Node.js Socket Server

gistfile1.js

net.createServer(
	function(sock) {
	console.log("Received connection from " + sock.remoteAddress + ':' + sock.remotePort);
	sock.on('data', function(data){
		string  = data.toString('ascii')
		setTimeout(function(){
			sock.write(data.slice(0, 20));
		}, 3000);
	});
	sock.on('close', function(data){
		console.log('Closed ' + sock.remoteAddress + ' ' + sock.remotePort);
	});
}).listen(port, host);