[squid-users] refresh_pattern and "?"

[Vincent Tamet]

You are totally right !
The problem was on my side with the acl regular expression used to choose
extensions to be cached:
acl images url_regex -i \.(bmp|gif|ico|jpeg|jpg|png|svg|tif|tiff|webp)$
$ was not matching for '?query-string'

* Your answer helps me to find my error.
* And I am now thinking about changing the way of doing the cache
  (a special refresh for my acls or/and a default to 0 0% 0 to use the
TCP_REFRESH_UNMODIFIED).

Thank you very much :)
And sorry for the sound ! :(


On Tue, Jul 13, 2021 at 8:23 PM <squid3 at treenet.co.nz> wrote:

> On 2021-07-13 05:59, Vincent Tamet wrote:
> > Hi,
> >
> > I would like to know how to deactivate the "?" refresh_pattern filter
> > ?
>
> There is no such filter. So "deactivate" has no meaning.
>
> refresh_pattern is a directive that provides default values for the
> caching Freshness heuristics defined by RFC 7234. For messages without a
> necessary cache-control or related header value.
>
>
> > (As most web pages nowaday should use cache-control or expire, I guess
> > the correct usage of headers should be enough to permit us to cache
> > requests with "?" !?
>
> Yes. URLs containing '?query-string' are cached by Squid with the
> default squid.conf refresh_pattern settings.
>
> The refresh_pattern line you noticed is to cope with servers that are
> very old and/or broken. You can remove it, but any of your clients
> visiting such a server will see the brokenness and probably blame Squid
> because "it works fine with just Browser X".
>
>
> Amos
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