Disable hotlinking for a specific list of sites in nginx?

Question

Nginx

The standard scheme for banning hotlinking is known - (forbidden for everyone except search engines and social networks). I also need to configure the config to prohibit only a specific list from several domains. Those. everyone, except for a few specified domains, is allowed to hotlink. Please share the code

Answer 1

if ($http_referer ~* "^https?://(site1\.ru|site2\.com|site3\.org)") {
    return 403;
}

Or

valid_referers ~^(?!site1\.ru|site2\.com|site3\.org);

if ($invalid_referer) {
    return 403;
}

Answer 2

An example of preventing hotlinking with nginx