UTF-8 encoded text. // // Control Messages // // The WebSocket protocol defines three types of control messages: close, ping // and pong. Call the connection WriteControl, WriteMessage or NextWriter // methods to send a control message to the peer. // // Connections handle received close messages by calling the handler function // set with the SetCloseHandler method and by returning a *CloseError from the // NextReader, ReadMessage or the message Read method. The default close // handler sends a close message to the peer. // // Connections handle received ping messages by calling the handler function // set with the SetPingHandler method. The default ping handler sends a pong // message to the peer. // // Connections handle received pong messages by calling the handler function // set with the SetPongHandler method. The default pong handler does nothing. // If an application sends ping messages, then the application should set a // pong handler to receive the corresponding pong. // // The control message handler functions are called from the NextReader, // ReadMessage and message reader Read methods. The default close and ping // handlers can block these methods for a short time when the handler writes to // the connection. // // The application must read the connection to process close, ping and pong // messages sent from the peer. If the application is not otherwise interested // in messages from the peer, then the application should start a goroutine to // read and discard messages from the peer. A simple example is: // // func readLoop(c *websocket.Conn) { // for { // if _, _, err := c.NextReader(); err != nil { // c.Close() // break // } // } // } // // Concurrency // // Connections support one concurrent reader and one concurrent writer. // // Applications are responsible for ensuring that no more than one goroutine // calls the write methods (NextWriter, SetWriteDeadline, WriteMessage, // WriteJSON, EnableWriteCompression, SetCompressionLevel) concurrently and // that no more than one goroutine calls the read methods (NextReader, // SetReadDeadline, ReadMessage, ReadJSON, SetPongHandler, SetPingHandler) // concurrently. // // The Close and WriteControl methods can be called concurrently with all other // methods. // // Origin Considerations // // Web browsers allow Javascript applications to open a WebSocket connection to // any host. It's up to the server to enforce an origin policy using the Origin // request header sent by the browser. // // The Upgrader calls the function specified in the CheckOrigin field to check // the origin. If the CheckOrigin function returns false, then the Upgrade // method fails the WebSocket handshake with HTTP status 403. // // If the CheckOrigin field is nil, then the Upgrader uses a safe default: fail // the handshake if the Origin request header is present and the Origin host is // not equal to the Host request header. // // The deprecated package-level Upgrade function does not perform origin // checking. The application is responsible for checking the Origin header // before calling the Upgrade function. // // Buffers // // Connections buffer network input and output to reduce the number // of system calls when reading or writing messages. // // Write buffers are also used for constructing WebSocket frames. See RFC 6455, // Section 5 for a discussion of message framing. A WebSocket frame header is // written to the network each time a write buffer is flushed to the network. // Decreasing the size of the write buffer can increase the amount of framing // overhead on the connection. // // The buffer sizes in bytes are specified by the ReadBufferSize and // WriteBufferSize fields in the Dialer and Upgrader. The Dialer uses a default // size of 4096 when a buffer size field is set to zero. The Upgrader reuses // buffers created by the HTTP server when a buffer size field is set to zero. // The HTTP server buffers have a size of 4096 at the time of this writing. // // The buffer sizes do not limit the size of a message that can be read or // written by a connection. // // Buffers are held for the lifetime of the connection by default. If the // Dialer or Upgrader WriteBufferPool field is set, then a connection holds the // write buffer only when writing a message. // // Applications should tune the buffer sizes to balance memory use and // performance. Increasing the buffer size uses more memory, but can reduce the // number of system calls to read or write the network. In the case of writing, // increasing the buffer size can reduce the number of frame headers written to // the network. // // Some guidelines for setting buffer parameters are: // // Limit the buffer sizes to the maximum expected message size. Buffers larger // than the largest message do not provide any benefit. // // Depending on the distribution of message sizes, setting the buffer size to // to a value less than the maximum expected message size can greatly reduce // memory use with a small impact on performance. Here's an example: If 99% of // the messages are smaller than 256 bytes and the maximum message size is 512 // bytes, then a buffer size of 256 bytes will result in 1.01 more system calls // than a buffer size of 512 bytes. The memory savings is 50%. // // A write buffer pool is useful when the application has a modest number // writes over a large number of connections. when buffers are pooled, a larger // buffer size has a reduced impact on total memory use and has the benefit of // reducing system calls and frame overhead. // // Compression EXPERIMENTAL // // Per message compression extensions (RFC 7692) are experimentally supported // by this package in a limited capacity. Setting the EnableCompression option // to true in Dialer or Upgrader will attempt to negotiate per message deflate // support. // // var upgrader = websocket.Upgrader{ // EnableCompression: true, // } // // If compression was successfully negotiated with the connection's peer, any // message received in compressed form will be automatically decompressed. // All Read methods will return uncompressed bytes. // // Per message compression of messages written to a connection can be enabled // or disabled by calling the corresponding Conn method: // // conn.EnableWriteCompression(false) // // Currently this package does not support compression with "context takeover". // This means that messages must be compressed and decompressed in isolation, // without retaining sliding window or dictionary state across messages. For // more details refer to RFC 7692. // // Use of compression is experimental and may result in decreased performance. package websocket websocket-1.4.1/example_test.go000066400000000000000000000024421353036111300165220ustar00rootroot00000000000000// Copyright 2015 The Gorilla WebSocket 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 websocket_test import ( "log" "net/http" "testing" "github.com/gorilla/websocket" ) var ( c *websocket.Conn req *http.Request ) // The websocket.IsUnexpectedCloseError function is useful for identifying // application and protocol errors. // // This server application works with a client application running in the // browser. The client application does not explicitly close the websocket. The // only expected close message from the client has the code // websocket.CloseGoingAway. All other other close messages are likely the // result of an application or protocol error and are logged to aid debugging. func ExampleIsUnexpectedCloseError() { for { messageType, p, err := c.ReadMessage() if err != nil { if websocket.IsUnexpectedCloseError(err, websocket.CloseGoingAway) { log.Printf("error: %v, user-agent: %v", err, req.Header.Get("User-Agent")) } return } processMesage(messageType, p) } } func processMesage(mt int, p []byte) {} // TestX prevents godoc from showing this entire file in the example. Remove // this function when a second example is added. func TestX(t *testing.T) {} websocket-1.4.1/examples/000077500000000000000000000000001353036111300153155ustar00rootroot00000000000000websocket-1.4.1/examples/autobahn/000077500000000000000000000000001353036111300171165ustar00rootroot00000000000000websocket-1.4.1/examples/autobahn/README.md000066400000000000000000000005341353036111300203770ustar00rootroot00000000000000# Test Server This package contains a server for the [Autobahn WebSockets Test Suite](https://github.com/crossbario/autobahn-testsuite). To test the server, run go run server.go and start the client test driver wstest -m fuzzingclient -s fuzzingclient.json When the client completes, it writes a report to reports/clients/index.html. websocket-1.4.1/examples/autobahn/fuzzingclient.json000066400000000000000000000012311353036111300227010ustar00rootroot00000000000000 { "options": {"failByDrop": false}, "outdir": "./reports/clients", "servers": [ {"agent": "ReadAllWriteMessage", "url": "ws://localhost:9000/m", "options": {"version": 18}}, {"agent": "ReadAllWritePreparedMessage", "url": "ws://localhost:9000/p", "options": {"version": 18}}, {"agent": "ReadAllWrite", "url": "ws://localhost:9000/r", "options": {"version": 18}}, {"agent": "CopyFull", "url": "ws://localhost:9000/f", "options": {"version": 18}}, {"agent": "CopyWriterOnly", "url": "ws://localhost:9000/c", "options": {"version": 18}} ], "cases": ["*"], "exclude-cases": [], "exclude-agent-cases": {} } websocket-1.4.1/examples/autobahn/server.go000066400000000000000000000171011353036111300207530ustar00rootroot00000000000000// Copyright 2013 The Gorilla WebSocket Authors. All rights reserved. // Use of this source code is governed by a BSD-style // license that can be found in the LICENSE file. // Command server is a test server for the Autobahn WebSockets Test Suite. package main import ( "errors" "flag" "io" "log" "net/http" "time" "unicode/utf8" "github.com/gorilla/websocket" ) var upgrader = websocket.Upgrader{ ReadBufferSize: 4096, WriteBufferSize: 4096, EnableCompression: true, CheckOrigin: func(r *http.Request) bool { return true }, } // echoCopy echoes messages from the client using io.Copy. func echoCopy(w http.ResponseWriter, r *http.Request, writerOnly bool) { conn, err := upgrader.Upgrade(w, r, nil) if err != nil { log.Println("Upgrade:", err) return } defer conn.Close() for { mt, r, err := conn.NextReader() if err != nil { if err != io.EOF { log.Println("NextReader:", err) } return } if mt == websocket.TextMessage { r = &validator{r: r} } w, err := conn.NextWriter(mt) if err != nil { log.Println("NextWriter:", err) return } if mt == websocket.TextMessage { r = &validator{r: r} } if writerOnly { _, err = io.Copy(struct{ io.Writer }{w}, r) } else { _, err = io.Copy(w, r) } if err != nil { if err == errInvalidUTF8 { conn.WriteControl(websocket.CloseMessage, websocket.FormatCloseMessage(websocket.CloseInvalidFramePayloadData, ""), time.Time{}) } log.Println("Copy:", err) return } err = w.Close() if err != nil { log.Println("Close:", err) return } } } func echoCopyWriterOnly(w http.ResponseWriter, r *http.Request) { echoCopy(w, r, true) } func echoCopyFull(w http.ResponseWriter, r *http.Request) { echoCopy(w, r, false) } // echoReadAll echoes messages from the client by reading the entire message // with ioutil.ReadAll. func echoReadAll(w http.ResponseWriter, r *http.Request, writeMessage, writePrepared bool) { conn, err := upgrader.Upgrade(w, r, nil) if err != nil { log.Println("Upgrade:", err) return } defer conn.Close() for { mt, b, err := conn.ReadMessage() if err != nil { if err != io.EOF { log.Println("NextReader:", err) } return } if mt == websocket.TextMessage { if !utf8.Valid(b) { conn.WriteControl(websocket.CloseMessage, websocket.FormatCloseMessage(websocket.CloseInvalidFramePayloadData, ""), time.Time{}) log.Println("ReadAll: invalid utf8") } } if writeMessage { if !writePrepared { err = conn.WriteMessage(mt, b) if err != nil { log.Println("WriteMessage:", err) } } else { pm, err := websocket.NewPreparedMessage(mt, b) if err != nil { log.Println("NewPreparedMessage:", err) return } err = conn.WritePreparedMessage(pm) if err != nil { log.Println("WritePreparedMessage:", err) } } } else { w, err := conn.NextWriter(mt) if err != nil { log.Println("NextWriter:", err) return } if _, err := w.Write(b); err != nil { log.Println("Writer:", err) return } if err := w.Close(); err != nil { log.Println("Close:", err) return } } } } func echoReadAllWriter(w http.ResponseWriter, r *http.Request) { echoReadAll(w, r, false, false) } func echoReadAllWriteMessage(w http.ResponseWriter, r *http.Request) { echoReadAll(w, r, true, false) } func echoReadAllWritePreparedMessage(w http.ResponseWriter, r *http.Request) { echoReadAll(w, r, true, true) } func serveHome(w http.ResponseWriter, r *http.Request) { if r.URL.Path != "/" { http.Error(w, "Not found.", http.StatusNotFound) return } if r.Method != "GET" { http.Error(w, "Method not allowed", http.StatusMethodNotAllowed) return } w.Header().Set("Content-Type", "text/html; charset=utf-8") io.WriteString(w, "Echo Server") } var addr = flag.String("addr", ":9000", "http service address") func main() { flag.Parse() http.HandleFunc("/", serveHome) http.HandleFunc("/c", echoCopyWriterOnly) http.HandleFunc("/f", echoCopyFull) http.HandleFunc("/r", echoReadAllWriter) http.HandleFunc("/m", echoReadAllWriteMessage) http.HandleFunc("/p", echoReadAllWritePreparedMessage) err := http.ListenAndServe(*addr, nil) if err != nil { log.Fatal("ListenAndServe: ", err) } } type validator struct { state int x rune r io.Reader } var errInvalidUTF8 = errors.New("invalid utf8") func (r *validator) Read(p []byte) (int, error) { n, err := r.r.Read(p) state := r.state x := r.x for _, b := range p[:n] { state, x = decode(state, x, b) if state == utf8Reject { break } } r.state = state r.x = x if state == utf8Reject || (err == io.EOF && state != utf8Accept) { return n, errInvalidUTF8 } return n, err } // UTF-8 decoder from http://bjoern.hoehrmann.de/utf-8/decoder/dfa/ // // Copyright (c) 2008-2009 Bjoern Hoehrmann // // 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. var utf8d = [...]byte{ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // 00..1f 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // 20..3f 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // 40..5f 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // 60..7f 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, // 80..9f 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, // a0..bf 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, // c0..df 0xa, 0x3, 0x3, 0x3, 0x3, 0x3, 0x3, 0x3, 0x3, 0x3, 0x3, 0x3, 0x3, 0x4, 0x3, 0x3, // e0..ef 0xb, 0x6, 0x6, 0x6, 0x5, 0x8, 0x8, 0x8, 0x8, 0x8, 0x8, 0x8, 0x8, 0x8, 0x8, 0x8, // f0..ff 0x0, 0x1, 0x2, 0x3, 0x5, 0x8, 0x7, 0x1, 0x1, 0x1, 0x4, 0x6, 0x1, 0x1, 0x1, 0x1, // s0..s0 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 1, 1, 1, 1, 1, 0, 1, 0, 1, 1, 1, 1, 1, 1, // s1..s2 1, 2, 1, 1, 1, 1, 1, 2, 1, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 2, 1, 1, 1, 1, 1, 1, 1, 1, // s3..s4 1, 2, 1, 1, 1, 1, 1, 1, 1, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 3, 1, 3, 1, 1, 1, 1, 1, 1, // s5..s6 1, 3, 1, 1, 1, 1, 1, 3, 1, 3, 1, 1, 1, 1, 1, 1, 1, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, // s7..s8 } const ( utf8Accept = 0 utf8Reject = 1 ) func decode(state int, x rune, b byte) (int, rune) { t := utf8d[b] if state != utf8Accept { x = rune(b&0x3f) | (x << 6) } else { x = rune((0xff >> t) & b) } state = int(utf8d[256+state*16+int(t)]) return state, x } websocket-1.4.1/examples/chat/000077500000000000000000000000001353036111300162345ustar00rootroot00000000000000websocket-1.4.1/examples/chat/README.md000066400000000000000000000111471353036111300175170ustar00rootroot00000000000000# Chat Example This application shows how to use the [websocket](https://github.com/gorilla/websocket) package to implement a simple web chat application. ## Running the example The example requires a working Go development environment. The [Getting Started](http://golang.org/doc/install) page describes how to install the development environment. Once you have Go up and running, you can download, build and run the example using the following commands. $ go get github.com/gorilla/websocket $ cd `go list -f '{{.Dir}}' github.com/gorilla/websocket/examples/chat` $ go run *.go To use the chat example, open http://localhost:8080/ in your browser. ## Server The server application defines two types, `Client` and `Hub`. The server creates an instance of the `Client` type for each websocket connection. A `Client` acts as an intermediary between the websocket connection and a single instance of the `Hub` type. The `Hub` maintains a set of registered clients and broadcasts messages to the clients. The application runs one goroutine for the `Hub` and two goroutines for each `Client`. The goroutines communicate with each other using channels. The `Hub` has channels for registering clients, unregistering clients and broadcasting messages. A `Client` has a buffered channel of outbound messages. One of the client's goroutines reads messages from this channel and writes the messages to the websocket. The other client goroutine reads messages from the websocket and sends them to the hub. ### Hub The code for the `Hub` type is in [hub.go](https://github.com/gorilla/websocket/blob/master/examples/chat/hub.go). The application's `main` function starts the hub's `run` method as a goroutine. Clients send requests to the hub using the `register`, `unregister` and `broadcast` channels. The hub registers clients by adding the client pointer as a key in the `clients` map. The map value is always true. The unregister code is a little more complicated. In addition to deleting the client pointer from the `clients` map, the hub closes the clients's `send` channel to signal the client that no more messages will be sent to the client. The hub handles messages by looping over the registered clients and sending the message to the client's `send` channel. If the client's `send` buffer is full, then the hub assumes that the client is dead or stuck. In this case, the hub unregisters the client and closes the websocket. ### Client The code for the `Client` type is in [client.go](https://github.com/gorilla/websocket/blob/master/examples/chat/client.go). The `serveWs` function is registered by the application's `main` function as an HTTP handler. The handler upgrades the HTTP connection to the WebSocket protocol, creates a client, registers the client with the hub and schedules the client to be unregistered using a defer statement. Next, the HTTP handler starts the client's `writePump` method as a goroutine. This method transfers messages from the client's send channel to the websocket connection. The writer method exits when the channel is closed by the hub or there's an error writing to the websocket connection. Finally, the HTTP handler calls the client's `readPump` method. This method transfers inbound messages from the websocket to the hub. WebSocket connections [support one concurrent reader and one concurrent writer](https://godoc.org/github.com/gorilla/websocket#hdr-Concurrency). The application ensures that these concurrency requirements are met by executing all reads from the `readPump` goroutine and all writes from the `writePump` goroutine. To improve efficiency under high load, the `writePump` function coalesces pending chat messages in the `send` channel to a single WebSocket message. This reduces the number of system calls and the amount of data sent over the network. ## Frontend The frontend code is in [home.html](https://github.com/gorilla/websocket/blob/master/examples/chat/home.html). On document load, the script checks for websocket functionality in the browser. If websocket functionality is available, then the script opens a connection to the server and registers a callback to handle messages from the server. The callback appends the message to the chat log using the appendLog function. To allow the user to manually scroll through the chat log without interruption from new messages, the `appendLog` function checks the scroll position before adding new content. If the chat log is scrolled to the bottom, then the function scrolls new content into view after adding the content. Otherwise, the scroll position is not changed. The form handler writes the user input to the websocket and clears the input field. websocket-1.4.1/examples/chat/client.go000066400000000000000000000065411353036111300200470ustar00rootroot00000000000000// Copyright 2013 The Gorilla WebSocket 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 main import ( "bytes" "log" "net/http" "time" "github.com/gorilla/websocket" ) const ( // Time allowed to write a message to the peer. writeWait = 10 * time.Second // Time allowed to read the next pong message from the peer. pongWait = 60 * time.Second // Send pings to peer with this period. Must be less than pongWait. pingPeriod = (pongWait * 9) / 10 // Maximum message size allowed from peer. maxMessageSize = 512 ) var ( newline = []byte{'\n'} space = []byte{' '} ) var upgrader = websocket.Upgrader{ ReadBufferSize: 1024, WriteBufferSize: 1024, } // Client is a middleman between the websocket connection and the hub. type Client struct { hub *Hub // The websocket connection. conn *websocket.Conn // Buffered channel of outbound messages. send chan []byte } // readPump pumps messages from the websocket connection to the hub. // // The application runs readPump in a per-connection goroutine. The application // ensures that there is at most one reader on a connection by executing all // reads from this goroutine. func (c *Client) readPump() { defer func() { c.hub.unregister <- c c.conn.Close() }() c.conn.SetReadLimit(maxMessageSize) c.conn.SetReadDeadline(time.Now().Add(pongWait)) c.conn.SetPongHandler(func(string) error { c.conn.SetReadDeadline(time.Now().Add(pongWait)); return nil }) for { _, message, err := c.conn.ReadMessage() if err != nil { if websocket.IsUnexpectedCloseError(err, websocket.CloseGoingAway, websocket.CloseAbnormalClosure) { log.Printf("error: %v", err) } break } message = bytes.TrimSpace(bytes.Replace(message, newline, space, -1)) c.hub.broadcast <- message } } // writePump pumps messages from the hub to the websocket connection. // // A goroutine running writePump is started for each connection. The // application ensures that there is at most one writer to a connection by // executing all writes from this goroutine. func (c *Client) writePump() { ticker := time.NewTicker(pingPeriod) defer func() { ticker.Stop() c.conn.Close() }() for { select { case message, ok := <-c.send: c.conn.SetWriteDeadline(time.Now().Add(writeWait)) if !ok { // The hub closed the channel. c.conn.WriteMessage(websocket.CloseMessage, []byte{}) return } w, err := c.conn.NextWriter(websocket.TextMessage) if err != nil { return } w.Write(message) // Add queued chat messages to the current websocket message. n := len(c.send) for i := 0; i < n; i++ { w.Write(newline) w.Write(<-c.send) } if err := w.Close(); err != nil { return } case <-ticker.C: c.conn.SetWriteDeadline(time.Now().Add(writeWait)) if err := c.conn.WriteMessage(websocket.PingMessage, nil); err != nil { return } } } } // serveWs handles websocket requests from the peer. func serveWs(hub *Hub, w http.ResponseWriter, r *http.Request) { conn, err := upgrader.Upgrade(w, r, nil) if err != nil { log.Println(err) return } client := &Client{hub: hub, conn: conn, send: make(chan []byte, 256)} client.hub.register <- client // Allow collection of memory referenced by the caller by doing all work in // new goroutines. go client.writePump() go client.readPump() } websocket-1.4.1/examples/chat/home.html000066400000000000000000000042711353036111300200560ustar00rootroot00000000000000 Chat Example
