>
> Folks wanting this can subclass URLValidator.
>
For anyone who does want this, the subclass is not so much work. You can
inherit the regex pieces from URLValidator and edit them to insert _ as a
valid character:
In [18]: import re
...:
...: from django.core.validators import URLValidator
...:
...:
...: class LenientURLValidator(URLValidator):
...: hostname_re = URLValidator.hostname_re.replace('0-9]',
'0-9_]').replace('0-9-]', '0-9-_]')
...: domain_re = URLValidator.domain_re.replace('0-9-]', '0-9-_]')
...: host_re = '(' + hostname_re + domain_re + URLValidator.tld_re
+ '|localhost)'
...:
...: regex = re.compile(
...: r'^(?:[a-z0-9.+-]*)://' # scheme is validated separately
...: r'(?:[^\s:@/]+(?::[^\s:@/]*)?@)?' # user:pass
authentication
...: r'(?:' + URLValidator.ipv4_re + '|' + URLValidator.ipv6_re
+ '|' + host_re + ')'
...: r'(?::\d{2,5})?' # port
...: r'(?:[/?#][^\s]*)?' # resource path
...: r'\Z', re.IGNORECASE)
...:
In [19]: LenientURLValidator()('
http://online_casino_news.hundredpercentgambling.com/') # no
ValidationError
It's a little tricky in the re.compile step that's copied form the
superclass, but it works.
On Thu, 26 Mar 2020 at 17:28, James Bennett <[email protected]> wrote:
> I'm also in the "I don't think this should be allowed" camp. People
> who really need it can set up their own validator easily enough, and I
> worry about the security implications of supporting non-standard
> behavior in something as crucial as hostname validation -- Django's
> been bitten by that sort of thing several times in the past.
>
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> .
>
--
Adam
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