Module websocket 

WebSocket protocol support (RFC 6455).

This module provides:

• WebSocket handshake helpers (Sec-WebSocket-Accept)
• A minimal frame codec (mask/unmask, ping/pong/close, text/binary)

Design constraints for this project:

• No Tokio
• Minimal dependencies (implement SHA1 + base64 locally)
• Cancel-correct: all I/O is async and can be cancelled via asupersync

Structs

Frame

A single WebSocket frame.

WebSocket

A WebSocket connection (server-side).

Enums

OpCode

WebSocket opcode.

WebSocketError

WebSocket protocol error.

WebSocketHandshakeError

WebSocket handshake error.

Constants

WS_GUID

The GUID used for computing Sec-WebSocket-Accept.

Functions

websocket_accept_from_key

Compute Sec-WebSocket-Accept from Sec-WebSocket-Key (RFC 6455).