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[yaffs-website] / web / core / lib / Drupal / Core / Asset / AssetDumper.php

diff --git a/web/core/lib/Drupal/Core/Asset/AssetDumper.php b/web/core/lib/Drupal/Core/Asset/AssetDumper.php
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+++ b/web/core/lib/Drupal/Core/Asset/AssetDumper.php
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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;
+  }
+
+}