As a brief note today, if you want to know if your Drupal 8 web pages are being cached, take a look at the headers that are returned by your Drupal 8 URLs. Here’s an example using the
$ curl -I http://your-drupal-url-here HTTP/1.1 200 OK Server: nginx Date: Sun, 15 Apr 2018 02:09:03 GMT Content-Type: text/html; charset=UTF-8 Connection: keep-alive Cache-Control: must-revalidate, no-cache, private X-Drupal-Dynamic-Cache: HIT X-UA-Compatible: IE=edge Content-language: en X-Content-Type-Options: nosniff X-Frame-Options: SAMEORIGIN expires: -1 Vary: X-Generator: Drupal 8 (https://www.drupal.org) pragma: no-cache
That last line that says “pragma: no-cache” means that the page isn’t being cached. If the page is being cached by the Drupal 8 system you’ll see this instead of that:
I just learned that when I installed a couple of anti-spam modules (Honeypot and reCAPTCHA) on this website. Before I installed the modules I saw the
X-Drupal-Cache: HIT message, but after I installed them I saw the “pragma: no-cache” output when looking at the request headers with
As for now I haven’t decided how to solve my comments spam problem, but if you want to know if your Drupal 8 pages are being cached, I can confirm how this works.
This website is a little one-man operation. If you found this information helpful, I’d appreciate it if you would share it.