Node.js Session handling, used @ cacodaemon.de

Session.js

module.exports.Session = function () {
	var getRandom = function () {
		return Math.floor(Math.random() * 1e16).toString(36);
	}
	
	this.sessionId = getRandom() + '-' + new Date().getTime().toString(36) + '-' + getRandom();
	this.doDestroy = false;

	this.toString = function () {
		return this.sessionId;
	} 

	this.getTime = function () {
		return parseInt(this.sessionId.split('-')[1], 36);
	} 
}

SessionHandler.js

var Session = require('./Session.js').Session

module.exports.SessionHandler = function (cookieName, maxAge, checkInterval) {
	var cookieName = cookieName ? cookieName : 'SESSION';
	var maxAge = maxAge ? maxAge * 1000 : 600000; //10 minutes
	var checkInterval = checkInterval ? checkInterval : 1000; //default 1 sec.
	var sessions = new Array();

	this.forEachSession = function (callback) {
		for (var key in sessions) { 
			callback(sessions[key]);
		}
	}

	this.deleteSession = function (session) {
		if (sessions[session]) {
			delete sessions[session];
			return true;
		}
		return false;
	}

	this.getSession = function (request, response) {
		var cookie = request.headers.cookie;
		if (cookie && cookie.indexOf(cookieName) !== -1) { //cookie found
			var start = cookie.indexOf(cookieName) + cookieName.length + 1;
			var end = cookie.indexOf('; ', start);
			end = end === -1 ? cookie.length : end;
			var value = cookie.substring(start, end);

			if (sessions[value]) {
				return sessions[value];
			}
		}

		var session = new Session();
		response.setHeader('Set-Cookie', [cookieName + '=' + session + ';Max-Age=' + maxAge / 1000]);
		return sessions[session] = session;
	}

	//garbage collection
	setInterval(function () {
		var now = new Date().getTime();
		for (var key in sessions) {
			var session = sessions[key];

			if (session.doDestroy) {
				delete sessions[key];
			}

			if (now - session.getTime() > maxAge) {
				delete sessions[key];
			}
		}
	}, checkInterval);
}

TestSessionHandler.js

var http = require('http');
var url = require("url");
var SessionHandler = require('./SessionHandler.js').SessionHandler;
var sessionHandler = new SessionHandler();

http.createServer(function (request, response) {
    var query = url.parse(request.url, true).query;
    var session = sessionHandler.getSession(request, response);

    if (!session.name && query.name) {
        session.name = query.name;
    }

    response.writeHead(200, {'Content-Type': 'text/html'});
    if (session.name) {
        response.end('<h1>Hello ' + session.name + '!</h1>');
    }
    else {
        response.end('<h1>Who are you?</h1>');
    }
}).listen(8080);