package

{

    import flash.display.Loader;

    import flash.display.Sprite;

    import flash.display.StageAlign;

    import flash.events.ContextMenuEvent;

    import flash.events.Event;

    import flash.net.URLRequest;

    import flash.net.URLStream;

    import flash.ui.ContextMenu;

    import flash.ui.ContextMenuItem;

    import flash.utils.ByteArray;

    import flash.utils.getTimer;

    public class Main extends Sprite

    {

        private var _loader:Loader = new Loader();

        private var _urlstream:URLStream = new URLStream();

        private var _data:ByteArray = new ByteArray();

        public function Main():void

        {

            var loadmenu:ContextMenuItem = new ContextMenuItem("Load image");

            loadmenu.addEventListener(ContextMenuEvent.MENU_ITEM_SELECT, this.onLoadImage, false);

            this.contextMenu = new ContextMenu();

            this.contextMenu.customItems.push(loadmenu);

            _urlstream.addEventListener('progress', processData);

            _urlstream.addEventListener('complete', processData);

            addChild(_loader);

            stage.align = StageAlign.TOP_LEFT;

        }

        public function onLoadImage(e:Event):void

        {

            _loader.unload();

            _data.length = 0;

            var url:String = "http://files.cnblogs.com/Greatest/test.jpg.zip";

            _urlstream.load(new URLRequest(url + "?q=" + getTimer()))

        }

        public function processData(e:Event):void

        {

            var oldlen:int = _data.length;

            _urlstream.readBytes(_data, _data.length);

            if (_data.length > oldlen)

            {

                _loader.loadBytes(_data);

            }

        }

    }

}