Varnish 3.0.1 Backend conditional requests

Jocelyn De La Rosa jocelyn.delarosa at
Mon Jan 9 11:55:09 CET 2012

On 01/06/2012 03:52 PM, Hugo Cisneiros (Eitch) wrote:
> 2012/1/6 Tollef Fog Heen<tfheen at>:
>>> Hello. How to enable Backend conditional requests (If-None-Match and
>>> If-Modified-Since) for the Varnish 3.0.1. Now it doesn't send to me
>>> headers (If-None-Match and If-Modified-Since) when max-age=0 or
>>> expired, on first response i set ETag and Last-Modified headers. Subs
>>> and stale_obj from
>>> throw exception in "*.vcl" file when compile.
>> As it says on that wiki page: it's a proposed feature, it's not yet
>> incorporated.
> By the way, I have tested the experimental-ims branch which contains
> the feature and it's working nice! :)
Hi,I have also tested the experimental-ims branch and it's working great!
Are there any (hidden) bugs that prevent its use in production mode?

We are very interested by this feature, so if some work is needed we could
do it.

Jocelyn De La Rosa
Smartjog - Developer - Research&  Engineering

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