Drupal Hook_file_download - ((free))

If any module returns -1 , the download is denied with a error. If no module grants access (by returning headers), the user also receives an access-denied response. Implementation Example (Drupal 8/9/10/11)

A common use case is restricting access to files based on a custom permission or a specific user role. function hook_file_download - Drupal API drupal hook_file_download

When a user requests a file via a private path (e.g., /system/files/... ), Drupal's file system triggers hook_file_download across all enabled modules. The hook receives the file's as a parameter and must return one of three values: If any module returns -1 , the download

: This grants access to the file. The array typically includes metadata like Content-Type or Content-Disposition . -1 : This explicitly denies access to the file. function hook_file_download - Drupal API When a user

: This indicates the module has no opinion on this specific file, allowing other modules to decide.

hook_file_download is a fundamental hook in Drupal used to control access to private files and specify the HTTP headers sent during their download. When a file is stored in a , it is not directly accessible via a web server URL; instead, Drupal processes the request through a PHP script that invokes this hook to determine if the user has permission to view it. How hook_file_download Works