问题描述
我有大量用户提交的内容.它是 HTML，并且可能包含 URL.其中一些将是 <a> 的(如果用户很好)，但有时用户很懒惰，只需输入 www.something.com 或至多 http://www.something.com.
I have a load of user-submitted content. It is HTML, and may contain URLs. Some of them will be <a>'s already (if the user is good) but sometimes users are lazy and just type www.something.com or at best http://www.something.com.
我找不到合适的正则表达式来捕获 URL，但会忽略紧接在双引号或>"右侧的那些.有人有吗?
I can't find a decent regex to capture URLs but ignore ones that are immediately to the right of either a double quote or '>'. Anyone got one?
推荐答案
Jan Goyvaerts，RegexBuddy 的创建者，拥有写了回复给 Jeff Atwood 的解决 Jeff 遇到的问题并提供了很好的解决方案的博客.
Jan Goyvaerts, creator of RegexBuddy, has written a response to Jeff Atwood's blog that addresses the issues Jeff had and provides a nice solution.
(?:(?:https?|ftp|file)://|www.|ftp.)[-A-Z0-9+&@#/%=~_|$?!:,.]*[A-Z0-9+&@#/%=~_|$]
为了忽略紧邻 " 或 > 的匹配项，您可以将 (?<![">]) 添加到正则表达式的开头，这样您就可以得到
In order to ignore matches that occur right next to a " or >, you could add (?<![">]) to the start of the regex, so you get
(?<![">])(?:(?:https?|ftp|file)://|www.|ftp.)[-A-Z0-9+&@#/%=~_|$?!:,.]*[A-Z0-9+&@#/%=~_|$]
这将匹配完整地址(http://...)和以 www 开头的地址.或ftp.- 你对像ars.userfriendly.org这样的地址不走运...
This will match full addresses (http://...) and addresses that start with www. or ftp. - you're out of luck with addresses like ars.userfriendly.org...
这篇关于需要一个好的正则表达式来将 URL 转换为链接，但不要理会现有的链接的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！