c# - 有谁知道为什么我会收到 HttpWebRequest 超时？

Question

我想知道您是否可以帮助我解决我遇到的一个错误。我有一个我创建的 HTTP 管理器，它可以帮助我处理来自网站的 POSTing/GETing 数据。直到最近我尝试混合使用两者时，它一直运行良好。第一个循环一切正常，在第二个循环中它卡在 HttpWebRequest.GetRequestStream() 上。我已经在网上阅读了所有内容，但没有找到真正的解决方案。以下是获取/接收的代码块:

 ASCIIEncoding encoding = new ASCIIEncoding();
 byte[] buffer = encoding.GetBytes(_PostData);

_HttpWebRequest = (HttpWebRequest)WebRequest.Create(_FetchUrl);
_HttpWebRequest.Credentials = _Credentials;
_HttpWebRequest.Method = _RequestType.ToString();
_HttpWebRequest.ContentType = "application/x-www-form-urlencoded";
_HttpWebRequest.ContentLength = buffer.Length;
_HttpWebRequest.UserAgent = userAgent;
_HttpWebRequest.CookieContainer = _CookieContainer;
_HttpWebRequest.KeepAlive = false;
_HttpWebRequest.AllowAutoRedirect = _AllowAutoRedirect;
_HttpWebRequest.AutomaticDecompression = DecompressionMethods.GZip;
_HttpWebRequest.ServicePoint.Expect100Continue = false;  

 if (_RequestType.Equals(RequestTypes.POST))
{
     // Write POST
 Stream reqStream = _HttpWebRequest.GetRequestStream();
 {
  reqStream.Write(buffer, 0, buffer.Length);
  reqStream.Flush();
  reqStream.Close();
    }
}

以及响应:

HttpWebResponse httpWebResponse = (HttpWebResponse)_HttpWebRequest.GetResponse();
{
  Stream responseStream = httpWebResponse.GetResponseStream();
  {
    if (_UseGzip)
    {
      if (httpWebResponse.ContentEncoding.ToLower().Contains("gzip"))
      {
        responseStream = new GZipStream(responseStream, CompressionMode.Decompress);
      }
      else
      {
        responseStream = new DeflateStream(responseStream, CompressionMode.Decompress);
      }
    }

    if (responseStream != null)
    {
      StreamReader streamReader = new StreamReader(responseStream);
      {
        try
        {
          _PageContent = streamReader.ReadToEnd();
        }
        finally
        {
          streamReader.Close();
          responseStream.Close();
          httpWebResponse.Close();
        }
      }
    }
    else
    {
      _PageContent = string.Empty;
    }
  }
}
_HttpWebRequest.Abort();

谁能看出我的代码挂起的原因的任何缺陷？所有流都已关闭，我已将允许的连接设置为 100 多个，我不明白为什么会中断。

Answer 1

这可能是因为您没有处理 WebResponse 或流或 StreamReader:

var request = WebRequest.Create(...);
using (var response = request.GetResponse())
{
    using (var responseStream = response.GetResponseStream())
    {
        using (var reader = new StreamReader(responseStream))
        {
            // use the reader
        }
    }
}