ajax二级域名

// 服务器端示例（Node.js/Express）
app.use((req, res, next) => {
  res.header('Access-Control-Allow-Origin', '*');
  res.header('Access-Control-Allow-Methods', 'GET, POST, PUT, DELETE, OPTIONS');
  res.header('Access-Control-Allow-Headers', 'Content-Type, Authorization');
  next();
});

// 客户端示例
function handleResponse(data) {
  console.log(data);
}

var script = document.createElement('script');
script.src = 'https://api.subdomain.example.com/data?callback=handleResponse';
document.body.appendChild(script);

// 代理服务器示例（Node.js/Express）
const express = require('express');
const axios = require('axios');
const app = express();

app.get('/proxy', async (req, res) => {
  try {
    const response = await axios.get('https://api.subdomain.example.com/data');
    res.send(response.data);
  } catch (error) {
    res.status(500).send(error.message);
  }
});

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