[squid-users] refresh_pattern and "?"

[squid3 at treenet.co.nz]

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