Fixes to support Django Channels 4.

fear_tracker/routing.py

@@ -1,7 +1,12 @@
-from channels.http import AsgiHandler
 from channels.routing import ProtocolTypeRouter, URLRouter
 
+import django
 from django.conf.urls import url
+from django.core.asgi import get_asgi_application
+
+# TODO Importing views breaks if django.setup() isn't called first...
+#      ... but this isn't the way this is supposed to work.
+django.setup()
 
 from . import views
 
@@ -9,8 +14,8 @@ application = ProtocolTypeRouter({
     "http": URLRouter([
         url(r'^(?P<access_code>[a-zA-Z]{6})/', URLRouter([
             url(r"status/(?P<hashcode>[a-z0-9]{64})/",
-                views.StatusLongPollConsumer, name='status'),
+                views.StatusLongPollConsumer.as_asgi(), name='status'),
         ])),
-        url(r"", AsgiHandler),
+        url(r"", get_asgi_application()),
     ]),
 })

fear_tracker/views.py

@@ -377,7 +377,7 @@ class StatusLongPollConsumer(AsyncHttpConsumer):
 
     async def fear_tracker_hashcode_seen(self, event):
         if self.hashcode != event["hashcode"]:
-            if event["status_string"]:
+            if "status_string" in event and event["status_string"]:
                 body = event["status_string"].encode('utf-8')
                 await self.send_response(200, body)
                 await self.disconnect()

fear_tracker_site/asgi.py

@@ -3,10 +3,9 @@ ASGI entrypoint. Configures Django and then runs the application
 defined in the ASGI_APPLICATION setting.
 """
 
-import os
 import django
-from channels.routing import get_default_application
 
-os.environ.setdefault("DJANGO_SETTINGS_MODULE", "fear_tracker_site.settings")
+import fear_tracker.routing
+
 django.setup()
-application = get_default_application()
+application = fear_tracker.routing.application