Module network_utils 

Functions

base_domain_from_host

Get the base “site” domain from a host.

base_domain_from_url

host_and_rest

Returns (host_without_port, rest_starting_at_/ ? # or empty) Robust: handles protocol-relative, userinfo, IPv6 literals, ports.

host_is_subdomain_of

Host matches base if host == base OR host ends with “.{base}” (case-insensitive), with a required dot boundary to prevent “evil-logrocket.com” matching “logrocket.com”.

rel_for_ignore_script

Given a base domain (already computed) and a URL, returns the “relative” path for same-site/subdomain URLs, otherwise returns the original URL.