如何利用Python监控别人的网站

import requests
from bs4 import BeautifulSoup
import smtplib
from email.mime.text import MIMEText

# 网站 URL
url = "https://"

# 发送邮件的参数
sender = '你的发件人邮箱'
receiver = '你的收件人邮箱'
smtp_server = 'smtp.xxx.com' # 发件人邮箱的 SMTP 服务器地址
smtp_port = 465 # 发件人邮箱的 SMTP 端口
username = '你的发件人邮箱'
password = '你的发件人邮箱密码'

def send_email(subject, body):
    # 创建 MIMEText 邮件
    msg = MIMEText(body)
    msg['Subject'] = subject
    msg['From'] = sender
    msg['To'] = receiver

    # 发送邮件
    with smtplib.SMTP_SSL(smtp_server, smtp_port) as server:
        server.login(username, password)
        server.sendmail(sender, receiver, msg.as_string())

def get_product_info(product_url):
    # 获取商品信息
    response = requests.get(product_url)
    soup = BeautifulSoup(response.text, 'html.parser')
    title = soup.find('h1', class_='h3').text
    price = soup.find('span', class_='h2').text
    stock = soup.find('span', class_='js-product-stock').text
    return (title, price, stock)

def check_product_sold_out(product_url):
    # 检查商品是否已售出
    response = requests.get(product_url)
    soup = BeautifulSoup(response.text, 'html.parser')
    if soup.find('div', class_='product-sold-out'):
        return True
    else:
        return False

# 定期检查商品
while True:
    # 获取网页内容
    response = requests.get(url)
    soup = BeautifulSoup(response.text, 'html.parser')

    # 查找商品列表
    product_list = soup.find('div', class_='js-product-list')

    # 检查每个商品是否售出
    for product in product_list.find_all('a', class_='product-card'):
        product_url = product['href']
        product_title = product.find('h2').text
        if check_product_sold_out(product_url):
            # 商品已售出，发送邮件通知
            subject = f'商品已售出：{product_title}'
            body = f'商品名称：{product_title}\n'
            send_email(subject, body)
        else:
            # 商品未售出，检查是否为新商品
            try:
                # 尝试获取商品信息，如果获取失败则说明是新商品
                product_title, product_price, product_stock = get_product_info(product_url)
            except:
                # 新商品，发送邮件通知
                subject = f'新商品上架：{product_title}'
                body = f'商品名称：{product_title}\n库存：{product_stock}\n价格：{product_price}\n'
                send_email(subject, body)

    # 等待一段时间后再次检查
    time.sleep(300)

import requests
import hashlib
import time
import smtplib
from email.mime.text import MIMEText

url = 'https://'

def get_hash(url):
    response = requests.get(url)
    return hashlib.sha256(response.content).hexdigest()

def send_email(content):
    sender = ''
    receiver = ''
    password = ''
    smtp_server = ''
    smtp_port = 465

    message = MIMEText(content)
    message['From'] = sender
    message['To'] = receiver
    message['Subject'] = 'Website Change Alert'

    server = smtplib.SMTP_SSL(smtp_server, smtp_port)
    server.login(sender, password)
    server.sendmail(sender, receiver, message.as_string())
    server.quit()

current_hash = get_hash(url)
while True:
    new_hash = get_hash(url)
    if new_hash != current_hash:
        send_email('Website content has changed.')
        current_hash = new_hash
    else:
        time.sleep(30)