WebSocket Definition WebSocket is a communications protocol for a persistent, bi-directional, full duplex TCPconnection from a user’s web browser to a server. A WebSocket connection is initiated by sending a WebSocket handshake request from a browser’s HTTP connection to a server to upgrade the connection. Along with the upgrade request header, the handshake request includes a 64-bit Sec-WebSocket-Key header. The server responds with a hash of the key in a Sec-Websocket-Auth header. This h...