Django with Channels 2.1.1 Error During WebSocket handshake 404

[Robert Fox]

I am working on a project using Django and Channels 2.1.1. Everything is
working splendidly on my home PC but when I deploy to AWS I get the error:
'WebSocket connection to 'ws://IP/ws/lobby/' failed: Error during WebSocket
handshake: Unexpected response code: 404 ' which originates from the line
in my HTML where I establish the chat socket :
var chatSocket = new WebSocket(
'ws://' + window.location.host + '/ws/' + roomName + '/'
);
I am using nginx and gunicorn to run my Django application on the host
machine.
When I went to the Channels 2 tutorial it has a section for testing
communication between the channels layer and Redis using the
Django Shell which I tested and works.
My full code can be seen at https://github.com/Rob-Fox/Chat2

Thank you

[Andrew Godwin]

You cannot use gunicorn to run WebSockets or other async code - you need an
ASGI server, like Daphne or uvicorn. Switch to one of those and it should
start working.

Andrew

Post by Robert Fox
I am working on a project using Django and Channels 2.1.1. Everything is
'WebSocket connection to 'ws://IP/ws/lobby/' failed: Error during WebSocket
handshake: Unexpected response code: 404 ' which originates from the line
var chatSocket = new WebSocket(
'ws://' + window.location.host + '/ws/' + roomName + '/'
);
I am using nginx and gunicorn to run my Django application on the host
machine.
When I went to the Channels 2 tutorial it has a section for testing
communication between the channels layer and Redis using the
Django Shell which I tested and works.
My full code can be seen at https://github.com/Rob-Fox/Chat2
Thank you
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[Robert Fox]

Thank you Andrew, I have now configured Nginx to route /ws/ to port 9000
where Daphne is configured. This has fixed my 404 handshake error and now I
have a handshake error 500. Any thoughts?

Post by Andrew Godwin
You cannot use gunicorn to run WebSockets or other async code - you need
an ASGI server, like Daphne or uvicorn. Switch to one of those and it
should start working.
Andrew

[Robert Fox]

I managed to get it working, turns out I forgot to install and configure
Redis. I now have a working web app with channels.

Post by Robert Fox
Thank you Andrew, I have now configured Nginx to route /ws/ to port 9000
where Daphne is configured. This has fixed my 404 handshake error and now I
have a handshake error 500. Any thoughts?

Post by Andrew Godwin
You cannot use gunicorn to run WebSockets or other async code - you need
an ASGI server, like Daphne or uvicorn. Switch to one of those and it
should start working.
Andrew