The Cache-Control header is removed from cache hits

[szepeviktor]

Response without cache, e.g. a POST request

Cache-Control: no-cache, no-store, must-revalidate, max-age=0

with cache, e.g. a GET request: the Cache-Control header is missing meaning

This response allows caches to assign their own freshness lifetimes to it.

Please advise. It is intentional?

[timotei-litespeed]

Most of the time we leave Cache-Control as it was set before.
There is one exeception: the one you wrote above :)

[szepeviktor]

@timotei-litespeed Thank you for your response.

In what WordPress filter can I add a Cache-Control header?
Or in htaccess?

[timotei-litespeed]

@szepeviktor sorry for late answering
We use default PHP functions to change headers: https://www.php.net/manual/en/function.header.php also you can use: https://www.php.net/manual/en/function.get-headers.php to see the headers

[timotei-litespeed]

@szepeviktor what is the status of the question?

[szepeviktor]

I'd like you to (optionally?) copy the Cache-Control header from the original response.

[timotei-litespeed]

@szepeviktor reading over your last question I saw you asked where you can change header.
We change header in these actions(at least): wp_loaded shutdown

What if your end result? What do you wat to achieve?

[szepeviktor]

What do you want to achieve?

I want the keep the original Cache-Control header in the cached version of a page.

[timotei-litespeed]

I would use: https://www.php.net/manual/en/function.get-headers.php