devblog/src/pages/rss.xml.js

import rss from "@astrojs/rss";
import { getCollection } from "astro:content";
import getSortedPosts from "@/utils/getSortedPosts";
import sanitizeHtml from "sanitize-html";
import MarkdownIt from "markdown-it";
import { SITE } from "@/config";

const parser = new MarkdownIt();

export async function GET() {
  const posts = await getCollection("blog");
  const sortedPosts = getSortedPosts(posts);
  return rss({
    title: SITE.title,
    description: SITE.desc,
    site: SITE.website,
    items: sortedPosts.map(({ data, id }) => ({
      link: `posts/${id}/`,
      content: sanitizeHtml(parser.render(posts.body), {
        allowedTags: sanitizeHtml.defaults.allowedTags.concat(["img"]),
      }),
      title: data.title,
      description: data.description,
      pubDate: new Date(data.modDatetime ?? data.pubDatetime),
      customData: `<summary>${posts.frontmatter.description}</summary>`,
    })),
  });
}