Redirect after registration to node page

Redirect to node page after registration

/**
 * Implements hook_file_download()
 */
function mymodule_file_download($uri) {
  $url = drupal_parse_url($_SERVER['HTTP_REFERER']);
  // Strip out the server name.
  $path = substr($url['path'], strpos($url['path'], $_SERVER['SERVER_NAME']) + strlen($_SERVER['SERVER_NAME']) + 1);
  if ($path == 'user/login') {
    // If we get here the user just logged or registered. If we simply
    // return the file they will stay on the login page. We need to find the
    // node that contains the file and send them back to that with a message.
    $existing_files = file_load_multiple(array(), array('uri' => $uri));
    if (count($existing_files)) {
      $existing = reset($existing_files);
      $query = new EntityFieldQuery();
      $query->entityCondition('entity_type', 'node');
      $query->fieldcondition('field_private_file', 'fid', $existing->fid); // Make sure the field name matches the field created in step 3
      $result = $query->execute();
      if (!empty($result)) {
        $nid = reset(array_keys($result['node']));
        drupal_set_message('You have logged in and can now download files. Please select the file again below.');
        drupal_goto('node/' . $nid);
      }
    }
  }
}