A demo server showing express and socket.io

server.js

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

app.configure(function(){
        app.use(express.methodOverride());
        app.use(express.bodyParser());
        app.use(app.router);
        
        app.use(express.static(__dirname + '/../Public'));
        app.use(express.errorHandler());
        app.use(express.logger());
});


//A simple action to set the counter
app.get('/sentCounter/set/:count', function(req, res){
    sentCounter = req.params.count;
    res.send('ok');
});

//A simple action to get the current counter value
app.get('/sentCounter/get', function(req, res){

    res.send('sentCounter: ' + sentCounter);
});

//A simple action to broadcast a message to all connected users.
app.get('/message/broadcast/:msg', function(req, res){
    socket.broadcast({sentCounter: sentCounter, message: req.params.msg});
    res.send('ok');
});


app.listen(9099);


var sentCounter = 0; 
var socket = io.listen(app); 
socket.on('connection', function(client){ 
    socket.broadcast({sentCounter: sentCounter, message: 'Another client connected'});
    client.on('message', function(data){
        sentCounter++; 
        socket.broadcast({sentCounter: sentCounter, message: data});
    });
    client.on('disconnect', function(){
    socket.broadcast({sentCounter: sentCounter, message: 'Another client disconnected'});
    });
});



var sender = function() {
    sentCounter++; 
    socket.broadcast({sentCounter:sentCounter, message: 'This is an auto message - msg #'+sentCounter});
    //Call myself again in 20 seconds
    setTimeout(sender, 20000);
}
sender();