AS3:隐藏加载的资源

一开始,我想有一个服务器端脚本,通过传递一个var来加载图像(比如通过PHP),这个var可以被解密,但是有一个动态salt,比如,使用一个不太可能被发现的方法(比如,将salt嵌入整个字符串),但是这会破坏CDN的目的,因为所有请求都会被定位到服务器。

然后我认为通过套接字加载图像将是一个很好的解决方案,但是,我在将二进制图像(在删除响应头之后)转换为位图时遇到了问题。

有没有更好的办法?我知道,现实上是不可能完全阻止内容被链接到(如有人可以截屏的闪光),但我的目标只是采取措施,在我们这边,以防止发生这种事情的本地手段。如有任何想法,我们将不胜感激。下面是套接字代码(删除了不相关的部分),如果这有帮助的话。

package com.std.socket {
    import flash.system.Security;
    import flash.net.Socket;
    import flash.events.*;
    import flash.errors.*;
    import flash.display.Bitmap;
    import flash.display.MovieClip;
    import flash.display.Loader;
    import flash.utils.ByteArray;

    public class SocketRequest {
        private var root:MovieClip;
        private var sock:Socket;
        private var data:ByteArray = new ByteArray();
        private var request:Object = {
            'host': null,
            'port': null,
            'uri': null,
            'callback': null,
            'response_parts': [] };

        public function SocketRequest(root:MovieClip, host:String, port:int, uri:String, callback:Function):void {
            Security.allowDomain('*');
            Security.loadPolicyFile('http://foo.bar/crossdomain.xml');

            this.request.root = root;
            this.request.host = host;
            this.request.port = port;
            this.request.uri = uri;

            this.sock = new Socket();
            this.sock.addEventListener(Event.CONNECT, this.evt_socketConnect);
            this.sock.addEventListener(Event.CLOSE, this.evt_socketClose);
            this.sock.addEventListener(ProgressEvent.SOCKET_DATA, this.evt_socketResponse);
            this.sock.connect(this.request.host, this.request.port);
        }

        private function evt_socketConnect(evt:Event):void {
            // Send the request headers
            this.sock.writeUTFBytes('GET ' + this.request.uri + " HTTP/1.1\n");
            this.sock.writeUTFBytes('Host: ' + this.request.host + ':' + this.request.port + "\n\n");
        }

        private function evt_socketClose(evt:Event):void {
            // Since this is an image, just split on header \r\n and get the last member 
            var response:Array = this.request.response_parts.join('').split("\r\n");
            var body:String = response[response.length - 1];
            var loader = new Loader();
            var ba:ByteArray = new ByteArray();
            var mc:MovieClip = new MovieClip();

            this.data.writeMultiByte(body, 'utf-8');

            loader.loadBytes(this.data);
            mc.addChild(loader);

            // Pass the resulting MovieClip back to the caller
            if(typeof(this.request.callback) == 'function')
                this.request.callback.apply(this.request.root, [mc])
        }

        private function evt_socketResponse(evt:ProgressEvent):void {
            if(!this.sock.bytesAvailable)
                return;
            this.request.response_parts.push(this.sock.readUTFBytes(this.sock.bytesAvailable));
        }
    }
}

在我写作的时候我在想 SocketRequest::evt_socketResponse() ,的 this.sock.readUTFBytes() 比特应该是:

this.request.response_parts.push(this.sock.readBytes(this.data, this.data.length, evt.bytesLoaded));

然后从 this.data