Sending parameter along URL actionscript - apache-flex

Question

As part of a mobile app I'm building I have to authenticate trough the API of Last.FM.
As documented on their website I tried to format to url correctly but appearently I'm doing something wrong because I get error:
Error #2044: Unhandled ioError:. text=Error #2032: Stream Error. URL: https://ws.audioscrobbler.com/2.0/?method=auth.getMobileSession
Last.FM documentation: http://www.last.fm/api/mobileauth
My code below:
var username:String = "xxxxxxx";
var password:String = "xxxxxxxxxxxx";
var api_key:String = "xxxxxxxxxxxxxxxxxxxxxxxxxx";
var secret:String = "xxxxxxxxxxxxxxxxxxxxxx";
var api_sig:String = MD5.hash( "api_key" + api_key + "methodauth.getMobileSessionpassword" + password + "username" + secret);
var request:URLRequest = new URLRequest("https://ws.audioscrobbler.com/2.0/?method=auth.getMobileSession");
var variables:URLVariables = new URLVariables();//create a variable container
variables.username =username;
variables.password = password;
variables.api_key = api_key;
variables.api_sig = api_sig;
request.data = variables;
request.method = URLRequestMethod.POST;//select the method as post/
var loader:URLLoader = new URLLoader();
loader.addEventListener(Event.COMPLETE, handleComplete);
loader.load(request);//send the request with URLLoader()
Does someone know the answer?

Answer 1

Try to use HTTPService instead of URLLoader. Smth like this:
var http:HTTPService = new HTTPService();
http.useProxy = false;
http.resultFormat = "e4x";
http.method = "POST";
http.url = "https://ws.audioscrobbler.com/2.0/?method=auth.getMobileSession";
var variables:Object = {};
variables.username = username;
variables.password = password;
variables.api_key = api_key;
variables.api_sig = api_sig;
var token:AsyncToken = http.send(variables);
var responder:Responder = new Responder(handleRequestComplete, handleError);
token.addResponder(responder);
Where handleRequestComplete and handleError are your handlers for the request results:
private function handleRequestComplete(event:ResultEvent):void
{
// your code here
}
private function handleError(event:FaultEvent):void
{
// your code here
}