I'm looking into writing a proxy aggregator for feeds, where a handful of users specify a feed URL and some set of conditions, and the system outputs a continually-updated RSS/Atom feed of entries that match those conditions.
Are there best practices for feed aggregators? (Or filtering feed proxies?)
For example:
- Are there certain feed elements that should or shouldn't be modified be proxies?
- How should a feed proxy/parser indicate that it's not passing along a pristine copy of the original feed?
- Does it make sense to delegate the work of downloading/updating to a third party aggregator platform, e.g. the Google Feed API? I presume that'll save a lot of work, vs. having to do updates, 301 handling, etc. by myself.
Thanks for your help.
