private void _httpServer_UnhandledRequestReceived(object sender, UnhandledRequestReceivedEventArgs args)
        {
            HttpRequestMessage requestMsg = args.Context.Request;

            if (requestMsg.Content is BlockStreamContent streamContent)
            {
                BlockStream stream = streamContent.Stream;
                FileStream  fs     = null;
                try
                {
                    fs = File.Open("d:\\test\\test.exe", FileMode.Create, FileAccess.Write);
                    stream.CopyTo(fs);
                }
                finally
                {
                    if (fs != null)
                    {
                        fs.Close();
                    }
                }

                HttpResponseMessage responseMsg = ResponseMsgHelper.CreateSimpleRepMsg();
                args.Context.Response = responseMsg;
            }
            else if (requestMsg.Content is ByteArrayContent byteContent)
            {
            }
        }