kingkool68 / wordpress-cdn-integration

CDN Integration WordPress Plugin

This plugin lets you serve your entire WordPress site through a CDN. Currently the only provider supported is KeyCDN.

Usage

Install this plugin to your /wp-config/plugins/ directory, activeate it, visit the setting page located in the WordPress Admin menu under Settings --> CDN Integration

How can I tell if it is working?

The easiest way to check if your page is being served from a CDN as opposed to your origin server is to check the response headers of your page. You'll want to look for a header set called X-CACHE set to HIT.

• KeyCDN has an online tool: https://tools.keycdn.com/curl
• Use the network tab of your browser's developer tools
• Use curl: curl -I http://example.com

How can I flush the cache?

The plugin handles flushing URLs from the CDN when content changes. This is thanks to the various actions WordPress provides when content is changed. You can also manually flush the cache using an included Dashboard widget:

With the widget you can stay within your own site and flush:

• Multiple URLs at once (one per line)
• Multiple Cache Tags (one per line)
• The entire cache by entering all

You can also flush the cache manually by visiting your CDN provider.

wordpress-cdn-integration's Issues

Force trailing slash for KeyCDN requests

Since we remove the redirect_canonical() if it is a KeyCDN request, we need to make sure the request ends with a trailing slash if appropriate.

Otherwise URLs like www.example.com/foo/bar become valid... gross.

See https://core.trac.wordpress.org/browser/tags/4.5.3/src/wp-includes/canonical.php#L0

Endless redirect if unmapped domain == admin domain

Steps to reproduce on a subdomain multisite install (childsite.example.com):

1. Set public domain to childsite.com
2. Set admin domain to childsite.example.com

Need a conditional check to make sure $unmapped_domain != $admin_domain...

if( $this->current_domain == $this->unmapped_domain && $this->unmapped_domain != $this->admin_domain && !$this->is_admin_ajax_request && !$this->is_async_upload_request ) {
            $domain = 'http://' . $this->public_domain;
            if( $this->is_public_ssl ) {
                $domain = set_url_scheme( $domain, 'https' );
            }
            if( is_admin() ) {
                $domain = 'http://' . $this->admin_domain;
                if( $this->is_admin_ssl ) {
                    $domain = set_url_scheme( $domain, 'https' );
                }
            }

            $redirect_url = $domain . $this->get_request_uri();
            wp_redirect( $redirect_url, 301 );
            die();
        }

Enable integration with CloudFlare

See https://api.cloudflare.com/#zone-purge-individual-files-by-url-and-cache-tags