0

我有一个基本的异步套接字服务器。最近，我遇到了间歇性时期，其中一个连接在 TCP 对等方的回复中出现以下错误：

Exception message:
The output char buffer is too small to contain the decoded characters, encoding 'Unicode (UTF-8)' fallback 'System.Text.DecoderReplacementFallback'.

Exception stacktrace:
at System.Text.Encoding.ThrowCharsOverflow()
   at System.Text.Encoding.ThrowCharsOverflow(DecoderNLS decoder, Boolean nothingDecoded)
   at System.Text.UTF8Encoding.GetChars(Byte* bytes, Int32 byteCount, Char* chars, Int32 charCount, DecoderNLS baseDecoder)
   at System.Text.DecoderNLS.GetChars(Byte* bytes, Int32 byteCount, Char* chars, Int32 charCount, Boolean flush)
   at System.Text.DecoderNLS.GetChars(Byte[] bytes, Int32 byteIndex, Int32 byteCount, Char[] chars, Int32 charIndex, Boolean flush)
   at System.Text.DecoderNLS.GetChars(Byte[] bytes, Int32 byteIndex, Int32 byteCount, Char[] chars, Int32 charIndex)
   at System.IO.StreamReader.ReadBuffer()
   at System.IO.StreamReader.ReadLine()
   at MyServer.TcpReceiveMessages()

我怀疑流量在特定的网络路由上受到破坏（其他 TcpListener 和应用程序/网络中其他地方的对等方始终保持 100% 正常通信）。可以采取哪些步骤来更好地查明并修复它？

（注意，我已经完成了数据包捕获，导致异常的传入数据包处理看起来很好，即有效负载似乎包含我想要的文本。我说看是因为有效负载的可识别部分应该在那里，但是也有一些二进制部分在被损坏时不会立即显现出来。）

监听器的简化版本：

private void TcpReceiveMessages()
{
   TcpClient tcpServer = new TcpClient();
   string address = "some_address";
   int port = 80;
   tcpServer.Connect(address, port);
   StreamReader srReceiver = new StreamReader(tcpServer.GetStream());

   StringBuilder wholeMsg = new StringBuilder();
   string partialMsg = "";

   while (tcpServer.Connected)
   {
      try
      {
         //Save a partial portion of the reply:
         partialMsg = srReceiver.ReadLine();

         //Reply complete:
         if ( partialMsg != null && partialMsg == "")
         {
            response = wholeMsg.ToString() + partialMsg;

            //Misc response processing code.
         }
      }
      catch (Exception ex)
      {
         //Do logging that leads to the above exception message/stacktrace
      }
   }
}
4

0 回答 0