Wikipedia:Lua/Modul/URLutil/en

URLutil – Module with functions for strings in context of internet addressing (URL; IP address – including IPv4 and IPv6 – as well as e-mail). Internationalized adresses (IRI) are also supported.

Supposing some benefit for a Wiki project, only persistent open access in world wide web is supported. Some special cases are not implemented, but hardly relevant:

• IPv4 address not in common notation (dotted decimal)
• URL with IPv6 host (in brackets; slightly opposing wikisyntax)
• Authority with username