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| <?php | |
| /** | |
| * @file | |
| * Contains \Drupal\Core\Asset\AssetDumper. | |
| */ | |
| 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; | |
| } | |
| } |