root: use channel send workaround for sync sending of websocket messages

Signed-off-by: Jens Langhammer <jens@goauthentik.io>

authentik/outposts/tasks.py

@@ -7,7 +7,6 @@ from urllib.parse import urlparse
 
 import yaml
 from asgiref.sync import async_to_sync
-from channels.layers import get_channel_layer
 from django.core.cache import cache
 from django.db import DatabaseError, InternalError, ProgrammingError
 from django.db.models.base import Model
@@ -43,6 +42,7 @@ from authentik.providers.ldap.controllers.kubernetes import LDAPKubernetesContro
 from authentik.providers.proxy.controllers.docker import ProxyDockerController
 from authentik.providers.proxy.controllers.kubernetes import ProxyKubernetesController
 from authentik.root.celery import CELERY_APP
+from authentik.root.messages.storage import closing_send
 
 LOGGER = get_logger()
 CACHE_KEY_OUTPOST_DOWN = "outpost_teardown_%s"
@@ -217,26 +217,23 @@ def outpost_post_save(model_class: str, model_pk: Any):
 def outpost_send_update(model_instace: Model):
     """Send outpost update to all registered outposts, regardless to which authentik
     instance they are connected"""
-    channel_layer = get_channel_layer()
     if isinstance(model_instace, OutpostModel):
         for outpost in model_instace.outpost_set.all():
-            _outpost_single_update(outpost, channel_layer)
+            _outpost_single_update(outpost)
     elif isinstance(model_instace, Outpost):
-        _outpost_single_update(model_instace, channel_layer)
+        _outpost_single_update(model_instace)
 
 
-def _outpost_single_update(outpost: Outpost, layer=None):
+def _outpost_single_update(outpost: Outpost):
     """Update outpost instances connected to a single outpost"""
     # Ensure token again, because this function is called when anything related to an
     # OutpostModel is saved, so we can be sure permissions are right
     _ = outpost.token
     outpost.build_user_permissions(outpost.user)
-    if not layer:  # pragma: no cover
-        layer = get_channel_layer()
     for state in OutpostState.for_outpost(outpost):
         for channel in state.channel_ids:
             LOGGER.debug("sending update", channel=channel, instance=state.uid, outpost=outpost)
-            async_to_sync(layer.send)(channel, {"type": "event.update"})
+            async_to_sync(closing_send)(channel, {"type": "event.update"})
 
 
 @CELERY_APP.task()

authentik/root/messages/storage.py

@@ -1,6 +1,7 @@
 """Channels Messages storage"""
 from asgiref.sync import async_to_sync
-from channels.layers import get_channel_layer
+from channels import DEFAULT_CHANNEL_LAYER
+from channels.layers import channel_layers
 from django.contrib.messages.storage.base import Message
 from django.contrib.messages.storage.session import SessionStorage
 from django.core.cache import cache
@@ -10,13 +11,21 @@ SESSION_KEY = "_messages"
 CACHE_PREFIX = "goauthentik.io/root/messages_"
 
 
+async def closing_send(channel, message):
+    """Wrapper around layer send that closes the connection"""
+    # See https://github.com/django/channels_redis/issues/332
+    # TODO: Remove this after channels_redis 4.1 is released
+    channel_layer = channel_layers.make_backend(DEFAULT_CHANNEL_LAYER)
+    await channel_layer.send(channel, message)
+    await channel_layer.close_pools()
+
+
 class ChannelsStorage(SessionStorage):
     """Send contrib.messages over websocket"""
 
     def __init__(self, request: HttpRequest) -> None:
         # pyright: reportGeneralTypeIssues=false
         super().__init__(request)
-        self.channel = get_channel_layer()
 
     def _store(self, messages: list[Message], response, *args, **kwargs):
         prefix = f"{CACHE_PREFIX}{self.request.session.session_key}_messages_"
@@ -28,7 +37,7 @@ class ChannelsStorage(SessionStorage):
         for key in keys:
             uid = key.replace(prefix, "")
             for message in messages:
-                async_to_sync(self.channel.send)(
+                async_to_sync(closing_send)(
                     uid,
                     {
                         "type": "event.update",

pyproject.toml

@@ -1,8 +1,5 @@
 [tool.pyright]
-ignore = [
-  "**/migrations/**",
-  "**/node_modules/**"
-]
+ignore = ["**/migrations/**", "**/node_modules/**"]
 reportMissingTypeStubs = false
 strictParameterNoneValue = true
 strictDictionaryInference = true
@@ -63,14 +60,7 @@ exclude_lines = [
 show_missing = true
 
 [tool.pylint.basic]
-good-names = [
-  "pk",
-  "id",
-  "i",
-  "j",
-  "k",
-  "_",
-]
+good-names = ["pk", "id", "i", "j", "k", "_"]
 
 [tool.pylint.master]
 disable = [
@@ -85,6 +75,7 @@ disable = [
   "protected-access",
   "unused-argument",
   "raise-missing-from",
+  "fixme",
   # To preserve django's translation function we need to use %-formatting
   "consider-using-f-string",
 ]