141 lines
5 KiB
Python
141 lines
5 KiB
Python
# -*- coding: utf-8 -*-
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################################################################################
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#
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# Rattail -- Retail Software Framework
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# Copyright © 2010-2017 Lance Edgar
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#
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# This file is part of Rattail.
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#
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# Rattail is free software: you can redistribute it and/or modify it under the
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# terms of the GNU General Public License as published by the Free Software
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# Foundation, either version 3 of the License, or (at your option) any later
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# version.
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#
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# Rattail is distributed in the hope that it will be useful, but WITHOUT ANY
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# WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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# FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
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# details.
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#
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# You should have received a copy of the GNU General Public License along with
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# Rattail. If not, see <http://www.gnu.org/licenses/>.
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#
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################################################################################
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"""
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Custom sessions, based on Beaker
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Note that most of the code for this module was copied from the beaker and
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pyramid_beaker projects.
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"""
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from __future__ import unicode_literals, absolute_import
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import time
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from beaker.session import Session
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from beaker.util import coerce_session_params
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from pyramid.settings import asbool
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from pyramid_beaker import BeakerSessionFactoryConfig, set_cache_regions_from_settings
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class TailboneSession(Session):
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"""
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Custom session class for Beaker, which overrides load() to add per-request
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session timeout support.
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"""
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def load(self):
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"Loads the data from this session from persistent storage"
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self.namespace = self.namespace_class(self.id,
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data_dir=self.data_dir,
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digest_filenames=False,
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**self.namespace_args)
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now = time.time()
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if self.use_cookies:
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self.request['set_cookie'] = True
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self.namespace.acquire_read_lock()
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timed_out = False
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try:
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self.clear()
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try:
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session_data = self.namespace['session']
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if (session_data is not None and self.encrypt_key):
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session_data = self._decrypt_data(session_data)
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# Memcached always returns a key, its None when its not
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# present
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if session_data is None:
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session_data = {
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'_creation_time': now,
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'_accessed_time': now
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}
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self.is_new = True
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except (KeyError, TypeError):
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session_data = {
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'_creation_time': now,
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'_accessed_time': now
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}
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self.is_new = True
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if session_data is None or len(session_data) == 0:
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session_data = {
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'_creation_time': now,
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'_accessed_time': now
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}
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self.is_new = True
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# TODO: sure would be nice if we could get this little bit of logic
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# into the upstream Beaker package, as that would avoid the need
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# for this module entirely...
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timeout = session_data.get('_timeout', self.timeout)
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if timeout is not None and \
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now - session_data['_accessed_time'] > timeout:
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timed_out = True
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else:
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# Properly set the last_accessed time, which is different
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# than the *currently* _accessed_time
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if self.is_new or '_accessed_time' not in session_data:
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self.last_accessed = None
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else:
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self.last_accessed = session_data['_accessed_time']
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# Update the current _accessed_time
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session_data['_accessed_time'] = now
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# Set the path if applicable
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if '_path' in session_data:
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self._path = session_data['_path']
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self.update(session_data)
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self.accessed_dict = session_data.copy()
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finally:
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self.namespace.release_read_lock()
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if timed_out:
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self.invalidate()
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def session_factory_from_settings(settings):
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""" Return a Pyramid session factory using Beaker session settings
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supplied from a Paste configuration file"""
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prefixes = ('session.', 'beaker.session.')
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options = {}
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# Pull out any config args meant for beaker session. if there are any
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for k, v in settings.items():
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for prefix in prefixes:
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if k.startswith(prefix):
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option_name = k[len(prefix):]
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if option_name == 'cookie_on_exception':
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v = asbool(v)
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options[option_name] = v
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options = coerce_session_params(options)
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options['session_class'] = TailboneSession
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return BeakerSessionFactoryConfig(**options)
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def includeme(config):
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session_factory = session_factory_from_settings(config.registry.settings)
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config.set_session_factory(session_factory)
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set_cache_regions_from_settings(config.registry.settings)
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