Nginx using uninitialized "subdomain" variable

Install & Config
#1

Hi,

I use installed a fresh jitsi-meet. In my nginx error log with connect I get the following waring:

2020/04/07 22:03:57 [warn] 6503#6503: *1 using uninitialized "subdomain" variable while sending response to client, client: 129.xxx.xxx.xxx, server:jitsi.mydomain.de, request: "GET / HTTP/1.1", subrequest: "/config.js", host: "jitsi.mydmain.de"

nginx config generated by jitsi package:

server {
    listen 443 ssl;
    listen [::]:443 ssl;
    server_name jitsi.mydomain.de;

    ssl_protocols TLSv1 TLSv1.1 TLSv1.2;
    ssl_prefer_server_ciphers on;
    ssl_ciphers "EECDH+ECDSA+AESGCM:EECDH+aRSA+AESGCM:EECDH+ECDSA+SHA256:EECDH+aRSA+SHA256:EECDH+ECDSA+SHA384:EECDH+ECDSA+SHA256:EECDH+aRSA+
SHA384:EDH+aRSA+AESGCM:EDH+aRSA+SHA256:EDH+aRSA:EECDH:!aNULL:!eNULL:!MEDIUM:!LOW:!3DES:!MD5:!EXP:!PSK:!SRP:!DSS:!RC4:!SEED";

    add_header Strict-Transport-Security "max-age=31536000";

    ssl_certificate /etc/nginx/ssl/jitsi_mydomain_de.crt;
    ssl_certificate_key /etc/nginx/ssl/jitsi_mydomain_de.key;

    root /usr/share/jitsi-meet;

    # ssi on with javascript for multidomain variables in config.js
    ssi on;
    ssi_types application/x-javascript application/javascript;

    index index.html index.htm;
    error_page 404 /static/404.html;

    location = /config.js {
        alias /etc/jitsi/meet/jitsi.mydomain.de-config.js;
    }

    location = /external_api.js {
        alias /usr/share/jitsi-meet/libs/external_api.min.js;
    }

    #ensure all static content can always be found first
    location ~ ^/(libs|css|static|images|fonts|lang|sounds|connection_optimization|.well-known)/(.*)$
    {
        add_header 'Access-Control-Allow-Origin' '*';
        alias /usr/share/jitsi-meet/$1/$2;
    }

    # BOSH
    location = /http-bind {
        proxy_pass      http://localhost:5280/http-bind;
        proxy_set_header X-Forwarded-For $remote_addr;
        proxy_set_header Host $http_host;
    }

    # xmpp websockets
    location = /xmpp-websocket {
        proxy_pass http://127.0.0.1:5280/xmpp-websocket?prefix=$prefix&$args;
        proxy_http_version 1.1;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection "upgrade";
        proxy_set_header Host $http_host;
        tcp_nodelay on;
    }

    location ~ ^/([^/?&:'"]+)$ {
        try_files $uri @root_path;
    }

    location @root_path {
        rewrite ^/(.*)$ / break;
    }

    location ~ ^/([^/?&:'"]+)/config.js$
    {
       set $subdomain "$1.";
       set $subdir "$1/";

       alias /etc/jitsi/meet/jitsi.mydomain.de-config.js;
    }

    #Anything that didn't match above, and isn't a real file, assume it's a room name and redirect to /
    location ~ ^/([^/?&:'"]+)/(.*)$ {
        set $subdomain "$1.";
        set $subdir "$1/";
        rewrite ^/([^/?&:'"]+)/(.*)$ /$2;
    }

    # BOSH for subdomains
    location ~ ^/([^/?&:'"]+)/http-bind {
        set $subdomain "$1.";
        set $subdir "$1/";
        set $prefix "$1";

        rewrite ^/(.*)$ /http-bind;
    }

    # websockets for subdomains
    location ~ ^/([^/?&:'"]+)/xmpp-websocket {
        set $subdomain "$1.";
        set $subdir "$1/";
        set $prefix "$1";

        rewrite ^/(.*)$ /xmpp-websocket;
    }
}

What do I need to change to avoid that warning?

Ciao
Marcus

#2

And another thing I’m confused about. My shibboleth locations are not working/catching if the " Anything that didn’t match above, and isn’t a …" location is set, even though it’s after.

    # Shibboleth

    location = /shibauthorizer {
      internal;
      include fastcgi_params;
      fastcgi_pass unix:/var/run/shibboleth/shibauthorizer.sock;
    }

    location /Shibboleth.sso {
      include fastcgi_params;
      fastcgi_pass unix:/var/run/shibboleth/shibresponder.sock;
    }

    location /shibboleth-sp {
      alias /usr/share/shibboleth/;
    }

    # Login location where Jicofo servlet is running

    location /login {
      shib_request_use_headers on;
      more_clear_input_headers 'Variable-*' 'Shib-*' 'Remote-User' 'REMOTE_USER' 'Auth-Type' 'AUTH_TYPE';
      more_clear_input_headers 'displayName' 'mail' 'persistent-id';
      shib_request /shibauthorizer;
      proxy_pass http://127.0.0.1:8888;
    }

    location /_saml/metadata/ { 
        alias /var/www/html/_saml/metadata/;

        ## override content-type ##
        types { } default_type "text/xml;";
    }

    # EOF Shibbolet

[...]

    #Anything that didn't match above, and isn't a real file, assume it's a room name and redirect to /
    ###location ~ ^/([^/?&:'"]+)/(.*)$ {
    ###    set $subdomain "$1.";
    ###    set $subdir "$1/";
    ###    rewrite ^/([^/?&:'"]+)/(.*)$ /$2;
    ###}