[varnish] Re: Varnish Serves only uncompressed objects if they are requested first

[Ricardo Newbery]

Your app server should set the Vary on *all* responses if *any*  
response can vary.

Ric



On Dec 4, 2008, at 11:59 AM, Jeff Anderson wrote:

> Our app servers are sending the Vary on the Accept-Encoding when
> compression is requested.  If compression is not requested they do not
> perform the Vary.  Does that mean we should find a way to send a Vary:
> Accept-Encoding:  null,gzip,deflate or something?  Is there a 'no
> compression' accept-encoding header?
>
>
> On Dec 2, 2008, at 10:36 PM, Per Buer wrote:
>
>> Jeff Anderson skrev:
>>> It looks like if the first requested page is for an uncompressed  
>>> page
>>> varnish will only deliver the uncompressed page from cache even if a
>>> compressed page is requested.
>>
>> As long as you don't Vary: on the Accept-Encoding I guess that is
>> expected. Varnish doesn't not understand the Accept-Encoding header.
>>
>>> (..)
>>> What could be causing this?  The only way to fix appears to be to  
>>> add
>>> the lines below:
>>>
>>> sub vcl_hash {
>>> if (req.http.Accept-Encoding ~ "gzip" || req.http.Accept-Encoding ~
>>> "deflate") {
>>>  set req.hash += req.http.Accept-Encoding;
>>> }
>>
>> Either use the fix you suggested or add a Vary: Accept-Encoding on  
>> the
>> backend.
>>
>> -- 
>> Per Buer - Leder Infrastruktur og Drift - Redpill Linpro
>> Telefon: 21 54 41 21 - Mobil: 958 39 117
>> http://linpro.no/ | http://redpill.se/
>>
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