websocket-1.4.1/examples/chat/hub.go000066400000000000000000000021741353036111300173450ustar00rootroot00000000000000// Copyright 2013 The Gorilla WebSocket 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 main // Hub maintains the set of active clients and broadcasts messages to the // clients. type Hub struct { // Registered clients. clients map[*Client]bool // Inbound messages from the clients. broadcast chan []byte // Register requests from the clients. register chan *Client // Unregister requests from clients. unregister chan *Client } func newHub() *Hub { return &Hub{ broadcast: make(chan []byte), register: make(chan *Client), unregister: make(chan *Client), clients: make(map[*Client]bool), } } func (h *Hub) run() { for { select { case client := <-h.register: h.clients[client] = true case client := <-h.unregister: if _, ok := h.clients[client]; ok { delete(h.clients, client) close(client.send) } case message := <-h.broadcast: for client := range h.clients { select { case client.send <- message: default: close(client.send) delete(h.clients, client) } } } } } websocket-1.4.1/examples/chat/main.go000066400000000000000000000015641353036111300175150ustar00rootroot00000000000000// Copyright 2013 The Gorilla WebSocket 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 main import ( "flag" "log" "net/http" ) var addr = flag.String("addr", ":8080", "http service address") func serveHome(w http.ResponseWriter, r *http.Request) { log.Println(r.URL) if r.URL.Path != "/" { http.Error(w, "Not found", http.StatusNotFound) return } if r.Method != "GET" { http.Error(w, "Method not allowed", http.StatusMethodNotAllowed) return } http.ServeFile(w, r, "home.html") } func main() { flag.Parse() hub := newHub() go hub.run() http.HandleFunc("/", serveHome) http.HandleFunc("/ws", func(w http.ResponseWriter, r *http.Request) { serveWs(hub, w, r) }) err := http.ListenAndServe(*addr, nil) if err != nil { log.Fatal("ListenAndServe: ", err) } } websocket-1.4.1/examples/command/000077500000000000000000000000001353036111300167335ustar00rootroot00000000000000websocket-1.4.1/examples/command/README.md000066400000000000000000000011501353036111300202070ustar00rootroot00000000000000# Command example This example connects a websocket connection to stdin and stdout of a command. Received messages are written to stdin followed by a `\n`. Each line read from standard out is sent as a message to the client. $ go get github.com/gorilla/websocket $ cd `go list -f '{{.Dir}}' github.com/gorilla/websocket/examples/command` $ go run main.go # Open http://localhost:8080/ . Try the following commands. # Echo sent messages to the output area. $ go run main.go cat # Run a shell.Try sending "ls" and "cat main.go". $ go run main.go sh websocket-1.4.1/examples/command/home.html000066400000000000000000000043271353036111300205570ustar00rootroot00000000000000 Command Example
websocket-1.4.1/examples/command/main.go000066400000000000000000000101071353036111300202050ustar00rootroot00000000000000// Copyright 2015 The Gorilla WebSocket 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 main import ( "bufio" "flag" "io" "log" "net/http" "os" "os/exec" "time" "github.com/gorilla/websocket" ) var ( addr = flag.String("addr", "127.0.0.1:8080", "http service address") cmdPath string ) const ( // Time allowed to write a message to the peer. writeWait = 10 * time.Second // Maximum message size allowed from peer. maxMessageSize = 8192 // Time allowed to read the next pong message from the peer. pongWait = 60 * time.Second // Send pings to peer with this period. Must be less than pongWait. pingPeriod = (pongWait * 9) / 10 // Time to wait before force close on connection. closeGracePeriod = 10 * time.Second ) func pumpStdin(ws *websocket.Conn, w io.Writer) { defer ws.Close() ws.SetReadLimit(maxMessageSize) ws.SetReadDeadline(time.Now().Add(pongWait)) ws.SetPongHandler(func(string) error { ws.SetReadDeadline(time.Now().Add(pongWait)); return nil }) for { _, message, err := ws.ReadMessage() if err != nil { break } message = append(message, '\n') if _, err := w.Write(message); err != nil { break } } } func pumpStdout(ws *websocket.Conn, r io.Reader, done chan struct{}) { defer func() { }() s := bufio.NewScanner(r) for s.Scan() { ws.SetWriteDeadline(time.Now().Add(writeWait)) if err := ws.WriteMessage(websocket.TextMessage, s.Bytes()); err != nil { ws.Close() break } } if s.Err() != nil { log.Println("scan:", s.Err()) } close(done) ws.SetWriteDeadline(time.Now().Add(writeWait)) ws.WriteMessage(websocket.CloseMessage, websocket.FormatCloseMessage(websocket.CloseNormalClosure, "")) time.Sleep(closeGracePeriod) ws.Close() } func ping(ws *websocket.Conn, done chan struct{}) { ticker := time.NewTicker(pingPeriod) defer ticker.Stop() for { select { case <-ticker.C: if err := ws.WriteControl(websocket.PingMessage, []byte{}, time.Now().Add(writeWait)); err != nil { log.Println("ping:", err) } case <-done: return } } } func internalError(ws *websocket.Conn, msg string, err error) { log.Println(msg, err) ws.WriteMessage(websocket.TextMessage, []byte("Internal server error.")) } var upgrader = websocket.Upgrader{} func serveWs(w http.ResponseWriter, r *http.Request) { ws, err := upgrader.Upgrade(w, r, nil) if err != nil { log.Println("upgrade:", err) return } defer ws.Close() outr, outw, err := os.Pipe() if err != nil { internalError(ws, "stdout:", err) return } defer outr.Close() defer outw.Close() inr, inw, err := os.Pipe() if err != nil { internalError(ws, "stdin:", err) return } defer inr.Close() defer inw.Close() proc, err := os.StartProcess(cmdPath, flag.Args(), &os.ProcAttr{ Files: []*os.File{inr, outw, outw}, }) if err != nil { internalError(ws, "start:", err) return } inr.Close() outw.Close() stdoutDone := make(chan struct{}) go pumpStdout(ws, outr, stdoutDone) go ping(ws, stdoutDone) pumpStdin(ws, inw) // Some commands will exit when stdin is closed. inw.Close() // Other commands need a bonk on the head. if err := proc.Signal(os.Interrupt); err != nil { log.Println("inter:", err) } select { case <-stdoutDone: case <-time.After(time.Second): // A bigger bonk on the head. if err := proc.Signal(os.Kill); err != nil { log.Println("term:", err) } <-stdoutDone } if _, err := proc.Wait(); err != nil { log.Println("wait:", err) } } func serveHome(w http.ResponseWriter, r *http.Request) { if r.URL.Path != "/" { http.Error(w, "Not found", http.StatusNotFound) return } if r.Method != "GET" { http.Error(w, "Method not allowed", http.StatusMethodNotAllowed) return } http.ServeFile(w, r, "home.html") } func main() { flag.Parse() if len(flag.Args()) < 1 { log.Fatal("must specify at least one argument") } var err error cmdPath, err = exec.LookPath(flag.Args()[0]) if err != nil { log.Fatal(err) } http.HandleFunc("/", serveHome) http.HandleFunc("/ws", serveWs) log.Fatal(http.ListenAndServe(*addr, nil)) } websocket-1.4.1/examples/echo/000077500000000000000000000000001353036111300162335ustar00rootroot00000000000000websocket-1.4.1/examples/echo/README.md000066400000000000000000000006761353036111300175230ustar00rootroot00000000000000# Client and server example This example shows a simple client and server. The server echoes messages sent to it. The client sends a message every second and prints all messages received. To run the example, start the server: $ go run server.go Next, start the client: $ go run client.go The server includes a simple web client. To use the client, open http://127.0.0.1:8080 in the browser and follow the instructions on the page. websocket-1.4.1/examples/echo/client.go000066400000000000000000000032071353036111300200420ustar00rootroot00000000000000// Copyright 2015 The Gorilla WebSocket Authors. All rights reserved. // Use of this source code is governed by a BSD-style // license that can be found in the LICENSE file. // +build ignore package main import ( "flag" "log" "net/url" "os" "os/signal" "time" "github.com/gorilla/websocket" ) var addr = flag.String("addr", "localhost:8080", "http service address") func main() { flag.Parse() log.SetFlags(0) interrupt := make(chan os.Signal, 1) signal.Notify(interrupt, os.Interrupt) u := url.URL{Scheme: "ws", Host: *addr, Path: "/echo"} log.Printf("connecting to %s", u.String()) c, _, err := websocket.DefaultDialer.Dial(u.String(), nil) if err != nil { log.Fatal("dial:", err) } defer c.Close() done := make(chan struct{}) go func() { defer close(done) for { _, message, err := c.ReadMessage() if err != nil { log.Println("read:", err) return } log.Printf("recv: %s", message) } }() ticker := time.NewTicker(time.Second) defer ticker.Stop() for { select { case <-done: return case t := <-ticker.C: err := c.WriteMessage(websocket.TextMessage, []byte(t.String())) if err != nil { log.Println("write:", err) return } case <-interrupt: log.Println("interrupt") // Cleanly close the connection by sending a close message and then // waiting (with timeout) for the server to close the connection. err := c.WriteMessage(websocket.CloseMessage, websocket.FormatCloseMessage(websocket.CloseNormalClosure, "")) if err != nil { log.Println("write close:", err) return } select { case <-done: case <-time.After(time.Second): } return } } } websocket-1.4.1/examples/echo/server.go000066400000000000000000000056411353036111300200760ustar00rootroot00000000000000// Copyright 2015 The Gorilla WebSocket Authors. All rights reserved. // Use of this source code is governed by a BSD-style // license that can be found in the LICENSE file. // +build ignore package main import ( "flag" "html/template" "log" "net/http" "github.com/gorilla/websocket" ) var addr = flag.String("addr", "localhost:8080", "http service address") var upgrader = websocket.Upgrader{} // use default options func echo(w http.ResponseWriter, r *http.Request) { c, err := upgrader.Upgrade(w, r, nil) if err != nil { log.Print("upgrade:", err) return } defer c.Close() for { mt, message, err := c.ReadMessage() if err != nil { log.Println("read:", err) break } log.Printf("recv: %s", message) err = c.WriteMessage(mt, message) if err != nil { log.Println("write:", err) break } } } func home(w http.ResponseWriter, r *http.Request) { homeTemplate.Execute(w, "ws://"+r.Host+"/echo") } func main() { flag.Parse() log.SetFlags(0) http.HandleFunc("/echo", echo) http.HandleFunc("/", home) log.Fatal(http.ListenAndServe(*addr, nil)) } var homeTemplate = template.Must(template.New("").Parse(`

Click "Open" to create a connection to the server, "Send" to send a message to the server and "Close" to close the connection. You can change the message and send multiple times.

