Post to Bluesky using the AT Protocol API

bsky.ts

/**
 * Put BSKY_USERNAME and BSKY_PASSWORD in your .env file and then run:
 *   deno run --allow-net bsky.ts "Hello, world!"
 */

import "jsr:@std/dotenv/load";

const getToken = async () => {
  const body = JSON.stringify({
    identifier: Deno.env.get("BSKY_USERNAME"),
    password: Deno.env.get("BSKY_PASSWORD"),
  });
  const response = await fetch(
    `https://bsky.social/xrpc/com.atproto.server.createSession`,
    {
      method: "POST",
      headers: {
        "Content-Type": "application/json",
      },
      body,
    }
  );
  const data = await response.json();
  return {
    did: data.did,
    accessJwt: data.accessJwt,
    refreshJwt: data.refreshJwt,
  };
};

const createPost = async (token: string, did: string, post: string) => {
  const body = JSON.stringify({
    repo: did,
    collection: "app.bsky.feed.post",
    record: {
      text: post,
      createdAt: new Date().toISOString(),
    },
  });
  const response = await fetch(
    `https://bsky.social/xrpc/com.atproto.repo.createRecord`,
    {
      method: "POST",
      headers: {
        "Content-Type": "application/json",
        Authorization: `Bearer ${token}`,
      },
      body,
    }
  );
  return await response.json();
};

if (import.meta.main) {
  if (Deno.args.length !== 1) {
    console.log('Usage: deno run --allow-net bsky.ts "Hello, world!"');
  } else {
    const token = await getToken();
    const response = await createPost(token.accessJwt, token.did, Deno.args[0]);
    console.log("Posted:", response);
  }
}

export { getToken, createPost };