Hi,
Relevant documentation:
- https://varnish-cache.org/docs/trunk/users-guide/vcl-hashing.html
- https://www.varnish-software.com/developers/tutorials/varnish-builtin-vcl/
- https://varnish-cache.org/docs/trunk/users-guide/vcl-built-in-code.html
Essentially: if you don't use a return statement,
Hello Guillaume,
Thanks for the update!
(It's done by default if you don't have a vcl_hash section in your VCL)
We can tweak it slightly so that we ignore the whole querystring:
sub vcl_hash {
hash_data(regsub(req.url, "\?.*",""));
if (req.http.host) {
Hi all,
Turns out install-vmod works, just needed to grab the right tarballs and
have the right dependencies installed. Here's the Dockerfile I used:
FROM varnish:7.3
USER root
RUN set -e; \
EXTRA_DEPS="autoconf-archive libossp-uuid-dev"; \
apt-get update; \
apt-get -y install
Thanks for the prompt response!
Thanks & Regards
Uday Kumar
On Thu, Jun 1, 2023 at 11:12 AM Guillaume Quintard <
guillaume.quint...@gmail.com> wrote:
> Thanks, so, to make things clean you are going to need to use a couple of
> vmods, which means being able to compile them first:
> -
On 6/1/23 03:47, Uday Kumar wrote:
Our Requirements:
[...]
3. Allowed Characters are Alphanumeric which are *URL safe* [can be
lowercase, uppercase in case of alphabets]
[...]
This time you didn't mention a requirement of exactly 20 characters. If
that's not strictly required, it's worth
Thanks, so, to make things clean you are going to need to use a couple of
vmods, which means being able to compile them first:
- https://github.com/otto-de/libvmod-uuid as Geoff offered
- https://github.com/Dridi/libvmod-querystring that will allow easy
manipulation of the querystring
On 5/31/23 20:06, Uday Kumar wrote:
We would like to configure varnish to create unique parameter such that
its value should be of 20 characters (alphanumeric characters that are
URL safe).
I have used VMOD uuid to set unique values in each request:
https://github.com/otto-de/libvmod-uuid
Does it need to be unique? can't we just get away with
""?
the crude VCL code would look like:
set req.url = regsub(req.url, "\?.*","?yourparam=");
i.e. getting rid of the whole query string and just putting yours in place.
--
Guillaume Quintard
On
Hello,
We would like to configure varnish to create unique parameter such that its
value should be of 20 characters (alphanumeric characters that are URL
safe).
On Wed, May 31, 2023, 13:34 Guillaume Quintard
wrote:
> > Could you please also suggest how to configure Varnish so that Varnish
>
> Could you please also suggest how to configure Varnish so that Varnish
can add Unique Parameter by itself??
We'd need more context, is there any kind of check that tomcat does on this
parameter, does it need to have a specific length, or match a regex?
If we know that, we can have Varnish
Hello Guillaume,
Thank you so much for your help, will try modifying vcl_hash as suggested!
> Last note: it would probably be better if the tomcat server didn't need
> that unique parameter, or at the very least, if Varnish could just add it
> itself rather than relying on client information as
Hi Uday,
Ultimately, you'll probably want to learn and use this vmod:
https://github.com/Dridi/libvmod-querystring , but in the meantime, we can
use a quick hack.
Essentially, we don't need to modify the URL, but we can just alter the
cache key computation.
By default, the key logic looks like
Hello everyone,
In our system, we're currently using Varnish Cache in front of our Tomcat
Server for caching content.
As part of our new requirement, we've started passing a unique parameter
with every URL. The addition of this unique parameter in each request is
causing a cache miss, as Varnish
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