The date and time that the message was sent.

date

server

The time at which the response is considered stale.

Inform all caching mechanisms from server to client whether they may cache this object.

May be stored by any cache but must be validated by the server.

HTTP/1.0 backwards compatible cache handling.

Force requests to the origin server before releasing a cache.

A cookie sent from the server to be set on the client

The client will only send the cookie when requesting this path, or subdirectories, from the server.

Prevents access to the cookie through JavaScript.

Number of seconds until the cookie expires.

Indicates that different content may be provided to different clients, depending on the vary header.

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

The client would like to keep the connection open.

The client or server would like to close the connection.

The resource has temporarily been moved to another location. This is superseded by 303 and 307.

Standard response indicating a successful action. For GET requests this will be the resource, and for POST it will be the result of the action.