Cache-Control(Http Header)
The Cache-Control HTTP header holds directives (instructions) for caching in both requests and responses. A given directive in a request does not mean the same directive should be in the response. Syntax: Caching directives have the following rules to be valid: Case-insensitive, but lowercase is recommended. Multiple directives are comma-separated. Some directives have an optional argument, which can be either a token or a quoted-string. (See spec for definitions) Cache request directives Standard Cache-Control directives that can be used by the client in an HTTP request. Cache-Control: max-age=<seconds> Cache-Control: max-stale[=<seconds>] Cache-Control: min-fresh=<seconds> Cache-Control: no-cache Cache-Control: no-store Cache-Control: no-transform Cache-Control: only-if-cached Cache response directives Standard Cache-Control directives that can be used by the server in an HTTP response. Cache-Control: must-revalidate Cache-Control: no-cache Cache-Control: no-store