Security websocket JS with Python?

Question

Python

Good afternoon!

There is a websocket server in python3 and a client in JS

The usual connection ws://localhost:8765 connects and works on the localhost, but it does not work on a VPS with HTTPS

Server example:

ssl_context = ssl.SSLContext(ssl.PROTOCOL_TLS_SERVER)
ssl_context.load_cert_chain(certfile="/etc/letsencrypt/live/mysite.ru/fullchain.pem", keyfile="/etc/letsencrypt/live/mysite.ru/privkey.pem")

start_server = websockets.serve(server.ws_handler, 'localhost', 8765, ssl=ssl_context)

I also tried self-signed certificates, it doesn't work either

localhost_pem = Path(__file__ + "/../ssl/certificate.pem").resolve()
localhost_key = Path(__file__ + "/../ssl/key.pem").resolve()

Everything is simple in JS

socket = new WebSocket("wss://"+location.host+":8765");

The server starts and runs without errors, but the client does not connect
Returns code: 1006

Answer 1

I'm certainly not an expert, but it's logical to assume

start_server = websockets.serve(server.ws_handler, 'localhost', 8765, ssl=ssl_context)

that you cannot connect to localhost from outside, try replacing localhost with 0.0.0.0
PS: Either proxy requests to localhost using the same Nginx