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