Приложение для рисования: сохранение изображения на сервер

function sendData():void
{
   var loader : URLLoader = new URLLoader;
    var urlreq:URLRequest = new URLRequest("http://[mydomain]/test.php");
    var urlvars: URLVariables = new URLVariables;
    loader.dataFormat = URLLoaderDataFormat.VARIABLES;
    urlreq.method = URLRequestMethod.POST;
    urlvars.name= "sentike"; // Отсылает в переменную name, значение sentike
urlreq.data = urlvars;
loader.addEventListener(Event.COMPLETE, completed); // Событие при успешном запросе
    loader.load(urlreq);
}

private function export():void
{
    var bmd:BitmapData = new BitmapData(600, 290);//Creates a new BitmapData with the board size
 
    bmd.draw(board);//Draws the board MovieClip into a BitmapImage in the BitmapData
 
    var ba:ByteArray = PNGEncoder.encode(bmd); //Creates a ByteArray of the BitmapData, encoded as PNG
 
    var file:FileReference = new FileReference(); //Выбор положения файла? Можно заменить на сервер?
 
    file.addEventListener(Event.COMPLETE, saveSuccessful); //Adds a new listener to listen when the save is complete
 
    file.save(ba, "MyDrawing.png"); //Saves the ByteArray as a PNG
}
 
private function saveSuccessful(e:Event):void
{
    saveDialog = new SaveDialog();// Instantiates a new SaveDialog Class
 
    addChild(saveDialog); //Adds the SaveDialog MovieClip to the Stage
 
    saveDialog.closeBtn.addEventListener(MouseEvent.MOUSE_UP, closeSaveDialog);//Adds a listener to the close button of the dialog
}
 
private function closeSaveDialog(e:MouseEvent):void
{
    removeChild(saveDialog); //Removes the dialog of the Stage
}
 
private function save(e:MouseEvent):void
{
    export(); //Calls the export function to begin the saving process
}