Web Socket simple node

socket.js

//npm install socket.io --save
// socket.js

var socket = require('socket.io'),
    http = require('http'),
    server = http.createServer(),
    socket = socket.listen(server);

socket.on('connection', function(connection) {
    console.log('User Connected');
    connection.on('message', function(msg){
        socket.emit('message', msg);
    });
});

server.listen(3000, function(){
    console.log('Server started');
});

// node socket.js para correr la aplicacion