计算云服务器年末促销

// 示例代码：使用CDN加速页面加载
const express = require('express');
const app = express();

app.use(express.static('public', { maxAge: '1d' }));

app.listen(3000, () => {
  console.log('Server is running on port 3000');
});

# 示例代码：使用第三方库生成和验证验证码
from captcha.image import ImageCaptcha
import random

def generate_captcha():
    image = ImageCaptcha(width=280, height=90)
    captcha_text = ''.join(random.choices('ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789', k=6))
    data = image.generate(captcha_text)
    return captcha_text, data

def verify_captcha(user_input, captcha_text):
    return user_input.upper() == captcha_text

// 示例代码：设置支付请求的超时时间
import java.net.HttpURLConnection;
import java.net.URL;

public class PaymentClient {
    public static void main(String[] args) throws Exception {
        URL url = new URL("https://payment.api.com/process");
        HttpURLConnection connection = (HttpURLConnection) url.openConnection();
        connection.setConnectTimeout(5000); // 5秒连接超时
        connection.setReadTimeout(10000); // 10秒读取超时
        // 处理支付请求
    }
}