[TYPO3-dev] Caching extension output without the cHash parameter

[John de Stigter]

Hi there,

I am working on an extension with GET vars like tt_news that I want to
be cached by TYPO3. I've read the article about the cHash parameter and
this all works great, but I don't like the cHash value in my url's.

To make this possible I have added some code to the function
"makeCacheHash()" in the class "tslib_fe". What I do is I check if any
$_GET variables are set that belong to my extension. If so, than I unset
the $GET variable that is passed over and fill it up again with only the
page id and the variables that belong to my extension. After this I
calculate the cHash of my rebuilt $GET and set $this->cHash to that
value.

This will enable indexing of the extension output and also cache the
page without having that ugly :D cHash parameter in my url's.

I tried to add this solution with the availble "tslib_fe-PostProc" hook,
but since I am also using RealURL, my GET variables are not set at this
point yet.

As far as I have tested this the above solution does not open up a
threat as mentioned in the article about cHash, but if anyone thinks it
could, please post it or mail me.

I am also wondering if this functionality could be included in the core
of TYPO3. I am aware it could slow down the page rendering process, but
in case you have a heavy extension and you want to exclude the cHash
paramter from your url's it improves your website.

You can find the manipulated function in the attachement.

Article on cHash:
http://typo3.org/development/articles/the-mysteries-of-chash/page/1/

 <<function.txt>> 
Cheerios,
John

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