function backdrop_json_deliver

Packages and sends the result of a page callback to the browser as JSON.

@since 1.5.0

Parameters

$page_callback_result: The result of a page callback. Can be one of:

• NULL: to indicate no content.
• An integer menu status constant: to indicate an error condition.
• An array of raw data to be printed as JSON.

See also

backdrop_deliver_page()

backdrop_deliver_html_page()

File

core/includes/common.inc, line 5963

Common functions that many Backdrop modules will need to reference.

Code

function backdrop_json_deliver($page_callback_result) {

  // Menu status constants are integers; page content is a string or array.
  if (is_int($page_callback_result)) {
    switch ($page_callback_result) {
      case MENU_NOT_FOUND:
        backdrop_add_http_header('Status', '404 Not Found');
        watchdog('page not found', check_plain($_GET['q']), NULL, WATCHDOG_WARNING);
        $output = array('error' => t('Page not found'));
        break;

      case MENU_ACCESS_DENIED:
        backdrop_add_http_header('Status', '403 Forbidden');
        watchdog('access denied', check_plain($_GET['q']), NULL, WATCHDOG_WARNING);
        $output = array('error' => t('Access denied'));
        break;

      case MENU_SITE_OFFLINE:
        backdrop_add_http_header('Status', '503 Service unavailable');
        backdrop_set_title(t('Site under maintenance'));
        $output = array('error' => t('Site is offline.'));
        break;
    }
  }
  elseif (isset($page_callback_result)) {
    $output = $page_callback_result;
  }

  if (isset($output)) {
    backdrop_json_output($page_callback_result);
  }

  // Perform end-of-request tasks.
  backdrop_page_footer();
}