diff options
Diffstat (limited to 'vendor/golang.org/x/net')
| -rw-r--r-- | vendor/golang.org/x/net/websocket/client.go | 106 | ||||
| -rw-r--r-- | vendor/golang.org/x/net/websocket/dial.go | 24 | ||||
| -rw-r--r-- | vendor/golang.org/x/net/websocket/hybi.go | 583 | ||||
| -rw-r--r-- | vendor/golang.org/x/net/websocket/server.go | 113 | ||||
| -rw-r--r-- | vendor/golang.org/x/net/websocket/websocket.go | 448 |
5 files changed, 0 insertions, 1274 deletions
diff --git a/vendor/golang.org/x/net/websocket/client.go b/vendor/golang.org/x/net/websocket/client.go deleted file mode 100644 index 69a4ac7ee..000000000 --- a/vendor/golang.org/x/net/websocket/client.go +++ /dev/null @@ -1,106 +0,0 @@ -// 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 deleted file mode 100644 index 2dab943a4..000000000 --- a/vendor/golang.org/x/net/websocket/dial.go +++ /dev/null @@ -1,24 +0,0 @@ -// 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 deleted file mode 100644 index 8cffdd16c..000000000 --- a/vendor/golang.org/x/net/websocket/hybi.go +++ /dev/null @@ -1,583 +0,0 @@ -// 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 deleted file mode 100644 index 0895dea19..000000000 --- a/vendor/golang.org/x/net/websocket/server.go +++ /dev/null @@ -1,113 +0,0 @@ -// 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 deleted file mode 100644 index e242c89a7..000000000 --- a/vendor/golang.org/x/net/websocket/websocket.go +++ /dev/null @@ -1,448 +0,0 @@ -// 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. -// -// This package currently lacks some features found in an alternative -// and more actively maintained WebSocket package: -// -// https://godoc.org/github.com/gorilla/websocket -// -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} |