正则表达式来查找网页中的所有链接 [英] Regular Expression to find all links in webpage

问题描述

我试图在网站上找到源代码中的所有链接，任何人都可以告诉我我需要在我的正则表达式中找到这些表达式吗？ hr>

重复（除其他外）：用于解析网页链接的正则表达式？

Google发现更多： html链接正则表达式网站：stackoverflow.com

我不确定这些将如何转换为C＃（我自己还没有在C＃中进行过任何开发），但这里是我如何使用JavaScript或ColdFusion完成的。它可能会让您了解如何在C＃中执行此操作。

在JavaScript中，我认为这是可行的：

  rex = /.*href=\"([^\"]+)\"/; 
a = source.replace（rex，'\\\
 $ 1'）。split（'\\\
'）; 
  

之后a将是一个包含链接的数组......尽管我不确定这是否将按照我认为的方式工作，这里的想法是，替换会创建一个换行符分隔的列表（因为在URL中不能有换行符），然后可以通过拆分拆分列表（）来获得你的数组。

通过ColdFusion中的比较，你将不得不做一些稍微不同的事情：

  a = REMatch（'href =[^] +'，source）; 
 for（i = 1; i< ArrayLen（a）; i ++）{
 a [i] = mid（a [i]，6，len（a [i]） -  1）; 
} 
  

同样，我没有测试过它，但是复赛返回一个实例数组的表达式，然后for-next循环删除实际URL周围的href =。

I am trying to find all of the links in source code on a website, could anyone tell me the expression i would need to put in my Regex to find these?

---

Duplicate of (among others): Regular expression for parsing links from a webpage?

Google finds more: html links regex site:stackoverflow.com

解决方案

I'm not certain how these would translate to C# (I haven't done any development in C# myself yet), but here's how I might do it in JavaScript or ColdFusion. It might give you an idea about how you want to do it in C#.

In JavaScript I think this would work:

rex = /.*href="([^"]+)"/; 
a = source.replace(rex,'\n$1').split('\n'); 

after which a would be an array containing the links... though I'm not certain if that will work exactly the way I think it will. The idea here is that the replace creates a line-break-delimited list (because you can't have a line-break in a URL) and then you can break apart the list with split() to get your array.

By comparison in ColdFusion you would have to do something slightly different:

a = REMatch('href="[^"]+"',source); 
for (i = 1; i < ArrayLen(a); i++) {
  a[i] = mid(a[i],6,len(a[i])-1); 
} 

Again, I haven't tested it, but rematch returns an array of instances of the expression and then the for-next loop removes the href="" around the actual URL.

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