通过正则表达式匹配网址 [英] Matching a web address through regex

问题描述

我想通过正则表达式匹配一个应该捕获 http://www.google.com 的网址以及 www.google.com，即有和没有协议.

I want to match a web address through regex which should capture http://www.google.com as well as www.google.com i.e. with and without protocol.

推荐答案

嗯，这将取决于您想要捕获的确切内容(FTP"?/index.htm"?)，因为一般的 URI 捕获基于RFC 标准非常难，但你可以从:

Well it's going to depend on exactly what you want to capture ("FTP"? "/index.htm"?) because a general URI capture based on the RFC standard is very hard, but you could start with:

/^((https?\:\/\/)?([\w\d\-]+\.){2,}([\w\d]{2,})((\/[\w\d\-\.]+)*(\/[\w\d\-]+\.[\w\d]{3,4}(\?.*)?)?)?)$/

复杂吗?

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