The Hypertext Transfer Protocol (HTTP) is a stateless applicationlevel protocol for distributed@ collaborative@ hypertext information systems. This document defines the semantics of HTTP/1.1 messages@ as expressed by request methods@ request header fields@ response status codes@ and response header fields@ along with the payload of messages (metadata and body content) and mechanisms for content negotiation.
RFC 7231-2014 history
2014RFC 7231-2014 Hypertext Transfer Protocol (HTTP/1.1): Semantics and Content