如何在express js的用户生成内容站点上生成站点地图？

npm install sitemap

const express = require('express');
const router = express.Router();
const { SitemapStream, streamToPromise } = require('sitemap');

router.get('/sitemap.xml', async (req, res) => {
  try {
    const smStream = new SitemapStream({ hostname: 'https://example.com' }); // 替换为你的站点主机名

    // 添加站点首页
    smStream.write({ url: '/', changefreq: 'daily', priority: 1 });

    // 添加内容页面
    content.forEach((page) => {
      smStream.write({ url: `/content/${page.id}`, changefreq: 'weekly', priority: 0.8 });
    });

    smStream.end();

    const sitemap = await streamToPromise(smStream);
    res.header('Content-Type', 'application/xml');
    res.send(sitemap);
  } catch (error) {
    console.error(error);
    res.status(500).end();
  }
});

const sitemapRouter = require('./routes/sitemap');
app.use('/', sitemapRouter);