Django: failed: Error during WebSocket handshake - django

Question

I'm getting below error
WebSocket connection to 'ws://localhost/ws/testNoti?subscribe-broadcast&publish-broadcast&echo' failed: Error during WebSocket handshake: Unexpected response code: 500
Websocket connection is broken!
supervisor conf file
[unix_http_server]
username = ubuntu
password = password
[program:uwsgi]
command=/home/ubuntu/bxd-life/venv/bin/uwsgi --ini /home/ubuntu/bxd-life/bxd/bxd.ini
autostart=true
user=ubuntu
autorestart=true
stderr_logfile = /home/ubuntu/bxd-life/logs/err.log
stdout_logfile = /home/ubuntu/bxd-life/logs/out.log
stopsignal=INT
[program:uwsgi_ws]
command = /home/ubuntu/bxd-life/venv/bin/uwsgi --http :8080 --gevent 1000 --http-websockets --workers=2 --master --module bxd.wsgi_websockets
#directory=/home/ubuntu/bxd-life/bxd
autostart=true
autorestart=true
starttries=5
user=ubuntu
environment=DJANGO_SETTINGS_MODULE='bxd.settings'
nginx conf file
upstream app_server {
server localhost:8000;
}
upstream web_socket_server {
server localhost:8080 fail_timeout=0;
}
server {
listen 80;
server_name _;
location /static/ {
alias /home/ubuntu/bxd-life/bxd/static/;
expires 30d;
}
location /ws/ {
proxy_pass http://web_socket_server;
proxy_http_version 1.1;
#proxy_redirect ws://$server_name;
proxy_set_header Upgrade $http_upgrade;
proxy_set_header Connection "upgrade";
proxy_set_header Host $host;
}
location / {
try_files $uri #proxy_to_app;
}
location #proxy_to_app {
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_set_header Host $http_host;
proxy_redirect off;
proxy_pass http://app_server;
}
}
}
wsgi_websockets.py
import os
import gevent.socket
import redis.connection
redis.connection.socket = gevent.socket
os.environ.setdefault("DJANGO_SETTINGS_MODULE", "bxd.settings")
from ws4redis.uwsgi_runserver import uWSGIWebsocketServer
application = uWSGIWebsocketServer()
The above is working fine with ./manage.py runserver but not with nginx!
Any help would be very much appreciated.