I have a rewrite rule which redirects to / if no Accept-Language header is present and someone attempts to visit ?lang=en. It works fine, except for the headers returned. Vary: Accept-Language is m...

I currently use Akamai as a CDN for my app, which is served over multiple subdomains. I recently realized that Akamai is caching CORS requests the same, regardless of the origin from which they we...

I am writing a web application framework. To properly support reverse proxy servers, I want to make sure that whenever the web application is accessing cookie data, pages that are sent to the user ...

Question: What is the best way to send Vary HTTP header when server accept gzip/deflate connections AND serve a different content for mobile clients? I see two possible variants but I cannot find ...

Does Chrome's cache support the HTTP Vary header? For a specific url request the server responds two different html files depending if it's an ajax request or not. So I added the Vary header to X-R...

I've got a website that has a number of host headers. The theme and data depend on the host header, and different hosts load different looking sites. So let's imagine I have a website called "Foo"...

Header append Vary User-Agent env=!dont-vary Can anyone give a detailed explanation for this?