Golang websocket.DialConfig函數代碼示例

func (c *WebsocketClient) ConnectOnce() error {
	c.logger.Debug("ConnectOnce:call")
	defer c.logger.Debug("ConnectOnce:return")

	// Make websocket connection.  If this fails, either API is down or the ws
	// address is wrong.
	link := c.api.AgentLink(c.link)
	c.logger.Debug("ConnectOnce:link:" + link)
	config, err := websocket.NewConfig(link, c.api.Origin())
	if err != nil {
		return err
	}
	config.Header.Add("X-Percona-API-Key", c.api.ApiKey())

	c.logger.Debug("ConnectOnce:websocket.DialConfig")
	c.status.Update(c.name, "Connecting "+link)
	conn, err := websocket.DialConfig(config)
	if err != nil {
		return err
	}

	c.mux.Lock()
	defer c.mux.Unlock()
	c.connected = true
	c.conn = conn
	c.status.Update(c.name, "Connected "+link)

	return nil
}

// newWebsocketDialer returns a function that
// can be passed to utils/parallel.Try.Start.
func newWebsocketDialer(cfg *websocket.Config, opts DialOpts) func(<-chan struct{}) (io.Closer, error) {
	openAttempt := utils.AttemptStrategy{
		Total: opts.Timeout,
		Delay: opts.RetryDelay,
	}
	return func(stop <-chan struct{}) (io.Closer, error) {
		for a := openAttempt.Start(); a.Next(); {
			select {
			case <-stop:
				return nil, parallel.ErrStopped
			default:
			}
			logger.Infof("dialing %q", cfg.Location)
			conn, err := websocket.DialConfig(cfg)
			if err == nil {
				return conn, nil
			}
			if a.HasNext() {
				logger.Debugf("error dialing %q, will retry: %v", cfg.Location, err)
			} else {
				logger.Infof("error dialing %q: %v", cfg.Location, err)
				return nil, fmt.Errorf("unable to connect to %q", cfg.Location)
			}
		}
		panic("unreachable")
	}
}

func (proxy *Proxy) HandleWebSocket(clientWS *websocket.Conn) {
	req := clientWS.Request()
	req.ParseForm()
	req.Form.Get("app")
	clientAddress := clientWS.RemoteAddr()

	appId := req.Form.Get("app")

	extractAuthTokenFromUrl := func(u *url.URL) string {
		authorization := ""
		queryValues := u.Query()
		if len(queryValues["authorization"]) == 1 {
			authorization = queryValues["authorization"][0]
		}
		return authorization
	}

	authToken := clientWS.Request().Header.Get("Authorization")
	if authToken == "" {
		authToken = extractAuthTokenFromUrl(req.URL)
	}

	if authorized, errorMessage := proxy.isAuthorized(appId, authToken, clientAddress); !authorized {
		data, err := proto.Marshal(errorMessage)
		if err != nil {
			proxy.logger.Errorf("Error marshalling log message: %s", err)
		}
		websocket.Message.Send(clientWS, data)
		clientWS.Close()
		return
	}

	defer clientWS.Close()

	proxy.logger.Debugf("Output Proxy: Request for app: %v", req.Form.Get("app"))
	serverWSs := make([]*websocket.Conn, len(proxy.hashers))
	for index, hasher := range proxy.hashers {
		proxy.logger.Debugf("Output Proxy: Servers in group [%v]: %v", index, hasher.LoggregatorServers())

		server := hasher.GetLoggregatorServerForAppId(appId)
		proxy.logger.Debugf("Output Proxy: AppId is %v. Using server: %v", appId, server)

		config, err := websocket.NewConfig("ws://"+server+req.URL.RequestURI(), "http://localhost")

		if err != nil {
			proxy.logger.Errorf("Output Proxy: Error creating config for websocket - %v", err)
		}

		serverWS, err := websocket.DialConfig(config)
		if err != nil {
			proxy.logger.Errorf("Output Proxy: Error connecting to loggregator server - %v", err)
		}

		if serverWS != nil {
			serverWSs[index] = serverWS
		}
	}
	proxy.forwardIO(serverWSs, clientWS)

}

func (repo LoggregatorLogsRepository) connectToWebsocket(location string, app cf.Application, onConnect func(), outputChan chan *logmessage.Message, stopLoggingChan chan bool, printTimeBuffer time.Duration) (err error) {

	trace.Logger.Printf("\n%s %s\n", terminal.HeaderColor("CONNECTING TO WEBSOCKET:"), location)

	config, err := websocket.NewConfig(location, "http://localhost")
	if err != nil {
		return
	}

	config.Header.Add("Authorization", repo.config.AccessToken)
	config.TlsConfig = &tls.Config{InsecureSkipVerify: true}

	ws, err := websocket.DialConfig(config)
	if err != nil {
		return
	}

	onConnect()

	inputChan := make(chan *logmessage.Message, 1000)

	go repo.sendKeepAlive(ws)
	go repo.listenForMessages(ws, inputChan, stopLoggingChan)
	go makeAndStartMessageSorter(inputChan, outputChan, stopLoggingChan, printTimeBuffer)

