core: migrate all sessions to the database (#9736)

Signed-off-by: Marc 'risson' Schmitt <marc.schmitt@risson.space>

authentik/core/tasks.py

@@ -2,22 +2,16 @@
 
 from datetime import datetime, timedelta
 
-from django.conf import ImproperlyConfigured
-from django.contrib.sessions.backends.cache import KEY_PREFIX
-from django.contrib.sessions.backends.db import SessionStore as DBSessionStore
-from django.core.cache import cache
 from django.utils.timezone import now
 from structlog.stdlib import get_logger
 
 from authentik.core.models import (
     USER_ATTRIBUTE_EXPIRES,
     USER_ATTRIBUTE_GENERATED,
-    AuthenticatedSession,
     ExpiringModel,
     User,
 )
 from authentik.events.system_tasks import SystemTask, TaskStatus, prefill_task
-from authentik.lib.config import CONFIG
 from authentik.root.celery import CELERY_APP
 
 LOGGER = get_logger()
@@ -38,40 +32,6 @@ def clean_expired_models(self: SystemTask):
             obj.expire_action()
         LOGGER.debug("Expired models", model=cls, amount=amount)
         messages.append(f"Expired {amount} {cls._meta.verbose_name_plural}")
-    # Special case
-    amount = 0
-
-    for session in AuthenticatedSession.objects.all():
-        match CONFIG.get("session_storage", "cache"):
-            case "cache":
-                cache_key = f"{KEY_PREFIX}{session.session_key}"
-                value = None
-                try:
-                    value = cache.get(cache_key)
-
-                except Exception as exc:
-                    LOGGER.debug("Failed to get session from cache", exc=exc)
-                if not value:
-                    session.delete()
-                    amount += 1
-            case "db":
-                if not (
-                    DBSessionStore.get_model_class()
-                    .objects.filter(session_key=session.session_key, expire_date__gt=now())
-                    .exists()
-                ):
-                    session.delete()
-                    amount += 1
-            case _:
-                # Should never happen, as we check for other values in authentik/root/settings.py
-                raise ImproperlyConfigured(
-                    "Invalid session_storage setting, allowed values are db and cache"
-                )
-    if CONFIG.get("session_storage", "cache") == "db":
-        DBSessionStore.clear_expired()
-    LOGGER.debug("Expired sessions", model=AuthenticatedSession, amount=amount)
-
-    messages.append(f"Expired {amount} {AuthenticatedSession._meta.verbose_name_plural}")
     self.set_status(TaskStatus.SUCCESSFUL, *messages)