NodeJS + Socket.io连接事件处理程序未被成功调用

我在一个名为server.js的文件和index.html中有以下代码

由于某些原因，当我在web浏览器中导航到我的服务器时，io.on('connection')部分没有在其回调中调用console.log方法。

检查下面的代码，它说明了一切。 server.js

var express = require('express'),
    app = express(),
    io = require('socket.io')(app.Server),
    mongoose = require('mongoose'),
    bodyParser = require('body-parser'),
    apiRouter = require('./app/routes/api.js');
//Clears Node Console.
process.stdout.write('33c');
console.log('Server starting!');
app.use(bodyParser.urlencoded({ extended: false }));
app.use(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;
    }
});
io.on('connection', function(socket) {
    console.log('client connected via socket'); //This is the line that isn't being called
});
app.listen(1337, function() {
    console.log('Server started successfully @ ' + Date());
});

index . html

<!DOCTYPE html>
<html ng-app="myApp">
<head>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/angular.js/1.4.4/angular.min.js"></script>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/angular.js/1.4.4/angular-route.min.js"></script>
    <script src="./app/app.js"></script>
    <script src="https://cdn.socket.io/socket.io-1.3.5.js"></script>
    <script>
        var socket = io();
    </script>
</head>
<body>
    <div ng-controller="HomeCtrl">
        {{message}}
    </div>
</body>
</html>

找到答案了

必须将server.js更改为以下内容，注意顶部附近的新http变量。仍然有点好奇，为什么只是通过app.Server不工作在我原来的帖子…哦。

var app = require('express')(),
    http = require('http').Server(app),
    io = require('socket.io')(http),
    mongoose = require('mongoose'),
    bodyParser = require('body-parser'),
    apiRouter = require('./app/routes/api.js');
//Clears Node Console.
process.stdout.write('33c');
console.log('Server starting!');
app.use(bodyParser.urlencoded({ extended: false }));
app.use(apiRouter);
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;
    }
});
io.on('connection', function(socket) {
    console.log('client connected via socket');
});
http.listen(1337, function() {
    console.log('Server started successfully @ ' + Date());
});

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