IETF RFC 7231
Hypertext Transfer Protocol (HTTP/1.1): Semantics and Content
|Publication Date:||1 June 2014|
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.