function image_file_download in Image 5.2

Same name and namespace in other branches

1. 5 image.module \image_file_download()
2. 6 image.module \image_file_download()

Implementation of hook_file_download().

Note that in Drupal 5, the upload.module's hook_file_download() checks its permissions for all files in the {files} table. We store our file information in {files} if private files transfers are selected and the upload.module is enabled, users will the 'view uploaded files'permission to view images.

1 call to image_file_download()

image_fetch in ./image.module

Fetches an image file, allows "shorthand" image urls such of the form: image/view/$nid/$label (e.g. image/view/25/thumbnail or image/view/14)

File

./image.module, line 420

Code

function image_file_download($filename) {
  $filepath = file_create_path($filename);
  $result = db_query("SELECT i.nid, f.filemime, f.filesize FROM {image} i INNER JOIN {files} f ON i.fid = f.fid WHERE f.filepath = '%s'", $filepath);
  if ($file = db_fetch_object($result)) {
    $node = node_load(array(
      'type' => 'image',
      'nid' => $file->nid,
    ));
    if ($node) {
      if (node_access('view', $node)) {

        // The user either needs to have 'view original images' permission or
        // the path must be listed for something other than the node's original
        // size. This will be the case when the orignal is smaller than a
        // derivative size.
        $images = (array) $node->images;
        unset($images[IMAGE_ORIGINAL]);
        if (user_access('view original images') || in_array($filepath, $images)) {
          return array(
            'Content-Type: ' . mime_header_encode($file->filemime),
            'Content-Length: ' . (int) $file->filesize,
          );
        }
      }
      return -1;
    }
  }
}