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I get a URL from a user. I need to know:
a) is the URL a valid RSS feed?
b) if not is there a valid feed associated with that URL
using PHP/Javascript or something similar
(Ex. http://techcrunch.com fails a), but b) would return their RSS feed)
Found something that I wanted:
Google’s AJAX Feed API has a load feed and lookup feed function (Docs here).
a) Load feed provides the feed (and feed status) in JSON
b) Lookup feed provides the RSS feed for a given URL
Theres also a find feed function that searches for RSS feeds based on a keyword.
Planning to use this with JQuery’s $.getJSON