sidki's config set: 2005-06-09

[sidki3003]

Hi Mike,

Very interesting! Thanks for the helpful explanations. It will take me some time to get familiar with these filters.

The added filters are just now active for both options, "Always Cache" and "Always Cache except for HTML", but they aren't needed for the first option, right?


A few more questions to get me started:

Did you check if servers that don't send a Last-Modified actually accept an If-Modified-Since?

Along the same line, i would feel a bit uncomfortable with removing all non-html ETags. What's with servers that base their responses on just this header? Or doesn't this happen? Hmm... just had an idea, see below.

Excluding local.ptron: Shouldn't it just get the "i_cache:2" (always cache) keyword?

Re "Cache-Control: 3 Kill if 3xx Response", there was a reason why i added that, but i can't remember which. Do you remember a situation where not killing it for 304s helped? Hmm... maybe i did it because the counter was always reset to 86400 and i never got a fresh copy... gonna check that.

Out of curiousity, what does "hvINM" stand for?


When hitting back to http://www.pcworld.com/ from another page i still get this:

Code:

RESP 6001 : Last-Modified added
RESP 6001 : Time: 17:08:38::335

+++RESP 6001+++
HTTP/1.1 200 OK
Server: Microsoft-IIS/5.0
Content-Type: image/gif; PrxMsg=Fixed acc. to File Extension: text/html
Content-Length: 70
Date: Mon, 09 May 2005 15:08:38 GMT
Connection: keep-alive
!URL-ID: http://images.pcworld.com/shared/graphics/tabs/new/toolshover.gif
Cache-Control: max-age=1
ETag: prxETag2
Last-Modified: Mon, 09 May 2005 15:08:38 GMT

Maybe it's because those "images" are ASCII files and Firefox doesn't like to send an If-None-Match for them, dunno.


Re using the ETag field as a var stored by the browser, how about making an "array" (a la keyword/flag/volat) out of it? The first field would be the original ETag, if present. All others would get a "prx-" prefix and are stripped on the way out while going thru Prox. That way the old ETag stays intact, and we would have a nice spot for future purposes.

Later,
sidki