id	summary	reporter	owner	description	type	status	priority	milestone	component	version	severity	resolution	keywords	cc
19890	Filter auto enclosure links before processing	niallkennedy		"[http://core.trac.wordpress.org/browser/tags/3.3.1/wp-includes/functions.php#L1182 The do_enclose() function] looks through post content for enclosure-worthy URLs, requests the URLs it finds, and stores in post meta.

I use sample code and dummy URLs in my posts: e.g. !http://example.com/song.mp3. Right now `do_enclose()` finds the mention of the MP3, adds it to post meta, which later outputs in `rss_enclosure()` or `atom_enclosure()`. If I want to remove the enclosure from final markup I can attach to the `added_postmeta` action to remove a value after it was requested and inserted or act on the markup generated by `rss_enclosure()` or `atom_enclosure()` by emptying the string.

I would like to filter out the auto-discovered enclosure link before it is processed by !WordPress, looked up in the database, and HEAD requested. If a filter existed on the parsed enclosure links I could remove links from dummy domains such as ""example.com."""	enhancement	new	normal	Awaiting Review	Feeds		minor		has-patch