hook_file_url_alter(&$uri)
Alter the URL to a file.
This hook is called from file_create_url(), and is called fairly frequently (10+ times per page), depending on how many files there are in a given page. If CSS and JS aggregation are disabled, this can become very frequently (50+ times per page) so performance is critical.
This function should alter the URI, if it wants to rewrite the file URL.
Parameters
$uri: The URI to a file for which we need an external URL, or the path to a shipped file.
Related topics
- Hooks
- Define functions that alter the behavior of Drupal core.
File
- core/lib/Drupal/Core/File/file.api.php, line 57
- Hooks related to the File management system.
Code
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 | function hook_file_url_alter(&$uri) { $user = \Drupal::currentUser(); // User 1 will always see the local file in this example. if ($user->id() == 1) { return; } $cdn_extensions = array('css', 'js', 'gif', 'jpg', 'jpeg', 'png'); // Most CDNs don't support private file transfers without a lot of hassle, // so don't support this in the common case. $schemes = array('public'); $scheme = file_uri_scheme($uri); // Only serve shipped files and public created files from the CDN. if (!$scheme || in_array($scheme, $schemes)) { // Shipped files. if (!$scheme) { $path = $uri; } // Public created files. else { $wrapper = \Drupal::service('stream_wrapper_manager')->getViaScheme($scheme); $path = $wrapper->getDirectoryPath() . '/' . file_uri_target($uri); } // Clean up Windows paths. $path = str_replace('\\', '/', $path); // Serve files with one of the CDN extensions from CDN 1, all others from // CDN 2. $pathinfo = pathinfo($path); if (isset($pathinfo['extension']) && in_array($pathinfo['extension'], $cdn_extensions)) { $uri = $cdn1 . '/' . $path; } else { $uri = $cdn2 . '/' . $path; } }} |
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