SOLVED: websocket requests return "404 Not Found" reply.

[pmc]

bitmap, thanks for the tip.

After some trial and error this is what worked for me.

<Location "/Jellyfin/socket">
        <RequireAll>
                Require ssl
                Require all granted
        </RequireAll>

        SSLRequireSSL

        RequestHeader set X-Forwarded-Proto "https"
        RequestHeader set X-Forwarded-Port "443"

        RewriteEngine On
        RewriteCond %{HTTP:Upgrade} =websocket
        RewriteRule /(.*) ws://localhost:8096/Jellyfin/socket/$1 [P]

</Location>

<Location "/Jellyfin">
        <RequireAll>
                Require ssl
                Require all granted
        </RequireAll>

        SSLRequireSSL

        ProxyPass "http://localhost:8096/Jellyfin"
        ProxyPassReverse "http://localhost:8096/Jellyfin"
</Location>

This worked on Apache/2.4.62 (Unix) on GNU/Linux.