On 03/16/2011 02:58 PM, Chris Bloom wrote:
I have been investigating an issue on a client's website that is very
peculiar. I have verified that the behavior is due to the instance of
Varnish that Rackspace configured for us. However, I'm not sure if this
constitutes a bug in Varnish or a configuration error. I'm hoping
someone can verify it for me one way or the other.
Here is the scenario: Some of our PHP pages are protected by way of
verifying that certain session variables are set. If not, the user is
sent to the login page. We have observed that on URLs in which there is
a querystring, and when the last value of that querystring ends in
".jpg", ".jpeg", ".gif", or ".png", and when we have an iptable rule
that routes requests from port 80 to Varnish, the session is reset
completely. Oddly enough, no other extension seems to have this affect.
This *looks* like some general Varnish rule that removes any (session)
cookies when the URL (including the query string) ends with jpg, jpeg
etc. However, since you did not include the Varnish configuration or
Varnish logs, you will only receive guesswork.
Your test file is of absolutely no value as long as you didn't
a) provide the real URL for remote diagnosis and/or
b) the VCL for local testing.
Without any information on the Varnish configuration, further requests
for assistance should be directed to your provider. You need someone
with access to the VCL to be able to confirm your issue. The symptoms
should be sufficiently descriptive, as long as they reach someone who
can do anything about it. We can't.
Good luck,
--
Bjørn
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