[TYPO3-dev] WARNING!?? tslib_patcher, pp_chashchecker

[Elmar Hinz]

Hello developers,

two extension have been uploaded to TER claiming to "correct bugs related to
the cache hash" and/or to "increase the overall performances of your TYPO3
website".

tslib_patcher and pp_chashchecker


Do this extensions really do what they promise to do or do they make matters
worse?


I am not fully sure, how they work, and there isn't that much documentation.

To me it looks, that they check for a cHash whenever GET parameters are
sent, even if GET parameters are send without a cHash to a USER_INT plugin
by intention. That's the situation of well configured result browser links
of search forms.

In this case, according to my understanding, the check would fail and the
complete page would not be cached but rerendered. That would have the same
effect like sending the harmful "no_cache=1" parameter. The performance of
high frequented search forms would decrease in a dangerous way. 

I am not fully sure about the mechanism. But I warn, not to use this
extensions until there is a positive feedback from side of Michael Stucki
that they really do no harm.

What is your estimation. What do this extensions do? Do we need to send a
warning to the user lists?


Regards

Elmar