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