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-rw-r--r--vendor/golang.org/x/net/websocket/client.go106
-rw-r--r--vendor/golang.org/x/net/websocket/dial.go24
-rw-r--r--vendor/golang.org/x/net/websocket/hybi.go583
-rw-r--r--vendor/golang.org/x/net/websocket/server.go113
-rw-r--r--vendor/golang.org/x/net/websocket/websocket.go442
5 files changed, 1268 insertions, 0 deletions
diff --git a/vendor/golang.org/x/net/websocket/client.go b/vendor/golang.org/x/net/websocket/client.go
new file mode 100644
index 000000000..69a4ac7ee
--- /dev/null
+++ b/vendor/golang.org/x/net/websocket/client.go
@@ -0,0 +1,106 @@
+// Copyright 2009 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package websocket
+
+import (
+ "bufio"
+ "io"
+ "net"
+ "net/http"
+ "net/url"
+)
+
+// DialError is an error that occurs while dialling a websocket server.
+type DialError struct {
+ *Config
+ Err error
+}
+
+func (e *DialError) Error() string {
+ return "websocket.Dial " + e.Config.Location.String() + ": " + e.Err.Error()
+}
+
+// NewConfig creates a new WebSocket config for client connection.
+func NewConfig(server, origin string) (config *Config, err error) {
+ config = new(Config)
+ config.Version = ProtocolVersionHybi13
+ config.Location, err = url.ParseRequestURI(server)
+ if err != nil {
+ return
+ }
+ config.Origin, err = url.ParseRequestURI(origin)
+ if err != nil {
+ return
+ }
+ config.Header = http.Header(make(map[string][]string))
+ return
+}
+
+// NewClient creates a new WebSocket client connection over rwc.
+func NewClient(config *Config, rwc io.ReadWriteCloser) (ws *Conn, err error) {
+ br := bufio.NewReader(rwc)
+ bw := bufio.NewWriter(rwc)
+ err = hybiClientHandshake(config, br, bw)
+ if err != nil {
+ return
+ }
+ buf := bufio.NewReadWriter(br, bw)
+ ws = newHybiClientConn(config, buf, rwc)
+ return
+}
+
+// Dial opens a new client connection to a WebSocket.
+func Dial(url_, protocol, origin string) (ws *Conn, err error) {
+ config, err := NewConfig(url_, origin)
+ if err != nil {
+ return nil, err
+ }
+ if protocol != "" {
+ config.Protocol = []string{protocol}
+ }
+ return DialConfig(config)
+}
+
+var portMap = map[string]string{
+ "ws": "80",
+ "wss": "443",
+}
+
+func parseAuthority(location *url.URL) string {
+ if _, ok := portMap[location.Scheme]; ok {
+ if _, _, err := net.SplitHostPort(location.Host); err != nil {
+ return net.JoinHostPort(location.Host, portMap[location.Scheme])
+ }
+ }
+ return location.Host
+}
+
+// DialConfig opens a new client connection to a WebSocket with a config.
+func DialConfig(config *Config) (ws *Conn, err error) {
+ var client net.Conn
+ if config.Location == nil {
+ return nil, &DialError{config, ErrBadWebSocketLocation}
+ }
+ if config.Origin == nil {
+ return nil, &DialError{config, ErrBadWebSocketOrigin}
+ }
+ dialer := config.Dialer
+ if dialer == nil {
+ dialer = &net.Dialer{}
+ }
+ client, err = dialWithDialer(dialer, config)
+ if err != nil {
+ goto Error
+ }
+ ws, err = NewClient(config, client)
+ if err != nil {
+ client.Close()
+ goto Error
+ }
+ return
+
+Error:
+ return nil, &DialError{config, err}
+}
diff --git a/vendor/golang.org/x/net/websocket/dial.go b/vendor/golang.org/x/net/websocket/dial.go
new file mode 100644
index 000000000..2dab943a4
--- /dev/null
+++ b/vendor/golang.org/x/net/websocket/dial.go
@@ -0,0 +1,24 @@
+// Copyright 2015 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package websocket
+
+import (
+ "crypto/tls"
+ "net"
+)
+
+func dialWithDialer(dialer *net.Dialer, config *Config) (conn net.Conn, err error) {
+ switch config.Location.Scheme {
+ case "ws":
+ conn, err = dialer.Dial("tcp", parseAuthority(config.Location))
+
+ case "wss":
+ conn, err = tls.DialWithDialer(dialer, "tcp", parseAuthority(config.Location), config.TlsConfig)
+
+ default:
+ err = ErrBadScheme
+ }
+ return
+}
diff --git a/vendor/golang.org/x/net/websocket/hybi.go b/vendor/golang.org/x/net/websocket/hybi.go
new file mode 100644
index 000000000..8cffdd16c
--- /dev/null
+++ b/vendor/golang.org/x/net/websocket/hybi.go
@@ -0,0 +1,583 @@
+// Copyright 2011 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package websocket
+
+// This file implements a protocol of hybi draft.
