在代码中提取URL [英] extracting url in the code

问题描述

嗨
我有以下读取网页的代码

Hi
I have following code that reads a webpage

 using (Stream stream = request.GetResponse().GetResponseStream())
{
  StreamReader sr = new StreamReader(stream);
  htmlpage= sr.ReadToEnd();
  sr.Close();
}

一旦获得该网页，我将尝试提取我的网站网址，以确保它们被正确转发.
我的问题是，当我获得url时，有些结果很好，而有些在URL的开头和结尾都有多余的代码，例如

(Javascrip:xyw(''http://www.mysite.com/xyzpage.html'')
我试图摆脱url开头和结尾的所有内容，所以我最终得到了
http://www.mysite.com/xyzpage.html
我尝试了以下操作，但这根本不起作用

once i get the webpage I am trying to get my website urls extracted to make sure they are correctly being forwarded.
My problem is when i get url out, some come out fine while some have extra code infront and end of the url for example

(Javascrip:xyw(''http://www.mysite.com/xyzpage.html'')
I am trying to get rid of anything infront of and at the end of url so i end up with
http://www.mysite.com/xyzpage.html
I tried following, which doesnt work at all

string value = Regex.Match(str, @"\((\w+)\)").Groups[1].Value);

任何想法，因为我不擅长如何写该正则表达式.

any idea how to write that regex as I am not good at it.

推荐答案

如果您知道它们必须以http://开头，为什么不做这部分呢您需要的匹配项中的哪一个?您的正则表达式现在非常模糊，只是匹配引号之间的所有内容"

If you know that they must start with http://, why not make that part of your required match ? Your regex now is incredibly vague, it''s just ''match everything between the quotes''

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