backend that supports asgi and status update sockets with channels

src/paperless/asgi.py

@@ -0,0 +1,37 @@
+import json
+import os
+
+from asgiref.sync import async_to_sync
+from channels.auth import AuthMiddlewareStack
+from channels.generic.websocket import WebsocketConsumer
+from channels.routing import ProtocolTypeRouter, URLRouter
+from django.core.asgi import get_asgi_application
+from django.urls import re_path
+
+os.environ.setdefault('DJANGO_SETTINGS_MODULE', 'paperless.settings')
+
+
+class StatusConsumer(WebsocketConsumer):
+    def connect(self):
+        self.accept()
+        async_to_sync(self.channel_layer.group_add)('status_updates', self.channel_name)
+
+    def disconnect(self, close_code):
+        async_to_sync(self.channel_layer.group_discard)('status_updates', self.channel_name)
+
+    def status_update(self, event):
+        self.send(json.dumps(event['data']))
+
+
+websocket_urlpatterns = [
+    re_path(r'ws/status/$', StatusConsumer.as_asgi()),
+]
+
+application = ProtocolTypeRouter({
+    "http": get_asgi_application(),
+    "websocket": AuthMiddlewareStack(
+        URLRouter(
+            websocket_urlpatterns
+        )
+    ),
+})