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Upgrading server dependancies (#4566)

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Этот коммит содержится в:
Christopher Speller
2016-11-16 19:28:52 -05:00
коммит произвёл GitHub
родитель 0b296dd8c2
Коммит 0135904f7d
445 изменённых файлов: 38624 добавлений и 14161 удалений
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3
vendor/github.com/gorilla/websocket/.gitignore сгенерированный поставляемый
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@@ -20,3 +20,6 @@ _cgo_export.*
_testmain.go
*.exe
.idea/
*.iml

1
vendor/github.com/gorilla/websocket/.travis.yml сгенерированный поставляемый
Просмотреть файл

@@ -6,6 +6,7 @@ matrix:
- go: 1.4
- go: 1.5
- go: 1.6
- go: 1.7
- go: tip
allow_failures:
- go: tip

5
vendor/github.com/gorilla/websocket/README.md сгенерированный поставляемый
Просмотреть файл

@@ -3,6 +3,9 @@
Gorilla WebSocket is a [Go](http://golang.org/) implementation of the
[WebSocket](http://www.rfc-editor.org/rfc/rfc6455.txt) protocol.
[![Build Status](https://travis-ci.org/gorilla/websocket.svg?branch=master)](https://travis-ci.org/gorilla/websocket)
[![GoDoc](https://godoc.org/github.com/gorilla/websocket?status.svg)](https://godoc.org/github.com/gorilla/websocket)
### Documentation
* [API Reference](http://godoc.org/github.com/gorilla/websocket)
@@ -43,7 +46,7 @@ subdirectory](https://github.com/gorilla/websocket/tree/master/examples/autobahn
<tr><td>Send <a href="https://tools.ietf.org/html/rfc6455#section-5.5.2">pings</a> and receive <a href="https://tools.ietf.org/html/rfc6455#section-5.5.3">pongs</a></td><td><a href="http://godoc.org/github.com/gorilla/websocket#hdr-Control_Messages">Yes</a></td><td>No</td></tr>
<tr><td>Get the <a href="https://tools.ietf.org/html/rfc6455#section-5.6">type</a> of a received data message</td><td>Yes</td><td>Yes, see note 2</td></tr>
<tr><td colspan="3">Other Features</tr></td>
<tr><td>Limit size of received message</td><td><a href="http://godoc.org/github.com/gorilla/websocket#Conn.SetReadLimit">Yes</a></td><td><a href="https://code.google.com/p/go/issues/detail?id=5082">No</a></td></tr>
<tr><td><a href="https://tools.ietf.org/html/rfc7692">Compression Extensions</a></td><td>Experimental</td><td>No</td></tr>
<tr><td>Read message using io.Reader</td><td><a href="http://godoc.org/github.com/gorilla/websocket#Conn.NextReader">Yes</a></td><td>No, see note 3</td></tr>
<tr><td>Write message using io.WriteCloser</td><td><a href="http://godoc.org/github.com/gorilla/websocket#Conn.NextWriter">Yes</a></td><td>No, see note 3</td></tr>
</table>

19
vendor/github.com/gorilla/websocket/bench_test.go сгенерированный поставляемый
Просмотреть файл

@@ -1,19 +0,0 @@
// 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 (
"testing"
)
func BenchmarkMaskBytes(b *testing.B) {
var key [4]byte
data := make([]byte, 1024)
pos := 0
for i := 0; i < b.N; i++ {
pos = maskBytes(key, pos, data)
}
b.SetBytes(int64(len(data)))
}

47
vendor/github.com/gorilla/websocket/client.go сгенерированный поставляемый
Просмотреть файл

@@ -23,6 +23,8 @@ import (
// 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
@@ -70,6 +72,17 @@ type Dialer struct {
// 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
}
var errMalformedURL = errors.New("malformed ws or wss URL")
@@ -83,7 +96,6 @@ func parseURL(s string) (*url.URL, error) {
//
// ws-URI = "ws:" "//" host [ ":" port ] path [ "?" query ]
// wss-URI = "wss:" "//" host [ ":" port ] path [ "?" query ]
var u url.URL
switch {
case strings.HasPrefix(s, "ws://"):
@@ -193,6 +205,13 @@ func (d *Dialer) Dial(urlStr string, requestHeader http.Header) (*Conn, *http.Re
Host: u.Host,
}
// 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
@@ -214,6 +233,7 @@ func (d *Dialer) Dial(urlStr string, requestHeader http.Header) (*Conn, *http.Re
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)
default:
@@ -221,6 +241,10 @@ func (d *Dialer) Dial(urlStr string, requestHeader http.Header) (*Conn, *http.Re
}
}
if d.EnableCompression {
req.Header.Set("Sec-Websocket-Extensions", "permessage-deflate; server_no_context_takeover; client_no_context_takeover")
}
hostPort, hostNoPort := hostPortNoPort(u)
var proxyURL *url.URL
@@ -324,6 +348,13 @@ func (d *Dialer) Dial(urlStr string, requestHeader http.Header) (*Conn, *http.Re
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") ||
@@ -337,6 +368,20 @@ func (d *Dialer) Dial(urlStr string, requestHeader http.Header) (*Conn, *http.Re
return nil, resp, ErrBadHandshake
}
for _, ext := range parseExtensions(req.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")

77
vendor/github.com/gorilla/websocket/client_server_test.go сгенерированный поставляемый
Просмотреть файл

