Squid Cache Policy Check | web.forret.com

Purpose

This is a tool to compare the HTTP headers of an actual page with a Squid-Cache policy. It will tell you whether the Squid proxy will serve a cached copy or go fech a new source file first.

Document properties

Last-Modified HTTP Header (Optional)
(Object) Date HTTP Header
Expires HTTP Header (Optional)
Current time (Optional)

Client request

Client Max Age: Force no-cache

Squid-Cache policy

MIN_AGE/MAX_AGE parameter: min - max
PERCENT parameter: %
Override: : Expire
: Modification
: No-cache

Calculation
AGE:	0 minutes	(Now - Object Date)
LM_AGE:	0 minutes	(Object Date - Last Modified)
LM_FACTOR:	100 %
RESULT:	FRESH (0 <= 0 )	FRESH: give copy from cache STALE: get new copy from server

Graphical representation

NOW

AGE

MIN_AGE

MAX_AGE

NOW - 1 day

NOW + 1 day