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An example vmod for Varnish
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Latest commit a639c4f Nov 18, 2014 @mpguerra mpguerra Merge pull request #12 from 3scale/fix-get-string-between-delimiters
vmod_threescale: fix function to get substring between delimiters
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README

INSTALL:
========

The source tree is based on autotools to configure the building, and
does also have the necessary bits in place to do functional unit tests
using the varnishtest tool.

Prerequisites:

- Varnish source - version 3.0.3 or previous
- libpcre3-dev
- libtool

Usage:

./autogen.sh
./configure VARNISHSRC=DIR [VMODDIR=DIR]

VARNISHSRC is the directory of the Varnish source tree for which to
compile your vmod. Both the VARNISHSRC and VARNISHSRC/include
will be added to the include search paths for your module.

Optionally you can also set the vmod install directory by adding
VMODDIR=DIR (defaults to the pkg-config discovered directory from your
Varnish installation).

Make targets:

make - builds the vmod
make install - installs your vmod in VMODDIR

if VMODDIR is not on the user space do 'sudo make install' instead

On your VCL configuration: 

import threescale;

set req.http.X-tmp = threescale.send_get_request_threaded("su1.3scale.net","80",req.url,"");
set req.http.X-tmp = threescale.send_get_request("su1.3scale.net","80",req.url,"X-url-header: true;");


Integration modes:

Use the appropriate VCL configuration file for the integration mode you would like to follow.

vcl/default_3scale_simple.vcl - Varnish as a cache middleware between your API backend and the 3scale service.
vcl/default_3scale_with_proxy.vcl - Varnish as an API proxy between API consumers and your API endpoints. In this setup, Varnish will be fully in charge of the integration with the 3scale service.

Replace the default config file with one of the above:

sudo mv /etc/varnish/default.vcl /etc/varnish/default.vcl.bkp
sudo cp libmod-3scale/vcl/default_3scale_simple.vcl /etc/varnish/default.vcl
sudo /etc/init.d/varnish restart


It is always advisable to check the syslog for failures while testing

tail -f /var/log/syslog | egrep 'varnish'





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