@@ -10,8 +10,8 @@ import (
"encoding/base64"
"io"
"io/ioutil"
"net"
"net/http"
"net/http/cookiejar"
"net/http/httptest"
"net/url"
"reflect"
@@ -21,9 +21,10 @@ import (
)
var cstUpgrader = Upgrader{
Subprotocols: []string{"p0", "p1"},
ReadBufferSize: 1024,
WriteBufferSize: 1024,
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)
},
@@ -228,6 +229,54 @@ func TestDial(t *testing.T) {
sendRecv(t, ws)
}
func TestDialCookieJar(t *testing.T) {
s := newServer(t)
defer s.Close()
jar, _ := cookiejar.New(nil)
d := cstDialer
d.Jar = jar
u, _ := parseURL(s.URL)
switch u.Scheme {
case "ws":
u.Scheme = "http"
case "wss":
u.Scheme = "https"
}
cookies := []*http.Cookie{&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 TestDialTLS(t *testing.T) {
s := newTLSServer(t)
defer s.Close()
@@ -243,11 +292,9 @@ func TestDialTLS(t *testing.T) {
}
}
u, _ := url.Parse(s.URL)
d := cstDialer
d.NetDial = func(network, addr string) (net.Conn, error) { return net.Dial(network, u.Host) }
d.TLSClientConfig = &tls.Config{RootCAs: certs}
ws, _, err := d.Dial("wss://example.com"+cstRequestURI, nil)
ws, _, err := d.Dial(s.URL, nil)
if err != nil {
t.Fatalf("Dial: %v", err)
}
@@ -267,7 +314,7 @@ func xTestDialTLSBadCert(t *testing.T) {
}
}
func xTestDialTLSNoVerify(t *testing.T) {
func TestDialTLSNoVerify(t *testing.T) {
s := newTLSServer(t)
defer s.Close()
@@ -449,3 +496,17 @@ func TestHostHeader(t *testing.T) {
sendRecv(t, ws)
}
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)
}

85
vendor/github.com/gorilla/websocket/compression.go сгенерированный поставляемый Обычный файл
Просмотреть файл

@@ -0,0 +1,85 @@
// 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.
package websocket
import (
"compress/flate"
"errors"
"io"
"strings"
)
func decompressNoContextTakeover(r io.Reader) io.Reader {
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"
return flate.NewReader(io.MultiReader(r, strings.NewReader(tail)))
}
func compressNoContextTakeover(w io.WriteCloser) (io.WriteCloser, error) {
tw := &truncWriter{w: w}
fw, err := flate.NewWriter(tw, 3)
return &flateWrapper{fw: fw, tw: tw}, err
}
// 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 flateWrapper struct {
fw *flate.Writer
tw *truncWriter
}
func (w *flateWrapper) Write(p []byte) (int, error) {
return w.fw.Write(p)
}
func (w *flateWrapper) Close() error {
err1 := w.fw.Flush()
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
}

31
vendor/github.com/gorilla/websocket/compression_test.go сгенерированный поставляемый Обычный файл
Просмотреть файл

@@ -0,0 +1,31 @@
package websocket
import (
"bytes"
"io"
"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())
}
}
}

489
vendor/github.com/gorilla/websocket/conn.go сгенерированный поставляемый
Просмотреть файл

