Решение:
map "$http_via" $noCDN {
default 1;
"~.*\.edge\.worldcdn\.net" 0;
}
server {
listen 0.0.0.0:80;
server_name example.com;
if ($noCDN) {
return 301 $scheme://www.example.com$request_uri;
}
}
Posted at Nginx Forum: https://forum.nginx.org/read.php?21,263615,263622#msg-263622