| 1 | # GNU MediaGoblin -- federated, autonomous media hosting |
| 2 | # Copyright (C) 2013 MediaGoblin contributors. See AUTHORS. |
| 3 | # |
| 4 | # This program is free software: you can redistribute it and/or modify |
| 5 | # it under the terms of the GNU Affero General Public License as published by |
| 6 | # the Free Software Foundation, either version 3 of the License, or |
| 7 | # (at your option) any later version. |
| 8 | # |
| 9 | # This program is distributed in the hope that it will be useful, |
| 10 | # but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 11 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 12 | # GNU Affero General Public License for more details. |
| 13 | # |
| 14 | # You should have received a copy of the GNU Affero General Public License |
| 15 | # along with this program. If not, see <http://www.gnu.org/licenses/>. |
| 16 | |
| 17 | import itsdangerous |
| 18 | import logging |
| 19 | |
| 20 | import crypto |
| 21 | |
| 22 | _log = logging.getLogger(__name__) |
| 23 | |
| 24 | class Session(dict): |
| 25 | def __init__(self, *args, **kwargs): |
| 26 | self.send_new_cookie = False |
| 27 | dict.__init__(self, *args, **kwargs) |
| 28 | |
| 29 | def save(self): |
| 30 | self.send_new_cookie = True |
| 31 | |
| 32 | def is_updated(self): |
| 33 | return self.send_new_cookie |
| 34 | |
| 35 | def delete(self): |
| 36 | self.clear() |
| 37 | self.save() |
| 38 | |
| 39 | |
| 40 | class SessionManager(object): |
| 41 | def __init__(self, cookie_name='MGSession', namespace=None): |
| 42 | if namespace is None: |
| 43 | namespace = cookie_name |
| 44 | self.signer = crypto.get_timed_signer_url(namespace) |
| 45 | self.cookie_name = cookie_name |
| 46 | |
| 47 | def load_session_from_cookie(self, request): |
| 48 | cookie = request.cookies.get(self.cookie_name) |
| 49 | if not cookie: |
| 50 | return Session() |
| 51 | ### FIXME: Future cookie-blacklisting code |
| 52 | # m = BadCookie.query.filter_by(cookie = cookie) |
| 53 | # if m: |
| 54 | # _log.warn("Bad cookie received: %s", m.reason) |
| 55 | # raise BadRequest() |
| 56 | try: |
| 57 | return Session(self.signer.loads(cookie)) |
| 58 | except itsdangerous.BadData: |
| 59 | return Session() |
| 60 | |
| 61 | def save_session_to_cookie(self, session, request, response): |
| 62 | if not session.is_updated(): |
| 63 | return |
| 64 | elif not session: |
| 65 | response.delete_cookie(self.cookie_name) |
| 66 | else: |
| 67 | response.set_cookie(self.cookie_name, self.signer.dumps(session), |
| 68 | httponly=True) |