public function AssetDumper::dump in Advanced CSS/JS Aggregation 8.2

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.

Overrides AssetDumperInterface::dump

File

src/Asset/AssetDumper.php, line 88

Class

AssetDumper

Dumps a CSS or JavaScript asset.

Namespace

Drupal\advagg\Asset

Code

public function dump($data, $file_extension) {
  if (!isset($this->extension) || $this->extension != $file_extension) {
    $this
      ->preparePath($file_extension);
  }

  // Prefix filename to prevent blocking by firewalls which reject files
  // starting with "ad*".
  $filename = $this->extension . '_' . Crypt::hashBase64($data) . $this->hash . $this->extension;
  $uri = $this->path . $filename;

  // Create the CSS or JS file.
  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') && $this->config
    ->get($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,
    $filename,
  ];
}