@@ -10,19 +10,27 @@ import (
"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
finalBit = 1 << 7
maskBit = 1 << 7
writeWait = time.Second
writeWait = time.Second
defaultReadBufferSize = 4096
defaultWriteBufferSize = 4096
@@ -210,51 +218,41 @@ func isValidReceivedCloseCode(code int) bool {
return validReceivedCloseCodes[code] || (code >= 3000 && code <= 4999)
}
func maskBytes(key [4]byte, pos int, b []byte) int {
for i := range b {
b[i] ^= key[pos&3]
pos++
}
return pos & 3
}
func newMaskKey() [4]byte {
n := rand.Uint32()
return [4]byte{byte(n), byte(n >> 8), byte(n >> 16), byte(n >> 24)}
}
// Conn 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 and closeSent
closeSent bool // true if close message was sent
mu chan bool // used as mutex to protect write to conn
writeBuf []byte // frame is constructed in this buffer.
writeDeadline time.Time
writer io.WriteCloser // the current writer returned to the application
isWriting bool // for best-effort concurrent write detection
// Message writer fields.
writeErr error
writeBuf []byte // frame is constructed in this buffer.
writePos int // end of data in writeBuf.
writeFrameType int // type of the current frame.
writeSeq int // incremented to invalidate message writers.
writeDeadline time.Time
isWriting bool // for best-effort concurrent write detection
writeErrMu sync.Mutex
writeErr error
enableWriteCompression bool
newCompressionWriter func(io.WriteCloser) (io.WriteCloser, error)
// Read fields
readErr error
br *bufio.Reader
readRemaining int64 // bytes remaining in current frame.
readFinal bool // true the current message has more frames.
readSeq int // incremented to invalidate message readers.
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.Reader
}
func newConn(conn net.Conn, isServer bool, readBufferSize, writeBufferSize int) *Conn {
@@ -264,20 +262,23 @@ func newConn(conn net.Conn, isServer bool, readBufferSize, writeBufferSize int)
if readBufferSize == 0 {
readBufferSize = defaultReadBufferSize
}
if readBufferSize < maxControlFramePayloadSize {
readBufferSize = maxControlFramePayloadSize
}
if writeBufferSize == 0 {
writeBufferSize = defaultWriteBufferSize
}
c := &Conn{
isServer: isServer,
br: bufio.NewReaderSize(conn, readBufferSize),
conn: conn,
mu: mu,
readFinal: true,
writeBuf: make([]byte, writeBufferSize+maxFrameHeaderSize),
writeFrameType: noFrame,
writePos: maxFrameHeaderSize,
isServer: isServer,
br: bufio.NewReaderSize(conn, readBufferSize),
conn: conn,
mu: mu,
readFinal: true,
writeBuf: make([]byte, writeBufferSize+maxFrameHeaderSize),
enableWriteCompression: true,
}
c.SetCloseHandler(nil)
c.SetPingHandler(nil)
c.SetPongHandler(nil)
return c
@@ -305,29 +306,40 @@ func (c *Conn) RemoteAddr() net.Addr {
// 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) write(frameType int, deadline time.Time, bufs ...[]byte) error {
<-c.mu
defer func() { c.mu <- true }()
if c.closeSent {
return ErrCloseSent
} else if frameType == CloseMessage {
c.closeSent = true
c.writeErrMu.Lock()
err := c.writeErr
c.writeErrMu.Unlock()
if err != nil {
return err
}
c.conn.SetWriteDeadline(deadline)
for _, buf := range bufs {
if len(buf) > 0 {
n, err := c.conn.Write(buf)
if n != len(buf) {
// Close on partial write.
c.conn.Close()
}
_, err := c.conn.Write(buf)
if err != nil {
return err
return c.writeFatal(err)
}
}
}
if frameType == CloseMessage {
c.writeFatal(ErrCloseSent)
}
return nil
}
@@ -376,60 +388,104 @@ func (c *Conn) WriteControl(messageType int, data []byte, deadline time.Time) er
}
defer func() { c.mu <- true }()
if c.closeSent {
return ErrCloseSent
} else if messageType == CloseMessage {
c.closeSent = true
c.writeErrMu.Lock()
err := c.writeErr
c.writeErrMu.Unlock()
if err != nil {
return err
}
c.conn.SetWriteDeadline(deadline)
n, err := c.conn.Write(buf)
if n != 0 && n != len(buf) {
c.conn.Close()
_, err = c.conn.Write(buf)
if err != nil {
return c.writeFatal(err)
}
return hideTempErr(err)
if messageType == CloseMessage {
c.writeFatal(ErrCloseSent)
}
return err
}
// NextWriter returns a writer for the next message to send. The writer's
// Close method flushes the complete message to the network.
// 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.
func (c *Conn) NextWriter(messageType int) (io.WriteCloser, error) {
if c.writeErr != nil {
return nil, c.writeErr
}
if c.writeFrameType != noFrame {
if err := c.flushFrame(true, nil); err != nil {
return nil, err
}
// 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 nil, errBadWriteOpCode
}
c.writeFrameType = messageType
return messageWriter{c, c.writeSeq}, nil
}
func (c *Conn) flushFrame(final bool, extra []byte) error {
length := c.writePos - maxFrameHeaderSize + len(extra)
// Check for invalid control frames.
if isControl(c.writeFrameType) &&
(!final || length > maxControlFramePayloadSize) {
c.writeSeq++
c.writeFrameType = noFrame
c.writePos = maxFrameHeaderSize
return errInvalidControlFrame
c.writeErrMu.Lock()
err := c.writeErr
c.writeErrMu.Unlock()
if err != nil {
return nil, err
}
b0 := byte(c.writeFrameType)
mw := &messageWriter{
c: c,
frameType: messageType,
pos: maxFrameHeaderSize,
}
c.writer = mw
if c.newCompressionWriter != nil && c.enableWriteCompression && isData(messageType) {
w, err := c.newCompressionWriter(c.writer)
if err != nil {
c.writer = nil
return nil, err
}
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) fatal(err error) error {
if w.err != nil {
w.err = err
w.c.writer = 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.fatal(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
@@ -461,10 +517,9 @@ func (c *Conn) flushFrame(final bool, extra []byte) error {
if !c.isServer {
key := newMaskKey()
copy(c.writeBuf[maxFrameHeaderSize-4:], key[:])
maskBytes(key, 0, c.writeBuf[maxFrameHeaderSize:c.writePos])
maskBytes(key, 0, c.writeBuf[maxFrameHeaderSize:w.pos])
if len(extra) > 0 {
c.writeErr = errors.New("websocket: internal error, extra used in client mode")
return c.writeErr
return c.writeFatal(errors.New("websocket: internal error, extra used in client mode"))
}
}
@@ -477,46 +532,35 @@ func (c *Conn) flushFrame(final bool, extra []byte) error {
}
c.isWriting = true
c.writeErr = c.write(c.writeFrameType, c.writeDeadline, c.writeBuf[framePos:c.writePos], extra)
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
// Setup for next frame.
c.writePos = maxFrameHeaderSize
c.writeFrameType = continuationFrame
if err != nil {
return w.fatal(err)
}
if final {
c.writeSeq++
c.writeFrameType = noFrame
c.writer = nil
return nil
}
return c.writeErr
}
type messageWriter struct {
c *Conn
seq int
}
func (w messageWriter) err() error {
c := w.c
if c.writeSeq != w.seq {
return errWriteClosed
}
if c.writeErr != nil {
return c.writeErr
}
// 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.c.writePos
func (w *messageWriter) ncopy(max int) (int, error) {
n := len(w.c.writeBuf) - w.pos
if n <= 0 {
if err := w.c.flushFrame(false, nil); err != nil {
if err := w.flushFrame(false, nil); err != nil {
return 0, err
}
n = len(w.c.writeBuf) - w.c.writePos
n = len(w.c.writeBuf) - w.pos
}
if n > max {
n = max
@@ -524,14 +568,14 @@ func (w messageWriter) ncopy(max int) (int, error) {
return n, nil
}
func (w messageWriter) write(final bool, p []byte) (int, error) {
if err := w.err(); err != nil {
return 0, err
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.c.flushFrame(final, p)
err := w.flushFrame(false, p)
if err != nil {
return 0, err
}
@@ -544,20 +588,16 @@ func (w messageWriter) write(final bool, p []byte) (int, error) {
if err != nil {
return 0, err
}
copy(w.c.writeBuf[w.c.writePos:], p[:n])
w.c.writePos += n
copy(w.c.writeBuf[w.pos:], p[:n])
w.pos += n
p = p[n:]
}
return nn, nil
}
func (w messageWriter) Write(p []byte) (int, error) {
return w.write(false, p)
}
func (w messageWriter) WriteString(p string) (int, error) {
if err := w.err(); err != nil {
return 0, err
func (w *messageWriter) WriteString(p string) (int, error) {
