Why doesn't nginx let me close the websocket?

Question

Python

Friends, colleagues, comrades! - I am writing shit code in python that uses WSS, the application itself uses gevent. Before all this, there is an nginx proxy with the following configuration:

server {
        listen 80;
        listen 443;
        ssl on;
        ssl_certificate /etc/letsencrypt/live/bookforker.tk/fullchain.pem; # managed by Certbot
        ssl_certificate_key /etc/letsencrypt/live/bookforker.tk/privkey.pem; # managed by Certbot

        server_name name.tk www.name.tk;

        access_log  /var/log/nginx/access.log;
        error_log  /var/log/nginx/error.log;

        location / {
                proxy_pass                      https://localhost:5000;
                proxy_redirect                  off;
                proxy_set_header                Host                    $host;
                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;

                # WebSocket support
                proxy_set_header                Upgrade                 $http_upgrade;
                proxy_set_header                Connection              "upgrade";
                proxy_http_version              1.1;
        }
}

Tried different ones, none work properly.
And the problem is that the sockets simply do not close, alas and ah. What could be the reason?

Answer 1

I believe that if you simply pass the "upgrade" constant, then this will be transmitted for all connections, even if there was a connection: close that should have been there originally.