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HttpWebResponse接收我的应用程序时，我遇到了这个异常WindowsPhone。我该如何解决这个问题。它经常发生，但我需要确保我的应用程序在发生时不会崩溃。请看一下截图。

我的预期反应是

       Headers:-
       HTTP/1.1 500 Internal Server Error
       Date: Wed, 28 Nov 2012 06:41:24 GMT
       Content-Type: application/json
       Transfer-Encoding: chunked
       Connection: keep-alive
       Keep-Alive: timeout=30
       Set-Cookie: ...........; path=/
       Expires: Thu, 19 Nov 1981 08:52:00 GMT
       Cache-Control: no-store, no-cache, must-revalidate, post-check=0, pre-check=0
       Pragma: no-cache
       Internal Server Error: 

       Json:-
       {"status":0,"error_code":1001,"data":{"msg":"Something went wrong. Please try again later. [error code 1001]"}}

它还在InnerException消息中显示为Specified value has invalid HTTP Header characters. Parameter name: name

请帮忙。我不知道为什么 webRequest.EndGetResponse(asynchronousResult) 无法读取响应。有替代方案吗？

更新 开始请求：

_webRequest.BeginGetRequestStream(new AsyncCallback(GetReqeustStreamCallback), _webRequest);

private void GetReqeustStreamCallback(IAsyncResult asynchronousResult)
    {
        if ((!ReqIdEnabled || Network.RequestUniqueId == this.RequestUniqueId))
        {
            HttpWebRequest webRequest = (HttpWebRequest)asynchronousResult.AsyncState;

            // End the stream request operation

            using (Stream postStream = webRequest.EndGetRequestStream(asynchronousResult))
            {

                // Add the post data to the web request
                postStream.Write(_postDataInBytes, 0, _postDataInBytes.Length);

                //postStream.Dispose();
            }

            // Start the web request
            webRequest.BeginGetResponse(new AsyncCallback(GetResponseCallback), webRequest);
        }
    }

    private void GetResponseCallback(IAsyncResult asynchronousResult)
    {
        HttpWebRequest webRequest = (HttpWebRequest)asynchronousResult.AsyncState;
            try
            {
     //**throws Exception here when my server returns 503/500 and is not caught by the catch block below**
                using (HttpWebResponse response = (HttpWebResponse)webRequest.EndGetResponse(asynchronousResult))  
                {
                    ReadResponse(response);
                }
            }
            catch (WebException ee)
            {
            }
    }
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1 回答 1

0

在您的 catch 块中放置一个断点，并查看较低级别的堆栈，然后查找System.Net.ni.dll!System.Net.WebHeaderCollection.this[string].set(string name, string value).

在局部变量中，您可以看到解析失败的特定值。

对我来说，造成问题的是 Google App Engine 的自定义 User-Agent 标头。

于 2014-03-05T17:34:19.737 回答