C# ClientWebSocket.ConnectAsync方法代码示例

        private void TestWebSockets()
        {
            var socket = new ClientWebSocket();
            Console.WriteLine("Connecting");
            socket.ConnectAsync(new Uri("wss://echo.websocket.org"), CancellationToken.None).Wait();

            Console.WriteLine("Sending");
            socket.SendAsync(new ArraySegment<byte>(Encoding.UTF8.GetBytes("Hello")), WebSocketMessageType.Text, true, CancellationToken.None).Wait();

            var buffer = new byte[1024];
            Console.WriteLine("Receiving");
            var result = socket.ReceiveAsync(new ArraySegment<byte>(buffer), CancellationToken.None).Result;

            Console.WriteLine($"Recieved: {Encoding.UTF8.GetString(buffer, 0, result.Count)}");
        }

        public virtual Stream Connect(Uri uri, bool requireAuthentication) {
            // IIS starts python.exe processes lazily on the first incoming request, and will terminate them after a period
            // of inactivity, making it impossible to attach. So before trying to connect to the debugger, "ping" the website
            // via HTTP to ensure that we have something to connect to.
            try {
                var httpRequest = WebRequest.Create(new UriBuilder(uri) { Scheme = "http", Port = -1, Path = "/" }.Uri);
                httpRequest.Method = WebRequestMethods.Http.Head;
                httpRequest.Timeout = 5000;
                httpRequest.GetResponse().Dispose();
            } catch (WebException) {
                // If it fails or times out, just go ahead and try to connect anyway, and rely on normal error reporting path.
            }

            var webSocket = new ClientWebSocket();
            try {
                webSocket.ConnectAsync(uri, CancellationToken.None).GetAwaiter().GetResult();
                var stream = new WebSocketStream(webSocket, ownsSocket: true);
                webSocket = null;
                return stream;
            } catch (WebSocketException ex) {
                throw new ConnectionException(ConnErrorMessages.RemoteNetworkError, ex);
            } catch (IOException ex) {
                throw new ConnectionException(ConnErrorMessages.RemoteNetworkError, ex);
            } catch (PlatformNotSupportedException ex) {
                throw new ConnectionException(ConnErrorMessages.RemoteUnsupportedTransport, ex);
            } finally {
                if (webSocket != null) {
                    webSocket.Dispose();
                }
            }
        }

        public async void ConnectAndStartReceivingToWebSocket()
        {
            ClientWebSocket webSocket = null;
            var uncontext = new Uri(_wsLiteratureUncontextCom);

            try
            {
                webSocket = new ClientWebSocket();
                await webSocket.ConnectAsync(uncontext, CancellationToken.None);
                await Receive(webSocket);
            }
            catch (Exception ex)
            {
                Console.WriteLine("Exception: {0}", ex);
            }
            finally
            {
                if (webSocket != null)
                {
                    webSocket.Dispose();
                    UncontextedData.OnCompleted();
                }
                Console.WriteLine("Closed websocket.");
            }
        }

		public void BasicRoundTrip()
		{
			var serializer = new JsonCommonSerializer();

			var port = new Random().Next(6000, 60000);

			var options = new WebSocketListenerOptions();
			options.SubProtocols = new[] { "SignalR" };
			var listener = new WebSocketListener(new IPEndPoint(IPAddress.Loopback, port), options);
			var rfc6455 = new vtortola.WebSockets.Rfc6455.WebSocketFactoryRfc6455(listener);
			listener.Standards.RegisterStandard(rfc6455);
			var serverTransport = listener.GenerateTransportSource();
			var serverRouter = new DefaultMessageRouter(serverTransport, serializer);
			serverRouter.AddService<IMyService>(new MyService());
			listener.Start();

			var client = new ClientWebSocket();
			client.Options.AddSubProtocol("SignalR");
			var clientTransport = client.GenerateTransportSource();
			var clientRouter = new DefaultMessageRouter(clientTransport, serializer);
			var proxy = clientRouter.AddInterface<IMyService>();
			client.ConnectAsync(new Uri("ws://localhost:" + port + "/"), CancellationToken.None).Wait();

			var result = proxy.Add(3, 4).Result;
			Assert.Equal(7, result);

			clientRouter.Dispose();
			clientTransport.Dispose();
			client.Dispose();

			serverRouter.Dispose();
			serverTransport.Dispose();
			listener.Dispose();
		}

        public static async Task Run(Control control, Bitmap bitmap)
        {
            using (var webSocket = new ClientWebSocket())
            {
                var stream = new WebSocketStream(webSocket);

                await webSocket.ConnectAsync(new Uri("ws://localhost:5050/ws"), CancellationToken.None);

                await DispatchStartAsync(control, bitmap, stream);

                while (true)
                {
                    await DispatchDeltaAsync(control, bitmap, stream);
                }
            }
        }

        public static async Task RunSample()
        {
            ClientWebSocket websocket = new ClientWebSocket();

            string url = "ws://localhost:7000/";
            Console.WriteLine("Connecting to: " + url);
            await websocket.ConnectAsync(new Uri(url), CancellationToken.None);

            int seed = 20000;
            Task[] taskList = new Task[seed];

