pub fn discover_feed(site_html: &str, base: Option<&Url>) -> Option<Url>Expand description
Discover a feed URL from a site’s HTML via
<link rel="alternate" type="application/rss+xml|atom+xml" href="…">.
Returns the first RSS/Atom autodiscovery link found, resolved against the
page URL if the href is relative. This is what lets a user paste a site
URL and have FeatherReader find the actual feed (“subscribe by URL”).
Returns None if the HTML carries no autodiscovery link.
The base is the URL the HTML was fetched from, used to resolve relative
hrefs. Pass None to only accept absolute hrefs.