I need to make a dokuwiki content cachable by an http client. I've searched in the doc. and in the plugin list and found nothing about this behaviour.
Do you know if it exists?
According to the maintainer of DokuWiki in https://www.freelists.org/post/dokuwiki/HTTP-caching-confusion,2, DokuWiki makes use of PHP session to do CSRF prevention and breadcrumbs. Once a page is session dependent, it can no longer be cached by PHP's default header output.
However, You can write a plugin yourself of course.