node.js demo chat

app.js

/**
 * node.js demo chat server (app.js)
**/

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

var port = 13902;

var server = http.createServer(function(req, res){
	res.writeHead(301, {
		'Content-Type': 'text/html',
		'Location': 'http://node.demo.r2.ag/chat/',
	});
	res.end('node.js demo chat server');
});

server.listen(port);
console.log('node.js/socket.io server listening on port %d', port);

var data = {
	count : 0,
	total : 0,
	maxi  : 0,
	nick  : 'node',
	mess  : 'hello world',
	time  : '00:00:00'
};

var socket = io.listen(server);
socket.on('connection', function(client){
	data.count++;//接続数+1
	data.total++;//累計+1
	if(data.maxi < data.count) data.maxi = data.count;//最大値保存
	
	client.broadcast(JSON.stringify(data));
	client.send(JSON.stringify(data));
	
	client.on('message', function(message){
		var obj = JSON.parse(message);//送られてきたメッセージをパース
		
		var d = new Date();//時間取得
		
		data.nick = obj.nick;
		data.mess = obj.mess;
		data.time = zero(d.getHours(), 2) + ':' + zero(d.getMinutes(), 2) + ':' + zero(d.getSeconds(), 2);
		
		client.broadcast(JSON.stringify(data));
		client.send(JSON.stringify(data));
		
		console.log('[message]' + data.time + '<' + data.nick + '>' + data.mess);
	});
	
	client.on('disconnect', function(){
		data.count--;
		client.broadcast(JSON.stringify(data));
		
	});
	
	console.log('[status]' + data.count + 'online/' + data.total + 'total/' + data.maxi + 'max');
});

//ぜろつけるやつ
var zero = function(pNumber, pDigit){
	var num = '' + pNumber;
	while(num.length < pDigit){
		num = '0' + num;
	}
	return num;
};