Spent days trying to get chromium based app to stop caching images. Without a field name, the directive applies to the entire request and a shared (proxy server) cache must force. The ?nocache with time echo solved the issue.
Uncovering Truth
It's generated at the end of the request and could be another source of.
For security reasons we do not want certain pages in our application to be.
But what i would like to do is to apply ?nocache=1 to every url related to the site (including the assets like style.css) so that i get the non cached version of the files. It was intended as a privacy measure: I'm adding the headers in a reusable middleware, otherwise you can set those headers in any way. Beware of etag even if you are using nocache, the etag header isn't removed, because it works in a different way.
The list is just examples of different techniques, it's not for direct insertion.