From: Henrik Nordstrom <>
Date: Thu, 18 Jul 1996 15:57:39 +0200

> And how does one distinguish an If-Modified-Since request from a request that
> would return TCP_HIT?? That is, how come some requests are looking to verify a
> modification time and some are not??

I don't understand you question, but

TCP_IFMODSINCE is logged when squid returns that the object
is not changed with respect to it's cache (that is, the client
cache is up to date with the Squid cache).

A If-Modified-Since request is a GET request, with the additional
header If-Modified-Since. This is a "conditional" get to only get
the object if it is changed.

Henrik Nordstrom
Received on Thu Jul 18 1996 - 06:59:03 MDT

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