示例#1
0
// hello world, the web server
func HelloServer(c *http.Conn, req *http.Request)
{
  var creq CRequest;
  creq.conn = c;
  creq.req = req;
  //fmt.Printf("%s\n", creq.req);
  var e os.Error;
  creq.rwc, creq.buf, e = c.Hijack();
  if (e!=nil) {}
  req_channel <- creq;
}
示例#2
0
// ServeHTTP implements the http.Handler interface for a Web Socket.
func (f Draft75Handler) ServeHTTP(c *http.Conn, req *http.Request) {
	if req.Method != "GET" || req.Proto != "HTTP/1.1" {
		c.WriteHeader(http.StatusBadRequest)
		io.WriteString(c, "Unexpected request")
		return
	}
	if req.Header["Upgrade"] != "WebSocket" {
		c.WriteHeader(http.StatusBadRequest)
		io.WriteString(c, "missing Upgrade: WebSocket header")
		return
	}
	if req.Header["Connection"] != "Upgrade" {
		c.WriteHeader(http.StatusBadRequest)
		io.WriteString(c, "missing Connection: Upgrade header")
		return
	}
	origin, found := req.Header["Origin"]
	if !found {
		c.WriteHeader(http.StatusBadRequest)
		io.WriteString(c, "missing Origin header")
		return
	}

	rwc, buf, err := c.Hijack()
	if err != nil {
		panic("Hijack failed: " + err.String())
		return
	}
	defer rwc.Close()
	location := "ws://" + req.Host + req.URL.RawPath

	// TODO(ukai): verify origin,location,protocol.

	buf.WriteString("HTTP/1.1 101 Web Socket Protocol Handshake\r\n")
	buf.WriteString("Upgrade: WebSocket\r\n")
	buf.WriteString("Connection: Upgrade\r\n")
	buf.WriteString("WebSocket-Origin: " + origin + "\r\n")
	buf.WriteString("WebSocket-Location: " + location + "\r\n")
	protocol, found := req.Header["Websocket-Protocol"]
	// canonical header key of WebSocket-Protocol.
	if found {
		buf.WriteString("WebSocket-Protocol: " + protocol + "\r\n")
	}
	buf.WriteString("\r\n")
	if err := buf.Flush(); err != nil {
		return
	}
	ws := newConn(origin, location, protocol, buf, rwc)
	f(ws)
}
示例#3
0
文件: server.go 项目: 8l/go-learn
func serveHTTP(c *http.Conn, req *http.Request) {
	if req.Method != "CONNECT" {
		c.SetHeader("Content-Type", "text/plain; charset=utf-8")
		c.WriteHeader(http.StatusMethodNotAllowed)
		io.WriteString(c, "405 must CONNECT to "+rpcPath+"\n")
		return
	}
	conn, _, err := c.Hijack()
	if err != nil {
		log.Stderr("rpc hijacking ", c.RemoteAddr, ": ", err.String())
		return
	}
	io.WriteString(conn, "HTTP/1.0 "+connected+"\n\n")
	server.input(conn)
}
示例#4
0
// ServeHTTP implements the http.Handler interface for a Web Socket.
func (f Handler) ServeHTTP(c *http.Conn, req *http.Request) {
	if req.Method != "GET" || req.Proto != "HTTP/1.1" ||
		req.Header["Upgrade"] != "WebSocket" ||
		req.Header["Connection"] != "Upgrade" {
		c.WriteHeader(http.StatusNotFound)
		io.WriteString(c, "must use websocket to connect here")
		return
	}
	rwc, buf, err := c.Hijack()
	if err != nil {
		panic("Hijack failed: ", err.String())
		return
	}
	defer rwc.Close()
	origin := req.Header["Origin"]
	location := "ws://" + req.Host + req.URL.Path

	// TODO(ukai): verify origin,location,protocol.

