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------- Additional Comments From [EMAIL PROTECTED]  2007-04-22 09:38 -------
This is actually something I thought about a couple of months ago, without
seeing this bug. Then I saw this bug, and since other people also seems to want
this functionality, I might look into making such functionality.

For my part, this functionality would be useful in two aspects. Mainly, it would
mean that the sampling when ticking on "download images" would be more accurate.
But it would also be useful to check that the "caching headers" sent by the web
servers are correct, i.e. to check that clients actually uses the cached 
version.

My main concern is how complex and fancy this functionality should be made.
First there is the logic to store the caching headers and information received
for each request, so it can be used in subsequent caches. I've written some code
for that.
Then the http samplers need to use the caching information, to send HTTP HEAD
requests and so on, to check with the server if the cache is still valid and so
on. I haven't looked into this now.
Finally, if the test plan contains "assertions" that work on the response, it
means that the sample must get the sample response data that was cached.

For the GUI part, I' thinking about options like "Max memory size for cache" and
"Max disk size for cache", to emulate both memory and disk browser cache.

I write this comment now, because I noticed on the mailing list, that the
priority was changed from P3 to P2, so I see there is some interest at the 
moment.
It would be nice if other people could tell what functionality they need at a
minimum, and what functionality could be fancy / nice to have.

I think this bug is one of the few remaining "big items" for new functionality
that is missing in JMeter, with regards to web page testing.

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