本文介绍了HttpWebRequest.GetResponse对HTTP 304抛出WebException的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
当Web服务器响应 HttpWebRequest.GetResponse()
用HTTP 304(未修改),的GetResponse()
thows一个 WebException
,这实在是太令人不可思议了我。这是通过设计还是我缺少明显的东西在这里?
When a web server responds to HttpWebRequest.GetResponse()
with HTTP 304 (Not Modified), GetResponse()
thows a WebException
, which is so very weird to me. Is this by design or am I missing something obvious here?
推荐答案
好了,这似乎是一个被设计的行为和的。这可以用此来解决:
Ok, this seems to be a by-design behavior and a perfect example of a vexing exception. This can be solved with this:
public static HttpWebResponse GetHttpResponse(this HttpWebRequest request)
{
try
{
return (HttpWebResponse) request.GetResponse();
}
catch (WebException ex)
{
if(ex.Response == null || ex.Status != WebExceptionStatus.ProtocolError)
throw;
return (HttpWebResponse)ex.Response;
}
}
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