`)) websocket-1.4.1/examples/filewatch/000077500000000000000000000000001353036111300172635ustar00rootroot00000000000000websocket-1.4.1/examples/filewatch/README.md000066400000000000000000000005661353036111300205510ustar00rootroot00000000000000# File Watch example. This example sends a file to the browser client for display whenever the file is modified. $ go get github.com/gorilla/websocket $ cd `go list -f '{{.Dir}}' github.com/gorilla/websocket/examples/filewatch` $ go run main.go # Open http://localhost:8080/ . # Modify the file to see it update in the browser. websocket-1.4.1/examples/filewatch/main.go000066400000000000000000000104161353036111300205400ustar00rootroot00000000000000// Copyright 2013 The Gorilla WebSocket 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 main import ( "flag" "html/template" "io/ioutil" "log" "net/http" "os" "strconv" "time" "github.com/gorilla/websocket" ) const ( // Time allowed to write the file to the client. writeWait = 10 * time.Second // Time allowed to read the next pong message from the client. pongWait = 60 * time.Second // Send pings to client with this period. Must be less than pongWait. pingPeriod = (pongWait * 9) / 10 // Poll file for changes with this period. filePeriod = 10 * time.Second ) var ( addr = flag.String("addr", ":8080", "http service address") homeTempl = template.Must(template.New("").Parse(homeHTML)) filename string upgrader = websocket.Upgrader{ ReadBufferSize: 1024, WriteBufferSize: 1024, } ) func readFileIfModified(lastMod time.Time) ([]byte, time.Time, error) { fi, err := os.Stat(filename) if err != nil { return nil, lastMod, err } if !fi.ModTime().After(lastMod) { return nil, lastMod, nil } p, err := ioutil.ReadFile(filename) if err != nil { return nil, fi.ModTime(), err } return p, fi.ModTime(), nil } func reader(ws *websocket.Conn) { defer ws.Close() ws.SetReadLimit(512) ws.SetReadDeadline(time.Now().Add(pongWait)) ws.SetPongHandler(func(string) error { ws.SetReadDeadline(time.Now().Add(pongWait)); return nil }) for { _, _, err := ws.ReadMessage() if err != nil { break } } } func writer(ws *websocket.Conn, lastMod time.Time) { lastError := "" pingTicker := time.NewTicker(pingPeriod) fileTicker := time.NewTicker(filePeriod) defer func() { pingTicker.Stop() fileTicker.Stop() ws.Close() }() for { select { case <-fileTicker.C: var p []byte var err error p, lastMod, err = readFileIfModified(lastMod) if err != nil { if s := err.Error(); s != lastError { lastError = s p = []byte(lastError) } } else { lastError = "" } if p != nil { ws.SetWriteDeadline(time.Now().Add(writeWait)) if err := ws.WriteMessage(websocket.TextMessage, p); err != nil { return } } case <-pingTicker.C: ws.SetWriteDeadline(time.Now().Add(writeWait)) if err := ws.WriteMessage(websocket.PingMessage, []byte{}); err != nil { return } } } } func serveWs(w http.ResponseWriter, r *http.Request) { ws, err := upgrader.Upgrade(w, r, nil) if err != nil { if _, ok := err.(websocket.HandshakeError); !ok { log.Println(err) } return } var lastMod time.Time if n, err := strconv.ParseInt(r.FormValue("lastMod"), 16, 64); err == nil { lastMod = time.Unix(0, n) } go writer(ws, lastMod) reader(ws) } func serveHome(w http.ResponseWriter, r *http.Request) { if r.URL.Path != "/" { http.Error(w, "Not found", http.StatusNotFound) return } if r.Method != "GET" { http.Error(w, "Method not allowed", http.StatusMethodNotAllowed) return } w.Header().Set("Content-Type", "text/html; charset=utf-8") p, lastMod, err := readFileIfModified(time.Time{}) if err != nil { p = []byte(err.Error()) lastMod = time.Unix(0, 0) } var v = struct { Host string Data string LastMod string }{ r.Host, string(p), strconv.FormatInt(lastMod.UnixNano(), 16), } homeTempl.Execute(w, &v) } func main() { flag.Parse() if flag.NArg() != 1 { log.Fatal("filename not specified") } filename = flag.Args()[0] http.HandleFunc("/", serveHome) http.HandleFunc("/ws", serveWs) if err := http.ListenAndServe(*addr, nil); err != nil { log.Fatal(err) } } const homeHTML = ` WebSocket Example 
{{.Data}}
` websocket-1.4.1/go.mod000066400000000000000000000000551353036111300146050ustar00rootroot00000000000000module github.com/gorilla/websocket go 1.12 websocket-1.4.1/go.sum000066400000000000000000000002571353036111300146360ustar00rootroot00000000000000github.com/gorilla/websocket v1.4.0 h1:WDFjx/TMzVgy9VdMMQi2K2Emtwi2QcUQsztZ/zLaH/Q= github.com/gorilla/websocket v1.4.0/go.mod h1:E7qHFY5m1UJ88s3WnNqhKjPHQ0heANvMoAMk2YaljkQ= websocket-1.4.1/join.go000066400000000000000000000016211353036111300147650ustar00rootroot00000000000000// Copyright 2019 The Gorilla WebSocket 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 websocket import ( "io" "strings" ) // JoinMessages concatenates received messages to create a single io.Reader. // The string term is appended to each message. The returned reader does not // support concurrent calls to the Read method. func JoinMessages(c *Conn, term string) io.Reader { return &joinReader{c: c, term: term} } type joinReader struct { c *Conn term string r io.Reader } func (r *joinReader) Read(p []byte) (int, error) { if r.r == nil { var err error _, r.r, err = r.c.NextReader() if err != nil { return 0, err } if r.term != "" { r.r = io.MultiReader(r.r, strings.NewReader(r.term)) } } n, err := r.r.Read(p) if err == io.EOF { err = nil r.r = nil } return n, err } websocket-1.4.1/join_test.go000066400000000000000000000021201353036111300160170ustar00rootroot00000000000000// Copyright 2019 The Gorilla WebSocket 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 websocket import ( "bytes" "io" "strings" "testing" ) func TestJoinMessages(t *testing.T) { messages := []string{"a", "bc", "def", "ghij", "klmno", "0", "12", "345", "6789"} for _, readChunk := range []int{1, 2, 3, 4, 5, 6, 7} { for _, term := range []string{"", ","} { var connBuf bytes.Buffer wc := newTestConn(nil, &connBuf, true) rc := newTestConn(&connBuf, nil, false) for _, m := range messages { wc.WriteMessage(BinaryMessage, []byte(m)) } var result bytes.Buffer _, err := io.CopyBuffer(&result, JoinMessages(rc, term), make([]byte, readChunk)) if IsUnexpectedCloseError(err, CloseAbnormalClosure) { t.Errorf("readChunk=%d, term=%q: unexpected error %v", readChunk, term, err) } want := strings.Join(messages, term) + term if result.String() != want { t.Errorf("readChunk=%d, term=%q, got %q, want %q", readChunk, term, result.String(), want) } } } } websocket-1.4.1/json.go000066400000000000000000000027611353036111300150050ustar00rootroot00000000000000// Copyright 2013 The Gorilla WebSocket 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 websocket import ( "encoding/json" "io" ) // WriteJSON writes the JSON encoding of v as a message. // // Deprecated: Use c.WriteJSON instead. func WriteJSON(c *Conn, v interface{}) error { return c.WriteJSON(v) } // WriteJSON writes the JSON encoding of v as a message. // // See the documentation for encoding/json Marshal for details about the // conversion of Go values to JSON. func (c *Conn) WriteJSON(v interface{}) error { w, err := c.NextWriter(TextMessage) if err != nil { return err } err1 := json.NewEncoder(w).Encode(v) err2 := w.Close() if err1 != nil { return err1 } return err2 } // ReadJSON reads the next JSON-encoded message from the connection and stores // it in the value pointed to by v. // // Deprecated: Use c.ReadJSON instead. func ReadJSON(c *Conn, v interface{}) error { return c.ReadJSON(v) } // ReadJSON reads the next JSON-encoded message from the connection and stores // it in the value pointed to by v. // // See the documentation for the encoding/json Unmarshal function for details // about the conversion of JSON to a Go value. func (c *Conn) ReadJSON(v interface{}) error { _, r, err := c.NextReader() if err != nil { return err } err = json.NewDecoder(r).Decode(v) if err == io.EOF { // One value is expected in the message. err = io.ErrUnexpectedEOF } return err } websocket-1.4.1/json_test.go000066400000000000000000000040611353036111300160370ustar00rootroot00000000000000// Copyright 2013 The Gorilla WebSocket 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 websocket import ( "bytes" "encoding/json" "io" "reflect" "testing" ) func TestJSON(t *testing.T) { var buf bytes.Buffer wc := newTestConn(nil, &buf, true) rc := newTestConn(&buf, nil, false) var actual, expect struct { A int B string } expect.A = 1 expect.B = "hello" if err := wc.WriteJSON(&expect); err != nil { t.Fatal("write", err) } if err := rc.ReadJSON(&actual); err != nil { t.Fatal("read", err) } if !reflect.DeepEqual(&actual, &expect) { t.Fatal("equal", actual, expect) } } func TestPartialJSONRead(t *testing.T) { var buf0, buf1 bytes.Buffer wc := newTestConn(nil, &buf0, true) rc := newTestConn(&buf0, &buf1, false) var v struct { A int B string } v.A = 1 v.B = "hello" messageCount := 0 // Partial JSON values. data, err := json.Marshal(v) if err != nil { t.Fatal(err) } for i := len(data) - 1; i >= 0; i-- { if err := wc.WriteMessage(TextMessage, data[:i]); err != nil { t.Fatal(err) } messageCount++ } // Whitespace. if err := wc.WriteMessage(TextMessage, []byte(" ")); err != nil { t.Fatal(err) } messageCount++ // Close. if err := wc.WriteMessage(CloseMessage, FormatCloseMessage(CloseNormalClosure, "")); err != nil { t.Fatal(err) } for i := 0; i < messageCount; i++ { err := rc.ReadJSON(&v) if err != io.ErrUnexpectedEOF { t.Error("read", i, err) } } err = rc.ReadJSON(&v) if _, ok := err.(*CloseError); !ok { t.Error("final", err) } } func TestDeprecatedJSON(t *testing.T) { var buf bytes.Buffer wc := newTestConn(nil, &buf, true) rc := newTestConn(&buf, nil, false) var actual, expect struct { A int B string } expect.A = 1 expect.B = "hello" if err := WriteJSON(wc, &expect); err != nil { t.Fatal("write", err) } if err := ReadJSON(rc, &actual); err != nil { t.Fatal("read", err) } if !reflect.DeepEqual(&actual, &expect) { t.Fatal("equal", actual, expect) } } websocket-1.4.1/mask.go000066400000000000000000000022021353036111300147550ustar00rootroot00000000000000// Copyright 2016 The Gorilla WebSocket Authors. All rights reserved. Use of // this source code is governed by a BSD-style license that can be found in the // LICENSE file. // +build !appengine package websocket import "unsafe" const wordSize = int(unsafe.Sizeof(uintptr(0))) func maskBytes(key [4]byte, pos int, b []byte) int { // Mask one byte at a time for small buffers. if len(b) < 2*wordSize { for i := range b { b[i] ^= key[pos&3] pos++ } return pos & 3 } // Mask one byte at a time to word boundary. if n := int(uintptr(unsafe.Pointer(&b[0]))) % wordSize; n != 0 { n = wordSize - n for i := range b[:n] { b[i] ^= key[pos&3] pos++ } b = b[n:] } // Create aligned word size key. var k [wordSize]byte for i := range k { k[i] = key[(pos+i)&3] } kw := *(*uintptr)(unsafe.Pointer(&k)) // Mask one word at a time. n := (len(b) / wordSize) * wordSize for i := 0; i < n; i += wordSize { *(*uintptr)(unsafe.Pointer(uintptr(unsafe.Pointer(&b[0])) + uintptr(i))) ^= kw } // Mask one byte at a time for remaining bytes. b = b[n:] for i := range b { b[i] ^= key[pos&3] pos++ } return pos & 3 } websocket-1.4.1/mask_safe.go000066400000000000000000000005231353036111300157570ustar00rootroot00000000000000// Copyright 2016 The Gorilla WebSocket Authors. All rights reserved. Use of // this source code is governed by a BSD-style license that can be found in the // LICENSE file. // +build appengine package websocket func maskBytes(key [4]byte, pos int, b []byte) int { for i := range b { b[i] ^= key[pos&3] pos++ } return pos & 3 } websocket-1.4.1/mask_test.go000066400000000000000000000030711353036111300160210ustar00rootroot00000000000000// Copyright 2016 The Gorilla WebSocket Authors. All rights reserved. Use of // this source code is governed by a BSD-style license that can be found in the // LICENSE file. // !appengine package websocket import ( "fmt" "testing" ) func maskBytesByByte(key [4]byte, pos int, b []byte) int { for i := range b { b[i] ^= key[pos&3] pos++ } return pos & 3 } func notzero(b []byte) int { for i := range b { if b[i] != 0 { return i } } return -1 } func TestMaskBytes(t *testing.T) { key := [4]byte{1, 2, 3, 4} for size := 1; size <= 1024; size++ { for align := 0; align < wordSize; align++ { for pos := 0; pos < 4; pos++ { b := make([]byte, size+align)[align:] maskBytes(key, pos, b) maskBytesByByte(key, pos, b) if i := notzero(b); i >= 0 { t.Errorf("size:%d, align:%d, pos:%d, offset:%d", size, align, pos, i) } } } } } func BenchmarkMaskBytes(b *testing.B) { for _, size := range []int{2, 4, 8, 16, 32, 512, 1024} { b.Run(fmt.Sprintf("size-%d", size), func(b *testing.B) { for _, align := range []int{wordSize / 2} { b.Run(fmt.Sprintf("align-%d", align), func(b *testing.B) { for _, fn := range []struct { name string fn func(key [4]byte, pos int, b []byte) int }{ {"byte", maskBytesByByte}, {"word", maskBytes}, } { b.Run(fn.name, func(b *testing.B) { key := newMaskKey() data := make([]byte, size+align)[align:] for i := 0; i < b.N; i++ { fn.fn(key, 0, data) } b.SetBytes(int64(len(data))) }) } }) } }) } } websocket-1.4.1/prepared.go000066400000000000000000000056171353036111300156410ustar00rootroot00000000000000// Copyright 2017 The Gorilla WebSocket 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 websocket import ( "bytes" "net" "sync" "time" ) // PreparedMessage caches on the wire representations of a message payload. // Use PreparedMessage to efficiently send a message payload to multiple // connections. PreparedMessage is especially useful when compression is used // because the CPU and memory expensive compression operation can be executed // once for a given set of compression options. type PreparedMessage struct { messageType int data []byte mu sync.Mutex frames map[prepareKey]*preparedFrame } // prepareKey defines a unique set of options to cache prepared frames in PreparedMessage. type prepareKey struct { isServer bool compress bool compressionLevel int } // preparedFrame contains data in wire representation. type preparedFrame struct { once sync.Once data []byte } // NewPreparedMessage returns an initialized PreparedMessage. You can then send // it to connection using WritePreparedMessage method. Valid wire // representation will be calculated lazily only once for a set of current // connection options. func NewPreparedMessage(messageType int, data []byte) (*PreparedMessage, error) { pm := &PreparedMessage{ messageType: messageType, frames: make(map[prepareKey]*preparedFrame), data: data, } // Prepare a plain server frame. _, frameData, err := pm.frame(prepareKey{isServer: true, compress: false}) if err != nil { return nil, err } // To protect against caller modifying the data argument, remember the data // copied to the plain server frame. pm.data = frameData[len(frameData)-len(data):] return pm, nil } func (pm *PreparedMessage) frame(key prepareKey) (int, []byte, error) { pm.mu.Lock() frame, ok := pm.frames[key] if !ok { frame = &preparedFrame{} pm.frames[key] = frame } pm.mu.Unlock() var err error frame.once.Do(func() { // Prepare a frame using a 'fake' connection. // TODO: Refactor code in conn.go to allow more direct construction of // the frame. mu := make(chan bool, 1) mu <- true var nc prepareConn c := &Conn{ conn: &nc, mu: mu, isServer: key.isServer, compressionLevel: key.compressionLevel, enableWriteCompression: true, writeBuf: make([]byte, defaultWriteBufferSize+maxFrameHeaderSize), } if key.compress { c.newCompressionWriter = compressNoContextTakeover } err = c.WriteMessage(pm.messageType, pm.data) frame.data = nc.buf.Bytes() }) return pm.messageType, frame.data, err } type prepareConn struct { buf bytes.Buffer net.Conn } func (pc *prepareConn) Write(p []byte) (int, error) { return pc.buf.Write(p) } func (pc *prepareConn) SetWriteDeadline(t time.Time) error { return nil } websocket-1.4.1/prepared_test.go000066400000000000000000000035501353036111300166720ustar00rootroot00000000000000// Copyright 2017 The Gorilla WebSocket 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 websocket import ( "bytes" "compress/flate" "math/rand" "testing" ) var preparedMessageTests = []struct { messageType int isServer bool enableWriteCompression bool compressionLevel int }{ // Server {TextMessage, true, false, flate.BestSpeed}, {TextMessage, true, true, flate.BestSpeed}, {TextMessage, true, true, flate.BestCompression}, {PingMessage, true, false, flate.BestSpeed}, {PingMessage, true, true, flate.BestSpeed}, // Client {TextMessage, false, false, flate.BestSpeed}, {TextMessage, false, true, flate.BestSpeed}, {TextMessage, false, true, flate.BestCompression}, {PingMessage, false, false, flate.BestSpeed}, {PingMessage, false, true, flate.BestSpeed}, } func TestPreparedMessage(t *testing.T) { for _, tt := range preparedMessageTests { var data = []byte("this is a test") var buf bytes.Buffer c := newTestConn(nil, &buf, tt.isServer) if tt.enableWriteCompression { c.newCompressionWriter = compressNoContextTakeover } c.SetCompressionLevel(tt.compressionLevel) // Seed random number generator for consistent frame mask. rand.Seed(1234) if err := c.WriteMessage(tt.messageType, data); err != nil { t.Fatal(err) } want := buf.String() pm, err := NewPreparedMessage(tt.messageType, data) if err != nil { t.Fatal(err) } // Scribble on data to ensure that NewPreparedMessage takes a snapshot. copy(data, "hello world") // Seed random number generator for consistent frame mask. rand.Seed(1234) buf.Reset() if err := c.WritePreparedMessage(pm); err != nil { t.Fatal(err) } got := buf.String() if got != want { t.Errorf("write message != prepared message for %+v", tt) } } } websocket-1.4.1/proxy.go000066400000000000000000000036371353036111300152200ustar00rootroot00000000000000// Copyright 2017 The Gorilla WebSocket 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 websocket import ( "bufio" "encoding/base64" "errors" "net" "net/http" "net/url" "strings" ) type netDialerFunc func(network, addr string) (net.Conn, error) func (fn netDialerFunc) Dial(network, addr string) (net.Conn, error) { return fn(network, addr) } func init() { proxy_RegisterDialerType("http", func(proxyURL *url.URL, forwardDialer proxy_Dialer) (proxy_Dialer, error) { return &httpProxyDialer{proxyURL: proxyURL, forwardDial: forwardDialer.Dial}, nil }) } type httpProxyDialer struct { proxyURL *url.URL forwardDial func(network, addr string) (net.Conn, error) } func (hpd *httpProxyDialer) Dial(network string, addr string) (net.Conn, error) { hostPort, _ := hostPortNoPort(hpd.proxyURL) conn, err := hpd.forwardDial(network, hostPort) if err != nil { return nil, err } connectHeader := make(http.Header) if user := hpd.proxyURL.User; user != nil { proxyUser := user.Username() if proxyPassword, passwordSet := user.Password(); passwordSet { credential := base64.StdEncoding.EncodeToString([]byte(proxyUser + ":" + proxyPassword)) connectHeader.Set("Proxy-Authorization", "Basic "+credential) } } connectReq := &http.Request{ Method: "CONNECT", URL: &url.URL{Opaque: addr}, Host: addr, Header: connectHeader, } if err := connectReq.Write(conn); err != nil { conn.Close() return nil, err } // Read response. It's OK to use and discard buffered reader here becaue // the remote server does not speak until spoken to. br := bufio.NewReader(conn) resp, err := http.ReadResponse(br, connectReq) if err != nil { conn.Close() return nil, err } if resp.StatusCode != 200 { conn.Close() f := strings.SplitN(resp.Status, " ", 2) return nil, errors.New(f[1]) } return conn, nil } websocket-1.4.1/server.go000066400000000000000000000273441353036111300153460ustar00rootroot00000000000000// Copyright 2013 The Gorilla WebSocket 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 websocket import ( "bufio" "errors" "io" "net/http" "net/url" "strings" "time" ) // HandshakeError describes an error with the handshake from the peer. type HandshakeError struct { message string } func (e HandshakeError) Error() string { return e.message } // Upgrader specifies parameters for upgrading an HTTP connection to a // WebSocket connection. type Upgrader struct { // HandshakeTimeout specifies the duration for the handshake to complete. HandshakeTimeout time.Duration // ReadBufferSize and WriteBufferSize specify I/O buffer sizes in bytes. If a buffer // size is zero, then buffers allocated by the HTTP server are used. The // I/O buffer sizes do not limit the size of the messages that can be sent // or received. ReadBufferSize, WriteBufferSize int // WriteBufferPool is a pool of buffers for write operations. If the value // is not set, then write buffers are allocated to the connection for the // lifetime of the connection. // // A pool is most useful when the application has a modest volume of writes // across a large number of connections. // // Applications should use a single pool for each unique value of // WriteBufferSize. WriteBufferPool BufferPool // Subprotocols specifies the server's supported protocols in order of // preference. If this field is not nil, then the Upgrade method negotiates a // subprotocol by selecting the first match in this list with a protocol // requested by the client. If there's no match, then no protocol is // negotiated (the Sec-Websocket-Protocol header is not included in the // handshake response). Subprotocols []string // Error specifies the function for generating HTTP error responses. If Error // is nil, then http.Error is used to generate the HTTP response. Error func(w http.ResponseWriter, r *http.Request, status int, reason error) // CheckOrigin returns true if the request Origin header is acceptable. If // CheckOrigin is nil, then a safe default is used: return false if the // Origin request header is present and the origin host is not equal to // request Host header. // // A CheckOrigin function should carefully validate the request origin to // prevent cross-site request forgery. CheckOrigin func(r *http.Request) bool // EnableCompression specify if the server should attempt to negotiate per // message compression (RFC 7692). Setting this value to true does not // guarantee that compression will be supported. Currently only "no context // takeover" modes are