diff --git a/ws/ws.py b/ws/ws.py index 7ff84fa..abc02d5 100644 --- a/ws/ws.py +++ b/ws/ws.py @@ -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: