Selenium WebDriver Python3：页面刷新至找到文本后执行自动购买

需求梳理 #

• 使用账号凭证登录https://www.alza.sk/EN/
• 按指定间隔（如60秒）刷新页面
• 检测页面中指定商品的“In stock”文本
• 库存可用时执行一系列下单操作：添加到购物车→结算→处理弹窗→选择取货门店→选择支付方式→继续

完整代码实现 #

from selenium import webdriver
from selenium.webdriver.common.by import By
from selenium.webdriver.support.ui import WebDriverWait
from selenium.webdriver.support import expected_conditions as EC
import time

# 配置信息
USERNAME = "你的账号"
PASSWORD = "你的密码"
TARGET_PRODUCT_URL = "你要监控的商品页面URL"
REFRESH_INTERVAL = 60  # 刷新间隔（秒）

def login(driver):
    # 点击登录按钮
    login_btn = WebDriverWait(driver, 10).until(
        EC.element_to_be_clickable((By.CSS_SELECTOR, "a.login"))
    )
    login_btn.click()
    
    # 输入账号密码
    username_input = WebDriverWait(driver, 10).until(
        EC.presence_of_element_located((By.ID, "login-email"))
    )
    username_input.send_keys(USERNAME)
    
    password_input = driver.find_element(By.ID, "login-password")
    password_input.send_keys(PASSWORD)
    
    # 提交登录
    submit_btn = driver.find_element(By.ID, "login-button")
    submit_btn.click()
    # 等待登录完成跳转
    time.sleep(3)

def check_stock_and_order(driver):
    while True:
        driver.refresh()
        try:
            # 检测库存状态
            stock_status = WebDriverWait(driver, 10).until(
                EC.presence_of_element_located((By.XPATH, "//*[contains(text(), 'In stock')]"))
            )
            print("商品已到货！开始下单流程")
            
            # 点击Add to cart按钮
            add_to_cart_btn = WebDriverWait(driver, 10).until(
                EC.element_to_be_clickable((By.CSS_SELECTOR, "button.addToCart"))
            )
            add_to_cart_btn.click()
            
            # 点击Proceed to Checkout
            proceed_btn = WebDriverWait(driver, 10).until(
                EC.element_to_be_clickable((By.CSS_SELECTOR, "a.btnProceedToCheckout"))
            )
            proceed_btn.click()
            
            # 点击Continue
            continue_btn = WebDriverWait(driver, 10).until(
                EC.element_to_be_clickable((By.CSS_SELECTOR, "button.btnContinue"))
            )
            continue_btn.click()
            
            # 处理弹窗：点击Do not add anything
            try:
                do_not_add_btn = WebDriverWait(driver, 5).until(
                    EC.element_to_be_clickable((By.XPATH, "//*[contains(text(), 'Do not add anything')]"))
                )
                do_not_add_btn.click()
            except:
                # 没有弹窗则跳过
                pass
            
            # 勾选Bratislava - main shop复选框
            store_checkbox = WebDriverWait(driver, 10).until(
                EC.element_to_be_clickable((By.XPATH, "//*[contains(text(), 'Bratislava - main shop')]/preceding-sibling::input"))
            )
            if not store_checkbox.is_selected():
                store_checkbox.click()
            
            # 点击Confirm your selection
            confirm_btn = WebDriverWait(driver, 10).until(
                EC.element_to_be_clickable((By.CSS_SELECTOR, "button.btnConfirm"))
            )
            confirm_btn.click()
            
            # 展开All payments option
            payments_expand_btn = WebDriverWait(driver, 10).until(
                EC.element_to_be_clickable((By.CSS_SELECTOR, "a.expandAllPaymentOptions"))
            )
            payments_expand_btn.click()
            
            # 勾选Cash / Card (when collected)
            payment_checkbox = WebDriverWait(driver, 10).until(
                EC.element_to_be_clickable((By.XPATH, "//*[contains(text(), 'Cash / Card (when collected)')]/preceding-sibling::input"))
            )
            if not payment_checkbox.is_selected():
                payment_checkbox.click()
            
            # 点击Continue
            final_continue_btn = WebDriverWait(driver, 10).until(
                EC.element_to_be_clickable((By.CSS_SELECTOR, "button.btnContinue"))
            )
            final_continue_btn.click()
            
            print("下单流程执行完成")
            break  # 完成后退出循环
            
        except:
            print("商品暂无库存，等待下一次刷新...")
            time.sleep(REFRESH_INTERVAL)

if __name__ == "__main__":
    driver = webdriver.Chrome()
    driver.maximize_window()
    
    # 打开登录页面
    driver.get("https://www.alza.sk/EN/")
    # 执行登录
    login(driver)
    # 跳转到目标商品页面
    driver.get(TARGET_PRODUCT_URL)
    # 开始监控与下单
    check_stock_and_order(driver)
    
    # 关闭浏览器（可选）
    # driver.quit()

代码说明 #

• 使用WebDriverWait替代固定等待时间，提升代码稳定性，避免页面加载慢导致的元素找不到问题
• 拆分功能为login和check_stock_and_order函数，逻辑更清晰
• 加入异常捕获，处理库存未到货的情况，持续循环刷新
• 针对可能出现的弹窗做了容错处理，避免因弹窗未出现导致代码报错
• 所有元素定位使用常见的CSS_SELECTOR和XPATH，适配页面结构变化

注意事项 #

• 请替换代码中的USERNAME、PASSWORD和TARGET_PRODUCT_URL为实际信息
• 页面元素选择器可能随网站更新变化，若运行报错需检查元素定位是否失效
• 频繁刷新可能触发网站反爬机制，建议适当调整刷新间隔

内容的提问来源于stack exchange，提问作者Syny13