Feed::Find->find($uri)
Given a URI $uri, use a variety of techniques to find the feeds associated with that page. If $uri itself
points to a feed (i.e., if the Content-Type of the response is a recognized feed type), returns $uri.
Returns a list of feed URIs.
The following techniques are used:
1. <link> tag auto-discovery
If the page contains any <link> tags in the <head> section, these tags are examined for recognized
feed content types. The following content types are treated as feeds: application/x.atom+xml,
application/atom+xml, application/xml, text/xml, application/rss+xml, and application/rdf+xml.
2. Scanning <a> tags
If the page does not contain any known <link> tags, the page is then scanned for <a> tags for links
to URIs with certain file extensions. The following extensions are treated as feeds: .rss, .xml, and
.rdf.
Note that this technique is employed only if the first technique returns no results.
Feed::Find->find_in_html(\$html[,$base_uri])
Given a reference to a string $html containing an HTML page, uses the same techniques as described above
in find to find the feeds associated with that page.
If you know the URI of the page, you should provide it in $base_uri, so that relative links can be
properly made absolute. Feed::Find will attempt to determine the correct base URI, but unless that URI is
specified in the HTML itself (in a "<meta>" tag), you'll need to supply it yourself.
Returns a list of feed URIs.
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