Start building blog RSS feed

Signed-off-by: Julius Volz <julius.volz@gmail.com>

package-lock.json

@@ -16,6 +16,7 @@
         "@tabler/icons-react": "^3.31.0",
         "@types/semver": "^7.7.0",
         "dayjs": "^1.11.13",
+        "feed": "^5.0.1",
         "gray-matter": "^4.0.3",
         "hast-util-from-html": "^2.0.3",
         "hast-util-select": "^6.0.4",
@@ -4737,6 +4738,19 @@
         "url": "https://github.com/sponsors/wooorm"
       }
     },
+    "node_modules/feed": {
+      "version": "5.0.1",
+      "resolved": "https://registry.npmjs.org/feed/-/feed-5.0.1.tgz",
+      "integrity": "sha512-kOveKLHucVZ6RI91bdWAts9O0L1N2mGzRGVCDQPRnHh4HmgqLdN66Cp/5dMeJZGn/qnBslWliwX37FEBq8DCIA==",
+      "license": "MIT",
+      "dependencies": {
+        "xml-js": "^1.6.11"
+      },
+      "engines": {
+        "node": ">=20",
+        "pnpm": ">=10"
+      }
+    },
     "node_modules/file-entry-cache": {
       "version": "8.0.0",
       "resolved": "https://registry.npmjs.org/file-entry-cache/-/file-entry-cache-8.0.0.tgz",
@@ -8606,6 +8620,12 @@
       "dev": true,
       "license": "MIT"
     },
+    "node_modules/sax": {
+      "version": "1.4.1",
+      "resolved": "https://registry.npmjs.org/sax/-/sax-1.4.1.tgz",
+      "integrity": "sha512-+aWOz7yVScEGoKNd4PA10LZ8sk0A/z5+nXQG5giUO5rprX9jgYsTdov9qCchZiPIZezbZH+jRut8nPodFAX4Jg==",
+      "license": "ISC"
+    },
     "node_modules/scheduler": {
       "version": "0.26.0",
       "resolved": "https://registry.npmjs.org/scheduler/-/scheduler-0.26.0.tgz",
@@ -9942,6 +9962,18 @@
       "dev": true,
       "license": "ISC"
     },
+    "node_modules/xml-js": {
+      "version": "1.6.11",
+      "resolved": "https://registry.npmjs.org/xml-js/-/xml-js-1.6.11.tgz",
+      "integrity": "sha512-7rVi2KMfwfWFl+GpPg6m80IVMWXLRjO+PxTq7V2CDhoGak0wzYzFgUY2m4XJ47OGdXd8eLE8EmwfAmdjw7lC1g==",
+      "license": "MIT",
+      "dependencies": {
+        "sax": "^1.2.4"
+      },
+      "bin": {
+        "xml-js": "bin/cli.js"
+      }
+    },
     "node_modules/yocto-queue": {
       "version": "0.1.0",
       "resolved": "https://registry.npmjs.org/yocto-queue/-/yocto-queue-0.1.0.tgz",

package.json

@@ -22,6 +22,7 @@
     "@tabler/icons-react": "^3.31.0",
     "@types/semver": "^7.7.0",
     "dayjs": "^1.11.13",
+    "feed": "^5.0.1",
     "gray-matter": "^4.0.3",
     "hast-util-from-html": "^2.0.3",
     "hast-util-select": "^6.0.4",

src/app/blog/feed.xml/route.ts

@@ -0,0 +1,57 @@
+import { getAllPosts } from "@/blog-helpers";
+import { Feed } from "feed";
+import docsConfig from "../../../../docs-config";
+
+export const dynamic = "force-static";
+export async function GET() {
+  const allPosts = getAllPosts();
+  allPosts.sort(
+    (a, b) =>
+      new Date(b.frontmatter.created_at).valueOf() -
+      new Date(a.frontmatter.created_at).valueOf()
+  );
+
+  const feed = new Feed({
+    title: "Prometheus Blog",
+    description: "The Prometheus blog",
+    id: `${docsConfig.siteUrl}/`,
+    link: `${docsConfig.siteUrl}/blog/`,
+    copyright: `Prometheus Authors ${new Date().getFullYear()}`,
+    language: "en",
+    updated: allPosts[0].frontmatter.created_at,
+    author: {
+      name: "Prometheus Authors",
+      link: `${docsConfig.siteUrl}/blog/`,
+    },
+    favicon: "TODO",
+    image: "TODO",
+    feedLinks: {
+      atom: `${docsConfig.siteUrl}/blog/feed.xml`,
+    },
+  });
+
+  allPosts.forEach(({ frontmatter, path }) => {
+    feed.addItem({
+      title: frontmatter.title,
+      id: `${docsConfig.siteUrl}${path}`,
+      link: `${docsConfig.siteUrl}${path}`,
+      description: frontmatter.excerpt,
+      date: new Date(frontmatter.created_at),
+      published: new Date(frontmatter.created_at),
+      author: [
+        {
+          name: frontmatter.author_name,
+          link: `${docsConfig.siteUrl}/blog/`,
+        },
+      ],
+      // TODO: Include rendered Markdown as content.
+    });
+  });
+  const xml = feed.atom1();
+  return new Response(xml, {
+    headers: {
+      "Content-Type": "application/atom+xml",
+      "Cache-Control": "s-maxage=3600, stale-while-revalidate=59",
+    },
+  });
+}