It tells browsers and caches that the response contains. 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.
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Spent days trying to get chromium based app to stop caching images.
Ok, even if you aren't using express, what essentially needed is to set the nocache headers.
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's generated at the end of the request and could be another source of unintended. I'm adding the headers in a reusable middleware, otherwise you can set those headers in any way that works. For security reasons we do not want certain pages in our application to be cached, eve.
The ?nocache with time echo solved the issue.
