socket.on('connection' ... 事件从未触发 nodejs + express + socket.io [英] socket.on('connection' ... event never fired nodejs + express + socket.io

问题描述

问题 socket.io 不工作

Problem socket.io NOT working

详情

• 用express [文件夹]生成一个项目；cd [文件夹];npm 安装；
• 设置socket.io npm install socket.io
• 使用以下代码运行节点应用
• 客户端 connect 事件触发，但服务器 connection 从未触发.

• Generated a project with express [folder]; cd [folder]; npm install;
• Setup socket.io npm install socket.io
• Run node app with below code
• Client connect event fires but server connection NEVER fired.

设置

• 服务器AWS 免费套餐，Ubuntu 11.10，ami-a7f539ce
• nodejs v0.6.5
• 快递 v2.5.1
• socket.io v0.8.7

客户

 var socket = io.connect('http://example.com:3000');

 socket.on('connect', function() { 
    console.log('connected');
 });

 socket.on('message', function(msg){
    console.log(msg);
 });

 socket.on('disconnect', function() {
    console.log('disconnected');
 });

 socket.on('error', function (e) {
    console.log('System', e ? e : 'A unknown error occurred');
 });

服务器

 [...]

 app.listen(3000);

 // socket.io setup
 var socket = require('socket.io').listen(app);

 // socket.io connection establishment
 socket.on('connection', function (client) {
    client.send("hello");
    console.log("hello", client);           
 });

为什么 connection 事件从不触发?

Why is connection event never fired?

推荐答案

花了一段时间才注意到... connection 事件是在 io.sockets 上发出的.在您的代码中，这将是

Took a while to notice... the connection event is emmited on io.sockets. In your code this would be

socket.sockets.on('connection', function (client) {
  client.send("hello")
  console.log("hello", client)
})

您应该使用 io 而不是 socket 作为 var 名称以避免这种混淆.

You should use io instead of socket as the var name to avoid this confusion.

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