+// http://tools.ietf.org/html/draft-ietf-hybi-thewebsocketprotocol-17
+
+import (
+ "bufio"
+ "bytes"
+ "crypto/rand"
+ "crypto/sha1"
+ "encoding/base64"
+ "encoding/binary"
+ "fmt"
+ "io"
+ "io/ioutil"
+ "net/http"
+ "net/url"
+ "strings"
+)
+
+const (
+ websocketGUID = "258EAFA5-E914-47DA-95CA-C5AB0DC85B11"
+
+ closeStatusNormal = 1000
+ closeStatusGoingAway = 1001
+ closeStatusProtocolError = 1002
+ closeStatusUnsupportedData = 1003
+ closeStatusFrameTooLarge = 1004
+ closeStatusNoStatusRcvd = 1005
+ closeStatusAbnormalClosure = 1006
+ closeStatusBadMessageData = 1007
+ closeStatusPolicyViolation = 1008
+ closeStatusTooBigData = 1009
+ closeStatusExtensionMismatch = 1010
+
+ maxControlFramePayloadLength = 125
+)
+
+var (
+ ErrBadMaskingKey = &ProtocolError{"bad masking key"}
+ ErrBadPongMessage = &ProtocolError{"bad pong message"}
+ ErrBadClosingStatus = &ProtocolError{"bad closing status"}
+ ErrUnsupportedExtensions = &ProtocolError{"unsupported extensions"}
+ ErrNotImplemented = &ProtocolError{"not implemented"}
+
+ handshakeHeader = map[string]bool{
+ "Host": true,
+ "Upgrade": true,
+ "Connection": true,
+ "Sec-Websocket-Key": true,
+ "Sec-Websocket-Origin": true,
+ "Sec-Websocket-Version": true,
+ "Sec-Websocket-Protocol": true,
+ "Sec-Websocket-Accept": true,
+ }
+)
+
+// A hybiFrameHeader is a frame header as defined in hybi draft.
+type hybiFrameHeader struct {
+ Fin bool
+ Rsv [3]bool
+ OpCode byte
+ Length int64
+ MaskingKey []byte
+
+ data *bytes.Buffer
+}
+
+// A hybiFrameReader is a reader for hybi frame.
+type hybiFrameReader struct {
+ reader io.Reader
+
+ header hybiFrameHeader
+ pos int64
+ length int
+}
+
+func (frame *hybiFrameReader) Read(msg []byte) (n int, err error) {
+ n, err = frame.reader.Read(msg)
+ if frame.header.MaskingKey != nil {
+ for i := 0; i < n; i++ {
+ msg[i] = msg[i] ^ frame.header.MaskingKey[frame.pos%4]
+ frame.pos++
+ }
+ }
+ return n, err
+}
+
+func (frame *hybiFrameReader) PayloadType() byte { return frame.header.OpCode }
+
+func (frame *hybiFrameReader) HeaderReader() io.Reader {
+ if frame.header.data == nil {
+ return nil
+ }
+ if frame.header.data.Len() == 0 {
+ return nil
+ }
+ return frame.header.data
+}
+
+func (frame *hybiFrameReader) TrailerReader() io.Reader { return nil }
+
+func (frame *hybiFrameReader) Len() (n int) { return frame.length }
+
+// A hybiFrameReaderFactory creates new frame reader based on its frame type.
+type hybiFrameReaderFactory struct {
+ *bufio.Reader
+}
+
+// NewFrameReader reads a frame header from the connection, and creates new reader for the frame.
+// See Section 5.2 Base Framing protocol for detail.
+// http://tools.ietf.org/html/draft-ietf-hybi-thewebsocketprotocol-17#section-5.2
+func (buf hybiFrameReaderFactory) NewFrameReader() (frame frameReader, err error) {
+ hybiFrame := new(hybiFrameReader)
+ frame = hybiFrame
+ var header []byte
+ var b byte
+ // First byte. FIN/RSV1/RSV2/RSV3/OpCode(4bits)
+ b, err = buf.ReadByte()
+ if err != nil {
+ return
+ }
+ header = append(header, b)
+ hybiFrame.header.Fin = ((header[0] >> 7) & 1) != 0
+ for i := 0; i < 3; i++ {
+ j := uint(6 - i)
+ hybiFrame.header.Rsv[i] = ((header[0] >> j) & 1) != 0
+ }
+ hybiFrame.header.OpCode = header[0] & 0x0f
+
+ // Second byte. Mask/Payload len(7bits)
+ b, err = buf.ReadByte()
+ if err != nil {
+ return
+ }
+ header = append(header, b)
+ mask := (b & 0x80) != 0
+ b &= 0x7f
+ lengthFields := 0
+ switch {
+ case b <= 125: // Payload length 7bits.
+ hybiFrame.header.Length = int64(b)
+ case b == 126: // Payload length 7+16bits
+ lengthFields = 2
+ case b == 127: // Payload length 7+64bits
+ lengthFields = 8
+ }
+ for i := 0; i < lengthFields; i++ {
+ b, err = buf.ReadByte()
+ if err != nil {
+ return
+ }
+ if lengthFields == 8 && i == 0 { // MSB must be zero when 7+64 bits
+ b &= 0x7f
+ }
+ header = append(header, b)
+ hybiFrame.header.Length = hybiFrame.header.Length*256 + int64(b)
+ }
+ if mask {
+ // Masking key. 4 bytes.
+ for i := 0; i < 4; i++ {
+ b, err = buf.ReadByte()
+ if err != nil {
+ return
+ }
+ header = append(header, b)
+ hybiFrame.header.MaskingKey = append(hybiFrame.header.MaskingKey, b)
+ }
+ }
+ hybiFrame.reader = io.LimitReader(buf.Reader, hybiFrame.header.Length)
+ hybiFrame.header.data = bytes.NewBuffer(header)
+ hybiFrame.length = len(header) + int(hybiFrame.header.Length)
+ return
+}
+
+// A HybiFrameWriter is a writer for hybi frame.
