The date and time that the message was sent.

date

server

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

Indicate the connection should be upgraded from HTTP to HTTPS.

The client or server would like to close the connection.

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

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 This is superseded by 303 and 307.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.