You do realize that RFC 3986 actually contains an official regular expression, r...

mathias · on June 23, 2014

You do realize that RFC 3986 doesn’t actually match reality, right? http://url.spec.whatwg.org/#goals

TazeTSchnitzel · on June 23, 2014

That's for parsing a "well-formed" URI, not validating a URI as well-formed in the first place, however :)

saraid216 · on June 23, 2014

That doesn't work for validation.

lazyloop · on June 23, 2014

Of course it does, if that regular expression matches we have a valid URI. It's silly what gets downvoted on HN these days.

zAy0LfpBZLC8mAC · on June 23, 2014

No, it doesn't. This regular expression matches strings that are not URIs, and that should be quite obvious if you compare the grammar in that same RFC to the regex.

lazyloop · on June 23, 2014

Yes, it does. And it is quite obvious if you compare the grammar to the regular expression.

zAy0LfpBZLC8mAC · on June 23, 2014

Please show how to produce the following string (which is matched by that regex) from the grammar (without the quotes):

"%x"

(edit: actually, feel free to do it with the quotes included if you like, that would still be matched by that regex)