54 lines
2.0 KiB
Python
54 lines
2.0 KiB
Python
"""
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WebSocket连接管理模块
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负责管理WebSocket连接和广播消息
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"""
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import asyncio
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import logging
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from typing import List
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from fastapi import WebSocket
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logger = logging.getLogger(__name__)
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class ConnectionManager:
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def __init__(self):
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self.active_connections: List[WebSocket] = []
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self._lock = asyncio.Lock() # 添加锁以保护连接列表
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async def connect(self, websocket: WebSocket):
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await websocket.accept()
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async with self._lock:
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# 检查连接是否已经存在，如果存在则不重复添加
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if websocket not in self.active_connections:
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self.active_connections.append(websocket)
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logger.info(f"WebSocket客户端连接，当前连接数: {len(self.active_connections)}")
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async def disconnect(self, websocket: WebSocket):
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async with self._lock:
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# 安全移除连接，如果不存在则忽略
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if websocket in self.active_connections:
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self.active_connections.remove(websocket)
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logger.info(f"WebSocket客户端断开，当前连接数: {len(self.active_connections)}")
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async def broadcast(self, data):
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"""向所有连接的客户端广播数据"""
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async with self._lock:
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# 复制列表以避免在迭代时修改
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connections = self.active_connections.copy()
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# 在锁外处理发送操作
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disconnect_list = []
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for connection in connections:
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try:
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await connection.send_json(data)
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except Exception as e:
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logger.error(f"发送消息失败: {e}")
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disconnect_list.append(connection)
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# 移除断开的连接
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if disconnect_list:
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async with self._lock:
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for conn in disconnect_list:
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if conn in self.active_connections:
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self.active_connections.remove(conn)
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logger.info(f"移除断开的连接，剩余连接数: {len(self.active_connections)}")
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