持续监测网络状态

import os
import platform
import subprocess
import time
from datetime import datetime

# 配置参数
TARGET = "8.8.8.8"  # 监测目标（IP/域名）
CHECK_INTERVAL = 5  # 监测间隔（秒）
LOG_FILE = "network_log.txt"  # 日志文件路径
def ping(target):
  """执行 Ping 测试，返回是否成功（隐藏详细输出）"""
  param = "-n 1" if platform.system().lower() == "windows" else "-c 1"
  command = f"ping {param} {target}"
  # 屏蔽 Ping 的输出（Windows 和 Linux/macOS 兼容）
  with open(os.devnull, 'w') as devnull:
      response = subprocess.call(command, stdout=devnull, stderr=devnull)
    return response == 0

def beep():
    """触发系统蜂鸣声（Windows/Linux/macOS 兼容）"""
    try:
        if platform.system() == "Windows":
            import winsound
            winsound.Beep(1000, 500)  # 频率 1000Hz，持续 500ms
        else:
            print("\a")  # Linux/macOS 终端响铃
    except:
        pass

def log_event(message):
    """记录事件到日志文件"""
    timestamp = datetime.now().strftime("%Y-%m-%d %H:%M:%S")
    log_line = f"[{timestamp}] {message}\n"
    with open(LOG_FILE, "a") as f:
        f.write(log_line)

def main():
    log_event("=== network check start ===")
    last_status = None
    try:
        while True:
            is_online = ping(TARGET)
            current_time = datetime.now().strftime("%H:%M:%S")
            if is_online:
                status = "在线"
                if last_status == "离线":
                    log_event("network restart!")
            else:
                status = "离线"
                beep()  # 断网报警
                if last_status != "离线":
                    log_event("network close!")
            # 动态刷新控制台输出（一行显示）
            print(f"\r当前状态: {status} | 检测时间: {current_time}", end="", flush=True)
            last_status = status
            time.sleep(CHECK_INTERVAL)
    except KeyboardInterrupt:
        log_event("=== stop check ===")
        print("\n监测已停止。日志已保存至:", LOG_FILE)

if __name__ == "__main__":
    main()