+type hybiFrameWriter struct {
+ writer *bufio.Writer
+
+ header *hybiFrameHeader
+}
+
+func (frame *hybiFrameWriter) Write(msg []byte) (n int, err error) {
+ var header []byte
+ var b byte
+ if frame.header.Fin {
+ b |= 0x80
+ }
+ for i := 0; i < 3; i++ {
+ if frame.header.Rsv[i] {
+ j := uint(6 - i)
+ b |= 1 << j
+ }
+ }
+ b |= frame.header.OpCode
+ header = append(header, b)
+ if frame.header.MaskingKey != nil {
+ b = 0x80
+ } else {
+ b = 0
+ }
+ lengthFields := 0
+ length := len(msg)
+ switch {
+ case length <= 125:
+ b |= byte(length)
+ case length < 65536:
+ b |= 126
+ lengthFields = 2
+ default:
+ b |= 127
+ lengthFields = 8
+ }
+ header = append(header, b)
+ for i := 0; i < lengthFields; i++ {
+ j := uint((lengthFields - i - 1) * 8)
+ b = byte((length >> j) & 0xff)
+ header = append(header, b)
+ }
+ if frame.header.MaskingKey != nil {
+ if len(frame.header.MaskingKey) != 4 {
+ return 0, ErrBadMaskingKey
+ }
+ header = append(header, frame.header.MaskingKey...)
+ frame.writer.Write(header)
+ data := make([]byte, length)
+ for i := range data {
+ data[i] = msg[i] ^ frame.header.MaskingKey[i%4]
+ }
+ frame.writer.Write(data)
+ err = frame.writer.Flush()
+ return length, err
+ }
+ frame.writer.Write(header)
+ frame.writer.Write(msg)
+ err = frame.writer.Flush()
+ return length, err
+}
+
+func (frame *hybiFrameWriter) Close() error { return nil }
+
+type hybiFrameWriterFactory struct {
+ *bufio.Writer
+ needMaskingKey bool
+}
+
+func (buf hybiFrameWriterFactory) NewFrameWriter(payloadType byte) (frame frameWriter, err error) {
+ frameHeader := &hybiFrameHeader{Fin: true, OpCode: payloadType}
+ if buf.needMaskingKey {
+ frameHeader.MaskingKey, err = generateMaskingKey()
+ if err != nil {
+ return nil, err
+ }
+ }
+ return &hybiFrameWriter{writer: buf.Writer, header: frameHeader}, nil
+}
+
+type hybiFrameHandler struct {
+ conn *Conn
+ payloadType byte
+}
+
+func (handler *hybiFrameHandler) HandleFrame(frame frameReader) (frameReader, error) {
+ if handler.conn.IsServerConn() {
+ // The client MUST mask all frames sent to the server.
+ if frame.(*hybiFrameReader).header.MaskingKey == nil {
+ handler.WriteClose(closeStatusProtocolError)
+ return nil, io.EOF
+ }
+ } else {
+ // The server MUST NOT mask all frames.
+ if frame.(*hybiFrameReader).header.MaskingKey != nil {
+ handler.WriteClose(closeStatusProtocolError)
+ return nil, io.EOF
+ }
+ }
+ if header := frame.HeaderReader(); header != nil {
+ io.Copy(ioutil.Discard, header)
+ }
+ switch frame.PayloadType() {
+ case ContinuationFrame:
+ frame.(*hybiFrameReader).header.OpCode = handler.payloadType
+ case TextFrame, BinaryFrame:
+ handler.payloadType = frame.PayloadType()
+ case CloseFrame:
+ return nil, io.EOF
+ case PingFrame, PongFrame:
+ b := make([]byte, maxControlFramePayloadLength)
+ n, err := io.ReadFull(frame, b)
+ if err != nil && err != io.EOF && err != io.ErrUnexpectedEOF {
+ return nil, err
+ }
+ io.Copy(ioutil.Discard, frame)
+ if frame.PayloadType() == PingFrame {
+ if _, err := handler.WritePong(b[:n]); err != nil {
+ return nil, err
+ }
+ }
+ return nil, nil
+ }
+ return frame, nil
+}
+
+func (handler *hybiFrameHandler) WriteClose(status int) (err error) {
+ handler.conn.wio.Lock()
+ defer handler.conn.wio.Unlock()
+ w, err := handler.conn.frameWriterFactory.NewFrameWriter(CloseFrame)
+ if err != nil {
+ return err
+ }
+ msg := make([]byte, 2)
+ binary.BigEndian.PutUint16(msg, uint16(status))
+ _, err = w.Write(msg)
+ w.Close()
+ return err
+}
+
+func (handler *hybiFrameHandler) WritePong(msg []byte) (n int, err error) {
+ handler.conn.wio.Lock()
+ defer handler.conn.wio.Unlock()
+ w, err := handler.conn.frameWriterFactory.NewFrameWriter(PongFrame)
+ if err != nil {
+ return 0, err
+ }
+ n, err = w.Write(msg)
+ w.Close()
+ return n, err
+}
+
+// newHybiConn creates a new WebSocket connection speaking hybi draft protocol.
+func newHybiConn(config *Config, buf *bufio.ReadWriter, rwc io.ReadWriteCloser, request *http.Request) *Conn {
+ if buf == nil {
+ br := bufio.NewReader(rwc)
+ bw := bufio.NewWriter(rwc)
+ buf = bufio.NewReadWriter(br, bw)
+ }
+ ws := &Conn{config: config, request: request, buf: buf, rwc: rwc,
+ frameReaderFactory: hybiFrameReaderFactory{buf.Reader},
+ frameWriterFactory: hybiFrameWriterFactory{
+ buf.Writer, request == nil},
+ PayloadType: TextFrame,
+ defaultCloseStatus: closeStatusNormal}
+ ws.frameHandler = &hybiFrameHandler{conn: ws}
+ return ws
+}
+
+// generateMaskingKey generates a masking key for a frame.