	return
}

func (repo LoggregatorLogsRepository) connectToWebsocket(location string, onConnect func(), outputChan chan *logmessage.Message, stopLoggingChan chan bool, printTimeBuffer time.Duration) (err error) {
	trace.Logger.Printf("\n%s %s\n", terminal.HeaderColor("CONNECTING TO WEBSOCKET:"), location)

	config, err := websocket.NewConfig(location, "http://localhost")
	if err != nil {
		return
	}

	config.Header.Add("Authorization", repo.config.AccessToken)
	config.TlsConfig = &tls.Config{InsecureSkipVerify: true}

	ws, err := websocket.DialConfig(config)
	if err != nil {
		return
	}
	defer ws.Close()

	onConnect()

	go repo.sendKeepAlive(ws)

	inputChan := make(chan *logmessage.Message, LogBufferSize)
	stopInputChan := make(chan bool, 1)
	go func() {
		defer close(stopInputChan)
		defer close(inputChan)
		repo.listenForMessages(ws, inputChan, stopInputChan)
	}()

	messageQueue := &SortedMessageQueue{printTimeBuffer: printTimeBuffer}

	repo.processMessages(messageQueue, inputChan, outputChan, stopLoggingChan, stopInputChan)

	return
}

func New(key, secret string, currencies ...string) (*StreamingApi, error) {
	url := fmt.Sprintf("%s%s?Currency=%s", api_host, api_path, strings.Join(currencies, ","))
	config, _ := websocket.NewConfig(url, origin_url)
	ws, err := websocket.DialConfig(config)

	if err != nil {
		return nil, err
	}

	api := &StreamingApi{
		ws:     ws,
		Ticker: make(chan Ticker),
		Info:   make(chan Info),
		Depth:  make(chan Depth),
		Trade:  make(chan Trade),
		Orders: make(chan []Order),
	}

	api.key, err = hex.DecodeString(strings.Replace(key, "-", "", -1))
	if err != nil {
		return nil, err
	}

	api.secret, err = base64.StdEncoding.DecodeString(secret)
	if err != nil {
		return nil, err
	}

	return api, err
}

func New(cfg *websocket.Config) (*JsonWebsocket, error) {
	ws, err := websocket.DialConfig(cfg)
	if err != nil {
		return nil, err
	}

	return &JsonWebsocket{ws: ws}, nil
}

func KeepAliveClient(t *testing.T, port string, path string) {
	config, err := websocket.NewConfig("ws://localhost:"+port+path, "http://localhost")
	config.Header.Add("Authorization", testhelpers.VALID_AUTHENTICATION_TOKEN)
	assert.NoError(t, err)
	ws, err := websocket.DialConfig(config)
	assert.NoError(t, err)

	websocket.Message.Send(ws, []byte("keep alive"))
}

func (s *debugLogSuite) dialWebsocketFromURL(c *gc.C, server string, header http.Header) (*websocket.Conn, error) {
	c.Logf("dialing %v", server)
	config, err := websocket.NewConfig(server, "http://localhost/")
	c.Assert(err, gc.IsNil)
	config.Header = header
	caCerts := x509.NewCertPool()
	c.Assert(caCerts.AppendCertsFromPEM([]byte(testing.CACert)), jc.IsTrue)
	config.TlsConfig = &tls.Config{RootCAs: caCerts, ServerName: "anything"}
	return websocket.DialConfig(config)
}

// Create a New SocketCluster Client
func NewClient(auth AuthDetails, dbpath string) (*Client, error) {
	Info = log.New(os.Stdout, "SOCKETCLUSTER: ", log.Ltime|log.Lshortfile)

	origin := "http://localhost"
	prefix := "ws"
	if auth.SecureWS {
		prefix = "wss"
	}

	url := fmt.Sprintf("%s://%s/socketcluster/", prefix, auth.Host)

	config, _ := websocket.NewConfig(url, origin)
	config.Header.Add("User-Agent", auth.UserAgent)

	Info.Println("Connecting: " + url)
	ws, err := websocket.DialConfig(config)
	if err != nil {
		Info.Println(err)
		return nil, err
	}

	c := &Client{
		ws:       ws,
		id:       0,
		mutex:    &sync.Mutex{},
		quitChan: make(chan int),
	}

	c.setupDB(dbpath)

	// Connection succeded. Send a handshake event.
	c.emit(c.NewEvent("#handshake", makeHandshakeData()))

	rEvent, err := c.recieve()

	if err != nil {
		Info.Println(err)
		return nil, errors.New("#handshake recieve error")
	}