supported. EnableCompression bool } func (u *Upgrader) returnError(w http.ResponseWriter, r *http.Request, status int, reason string) (*Conn, error) { err := HandshakeError{reason} if u.Error != nil { u.Error(w, r, status, err) } else { w.Header().Set("Sec-Websocket-Version", "13") http.Error(w, http.StatusText(status), status) } return nil, err } // checkSameOrigin returns true if the origin is not set or is equal to the request host. func checkSameOrigin(r *http.Request) bool { origin := r.Header["Origin"] if len(origin) == 0 { return true } u, err := url.Parse(origin[0]) if err != nil { return false } return equalASCIIFold(u.Host, r.Host) } func (u *Upgrader) selectSubprotocol(r *http.Request, responseHeader http.Header) string { if u.Subprotocols != nil { clientProtocols := Subprotocols(r) for _, serverProtocol := range u.Subprotocols { for _, clientProtocol := range clientProtocols { if clientProtocol == serverProtocol { return clientProtocol } } } } else if responseHeader != nil { return responseHeader.Get("Sec-Websocket-Protocol") } return "" } // Upgrade upgrades the HTTP server connection to the WebSocket protocol. // // The responseHeader is included in the response to the client's upgrade // request. Use the responseHeader to specify cookies (Set-Cookie) and the // application negotiated subprotocol (Sec-WebSocket-Protocol). // // If the upgrade fails, then Upgrade replies to the client with an HTTP error // response. func (u *Upgrader) Upgrade(w http.ResponseWriter, r *http.Request, responseHeader http.Header) (*Conn, error) { const badHandshake = "websocket: the client is not using the websocket protocol: " if !tokenListContainsValue(r.Header, "Connection", "upgrade") { return u.returnError(w, r, http.StatusBadRequest, badHandshake+"'upgrade' token not found in 'Connection' header") } if !tokenListContainsValue(r.Header, "Upgrade", "websocket") { return u.returnError(w, r, http.StatusBadRequest, badHandshake+"'websocket' token not found in 'Upgrade' header") } if r.Method != "GET" { return u.returnError(w, r, http.StatusMethodNotAllowed, badHandshake+"request method is not GET") } if !tokenListContainsValue(r.Header, "Sec-Websocket-Version", "13") { return u.returnError(w, r, http.StatusBadRequest, "websocket: unsupported version: 13 not found in 'Sec-Websocket-Version' header") } if _, ok := responseHeader["Sec-Websocket-Extensions"]; ok { return u.returnError(w, r, http.StatusInternalServerError, "websocket: application specific 'Sec-WebSocket-Extensions' headers are unsupported") } checkOrigin := u.CheckOrigin if checkOrigin == nil { checkOrigin = checkSameOrigin } if !checkOrigin(r) { return u.returnError(w, r, http.StatusForbidden, "websocket: request origin not allowed by Upgrader.CheckOrigin") } challengeKey := r.Header.Get("Sec-Websocket-Key") if challengeKey == "" { return u.returnError(w, r, http.StatusBadRequest, "websocket: not a websocket handshake: 'Sec-WebSocket-Key' header is missing or blank") } subprotocol := u.selectSubprotocol(r, responseHeader) // Negotiate PMCE var compress bool if u.EnableCompression { for _, ext := range parseExtensions(r.Header) { if ext[""] != "permessage-deflate" { continue } compress = true break } } h, ok := w.(http.Hijacker) if !ok { return u.returnError(w, r, http.StatusInternalServerError, "websocket: response does not implement http.Hijacker") } var brw *bufio.ReadWriter netConn, brw, err := h.Hijack() if err != nil { return u.returnError(w, r, http.StatusInternalServerError, err.Error()) } if brw.Reader.Buffered() > 0 { netConn.Close() return nil, errors.New("websocket: client sent data before handshake is complete") } var br *bufio.Reader if u.ReadBufferSize == 0 && bufioReaderSize(netConn, brw.Reader) > 256 { // Reuse hijacked buffered reader as connection reader. br = brw.Reader } buf := bufioWriterBuffer(netConn, brw.Writer) var writeBuf []byte if u.WriteBufferPool == nil && u.WriteBufferSize == 0 && len(buf) >= maxFrameHeaderSize+256 { // Reuse hijacked write buffer as connection buffer. writeBuf = buf } c := newConn(netConn, true, u.ReadBufferSize, u.WriteBufferSize, u.WriteBufferPool, br, writeBuf) c.subprotocol = subprotocol if compress { c.newCompressionWriter = compressNoContextTakeover c.newDecompressionReader = decompressNoContextTakeover } // Use larger of hijacked buffer and connection write buffer for header. p := buf if len(c.writeBuf) > len(p) { p = c.writeBuf } p = p[:0] p = append(p, "HTTP/1.1 101 Switching Protocols\r\nUpgrade: websocket\r\nConnection: Upgrade\r\nSec-WebSocket-Accept: "...) p = append(p, computeAcceptKey(challengeKey)...) p = append(p, "\r\n"...) if c.subprotocol != "" { p = append(p, "Sec-WebSocket-Protocol: "...) p = append(p, c.subprotocol...) p = append(p, "\r\n"...) } if compress { p = append(p, "Sec-WebSocket-Extensions: permessage-deflate; server_no_context_takeover; client_no_context_takeover\r\n"...) } for k, vs := range responseHeader { if k == "Sec-Websocket-Protocol" { continue } for _, v := range vs { p = append(p, k...) p = append(p, ": "...) for i := 0; i < len(v); i++ { b := v[i] if b <= 31 { // prevent response splitting. b = ' ' } p = append(p, b) } p = append(p, "\r\n"...) } } p = append(p, "\r\n"...) // Clear deadlines set by HTTP server. netConn.SetDeadline(time.Time{}) if u.HandshakeTimeout > 0 { netConn.SetWriteDeadline(time.Now().Add(u.HandshakeTimeout)) } if _, err = netConn.Write(p); err != nil { netConn.Close() return nil, err } if u.HandshakeTimeout > 0 { netConn.SetWriteDeadline(time.Time{}) } return c, nil } // Upgrade upgrades the HTTP server connection to the WebSocket protocol. // // Deprecated: Use websocket.Upgrader instead. // // Upgrade does not perform origin checking. The application is responsible for // checking the Origin header before calling Upgrade. An example implementation // of the same origin policy check is: // // if req.Header.Get("Origin") != "http://"+req.Host { // http.Error(w, "Origin not allowed", http.StatusForbidden) // return // } // // If the endpoint supports subprotocols, then the application is responsible // for negotiating the protocol used on the connection. Use the Subprotocols() // function to get the subprotocols requested by the client. Use the // Sec-Websocket-Protocol response header to specify the subprotocol selected // by the application. // // The responseHeader is included in the response to the client's upgrade // request. Use the responseHeader to specify cookies (Set-Cookie) and the // negotiated subprotocol (Sec-Websocket-Protocol). // // The connection buffers IO to the underlying network connection. The // readBufSize and writeBufSize parameters specify the size of the buffers to // use. Messages can be larger than the buffers. // // If the request is not a valid WebSocket handshake, then Upgrade returns an // error of type HandshakeError. Applications should handle this error by // replying to the client with an HTTP error response. func Upgrade(w http.ResponseWriter, r *http.Request, responseHeader http.Header, readBufSize, writeBufSize int) (*Conn, error) { u := Upgrader{ReadBufferSize: readBufSize, WriteBufferSize: writeBufSize} u.Error = func(w http.ResponseWriter, r *http.Request, status int, reason error) { // don't return errors to maintain backwards compatibility } u.CheckOrigin = func(r *http.Request) bool { // allow all connections by default return true } return u.Upgrade(w, r, responseHeader) } // Subprotocols returns the subprotocols requested by the client in the // Sec-Websocket-Protocol header. func Subprotocols(r *http.Request) []string { h := strings.TrimSpace(r.Header.Get("Sec-Websocket-Protocol")) if h == "" { return nil } protocols := strings.Split(h, ",") for i := range protocols { protocols[i] = strings.TrimSpace(protocols[i]) } return protocols } // IsWebSocketUpgrade returns true if the client requested upgrade to the // WebSocket protocol. func IsWebSocketUpgrade(r *http.Request) bool { return tokenListContainsValue(r.Header, "Connection", "upgrade") && tokenListContainsValue(r.Header, "Upgrade", "websocket") } // bufioReaderSize size returns the size of a bufio.Reader. func bufioReaderSize(originalReader io.Reader, br *bufio.Reader) int { // This code assumes that peek on a reset reader returns // bufio.Reader.buf[:0]. // TODO: Use bufio.Reader.Size() after Go 1.10 br.Reset(originalReader) if p, err := br.Peek(0); err == nil { return cap(p) } return 0 } // writeHook is an io.Writer that records the last slice passed to it vio // io.Writer.Write. type writeHook struct { p []byte } func (wh *writeHook) Write(p []byte) (int, error) { wh.p = p return len(p), nil } // bufioWriterBuffer grabs the buffer from a bufio.Writer. func bufioWriterBuffer(originalWriter io.Writer, bw *bufio.Writer) []byte { // This code assumes that bufio.Writer.buf[:1] is passed to the // bufio.Writer's underlying writer. var wh writeHook bw.Reset(&wh) bw.WriteByte(0) bw.Flush() bw.Reset(originalWriter) return wh.p[:cap(wh.p)] } websocket-1.4.1/server_test.go000066400000000000000000000063411353036111300163770ustar00rootroot00000000000000// Copyright 2013 The Gorilla WebSocket 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 websocket import ( "bufio" "bytes" "net" "net/http" "reflect" "strings" "testing" ) var subprotocolTests = []struct { h string protocols []string }{ {"", nil}, {"foo", []string{"foo"}}, {"foo,bar", []string{"foo", "bar"}}, {"foo, bar", []string{"foo", "bar"}}, {" foo, bar", []string{"foo", "bar"}}, {" foo, bar ", []string{"foo", "bar"}}, } func TestSubprotocols(t *testing.T) { for _, st := range subprotocolTests { r := http.Request{Header: http.Header{"Sec-Websocket-Protocol": {st.h}}} protocols := Subprotocols(&r) if !reflect.DeepEqual(st.protocols, protocols) { t.Errorf("SubProtocols(%q) returned %#v, want %#v", st.h, protocols, st.protocols) } } } var isWebSocketUpgradeTests = []struct { ok bool h http.Header }{ {false, http.Header{"Upgrade": {"websocket"}}}, {false, http.Header{"Connection": {"upgrade"}}}, {true, http.Header{"Connection": {"upgRade"}, "Upgrade": {"WebSocket"}}}, } func TestIsWebSocketUpgrade(t *testing.T) { for _, tt := range isWebSocketUpgradeTests { ok := IsWebSocketUpgrade(&http.Request{Header: tt.h}) if tt.ok != ok { t.Errorf("IsWebSocketUpgrade(%v) returned %v, want %v", tt.h, ok, tt.ok) } } } var checkSameOriginTests = []struct { ok bool r *http.Request }{ {false, &http.Request{Host: "example.org", Header: map[string][]string{"Origin": {"https://other.org"}}}}, {true, &http.Request{Host: "example.org", Header: map[string][]string{"Origin": {"https://example.org"}}}}, {true, &http.Request{Host: "Example.org", Header: map[string][]string{"Origin": {"https://example.org"}}}}, } func TestCheckSameOrigin(t *testing.T) { for _, tt := range checkSameOriginTests { ok := checkSameOrigin(tt.r) if tt.ok != ok { t.Errorf("checkSameOrigin(%+v) returned %v, want %v", tt.r, ok, tt.ok) } } } type reuseTestResponseWriter struct { brw *bufio.ReadWriter http.ResponseWriter } func (resp *reuseTestResponseWriter) Hijack() (net.Conn, *bufio.ReadWriter, error) { return