Hi Julien,

Julien Lepiller <julien@lepiller.eu> skribis:

> Using (web uri), I was trying to parse "uri://a/c". Reading RFC3986, it should be a valid URI (see rule for reg-name in 3.2.2). However, passing it to string->uri results in #f. I've tracked this down to valid-host? which returns #f for "a".
>
> The reason is that the regexp checking if the host is an ipv6 matches "a", which shouldn't happen because a is not an ipv6 address. Indeed, when I try (string->uri "uri://g/b"), I get the expected result.

Right.  ‘authority-regexp’ is fine, but ‘ipv6-regexp’, used by
‘valid-host?’, was too lax and would match “a” because it’s an hex digit
sequence.

The regexp below is still an approximation, but I think a better one.
Can you confirm?

Thanks,
Ludo’.