            Stopwatch sw = new Stopwatch();
            sw.Restart();
            for (var i = 0; i < seed; i++)
            {
                //taskList[i] = Send(websocket);
                await Send(websocket);
            }

            //Task.WaitAll(taskList);
            sw.Stop();
            Console.WriteLine("seed:{0}, time:{1}", seed, sw.ElapsedMilliseconds);

            //if (result.CloseStatus.HasValue)
            //{
            //    Console.WriteLine("Closed; Status: " + result.CloseStatus + ", " + result.CloseStatusDescription);
            //}
            //else
            //{
            //    Console.WriteLine("Received message: " + Encoding.UTF8.GetString(incomingData, 0, result.Count));
            //}
        }

        public static async Task Connect(string uri)
        {
            ClientWebSocket webSocket = null;

            try
            {
                webSocket = new ClientWebSocket();
                await webSocket.ConnectAsync(new Uri(uri), CancellationToken.None);
                await Task.WhenAll(Receive(webSocket), Send(webSocket));
            }
            catch (Exception ex)
            {
                Console.WriteLine("Exception: {0}", ex);
            }
            finally
            {
                if (webSocket != null)
                    webSocket.Dispose();
                Console.WriteLine();

                lock (consoleLock)
                {
                    Console.ForegroundColor = ConsoleColor.Red;
                    Console.WriteLine("WebSocket closed.");
                    Console.ResetColor();
                }
            }
        }

        public async Task WebsocketBasic(HostType hostType)
        {
            using (ApplicationDeployer deployer = new ApplicationDeployer())
            {
                string applicationUrl = deployer.Deploy(hostType, WebsocketBasicConfiguration);

                using (var client = new ClientWebSocket())
                {
                    await client.ConnectAsync(new Uri(applicationUrl.Replace("http://", "ws://")), CancellationToken.None);

                    var receiveBody = new byte[100];

                    for (int i = 0; i < 4; i++)
                    {
                        var message = "Message " + i.ToString();
                        byte[] sendBody = Encoding.UTF8.GetBytes(message);
                        await client.SendAsync(new ArraySegment<byte>(sendBody), WebSocketMessageType.Text, true, CancellationToken.None);
                        var receiveResult = await client.ReceiveAsync(new ArraySegment<byte>(receiveBody), CancellationToken.None);

                        Assert.Equal(WebSocketMessageType.Text, receiveResult.MessageType);
                        Assert.True(receiveResult.EndOfMessage);
                        Assert.Equal(sendBody.Length, receiveResult.Count);
                        Assert.Equal(message, Encoding.UTF8.GetString(receiveBody, 0, receiveResult.Count));
                    }
                }
            }
        }

        public static async Task RunSample()
        {
            ClientWebSocket websocket = new ClientWebSocket();

            string url = "ws://localhost:5000/";
            Console.WriteLine("Connecting to: " + url);
            await websocket.ConnectAsync(new Uri(url), CancellationToken.None);

            string message = "Hello World";
            Console.WriteLine("Sending message: " + message);
            byte[] messageBytes = Encoding.UTF8.GetBytes(message);
            await websocket.SendAsync(new ArraySegment<byte>(messageBytes), WebSocketMessageType.Text, true, CancellationToken.None);

            byte[] incomingData = new byte[1024];
            WebSocketReceiveResult result = await websocket.ReceiveAsync(new ArraySegment<byte>(incomingData), CancellationToken.None);

            if (result.CloseStatus.HasValue)
            {
                Console.WriteLine("Closed; Status: " + result.CloseStatus + ", " + result.CloseStatusDescription);
            }
            else
            {
                Console.WriteLine("Received message: " + Encoding.UTF8.GetString(incomingData, 0, result.Count));
            }
        }

        internal async Task<IAsyncTransport> ConnectAsync(Address address, Action<ClientWebSocketOptions> options)
        {
            Uri uri = new UriBuilder()
            {
                Scheme = address.Scheme,
                Port = GetDefaultPort(address.Scheme, address.Port),
                Host = address.Host,
                Path = address.Path
            }.Uri;

