feat: implement social previews by redirecting to origin server (#1144)

plugins/social.server.ts

@@ -0,0 +1,16 @@
+import { sendRedirect } from 'h3'
+
+export default defineNuxtPlugin(async (nuxtApp) => {
+  const route = useRoute()
+  if (!route.params.server)
+    return
+
+  const req = nuxtApp.ssrContext!.event.node.req
+  const userAgent = req.headers['user-agent']!
+  if (!userAgent)
+    return
+
+  const isOpenGraphCrawler = /twitterbot|discordbot|facebookexternalhit|googlebot|msnbot|baidu|ahrefsbot|duckduckgo/i.test(userAgent)
+  if (isOpenGraphCrawler)
+    await sendRedirect(nuxtApp.ssrContext!.event, `https:/${route.path}`, 301)
+})