有没有一种方法可以确定在WebRequest期间是否发生了重定向? [英] Is there a way to determine if a redirect occurrs during a WebRequest?

问题描述

我正在使用HttpWebRequest刮取Wikipedia.org.很多时候，页面上的主题链接会被合并，因此它们会将您重定向到正确的页面.

I'm using HttpWebRequest to scrape Wikipedia.org. A lot of times there will be links to topics on a page that have been consolidated and therefore they redirect you to the correct page.

例如

http://en.wikipedia.org/wiki/Polish_prisoners_of_war_in_Soviet_Union_(after_1939)

将您重定向到正确的主题

redirects you to the correct topic which is

http://en.wikipedia.org/wiki/Polish_prisoners_of_war_in_the_Soviet_Union_(after_1939) a>

http://en.wikipedia.org/wiki/Polish_prisoners_of_war_in_the_Soviet_Union_(after_1939)

请注意添加了"the"一词.

Notice the addition of the word "the".

这时我需要确定是否发生了重定向.谁能建议我该怎么做?

I need to determine at this point whether or not a redirect has happened. Can anyone suggest how I might do this?

谢谢！

更新

我在下面将回答标记为已回答，因为从技术上讲，这是告诉您是否已重定向的方式.我遇到的问题是Wikipedia实际上没有使用http响应代码3xx进行硬重定向.他们正在执行软重定向，该服务会在同一网址下提供不同的内容.我将不得不找到另一种解决方案.

I marked the response below as answered because technically that is how you tell if you have been redirected. The problem I am having is the Wikipedia is not actually doing a hard redirect with http response codes 3xx. They are doing soft redirects which serves up different content under the same Url. I'll have to find another solution.

推荐答案

尝试一下:

if(reponse.ResponseUri != request.RequestUri) {
    //You were redirected
}

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