+func generateMaskingKey() (maskingKey []byte, err error) {
+ maskingKey = make([]byte, 4)
+ if _, err = io.ReadFull(rand.Reader, maskingKey); err != nil {
+ return
+ }
+ return
+}
+
+// generateNonce generates a nonce consisting of a randomly selected 16-byte
+// value that has been base64-encoded.
+func generateNonce() (nonce []byte) {
+ key := make([]byte, 16)
+ if _, err := io.ReadFull(rand.Reader, key); err != nil {
+ panic(err)
+ }
+ nonce = make([]byte, 24)
+ base64.StdEncoding.Encode(nonce, key)
+ return
+}
+
+// removeZone removes IPv6 zone identifer from host.
+// E.g., "[fe80::1%en0]:8080" to "[fe80::1]:8080"
+func removeZone(host string) string {
+ if !strings.HasPrefix(host, "[") {
+ return host
+ }
+ i := strings.LastIndex(host, "]")
+ if i < 0 {
+ return host
+ }
+ j := strings.LastIndex(host[:i], "%")
+ if j < 0 {
+ return host
+ }
+ return host[:j] + host[i:]
+}
+
+// getNonceAccept computes the base64-encoded SHA-1 of the concatenation of
+// the nonce ("Sec-WebSocket-Key" value) with the websocket GUID string.
+func getNonceAccept(nonce []byte) (expected []byte, err error) {
+ h := sha1.New()
+ if _, err = h.Write(nonce); err != nil {
+ return
+ }
+ if _, err = h.Write([]byte(websocketGUID)); err != nil {
+ return
+ }
+ expected = make([]byte, 28)
+ base64.StdEncoding.Encode(expected, h.Sum(nil))
+ return
+}
+
+// Client handshake described in draft-ietf-hybi-thewebsocket-protocol-17
+func hybiClientHandshake(config *Config, br *bufio.Reader, bw *bufio.Writer) (err error) {
+ bw.WriteString("GET " + config.Location.RequestURI() + " HTTP/1.1\r\n")
+
+ // According to RFC 6874, an HTTP client, proxy, or other
+ // intermediary must remove any IPv6 zone identifier attached
+ // to an outgoing URI.
+ bw.WriteString("Host: " + removeZone(config.Location.Host) + "\r\n")
+ bw.WriteString("Upgrade: websocket\r\n")
+ bw.WriteString("Connection: Upgrade\r\n")
+ nonce := generateNonce()
+ if config.handshakeData != nil {
+ nonce = []byte(config.handshakeData["key"])
+ }
+ bw.WriteString("Sec-WebSocket-Key: " + string(nonce) + "\r\n")
+ bw.WriteString("Origin: " + strings.ToLower(config.Origin.String()) + "\r\n")
+
+ if config.Version != ProtocolVersionHybi13 {
+ return ErrBadProtocolVersion
+ }
+
+ bw.WriteString("Sec-WebSocket-Version: " + fmt.Sprintf("%d", config.Version) + "\r\n")
+ if len(config.Protocol) > 0 {
+ bw.WriteString("Sec-WebSocket-Protocol: " + strings.Join(config.Protocol, ", ") + "\r\n")
+ }
+ // TODO(ukai): send Sec-WebSocket-Extensions.
+ err = config.Header.WriteSubset(bw, handshakeHeader)
+ if err != nil {
+ return err
+ }
+
+ bw.WriteString("\r\n")
+ if err = bw.Flush(); err != nil {
+ return err
+ }
+
+ resp, err := http.ReadResponse(br, &http.Request{Method: "GET"})
+ if err != nil {
+ return err
+ }
+ if resp.StatusCode != 101 {
+ return ErrBadStatus
+ }
+ if strings.ToLower(resp.Header.Get("Upgrade")) != "websocket" ||
+ strings.ToLower(resp.Header.Get("Connection")) != "upgrade" {
+ return ErrBadUpgrade
+ }
+ expectedAccept, err := getNonceAccept(nonce)
+ if err != nil {
+ return err
+ }
+ if resp.Header.Get("Sec-WebSocket-Accept") != string(expectedAccept) {
+ return ErrChallengeResponse
+ }
+ if resp.Header.Get("Sec-WebSocket-Extensions") != "" {
+ return ErrUnsupportedExtensions
+ }
+ offeredProtocol := resp.Header.Get("Sec-WebSocket-Protocol")
+ if offeredProtocol != "" {
+ protocolMatched := false
+ for i := 0; i < len(config.Protocol); i++ {
+ if config.Protocol[i] == offeredProtocol {
+ protocolMatched = true
+ break
+ }
+ }
+ if !protocolMatched {
+ return ErrBadWebSocketProtocol
+ }
+ config.Protocol = []string{offeredProtocol}
+ }
+
+ return nil
+}
+
+// newHybiClientConn creates a client WebSocket connection after handshake.
+func newHybiClientConn(config *Config, buf *bufio.ReadWriter, rwc io.ReadWriteCloser) *Conn {
+ return newHybiConn(config, buf, rwc, nil)
+}
+
+// A HybiServerHandshaker performs a server handshake using hybi draft protocol.
+type hybiServerHandshaker struct {
+ *Config
+ accept []byte
+}
+
+func (c *hybiServerHandshaker) ReadHandshake(buf *bufio.Reader, req *http.Request) (code int, err error) {
+ c.Version = ProtocolVersionHybi13
+ if req.Method != "GET" {
+ return http.StatusMethodNotAllowed, ErrBadRequestMethod
+ }
+ // HTTP version can be safely ignored.