	buf.WriteString("HTTP/1.1 101 Web Socket Protocol Handshake\r\n")
	buf.WriteString("Upgrade: WebSocket\r\n")
	buf.WriteString("Connection: Upgrade\r\n")
	buf.WriteString("WebSocket-Origin: " + origin + "\r\n")
	buf.WriteString("WebSocket-Location: " + location + "\r\n")
	protocol := ""
	// canonical header key of WebSocket-Protocol.
	if protocol, found := req.Header["Websocket-Protocol"]; found {
		buf.WriteString("WebSocket-Protocol: " + protocol + "\r\n")
	}
	buf.WriteString("\r\n")
	if err := buf.Flush(); err != nil {
		return
	}
	ws := newConn(origin, location, protocol, buf, rwc)
	f(ws)
}
示例#5
0
// ServeHTTP implements the http.Handler interface for a Web Socket
func (f Handler) ServeHTTP(c *http.Conn, req *http.Request) {
	rwc, buf, err := c.Hijack()
	if err != nil {
		panic("Hijack failed: " + err.String())
		return
	}
	// 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()

	if req.Method != "GET" {
		return
	}
	// HTTP version can be safely ignored.

	if strings.ToLower(req.Header["Upgrade"]) != "websocket" ||
		strings.ToLower(req.Header["Connection"]) != "upgrade" {
		return
	}

	// TODO(ukai): check Host
	origin, found := req.Header["Origin"]
	if !found {
		return
	}

	key1, found := req.Header["Sec-Websocket-Key1"]
	if !found {
		return
	}
	key2, found := req.Header["Sec-Websocket-Key2"]
	if !found {
		return
	}
	key3 := make([]byte, 8)
	if _, err := io.ReadFull(buf, key3); err != nil {
		return
	}

	location := "ws://" + req.Host + req.URL.RawPath

	// Step 4. get key number in Sec-WebSocket-Key<n> fields.
	keyNumber1 := getKeyNumber(key1)
	keyNumber2 := getKeyNumber(key2)

	// Step 5. get number of spaces in Sec-WebSocket-Key<n> fields.
	space1 := uint32(strings.Count(key1, " "))
	space2 := uint32(strings.Count(key2, " "))
	if space1 == 0 || space2 == 0 {
		return
	}

	// Step 6. key number must be an integral multiple of spaces.
	if keyNumber1%space1 != 0 || keyNumber2%space2 != 0 {
		return
	}

	// Step 7. let part be key number divided by spaces.
	part1 := keyNumber1 / space1
	part2 := keyNumber2 / space2

	// Step 8. let challenge to be concatination of part1, part2 and key3.
	challenge := make([]byte, 16)
	challengeBuf := bytes.NewBuffer(challenge)
	err = binary.Write(challengeBuf, binary.BigEndian, part1)
	if err != nil {
		return
	}
	err = binary.Write(challengeBuf, binary.BigEndian, part2)
	if err != nil {
		return
	}
	if n := copy(challenge[8:], key3); n != 8 {
		return
	}
	// Step 9. get MD5 fingerprint of challenge.
	h := md5.New()
	if _, err = h.Write(challenge); err != nil {
		return
	}
	response := h.Sum()

	// Step 10. send response status line.
	buf.WriteString("HTTP/1.1 101 WebSocket Protocol Handshake\r\n")
	// Step 11. send response headers.
	buf.WriteString("Upgrade: WebSocket\r\n")
	buf.WriteString("Connection: Upgrade\r\n")
	buf.WriteString("Sec-WebSocket-Location: " + location + "\r\n")
	buf.WriteString("Sec-WebSocket-Origin: " + origin + "\r\n")
	protocol, found := req.Header["Sec-WebSocket-Protocol"]
	if found {
		buf.WriteString("Sec-WebSocket-Protocol: " + protocol + "\r\n")
	}
	// Step 12. send CRLF.
	buf.WriteString("\r\n")
	// Step 13. send response data.
	buf.Write(response)
	if err := buf.Flush(); err != nil {
		return
	}
	ws := newConn(origin, location, protocol, buf, rwc)
	f(ws)
}