To get the content of wikipedia pages you should be using WikiProxy http://meta.wikimedia.org/wiki/User:Duesentrieb/WikiProxy
Does this tool purge automatically? Is there any manual for that tool?
That page is all ther eis in terms of a manual. But the interface it quite simple. Anyway, it's not for loading HTML at all -- it's for loading WikiText. And it will require a special token if you want to use it from anywhere but the toolserver itself.
-- daniel