if w.err != nil {
return 0, w.err
}
nn := len(p)
@@ -566,27 +606,27 @@ func (w messageWriter) WriteString(p string) (int, error) {
if err != nil {
return 0, err
}
copy(w.c.writeBuf[w.c.writePos:], p[:n])
w.c.writePos += n
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 err := w.err(); err != nil {
return 0, err
func (w *messageWriter) ReadFrom(r io.Reader) (nn int64, err error) {
if w.err != nil {
return 0, w.err
}
for {
if w.c.writePos == len(w.c.writeBuf) {
err = w.c.flushFrame(false, nil)
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.c.writePos:])
w.c.writePos += n
n, err = r.Read(w.c.writeBuf[w.pos:])
w.pos += n
nn += int64(n)
if err != nil {
if err == io.EOF {
@@ -598,30 +638,36 @@ func (w messageWriter) ReadFrom(r io.Reader) (nn int64, err error) {
return nn, err
}
func (w messageWriter) Close() error {
if err := w.err(); err != nil {
func (w *messageWriter) Close() error {
if w.err != nil {
return w.err
}
if err := w.flushFrame(true, nil); err != nil {
return err
}
return w.c.flushFrame(true, nil)
w.err = errWriteClosed
return nil
}
// 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 {
wr, err := c.NextWriter(messageType)
w, err := c.NextWriter(messageType)
if err != nil {
return err
}
w := wr.(messageWriter)
if _, err := w.write(true, data); err != nil {
if mw, ok := w.(*messageWriter); ok && c.isServer {
// Optimize write as a single frame.
n := copy(c.writeBuf[mw.pos:], data)
mw.pos += n
data = data[n:]
err = mw.flushFrame(true, data)
return err
}
if c.writeSeq == w.seq {
if err := c.flushFrame(true, nil); err != nil {
return err
}
if _, err = w.Write(data); err != nil {
return err
}
return nil
return w.Close()
}
// SetWriteDeadline sets the write deadline on the underlying network
@@ -635,22 +681,6 @@ func (c *Conn) SetWriteDeadline(t time.Time) error {
// Read methods
// readFull is like io.ReadFull except that io.EOF is never returned.
func (c *Conn) readFull(p []byte) (err error) {
var n int
for n < len(p) && err == nil {
var nn int
nn, err = c.br.Read(p[n:])
n += nn
}
if n == len(p) {
err = nil
} else if err == io.EOF {
err = errUnexpectedEOF
}
return
}
func (c *Conn) advanceFrame() (int, error) {
// 1. Skip remainder of previous frame.
@@ -663,19 +693,24 @@ func (c *Conn) advanceFrame() (int, error) {
// 2. Read and parse first two bytes of frame header.
var b [8]byte
if err := c.readFull(b[:2]); err != nil {
p, err := c.read(2)
if err != nil {
return noFrame, err
}
final := b[0]&finalBit != 0
frameType := int(b[0] & 0xf)
reserved := int((b[0] >> 4) & 0x7)
mask := b[1]&maskBit != 0
c.readRemaining = int64(b[1] & 0x7f)
final := p[0]&finalBit != 0
frameType := int(p[0] & 0xf)
mask := p[1]&maskBit != 0
c.readRemaining = int64(p[1] & 0x7f)
if reserved != 0 {
return noFrame, c.handleProtocolError("unexpected reserved bits " + strconv.Itoa(reserved))
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 {
@@ -704,15 +739,17 @@ func (c *Conn) advanceFrame() (int, error) {
switch c.readRemaining {
case 126:
if err := c.readFull(b[:2]); err != nil {
p, err := c.read(2)
if err != nil {
return noFrame, err
}
c.readRemaining = int64(binary.BigEndian.Uint16(b[:2]))
c.readRemaining = int64(binary.BigEndian.Uint16(p))
case 127:
if err := c.readFull(b[:8]); err != nil {
p, err := c.read(8)
if err != nil {
return noFrame, err
}
c.readRemaining = int64(binary.BigEndian.Uint64(b[:8]))
c.readRemaining = int64(binary.BigEndian.Uint64(p))
}
// 4. Handle frame masking.
@@ -723,9 +760,11 @@ func (c *Conn) advanceFrame() (int, error) {
if mask {
c.readMaskPos = 0
if err := c.readFull(c.readMaskKey[:]); err != nil {
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.
@@ -745,9 +784,9 @@ func (c *Conn) advanceFrame() (int, error) {
var payload []byte
if c.readRemaining > 0 {
payload = make([]byte, c.readRemaining)
payload, err = c.read(int(c.readRemaining))
c.readRemaining = 0
if err := c.readFull(payload); err != nil {
if err != nil {
return noFrame, err
}
if c.isServer {
@@ -767,11 +806,9 @@ func (c *Conn) advanceFrame() (int, error) {
return noFrame, err
}
case CloseMessage:
echoMessage := []byte{}
closeCode := CloseNoStatusReceived
closeText := ""
if len(payload) >= 2 {
echoMessage = payload[:2]
closeCode = int(binary.BigEndian.Uint16(payload))
if !isValidReceivedCloseCode(closeCode) {
return noFrame, c.handleProtocolError("invalid close code")
@@ -781,7 +818,9 @@ func (c *Conn) advanceFrame() (int, error) {
return noFrame, c.handleProtocolError("invalid utf8 payload in close frame")
}
}
c.WriteControl(CloseMessage, echoMessage, time.Now().Add(writeWait))
if err := c.handleClose(closeCode, closeText); err != nil {
return noFrame, err
}
return noFrame, &CloseError{Code: closeCode, Text: closeText}
}
@@ -805,7 +844,7 @@ func (c *Conn) handleProtocolError(message string) error {
// this method return the same error.
func (c *Conn) NextReader() (messageType int, r io.Reader, err error) {
c.readSeq++
c.messageReader = nil
c.readLength = 0
for c.readErr == nil {
@@ -815,7 +854,12 @@ func (c *Conn) NextReader() (messageType int, r io.Reader, err error) {
break
}
if frameType == TextMessage || frameType == BinaryMessage {
return frameType, messageReader{c, c.readSeq}, nil
c.messageReader = &messageReader{c}
var r io.Reader = c.messageReader
if c.readDecompress {
r = c.newDecompressionReader(r)
}
return frameType, r, nil
}
}
@@ -830,51 +874,48 @@ func (c *Conn) NextReader() (messageType int, r io.Reader, err error) {
return noFrame, nil, c.readErr
}
type messageReader struct {
c *Conn
seq int
}
type messageReader struct{ c *Conn }
func (r messageReader) Read(b []byte) (int, error) {
if r.seq != r.c.readSeq {
func (r *messageReader) Read(b []byte) (int, error) {
c := r.c
if c.messageReader != r {
return 0, io.EOF
}
for r.c.readErr == nil {
for c.readErr == nil {
if r.c.readRemaining > 0 {
if int64(len(b)) > r.c.readRemaining {
b = b[:r.c.readRemaining]
if c.readRemaining > 0 {
if int64(len(b)) > c.readRemaining {
b = b[:c.readRemaining]
}
n, err := r.c.br.Read(b)
r.c.readErr = hideTempErr(err)
if r.c.isServer {
r.c.readMaskPos = maskBytes(r.c.readMaskKey, r.c.readMaskPos, b[:n])
n, err := c.br.Read(b)
c.readErr = hideTempErr(err)
if c.isServer {
c.readMaskPos = maskBytes(c.readMaskKey, c.readMaskPos, b[:n])
}
r.c.readRemaining -= int64(n)
if r.c.readRemaining > 0 && r.c.readErr == io.EOF {
r.c.readErr = errUnexpectedEOF
c.readRemaining -= int64(n)
if c.readRemaining > 0 && c.readErr == io.EOF {
c.readErr = errUnexpectedEOF
}
return n, r.c.readErr
return n, c.readErr
}
if r.c.readFinal {
r.c.readSeq++
if c.readFinal {
c.messageReader = nil
return 0, io.EOF
}
frameType, err := r.c.advanceFrame()
frameType, err := c.advanceFrame()
switch {
case err != nil:
r.c.readErr = hideTempErr(err)
c.readErr = hideTempErr(err)
case frameType == TextMessage || frameType == BinaryMessage:
r.c.readErr = errors.New("websocket: internal error, unexpected text or binary in Reader")
c.readErr = errors.New("websocket: internal error, unexpected text or binary in Reader")
}
}
err := r.c.readErr
if err == io.EOF && r.seq == r.c.readSeq {
err := c.readErr
if err == io.EOF && c.messageReader == r {
err = errUnexpectedEOF
}
return 0, err
@@ -907,6 +948,34 @@ 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 frame
// 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 := []byte{}
if code != CloseNoStatusReceived {
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 frame application data. The default
// ping handler sends a pong to the peer.
@@ -925,6 +994,11 @@ func (c *Conn) SetPingHandler(h func(appData string) error) {
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 frame application data. The default
// pong handler does nothing.
@@ -941,6 +1015,13 @@ 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
}
// FormatCloseMessage formats closeCode and text as a WebSocket close message.
func FormatCloseMessage(closeCode int, text string) []byte {
buf := make([]byte, 2+len(text))