+
+ if strings.ToLower(req.Header.Get("Upgrade")) != "websocket" ||
+ !strings.Contains(strings.ToLower(req.Header.Get("Connection")), "upgrade") {
+ return http.StatusBadRequest, ErrNotWebSocket
+ }
+
+ key := req.Header.Get("Sec-Websocket-Key")
+ if key == "" {
+ return http.StatusBadRequest, ErrChallengeResponse
+ }
+ version := req.Header.Get("Sec-Websocket-Version")
+ switch version {
+ case "13":
+ c.Version = ProtocolVersionHybi13
+ default:
+ return http.StatusBadRequest, ErrBadWebSocketVersion
+ }
+ var scheme string
+ if req.TLS != nil {
+ scheme = "wss"
+ } else {
+ scheme = "ws"
+ }
+ c.Location, err = url.ParseRequestURI(scheme + "://" + req.Host + req.URL.RequestURI())
+ if err != nil {
+ return http.StatusBadRequest, err
+ }
+ protocol := strings.TrimSpace(req.Header.Get("Sec-Websocket-Protocol"))
+ if protocol != "" {
+ protocols := strings.Split(protocol, ",")
+ for i := 0; i < len(protocols); i++ {
+ c.Protocol = append(c.Protocol, strings.TrimSpace(protocols[i]))
+ }
+ }
+ c.accept, err = getNonceAccept([]byte(key))
+ if err != nil {
+ return http.StatusInternalServerError, err
+ }
+ return http.StatusSwitchingProtocols, nil
+}
+
+// Origin parses the Origin header in req.
+// If the Origin header is not set, it returns nil and nil.
+func Origin(config *Config, req *http.Request) (*url.URL, error) {
+ var origin string
+ switch config.Version {
+ case ProtocolVersionHybi13:
+ origin = req.Header.Get("Origin")
+ }
+ if origin == "" {
+ return nil, nil
+ }
+ return url.ParseRequestURI(origin)
+}
+
+func (c *hybiServerHandshaker) AcceptHandshake(buf *bufio.Writer) (err error) {
+ if len(c.Protocol) > 0 {
+ if len(c.Protocol) != 1 {
+ // You need choose a Protocol in Handshake func in Server.
+ return ErrBadWebSocketProtocol
+ }
+ }
+ buf.WriteString("HTTP/1.1 101 Switching Protocols\r\n")
+ buf.WriteString("Upgrade: websocket\r\n")
+ buf.WriteString("Connection: Upgrade\r\n")
+ buf.WriteString("Sec-WebSocket-Accept: " + string(c.accept) + "\r\n")
+ if len(c.Protocol) > 0 {
+ buf.WriteString("Sec-WebSocket-Protocol: " + c.Protocol[0] + "\r\n")
+ }
+ // TODO(ukai): send Sec-WebSocket-Extensions.
+ if c.Header != nil {
+ err := c.Header.WriteSubset(buf, handshakeHeader)
+ if err != nil {
+ return err
+ }
+ }
+ buf.WriteString("\r\n")
+ return buf.Flush()
+}
+
+func (c *hybiServerHandshaker) NewServerConn(buf *bufio.ReadWriter, rwc io.ReadWriteCloser, request *http.Request) *Conn {
+ return newHybiServerConn(c.Config, buf, rwc, request)
+}
+
+// newHybiServerConn returns a new WebSocket connection speaking hybi draft protocol.
+func newHybiServerConn(config *Config, buf *bufio.ReadWriter, rwc io.ReadWriteCloser, request *http.Request) *Conn {
+ return newHybiConn(config, buf, rwc, request)
+}
diff --git a/vendor/golang.org/x/net/websocket/server.go b/vendor/golang.org/x/net/websocket/server.go
new file mode 100644
index 000000000..0895dea19
--- /dev/null
+++ b/vendor/golang.org/x/net/websocket/server.go
@@ -0,0 +1,113 @@
+// Copyright 2009 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package websocket
+
+import (
+ "bufio"
+ "fmt"
+ "io"
+ "net/http"
+)
+
+func newServerConn(rwc io.ReadWriteCloser, buf *bufio.ReadWriter, req *http.Request, config *Config, handshake func(*Config, *http.Request) error) (conn *Conn, err error) {
+ var hs serverHandshaker = &hybiServerHandshaker{Config: config}
+ code, err := hs.ReadHandshake(buf.Reader, req)
+ if err == ErrBadWebSocketVersion {
+ fmt.Fprintf(buf, "HTTP/1.1 %03d %s\r\n", code, http.StatusText(code))
+ fmt.Fprintf(buf, "Sec-WebSocket-Version: %s\r\n", SupportedProtocolVersion)
+ buf.WriteString("\r\n")
+ buf.WriteString(err.Error())
+ buf.Flush()
+ return
+ }
+ if err != nil {
+ fmt.Fprintf(buf, "HTTP/1.1 %03d %s\r\n", code, http.StatusText(code))
+ buf.WriteString("\r\n")
+ buf.WriteString(err.Error())
+ buf.Flush()
+ return
+ }
+ if handshake != nil {
+ err = handshake(config, req)
+ if err != nil {
+ code = http.StatusForbidden
+ fmt.Fprintf(buf, "HTTP/1.1 %03d %s\r\n", code, http.StatusText(code))
+ buf.WriteString("\r\n")
+ buf.Flush()
+ return
+ }
+ }
+ err = hs.AcceptHandshake(buf.Writer)
+ if err != nil {
+ code = http.StatusBadRequest
+ fmt.Fprintf(buf, "HTTP/1.1 %03d %s\r\n", code, http.StatusText(code))
+ buf.WriteString("\r\n")
+ buf.Flush()
+ return
+ }
+ conn = hs.NewServerConn(buf, rwc, req)
+ return
+}
+
+// Server represents a server of a WebSocket.
+type Server struct {
+ // Config is a WebSocket configuration for new WebSocket connection.
