feat: websockets

config/asgi.py

@@ -4,4 +4,19 @@ from django.core.asgi import get_asgi_application
 
 os.environ.setdefault('DJANGO_SETTINGS_MODULE', 'config.settings')
 
-application = get_asgi_application()
+# get_asgi_application() llama a django.setup(): tiene que ejecutarse antes de
+# importar routing/consumers, porque estos importan modelos.
+django_asgi_app = get_asgi_application()
+
+from channels.auth import AuthMiddlewareStack  # noqa: E402
+from channels.routing import ProtocolTypeRouter, URLRouter  # noqa: E402
+from channels.security.websocket import AllowedHostsOriginValidator  # noqa: E402
+
+from backoffice.routing import websocket_urlpatterns  # noqa: E402
+
+application = ProtocolTypeRouter(
+    {
+        'http': django_asgi_app,
+        'websocket': AllowedHostsOriginValidator(AuthMiddlewareStack(URLRouter(websocket_urlpatterns))),
+    }
+)

config/settings/base.py

@@ -23,6 +23,7 @@ if not DEBUG:
 
 
 DJANGO_APPS = [
+    'daphne',  # antes de staticfiles: hace que runserver sirva HTTP y WS
     'unfold',  # before django.contrib.admin
     'django.contrib.admin',
     'django.contrib.auth',
@@ -33,6 +34,7 @@ DJANGO_APPS = [
 ]
 
 THIRD_PARTY_APPS = [
+    'channels',
     'corsheaders',
     'django_extensions',
     'django_filters',
@@ -88,6 +90,16 @@ TEMPLATES = [
 ]
 
 WSGI_APPLICATION = 'config.wsgi.application'
+ASGI_APPLICATION = 'config.asgi.application'
+
+# Channels usa el mismo Redis que ya sirve de broker de Celery (ver
+# REDIS_HOST/REDIS_PORT en config/settings/environ.py).
+CHANNEL_LAYERS = {
+    'default': {
+        'BACKEND': 'channels_redis.core.RedisChannelLayer',
+        'CONFIG': {'hosts': [(REDIS_HOST, int(REDIS_PORT))]},
+    },
+}
 
 
 # Database