HTTP/1.1 200 OK
date: Thu, 17 Jun 2021 10:18:14 GMT
last-modified: Mon, 24 Feb 2014 23:09:53 GMT ...
$ curl -I 'https://www.w3.org/' HTTP/2 200 [...] strict-transport-security: max-age=15552000; includeSubdomains; preload content-security-policy: upgrade-insecure-requests
HTTP/1.1 200 OK
date: Thu, 17 Jun 2021 10:18:14 GMT
last-modified: Mon, 24 Feb 2014 23:09:53 GMT ...