Hello everyone! I recently deployed a project I’m working on to production. I use DjangoChannelsGraphqlWs for GraphQL subscription functionalities. and I have GraphQL Playground set up via django-graphql-playground. Everything works fine locally - there are no issues whatsoever - subscriptions work fine. However, when I deployed I get the error below when I hit the Play button in Playground:
{
"error": "Could not connect to websocket endpoint wss://api-such.andsuch.xyz/graphql/. Please check if the endpoint url is correct."
}
…and in my browser console, it says
WebSocket connection to 'wss://api-such.andsuch.xyz/graphql/' failed: Error during WebSocket handshake: Unexpected response code: 400
One thing to note is that the application is dockerized. Could it be from there? I don’t think so because it works locally. Here’s what my docker-compose
file looks like:
version: '3.7'
services:
nginx:
container_name: nginx
image: nginx
restart: always
depends_on:
- web
volumes:
- ./web/dev.nginx.template:/etc/nginx/conf.d/dev.nginx.template
- ./web/static:/static
- ./web/media:/media
ports:
- "8080:80"
networks:
- RIO_NETWORK
command: /bin/bash -c "envsubst \"`env | awk -F = '{printf \" $$%s\", $$1}'`\" < /etc/nginx/conf.d/dev.nginx.template > /etc/nginx/conf.d/default.conf && exec nginx -g 'daemon off;'"
web:
container_name: web
restart: always
build: ./web
networks:
- RIO_NETWORK
depends_on:
- postgres
- redis
volumes:
- ./web:/usr/src/app/
environment:
- SECRET_KEY=enteryoursecretkey
- POSTGRES_DB=postgres
- POSTGRES_USER=postgres
- POSTGRES_PASSWORD=postgres
- POSTGRES_HOST=postgres
- POSTGRES_PORT=5432
- REDIS_HOST=redis
- REDIS_PORT=6379
- TWILIO_ACCOUNT_SID=AC3c9e65abfaba8f446f6c6b3ad7553752
- TWILIO_AUTH_TOKEN=0e66ca6bfe00e72542beb5fbf9f747f3
- GBN_USERNAME=smsleak
- GBN_PASSWORD=smsleak
- DEBUG=True
- MAILJET_API_KEY=97feac351b0184555c3cbb6374671c52
- MAILJET_SECRET_KEY=913d594e24564d6c37c2faa2acf4740e
- GRAPHQL_ENDPOINT=https://api-rio-dev.cnpro.xyz/graphql/
command: bash -c /start.sh
postgres:
container_name: postgres
restart: always
image: postgres:latest
networks:
- RIO_NETWORK
volumes:
- pgdata:/var/lib/postgresql/data/
redis:
container_name: redis
restart: always
image: redis:latest
networks:
- RIO_NETWORK
ports:
- "6379:6379"
volumes:
- redisdata:/data
volumes:
pgdata:
redisdata:
networks:
RIO_NETWORK:
name: RIO_NETWORK
driver: bridge
settings.py
...
...
CHANNEL_LAYERS = {
'default': {
'BACKEND': 'channels_redis.core.RedisChannelLayer',
'CONFIG': {
'hosts': [(os.getenv('REDIS_HOST', 'redis'), os.getenv('REDIS_PORT', 6379))],
}
}
}
...
...
urls.py
...
...
from graphql_playground.views import GraphQLPlaygroundView
urlpatterns = [
path('admin/', admin.site.urls),
path('playground/', GraphQLPlaygroundView.as_view(
endpoint=os.getenv('GRAPHQL_ENDPOINT'))),
]
...
nginx
server {
client_max_body_size 10M;
listen 443 ssl;
listen [::]:443 ssl;
server_name api-such.andsuch.xyz;
ssl_certificate /etc/ssl/certs/andsuch.xyz.pem;
ssl_certificate_key /etc/ssl/certs/andsuch.xyz.key;
location = /favicon.ico { access_log off; log_not_found off; }
location / {
proxy_set_header Host $http_host;
proxy_http_version 1.1;
proxy_set_header Upgrade $http_upgrade;
proxy_set_header Connection ‘upgrade’;
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_set_header X-Forwarded-Proto $scheme;
proxy_pass http://0.0.0.0:8080;
}
}
What could be wrong? I’m outta ideas. Thanks!
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After going through lots of articles, I discovered this one, and this section made me realize the only thing that was wrong was the fact that I didn’t expose port 8000 internally to other docker services. In my
docker-compose
file, the web service was supposed to have…… in it. I added that and it was solved. Thanks for all the assistance @audebertc @niloteixeira
Change the
settings.py
DEBUG to True, then Django should give you more information regarding the bad request. In my case it was an incorrect ALLOWED_HOSTS insettings.py
that debug mode showed info enough to fix it.you must proxying websocket to pass docker…