18
vendor/github.com/gorilla/websocket/conn_read.go сгенерированный поставляемый Обычный файл
Просмотреть файл

@@ -0,0 +1,18 @@
// 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 go1.5
package websocket
import "io"
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
}

21
vendor/github.com/gorilla/websocket/conn_read_legacy.go сгенерированный поставляемый Обычный файл
Просмотреть файл

@@ -0,0 +1,21 @@
// 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 !go1.5
package websocket
import "io"
func (c *Conn) read(n int) ([]byte, error) {
p, err := c.br.Peek(n)
if err == io.EOF {
err = errUnexpectedEOF
}
if len(p) > 0 {
// advance over the bytes just read
io.ReadFull(c.br, p)
}
return p, err
}

169
vendor/github.com/gorilla/websocket/conn_test.go сгенерированный поставляемый
Просмотреть файл

@@ -26,12 +26,27 @@ type fakeNetConn struct {
}
func (c fakeNetConn) Close() error { return nil }
func (c fakeNetConn) LocalAddr() net.Addr { return nil }
func (c fakeNetConn) RemoteAddr() net.Addr { 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"
}
func TestFraming(t *testing.T) {
frameSizes := []int{0, 1, 2, 124, 125, 126, 127, 128, 129, 65534, 65535, 65536, 65537}
var readChunkers = []struct {
@@ -42,66 +57,78 @@ func TestFraming(t *testing.T) {
{"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 _, isServer := range []bool{true, false} {
for _, chunker := range readChunkers {
for _, compress := range []bool{false, true} {
for _, isServer := range []bool{true, false} {
for _, chunker := range readChunkers {
var connBuf bytes.Buffer
wc := newConn(fakeNetConn{Reader: nil, Writer: &connBuf}, isServer, 1024, 1024)
rc := newConn(fakeNetConn{Reader: chunker.f(&connBuf), Writer: nil}, !isServer, 1024, 1024)
var connBuf bytes.Buffer
wc := newConn(fakeNetConn{Reader: nil, Writer: &connBuf}, isServer, 1024, 1024)
rc := newConn(fakeNetConn{Reader: chunker.f(&connBuf), Writer: nil}, !isServer, 1024, 1024)
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)
for _, n := range frameSizes {
for _, iocopy := range []bool{true, false} {
name := fmt.Sprintf("s:%v, r:%s, n:%d c:%v", isServer, chunker.name, n, iocopy)
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
}
w, err := wc.NextWriter(TextMessage)
if err != nil {
t.Errorf("%s: wc.NextWriter() returned %v", name, err)
continue
}
var nn int
if iocopy {
var n64 int64
n64, err = io.Copy(w, bytes.NewReader(writeBuf[:n]))
nn = int(n64)
} else {
nn, err = w.Write(writeBuf[: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
}
rbuf, err := ioutil.ReadAll(r)
if err != nil {
t.Errorf("%s: ReadFull() returned rbuf, %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
}
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
}
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
for i, b := range rbuf {
if byte(i) != b {
t.Errorf("%s: bad byte at offset %d", name, i)
break
}
}
}
}
@@ -146,7 +173,7 @@ func TestControl(t *testing.T) {
}
}
func TestCloseBeforeFinalFrame(t *testing.T) {
func TestCloseFrameBeforeFinalMessageFrame(t *testing.T) {
const bufSize = 512
expectedErr := &CloseError{Code: CloseNormalClosure, Text: "hello"}
@@ -233,6 +260,32 @@ func TestEOFBeforeFinalFrame(t *testing.T) {
}
}
func TestWriteAfterMessageWriterClose(t *testing.T) {
wc := newConn(fakeNetConn{Reader: nil, Writer: &bytes.Buffer{}}, false, 1024, 1024)
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) {
const readLimit = 512
@@ -267,6 +320,16 @@ func TestReadLimit(t *testing.T) {
}
}
func TestAddrs(t *testing.T) {
c := newConn(&fakeNetConn{}, true, 1024, 1024)
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}

