Node.JS + Socket.io，将套接字事件处理程序移动到外部模块？

Question

我有一个server.js文件是这样的：

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'); 

     } 
    } 

}; 

当我打开我的网站在浏览器中，io.on（'连接），功能（ ）{...}）事件处理程序没有被调用，它应该在客户端连接时输出一个console.log消息。我想将我的socket.io事件保存在我的主server.js文件之外，因为它们会有很多，我想将它们分离到它们自己的模块中。

Answer 1

你需要在html文件中有一些套接字代码来连接..你可以包括它吗？

Answer 2

我这样做馅用我所有的插座事件的中间件：

...然后在socket-events.js类似：

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

我要补充一点，在这种情况下， on("connection")侦听器似乎不是必需的，因为每个中间件函数都已在每个传入套接字连接上执行。