A lot of these regexes miss the whole point of validation. The key problem that needs to be solved here is to find if a URL is syntactically correct. A lot of t

A lot of these regexes miss the whole point of validation. The key problem that needs to be solved here is to find if a URL is syntactically correct. A lot of them focus on the semantics as well. Thus hardcoding the TLDs is not needed at all, so http://microsoft.com http://microsoft.com and http://microsoft.foobar http://microsoft.foobar should both be valid (I could have the latter in my /etc/hosts). Also, that's what the DNS is used for.