21
vendor/github.com/gorilla/websocket/doc.go сгенерированный поставляемый
Просмотреть файл

@@ -149,4 +149,25 @@
// The deprecated Upgrade function does not enforce an origin policy. It's the
// application's responsibility to check the Origin header before calling
// Upgrade.
//
// 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. 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(true)
//
// 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

8
vendor/github.com/gorilla/websocket/examples/autobahn/server.go сгенерированный поставляемый
Просмотреть файл

@@ -8,17 +8,19 @@ package main
import (
"errors"
"flag"
"github.com/gorilla/websocket"
"io"
"log"
"net/http"
"time"
"unicode/utf8"
"github.com/gorilla/websocket"
)
var upgrader = websocket.Upgrader{
ReadBufferSize: 4096,
WriteBufferSize: 4096,
ReadBufferSize: 4096,
WriteBufferSize: 4096,
EnableCompression: true,
CheckOrigin: func(r *http.Request) bool {
return true
},

86
vendor/github.com/gorilla/websocket/examples/chat/README.md сгенерированный поставляемый
Просмотреть файл

@@ -1,8 +1,8 @@
# Chat Example
This application shows how to use use the
[websocket](https://github.com/gorilla/websocket) package and
[jQuery](http://jquery.com) to implement a simple web chat application.
[websocket](https://github.com/gorilla/websocket) package to implement a simple
web chat application.
## Running the example
@@ -18,3 +18,85 @@ using the following commands.
$ 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.

134
vendor/github.com/gorilla/websocket/examples/chat/client.go сгенерированный поставляемый Обычный файл
Просмотреть файл

@@ -0,0 +1,134 @@
// 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) {
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, []byte{}); 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
go client.writePump()
client.readPump()
}

105
vendor/github.com/gorilla/websocket/examples/chat/conn.go сгенерированный поставляемый
Просмотреть файл

@@ -1,105 +0,0 @@
// 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 (
"github.com/gorilla/websocket"
"log"
"net/http"
"time"
)
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 upgrader = websocket.Upgrader{
ReadBufferSize: 1024,
WriteBufferSize: 1024,
}
// connection is an middleman between the websocket connection and the hub.
type connection struct {
// The websocket connection.
ws *websocket.Conn
// Buffered channel of outbound messages.
send chan []byte
}
// readPump pumps messages from the websocket connection to the hub.
func (c *connection) readPump() {
defer func() {
h.unregister <- c
c.ws.Close()
}()
c.ws.SetReadLimit(maxMessageSize)
c.ws.SetReadDeadline(time.Now().Add(pongWait))
c.ws.SetPongHandler(func(string) error { c.ws.SetReadDeadline(time.Now().Add(pongWait)); return nil })
for {
_, message, err := c.ws.ReadMessage()
if err != nil {
if websocket.IsUnexpectedCloseError(err, websocket.CloseGoingAway) {
log.Printf("error: %v", err)
}
break
}
h.broadcast <- message
}
}
// write writes a message with the given message type and payload.
func (c *connection) write(mt int, payload []byte) error {
c.ws.SetWriteDeadline(time.Now().Add(writeWait))
return c.ws.WriteMessage(mt, payload)
}
// writePump pumps messages from the hub to the websocket connection.
func (c *connection) writePump() {
ticker := time.NewTicker(pingPeriod)
defer func() {
ticker.Stop()
c.ws.Close()
}()
for {
select {
case message, ok := <-c.send:
if !ok {
c.write(websocket.CloseMessage, []byte{})
return
}
if err := c.write(websocket.TextMessage, message); err != nil {
return
}
case <-ticker.C:
if err := c.write(websocket.PingMessage, []byte{}); err != nil {
return
}
}
}
}
// serveWs handles websocket requests from the peer.
func serveWs(w http.ResponseWriter, r *http.Request) {
ws, err := upgrader.Upgrade(w, r, nil)
if err != nil {
log.Println(err)
return
}
c := &connection{send: make(chan []byte, 256), ws: ws}
h.register <- c
go c.writePump()
c.readPump()
}

54
vendor/github.com/gorilla/websocket/examples/chat/home.html сгенерированный поставляемый
Просмотреть файл

