Enable mediawiki mobile frontend.
https://www.mediawiki.org/wiki/Extension:MobileFrontend
It's already installed. Works quite well. Imprint footer links now functional.
https://github.com/varnish/varnish-devicedetect could be the way to go.
https://www.mediawiki.org/wiki/Extension:MobileFrontend#Using_the_mobile_view contains some info on how to make MobileFrontend work with varnish.
This is done. The related varnish vlc snippet:
##########################################################################################
## mediawiki mobile frontend
##########################################################################################
## credits:
## https://github.com/varnish/varnish-devicedetect/blob/master/INSTALL.rst
## transparently adding "?useformat=mobile" to backend requests
## https://www.whonix.org/wiki/Main_Page
## https://www.whonix.org/wiki/Main_Page?useformat=mobile
include "devicedetect.vcl";
sub vcl_recv {
call devicedetect;
}
sub vcl_backend_fetch {
if ( bereq.url == "/wiki/" || bereq.url == "/w" || bereq.url ~ "^/wiki/" || bereq.url ~ "^/w/" ) {
if ( bereq.http.X-UA-Device ~ "^mobile" || bereq.http.X-UA-device ~ "^tablet" ) {
if ( bereq.method == "GET" ) {
set bereq.url = bereq.url + "?useformat=mobile";
}
}
}
}
sub vcl_deliver {
set resp.http.X-UA-Device = req.http.X-UA-Device;
}