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							| @ -19,13 +19,11 @@ class ClientConnection: | ||||
|     def update_heartbeat(self): | ||||
|         """更新心跳时间为当前时间""" | ||||
|         self.last_heartbeat = datetime.datetime.now() | ||||
|         # 打印心跳更新日志 | ||||
|         print(f"[{datetime.datetime.now():%Y-%m-%d %H:%M:%S}] 客户端 {self.client_ip} 心跳时间已更新") | ||||
|  | ||||
|     def is_alive(self, timeout_seconds: int = 60) -> bool: | ||||
|         """检查客户端是否活跃(心跳超时阈值:60秒)""" | ||||
|         timeout = (datetime.datetime.now() - self.last_heartbeat).total_seconds() | ||||
|         # 打印心跳检查明细(便于排查超时原因) | ||||
|         print(f"[{datetime.datetime.now():%Y-%m-%d %H:%M:%S}] 客户端 {self.client_ip} 心跳检查:" | ||||
|               f"上次心跳距今 {timeout:.1f} 秒(阈值:{timeout_seconds}秒)") | ||||
|         return timeout < timeout_seconds | ||||
| @ -57,14 +55,12 @@ async def heartbeat_checker(): | ||||
|             for client_ip in timeout_clients: | ||||
|                 try: | ||||
|                     connection = connected_clients[client_ip] | ||||
|                     # 直接关闭连接(不发送任何通知) | ||||
|                     await connection.websocket.close(code=1008, reason="心跳超时(>60秒)") | ||||
|                     print(f"[{current_time:%Y-%m-%d %H:%M:%S}] 客户端 {client_ip} 已关闭(超时)") | ||||
|                 except Exception as e: | ||||
|                     print( | ||||
|                         f"[{current_time:%Y-%m-%d %H:%M:%S}] 关闭客户端 {client_ip} 失败:{str(e)}(错误类型:{type(e).__name__})") | ||||
|                 finally: | ||||
|                     # 确保从客户端列表中移除(无论关闭是否成功) | ||||
|                     if client_ip in connected_clients: | ||||
|                         del connected_clients[client_ip] | ||||
|                         print(f"[{current_time:%Y-%m-%d %H:%M:%S}] 客户端 {client_ip} 已从连接列表移除") | ||||
| @ -79,15 +75,13 @@ async def heartbeat_checker(): | ||||
| async def lifespan(app: FastAPI): | ||||
|     """应用生命周期管理:启动时创建心跳任务、关闭时取消任务""" | ||||
|     global heartbeat_task | ||||
|     # 启动阶段:创建心跳检查任务 | ||||
|     heartbeat_task = asyncio.create_task(heartbeat_checker()) | ||||
|     print(f"[{datetime.datetime.now():%Y-%m-%d %H:%M:%S}] 心跳检查任务已启动(任务ID:{id(heartbeat_task)})") | ||||
|     yield  # 应用运行中 | ||||
|     # 关闭阶段:取消心跳任务 | ||||
|     if heartbeat_task and not heartbeat_task.done(): | ||||
|         heartbeat_task.cancel() | ||||
|         try: | ||||
|             await heartbeat_task  # 等待任务优雅退出 | ||||
|             await heartbeat_task | ||||
|         except asyncio.CancelledError: | ||||
|             print(f"[{datetime.datetime.now():%Y-%m-%d %H:%M:%S}] 心跳检查任务已正常取消") | ||||
|         except Exception as e: | ||||
| @ -100,7 +94,6 @@ async def send_heartbeat_ack(client_ip: str, client_timestamp: Any) -> bool: | ||||
|         print(f"[{datetime.datetime.now():%Y-%m-%d %H:%M:%S}] 回复心跳失败:客户端 {client_ip} 不在连接列表中") | ||||
|         return False | ||||
|  | ||||
|     # 修复:将这部分代码移出if语句块、确保始终定义ack_msg | ||||
|     # 服务端当前格式化时间戳(字符串类型、与日志时间格式匹配) | ||||
|     server_latest_timestamp = datetime.datetime.now().strftime("%Y-%m-%d %H:%M:%S") | ||||
|     ack_msg = { | ||||
| @ -117,13 +110,51 @@ async def send_heartbeat_ack(client_ip: str, client_timestamp: Any) -> bool: | ||||
|     except Exception as e: | ||||
|         print( | ||||
|             f"[{datetime.datetime.now():%Y-%m-%d %H:%M:%S}] 回复客户端 {client_ip} 心跳失败:{str(e)}(错误类型:{type(e).__name__})") | ||||
|         # 发送失败时移除客户端(避免无效连接残留) | ||||
|         if client_ip in connected_clients: | ||||
|             del connected_clients[client_ip] | ||||
|             print(f"[{datetime.datetime.now():%Y-%m-%d %H:%M:%S}] 客户端 {client_ip} 因心跳回复失败被移除") | ||||
|         return False | ||||
|  | ||||
|  | ||||
| # 新增:向指定客户端发送消息的方法 | ||||
| async def send_message_to_client(client_ip: str, message: Dict[str, Any]) -> bool: | ||||
|     """ | ||||
|     向指定客户端IP发送JSON消息(需确保客户端已在连接列表中) | ||||
|  | ||||
|     :param client_ip: 目标客户端IP(必须与`connected_clients`中的key完全一致,如"192.168.1.100") | ||||
|     :param message: 待发送的JSON消息(需为Dict类型,FastAPI会自动序列化为JSON字符串) | ||||
|     :return: 发送成功返回True,失败(客户端不存在/发送异常)返回False | ||||
|     """ | ||||
|     current_time = datetime.datetime.now() | ||||
|     # 1. 校验客户端是否在线 | ||||
|     if client_ip not in connected_clients: | ||||
|         print( | ||||
|             f"[{current_time:%Y-%m-%d %H:%M:%S}] 发送消息失败:客户端 {client_ip} 不在连接列表中(当前在线数:{len(connected_clients)})") | ||||
|         return False | ||||
|  | ||||
|     try: | ||||
|         # 2. 获取客户端连接实例并发送消息 | ||||
|         client_conn = connected_clients[client_ip] | ||||
|         await client_conn.websocket.send_json(message) | ||||
|  | ||||
|         # 3. 打印发送成功日志(格式化消息便于查看) | ||||
|         formatted_msg = json.dumps(message, ensure_ascii=False, indent=2) | ||||
|         print(f"[{current_time:%Y-%m-%d %H:%M:%S}] 已向客户端 {client_ip} 发送消息:\n{formatted_msg}") | ||||
|         return True | ||||
|  | ||||
|     except Exception as e: | ||||
|         # 4. 处理发送异常(如网络中断、客户端已离线但未被清理) | ||||
|         error_msg = f"[{current_time:%Y-%m-%d %H:%M:%S}] 向客户端 {client_ip} 发送消息失败:{str(e)}(错误类型:{type(e).__name__})" | ||||
|         print(error_msg) | ||||
|  | ||||
|         # 5. 清理无效连接(避免僵尸连接残留) | ||||
|         if client_ip in connected_clients: | ||||
|             del connected_clients[client_ip] | ||||
|             print(f"[{current_time:%Y-%m-%d %H:%M:%S}] 客户端 {client_ip} 因发送异常已从连接列表移除") | ||||
|  | ||||
|         return False | ||||
|  | ||||
|  | ||||
| @ws_router.websocket("/ws") | ||||
| async def websocket_endpoint(websocket: WebSocket): | ||||
|     """WebSocket核心端点:处理连接建立/消息接收/连接关闭""" | ||||
| @ -150,7 +181,6 @@ async def websocket_endpoint(websocket: WebSocket): | ||||
|  | ||||
|         # 4. 循环接收客户端消息(持续监听) | ||||
|         while True: | ||||
|             # 接收原始文本消息(避免提前解析JSON、便于日志打印) | ||||
|             raw_data = await websocket.receive_text() | ||||
|             recv_time = datetime.datetime.now() | ||||
|             print(f"\n[{recv_time:%Y-%m-%d %H:%M:%S}] 收到客户端 {client_ip} 的消息:{raw_data}") | ||||
| @ -163,33 +193,26 @@ async def websocket_endpoint(websocket: WebSocket): | ||||
|  | ||||
|                 # 5. 区分消息类型:仅处理心跳、其他消息不回复 | ||||
|                 if message.get("type") == "heartbeat": | ||||
|                     # 验证心跳消息是否包含timestamp字段 | ||||
|                     client_timestamp = message.get("timestamp") | ||||
|                     if client_timestamp is None: | ||||
|                         print(f"[{recv_time:%Y-%m-%d %H:%M:%S}] 警告:客户端 {client_ip} 发送的心跳缺少'timestamp'字段") | ||||
|                         continue  # 不回复无效心跳 | ||||
|                         continue | ||||
|  | ||||
|                     # 更新心跳时间 + 回复心跳确认 | ||||
|                     new_connection.update_heartbeat() | ||||
|                     await send_heartbeat_ack(client_ip, client_timestamp) | ||||
|                 else: | ||||
|                     # 非心跳消息:仅打印日志、不回复任何内容 | ||||
|                     print(f"[{recv_time:%Y-%m-%d %H:%M:%S}] 非心跳消息(类型:{message.get('type')})、不回复") | ||||
|  | ||||
|             except json.JSONDecodeError as e: | ||||
|                 # JSON格式错误:仅打印日志、不回复 | ||||
|                 print(f"[{recv_time:%Y-%m-%d %H:%M:%S}] 客户端 {client_ip} 消息格式错误:无效JSON(错误:{str(e)})") | ||||
|             except Exception as e: | ||||
|                 # 其他未知错误:仅打印日志、不回复 | ||||
|                 print( | ||||
|                     f"[{recv_time:%Y-%m-%d %H:%M:%S}] 处理客户端 {client_ip} 消息时出错:{str(e)}(错误类型:{type(e).__name__})") | ||||
|  | ||||
|     except WebSocketDisconnect as e: | ||||
|         # 客户端主动断开连接(如关闭页面、网络中断) | ||||
|         print( | ||||
|             f"\n[{datetime.datetime.now():%Y-%m-%d %H:%M:%S}] 客户端 {client_ip} 主动断开连接(代码:{e.code}、原因:{e.reason})") | ||||
|     except Exception as e: | ||||
|         # 其他连接级错误(如网络异常) | ||||
|         print( | ||||
|             f"\n[{datetime.datetime.now():%Y-%m-%d %H:%M:%S}] 客户端 {client_ip} 连接异常:{str(e)}(错误类型:{type(e).__name__})") | ||||
|     finally: | ||||
|  | ||||
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