I have many websockify backends to which I get the address to from redis, so node is necessary. the problem is that I can’t get the Websocket connection to stay alive.

I am using express for the web server, and I tried using express-http-proxy, setting-up the proxy inside an “app.post” block after retrieving the address from redis and redirecting the user to it.

It almost works, but when the websockify webpage requests the websocket (wss://<my-domain>/novnc/websockify?token=userToken1:5901) the connection is established but is closed immediately:
websockify log

I am very new to node so I’m pretty lost, any help is appreciated.
here’s the app.post code snippet:

app.post('/job', (req, res) => {
    const job = req.query['jobID'];
    const token = req.query['userToken'];
    try {
        redisGetItem(job).then(function(response) {
            if (!response) { // check if the response is empty
                console.error('key not found:', job);
                return res.status(404).send('key not found');
            } 
            var [addr, port] = response.split(':');


            app.use('/websockify', proxy(`${addr}:${websockify_port}`, {https: true}))
            
            app.use('/novnc', proxy(`${addr}:${websockify_port}`, {
                https: true,
                proxyReqPathResolver: (req) => {
                    return '/novnc'+req.url;
                }, // websocket is instantly killed..
                
            }));

            res.redirect(`websockify/vnc.html?path=novnc/websockify?token=${token}:${port}`);
});
    } catch (err) {
        console.error("Error:", err);
        res.status(500).send("error retrieving key:", err);
    }
});

note: I implemented redisGetItem(key) and it works.