Re: [apps-discuss] Fun with URLs and regex

[Sam Ruby <[e-mail]>]

On 01/28/2015 04:40 PM, Roy T. Fielding wrote:
> On Jan 28, 2015, at 1:14 PM, Julian Reschke wrote:
>> On 2015-01-28 06:36, Mark Nottingham wrote:
>>> ... which brings about another interesting observation -- only http and https define fragments in their syntax; the other schemes do not.
>>> ...
>>
>> It's because you asked for that in <https://lists.w3.org/Archives/Public/ietf-http-wg/2013AprJun/0187.html>, and apparently were successful in convincing Roy.
>
> It is a very very very old debate regarding whether the fragment is part
> of a URI or something attached to the end of a URI, but that was resolved
> in RFC3986 (since the only thing that really matters here is that a fragment
> is going to be parsed as such regardless of the scheme).
>
> HTTP was merely updated to reflect what STD66 calls a URI.

Based on this discussion, I am gathering that the correct way to 
validate a URI with a known scheme is as follows:

   return new RegExp("^" + known[scheme] + "($|#" + fragment + 
")").test(string)

Anybody care to confirm or deny?

The full script is available here:

https://url.spec.whatwg.org/reference-implementation/uri-validate.js

The function in question is at the bottom of this script.

> ....Roy

- Sam Ruby