const express = require('express');
const axios = require('axios');
const app = express();
const port = 3000;

// 允许跨域
app.all('*', (req, res, next) => {
  res.header('Access-Control-Allow-Origin', '*');
  res.header('Access-Control-Allow-Headers', '*');
  res.header('Access-Control-Allow-Methods', '*');
  next();
});

// 代理接口
app.get('/api', async (req, res) => {
  const { url } = req.query;
  if (!url) return res.send('请传入url参数');

  try {
    const response = await axios.get(url, {
      headers: {
        'User-Agent': 'Mozilla/5.0'
      }
    });
    res.send(response.data);
  } catch (err) {
    res.status(500).send('请求失败：' + err.message);
  }
});

app.listen(port, () => {
  console.log(`代理服务器运行在 http://localhost:${port}`);
});