[squid-users] Squid proxy return gzip responses when I don't include Accept-Encoding

[Bermejo Gil, Alberto (EXT - ES)]

There are something that can I do in the server side in order to prevent this behavior?

I mean, I want to cache different responses, one with gzip and another without gzip.

-----Mensaje original-----
De: squid-users [mailto:squid-users-bounces at lists.squid-cache.org] En nombre de EXT Amos Jeffries
Enviado el: lunes, 29 de febrero de 2016 12:47
Para: squid-users at lists.squid-cache.org
Asunto: Re: [squid-users] Squid proxy return gzip responses when I don't include Accept-Encoding

On 1/03/2016 12:08 a.m., Bermejo Gil, Alberto (EXT - ES) wrote:
> Hi,
> 
> In the squid proxy (3.3.3), if the first request is with the
> Accept-Encoding: gzip header then all the next responses will also be 
> in gzip, whether I request with a specific Accept-Encoding or not.
> 

What you describe is the behaviour that will happen if the server responds with gzip and no Vary header.

That may be intentional on behalf of the server. There are some that try to force 'efficiency' (aka bandwidth saving at any cost) by simply returning gzip.


> I need something special in the squid.conf?
> 
> This is a rule for my domain:
> 
> refresh_pattern ^http://myip.com 60 100% 60 override-expire 
> override-lastmod reload-into-ims ignore-reload ignore-no-cache 
> ignore-private ignore-auth
> 

Your pattern does not help. It forces Squid to cache the objects for a minimum of 1 hour regardless of anything that might be used to correct change or update the cached version (ie locating anything other than the gzip one stored).

With these above settings the Vary header alone will be able to prevent cache oddities like you are seeing.

Amos
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