1 package 
 2 {
 3     import flash.display.Loader;
 4     import flash.display.Sprite;
 5     import flash.display.StageAlign;
 6     import flash.events.ContextMenuEvent;
 7     import flash.events.Event;
 8     import flash.net.URLRequest;
 9     import flash.net.URLStream;
10     import flash.ui.ContextMenu;
11     import flash.ui.ContextMenuItem;
12     import flash.utils.ByteArray;
13     import flash.utils.getTimer;
14     public class Main extends Sprite 
15     {
16         private var _loader:Loader = new Loader();
17         private var _urlstream:URLStream = new URLStream();
18         private var _data:ByteArray = new ByteArray();
19         public function Main():void 
20         {
21             var loadmenu:ContextMenuItem = new ContextMenuItem("Load image");
22             loadmenu.addEventListener(ContextMenuEvent.MENU_ITEM_SELECT, this.onLoadImage, false);
23             this.contextMenu = new ContextMenu();
24             this.contextMenu.customItems.push(loadmenu);
25             
26             _urlstream.addEventListener('progress', processData);
27             _urlstream.addEventListener('complete', processData);
28             
29             addChild(_loader);
30             
31             stage.align = StageAlign.TOP_LEFT;
32         }
33         public function onLoadImage(e:Event):void
34         {
35             _loader.unload();
36             _data.length = 0;
37             var url:String = "http://files.cnblogs.com/Greatest/test.jpg.zip";
38             _urlstream.load(new URLRequest(url + "?q=" + getTimer()))
39         }
40         public function processData(e:Event):void
41         {
42             var oldlen:int = _data.length;
43             _urlstream.readBytes(_data, _data.length);
44             if (_data.length > oldlen)
45             {
46                 _loader.loadBytes(_data);
47             }
48         }
49     }
50 }