Node.JS + Socket.io，將套接字事件處理程序移動到外部模塊？

Question

我有一個server.js文件是這樣的：

var express = require('express'), 
    app = express(), 
    server = require('http').createServer(app), 
    mongoose = require('mongoose'), 
    bodyParser = require('body-parser'), 
    apiRouter = require('./app/routes/api.js'), 
    io = require('socket.io')(server), 
    socketEvents = require('./app/modules/socketEvents.js')(io); 

//Clears Node Console. 
process.stdout.write('\033c'); 
console.log('Server starting!'); 

socketEvents.attachEventHandlers(); 

app.use(bodyParser.urlencoded({extended: true})); 
app.use(bodyParser.json()); 

app.use('/api', apiRouter); 
app.use(express.static('public')); 

app.use('*', function(req, res, next) { 
    //All requests return single page angular application. 
    res.sendFile(__dirname + '/public/index.html'); 
}); 

mongoose.connect('localhost', 'triviaattack', function(err) { 
    if (err) { 
     console.log('An error occured when connecting to the MongoDB Database'); 
     throw err; 
    } 
}); 

server.listen(1337); 

而且socketEvents.js

module.exports = function(io) { 

    return { 
     attachEventHandlers: function() { 

      io.on('connection', function(socket) { 

       console.log('client connected'); 

       socket.on('joinMatchMaking', function(data) { 
        //Every time a player joins the matchmaking queue, check if a game can be created. 
        matchMakingQueue.push(data); 
        var matchedPlayers = []; 
        for (i = 0; i < matchMakingQueue.length; i++) { 
         switch (data.gameType) { 
          case '1v1': 
           matchedPlayers.push(matchMakingQueue[i].username); 
           if (matchedPlayers.length == 2) { 
            socket.emit('matchFound', {players: matchedPlayers}); 
           } 
           console.log('user joined 1v1 queue'); 
          case '2v2': 
           matchedPlayers.push(matchMakingQueue[i].username); 
           if (matchedPlayers.length == 4) { 
            socket.emit('matchFound', {players: matchedPlayers}); 
           } 
           console.log('user joined 2v2 queue'); 
         } 
        } 
        console.log(data.username + ' joined the ' + data.gameType + ' matchmaking queue'); 
        console.log('users in queue: ' + matchMakingQueue.length); 
       }); 

       socket.on('leaveMatchMaking', function(username) { 
        matchMakingQueue.splice(matchMakingQueue.indexOf(username), 1); 
        console.log(username + ' left matchmaking queue.'); 
        console.log('users in queue: ' + matchMakingQueue.length); 
       }); 

      }); 

     console.log('events attached'); 

     } 
    } 

}; 

當我打開我的網站在瀏覽器中，io.on（'連接），功能（ ）{...}）事件處理程序沒有被調用，它應該在客戶端連接時輸出一個console.log消息。我想將我的socket.io事件保存在我的主server.js文件之外，因爲它們會有很多，我想將它們分離到它們自己的模塊中。

Answer 1

你需要在html文件中有一些套接字代碼來連接..你可以包括它嗎？

Answer 2

我這樣做餡用我所有的插座事件的中間件：

...然後在socket-events.js類似：

module.exports = function(io) { 
    return function(socket, next) { 
     // do stuff 
     return next(); 
    } 
} 

我要補充一點，在這種情況下， on("connection")偵聽器似乎不是必需的，因爲每個中間件函數都已在每個傳入套接字連接上執行。