Can the Date Header Be Used to Detect Caching?
No. But actually, not really.
Web Caches Let’s start with some background. Web caches are in-the-middle components physically located between a client and an origin web server. They are used to reduce the latency of HTTP requests by storing the responses of the server and serving them to the client when the same request is made again. Moreover, web caches are used to reduce the load on the origin web servers. Web caches can be placed anywhere in the path between the client and the origin web server. Content Delivery Networks (CDNs) are a type of web caches that is geographically distributed and are usually placed as close as possible to the client, reducing the latency of the requests.
Nov 15, 2023