4447f991_P_Guide___HTTP_General_Headers__HTTP_Cache_Control_Directives_HTTP_Message_Type
[Cache-Control Directive] min-fresh [Description] Specifies that the client wants a response that is not only not stale at the time the request is received, but that will remain fresh for the specified number of seconds. [HTTP Message Type] 
Request
R e q u e s t o r R e s p o n s e
R e s p o n s e
R e q u e s t
The TCP/IP Guide - HTTP General Headers
HTTP Message Type