There is no >60 need on the 301. Just me suggesting that 60sec is too short caching time for a _permanent_ thing.
There is - may be some misconfiguration in my squid.conf.
If I set max-age to values from interval <1;60> only 302 and 307 redirects were cached (HIT) and no 301. When I increased the max-age value to 61 then the 301 redirect was cached too.
But you are right, that the cause of no-caching the 301 redirect is the min value of:
refresh_pattern . 0 20% 4320
But for redirects 302 and 307 the above-mentioned refresh_pattern is ignored.
My source server is Apache and the corresponding configuration is:
RewriteRule /img301.jpg /img.svg [R=301,L,E=rcache:1]
RewriteRule /img302.jpg /img.svg [R=302,L,E=rcache:1]
RewriteRule /img307.jpg /img.svg [R=307,L,E=rcache:1]
Header always set Cache-Control "max-age=3" env=rcache
RewriteRule /img307.jpg /img.svg [R=307,L,E=rcache:1]
Header always set Cache-Control "max-age=3" env=rcache
zigi
On Thu, Sep 21, 2017 at 2:24 PM, Amos Jeffries <squid3@xxxxxxxxxxxxx> wrote:
On 21/09/17 22:16, kAja Ziegler wrote:
Thats what the "must-revalidate" means. It should work better with
just max-age or Expires header - and with a longer value than 60 sec
since this is supposed to be a *permanent* situation.
As I know "must-revalidate" mean "refuse to return stale responses to the user even if they say that stale responses are acceptable" - cached object must be revalidated.
Max-age=60 was only used for testing.
The results of my testing:
- redirect 302 or 307 - to be cached needs Cache-Control max-age > 0 or Expires "access plus 1 seconds"
- redirect 301 - to be cached needs Cache-Control max-age > 60 or Expires "access plus 61 seconds"
There is no >60 need on the 301. Just me suggesting that 60sec is too short caching time for a _permanent_ thing.
This is strange because I thought that 301 is always cached without Cache-Control or Expires headers. And I can't find any information in the documentation which describes such behaviour.
It should be, so long as it is fresh so that means it does depend on refresh_pattern saying it is fresh when no controls are present.
Amos
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