drupal services over json

Ti_xhr.js

var url = 'http://drupalcon.tut2tech.com/services/json';



var datos = {method: 'user.get',uid:1};
var data = {}; 


var xhr = Titanium.Network.createHTTPClient();
xhr.onload = function(){
  data = JSON.parse(this.responseText);
  Ti.API.info(data);
}
xhr.onerror = function(e){
  Ti.API.info(e.error);
  Ti.API.info('xhr error');
}
xhr.open('POST',url);
xhr.send({data: JSON.stringify(datos)});