npm install express ali-oss

yarn add express ali-oss

// router_oss.js

const express = require('express');
const router = express.Router();
const OSS = require('ali-oss');

// 创建 OSS 客户端实例
const client = new OSS({
  region: 'oss-cn-hangzhou',
  accessKeyId: 'your_access_key_id',
  accessKeySecret: 'your_access_key_secret',
  bucket: 'your_bucket_name'
});

// 处理文件下载请求
router.get(/^\/(.+)/, async (req, res) => {
  const filename = req.params[0];

  try {
    // 生成文件下载链接
    const result = await client.signatureUrl(filename, { expires: 3600 });
    // 重定向到文件下载链接
    res.redirect(result);
  } catch (err) {
    console.error('Error:', err);
    res.status(500).send('Internal Server Error');
  }
});

module.exports = router;

// app.js 或 index.js

const express = require('express');
const app = express();
const routerOSS = require('./router_oss'); // 替换成你的路由模块文件路径

// 将 OSS 路由挂载到根路径下
app.use('/', routerOSS);

// 启动服务器
const port = 3000; // 你想要监听的端口号
app.listen(port, () => {
  console.log(`Server is running on port ${port}`);
});