server

version

The date and time that the message was sent.

Control options for the current connection and list of hop-by-hop response fields.

The client would like to keep the connection open.

A HSTS Policy informing the HTTP client how long to cache the HTTPS only policy and whether this applies to subdomains.

The time a browser should remember a site can only be accessed with https (seconds).

This and all future requests should be directed to the given URI. The request method can change.