Add WebSocket server library - #5
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Implements the WebSocket server library designed in Discussion #2, built on lori (TCP) and ssl (SHA-1 for handshake accept key). Follows lori/stallion's "your actor IS the connection" pattern where the user's actor owns a WebSocketServer protocol handler instance. Public API: WebSocketServer (protocol handler), WebSocketServerActor (user trait), WebSocketLifecycleEventReceiver (callbacks with default no-ops), WebSocketConfig (immutable config), UpgradeRequest (parsed HTTP upgrade), CloseCode and HandshakeError unions. Internal components: _HandshakeParser (HTTP upgrade), _FrameParser (incremental WebSocket frame parsing), _FrameEncoder (server frames), _FragmentReassembler (message reassembly with UTF-8 validation), _Utf8Validator, and a trait-based state machine (_Handshaking, _Open, _Closing, _Closed). 60 tests (example-based + PonyCheck property tests) covering all parsers, encoder, reassembler, and validator. Echo server example. Design: #2
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Initial implementation of a WebSocket server library built on lori. Implements RFC 6455 including the HTTP upgrade handshake, frame parsing and encoding, message fragmentation/reassembly, and the close handshake.
Follows lori/stallion's "your actor IS the connection" pattern: users implement
WebSocketServerActorand the library handles all protocol details, delivering application-level events through lifecycle callbacks.Architecture:
WebSocketServer: protocol handler class (state machine, parsers, encoder)WebSocketServerActor: trait combiningTCPConnectionActor+ lifecycle callbacks_Handshaking->_Open->_Closing->_Closed60 unit tests including PonyCheck property-based tests for all internal components. WSS (TLS) support via
WebSocketServer.ssl()constructor.Design: #2