Class to work with RequestJson in actionScript

RequestJson.as

package {
	import flash.display.Sprite;
	import flash.events.*;
	import flash.net.*;
	
	public class RequestJson extends Sprite {
		private var loader:URLLoader;
		private var request:URLRequest;
		
		private var _completeHandler:Function;
		public function setCompleteHandler(handler:Function):void
		{
			_completeHandler = handler;	
		}
		
		private var _httpStatusHandler:Function;
		public function addHttpStatusHandler(handler:Function, status:Number):void
		{
			_httpStatusHandler = handler;	
		}
											
		public function RequestJson(url:String, params:*, method:String) 
		{
			loader = new URLLoader();
			
			request= new URLRequest(url);
			request.requestHeaders["Content-Type"] = "aplication/json";
			request.requestHeaders["Accept"] = "aplication/json";
			request.method = method;
			
			if(params) setParams(params);
			
			configureListeners(loader);
		}
		
		public function Go():void
		{
			try {
				loader.load(request);
			} catch (error:Error) {
				trace(error);
			}
		}
		
		private function setParams(params:*):void
		{
			var variables : URLVariables = new URLVariables();  
			for(var key in params) variables[key] = params[key]			
			request.data = variables; 
		}
		
		private function configureListeners(dispatcher:IEventDispatcher):void 
		{
			dispatcher.addEventListener(Event.COMPLETE, completeHandler);
			dispatcher.addEventListener(HTTPStatusEvent.HTTP_STATUS, httpStatusHandler);
		}
		
		private function completeHandler(event:Event):void 
		{
			_completeHandler(URLLoader(event.target).data);
		}
		
		private function httpStatusHandler(event:HTTPStatusEvent):void 
		{
			//TODO: inception(TODO: "colacar uma descricao mais simples que me lembre o que tenho de fazer")
			trace(event);
		}
		
	}
}