xiaozhi-esp32-server/main/xiaozhi-server/core/websocket_server.py

import asyncio
import websockets
from config.logger import setup_logging
from core.connection import ConnectionHandler
from core.utils.util import initialize_modules

TAG = __name__


class WebSocketServer:
    def __init__(self, config: dict):
        self.config = config
        self.logger = setup_logging()
        self.config_lock = asyncio.Lock()
        modules = initialize_modules(
            self.logger,
            self.config,
            "VAD" in self.config["selected_module"],
            "ASR" in self.config["selected_module"],
            "LLM" in self.config["selected_module"],
            "TTS" in self.config["selected_module"],
            "Memory" in self.config["selected_module"],
            "Intent" in self.config["selected_module"],
        )
        self._vad = modules["vad"] if "vad" in modules else None
        self._asr = modules["asr"] if "asr" in modules else None
        self._tts = modules["tts"] if "tts" in modules else None
        self._llm = modules["llm"] if "llm" in modules else None
        self._intent = modules["intent"] if "intent" in modules else None
        self._memory = modules["memory"] if "memory" in modules else None
        self.active_connections = set()

    async def start(self):
        server_config = self.config["server"]
        host = server_config.get("ip", "0.0.0.0")
        port = int(server_config.get("port", 8000))

        async with websockets.serve(
            self._handle_connection, host, port, process_request=self._http_response
        ):
            await asyncio.Future()

    async def _handle_connection(self, websocket):
        """处理新连接，每次创建独立的ConnectionHandler"""
        # 创建ConnectionHandler时传入当前server实例
        handler = ConnectionHandler(
            self.config,
            self._vad,
            self._asr,
            self._llm,
            self._tts,
            self._memory,
            self._intent,
            self,  # 传入当前 WebSocketServer 实例
        )
        self.active_connections.add(handler)
        try:
            await handler.handle_connection(websocket)
        finally:
            self.active_connections.discard(handler)

    async def _http_response(self, websocket, request_headers):
        # 检查是否为 WebSocket 升级请求
        if request_headers.headers.get("connection", "").lower() == "upgrade":
            # 如果是 WebSocket 请求，返回 None 允许握手继续
            return None
        else:
            # 如果是普通 HTTP 请求，返回 "server is running"
            return websocket.respond(200, "Server is running\n")