fakeNetConn{strings.NewReader(""), &bytes.Buffer{}}, resp.brw, nil } var bufioReuseTests = []struct { n int reuse bool }{ {4096, true}, {128, false}, } func TestBufioReuse(t *testing.T) { for i, tt := range bufioReuseTests { br := bufio.NewReaderSize(strings.NewReader(""), tt.n) bw := bufio.NewWriterSize(&bytes.Buffer{}, tt.n) resp := &reuseTestResponseWriter{ brw: bufio.NewReadWriter(br, bw), } upgrader := Upgrader{} c, err := upgrader.Upgrade(resp, &http.Request{ Method: "GET", Header: http.Header{ "Upgrade": []string{"websocket"}, "Connection": []string{"upgrade"}, "Sec-Websocket-Key": []string{"dGhlIHNhbXBsZSBub25jZQ=="}, "Sec-Websocket-Version": []string{"13"}, }}, nil) if err != nil { t.Fatal(err) } if reuse := c.br == br; reuse != tt.reuse { t.Errorf("%d: buffered reader reuse=%v, want %v", i, reuse, tt.reuse) } writeBuf := bufioWriterBuffer(c.UnderlyingConn(), bw) if reuse := &c.writeBuf[0] == &writeBuf[0]; reuse != tt.reuse { t.Errorf("%d: write buffer reuse=%v, want %v", i, reuse, tt.reuse) } } } websocket-1.4.1/trace.go000066400000000000000000000006141353036111300151250ustar00rootroot00000000000000// +build go1.8 package websocket import ( "crypto/tls" "net/http/httptrace" ) func doHandshakeWithTrace(trace *httptrace.ClientTrace, tlsConn *tls.Conn, cfg *tls.Config) error { if trace.TLSHandshakeStart != nil { trace.TLSHandshakeStart() } err := doHandshake(tlsConn, cfg) if trace.TLSHandshakeDone != nil { trace.TLSHandshakeDone(tlsConn.ConnectionState(), err) } return err } websocket-1.4.1/trace_17.go000066400000000000000000000003351353036111300154340ustar00rootroot00000000000000// +build !go1.8 package websocket import ( "crypto/tls" "net/http/httptrace" ) func doHandshakeWithTrace(trace *httptrace.ClientTrace, tlsConn *tls.Conn, cfg *tls.Config) error { return doHandshake(tlsConn, cfg) } websocket-1.4.1/util.go000066400000000000000000000125471353036111300150140ustar00rootroot00000000000000// Copyright 2013 The Gorilla WebSocket 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 websocket import ( "crypto/rand" "crypto/sha1" "encoding/base64" "io" "net/http" "strings" "unicode/utf8" ) var keyGUID = []byte("258EAFA5-E914-47DA-95CA-C5AB0DC85B11") func computeAcceptKey(challengeKey string) string { h := sha1.New() h.Write([]byte(challengeKey)) h.Write(keyGUID) return base64.StdEncoding.EncodeToString(h.Sum(nil)) } func generateChallengeKey() (string, error) { p := make([]byte, 16) if _, err := io.ReadFull(rand.Reader, p); err != nil { return "", err } return base64.StdEncoding.EncodeToString(p), nil } // Token octets per RFC 2616. var isTokenOctet = [256]bool{ '!': true, '#': true, '$': true, '%': true, '&': true, '\'': true, '*': true, '+': true, '-': true, '.': true, '0': true, '1': true, '2': true, '3': true, '4': true, '5': true, '6': true, '7': true, '8': true, '9': true, 'A': true, 'B': true, 'C': true, 'D': true, 'E': true, 'F': true, 'G': true, 'H': true, 'I': true, 'J': true, 'K': true, 'L': true, 'M': true, 'N': true, 'O': true, 'P': true, 'Q': true, 'R': true, 'S': true, 'T': true, 'U': true, 'W': true, 'V': true, 'X': true, 'Y': true, 'Z': true, '^': true, '_': true, '`': true, 'a': true, 'b': true, 'c': true, 'd': true, 'e': true, 'f': true, 'g': true, 'h': true, 'i': true, 'j': true, 'k': true, 'l': true, 'm': true, 'n': true, 'o': true, 'p': true, 'q': true, 'r': true, 's': true, 't': true, 'u': true, 'v': true, 'w': true, 'x': true, 'y': true, 'z': true, '|': true, '~': true, } // skipSpace returns a slice of the string s with all leading RFC 2616 linear // whitespace removed. func skipSpace(s string) (rest string) { i := 0 for ; i < len(s); i++ { if b := s[i]; b != ' ' && b != '\t' { break } } return s[i:] } // nextToken returns the leading RFC 2616 token of s and the string following // the token. func nextToken(s string) (token, rest string) { i := 0 for ; i < len(s); i++ { if !isTokenOctet[s[i]] { break } } return s[:i], s[i:] } // nextTokenOrQuoted returns the leading token or quoted string per RFC 2616 // and the string following the token or quoted string. func nextTokenOrQuoted(s string) (value string, rest string) { if !strings.HasPrefix(s, "\"") { return nextToken(s) } s = s[1:] for i := 0; i < len(s); i++ { switch s[i] { case '"': return s[:i], s[i+1:] case '\\': p := make([]byte, len(s)-1) j := copy(p, s[:i]) escape := true for i = i + 1; i < len(s); i++ { b := s[i] switch { case escape: escape = false p[j] = b j++ case b == '\\': escape = true case b == '"': return string(p[:j]), s[i+1:] default: p[j] = b j++ } } return "", "" } } return "", "" } // equalASCIIFold returns true if s is equal to t with ASCII case folding as // defined in RFC 4790. func equalASCIIFold(s, t string) bool { for s != "" && t != "" { sr, size := utf8.DecodeRuneInString(s) s = s[size:] tr, size := utf8.DecodeRuneInString(t) t = t[size:] if sr == tr { continue } if 'A' <= sr && sr <= 'Z' { sr = sr + 'a' - 'A' } if 'A' <= tr && tr <= 'Z' { tr = tr + 'a' - 'A' } if sr != tr { return false } } return s == t } // tokenListContainsValue returns true if the 1#token header with the given // name contains a token equal to value with ASCII case folding. func tokenListContainsValue(header http.Header, name string, value string) bool { headers: for _, s := range header[name] { for { var t string t, s = nextToken(skipSpace(s)) if t == "" { continue headers } s = skipSpace(s) if s != "" && s[0] != ',' { continue headers } if equalASCIIFold(t, value) { return true } if s == "" { continue headers } s = s[1:] } } return false } // parseExtensions parses WebSocket extensions from a header. func parseExtensions(header http.Header) []map[string]string { // From RFC 6455: // // Sec-WebSocket-Extensions = extension-list // extension-list = 1#extension // extension = extension-token *( ";" extension-param ) // extension-token = registered-token // registered-token = token // extension-param = token [ "=" (token | quoted-string) ] // ;When using the quoted-string syntax variant, the value // ;after quoted-string unescaping MUST conform to the // ;'token' ABNF. var result []map[string]string headers: for _, s := range header["Sec-Websocket-Extensions"] { for { var t string t, s = nextToken(skipSpace(s)) if t == "" { continue headers } ext := map[string]string{"": t} for { s = skipSpace(s) if !strings.HasPrefix(s, ";") { break } var k string k, s = nextToken(skipSpace(s[1:])) if k == "" { continue headers } s = skipSpace(s) var v string if strings.HasPrefix(s, "=") { v, s = nextTokenOrQuoted(skipSpace(s[1:])) s = skipSpace(s) } if s != "" && s[0] != ',' && s[0] != ';' { continue headers } ext[k] = v } if s != "" && s[0] != ',' { continue headers } result = append(result, ext) if s == "" { continue headers } s = s[1:] } } return result } websocket-1.4.1/util_test.go000066400000000000000000000056461353036111300160550ustar00rootroot00000000000000// Copyright 2014 The Gorilla WebSocket 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 websocket import ( "net/http" "reflect" "testing" ) var equalASCIIFoldTests = []struct { t, s string eq bool }{ {"WebSocket", "websocket", true}, {"websocket", "WebSocket", true}, {"Öyster", "öyster", false}, {"WebSocket", "WetSocket", false}, } func TestEqualASCIIFold(t *testing.T) { for _, tt := range equalASCIIFoldTests { eq := equalASCIIFold(tt.s, tt.t) if eq != tt.eq { t.Errorf("equalASCIIFold(%q, %q) = %v, want %v", tt.s, tt.t, eq, tt.eq) } } } var tokenListContainsValueTests = []struct { value string ok bool }{ {"WebSocket", true}, {"WEBSOCKET", true}, {"websocket", true}, {"websockets", false}, {"x websocket", false}, {"websocket x", false}, {"other,websocket,more", true}, {"other, websocket, more", true}, } func TestTokenListContainsValue(t *testing.T) { for _, tt := range tokenListContainsValueTests { h := http.Header{"Upgrade": {tt.value}} ok := tokenListContainsValue(h, "Upgrade", "websocket") if ok != tt.ok { t.Errorf("tokenListContainsValue(h, n, %q) = %v, want %v", tt.value, ok, tt.ok) } } } var parseExtensionTests = []struct { value string extensions []map[string]string }{ {`foo`, []map[string]string{{"": "foo"}}}, {`foo, bar; baz=2`, []map[string]string{ {"": "foo"}, {"": "bar", "baz": "2"}}}, {`foo; bar="b,a;z"`, []map[string]string{ {"": "foo", "bar": "b,a;z"}}}, {`foo , bar; baz = 2`, []map[string]string{ {"": "foo"}, {"": "bar", "baz": "2"}}}, {`foo, bar; baz=2 junk`, []map[string]string{ {"": "foo"}}}, {`foo junk, bar; baz=2 junk`, nil}, {`mux; max-channels=4; flow-control, deflate-stream`, []map[string]string{ {"": "mux", "max-channels": "4", "flow-control": ""}, {"": "deflate-stream"}}}, {`permessage-foo; x="10"`, []map[string]string{ {"": "permessage-foo", "x": "10"}}}, {`permessage-foo; use_y, permessage-foo`, []map[string]string{ {"": "permessage-foo", "use_y": ""}, {"": "permessage-foo"}}}, {`permessage-deflate; client_max_window_bits; server_max_window_bits=10 , permessage-deflate; client_max_window_bits`, []map[string]string{ {"": "permessage-deflate", "client_max_window_bits": "", "server_max_window_bits": "10"}, {"": "permessage-deflate", "client_max_window_bits": ""}}}, {"permessage-deflate; server_no_context_takeover; client_max_window_bits=15", []map[string]string{ {"": "permessage-deflate", "server_no_context_takeover": "", "client_max_window_bits": "15"}, }}, } func TestParseExtensions(t *testing.T) { for _, tt := range parseExtensionTests { h := http.Header{http.CanonicalHeaderKey("Sec-WebSocket-Extensions"): {tt.value}} extensions := parseExtensions(h) if !reflect.DeepEqual(extensions, tt.extensions) { t.Errorf("parseExtensions(%q)\n = %v,\nwant %v", tt.value, extensions, tt.extensions) } } } websocket-1.4.1/x_net_proxy.go000066400000000000000000000311531353036111300164070ustar00rootroot00000000000000// Code generated by golang.org/x/tools/cmd/bundle. DO NOT EDIT. //go:generate bundle -o x_net_proxy.go golang.org/x/net/proxy // Package proxy provides support for a variety of protocols to proxy network // data. // package websocket import ( "errors" "io" "net" "net/url" "os" "strconv" "strings" "sync" ) type proxy_direct struct{} // Direct is a direct proxy: one that makes network connections directly. var proxy_Direct = proxy_direct{} func (proxy_direct) Dial(network, addr string) (net.Conn, error) { return net.Dial(network, addr) } // A PerHost directs connections to a default Dialer unless the host name // requested matches one of a number of exceptions. type proxy_PerHost struct { def, bypass proxy_Dialer bypassNetworks []*net.IPNet bypassIPs []net.IP bypassZones []string bypassHosts []string } // NewPerHost returns a PerHost Dialer that directs connections to either // defaultDialer or bypass, depending on whether the connection matches one of // the configured rules. func proxy_NewPerHost(defaultDialer, bypass proxy_Dialer) *proxy_PerHost { return &proxy_PerHost{ def: defaultDialer, bypass: bypass, } } // Dial connects to the address addr on the given network through either // defaultDialer or bypass. func (p *proxy_PerHost) Dial(network, addr string) (c