无法从传输连接读取数据：现有连接被远程主机强制关闭

Question

当我通过 HTTP 传输大约 50Mb 的文件时有时，我会收到此错误：

无法从传输连接读取数据：现有连接被远程主机强制关闭。

最重要的是，我在 http://stackoverflow.com 下找不到任何解决方案。

有什么线索我需要改进/改变吗？

应用程序配置：

 <bindings>
      <basicHttpBinding>
        <binding name="BasicHttpBinding_MyDomainServicesoap" closeTimeout="00:03:00" openTimeout="00:04:00" receiveTimeout="00:10:00" sendTimeout="00:05:00" allowCookies="false" bypassProxyOnLocal="false" hostNameComparisonMode="StrongWildcard" maxBufferSize="50000000" maxBufferPoolSize="50000000" maxReceivedMessageSize="50000000" messageEncoding="Text" textEncoding="utf-8" transferMode="Buffered" useDefaultWebProxy="true">
          <readerQuotas maxDepth="64" maxStringContentLength="16384" maxArrayLength="32768" maxBytesPerRead="8192" maxNameTableCharCount="16384"/>
          <security mode="None">
            <transport clientCredentialType="None" proxyCredentialType="None" realm=""/>
            <message clientCredentialType="UserName" algorithmSuite="Default"/>
          </security>
        </binding>
        <binding name="BasicHttpBinding_MyAuthenticationDomainServicesoap" closeTimeout="00:03:00" openTimeout="00:04:00" receiveTimeout="00:10:00" sendTimeout="00:05:00" allowCookies="false" bypassProxyOnLocal="false" hostNameComparisonMode="StrongWildcard" maxBufferSize="50000000" maxBufferPoolSize="50000000" maxReceivedMessageSize="50000000" messageEncoding="Text" textEncoding="utf-8" transferMode="Buffered" useDefaultWebProxy="true">
          <readerQuotas maxDepth="64" maxStringContentLength="16384" maxArrayLength="32768" maxBytesPerRead="8192" maxNameTableCharCount="16384"/>
          <security mode="None">
            <transport clientCredentialType="None" proxyCredentialType="None" realm=""/>
            <message clientCredentialType="UserName" algorithmSuite="Default"/>
          </security>
        </binding>
      </basicHttpBinding>
    </bindings>

代码：

private void FinishWebRequest(IAsyncResult result)
        {
            // Assign values to these objects here so that they can be referenced in the finally block
            Stream remoteStream = null;
            Stream localStream = null;
            WebResponse response = null;

            try
            {
                response = request.EndGetResponse(result);

              if (response != null)
                {
                    // Once the WebResponse object has been retrieved, get the stream object associated with the response's data
                    remoteStream = response.GetResponseStream();

                    // Create the local file
                    string pathToSaveFile = Path.Combine(FileManager.GetFolderContent(), FileView.Filename);
                    localStream = File.Create(pathToSaveFile);

                    WinAPI.SYSTEM_INFO sysinfo = new WinAPI.SYSTEM_INFO();
                    WinAPI.GetSystemInfo(ref sysinfo);

                    // Allocate a buffer 
                    byte[] buffer = new byte[int.Parse(sysinfo.dwPageSize.ToString())];     
                    int bytesRead;

                    // Simple do/while loop to read from stream until no bytes are returned
                    do
                    {
                        // Read data (up to 1k) from the stream
                        bytesRead = remoteStream.Read(buffer, 0, buffer.Length);

                        // Write the data to the local file
                        localStream.Write(buffer, 0, bytesRead);

                        // Increment total bytes processed
                        BytesProcessed += bytesRead;
                    } while (bytesRead > 0);

                    FileView.Downloaded = DateTime.Now;

                    if (BytesProcessed > 0)
                    {
                        FileView.IsSuccess = true;
                        FileView.IsDownloading = false;
                    }
                    else
                    {
                        FileView.IsSuccess = false;
                        FileView.IsDownloading = false;
                    }
                } 
            }
            catch (Exception ex)
            {
                #region Error
                LogEntry l = new LogEntry();
                l.Message = string.Format("{0}", ex.Message);
                l.Title = "FinishWebRequest() Error";
                l.Categories.Add(Category.General);
                l.Priority = Priority.Highest;

                if (ex.InnerException != null) l.ExtendedProperties.Add("InnerException", ex.InnerException.Message);

                CustomLogger.CustomLogger.WriteErrorLog(l);
                #endregion
            }
            finally
            {
                // Close the response and streams objects here to make sure they're closed even if an exception is thrown at some point
                if (response != null) response.Close();
                if (remoteStream != null) remoteStream.Close();
                if (localStream != null) localStream.Close();
            }
        }

Answer 1

我不确定这是否是所有情况的解决方案。

但是，当我将下载大文件的服务器并行连接数量从 3 个减少到 2 个时，就没有错误了。

（早期我使用3个并联连接。）

Answer 2

我遇到了类似的问题，并通过在 web.config 中添加行为部分来解决该问题，该部分告诉数据协定序列化程序覆盖默认的 64kb 大小限制。

<behaviors>
  <endpointBehaviors>
    <behavior>
      <dataContractSerializer maxItemsInObjectGraph="2147483647"/>
    </behavior>
  </endpointBehaviors>
</behaviors>

另外，添加配置后，我开始在客户端收到相同问题的错误，您需要将此配置添加到服务和客户端。