Domain whitelist

gistfile1.py

import re

class DomainWhitelist(object):
    url_re = re.compile(
        r'([a-z0-9]+([\-\.]{1}[a-z0-9]+)*\.[a-z]{2,6})',
        re.IGNORECASE)

    kogama_re = re.compile(
        r'^(http[s]?://)?([a-z0-9-.]{2,8})?kogama.com(.br)?',
        re.IGNORECASE)

    def check(self, value):
        for url in self.url_re.findall(value):
            if not self.kogama_re.match(''.join(url)):
                return False
        return True

We may have problems with usernames don't we? http://rubular.com/r/nFfQpESoPP

Yes and no. You wont be able to write a comment with the username "simon.kogama" in it. However, that is not something we can solve, since domain and user names follow some of the same rules.

We do however not run these validations on usernames directly. Usernames are upon creation checked versus a much stricter regex which limits the possibilities. You can create a username like this xxx.com, but that is about it.