Other Cache-Control parameters such as max-age are irrelevant if the abovementioned Cache-Control parameters are specified. the end-user manipulates the operating system date and the client software is relying on it. Date: Wed, 18:32:02 GMTīut that may fail if e.g.

On the other hand, if the server auto-includes a valid Date header, then you could theoretically omit Cache-Control too and rely on Expires only.

If you don't care about HTTP 1.0 proxies either, then you could omit Expires. If you don't care about IE6 nor HTTP 1.0 clients (HTTP 1.1 was introduced in 1997), then you could omit Pragma. If you don't care about IE6 and its broken caching when serving pages over HTTPS with only no-store, then you could omit Cache-Control: no-cache. In HTTP 1.1, the Cache-Control takes precedence over Expires, so it's after all for HTTP 1.0 proxies only. The Expires is per the HTTP 1.0 and 1.1 specs for clients and proxies. The Pragma is per the HTTP 1.0 spec for prehistoric clients. The Cache-Control is per the HTTP 1.1 spec for clients and proxies (and implicitly required by some clients next to Expires). The correct minimum set of headers that works across all mentioned clients (and proxies): Cache-Control: no-cache, no-store, must-revalidate

Replay media catcher for mac 1.1.1