	// Start listening to events
	go c.listen()

	if rEvent.Rid == 1 {
		if !isAuthenticated(rEvent) {
			c.emit(c.NewEvent("clearoldsessions", makeClearOldSessionsData(auth)))

			c.loginEvent = c.NewEvent("login", makeLoginData(auth))
			c.emit(c.loginEvent)
		}
	}

	return c, nil
}

func RunClient(url string, id string, userKey string) {
	rootPath, _ = filepath.Abs(rootPath)
	ListenForSignals()
	socketUrl := fmt.Sprintf("%s/clientsocket", url)
	var ws *websocket.Conn
	var timeout time.Duration = 1e8
	config, err := websocket.NewConfig(socketUrl, socketUrl)
	if err != nil {
		fmt.Println(err)
		return
	}
	config.TlsConfig = new(tls.Config)
	// Disable this when getting a proper certificate
	config.TlsConfig.InsecureSkipVerify = true
	for {
		time.Sleep(timeout)
		var err error
		ws, err = websocket.DialConfig(config)
		timeout *= 2
		if err != nil {
			fmt.Println("Could not yet connect:", err.Error(), ", trying again in", timeout)
		} else {
			break
		}
	}

	buffer, _ := json.Marshal(HelloMessage{"0.1", id, userKey})

	if _, err := ws.Write(buffer); err != nil {
		log.Fatal(err)
		return
	}
	connectUrl := strings.Replace(url, "ws://", "http://", 1)
	connectUrl = strings.Replace(connectUrl, "wss://", "https://", 1)
	multiplexer := NewRPCMultiplexer(ws, handleRequest)

	if userKey == "" {
		fmt.Print("In the Zed application copy and paste following URL to edit:\n\n")
		fmt.Printf("  %s/fs/%s\n\n", connectUrl, id)
	} else {
		fmt.Println("A Zed window should now open. If not, make sure Zed is running and configured with the correct userKey.")
	}
	fmt.Println("Press Ctrl-c to quit.")
	err = multiplexer.Multiplex()
	if err != nil {
		// TODO do this in a cleaner way (reconnect, that is)
		if err.Error() == "no-client" {
			fmt.Printf("ERROR: Your Zed editor is not currently connected to zedrem server %s.\nBe sure Zed is running and the project picker is open.\n", url)
		} else {
			RunClient(url, id, userKey)
		}
	}
}

func dialWebsocket(c *gc.C, addr, path string) (*websocket.Conn, error) {
	origin := "http://localhost/"
	url := fmt.Sprintf("wss://%s%s", addr, path)
	config, err := websocket.NewConfig(url, origin)
	c.Assert(err, gc.IsNil)
	pool := x509.NewCertPool()
	xcert, err := cert.ParseCert(coretesting.CACert)
	c.Assert(err, gc.IsNil)
	pool.AddCert(xcert)
	config.TlsConfig = &tls.Config{RootCAs: pool}
	return websocket.DialConfig(config)
}

func AssertConnectionFails(t *testing.T, port string, path string, expectedErrorCode uint16) {
	config, err := websocket.NewConfig("ws://localhost:"+port+path, "http://localhost")
	assert.NoError(t, err)

	ws, err := websocket.DialConfig(config)
	assert.NoError(t, err)
	data := make([]byte, 2)
	_, err = ws.Read(data)
	errorCode := binary.BigEndian.Uint16(data)
	assert.Equal(t, expectedErrorCode, errorCode)
	assert.Equal(t, "EOF", err.Error())
}

func Open(info *Info, opts DialOpts) (*State, error) {
	// TODO Select a random address from info.Addrs
	// and only fail when we've tried all the addresses.
	// TODO what does "origin" really mean, and is localhost always ok?
	cfg, err := websocket.NewConfig("wss://"+info.Addrs[0]+"/", "http://localhost/")
	if err != nil {
		return nil, err
	}
	pool := x509.NewCertPool()
	xcert, err := cert.ParseCert(info.CACert)
	if err != nil {
		return nil, err
	}
	pool.AddCert(xcert)
	cfg.TlsConfig = &tls.Config{
		RootCAs:    pool,
		ServerName: "anything",
	}
	var conn *websocket.Conn
	openAttempt := utils.AttemptStrategy{
		Total: opts.Timeout,
		Delay: opts.RetryDelay,
	}
	for a := openAttempt.Start(); a.Next(); {
		log.Infof("state/api: dialing %q", cfg.Location)
		conn, err = websocket.DialConfig(cfg)
		if err == nil {
			break
		}
		log.Errorf("state/api: %v", err)
	}
	if err != nil {
		return nil, err
	}
	log.Infof("state/api: connection established")

	client := rpc.NewConn(jsoncodec.NewWebsocket(conn))
	client.Start()
	st := &State{
		client: client,
		conn:   conn,
	}
	if info.Tag != "" || info.Password != "" {
		if err := st.Login(info.Tag, info.Password, info.Nonce); err != nil {
			conn.Close()
			return nil, err
		}
	}
	st.broken = make(chan struct{})
	go st.heartbeatMonitor()
	return st, nil
}

func WaitForServerStart(port string, path string) {
	serverStarted := func() bool {
		config, err := websocket.NewConfig("ws://localhost:"+port+path, "http://localhost")
		_, err = websocket.DialConfig(config)
		if err != nil {
			return false
		}
		return true
	}
	for !serverStarted() {
		time.Sleep(1 * time.Microsecond)
	}
}