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# Copyright (C) 2009 by the Free Software Foundation, Inc.
#
# This file is part of GNU Mailman.
#
# GNU Mailman is free software: you can redistribute it and/or modify it under
# the terms of the GNU General Public License as published by the Free
# Software Foundation, either version 3 of the License, or (at your option)
# any later version.
#
# GNU Mailman is distributed in the hope that it will be useful, but WITHOUT
# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
# FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
# more details.
#
# You should have received a copy of the GNU General Public License along with
# GNU Mailman. If not, see <http://www.gnu.org/licenses/>.
"""Module stuff."""
from __future__ import absolute_import, unicode_literals
__metaclass__ = type
__all__ = [
'is_valid',
'validate',
]
import re
from mailman.core.errors import InvalidEmailAddress
from mailman.email.utils import split_email
# What other characters should be disallowed?
_badchars = re.compile(r'[][()<>|;^,\000-\037\177-\377]')
def validate(address):
"""Validate an email address.
:param address: An email address.
:type address: string
:raise `InvalidEmailAddress`: when the address is deemed invalid.
"""
if not is_valid(address):
raise InvalidEmailAddress(repr(address))
def is_valid(address):
"""Check if an email address if valid.
:param address: An email address.
:type address: string
:return: A flag indicating whether the email address is okay or not.
:rtype: bool
"""
if not address or ' ' in address:
return False
if _badchars.search(address) or address[0] == '-':
return False
user, domain_parts = split_email(address)
# Local, unqualified addresses are not allowed.
if not domain_parts:
return False
if len(domain_parts) < 2:
return False
return True
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