Nodejs & MongoDB

/* GLOBALS
----------------------------------------------------------------------*/
var rdata = [];

/* SERVER SETTINGS
----------------------------------------------------------------------*/

//load http module to ceate an http server.
var http = require('http');
var url  = require('url');

//configure to respond http server with message
http.createServer(function (request, response) {

    //request name parameter
    var url_parts = url.parse(request.url, true);
    var query = url_parts.query;

    //do the mongo
    var mongo = require('mongodb');
    var db = new mongo.Db('nodedb', new mongo.Server('localhost', 27017, {}), {});

    db.open(function() {

        db.collection('Persons', function(err, collection) {

            var cursor = collection.find(query);

            cursor.each(function(err, doc) {

                if(doc) {

                    rdata.push(doc);

                }

            });

        });

    });

    //write what type of response
    response.writeHead(200, {'Content-Type': 'application/json;charset=utf-8'});

    //close response johan kvint :)
    response.end(JSON.stringify(rdata));

    //clear rdata
    rdata = [];

}).listen(process.env.PORT);