+ Config
+
+ // Handshake is an optional function in WebSocket handshake.
+ // For example, you can check, or don't check Origin header.
+ // Another example, you can select config.Protocol.
+ Handshake func(*Config, *http.Request) error
+
+ // Handler handles a WebSocket connection.
+ Handler
+}
+
+// ServeHTTP implements the http.Handler interface for a WebSocket
+func (s Server) ServeHTTP(w http.ResponseWriter, req *http.Request) {
+ s.serveWebSocket(w, req)
+}
+
+func (s Server) serveWebSocket(w http.ResponseWriter, req *http.Request) {
+ rwc, buf, err := w.(http.Hijacker).Hijack()
+ if err != nil {
+ panic("Hijack failed: " + err.Error())
+ }
+ // The server should abort the WebSocket connection if it finds
+ // the client did not send a handshake that matches with protocol
+ // specification.
+ defer rwc.Close()
+ conn, err := newServerConn(rwc, buf, req, &s.Config, s.Handshake)
+ if err != nil {
+ return
+ }
+ if conn == nil {
+ panic("unexpected nil conn")
+ }
+ s.Handler(conn)
+}
+
+// Handler is a simple interface to a WebSocket browser client.
+// It checks if Origin header is valid URL by default.
+// You might want to verify websocket.Conn.Config().Origin in the func.
+// If you use Server instead of Handler, you could call websocket.Origin and
+// check the origin in your Handshake func. So, if you want to accept
+// non-browser clients, which do not send an Origin header, set a
+// Server.Handshake that does not check the origin.
+type Handler func(*Conn)
+
+func checkOrigin(config *Config, req *http.Request) (err error) {
+ config.Origin, err = Origin(config, req)
+ if err == nil && config.Origin == nil {
+ return fmt.Errorf("null origin")
+ }
+ return err
+}
+
+// ServeHTTP implements the http.Handler interface for a WebSocket
+func (h Handler) ServeHTTP(w http.ResponseWriter, req *http.Request) {
+ s := Server{Handler: h, Handshake: checkOrigin}
+ s.serveWebSocket(w, req)
+}
diff --git a/vendor/golang.org/x/net/websocket/websocket.go b/vendor/golang.org/x/net/websocket/websocket.go
new file mode 100644
index 000000000..a7731d9c9
--- /dev/null
+++ b/vendor/golang.org/x/net/websocket/websocket.go
@@ -0,0 +1,442 @@
+// Copyright 2009 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// Package websocket implements a client and server for the WebSocket protocol
+// as specified in RFC 6455.
+package websocket // import "golang.org/x/net/websocket"
+
+import (
+ "bufio"
+ "crypto/tls"
+ "encoding/json"
+ "errors"
+ "io"
+ "io/ioutil"
+ "net"
+ "net/http"
+ "net/url"
+ "sync"
+ "time"
+)
+
+const (
+ ProtocolVersionHybi13 = 13
+ ProtocolVersionHybi = ProtocolVersionHybi13
+ SupportedProtocolVersion = "13"
+
+ ContinuationFrame = 0
+ TextFrame = 1
+ BinaryFrame = 2
+ CloseFrame = 8
+ PingFrame = 9
+ PongFrame = 10
+ UnknownFrame = 255
+
+ DefaultMaxPayloadBytes = 32 << 20 // 32MB
+)
+
+// ProtocolError represents WebSocket protocol errors.
+type ProtocolError struct {
+ ErrorString string
+}
+
+func (err *ProtocolError) Error() string { return err.ErrorString }
+
+var (
+ ErrBadProtocolVersion = &ProtocolError{"bad protocol version"}
+ ErrBadScheme = &ProtocolError{"bad scheme"}
+ ErrBadStatus = &ProtocolError{"bad status"}
+ ErrBadUpgrade = &ProtocolError{"missing or bad upgrade"}
+ ErrBadWebSocketOrigin = &ProtocolError{"missing or bad WebSocket-Origin"}
+ ErrBadWebSocketLocation = &ProtocolError{"missing or bad WebSocket-Location"}
+ ErrBadWebSocketProtocol = &ProtocolError{"missing or bad WebSocket-Protocol"}
+ ErrBadWebSocketVersion = &ProtocolError{"missing or bad WebSocket Version"}
+ ErrChallengeResponse = &ProtocolError{"mismatch challenge/response"}
+ ErrBadFrame = &ProtocolError{"bad frame"}
+ ErrBadFrameBoundary = &ProtocolError{"not on frame boundary"}
+ ErrNotWebSocket = &ProtocolError{"not websocket protocol"}
+ ErrBadRequestMethod = &ProtocolError{"bad method"}
+ ErrNotSupported = &ProtocolError{"not supported"}
+)
+
+// ErrFrameTooLarge is returned by Codec's Receive method if payload size
+// exceeds limit set by Conn.MaxPayloadBytes
+var ErrFrameTooLarge = errors.New("websocket: frame payload size exceeds limit")
+
+// Addr is an implementation of net.Addr for WebSocket.
+type Addr struct {
+ *url.URL
+}
+
+// Network returns the network type for a WebSocket, "websocket".
+func (addr *Addr) Network() string { return "websocket" }
+
+// Config is a WebSocket configuration
+type Config struct {
+ // A WebSocket server address.
+ Location *url.URL
+
+ // A Websocket client origin.
+ Origin *url.URL
+
+ // WebSocket subprotocols.
+ Protocol []string
+
+ // WebSocket protocol version.
+ Version int
+
+ // TLS config for secure WebSocket (wss).
+ TlsConfig *tls.Config
+
+ // Additional header fields to be sent in WebSocket opening handshake.
+ Header http.Header
+
+ // Dialer used when opening websocket connections.
