#coding=utf-8
import requests    # 导入 requests 库，用于向网站发送请求
import yagmail    # 导入 yagmail 库，用于发送邮件
import time    # 导入 time 库，用于设置监控间隔

# Email configuration
SMTP_SERVER = 'smtp.qq.com'    # 邮箱 SMTP 服务器地址
SMTP_PORT = 465    # 邮箱 SMTP 服务器端口
SMTP_USERNAME = 'your_email@gmail.com'    # 邮箱用户名
SMTP_PASSWORD = 'your_email_password'    # 邮箱密码或授权码
SMTP_FROM = 'your_email@gmail.com'    # 发件人邮箱地址
SMTP_TO = 'recipient_email@gmail.com'    # 收件人邮箱地址

# 设置要监控的网站 URL
WEBSITE_URLS = ["https://www.example.com"]

# 邮箱告警设置
def send_email(subject, message):
   yag = yagmail.SMTP(SMTP_USERNAME, SMTP_PASSWORD, SMTP_SERVER, SMTP_PORT, smtp_ssl=True)    # 初始化 yagmail.SMTP 对象
   yag.send(to=SMTP_TO, subject=subject, contents=message)    # 发送邮件

# Function to check website status
def check_website(url):
    try:
        response = requests.get(url)    # 向网站发送 GET 请求
        return response.status_code    # 返回响应状态码
    except requests.exceptions.RequestException as e:
        print(e)
        return None

# Main loop to monitor website status
website_statuses = {}    # 创建一个字典来保存网站的状态
while True:    # 进入无限循环
    for url in WEBSITE_URLS:    # 遍历要监控的网站 URL
        status = check_website(url)    # 获取网站的状态码
        if url not in website_statuses:    # 如果网站 URL 不在字典中，添加到字典中
            website_statuses[url] = None

        if status == website_statuses[url]:    # 如果状态码未发生变化，打印日志信息
            print('Website {} status unchanged: {}'.format(url, status))
        else:    # 如果状态码发生变化
            if status == 200:    # 如果状态码为 200，表示网站正常
                website_statuses[url] = status
                print('Website {} status changed to: {}'.format(url, status))
            else:    # 如果状态码不为 200，表示网站出现问题，发送邮件告警
                print('Website {} status changed to: {}'.format(url, status))
                message = 'Website {} status changed to {}'.format(url, status)
                send_email('Website status change notification', message)

    time.sleep(60)    # 设置监控间隔为 60 秒，每隔 60 秒执行一次```