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========================================
Deploying with Content Delivery Networks
========================================
.. _reference/cdn/keycdn:
Deploying with KeyCDN_
======================
.. sectionauthor:: Fabien Meghazi
This document will guide you through the setup of a KeyCDN_ account with your
Odoo powered website.
Step 1: Create a pull zone in the KeyCDN dashboard
--------------------------------------------------
.. image:: cdn/keycdn_create_a_pull_zone.png
:class: img-responsive
When creating the zone, enable the CORS option in the
:guilabel:`advanced features` submenu. (more on that later)
.. image:: cdn/keycdn_enable_CORS.png
:class: img-responsive
Once done, you'll have to wait a bit while KeyCDN_ is crawling your website.
.. image:: cdn/keycdn_progressbar.png
:class: img-responsive
.. note:: a new URL has been generated for your Zone, in this case it is
``http://pulltest-b49.kxcdn.com``
Step 2: Configure the odoo instance with your zone
--------------------------------------------------
In the Odoo back end, go to the :guilabel:`Website Settings`: menu, then
activate the CDN support and copy/paste your zone URL in the
:guilabel:`CDN Base URL` field.
.. image:: cdn/odoo_cdn_base_url.png
:class: img-responsive
Now your website is using the CDN for the resources matching the
:guilabel:`CDN filters` regular expressions.
You can have a look to the HTML of your website in order to check if the CDN
integration is properly working.
.. image:: cdn/odoo_check_your_html.png
:class: img-responsive
Why should I activate CORS?
---------------------------
A security restriction in some browsers (Firefox and Chrome at time of writing)
prevents a remotely linked CSS file to fetch relative resources on this same
external server.
If you don't activate the CORS option in the CDN zone, the more obvious
resulting problem on a default Odoo website will be the lack of font-awesome
icons because the font file declared in the font-awesome CSS won't be loaded on
the remote server.
Here's what you would see on your homepage in such a case:
.. image:: cdn/odoo_font_file_not_loaded.png
:class: img-responsive
A security error message will also appear in the browser's console:
.. image:: cdn/odoo_security_message.png
:class: img-responsive
Enabling the CORS option in the CDN fixes this issue.
.. _KeyCDN: https://www.keycdn.com