net.Conn, err error) { host, _, err := net.SplitHostPort(addr) if err != nil { return nil, err } return p.dialerForRequest(host).Dial(network, addr) } func (p *proxy_PerHost) dialerForRequest(host string) proxy_Dialer { if ip := net.ParseIP(host); ip != nil { for _, net := range p.bypassNetworks { if net.Contains(ip) { return p.bypass } } for _, bypassIP := range p.bypassIPs { if bypassIP.Equal(ip) { return p.bypass } } return p.def } for _, zone := range p.bypassZones { if strings.HasSuffix(host, zone) { return p.bypass } if host == zone[1:] { // For a zone ".example.com", we match "example.com" // too. return p.bypass } } for _, bypassHost := range p.bypassHosts { if bypassHost == host { return p.bypass } } return p.def } // AddFromString parses a string that contains comma-separated values // specifying hosts that should use the bypass proxy. Each value is either an // IP address, a CIDR range, a zone (*.example.com) or a host name // (localhost). A best effort is made to parse the string and errors are // ignored. func (p *proxy_PerHost) AddFromString(s string) { hosts := strings.Split(s, ",") for _, host := range hosts { host = strings.TrimSpace(host) if len(host) == 0 { continue } if strings.Contains(host, "/") { // We assume that it's a CIDR address like 127.0.0.0/8 if _, net, err := net.ParseCIDR(host); err == nil { p.AddNetwork(net) } continue } if ip := net.ParseIP(host); ip != nil { p.AddIP(ip) continue } if strings.HasPrefix(host, "*.") { p.AddZone(host[1:]) continue } p.AddHost(host) } } // AddIP specifies an IP address that will use the bypass proxy. Note that // this will only take effect if a literal IP address is dialed. A connection // to a named host will never match an IP. func (p *proxy_PerHost) AddIP(ip net.IP) { p.bypassIPs = append(p.bypassIPs, ip) } // AddNetwork specifies an IP range that will use the bypass proxy. Note that // this will only take effect if a literal IP address is dialed. A connection // to a named host will never match. func (p *proxy_PerHost) AddNetwork(net *net.IPNet) { p.bypassNetworks = append(p.bypassNetworks, net) } // AddZone specifies a DNS suffix that will use the bypass proxy. A zone of // "example.com" matches "example.com" and all of its subdomains. func (p *proxy_PerHost) AddZone(zone string) { if strings.HasSuffix(zone, ".") { zone = zone[:len(zone)-1] } if !strings.HasPrefix(zone, ".") { zone = "." + zone } p.bypassZones = append(p.bypassZones, zone) } // AddHost specifies a host name that will use the bypass proxy. func (p *proxy_PerHost) AddHost(host string) { if strings.HasSuffix(host, ".") { host = host[:len(host)-1] } p.bypassHosts = append(p.bypassHosts, host) } // A Dialer is a means to establish a connection. type proxy_Dialer interface { // Dial connects to the given address via the proxy. Dial(network, addr string) (c net.Conn, err error) } // Auth contains authentication parameters that specific Dialers may require. type proxy_Auth struct { User, Password string } // FromEnvironment returns the dialer specified by the proxy related variables in // the environment. func proxy_FromEnvironment() proxy_Dialer { allProxy := proxy_allProxyEnv.Get() if len(allProxy) == 0 { return proxy_Direct } proxyURL, err := url.Parse(allProxy) if err != nil { return proxy_Direct } proxy, err := proxy_FromURL(proxyURL, proxy_Direct) if err != nil { return proxy_Direct } noProxy := proxy_noProxyEnv.Get() if len(noProxy) == 0 { return proxy } perHost := proxy_NewPerHost(proxy, proxy_Direct) perHost.AddFromString(noProxy) return perHost } // proxySchemes is a map from URL schemes to a function that creates a Dialer // from a URL with such a scheme. var proxy_proxySchemes map[string]func(*url.URL, proxy_Dialer) (proxy_Dialer, error) // RegisterDialerType takes a URL scheme and a function to generate Dialers from // a URL with that scheme and a forwarding Dialer. Registered schemes are used // by FromURL. func proxy_RegisterDialerType(scheme string, f func(*url.URL, proxy_Dialer) (proxy_Dialer, error)) { if proxy_proxySchemes == nil { proxy_proxySchemes = make(map[string]func(*url.URL, proxy_Dialer) (proxy_Dialer, error)) } proxy_proxySchemes[scheme] = f } // FromURL returns a Dialer given a URL specification and an underlying // Dialer for it to make network requests. func proxy_FromURL(u *url.URL, forward proxy_Dialer) (proxy_Dialer, error) { var auth *proxy_Auth if u.User != nil { auth = new(proxy_Auth) auth.User = u.User.Username() if p, ok := u.User.Password(); ok { auth.Password = p } } switch u.Scheme { case "socks5": return proxy_SOCKS5("tcp", u.Host, auth, forward) } // If the scheme doesn't match any of the built-in schemes, see if it // was registered by another package. if proxy_proxySchemes != nil { if f, ok := proxy_proxySchemes[u.Scheme]; ok { return f(u, forward) } } return nil, errors.New("proxy: unknown scheme: " + u.Scheme) } var ( proxy_allProxyEnv = &proxy_envOnce{ names: []string{"ALL_PROXY", "all_proxy"}, } proxy_noProxyEnv = &proxy_envOnce{ names: []string{"NO_PROXY", "no_proxy"}, } ) // envOnce looks up an environment variable (optionally by multiple // names) once. It mitigates expensive lookups on some platforms // (e.g. Windows). // (Borrowed from net/http/transport.go) type proxy_envOnce struct { names []string once sync.Once val string } func (e *proxy_envOnce) Get() string { e.once.Do(e.init) return e.val } func (e *proxy_envOnce) init() { for _, n := range e.names { e.val = os.Getenv(n) if e.val != "" { return } } } // SOCKS5 returns a Dialer that makes SOCKSv5 connections to the given address // with an optional username and password. See RFC 1928 and RFC 1929. func proxy_SOCKS5(network, addr string, auth *proxy_Auth, forward proxy_Dialer) (proxy_Dialer, error) { s := &proxy_socks5{ network: network, addr: addr, forward: forward, } if auth != nil { s.user = auth.User s.password = auth.Password } return s, nil } type proxy_socks5 struct { user, password string network, addr string forward proxy_Dialer } const proxy_socks5Version = 5 const ( proxy_socks5AuthNone = 0 proxy_socks5AuthPassword = 2 ) const proxy_socks5Connect = 1 const ( proxy_socks5IP4 = 1 proxy_socks5Domain = 3 proxy_socks5IP6 = 4 ) var proxy_socks5Errors = []string{ "", "general failure", "connection forbidden", "network unreachable", "host unreachable", "connection refused", "TTL expired", "command not supported", "address type not supported", } // Dial connects to the address addr on the given network via the SOCKS5 proxy. func (s *proxy_socks5) Dial(network, addr string) (net.Conn, error) { switch network { case "tcp", "tcp6", "tcp4": default: return nil, errors.New("proxy: no support for SOCKS5 proxy connections of type " + network) } conn, err := s.forward.Dial(s.network, s.addr) if err != nil { return nil, err } if err := s.connect(conn, addr); err != nil { conn.Close() return nil, err } return conn, nil } // connect takes an existing connection to a socks5 proxy server, // and commands the server to extend that connection to target, // which must be a canonical address with a host and port. func (s *proxy_socks5) connect(conn net.Conn, target string) error { host, portStr, err := net.SplitHostPort(target) if err != nil { return err } port, err := strconv.Atoi(portStr) if err != nil { return errors.New("proxy: failed to parse port number: " + portStr) } if port < 1 || port > 0xffff { return errors.New("proxy: port number out of range: " + portStr) } // the size here is just an estimate buf := make([]byte, 0, 6+len(host)) buf = append(buf, proxy_socks5Version) if len(s.user) > 0 && len(s.user) < 256 && len(s.password) < 256 { buf = append(buf, 2 /* num auth methods */, proxy_socks5AuthNone, proxy_socks5AuthPassword) } else { buf = append(buf, 1 /* num auth methods */, proxy_socks5AuthNone) } if _, err := conn.Write(buf); err != nil { return errors.New("proxy: failed to write greeting to SOCKS5 proxy at " + s.addr + ": " + err.Error()) } if _, err := io.ReadFull(conn, buf[:2]); err != nil { return errors.New("proxy: failed to read greeting from SOCKS5 proxy at " + s.addr + ": " + err.Error()) } if buf[0] != 5 { return errors.New("proxy: SOCKS5 proxy at " + s.addr + " has unexpected version " + strconv.Itoa(int(buf[0]))) } if buf[1] == 0xff { return errors.New("proxy: SOCKS5 proxy at " + s.addr + " requires authentication") } // See RFC 1929 if buf[1] == proxy_socks5AuthPassword { buf = buf[:0] buf = append(buf, 1 /* password protocol version */) buf = append(buf, uint8(len(s.user))) buf = append(buf, s.user...) buf = append(buf, uint8(len(s.password))) buf = append(buf, s.password...) if _, err := conn.Write(buf); err != nil { return errors.New("proxy: failed to write authentication request to SOCKS5 proxy at " + s.addr + ": " + err.Error()) } if _, err := io.ReadFull(conn, buf[:2]); err != nil { return errors.New("proxy: failed to read authentication reply from SOCKS5 proxy at " + s.addr + ": " + err.Error()) } if buf[1] != 0 { return errors.New("proxy: SOCKS5 proxy at " + s.addr + " rejected username/password") } } buf = buf[:0] buf = append(buf, proxy_socks5Version, proxy_socks5Connect, 0 /* reserved */) if ip := net.ParseIP(host); ip != nil { if ip4 := ip.To4(); ip4 != nil { buf = append(buf, proxy_socks5IP4) ip = ip4 } else { buf = append(buf, proxy_socks5IP6) } buf = append(buf, ip...) } else { if len(host) > 255 { return errors.New("proxy: destination host name too long: " + host) } buf = append(buf, proxy_socks5Domain) buf = append(buf, byte(len(host))) buf = append(buf, host...) } buf = append(buf, byte(port>>8), byte(port)) if _, err := conn.Write(buf); err != nil { return errors.New("proxy: failed to write connect request to SOCKS5 proxy at " + s.addr + ": " + err.Error()) } if _, err := io.ReadFull(conn, buf[:4]); err != nil { return errors.New("proxy: failed to read connect reply from SOCKS5 proxy at " + s.addr + ": " + err.Error()) } failure := "unknown error" if int(buf[1]) < len(proxy_socks5Errors) { failure = proxy_socks5Errors[buf[1]] } if len(failure) > 0 { return errors.New("proxy: SOCKS5 proxy at " + s.addr + " failed to connect: " + failure) } bytesToDiscard := 0 switch buf[3] { case proxy_socks5IP4: bytesToDiscard = net.IPv4len case proxy_socks5IP6: bytesToDiscard = net.IPv6len case proxy_socks5Domain: _, err := io.ReadFull(conn, buf[:1]) if err != nil { return errors.New("proxy: failed to read domain length from SOCKS5 proxy at " + s.addr + ": " + err.Error()) } bytesToDiscard = int(buf[0]) default: return errors.New("proxy: got unknown address type " + strconv.Itoa(int(buf[3])) + " from SOCKS5 proxy at " + s.addr) } if cap(buf) < bytesToDiscard { buf = make([]byte, bytesToDiscard) } else { buf = buf[:bytesToDiscard] } if _, err := io.ReadFull(conn, buf); err != nil { return errors.New("proxy: failed to read address from SOCKS5 proxy at " + s.addr + ": " + err.Error()) } // Also need to discard the port number if _, err := io.ReadFull(conn, buf[:2]); err != nil { return errors.New("proxy: failed to read port from SOCKS5 proxy at " + s.addr + ": " + err.Error()) } return nil }