SocketCluster - 无法从 Android 应用程序连接到服务器 - 连接被拒绝

Question

我正在尝试运行 socketcluster-android-client 演示应用程序 (https://github.com/sacOO7/socketcluster-android-demo)。我的服务器在 localhost:8000 成功运行。我正在通过手机连接到：ws://localhost:8000/socketcluster/。

当我尝试运行应用程序时，连接失败并出现以下错误：

Got connect error com.neovisionaries.ws.client.WebSocketException: Failed to connect to 'localhost:8000': failed to connect to localhost/127.0.0.1 (port 8000) from /127.0.0.1 (port 42405) after 5000ms: isConnected failed: ECONNREFUSED (Connection refused)

我已经验证了以下内容（来自其他 SO 答案）：

• 防火墙访问
• 成功 telnet 到 localhost:8000
• 运行服务器的电脑和我的手机在同一个 wifi 网络上
• 升级到最新节点版本

这是尝试连接到套接字的代码：

socket = new Socket(url);
socket.setListener(new BasicListener() {

    public void onConnected(Socket socket, Map<String, List<String>> headers) {
        socket.createChannel("MyClassroom").subscribe(new Ack() {
            @Override
            public void call(String name, Object error, Object data) {
                if (error==null){
                    Log.i ("Success","subscribed to channel "+name);
                }
            }
        });
        Log.i("Success ","Connected to endpoint");
    }

    public void onDisconnected(Socket socket, WebSocketFrame serverCloseFrame, WebSocketFrame clientCloseFrame, boolean closedByServer) {
        Log.i("Success ","Disconnected from end-point");
    }

    public void onConnectError(Socket socket,WebSocketException exception) {
        Log.i("Success ","Got connect error "+ exception);
    }

    public void onSetAuthToken(String token, Socket socket) {
        socket.setAuthToken(token);
    }

    public void onAuthentication(Socket socket,Boolean status) {
        if (status) {
            Log.i("Success ","socket is authenticated");
        } else {
            Log.i("Success ","Authentication is required (optional)");
        }
    }

});

socket.setReconnection(new ReconnectStrategy().setMaxAttempts(10).setDelay(3000));

socket.connectAsync();

Answer 1

我必须在 URL 中使用 PC 的 IP 地址。将ws://localhost:8000/socketcluster/ 替换为ws://<PC's IP address>:8000/socketcluster/。