Question

我正在使用网络流向服务器发送命令并接收数据。出于某种原因，我没有收到所有数据。我试图在无限循环中保持连接打开，并在下一次迭代中看到接收到的数据。奇怪的是，当我不使用PORT 80网络流表现良好并正确接收数据时。

这是我的接收功能。

    public static string SendRecieveString(string hostname, int port, string message, bool stripHeaderFromRespose = true)
    {
        //Printer.print("TCP Socket: Attempting Connection to server: " + hostname + "@" + port + " with header: " + message, PrintingSeverities.Info);
        //using (WebClient client = new WebClient())
        //{
        //    Printer.print("Send/Recieve communicating with header: " + "http://" + hostname + message + ":" + port, PrintingSeverities.Debug);
        //    string htmlCode = client.DownloadString("http://" + hostname + message + ":" + port);
        //    Printer.print("Raw Page: \n " + htmlCode, PrintingSeverities.Debug);
        //    return htmlCode;
        //}
        #region v1
        try
        {
            string page = String.Empty;
            using (TcpClient clientHandler = new TcpClient(hostname, port))
            {
                if (clientHandler.Connected) { 
                using (NetworkStream clientStream = clientHandler.GetStream())
                {
                    if (!clientStream.CanRead || !clientStream.CanWrite)
                    {
                        Printer.print("TCP Socket: Stream cannont preform read/write", PrintingSeverities.Warning);
                        throw new Exception("TCP Socket: Stream cannont preform read/write");
                    }
                    Byte[] bytes2send = Encoding.ASCII.GetBytes(message);
                    clientStream.Write(bytes2send, 0, bytes2send.Length);
                    do
                    {
                        Byte[] bytesReceived = new Byte[clientHandler.ReceiveBufferSize];
                        int streamReceived = clientStream.Read(bytesReceived, 0, bytesReceived.Length);
                        page += Encoding.ASCII.GetString(bytesReceived, 0, streamReceived);
                        Printer.print("Stream size: " + streamReceived);
                    } while (clientStream.DataAvailable);
                    Printer.print("Raw Page: " + page, PrintingSeverities.Debug);
                }
                if (stripHeaderFromRespose)
                {
                    string HTTPHeaderDelimiter = "\r\n\r\n";
                    if (page.IndexOf("HTTP/1.1 200 OK") > -1)
                        page = page.Substring(page.IndexOf(HTTPHeaderDelimiter) + HTTPHeaderDelimiter.Length);
                }
                }
                else
                {
                    Printer.print("TCP Socket: Could not connect to server", PrintingSeverities.Warning);
                    throw new Exception("TCP Socket: Could not connect to server");
                }
            }
            Printer.print("TCP Socket: Returning Page: " + page, PrintingSeverities.Debug);

            return page;
        }
        catch (Exception ex)
        {
            throw ex;
        }
        #endregion

我收到了这个：原始页面： HTTP / 1.1 200好的缓存控制：无存储内容类型：text / xml 内容长度：399

[结束] - ＆gt;虽然我应该收到：原始页面：

  HTTP/1.1 200 OK 
  Cache-control: no-store 
  Content-type: text/xml 
  Content-length: 399


<?xml version="1.0" encoding="utf-8" ?> <datavalues><relay1state>0</relay1state><relay2state>1</relay2state><reboot1state>0</reboot1state><reboot2state>0</reboot2state><failures1>0</failures1><failures2>0</failures2><rbtAttempts1>0</rbtAttempts1><rbtAttempts2>0</rbtAttempts2><totalreboots1>0</totalreboots1><totalreboots2>0</totalreboots2><serialNumber>00:0C:C8:02:B9:92</serialNumber></datavalues>"

Answer 1

更新＃10！ ：）

看起来另一个主题同意我的评估如下。有关其他信息，请参阅this StackOverFlow帖子。

问题似乎在于您正在检查是否可以从异步源获得数据。（换句话说，答案可能是“不尚未”。）

<强>解决方案：

使用WebClient库为您完成工作：

var webClient = new WebClient（）;
string readHtml = webClient.DownloadString（hostname）;
坚持您原来提出的方法，尝试通过
阅读
- 通过TCPClient类的异步机制。
- StreamReader ReadToEnd（缺少缓冲，因此您不得不将整个数据集拉入预定义的字节数组中。
- 或利用总预期数据集大小来确定您是否已完成，并让线程在缓冲区读取之间休眠。

网络流未收到所有数据

1 个答案: