Create XML and save to desktop

/**
 * Copyright sinclairc5 ( http://wonderfl.net/user/sinclairc5 )
 * MIT License ( http://www.opensource.org/licenses/mit-license.php )
 * Downloaded from: http://wonderfl.net/c/hDO2
 */

package
{
    import flash.display.Sprite;
    import flash.events.Event;
    import flash.events.MouseEvent;
    import flash.utils.ByteArray;
    import flash.net.FileReference;
    import flash.text.TextField;
    
/**
 * ...
 * @author Brian Hodge (brian@hodgedev.com)
 */
public class FlashTest extends Sprite 
{
        private var _xml:XML;

        public function FlashTest():void 
        {
                var txt:TextField = new TextField()
                    txt.text = "click to save XML file to desktop";
                    txt.width = 200;
                addChild( txt );
                
                if (stage) init();
                else addEventListener(Event.ADDED_TO_STAGE, init);
        }

        private function init(e:Event = null):void 
        {
                removeEventListener(Event.ADDED_TO_STAGE, init);

                //Calling the save method requires user interaction and Flash Player 10
                stage.addEventListener(MouseEvent.MOUSE_DOWN, _onMouseDown);
        
                _xml= <xml>
                          <test>data</test>
                      </xml>;
        }
        private function _onMouseDown(e:MouseEvent):void
        {
                var ba:ByteArray = new ByteArray();
                ba.writeUTFBytes(_xml);
                
                var fr:FileReference = new FileReference();
                fr.addEventListener(Event.SELECT, _onRefSelect);
                fr.addEventListener(Event.CANCEL, _onRefCancel);

                fr.save(ba, "filename.xml");
        }
        private function _onRefSelect(e:Event):void
        {
                trace('select');
        }
        private function _onRefCancel(e:Event):void
        {
                trace('cancel');
        }
     }
}