Communication between Varnish and the Backend

[Hugues Alary]

Thank you Per!

On Mon, Mar 19, 2012 at 11:25 PM, Per Buer <perbu at varnish-software.com>wrote:

> On Fri, Mar 16, 2012 at 11:42 PM, Hugues Alary <hugues.alary at gmail.com>wrote:
> (..)
>
>>
>>    - I was wondering if communicating with varnish via HTTP header is a
>>    good solution?
>>
>> Yes.
>
>>
>>    - How bad can it be performance wise?
>>
>> Negligible.
>
>
>>
>>    - Should I be worried about security (interception/modification of
>>    the communication between Varnish and the backend), even if no credential
>>    will never be sent through HTTP headers? (Also, currently Varnish and the
>>    backend are on the same machine, but chances are that they will in the
>>    future not live on the same host).
>>
>>
> It's more or less impossible to turn Varnish into an open proxy so I
> wouldn't worry about that.
>
>
>>
>>
>> In the future, I plan on instructing varnish not to cache certain pages
>> containing user defined query strings. I want the user to be able to
>> specify these un-cachable urls query strings directly in the application.
>> The application will then send the un-cachable query strings in a header
>> X-Application-QueryStringNoCache: "querystring1,querystring2,...".
>>
>> Is that a bad idea?
>>
>
> No. If it works for you then go for it.
>
>
> --
> Per Buer, CEO
> Phone: +47 21 98 92 61 / Mobile: +47 958 39 117 / Skype: per.buer
> *Varnish makes websites fly!*
> Whitepapers <http://www.varnish-software.com/whitepapers> | Video<http://www.youtube.com/watch?v=x7t2Sp174eI> |
> Twitter <https://twitter.com/varnishsoftware>
>
>
>


-- 
Hugues ALARY
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://www.varnish-cache.org/lists/pipermail/varnish-misc/attachments/20120320/a045a0df/attachment.html>