+ Dialer *net.Dialer
+
+ handshakeData map[string]string
+}
+
+// serverHandshaker is an interface to handle WebSocket server side handshake.
+type serverHandshaker interface {
+ // ReadHandshake reads handshake request message from client.
+ // Returns http response code and error if any.
+ ReadHandshake(buf *bufio.Reader, req *http.Request) (code int, err error)
+
+ // AcceptHandshake accepts the client handshake request and sends
+ // handshake response back to client.
+ AcceptHandshake(buf *bufio.Writer) (err error)
+
+ // NewServerConn creates a new WebSocket connection.
+ NewServerConn(buf *bufio.ReadWriter, rwc io.ReadWriteCloser, request *http.Request) (conn *Conn)
+}
+
+// frameReader is an interface to read a WebSocket frame.
+type frameReader interface {
+ // Reader is to read payload of the frame.
+ io.Reader
+
+ // PayloadType returns payload type.
+ PayloadType() byte
+
+ // HeaderReader returns a reader to read header of the frame.
+ HeaderReader() io.Reader
+
+ // TrailerReader returns a reader to read trailer of the frame.
+ // If it returns nil, there is no trailer in the frame.
+ TrailerReader() io.Reader
+
+ // Len returns total length of the frame, including header and trailer.
+ Len() int
+}
+
+// frameReaderFactory is an interface to creates new frame reader.
+type frameReaderFactory interface {
+ NewFrameReader() (r frameReader, err error)
+}
+
+// frameWriter is an interface to write a WebSocket frame.
+type frameWriter interface {
+ // Writer is to write payload of the frame.
+ io.WriteCloser
+}
+
+// frameWriterFactory is an interface to create new frame writer.
+type frameWriterFactory interface {
+ NewFrameWriter(payloadType byte) (w frameWriter, err error)
+}
+
+type frameHandler interface {
+ HandleFrame(frame frameReader) (r frameReader, err error)
+ WriteClose(status int) (err error)
+}
+
+// Conn represents a WebSocket connection.
+//
+// Multiple goroutines may invoke methods on a Conn simultaneously.
+type Conn struct {
+ config *Config
+ request *http.Request
+
+ buf *bufio.ReadWriter
+ rwc io.ReadWriteCloser
+
+ rio sync.Mutex
+ frameReaderFactory
+ frameReader
+
+ wio sync.Mutex
+ frameWriterFactory
+
+ frameHandler
+ PayloadType byte
+ defaultCloseStatus int
+
+ // MaxPayloadBytes limits the size of frame payload received over Conn
+ // by Codec's Receive method. If zero, DefaultMaxPayloadBytes is used.
+ MaxPayloadBytes int
+}
+
+// Read implements the io.Reader interface:
+// it reads data of a frame from the WebSocket connection.
+// if msg is not large enough for the frame data, it fills the msg and next Read
+// will read the rest of the frame data.
+// it reads Text frame or Binary frame.
+func (ws *Conn) Read(msg []byte) (n int, err error) {
+ ws.rio.Lock()
+ defer ws.rio.Unlock()
+again:
+ if ws.frameReader == nil {
+ frame, err := ws.frameReaderFactory.NewFrameReader()
+ if err != nil {
+ return 0, err
+ }
+ ws.frameReader, err = ws.frameHandler.HandleFrame(frame)
+ if err != nil {
+ return 0, err
+ }
+ if ws.frameReader == nil {
+ goto again
+ }
+ }
+ n, err = ws.frameReader.Read(msg)
+ if err == io.EOF {
+ if trailer := ws.frameReader.TrailerReader(); trailer != nil {
+ io.Copy(ioutil.Discard, trailer)
+ }
+ ws.frameReader = nil
+ goto again
+ }
+ return n, err
+}
+
+// Write implements the io.Writer interface:
+// it writes data as a frame to the WebSocket connection.
+func (ws *Conn) Write(msg []byte) (n int, err error) {
+ ws.wio.Lock()
+ defer ws.wio.Unlock()
+ w, err := ws.frameWriterFactory.NewFrameWriter(ws.PayloadType)
+ if err != nil {
+ return 0, err
+ }
+ n, err = w.Write(msg)
+ w.Close()
+ return n, err
+}
+
+// Close implements the io.Closer interface.
+func (ws *Conn) Close() error {
+ err := ws.frameHandler.WriteClose(ws.defaultCloseStatus)
+ err1 := ws.rwc.Close()
+ if err != nil {
+ return err
+ }
+ return err1
+}
+
+func (ws *Conn) IsClientConn() bool { return ws.request == nil }
+func (ws *Conn) IsServerConn() bool { return ws.request != nil }
+
+// LocalAddr returns the WebSocket Origin for the connection for client, or
+// the WebSocket location for server.
+func (ws *Conn) LocalAddr() net.Addr {
+ if ws.IsClientConn() {
+ return &Addr{ws.config.Origin}
+ }
+ return &Addr{ws.config.Location}
+}
+
+// RemoteAddr returns the WebSocket location for the connection for client, or
+// the Websocket Origin for server.
+func (ws *Conn) RemoteAddr() net.Addr {
+ if ws.IsClientConn() {
+ return &Addr{ws.config.Location}
+ }
+ return &Addr{ws.config.Origin}
+}
+
+var errSetDeadline = errors.New("websocket: cannot set deadline: not using a net.Conn")
+
+// SetDeadline sets the connection's network read & write deadlines.
+func (ws *Conn) SetDeadline(t time.Time) error {
+ if conn, ok := ws.rwc.(net.Conn); ok {
+ return conn.SetDeadline(t)
+ }
+ return errSetDeadline
+}
+
+// SetReadDeadline sets the connection's network read deadline.
