Node.js：在app.js中获取不同结构的服务器变量

所以我下载了一个平均堆栈骨架，我正在制作一个电影应用程序来练习我的技能。我想增加一个聊天室，但在服务器端我不知道该怎么办

这是他们通常期望的代码：

var app = express();
var server = app.listen(3000, function(){
    console.log('now listening for requests on port 3000')
});


var io = socket(server);

io.on('connection', function(socket){
    console.log('made socket connection')
});

问题是，我下载的框架以不同的方式启动服务器（我想他们是通过下面的“www”文件来启动的），所以我认为我不能使用它

var server = app.listen(3000, function(){
        console.log('now listening for requests on port 3000')
    });

获取我想输入的服务器变量

var io=套接字（服务器）

在我的情况下，如何获取该服务器变量？我还将在下面发布www文件。我不太明白，但它似乎有一个服务器变量

#!/usr/bin/env node

/**
 * Module dependencies.
 */

var app = require('../app');
var debug = require('debug')('angular2-nodejs:server');
var http = require('http');

/**
 * Get port from environment and store in Express.
 */

var port = normalizePort(process.env.PORT || '3200');
app.set('port', port);

/**
 * Create HTTP server.
 */

var server = http.createServer(app);

/**
 * Listen on provided port, on all network interfaces.
 */

server.listen(port);
server.on('error', onError);
server.on('listening', onListening);

/**
 * Normalize a port into a number, string, or false.
 */

function normalizePort(val) {
  var port = parseInt(val, 10);

  if (isNaN(port)) {
    // named pipe
    return val;
  }

  if (port >= 0) {
    // port number
    return port;
  }

  return false;
}

/**
 * Event listener for HTTP server "error" event.
 */

function onError(error) {
  if (error.syscall !== 'listen') {
    throw error;
  }

  var bind = typeof port === 'string'
    ? 'Pipe ' + port
    : 'Port ' + port;

  // handle specific listen errors with friendly messages
  switch (error.code) {
    case 'EACCES':
      console.error(bind + ' requires elevated privileges');
      process.exit(1);
      break;
    case 'EADDRINUSE':
      console.error(bind + ' is already in use');
      process.exit(1);
      break;
    default:
      throw error;
  }
}

/**
 * Event listener for HTTP server "listening" event.
 */

function onListening() {
  var addr = server.address();
  var bind = typeof addr === 'string'
    ? 'pipe ' + addr
    : 'port ' + addr.port;
  debug('Listening on ' + bind);
}

---

我将试着指出一些您正在寻找的内容以及socket.io代码的起始位置

/* don't add this section
    var app = express();
    var server = app.listen(3000, function(){
        console.log('now listening for requests on port 3000')
    });
*/
//---------------------------------------------------
// equal to the following section of your www file
var app = require('../app');
var debug = require('debug')('angular2-nodejs:server');
var server = http.createServer(app);

/**
 * Listen on provided port, on all network interfaces.
 */

server.listen(port);
server.on('error', onError); // onError function defined below this code
server.on('listening', onListening);// onListening function defined below this code

// put the soket.io code here after server is listening on your port
var io = require('socket.io')(server);// create the socket.io object here and pass the server object

io.on('connection', function(socket){
     console.log('made socket connection')
});

---

先生，你是个英雄。谢谢你帮我解决这个问题。