Dynamic CDN # ![Coverage Status][coveralls-image]

Contributors: ericmann, 10up
Donate link: https://eamann.com Tags: CDN, images, performance
Requires at least: 3.8.1
Tested up to: 4.5.2
Stable tag: 0.4.0
License: GPLv2 or later
License URI: https://github.com/ericmann/dynamic-cdn/blob/master/LICENSE.md, _(*1)

Dynamic CDN for front-end assets., _(*2)

Description

Dynamic solution for rewriting image asset URLs to a hosted content delivery network (CDN) with optional domain sharding for concurrent downloads., _(*3)

This plugin is based heavily on the CDN dropin from Mark Jaquith's WP_Stack (https://github.com/markjaquith/WP-Stack)., _(*4)

Installation

Manual Installation

Upload the entire /dynamic-cdn directory to the /wp-content/plugins/ directory.
Activate Dynamic CDN through the 'Plugins' menu in WordPress.

Frequently Asked Questions

Will this work as a mu-plugin?

Yes. The plugin, as designed, will work just fine in the mu-plugins directory. We highly recommend a second mu-plugin be added to configure the CDN domains used by the system., _(*5)

How do I add a domain?

In a function wired to dynamic_cdn_first_loaded, you'll reference the ->add_domain() method of the Dynamic_CDN object. For example:, _(*6)

function my_cdn_domains() {
    $manager = DomainManager::last();
    $manager->add( 'cdn0.mydomain.com' );
    $manager->add( 'cdn1.mydomain.com' );
    $manager->add( 'cdn2.mydomain.com' );
}
add_action( 'dynamic_cdn_first_loaded', 'my_cdn_domains' );

What if I want to add my domains through wp-config.php?

Simply define a DYNCDN_DOMAINS constant that's a comma-delimited list of your cdn domains. For example:, _(*7)

define( 'DYNCDN_DOMAINS', 'cdn0.mydomain.com,cdn1.mydomain.com,cdn2.mydomain.com' );

What if I don't add any domains, will this break my images?

Hopefully not. If you haven't added any domains the plugin will not rewrite anything, bypassing your images entirely., _(*8)

Screenshots

None at this time., _(*9)

Changelog

0.4.0

New: Unit tests for core functionality
Fix: Ensure srcsets don't filter in admin views

0.3.0

New: Add support for WordPress 4.4 srcsets

0.2.0

New: CDN domains can be added with a constant.
Fix: Make domain mapping multisite aware. props @trepmal

0.1.0

First release

Upgrade Notice

0.4.0

Domain management has moved from a general-purpose class to a purpose-built DomainManager object. This object is instantiated with your current site's domain name, and can be accessed throught the static DomainManager::last() helper. (This method automatically returns the last-instantiated domain manager). If you weren't manipulating CdN domains programmatically, you won't need to change anything at all., _(*10)