+func (ws *Conn) SetReadDeadline(t time.Time) error {
+ if conn, ok := ws.rwc.(net.Conn); ok {
+ return conn.SetReadDeadline(t)
+ }
+ return errSetDeadline
+}
+
+// SetWriteDeadline sets the connection's network write deadline.
+func (ws *Conn) SetWriteDeadline(t time.Time) error {
+ if conn, ok := ws.rwc.(net.Conn); ok {
+ return conn.SetWriteDeadline(t)
+ }
+ return errSetDeadline
+}
+
+// Config returns the WebSocket config.
+func (ws *Conn) Config() *Config { return ws.config }
+
+// Request returns the http request upgraded to the WebSocket.
+// It is nil for client side.
+func (ws *Conn) Request() *http.Request { return ws.request }
+
+// Codec represents a symmetric pair of functions that implement a codec.
+type Codec struct {
+ Marshal func(v interface{}) (data []byte, payloadType byte, err error)
+ Unmarshal func(data []byte, payloadType byte, v interface{}) (err error)
+}
+
+// Send sends v marshaled by cd.Marshal as single frame to ws.
+func (cd Codec) Send(ws *Conn, v interface{}) (err error) {
+ data, payloadType, err := cd.Marshal(v)
+ if err != nil {
+ return err
+ }
+ ws.wio.Lock()
+ defer ws.wio.Unlock()
+ w, err := ws.frameWriterFactory.NewFrameWriter(payloadType)
+ if err != nil {
+ return err
+ }
+ _, err = w.Write(data)
+ w.Close()
+ return err
+}
+
+// Receive receives single frame from ws, unmarshaled by cd.Unmarshal and stores
+// in v. The whole frame payload is read to an in-memory buffer; max size of
+// payload is defined by ws.MaxPayloadBytes. If frame payload size exceeds
+// limit, ErrFrameTooLarge is returned; in this case frame is not read off wire
+// completely. The next call to Receive would read and discard leftover data of
+// previous oversized frame before processing next frame.
+func (cd Codec) Receive(ws *Conn, v interface{}) (err error) {
+ ws.rio.Lock()
+ defer ws.rio.Unlock()
+ if ws.frameReader != nil {
+ _, err = io.Copy(ioutil.Discard, ws.frameReader)
+ if err != nil {
+ return err
+ }
+ ws.frameReader = nil
+ }
+again:
+ frame, err := ws.frameReaderFactory.NewFrameReader()
+ if err != nil {
+ return err
+ }
+ frame, err = ws.frameHandler.HandleFrame(frame)
+ if err != nil {
+ return err
+ }
+ if frame == nil {
+ goto again
+ }
+ maxPayloadBytes := ws.MaxPayloadBytes
+ if maxPayloadBytes == 0 {
+ maxPayloadBytes = DefaultMaxPayloadBytes
+ }
+ if hf, ok := frame.(*hybiFrameReader); ok && hf.header.Length > int64(maxPayloadBytes) {
+ // payload size exceeds limit, no need to call Unmarshal
+ //
+ // set frameReader to current oversized frame so that
+ // the next call to this function can drain leftover
+ // data before processing the next frame
+ ws.frameReader = frame
+ return ErrFrameTooLarge
+ }
+ payloadType := frame.PayloadType()
+ data, err := ioutil.ReadAll(frame)
+ if err != nil {
+ return err
+ }
+ return cd.Unmarshal(data, payloadType, v)
+}
+
+func marshal(v interface{}) (msg []byte, payloadType byte, err error) {
+ switch data := v.(type) {
+ case string:
+ return []byte(data), TextFrame, nil
+ case []byte:
+ return data, BinaryFrame, nil
+ }
+ return nil, UnknownFrame, ErrNotSupported
+}
+
+func unmarshal(msg []byte, payloadType byte, v interface{}) (err error) {
+ switch data := v.(type) {
+ case *string:
+ *data = string(msg)
+ return nil
+ case *[]byte:
+ *data = msg
+ return nil
+ }
+ return ErrNotSupported
+}
+
+/*
+Message is a codec to send/receive text/binary data in a frame on WebSocket connection.
+To send/receive text frame, use string type.
+To send/receive binary frame, use []byte type.
+
+Trivial usage:
+
+ import "websocket"
+
+ // receive text frame
+ var message string
+ websocket.Message.Receive(ws, &message)
+
+ // send text frame
+ message = "hello"
+ websocket.Message.Send(ws, message)
+
+ // receive binary frame
+ var data []byte
+ websocket.Message.Receive(ws, &data)
+
+ // send binary frame
+ data = []byte{0, 1, 2}
+ websocket.Message.Send(ws, data)
+
+*/
+var Message = Codec{marshal, unmarshal}
+
+func jsonMarshal(v interface{}) (msg []byte, payloadType byte, err error) {
+ msg, err = json.Marshal(v)
+ return msg, TextFrame, err
+}
+
+func jsonUnmarshal(msg []byte, payloadType byte, v interface{}) (err error) {
+ return json.Unmarshal(msg, v)
+}
+
+/*
+JSON is a codec to send/receive JSON data in a frame from a WebSocket connection.
+
+Trivial usage:
+
+ import "websocket"
+
+ type T struct {
+ Msg string
+ Count int
+ }
+
+ // receive JSON type T
+ var data T
+ websocket.JSON.Receive(ws, &data)
+
+ // send JSON type T
+ websocket.JSON.Send(ws, data)
+*/
+var JSON = Codec{jsonMarshal, jsonUnmarshal}
generated by cgit v1.2.3 (git 2.25.1) at 2024-09-13 06:10:08 +0800