The WebSocket Protocol is an Internet Engineering Task Force (IETF) standard protocol designed to allow asynchronous bidirectional communication between hosts over a network that might only provide connectivity via web proxies.
This document specifies extensions to the WebSocket Protocol.
Sections 1.8, 2, and 3 of this specification are normative and can contain the terms MAY, SHOULD, MUST, MUST NOT, and SHOULD NOT as defined in [RFC2119]. Sections 1.5 and 1.9 are also normative but do not contain those terms. All other sections and examples in this specification are informative.