域名空间到期后网站就没用了

import smtplib
from email.mime.text import MIMEText
from datetime import datetime, timedelta

# 假设域名到期日期存储在一个文件中
def get_domain_expiration(domain):
    with open(f"{domain}_expiration.txt", "r") as file:
        expiration_date_str = file.read().strip()
    return datetime.strptime(expiration_date_str, "%Y-%m-%d")

def send_reminder_email(to_email, domain, days_left):
    msg = MIMEText(f"Your domain {domain} will expire in {days_left} days.")
    msg['Subject'] = f"Domain Expiry Reminder for {domain}"
    msg['From'] = "your_email@example.com"
    msg['To'] = to_email

    smtp_server = "smtp.example.com"
    smtp_port = 587
    smtp_username = "your_email@example.com"
    smtp_password = "your_password"

    with smtplib.SMTP(smtp_server, smtp_port) as server:
        server.starttls()
        server.login(smtp_username, smtp_password)
        server.sendmail(smtp_username, to_email, msg.as_string())

def check_domain_expiration(domain):
    expiration_date = get_domain_expiration(domain)
    today = datetime.now()
    days_left = (expiration_date - today).days

    if days_left <= 30:
        send_reminder_email("admin@example.com", domain, days_left)

# 示例调用
check_domain_expiration("example.com")