- backdrop_add_http_header in includes/
bootstrap.inc - Sets an HTTP response header for the current page.
- backdrop_page_header in includes/
bootstrap.inc - Sets HTTP headers in preparation for a page response.
- backdrop_serve_page_from_cache in includes/
bootstrap.inc - Sets HTTP headers in preparation for a cached page response.
- drupal_send_headers in includes/
drupal.inc - Sends the HTTP response headers that were previously set, adding defaults.
- file_download_page in modules/
file/ file.pages.inc - Menu callback; download a single file entity.
- file_transfer in includes/
file.inc - Transfers a file to the client using HTTP.