Is it possible to check the html page by link or not before the full download?

Question

HTML

It can be a video file or a program. How to check? I use php, curl when downloading.
In general, you need to download html pages and not download anything else.

Answer 1

curl -I some.url
check response for Content-Type: text/html;

Answer 2

Make a HEAD request, and look at the Content-Type