Kirby 3 / CDN Support

Kirby 3 Solved ✅
1

Reading the documentation modifying the index.php should be a way to use a CDN:

<?php

include __DIR__ . '/kirby/bootstrap.php';

$kirby = new Kirby([
    'urls' => [
        'index'  => 'https://getkirby.com',
        'media'  => 'https://media.getkirby.com',
        'assets' => 'https://assets.getkirby.com',
    ]
]);

echo $kirby->render();

Unfortunately, that change does not seem to use the CDN when accessing the CSS via:

<?= css('assets/css/main-min.css') ?>

My CSS is still served from the local domain. Any idea what I am doing wrong?

2

the cookbook does it differently using a plugin. maybe that helps.

note: the docs you are refering to is this guide.

css component

which gets called here

3

Solved it using the getkirby.com site as reference:

<?php

Kirby::plugin('default/cdn', [
    'components' => [
        'url' => function ($kirby, $path, $options, $original) {
            if (preg_match('!assets!', $path)) {
                if (option('cdn', false) !== false) {
                    return option('cdn.domain') . '/' . Cachebuster::path($path);
                } else {
                    return $original(Cachebuster::path($path), $options);
                }
            } else {
                return $original($path, $options);
            }
        }
    ]
]);

and

<?php

use Kirby\Cms\App;

class Cachebuster
{
    protected static $manifest = null;

    protected static function version(string $root, string $path): string
    {
        if (static::$manifest === null) {
            // try to load the manifest file, generated by laravel mix to
            // retrieve content-based hashes of assets files.
            $manifestFile = kirby()->roots()->assets() . '/mix-manifest.json';

            if (file_exists($manifestFile)) {
                static::$manifest = json_decode(file_get_contents($manifestFile), true);
            } else {
                static::$manifest = [];
            }
        }

        $key = preg_replace('/^\/?assets(\/.*)$/', '$1', $path);

        if (isset(static::$manifest[$key]) && preg_match('/\?id=([a-z0-9]+)$/', static::$manifest[$key], $matches)) {
            return substr($matches[1], 0, 8); // only use first 8 chars of hash, that should be enough to be somewhat save
        }

        // Fallback to modified time of assets file, if it
        // has no entry in the manifest file or the entry
        // has no hash.
        return dechex(filemtime($root));
    }

    public static function path(string $path): string
    {
        if (strpos($path, url()) === 0) {
            $path = ltrim(substr($path, strlen(url())), '/');
        }

        $kirby = App::instance();
        $root = $kirby->roots()->index() . '/' . $path;

        if (file_exists($root)) {
            
            $version = static::version($root, $path);

            if (option('cachebuster.mode') === 'path') {
                $path = dirname($path) . '/' . F::name($path) . '.' . $version . '.' . F::extension($path);
            } else {
                $path = $path . '?v=' . $version;
            }
        }

        return $path;
    }

}