51 lines
1.9 KiB
Python
51 lines
1.9 KiB
Python
# Copyright (c) 2021 Wind River Systems Inc.
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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import importlib
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import logging
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from django.conf import settings
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from django.core.cache import caches
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LOG = logging.getLogger(__name__)
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class SimultaneousSessionsMiddleware(object):
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def __init__(self, get_response):
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self.get_response = get_response
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self.simultaneous_sessions = settings.SIMULTANEOUS_SESSIONS
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def __call__(self, request):
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self._process_request(request)
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response = self.get_response(request)
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return response
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def _process_request(self, request):
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cache = caches['default']
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cache_key = ('user_pk_{}_restrict').format(request.user.pk)
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cache_value = cache.get(cache_key)
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if cache_value and self.simultaneous_sessions == 'disconnect':
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if request.session.session_key != cache_value:
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LOG.info('The user %s is already logged in, '
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'the last session will be disconnected.',
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request.user.id)
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engine = importlib.import_module(settings.SESSION_ENGINE)
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session = engine.SessionStore(session_key=cache_value)
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session.delete()
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cache.set(cache_key, request.session.session_key,
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settings.SESSION_TIMEOUT)
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else:
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cache.set(cache_key, request.session.session_key,
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settings.SESSION_TIMEOUT)
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