Rails - Nov 2008 - Catching non-RSS/Atom feeds when using Feed-Normalizer

A production app is using FeedNormalizer in an rss daemon. The worker
opens a ''Source'' (the apps naming convention for an RSS feed),
parses it
using FeedNormalizer, and does the business on the items in the feed;

feed = FeedNormalizer::FeedNormalizer.parse open(source.rss_url)

A beta tester added a URL, rather than an RSS/Atom URL, and the worker
choked (on screen prompts have since been cleared up, but that''s not
enough). I see two options, but I don''t know how to implement either;

1) Validate against anything that isn''t RSS/Atom, or one of the
recognised ''feed'' formats which we can parse using
feednormalizer

Or, the better option from a usability perspective,

2) The RSS worker catches any errors when FeedNormalizer tries to open
the source.rss_url, and, if it isn''t an RSS URL, tries to find any RSS
feed associated with the ''source.rss_url'' the user provided.

I''m happy to go with the first option (as a stop-gap) if someone knows
of a regex which can be used to validate against a non-feed url (my
limited experience with rss formats suggests this is unlikely). If you
think I should go with the second option, I can probably work out how to
catch the errors from FN but it would be great to know if anyone has a
snippet for taking a URL and attempting to find a feed on it. Any
suggestions?
-- 
Posted via http://www.ruby-forum.com/.

--~--~---------~--~----~------------~-------~--~----~
You received this message because you are subscribed to the Google Groups
"Ruby on Rails: Talk" group.
To post to this group, send email to
rubyonrails-talk-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org
To unsubscribe from this group, send email to
rubyonrails-talk+unsubscribe-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org
For more options, visit this group at
http://groups.google.com/group/rubyonrails-talk?hl=en
-~----------~----~----~----~------~----~------~--~---

No thoughts on this one?
-- 
Posted via http://www.ruby-forum.com/.

--~--~---------~--~----~------------~-------~--~----~
You received this message because you are subscribed to the Google Groups
"Ruby on Rails: Talk" group.
To post to this group, send email to
rubyonrails-talk-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org
To unsubscribe from this group, send email to
rubyonrails-talk+unsubscribe-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org
For more options, visit this group at
http://groups.google.com/group/rubyonrails-talk?hl=en
-~----------~----~----~----~------~----~------~--~---