@@ -2,47 +2,53 @@
<html lang="en">
<head>
<title>Chat Example</title>
<script src="//ajax.googleapis.com/ajax/libs/jquery/2.0.3/jquery.min.js"></script>
<script type="text/javascript">
$(function() {
window.onload = function () {
var conn;
var msg = $("#msg");
var log = $("#log");
var msg = document.getElementById("msg");
var log = document.getElementById("log");
function appendLog(msg) {
var d = log[0]
var doScroll = d.scrollTop == d.scrollHeight - d.clientHeight;
msg.appendTo(log)
function appendLog(item) {
var doScroll = log.scrollTop === log.scrollHeight - log.clientHeight;
log.appendChild(item);
if (doScroll) {
d.scrollTop = d.scrollHeight - d.clientHeight;
log.scrollTop = log.scrollHeight - log.clientHeight;
}
}
$("#form").submit(function() {
document.getElementById("form").onsubmit = function () {
if (!conn) {
return false;
}
if (!msg.val()) {
if (!msg.value) {
return false;
}
conn.send(msg.val());
msg.val("");
return false
});
conn.send(msg.value);
msg.value = "";
return false;
};
if (window["WebSocket"]) {
conn = new WebSocket("ws://{{$}}/ws");
conn.onclose = function(evt) {
appendLog($("<div><b>Connection closed.</b></div>"))
}
conn.onmessage = function(evt) {
appendLog($("<div/>").text(evt.data))
}
conn.onclose = function (evt) {
var item = document.createElement("div");
item.innerHTML = "<b>Connection closed.</b>";
appendLog(item);
};
conn.onmessage = function (evt) {
var messages = evt.data.split('\n');
for (var i = 0; i < messages.length; i++) {
var item = document.createElement("div");
item.innerText = messages[i];
appendLog(item);
}
};
} else {
appendLog($("<div><b>Your browser does not support WebSockets.</b></div>"))
var item = document.createElement("div");
item.innerHTML = "<b>Your browser does not support WebSockets.</b>";
appendLog(item);
}
});
};
</script>
<style type="text/css">
html {

56
vendor/github.com/gorilla/websocket/examples/chat/hub.go сгенерированный поставляемый
Просмотреть файл

@@ -4,46 +4,48 @@
package main
// hub maintains the set of active connections and broadcasts messages to the
// connections.
type hub struct {
// Registered connections.
connections map[*connection]bool
// 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 connections.
// Inbound messages from the clients.
broadcast chan []byte
// Register requests from the connections.
register chan *connection
// Register requests from the clients.
register chan *Client
// Unregister requests from connections.
unregister chan *connection
// Unregister requests from clients.
unregister chan *Client
}
var h = hub{
broadcast: make(chan []byte),
register: make(chan *connection),
unregister: make(chan *connection),
connections: make(map[*connection]bool),
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() {
func (h *Hub) run() {
for {
select {
case c := <-h.register:
h.connections[c] = true
case c := <-h.unregister:
if _, ok := h.connections[c]; ok {
delete(h.connections, c)
close(c.send)
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 m := <-h.broadcast:
for c := range h.connections {
case message := <-h.broadcast:
for client := range h.clients {
select {
case c.send <- m:
case client.send <- message:
default:
close(c.send)
delete(h.connections, c)
close(client.send)
delete(h.clients, client)
}
}
}

12
vendor/github.com/gorilla/websocket/examples/chat/main.go сгенерированный поставляемый
Просмотреть файл

@@ -12,9 +12,10 @@ import (
)
var addr = flag.String("addr", ":8080", "http service address")
var homeTempl = template.Must(template.ParseFiles("home.html"))
var homeTemplate = template.Must(template.ParseFiles("home.html"))
func serveHome(w http.ResponseWriter, r *http.Request) {
log.Println(r.URL)
if r.URL.Path != "/" {
http.Error(w, "Not found", 404)
return
@@ -24,14 +25,17 @@ func serveHome(w http.ResponseWriter, r *http.Request) {
return
}
w.Header().Set("Content-Type", "text/html; charset=utf-8")
homeTempl.Execute(w, r.Host)
homeTemplate.Execute(w, r.Host)
}
func main() {
flag.Parse()
go h.run()
hub := newHub()
go hub.run()
http.HandleFunc("/", serveHome)
http.HandleFunc("/ws", serveWs)
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)

12
vendor/github.com/gorilla/websocket/examples/command/main.go сгенерированный поставляемый
Просмотреть файл

@@ -36,6 +36,9 @@ const (
// 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) {
@@ -57,19 +60,24 @@ func pumpStdin(ws *websocket.Conn, w io.Writer) {
func pumpStdout(ws *websocket.Conn, r io.Reader, done chan struct{}) {
defer func() {
ws.Close()
close(done)
}()
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{}) {

61
vendor/github.com/gorilla/websocket/mask.go сгенерированный поставляемый Обычный файл
Просмотреть файл

@@ -0,0 +1,61 @@
// 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.
package websocket
import (
"math/rand"
"unsafe"
)
const wordSize = int(unsafe.Sizeof(uintptr(0)))
func newMaskKey() [4]byte {
n := rand.Uint32()
return [4]byte{byte(n), byte(n >> 8), byte(n >> 16), byte(n >> 24)}
}
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
}

73
vendor/github.com/gorilla/websocket/mask_test.go сгенерированный поставляемый Обычный файл
Просмотреть файл

@@ -0,0 +1,73 @@
// 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.
// Require 1.7 for sub-bencmarks
// +build go1.7
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)))
})
}
})
}
})
}
}

34
vendor/github.com/gorilla/websocket/server.go сгенерированный поставляемый
Просмотреть файл

@@ -46,6 +46,12 @@ type Upgrader struct {
// CheckOrigin is nil, the host in the Origin header must not be set or
// must match the host of the request.
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) {
@@ -53,6 +59,7 @@ func (u *Upgrader) returnError(w http.ResponseWriter, r *http.Request, status in
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
@@ -99,7 +106,12 @@ func (u *Upgrader) Upgrade(w http.ResponseWriter, r *http.Request, responseHeade
if r.Method != "GET" {
return u.returnError(w, r, http.StatusMethodNotAllowed, "websocket: method not GET")
}
if values := r.Header["Sec-Websocket-Version"]; len(values) == 0 || values[0] != "13" {
if _, ok := responseHeader["Sec-Websocket-Extensions"]; ok {
return u.returnError(w, r, http.StatusInternalServerError, "websocket: application specific Sec-Websocket-Extensions headers are unsupported")
}
if !tokenListContainsValue(r.Header, "Sec-Websocket-Version", "13") {
return u.returnError(w, r, http.StatusBadRequest, "websocket: version != 13")
}
@@ -126,6 +138,18 @@ func (u *Upgrader) Upgrade(w http.ResponseWriter, r *http.Request, responseHeade
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
}
}
var (
netConn net.Conn
br *bufio.Reader
@@ -151,6 +175,11 @@ func (u *Upgrader) Upgrade(w http.ResponseWriter, r *http.Request, responseHeade
c := newConn(netConn, true, u.ReadBufferSize, u.WriteBufferSize)
c.subprotocol = subprotocol
if compress {
c.newCompressionWriter = compressNoContextTakeover
c.newDecompressionReader = decompressNoContextTakeover
}
p := c.writeBuf[: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)...)
@@ -160,6 +189,9 @@ func (u *Upgrader) Upgrade(w http.ResponseWriter, r *http.Request, responseHeade
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

