feat: support sitemap reverse proxy

next.config.mjs

@@ -53,7 +53,12 @@ let configs = {
   },
   async rewrites() {
     return {
-      beforeFiles: [{ source: '/feed', destination: '/api/feed' }],
+      beforeFiles: [
+        { source: '/feed', destination: '/api/feed' },
+        { source: '/atom.xml', destination: '/api/feed' },
+        { source: '/sitemap', destination: '/api/sitemap' },
+        { source: '/sitemap.xml', destination: '/api/sitemap' },
+      ],
       fallback: [
         { source: '/:page*/:slug*', destination: '/posts/:page*/:slug*' },
       ],

src/pages/api/sitemap/index.tsx

@@ -0,0 +1,26 @@
+import type { NextApiResponse } from 'next'
+
+import { apiClient } from '~/utils/client'
+
+export default async function handler(_, res: NextApiResponse) {
+  const { data } = await apiClient.aggregate.proxy.sitemap.get<{
+    data: { url: string; publishedAt: string }[]
+  }>()
+
+  const xml = `
+  <urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9" xmlns:news="http://www.google.com/schemas/sitemap-news/0.9" xmlns:xhtml="http://www.w3.org/1999/xhtml" xmlns:image="http://www.google.com/schemas/sitemap-image/1.1" xmlns:video="http://www.google.com/schemas/sitemap-video/1.1">
+  ${data
+    .map(
+      (item: any) => `<url>
+  <loc>${item.url}</loc>
+  <lastmod>${item.publishedAt || 'N/A'}</lastmod>
+  </url>`,
+    )
+
+    .join('')}
+  </urlset>
+  `.trim()
+
+  res.setHeader('Content-Type', 'application/xml')
+  return res.send(xml)
+}