After Installing Channels Daphne throws 500 Internal Server Error - django-channels

Question

I am trying out django channels 2.x. After installing and configuring channels. When I execute the runserver command. I get the following error
Traceback (most recent call last): File
"C:\Subbu\Episkope\Lessons\Django\WsChat\env\lib\site-packages\daphne\http_protocol.py",
line 179, in process
"server": self.server_addr, TypeError: call() got an unexpected keyword argument 'receive'
My settings file:
"""
Django settings for WsChatProj project.
Generated by 'django-admin startproject' using Django 2.2.
For more information on this file, see
https://docs.djangoproject.com/en/2.2/topics/settings/
For the full list of settings and their values, see
https://docs.djangoproject.com/en/2.2/ref/settings/
"""
import os
# Build paths inside the project like this: os.path.join(BASE_DIR, ...)
BASE_DIR = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
# Quick-start development settings - unsuitable for production
# See https://docs.djangoproject.com/en/2.2/howto/deployment/checklist/
# SECURITY WARNING: keep the secret key used in production secret!
SECRET_KEY = 'kl$#^tt6qnt8ww^rrhmj&&(l0&as4w-#fkb&a0e#^#&vz3*t)a'
# SECURITY WARNING: don't run with debug turned on in production!
DEBUG = True
ALLOWED_HOSTS = []
# Application definition
INSTALLED_APPS = [
'django.contrib.admin',
'django.contrib.auth',
'django.contrib.contenttypes',
'django.contrib.sessions',
'django.contrib.messages',
'django.contrib.staticfiles',
'channels',
'WsChatApp',
]
MIDDLEWARE = [
'django.middleware.security.SecurityMiddleware',
'django.contrib.sessions.middleware.SessionMiddleware',
'django.middleware.common.CommonMiddleware',
'django.middleware.csrf.CsrfViewMiddleware',
'django.contrib.auth.middleware.AuthenticationMiddleware',
'django.contrib.messages.middleware.MessageMiddleware',
'django.middleware.clickjacking.XFrameOptionsMiddleware',
]
ROOT_URLCONF = 'WsChatProj.urls'
STATIC_URL = '/static/'
# Extra places for collectstatic to find static files.
STATICFILES_DIRS = [
os.path.join(BASE_DIR, 'static'),
]
TEMPLATES = [
{
'BACKEND': 'django.template.backends.django.DjangoTemplates',
'DIRS': [],
'APP_DIRS': True,
'OPTIONS': {
'context_processors': [
'django.template.context_processors.debug',
'django.template.context_processors.request',
'django.contrib.auth.context_processors.auth',
'django.contrib.messages.context_processors.messages',
],
},
},
]
WSGI_APPLICATION = 'WsChatProj.wsgi.application'
# Database
# https://docs.djangoproject.com/en/2.2/ref/settings/#databases
DATABASES = {
'default': {
'ENGINE': 'django.db.backends.sqlite3',
'NAME': os.path.join(BASE_DIR, 'db.sqlite3'),
}
}
# Password validation
# https://docs.djangoproject.com/en/2.2/ref/settings/#auth-password-validators
AUTH_PASSWORD_VALIDATORS = [
{
'NAME': 'django.contrib.auth.password_validation.UserAttributeSimilarityValidator',
},
{
'NAME': 'django.contrib.auth.password_validation.MinimumLengthValidator',
},
{
'NAME': 'django.contrib.auth.password_validation.CommonPasswordValidator',
},
{
'NAME': 'django.contrib.auth.password_validation.NumericPasswordValidator',
},
]
# Internationalization
# https://docs.djangoproject.com/en/2.2/topics/i18n/
LANGUAGE_CODE = 'en-us'
TIME_ZONE = 'UTC'
USE_I18N = True
USE_L10N = True
USE_TZ = True
# Static files (CSS, JavaScript, Images)
# https://docs.djangoproject.com/en/2.2/howto/static-files/
STATIC_URL = '/static/'
ASGI_APPLICATION = 'WsChatApp.routing.application'
My asgi.py
import os
import django
from channels.routing import get_default_application
os.environ.setdefault("DJANGO_SETTINGS_MODULE", "WsChatApp.settings")
django.setup()
application = get_default_application()
My routing.py
from django.conf.urls import url
from django.urls import path
from channels.routing import ProtocolTypeRouter, URLRouter
from channels.auth import AuthMiddlewareStack
from channels.security.websocket import AllowedHostsOriginValidator, OriginValidator
# from WsChatApp.consumers import ChatConsumer
application = ProtocolTypeRouter
({
})
I have commented out the consumers.py completely just to first solve this error so there are no consumers at the moment
Library Versions
Channels 2.2.0
asgiref 2.2.0
redis 2.10.6
asgi-redis 1.4.3
The other question I have is, is it not absolutely necessary to have a channel layer? because in the tutorial I am following they are setting no channel info in the settings.py. Does the latest channels library manage this under the hood?

Answer 1

You need to make changes in your asgi.py
Make this as your asgi.py
"""
ASGI config for proj project.
It exposes the ASGI callable as a module-level variable named ``application``.
For more information on this file, see
https://docs.djangoproject.com/en/3.0/howto/deployment/asgi/
"""
import os
from django.core.asgi import get_asgi_application
import django
from channels.http import AsgiHandler
from channels.routing import ProtocolTypeRouter, URLRouter
from channels.auth import AuthMiddlewareStack
from django.urls import path
os.environ.setdefault('DJANGO_SETTINGS_MODULE', 'proj.settings')
application = get_asgi_application()
ws_pattern = []
application = ProtocolTypeRouter({
"websocket" : AuthMiddlewareStack(URLRouter(
ws_pattern
))
})