<!-- start http_headers -->
Content-type: text/html; charset=utf-8
<!-- end http_headers -->

<!-- start json_headers -->
Content-type: application/json; charset=utf-8
<!-- end json_headers -->

<!-- start http_headers-no-cache -->
Content-type: text/html; charset=utf-8
Cache-Control: no-cache, no-store, must-revalidate
Pragma: no-cache
Expires: 0
<!-- end http_headers-no-cache -->