使用Nodejs + SocketIO时丢弃传输错误
我正在构build一个android聊天应用程序。 我在服务器端使用nodejs ，并试图使用这个实现socketIO的android客户端。 首先，客户端向服务器回应“hello”，服务器将其回送给客户端。 这工作正常。 现在有一个Button ，当按下时， EditText的文本回传给服务器。 服务器应该回显文本回到客户端。 但是，一旦文本回显到服务器，我就会在服务器端Discarding transport错误，并且没有任何回应。 客户端无法进一步回应。 这些代码有什么问题？
服务器
var http = require('http'),fs = require('fs'); var app = http.createServer(function (req, res) { res.end(); }).listen(8000, '127.0.0.1'); var io = require('socket.io').listen(app); io.sockets.on('connection', function(socket) { socket.on('echo', function(data) { socket.emit('echoback', data); }); });
客户
package com.jack.pri; import java.net.MalformedURLException; import org.json.JSONException; import org.json.JSONObject; import android.os.Bundle; import android.app.Activity; import android.util.Log; import android.view.KeyEvent; import android.view.Menu; import android.view.View; import android.view.View.OnClickListener; import android.view.View.OnKeyListener; import android.widget.Button; import android.widget.EditText; import android.widget.TextView; import io.socket.*; public class MainActivity extends Activity { private SocketIO socket; private TextView tview; private Button btn; private EditText tt; private String k; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); tview=(TextView) findViewById(R.id.tv); tt = (EditText) findViewById(R.id.et); btn = (Button) findViewById(R.id.button1); //socket = null; try { socket = new SocketIO("http://10.0.2.2:8000"); } catch (MalformedURLException e) { // TODO Auto-generated catch block e.printStackTrace(); } socket.connect(new IOCallback() { @Override public void on(String event, IOAcknowledge ack, Object... args) { if ("echoback".equals(event) && args.length > 0) { tview.setText(""+args[0]); Log.e("received",""+args[0]); } } @Override public void onMessage(JSONObject json, IOAcknowledge ack) {} @Override public void onMessage(String data, IOAcknowledge ack) {} @Override public void onError(SocketIOException socketIOException) { socketIOException.printStackTrace();} @Override public void onDisconnect() {} @Override public void onConnect() {} }); /// socket.emit("echo", "hello"); btn.setOnClickListener(new OnClickListener() { public void onClick(View arg0) { k=tt.getText().toString(); socket.emit("echo", k); } }); } @Override public boolean onCreateOptionsMenu(Menu menu) { // Inflate the menu; this adds items to the action bar if it is present. getMenuInflater().inflate(R.menu.activity_main, menu); return true; } }
服务器端的错误日志
debug - client authorized info - handshake authorized kaHbMG-lFmuFtvkFGY2W debug - setting request GET /socket.io/1/websocket/kaHbMG-lFmuFtvkFGY2W debug - set heartbeat interval for client kaHbMG-lFmuFtvkFGY2W debug - client authorized for debug - websocket writing 1:: debug - websocket writing 5:::{"name":"echoback","args":["hello"]} debug - emitting heartbeat for client kaHbMG-lFmuFtvkFGY2W debug - websocket writing 2:: debug - set heartbeat timeout for client kaHbMG-lFmuFtvkFGY2W debug - got heartbeat packet debug - cleared heartbeat timeout for client kaHbMG-lFmuFtvkFGY2W debug - set heartbeat interval for client kaHbMG-lFmuFtvkFGY2W debug - websocket writing 5:::{"name":"echoback","args":["this is textbox input text"]} info - transport end (undefined) debug - set close timeout for client kaHbMG-lFmuFtvkFGY2W debug - cleared close timeout for client kaHbMG-lFmuFtvkFGY2W debug - cleared heartbeat interval for client kaHbMG-lFmuFtvkFGY2W debug - discarding transport
我认为你需要明确地configuration套接字 – 从github文档[https://github.com/LearnBoost/Socket.IO/wiki/Configuring-Socket.IO]这个代码 – 其中一个投票选项将使问题去远。
var io = require('socket.io').listen(80); io.configure('production', function(){ io.enable('browser client etag'); io.set('log level', 1); io.set('transports', [ 'websocket' , 'flashsocket' , 'htmlfile' , 'xhr-polling' , 'jsonp-polling' ]); }); io.configure('development', function(){ io.set('transports', ['websocket']); });