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- <?php
- namespace Drupal\Core\Asset;
- use Drupal\Component\Utility\Crypt;
- /**
- * Dumps a CSS or JavaScript asset.
- */
- class AssetDumper implements AssetDumperInterface {
- /**
- * {@inheritdoc}
- *
- * The file name for the CSS or JS cache file is generated from the hash of
- * the aggregated contents of the files in $data. This forces proxies and
- * browsers to download new CSS when the CSS changes.
- */
- public function dump($data, $file_extension) {
- // Prefix filename to prevent blocking by firewalls which reject files
- // starting with "ad*".
- $filename = $file_extension . '_' . Crypt::hashBase64($data) . '.' . $file_extension;
- // Create the css/ or js/ path within the files folder.
- $path = 'public://' . $file_extension;
- $uri = $path . '/' . $filename;
- // Create the CSS or JS file.
- file_prepare_directory($path, FILE_CREATE_DIRECTORY);
- if (!file_exists($uri) && !file_unmanaged_save_data($data, $uri, FILE_EXISTS_REPLACE)) {
- return FALSE;
- }
- // If CSS/JS gzip compression is enabled and the zlib extension is available
- // then create a gzipped version of this file. This file is served
- // conditionally to browsers that accept gzip using .htaccess rules.
- // It's possible that the rewrite rules in .htaccess aren't working on this
- // server, but there's no harm (other than the time spent generating the
- // file) in generating the file anyway. Sites on servers where rewrite rules
- // aren't working can set css.gzip to FALSE in order to skip
- // generating a file that won't be used.
- if (extension_loaded('zlib') && \Drupal::config('system.performance')->get($file_extension . '.gzip')) {
- if (!file_exists($uri . '.gz') && !file_unmanaged_save_data(gzencode($data, 9, FORCE_GZIP), $uri . '.gz', FILE_EXISTS_REPLACE)) {
- return FALSE;
- }
- }
- return $uri;
- }
- }
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