bun-activitypub/src/index.ts

import { ACCOUNT, ACTOR, HOSTNAME, PORT } from "./env";
import admin from './admin'
import activitypub from "./activitypub";
import { fetchObject } from "./request";

const server = Bun.serve({
  port: 3000,
  fetch(req: Request): Response | Promise<Response> {
    const url = new URL(req.url)

    console.log(`${new Date().toISOString()} ${req.method} ${req.url}`)

    if(req.method === "GET" && url.pathname === "/.well-known/webfinger") {
      return webfinger(req, url.searchParams.get("resource"))
    }
    else if(req.method === "GET" && url.pathname === "/fetch") {
      const object_url = url.searchParams.get('url')
      if(!object_url) return new Response("No url supplied", { status: 400})

      return fetchObject(ACTOR, object_url)
    }

    return admin(req) || activitypub(req) || new Response("How did we get here?", { status: 404 })
  },
});

const webfinger = async (req: Request, resource: string | null) => {

  if(resource !== `acct:${ACCOUNT}@${HOSTNAME}`) return new Response("", { status: 404 })

  return Response.json({
    subject: `acct:${ACCOUNT}@${HOSTNAME}`,
    aliases: [ACTOR],
    links: [
      {
        "rel": "http://webfinger.net/rel/profile-page",
        "type": "text/html",
        "href": ACTOR
      },
      {
        rel: "self",
        type: "application/activity+json",
        href: ACTOR,
      },
    ],
  }, { headers: { "content-type": "application/activity+json" }})
}
  
console.log(`Listening on http://localhost:${server.port} ...`);