79 lines
2.7 KiB
Python
79 lines
2.7 KiB
Python
# w.c.s. - web application for online forms
|
|
# Copyright (C) 2005-2010 Entr'ouvert
|
|
#
|
|
# This program 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 2 of the License, or
|
|
# (at your option) any later version.
|
|
#
|
|
# This program 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 this program; if not, see <http://www.gnu.org/licenses/>.
|
|
|
|
import datetime
|
|
import random
|
|
import string
|
|
|
|
from django.utils.timezone import make_aware, now
|
|
|
|
from .storage import Equal, Less, StorableObject
|
|
|
|
|
|
class Token(StorableObject):
|
|
_names = 'tokens'
|
|
MAX_DELAY = 365
|
|
|
|
type = None
|
|
expiration = None
|
|
context = None
|
|
|
|
def __init__(self, expiration_delay=86400, size=16, chars=None):
|
|
super().__init__(self.get_new_id(size=size, chars=chars))
|
|
if expiration_delay:
|
|
self.set_expiration_delay(expiration_delay)
|
|
|
|
def set_expiration_delay(self, expiration_delay):
|
|
expiration_delay = min(expiration_delay, self.MAX_DELAY * 86400) # max 1 year.
|
|
self.expiration = now() + datetime.timedelta(seconds=expiration_delay)
|
|
|
|
@classmethod
|
|
def get_new_id(cls, create=False, size=16, chars=None):
|
|
chars = chars or list(string.digits + string.ascii_letters)
|
|
r = random.SystemRandom()
|
|
while True:
|
|
id = ''.join([r.choice(chars) for x in range(size)])
|
|
if not cls.has_key(id):
|
|
return id
|
|
|
|
@classmethod
|
|
def get_or_create(cls, type, context):
|
|
try:
|
|
return (cls.select(clause=[Equal('type', type), Equal('context', context)])[0], False)
|
|
except (IndexError, KeyError):
|
|
token = cls()
|
|
token.type = type
|
|
token.context = context
|
|
return (token, True)
|
|
|
|
def migrate(self):
|
|
if isinstance(self.expiration, (float, int)):
|
|
self.expiration = min(
|
|
self.expiration, (now() + datetime.timedelta(days=self.MAX_DELAY)).timestamp()
|
|
)
|
|
self.expiration = make_aware(datetime.datetime.fromtimestamp(self.expiration), is_dst=True)
|
|
self.expiration_check()
|
|
|
|
def expiration_check(self):
|
|
if self.expiration and self.expiration < now():
|
|
self.remove_self()
|
|
raise KeyError()
|
|
|
|
@classmethod
|
|
def clean(cls):
|
|
# noqa pylint: disable=unexpected-keyword-arg
|
|
cls.wipe(clause=[Less('expiration', now())])
|