Question

我正在实施一个模拟的b / s股票数据系统。我在客户端和服务器端使用flex和c＃。我发现flash有一个安全策略，我在服务器代码中处理了policy-file-request。但似乎它不起作用，因为代码在连接后跳出“socket.Receive（b）”。我尝试在连接处理程序中的客户端上发送消息，在这种情况下，服务器可以接收正确的消息。但是永远不会收到自动生成的“策略文件请求”，客户端无法从服务器发送数据。在这里，我把我的代码片段。

我的ActionScript代码：

public class StockClient extends Sprite {
    private var hostName:String = "192.168.84.103";
    private var port:uint = 55555;
    private var socket:XMLSocket;

    public function StockClient() {
        socket = new XMLSocket();
        configureListeners(socket);
        socket.connect(hostName, port);
    }

    public function send(data:Object) : void{
        socket.send(data);
    }

    private function configureListeners(dispatcher:IEventDispatcher):void {
        dispatcher.addEventListener(Event.CLOSE, closeHandler);
        dispatcher.addEventListener(Event.CONNECT, connectHandler);
        dispatcher.addEventListener(IOErrorEvent.IO_ERROR, ioErrorHandler);
        dispatcher.addEventListener(ProgressEvent.PROGRESS, progressHandler);
        dispatcher.addEventListener(SecurityErrorEvent.SECURITY_ERROR, securityErrorHandler);
dispatcher.addEventListener(ProgressEvent.SOCKET_DATA, dataHandler);
    }

    private function closeHandler(event:Event):void {
        trace("closeHandler: " + event);
    }

    private function connectHandler(event:Event):void {
        trace("connectHandler: " + event);
        //following testing message can be received, but client can't invoke data handler
//send("<policy-file-request/>");
    }

    private function dataHandler(event:ProgressEvent):void {
        //never fired
        trace("dataHandler: " + event);
    }

    private function ioErrorHandler(event:IOErrorEvent):void {
        trace("ioErrorHandler: " + event);
    }

    private function progressHandler(event:ProgressEvent):void {
        trace("progressHandler loaded:" + event.bytesLoaded + " total: " + event.bytesTotal);
    }

    private function securityErrorHandler(event:SecurityErrorEvent):void {
        trace("securityErrorHandler: " + event);
    }
}

我的C＃代码：

    const int PORT_NUMBER = 55555;
    const String BEGIN_REQUEST = "begin";
    const String END_REQUEST = "end";
    const String POLICY_REQUEST = "<policy-file-request/>\u0000";
    const String POLICY_FILE = "<?xml version=\"1.0\"?>\n" +
        "<!DOCTYPE cross-domain-policy SYSTEM \"http://www.adobe.com/xml/dtds/cross-domain-policy.dtd\">\n" +
        "<cross-domain-policy> \n" +
        " <allow-access-from domain=\"*\" to-ports=\"55555\"/> \n" +
        "</cross-domain-policy>\u0000";           
    ................

    private void startListening()
    {
        provider = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
        provider.Bind(new IPEndPoint(IPAddress.Parse("192.168.84.103"), PORT_NUMBER));
        provider.Listen(10);
        isListened = true;

        while (isListened)
        {
            Socket socket = provider.Accept();
            Console.WriteLine("connect!");
            byte[] b = new byte[1024];
            int receiveLength = 0;
            try
            {
                // code jump out at this statement
                receiveLength = socket.Receive(b);
            }
            catch (Exception e)
            {
                Debug.WriteLine(e.ToString());
            }
           String request = System.Text.Encoding.UTF8.GetString(b, 0, receiveLength);

            Console.WriteLine("request:"+request);

            if (request == POLICY_REQUEST)
            {
                socket.Send(Encoding.UTF8.GetBytes(POLICY_FILE));
                Console.WriteLine("response:" + POLICY_FILE);
            }
            else if (request == END_REQUEST)
            {
                Dispose(socket);
            }
            else
            {
                StartSocket(socket); break;
            }
        }
    }

对于长代码很抱歉，请有人帮忙，谢谢百万

Answer 1

这是因为在您尝试加入的端口上未请求套接字策略文件，而是在静态端口843上请求。

您应该收听端口843以提供策略请求。另外，在发送策略文件后立即关闭套接字时遇到了一些问题。在发送策略文件后，套接字似乎应该保持打开状态几秒钟，否则Flash可能会放弃答案。

请注意，通过这种方式，您可以从其他应用程序提供策略文件请求，而不必从主服务器提供。

this documentation中描述了整个内容。

C＃和Flex之间的套接字通信问题

1 个答案: