Node.js Socket.io无法从客户端连接到服务器

首先，我的server.js端代码是：

var socket  = require( 'socket.io' );
var requestify = require('requestify');
var express = require('express');
var app     = express();
var server  = require('http').createServer(app);
var io      = socket.listen( server );
var port    = process.env.PORT || 3000;

server.listen(port, function () {
 console.log('Server listening at port %d', port);
});

var socket = io.connect( 'http://'+IP_ADDRESS+':3000',          {query:'userId='+userId+'&orgId='+orgId});
 console.log(socket);
 socket.on('connect', function() {
        console.log('check 2', socket.connected);
            // alert(socket.connected);
        });

但是，此服务器代码在分配的端口中运行良好

现在，我的客户端代码是：

var socket  = require( 'socket.io' );
var requestify = require('requestify');
var express = require('express');
var app     = express();
var server  = require('http').createServer(app);
var io      = socket.listen( server );
var port    = process.env.PORT || 3000;

server.listen(port, function () {
 console.log('Server listening at port %d', port);
});

var socket = io.connect( 'http://'+IP_ADDRESS+':3000',          {query:'userId='+userId+'&orgId='+orgId});
 console.log(socket);
 socket.on('connect', function() {
        console.log('check 2', socket.connected);
            // alert(socket.connected);
        });

这在实时服务器上不起作用，但在本地（xampp）服务器上完全起作用。socket.on函数没有响应。在控制台日志上 插座控制台提供：

socket.io-client:url parse http://52.40.237.147:3000 +0ms
2017-03-08 11:20:59.026 socket.io.js:2708 socket.io-client new io 
instance for http://52.40.237.147:3000 +1ms
2017-03-08 11:20:59.030 socket.io.js:2708 socket.io-client:manager
readyState closed +2ms
2017-03-08 11:20:59.030 socket.io.js:2708 socket.io-client:manager 
opening http://52.40.237.147:3000 +3ms
2017-03-08 11:20:59.032 socket.io.js:2708 engine.io-client:socket 
creating transport "polling" +0ms
2017-03-08 11:20:59.034 socket.io.js:2708 engine.io-client:polling 
polling +1ms
2017-03-08 11:20:59.034 socket.io.js:2708 engine.io-client:polling-xhr 
xhr poll +1ms
2017-03-08 11:20:59.036 socket.io.js:2708 engine.io-client:polling-xhr 
xhr open 
GET: http://52.40.237.147:3000/socket.io/?    userId=9&orgId=3&EIO=3&transport=polling&t=LgiQhOy +1ms
2017-03-08 11:20:59.037 socket.io.js:2708 engine.io-client:polling-xhr 
xhr data null +1ms
2017-03-08 11:20:59.039 socket.io.js:2708 engine.io-client:socket 
setting transport polling +3ms
2017-03-08 11:20:59.040 socket.io.js:2708 socket.io-client:manager 
connect attempt will timeout after 20000 +9ms
2017-03-08 11:20:59.041 socket.io.js:2708 socket.io-client:manager 
readyState opening +2ms
2017-03-08 11:20:59.042 (index):1022

---

伙计们，我想不出这个问题。为什么它没有连接到服务器。

解决此问题的通常方法是检查调试器中客户端网络选项卡的详细信息。在那里，您可以确切地看到在网络级别上客户端和服务器之间发生了什么，这通常会为为什么不建立连接提供线索。