function cdn_file_url_alter in CDN 8.3

Same name and namespace in other branches

1. 6.2 cdn.module \cdn_file_url_alter()
2. 7.2 cdn.module \cdn_file_url_alter()

Implements hook_file_url_alter().

File

./cdn.module, line 36

Provides integration with CDNs for files.

Code

function cdn_file_url_alter(&$uri) {

  // Gracefully handle invalid invocations of file_create_url().
  // @todo Remove when requiring Drupal 9.3.
  // @see https://www.drupal.org/project/drupal/issues/2669074
  if (empty($uri) || !is_string($uri)) {
    \Drupal::logger('php')
      ->warning('A caller of file_create_url() did not pass a file URI.');
    return;
  }

  // Don't alter file URLs when running update.php.
  // @todo Remove the second condition after the CDN module requires the Drupal core minor that ships with https://www.drupal.org/project/drupal/issues/2969056
  if (defined('MAINTENANCE_MODE') || stripos($_SERVER['PHP_SELF'], 'update.php') !== FALSE) {
    return;
  }

  // Don't alter CSS file URLs while settings.php is disabling CSS aggregation.
  if (substr($uri, -4) === '.css' && isset($GLOBALS['config']['system.performance']['css']['preprocess']) && $GLOBALS['config']['system.performance']['css']['preprocess'] === FALSE) {
    return;
  }

  // Don't serve CKEditor from a CDN when far future future is enabled (CKEditor
  // insists on computing other assets to load based on this URL).
  if ($uri === 'core/assets/vendor/ckeditor/ckeditor.js' && \Drupal::service('cdn.settings')
    ->farfutureIsEnabled()) {
    return;
  }

  // Don't alter file URLs while processing a CSS file.
  // @see \Drupal\cdn\Asset\CssOptimizer
  global $_cdn_in_css_file;
  if ($_cdn_in_css_file) {
    return;
  }
  $result = \Drupal::service('cdn.file_url_generator')
    ->generate($uri);
  if ($result) {
    $uri = $result;
  }
}