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59 lines
2.7 KiB
Python
59 lines
2.7 KiB
Python
#
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# This file is part of pretix (Community Edition).
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#
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# Copyright (C) 2014-2020 Raphael Michel and contributors
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# Copyright (C) 2020-2021 rami.io GmbH and contributors
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#
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# This program is free software: you can redistribute it and/or modify it under the terms of the GNU Affero General
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# Public License as published by the Free Software Foundation in version 3 of the License.
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#
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# ADDITIONAL TERMS APPLY: Pursuant to Section 7 of the GNU Affero General Public License, additional terms are
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# applicable granting you additional permissions and placing additional restrictions on your usage of this software.
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# Please refer to the pretix LICENSE file to obtain the full terms applicable to this work. If you did not receive
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# this file, see <https://pretix.eu/about/en/license>.
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#
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# This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied
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# warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Affero 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 Affero General Public License along with this program. If not, see
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# <https://www.gnu.org/licenses/>.
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#
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import contextvars
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from django.conf import settings
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from django.db import connection
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debugflags_var = contextvars.ContextVar('debugflags', default=frozenset())
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class DebugFlagMiddleware:
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def __init__(self, get_response):
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self.get_response = get_response
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def __call__(self, request):
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if '_debug_flag' in request.GET:
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debugflags_var.set(frozenset(request.GET.getlist('_debug_flag')))
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else:
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debugflags_var.set(frozenset())
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if 'skip-csrf' in debugflags_var.get():
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request.csrf_processing_done = True
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if 'repeatable-read' in debugflags_var.get():
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with connection.cursor() as cursor:
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if 'postgresql' in settings.DATABASES['default']['ENGINE']:
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cursor.execute('SET SESSION CHARACTERISTICS AS TRANSACTION ISOLATION LEVEL REPEATABLE READ;')
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elif 'mysql' in settings.DATABASES['default']['ENGINE']:
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cursor.execute('SET SESSION TRANSACTION ISOLATION LEVEL REPEATABLE READ;')
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try:
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return self.get_response(request)
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finally:
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if 'repeatable-read' in debugflags_var.get():
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with connection.cursor() as cursor:
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if 'postgresql' in settings.DATABASES['default']['ENGINE']:
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cursor.execute('SET SESSION CHARACTERISTICS AS TRANSACTION ISOLATION LEVEL READ COMMITTED;')
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elif 'mysql' in settings.DATABASES['default']['ENGINE']:
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cursor.execute('SET SESSION TRANSACTION ISOLATION LEVEL READ COMMITTED;')
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