Cross posting from a next.js blog to micro.blog

I like the idea of micro.blog, and I’ve lazily cross-posted my blog to the site via RSS for a while, but the feed always ended up in the format of [post title] - [link to post], which doesn’t capture the spirt of microblogging.

I reworked the RSS feed in general when updating this site to next.js, but I thought I'd take a stab at getting micro.blog crossposting working too.

Since I couldn’t find much in their documentation on what parameters were used to construct the micro.blog feed from an RSS feed, I found users who were cross posting, looked at their feeds, and then tested out a couple posts to see how they showed up on the timeline.

Notes:

1. It's much easier to use a JSON feed. This is perhaps not surprising since Manton Reece drafted the spec and created micro.blog.
2. Microblogging is strongly against using titles for posts.

I ended up taking the same loop my index page uses (gets every single markdown post, but then returns the latest ten) and running it through this function:

1import siteConfig from "../data/config.json";
2var md = require("markdown-it")();
3
4const makeJsonFeed = (posts) => {
5 const feed = {
6   feed_url: siteConfig.jsonURL,
7   title: siteConfig.description,
8   home_page_url: siteConfig.siteUrl,
9   author: {
10     url: siteConfig.siteUrl,
11     name: siteConfig.author,
12   },
13 };
14 const items = posts.map((post) => {
15   return {
16     author: {
17       url: siteConfig.siteUrl,
18       name: siteConfig.author,
19     },
20     id: `${siteConfig.siteURL}${post.slug}`,
21     url: `${siteConfig.siteURL}${post.slug}`,
22     date_published: post.frontmatter.date,
23     content_html: md.render(post.markdownBody),
24   };
25 });
26 feed.items = items;
27
28 return JSON.stringify(feed);
29};
30
31export default makeJsonFeed;

And on the index route, I use it like this:

1const jsonFeedObj = makeJsonFeed(postsToUse);
2fs.writeFileSync("./public/rss/feed.json", jsonFeedObj);

While I do have titles on most of my posts, they are optional, and I chose to leave them off the JSON feed. If they are added, micro.blog goes back to the [post title] - [link to post] I was trying to get away from!

You can see the result at my micro.blog timeline or in the JSON feed.