Validating rss feed
After clicking the "Validate" button on i Tunes, I got this message from them: "Podcast artwork must be between 1400 x 14 x 3000 pixels, JPG or PNG, in RGB color space, and hosted on a server that allows HTTP head requests." i Tunes does show one of my images, but the image doesn't meet their size requirements.
Currently, I'm using xml_domit_rss as the parser but I'm unsure if it's actually validating the URL before parsing.
From what I can gather online, it looks as if validating is separate from the parse, either by using a service (feedvalidator.org) or some other method (parse_url()).
Redland RSS 1.0 Validator - Enter the address of an RSS 1.0 feed into the following form and it will be validated and formatted for display.
RSS 1.0 Validator - This prototype is based around a Schematron schema for validating RSS 1.0 by Leigh Dodds. rss2html RSS to html script to display RSS on a website.
Unfortunately the XML parser used by this code seems to be unfortunately dead and I can't find any detail how strict or lax it is in its parsing...