Matrix Federation with Cloudflare Workers

Setting Up Matrix on Cloudflare Workers

Cloudflare Workers are a serverless execution environment that allows you to create entirely new applications or augment existing ones without configuring or maintaining infrastructure.

Source for this guide: Matrix on Cloudflare

Step-by-Step Guide

Follow these steps to configure Matrix using Cloudflare Workers:

1. Log in to your Cloudflare account.

Navigate to the account and domain where you want to create the worker.

1. Navigate to the Workers tab.

This is located on the top menu. Clicking it will bring you to the Workers’ dashboard.

1. Click on the “Create a Worker” button.

This will open a new page with a script template for your worker.

1. Replace the default script with your script.

In the editor, delete the existing script and paste the following script. Replace:

• `"https://matrix.example.com"` with your actual homeserver URL.
• `"https://vector.im"` with your identity server URL.
• `"matrix-fed.example.com:8443"` with your federation server.

const HOMESERVER_URL = "https://matrix.example.com";
const IDENTITY_SERVER_URL = "https://vector.im";
const FEDERATION_SERVER = "matrix-fed.example.com:8443";

export default {
  async fetch(request, env) {
    const path = new URL(request.url).pathname;
    switch (path) {
      case "/.well-known/matrix/client":
        return new Response(
          JSON.stringify({
            "m.homeserver": { "base_url": HOMESERVER_URL },
            "m.identity_server": { "base_url": IDENTITY_SERVER_URL }
          }),
          { headers: { "Content-Type": "application/json" } }
        );
      case "/.well-known/matrix/server":
        return new Response(
          JSON.stringify({ "m.server": FEDERATION_SERVER }),
          { headers: { "Content-Type": "application/json" } }
        );
      default:
        return new Response("Invalid request", { status: 404 });
    }
  },
};

1. Give your worker a name.

The name identifies your worker and is used in the worker’s URL.

1. Click “Save and Deploy”.

Your worker is now deployed and live. You can test it directly in the Workers dashboard by requesting your worker’s URL.

Setting Up Routes

Once your worker is deployed, set up routes to ensure requests to the following endpoints are handled by the worker:

• `/.well-known/matrix/client`
• `/.well-known/matrix/server`

You can configure these routes in your Cloudflare dashboard under the **Workers > Routes** section.