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# Copyright 2009 Canonical Ltd. This software is licensed under the
# GNU Affero General Public License version 3 (see the file LICENSE).
"""EmailAdress validator"""
__metaclass__ = type
import re
from canonical.launchpad import _
from lp.app.validators import LaunchpadValidationError
def valid_email(emailaddr):
"""Validate an email address.
>>> valid_email('kiko.async@hotmail.com')
True
>>> valid_email('kiko+async@hotmail.com')
True
>>> valid_email('kiko-async@hotmail.com')
True
>>> valid_email('kiko_async@hotmail.com')
True
>>> valid_email('kiko@async.com.br')
True
>>> valid_email('kiko@canonical.com')
True
>>> valid_email('kiko@UBUNTU.COM')
True
>>> valid_email('i@tv')
True
>>> valid_email('kiko@gnu.info')
True
>>> valid_email('user@z.de')
True
>>> valid_email('bob=dobbs@example.com')
True
>>> valid_email('user@z..de')
False
>>> valid_email('user@.z.de')
False
As per OOPS-256D762:
>>> valid_email('keith@risby-family.co.uk')
True
>>> valid_email('keith@risby-family-.co.uk')
False
>>> valid_email('keith@-risby-family.co.uk')
False
"""
email_re = r"^[_\.0-9a-zA-Z-+=]+@(([0-9a-zA-Z-]{1,}\.)*)[a-zA-Z]{2,}$"
email_match = re.match(email_re, emailaddr)
if not email_match:
return False
host_minus_tld = email_match.group(1)
if not host_minus_tld:
return True
for part in host_minus_tld.split("."):
if part.startswith("-") or part.endswith("-"):
return False
return True
def email_validator(emailaddr):
"""Raise a LaunchpadValidationError if the email is invalid.
Otherwise, return True.
>>> email_validator('bugs@example.com')
True
>>> email_validator('not-valid')
Traceback (most recent call last):
...
LaunchpadValidationError: Invalid email 'not-valid'.
"""
if not valid_email(emailaddr):
raise LaunchpadValidationError(_(
"Invalid email '${email}'.", mapping={'email': emailaddr}))
return True
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