196
vendor/github.com/gorilla/websocket/util.go сгенерированный поставляемый
Просмотреть файл

@@ -13,19 +13,6 @@ import (
"strings"
)
// tokenListContainsValue returns true if the 1#token header with the given
// name contains token.
func tokenListContainsValue(header http.Header, name string, value string) bool {
for _, v := range header[name] {
for _, s := range strings.Split(v, ",") {
if strings.EqualFold(value, strings.TrimSpace(s)) {
return true
}
}
}
return false
}
var keyGUID = []byte("258EAFA5-E914-47DA-95CA-C5AB0DC85B11")
func computeAcceptKey(challengeKey string) string {
@@ -42,3 +29,186 @@ func generateChallengeKey() (string, error) {
}
return base64.StdEncoding.EncodeToString(p), nil
}
// Octet types from RFC 2616.
var octetTypes [256]byte
const (
isTokenOctet = 1 << iota
isSpaceOctet
)
func init() {
// From RFC 2616
//
// OCTET = <any 8-bit sequence of data>
// CHAR = <any US-ASCII character (octets 0 - 127)>
// CTL = <any US-ASCII control character (octets 0 - 31) and DEL (127)>
// CR = <US-ASCII CR, carriage return (13)>
// LF = <US-ASCII LF, linefeed (10)>
// SP = <US-ASCII SP, space (32)>
// HT = <US-ASCII HT, horizontal-tab (9)>
// <"> = <US-ASCII double-quote mark (34)>
// CRLF = CR LF
// LWS = [CRLF] 1*( SP | HT )
// TEXT = <any OCTET except CTLs, but including LWS>
// separators = "(" | ")" | "<" | ">" | "@" | "," | ";" | ":" | "\" | <">
// | "/" | "[" | "]" | "?" | "=" | "{" | "}" | SP | HT
// token = 1*<any CHAR except CTLs or separators>
// qdtext = <any TEXT except <">>
for c := 0; c < 256; c++ {
var t byte
isCtl := c <= 31 || c == 127
isChar := 0 <= c && c <= 127
isSeparator := strings.IndexRune(" \t\"(),/:;<=>?@[]\\{}", rune(c)) >= 0
if strings.IndexRune(" \t\r\n", rune(c)) >= 0 {
t |= isSpaceOctet
}
if isChar && !isCtl && !isSeparator {
t |= isTokenOctet
}
octetTypes[c] = t
}
}
func skipSpace(s string) (rest string) {
i := 0
for ; i < len(s); i++ {
if octetTypes[s[i]]&isSpaceOctet == 0 {
break
}
}
return s[i:]
}
func nextToken(s string) (token, rest string) {
i := 0
for ; i < len(s); i++ {
if octetTypes[s[i]]&isTokenOctet == 0 {
break
}
}
return s[:i], s[i:]
}
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 += 1
case b == '\\':
escape = true
case b == '"':
return string(p[:j]), s[i+1:]
default:
p[j] = b
j += 1
}
}
return "", ""
}
}
return "", ""
}
// tokenListContainsValue returns true if the 1#token header with the given
// name contains token.
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 strings.EqualFold(t, value) {
return true
}
if s == "" {
continue headers
}
s = s[1:]
}
}
return false
}
// parseExtensiosn 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
}

40
vendor/github.com/gorilla/websocket/util_test.go сгенерированный поставляемый
Просмотреть файл

@@ -6,6 +6,7 @@ package websocket
import (
"net/http"
"reflect"
"testing"
)
@@ -32,3 +33,42 @@ func TestTokenListContainsValue(t *testing.T) {
}
}
}
var parseExtensionTests = []struct {
value string
extensions []map[string]string
}{
{`foo`, []map[string]string{map[string]string{"": "foo"}}},
{`foo, bar; baz=2`, []map[string]string{
map[string]string{"": "foo"},
map[string]string{"": "bar", "baz": "2"}}},
{`foo; bar="b,a;z"`, []map[string]string{
map[string]string{"": "foo", "bar": "b,a;z"}}},
{`foo , bar; baz = 2`, []map[string]string{
map[string]string{"": "foo"},
map[string]string{"": "bar", "baz": "2"}}},
{`foo, bar; baz=2 junk`, []map[string]string{
map[string]string{"": "foo"}}},
{`foo junk, bar; baz=2 junk`, nil},
{`mux; max-channels=4; flow-control, deflate-stream`, []map[string]string{
map[string]string{"": "mux", "max-channels": "4", "flow-control": ""},
map[string]string{"": "deflate-stream"}}},
{`permessage-foo; x="10"`, []map[string]string{
map[string]string{"": "permessage-foo", "x": "10"}}},
{`permessage-foo; use_y, permessage-foo`, []map[string]string{
map[string]string{"": "permessage-foo", "use_y": ""},
map[string]string{"": "permessage-foo"}}},
{`permessage-deflate; client_max_window_bits; server_max_window_bits=10 , permessage-deflate; client_max_window_bits`, []map[string]string{
map[string]string{"": "permessage-deflate", "client_max_window_bits": "", "server_max_window_bits": "10"},
map[string]string{"": "permessage-deflate", "client_max_window_bits": ""}}},
}
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)
}
}
}