Question

我有以下代码使用StreamWriter写入简单RESTfull调用的请求：

    private T GetRestPutResult<T>(string restUri, string payload, Func<StreamReader, T> getResultFunc)
    {
        try
        {
            HttpWebRequest taskListRequest = (HttpWebRequest)ActMgmtWebRequest.Create(restUri);
            taskListRequest.ContentType = ActivitiConstants.HttpRequest.ContentTypeApplicationJson;
            taskListRequest.Method = ActivitiConstants.HttpRequest.MethodPut;
            taskListRequest.Headers.Add("Authorization", "Basic " + serviceCredentials);

            using (var streamWriter = new StreamWriter(taskListRequest.GetRequestStream()))
            {
                streamWriter.Write(payload);

                using (WebResponse svcResponse = (HttpWebResponse)taskListRequest.GetResponse())
                {
                    using (StreamReader sr = new StreamReader(svcResponse.GetResponseStream()))
                    {
                        return getResultFunc(sr); // <-line 171
                    }
                }
            }
        }
        catch (Exception ex)
        {
            throw new Exception(string.Format("The REST service (url: {0}) threw an exception.", restUri), ex);
        }
    }

我收到以下错误，因为返回被命中（它调用getResultFunc，它成功读取响应流，然后返回此方法并抛出此错误：

System.Net.WebException was caught
  HResult=-2146233079
  Message=The request was aborted: The connection was closed unexpectedly.
  Source=System
  StackTrace:
       at System.Net.ConnectStream.InternalWrite(Boolean async, Byte[] buffer, Int32 offset, Int32 size, AsyncCallback callback, Object state)
       at System.Net.ConnectStream.Write(Byte[] buffer, Int32 offset, Int32 size)
       at System.IO.StreamWriter.Flush(Boolean flushStream, Boolean flushEncoder)
       at System.IO.StreamWriter.Dispose(Boolean disposing)
       at System.IO.TextWriter.Dispose()
       at Org.Intermountain.ActMgmt.ActivitiService.ActivitiWorkflowProxy.GetRestPutResult[T](String restUri, String payload, Func`2 getResultFunc) in c:\dev\ActMgmt\trunk\Org.Intermountain.ActMgmt.ActivitiService\ActivitiWorkflowProxy.cs:line 171
  InnerException:

这看起来像编写器上的dispose方法导致了问题。

此时请求实际上已经成功，一切都很顺利。该服务甚至返回JSON响应，我从缓冲区获取它，并在getFuncResult方法中处理响应，该方法成功执行并向此方法返回一个布尔值，但是当我从此方法返回时，我收到此错误。我似乎已经关闭了当我使用streamWriter范围结束时请求已关闭所以当它处理它时会抛出错误。如何避免此错误？

我搜索了这个错误，但大多数评论是基于读者的，在那里找不到这样的东西。

提前致谢

RESTful HTTPWebRequest PUT连接意外关闭

0 个答案: