298 lines
11 KiB
Python
298 lines
11 KiB
Python
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# -*- coding: utf-8 -*-
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"""
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WebSocket实时通信服务器
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提供实时对话功能
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"""
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import asyncio
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import json
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import logging
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from datetime import datetime
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from typing import Dict, Set
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import websockets
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from websockets.server import WebSocketServerProtocol
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from ..dialogue.realtime_chat import RealtimeChatManager
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logger = logging.getLogger(__name__)
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class WebSocketServer:
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"""WebSocket服务器"""
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def __init__(self, host: str = "localhost", port: int = 8765):
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self.host = host
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self.port = port
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self.chat_manager = RealtimeChatManager()
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self.connected_clients: Set[WebSocketServerProtocol] = set()
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async def register_client(self, websocket: WebSocketServerProtocol):
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"""注册客户端"""
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self.connected_clients.add(websocket)
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logger.info(f"客户端连接: {websocket.remote_address}")
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async def unregister_client(self, websocket: WebSocketServerProtocol):
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"""注销客户端"""
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self.connected_clients.discard(websocket)
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logger.info(f"客户端断开: {websocket.remote_address}")
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async def handle_message(self, websocket: WebSocketServerProtocol, message: str):
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"""处理客户端消息"""
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try:
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data = json.loads(message)
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message_type = data.get("type")
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message_id = data.get("messageId") # 获取消息ID
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if message_type == "create_session":
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await self._handle_create_session(websocket, data, message_id)
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elif message_type == "send_message":
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await self._handle_send_message(websocket, data, message_id)
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elif message_type == "get_history":
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await self._handle_get_history(websocket, data, message_id)
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elif message_type == "create_work_order":
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await self._handle_create_work_order(websocket, data, message_id)
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elif message_type == "get_work_order_status":
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await self._handle_get_work_order_status(websocket, data, message_id)
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elif message_type == "end_session":
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await self._handle_end_session(websocket, data, message_id)
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else:
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await self._send_error(websocket, "未知消息类型", message_id)
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except json.JSONDecodeError:
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await self._send_error(websocket, "JSON格式错误")
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except Exception as e:
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logger.error(f"处理消息失败: {e}")
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await self._send_error(websocket, f"处理消息失败: {str(e)}")
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async def _handle_create_session(self, websocket: WebSocketServerProtocol, data: Dict, message_id: str = None):
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"""处理创建会话请求"""
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user_id = data.get("user_id", "anonymous")
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work_order_id = data.get("work_order_id")
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session_id = self.chat_manager.create_session(user_id, work_order_id)
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response = {
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"type": "session_created",
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"session_id": session_id,
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"timestamp": datetime.now().isoformat()
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}
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if message_id:
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response["messageId"] = message_id
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await websocket.send(json.dumps(response, ensure_ascii=False))
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async def _handle_send_message(self, websocket: WebSocketServerProtocol, data: Dict, message_id: str = None):
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"""处理发送消息请求"""
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session_id = data.get("session_id")
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message = data.get("message")
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if not session_id or not message:
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await self._send_error(websocket, "缺少必要参数", message_id)
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return
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# 处理消息
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result = self.chat_manager.process_message(session_id, message)
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response = {
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"type": "message_response",
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"session_id": session_id,
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"result": result,
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"timestamp": datetime.now().isoformat()
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}
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if message_id:
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response["messageId"] = message_id
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await websocket.send(json.dumps(response, ensure_ascii=False))
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async def _handle_get_history(self, websocket: WebSocketServerProtocol, data: Dict, message_id: str = None):
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"""处理获取历史记录请求"""
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session_id = data.get("session_id")
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if not session_id:
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await self._send_error(websocket, "缺少会话ID", message_id)
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return
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history = self.chat_manager.get_session_history(session_id)
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response = {
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"type": "history_response",
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"session_id": session_id,
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"history": history,
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"timestamp": datetime.now().isoformat()
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}
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if message_id:
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response["messageId"] = message_id
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await websocket.send(json.dumps(response, ensure_ascii=False))
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async def _handle_create_work_order(self, websocket: WebSocketServerProtocol, data: Dict, message_id: str = None):
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"""处理创建工单请求"""
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session_id = data.get("session_id")
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title = data.get("title")
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description = data.get("description")
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category = data.get("category", "技术问题")
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priority = data.get("priority", "medium")
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if not session_id or not title or not description:
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await self._send_error(websocket, "缺少必要参数", message_id)
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return
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result = self.chat_manager.create_work_order(session_id, title, description, category, priority)
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response = {
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"type": "work_order_created",
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"session_id": session_id,
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"result": result,
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"timestamp": datetime.now().isoformat()
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}
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if message_id:
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response["messageId"] = message_id
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await websocket.send(json.dumps(response, ensure_ascii=False))
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async def _handle_get_work_order_status(self, websocket: WebSocketServerProtocol, data: Dict, message_id: str = None):
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"""处理获取工单状态请求"""
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work_order_id = data.get("work_order_id")
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if not work_order_id:
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await self._send_error(websocket, "缺少工单ID", message_id)
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return
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result = self.chat_manager.get_work_order_status(work_order_id)
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response = {
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"type": "work_order_status",
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"work_order_id": work_order_id,
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"result": result,
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"timestamp": datetime.now().isoformat()
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}
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if message_id:
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response["messageId"] = message_id
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await websocket.send(json.dumps(response, ensure_ascii=False))
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async def _handle_end_session(self, websocket: WebSocketServerProtocol, data: Dict, message_id: str = None):
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"""处理结束会话请求"""
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session_id = data.get("session_id")
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if not session_id:
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await self._send_error(websocket, "缺少会话ID", message_id)
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return
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success = self.chat_manager.end_session(session_id)
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response = {
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"type": "session_ended",
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"session_id": session_id,
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"success": success,
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"timestamp": datetime.now().isoformat()
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}
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if message_id:
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response["messageId"] = message_id
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await websocket.send(json.dumps(response, ensure_ascii=False))
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async def _send_error(self, websocket: WebSocketServerProtocol, error_message: str, message_id: str = None):
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"""发送错误消息"""
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response = {
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"type": "error",
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"message": error_message,
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"timestamp": datetime.now().isoformat()
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}
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if message_id:
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response["messageId"] = message_id
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await websocket.send(json.dumps(response, ensure_ascii=False))
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async def handle_client(self, websocket: WebSocketServerProtocol, path: str):
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"""处理客户端连接"""
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# 检查连接头（如果可用）
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try:
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if hasattr(websocket, 'request_headers'):
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headers = websocket.request_headers
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connection = headers.get("Connection", "").lower()
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# 处理不同的连接头格式
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if "upgrade" not in connection and "keep-alive" in connection:
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logger.warning(f"收到非标准连接头: {connection}")
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# 对于keep-alive连接头，我们仍然接受连接
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elif "upgrade" not in connection:
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logger.warning(f"连接头不包含upgrade: {connection}")
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# 在websockets 15.x中，连接已经在serve时验证，所以这里只记录警告
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except AttributeError:
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# websockets 15.x版本可能没有request_headers属性，跳过检查
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pass
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await self.register_client(websocket)
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try:
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async for message in websocket:
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await self.handle_message(websocket, message)
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except websockets.exceptions.ConnectionClosed:
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pass
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except Exception as e:
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logger.error(f"WebSocket连接错误: {e}")
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finally:
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await self.unregister_client(websocket)
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async def start_server(self):
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"""启动WebSocket服务器"""
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logger.info(f"启动WebSocket服务器: ws://{self.host}:{self.port}")
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# 添加CORS支持
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async def handle_client_with_cors(websocket: WebSocketServerProtocol, path: str = None):
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# CORS处理：websockets库默认允许所有来源连接
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# 如果需要限制，可以在serve时使用additional_headers参数
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await self.handle_client(websocket, path or "")
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async with websockets.serve(
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handle_client_with_cors,
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self.host,
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self.port
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):
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await asyncio.Future() # 保持服务器运行
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def _process_request(self, path, request):
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"""处理HTTP请求，支持CORS"""
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# 检查是否是WebSocket升级请求
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if request.headers.get("Upgrade", "").lower() == "websocket":
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return None # 允许WebSocket连接
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# 对于非WebSocket请求，返回简单的HTML页面
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return (
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200,
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[("Content-Type", "text/html; charset=utf-8")],
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b"""
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<!DOCTYPE html>
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<html>
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<head>
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<title>WebSocket Server</title>
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</head>
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<body>
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<h1>WebSocket Server is running</h1>
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<p>This is a WebSocket server. Please use a WebSocket client to connect.</p>
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<p>WebSocket URL: ws://localhost:8765</p>
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</body>
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</html>
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"""
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)
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def run(self):
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"""运行服务器"""
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asyncio.run(self.start_server())
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if __name__ == "__main__":
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# 设置日志
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logging.basicConfig(level=logging.INFO)
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# 启动服务器
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server = WebSocketServer()
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server.run()
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