websockets
WebSocket Reference
Protocol Basics
WebSocket upgrades an HTTP connection to a persistent, full-duplex channel over a single TCP connection.
Handshake: Client sends an HTTP Upgrade request; server responds with 101 Switching Protocols.
GET /chat HTTP/1.1
Host: server.example.com
Upgrade: websocket
Connection: Upgrade
Sec-WebSocket-Key: dGhlIHNhbXBsZSBub25jZQ==
Sec-WebSocket-Version: 13
Frame opcodes:
0x0continuation frame
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