Filtering ads in RSS feeds?

[sidki3003]

(Jan. 14, 2009 02:41 PM)eclipse Wrote:  Beware of the preview mode, as every feed I tried in firefox and opera DIDN'T display any ads (although they WERE there).

Ahh, i didn't know that Firefox is skipping ads that get displayed in other readers. I don't think that Firefox also has a "preview" and "subscribed" mode. It's simply interpreting RSS docs that way.

I don't use another feed reader besides Firefox, and i'm not intending to do so, unless sidki-config support would force me.

Quote:

Quote:and the source didn't contain any HTML tags.

What about this...
This is part of the source from the preview in opera:

Code:

<p><a href="http://feedads.googleadservices.com/~at/3l_uhy3mKKW_q5qbxEm2bE8WEP8/a"><img src="http://feedads.googleadservices.com/~at/3l_uhy3mKKW_q5qbxEm2bE8WEP8/i" border="0" ismap="true"></img></a></p>

Obviously these aren't HTML tags.

But seriously, i remember now having seen this before, escaped HTML within <description> feed tags, that is.

Anti-ad HTML filters don't catch these. Your XML web filters would need to look for such escaped ads, possibly only within description blocks. One problem is that - at least theoretically - there are many ways to escape HTML code (entities, Hex, Unicode, ...).