            ClientWebSocket cws = new ClientWebSocket();
            cws.Options.AddSubProtocol(WebSocketSubProtocol);
            if (options != null)
            {
                options(cws.Options);
            }

            await cws.ConnectAsync(uri, CancellationToken.None);
            if (cws.SubProtocol != WebSocketSubProtocol)
            {
                cws.Abort();

                throw new NotSupportedException(
                    string.Format(
                        CultureInfo.InvariantCulture,
                        "WebSocket SubProtocol used by the host is not the same that was requested: {0}",
                        cws.SubProtocol ?? "<null>"));
            }

            this.webSocket = cws;

            return this;
        }

		public void BasicRoundTrip()
		{
			var serializer = new JsonCommonSerializer();

			var server = new HttpListener();
			server.Prefixes.Add("http://localhost:20000/");
			server.Start();
			var serverTransport = server.GenerateTransportSource();
			var serverRouter = new DefaultMessageRouter(serverTransport, serializer);
			serverRouter.AddService<IMyService>(new MyService());

			var client = new ClientWebSocket();
			client.Options.SetBuffer(8192, 8192);
			var clientTransport = client.GenerateTransportSource();
			var clientRouter = new DefaultMessageRouter(clientTransport, serializer);
			var proxy = clientRouter.AddInterface<IMyService>();

			client.ConnectAsync(new Uri("ws://localhost:20000/"), CancellationToken.None).Wait();

			var result = proxy.Add(3, 4).Result;
			Assert.Equal(7, result);

			clientRouter.Dispose();
			clientTransport.Dispose();
			client.Dispose();

			serverRouter.Dispose();
			serverTransport.Dispose();
			server.Stop();
			server.Close();
		}

        public async void TestConnectWebSocket()
        {
            if (TestHelper.IsMono)
            {
                Assert.Inconclusive("Mono doesn't have support to WebSockets");
            }

            Assert.IsNotNull(WebServer.Module<WebSocketsModule>(), "WebServer has WebSocketsModule");

            Assert.AreEqual(WebServer.Module<WebSocketsModule>().Handlers.Count, 1, "WebSocketModule has one handler");

            var clientSocket = new ClientWebSocket();
            var ct = new CancellationTokenSource();
            await clientSocket.ConnectAsync(new Uri(Resources.WsServerAddress + "/test"), ct.Token);

            Assert.AreEqual(clientSocket.State, WebSocketState.Open, "Connection is open");

            var message = new ArraySegment<byte>(System.Text.Encoding.Default.GetBytes("HOLA"));
            var buffer = new ArraySegment<byte>(new byte[1024]);

            await clientSocket.SendAsync(message, WebSocketMessageType.Text, true, ct.Token);
            var result = await clientSocket.ReceiveAsync(buffer, ct.Token);

            Assert.IsTrue(result.EndOfMessage);
            Assert.IsTrue(System.Text.Encoding.UTF8.GetString(buffer.Array).TrimEnd((char) 0) == "WELCOME");
        }

        public async Task ListenAsync()
        {
            var socket = new ClientWebSocket();
            await socket.ConnectAsync(new Uri(ServerUrl.Replace("http://", "ws://")), CancellationToken.None);

            // listen for updates
            await Receive(socket);
        }

		public void ConnectPusher()
		{
			_ws = new ClientWebSocket();
			_ws.ConnectAsync(new Uri("wss://ws.pusherapp.com/app/de504dc5763aeef9ff52?client=PC-Orbit&version=1.0&protocol=7"), _source.Token).Wait();
			
			_connected = true;

			ThreadingHelper.Thread(OnReceive).Launch();
		}

    protected override void Main()
    {
      if (Environment.OSVersion.Version < new Version(6, 2))
      {
        TraceError(Text.LabRequiresWindows8OrHigher);
        return;
      }

      const int port = 5494;
      string subProtocol = GetType().Name;

      var userMessages = new BehaviorSubject<string>(null);

      var client = new ClientWebSocket();

      client.Options.AddSubProtocol(subProtocol);

      using (client)
      using (var cancel = new CancellationDisposable())
      using (ObservableHttpListener
        .StartWebSockets(new IPEndPoint(IPAddress.Loopback, port), subProtocol)
        .Subscribe(
          async request =>
          {
            using (var socket = request.WebSocket)
            {
              try
              {
                var message = await ReceiveMessageAsync(socket, cancel.Token);
                await SendMessageAsync("You sent \"" + message + "\"", socket, cancel.Token);
                await ReceiveCloseMessageAsync(socket, cancel.Token);
              }
              catch (OperationCanceledException)
              {
              }
            }
          },
          TraceError))
      using ((from _ in client.ConnectAsync(new Uri("ws://localhost:" + port), cancel.Token).ToObservable()
                .Do(_ => TraceLine(Environment.NewLine + "(Connected to host on sub-protocol \"{0}\")", client.SubProtocol))
              from message in userMessages.Where(m => m != null).Take(1)
              from __ in SendMessageAsync(message, client, cancel.Token).ToObservable()
              from response in ReceiveMessageAsync(client, cancel.Token).ToObservable()
                .Do(___ => client.CloseAsync(WebSocketCloseStatus.NormalClosure, "Done", cancel.Token))
              select response)
              .Subscribe(
                response => TraceLine("Response: {0}", response),
                TraceError,
                () => TraceLine("{0}: {1}", Text.Client, Text.Done)))
      {
        userMessages.OnNext(UserInput("{0}> ", Instructions.EnterAMessage));

        TraceStatus(Instructions.PressAnyKeyToCancel);

        WaitForKey();
      }
    }