function hook_file_download

Control access to private file downloads and specify HTTP headers.

This hook allows modules enforce permissions on file downloads when the private file download method is selected. Modules can also provide headers to specify information like the file's name or MIME type.

Parameters

$filepath: String of the file's path.

Return value

If the user does not have permission to access the file, return -1. If the user has permission, return an array with the appropriate headers. If the file is not controlled by the current module, the return value should be NULL.

Related topics

File

developer/hooks/core.php, line 536

These are the hooks that are invoked by the Drupal core.

Code

function hook_file_download($filepath) {
  if ($filemime = db_result(db_query("SELECT filemime FROM {fileupload} WHERE filepath = '%s'", file_create_path($filepath)))) {
    if (user_access('access content')) {
      return array(
        'Content-type:' . $filemime,
      );
    }
    else {
      return -1;
    }
  }
}