node.js - Socket.io 'on' 返回未定义

Question

好的，所以我正在尝试学习 socket.io，但我收到了这个错误：

io.socket.on('connection', function (socket) TypeError: Cannot call method 'on' of undefined

这是我的代码：

var express = require('express')
  , app = express.createServer()
  , routes = require('./routes')
  , user = require('./routes/user')
  , path = require('path')
  , io = require('socket.io').listen(app);


// all environments
app.set('views', __dirname + '/views');
app.set('view engine', 'jade');
app.use(express.favicon());
app.use(express.logger('dev'));
app.use(express.bodyParser());
app.use(express.methodOverride());
app.use(app.router);
app.use(express.static(path.join(__dirname, 'public')));

app.listen(3000);

app.get('/', routes.index);
app.get('/users', user.list);

io.socket.on('connection', function (socket) {
    socket.emit('news', { hello: 'world' });
    socket.on('my other event', function (data) {
        console.log(data);
    });
});

我知道这将是相当明显的事情。

Answer 1

应该是io.sockets.on（“sockets”而不是“socket”）：

io.sockets.on('connection', function (socket) {
    socket.emit('news', { hello: 'world' });
    socket.on('my other event', function (data) {
        console.log(data);
    });
});

Answer 2

我认为这段代码不再有效。这是我用来处理 socket.io 和 http 服务器的东西。

var app = require('http'),
    io = require('socket.io');

var handler = function(req, res) { /* your handler function*/ };
var server = app.createServer(handler).listen( 8000 );
var ios = io.listen(server);

ios.sockets.on('connection', function(socket){
   socket.emit('message', {'message': 'hello world'});
});