Modify cache before page loads

[Lydnasty]

Hi,
I want to modify only a part of the html of a page when I consider it's expired and store the result html in cache.
Is there a hook or something to check cached html and edit it before page loads?

Thanks

[soulseekah]

Not at the moment, but pull requests are welcome!

This is where stuff is output: https://github.com/pressjitsu/pj-page-cache-red/blob/master/advanced-cache.php#L196