NodeJS + socket.io:简单的客户端/服务器示例无法正常工作

时间:2011-06-20 12:23:34

标签: javascript node.js comet socket.io

我正在使用NodeJS v0.4.8和

的最新版本的socket.io.
  

npm install socket.io

在Ubuntu上:

  

Linux mars 2.6.38-8-generic#42-Ubuntu SMP Mon Apr 11 03:31:50 UTC 2011 i686 i686 i386 GNU / Linux

遗憾的是,以下代码不会在客户端或服务器端产生任何输出。

有人有线索吗?

服务器端

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

respcont = fs.readFileSync('testclient.js');

server = http.createServer(function(req, res){
    res.writeHead(200, {'Content-Type': 'text/html'}); 
    res.end(respcont);
});
server.listen(8082);

var socket = io.listen(server); 
socket.on('connection', function(client){ 

    sys.puts("New client is here!");
    client.send("hello world");

    client.on('message', function(msg) { sys.puts("client has sent:"+msg); }) ;
    client.on('disconnect', function() { sys.puts("Client has disconnected"); }) ;
}); 

客户端

<html>
<body>
<script type="text/javascript" src="http://localhost:8082/socket.io/socket.io.js"></script>
<script> 
    var socket = new io.Socket(null,{port:8082,rememberTransport:true,timeout:1500});
    socket.connect();
    socket.on('connect', function() { 
        console.log('connected to server'); 
        socket.send('Hi Server...'); 
    });

    socket.on('message', function() { 
        console.log('received a message!');
    });

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

</script> 
</body>
</html>

NodeJS的输出(不是sys.puts(“...”)调用)是:

  

info - socket.io开始调试 -   服务静态/socket.io.js调试 -   客户授权信息 - 握手   授权信息 - 握手   b61a5c2751c1c8c8493db4b79d19e779

3 个答案:

答案 0 :(得分:4)

Express 3.0 + Socket.io工作示例

服务器(app.js)

var express = require('express');
    var app = express.createServer();
    var socket = require('socket.io');
    app.configure(function(){
        app.use(express.static(__dirname + '/'));
    });
    var server = app.listen(8081);
    var io = socket.listen(server);
    io.sockets.on('connection', function (socket) {
        console.log("connnect");
        socket.on('disconnect', function (socket) {
        console.log("disconnect");
     });
}); 

client(index.html)

<script src="/socket.io/socket.io.js"></script>
<script>
    var socket = io.connect('http://localhost:8081');
</script>

您可以使用以下链接分叉代码 https://github.com/sreekumar-kr/Expree3.0---Socket.IO

答案 1 :(得分:3)

我也(像Derrish)喜欢使用express框架来简化我的工作( AWESOME:))。您可以从http://dl.dropbox.com/u/314941/socketio.zip下载并提取此示例。我相信你甚至不必安装这些模块,因为我已经在本地捆绑了它们(只是运行),这要归功于npm :)。

如何安装:

alfred@alfred-laptop:~/tmp/socketio$ uname -a
Linux alfred-laptop 2.6.35-28-generic #50-Ubuntu SMP Fri Mar 18 19:00:26 UTC 2011 i686 GNU/Linux
alfred@alfred-laptop:~/tmp$ wget http://dl.dropbox.com/u/314941/socketio.zip
alfred@alfred-laptop:~/tmp$ unzip socketio.zip
alfred@alfred-laptop:~/tmp$ cd socketio/
alfred@alfred-laptop:~/tmp/socketio$ node -v
v0.4.7
alfred@alfred-laptop:~/tmp/socketio$ npm -v
1.0.6
alfred@alfred-laptop:~/tmp/socketio$ node app.js

代码:

<强> app.js:

// npm install express
// npm install socket.io

var sys         = require('sys'),
        express = require('express'),
        app         = express.createServer('127.0.0.1'),
        io          = require('socket.io'); 

app.use(express.static(__dirname + '/public'));

app.get('/', function (req, res) {
    res.send('Hello World');
});

app.listen(3000);

var socket = io.listen(app); 

socket.on('connection', function (client){ 
  // new client is here!
  setTimeout(function () {
        client.send('Waited two seconds!');
    }, 2000);

  client.on('message', function () {
  }) ;

  client.on('disconnect', function () {
  });
});

公开/ index.html中:

<html>
<p id="text">socket.io</p>

<script src="socket.io/socket.io.js"></script> 
<script src="jquery-1.6.1.min.js"></script><!-- Downloaded Jquery -->

<script> 
    $(document).ready(function(){

        var socket  = new io.Socket(),
                text        = $('#text');

        socket.connect();

        socket.on('connect', function () {
            text.html('connected');
        });

        socket.on('message', function (msg) {
            text.html(msg);
        });

        socket.on('disconnect', function () {
            text.html('disconnected');
        });

    });
</script> 

我的模块列表:

alfred@alfred-laptop:~/tmp/socketio$ npm ls
/home/alfred/tmp/socketio
├─┬ express@2.3.11 
│ ├── connect@1.4.6 
│ ├── mime@1.2.2 
│ └── qs@0.1.0 
└── socket.io@0.6.18

已安装的模块(非必要):

npm install express
npm install socket.io

浏览器将显示:

  1. socket.io一开始,但可能你看不到这个,因为它会被connected取代。
  2. connected当用户连接到socket.io。
  3. 2秒后,它会显示Waited two seconds! image

答案 2 :(得分:1)

我拿了你的例子并使用express将它放在一个节点应用程序中。您的HTML代码放在公共的静态HTML文件中。你的例子工作正常。代码如下所示。我想确保正确提供socket.io脚本文件和HTML文件。

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

var app = module.exports = express.createServer();

// Configuration

app.configure(function(){
  app.set('views', __dirname + '/views');
  app.set('view engine', 'jade');
  app.use(express.bodyParser());
  app.use(express.methodOverride());
  app.use(app.router);
  app.use(express.static(__dirname + '/public'));
});

if (!module.parent) {
  app.listen(9000);
  console.log("server started at %s", (new Date()).toUTCString());
  console.log("listening on port %d", app.address().port);
}


// socket.io 
var socket = io.listen(app); 
socket.on('connection', function(client){ 
    console.log("New client is here!");
    client.send("hello world");
    client.on('message', function(msg){ console.log("client has sent:"+msg); }) ;
    client.on('disconnect', function(){ console.log("Client has disconnected"); }) ;
    client.on('disconnect', function(){ }) 
 });