C#HttpWebRequest忽略HTTP 500错误 [英] C# HttpWebRequest ignore HTTP 500 error

问题描述

我正在尝试使用C#4.0中的WebRequest类下载页面.由于某种原因，此页面可以正确返回所有内容，但是带有HTTP 500内部错误代码.

I'm trying to download a page using the WebRequest class in C#4.0. For some reason this page returns all the content correctly, but with a HTTP 500 internal error code.

Request.EndGetResponse(ar);

当页面返回HTTP 500或404时，此方法将引发WebException.我该如何忽略呢?我知道它返回500，但是我仍然想阅读页面/响应的内容.

When the page returns HTTP 500 or 404, this method throws a WebException. How can I ignore this? I know it returns 500 but I still want to read the contents of the page / response.

推荐答案

通过查看WebExeption公开的响应对象，可以尝试使用try/catch块来捕获异常，并在出现HTTP 404或500错误的情况下进行其他处理.课.

You can a try / catch block to catch the exception and do additional processing in case of http 404 or 500 errors by looking at the response object exposed by the WebExeption class.

try
{
    response = (HttpWebResponse)Request.EndGetResponse(ar);
}
catch (System.Net.WebException ex)
{
    response = (HttpWebResponse)ex.Response;

    switch (response.StatusCode)
    {
        case HttpStatusCode.NotFound: // 404
            break;

        case HttpStatusCode.InternalServerError: // 500
            break;

        default:
            throw;
    }
}

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