Build a Leaderboard API At Edge using Cloudflare Workers and Redis
With edge functions, it is possible to run your backend at the closest location to your users. Cloudflare Workers and Fastly Compute@Edge runs your function at the closest location to your user using their CDN infrastructure.
In this article we will implement a very common web use case at Edge. We will implement a leaderboard API without any backend servers, containers or even serverless functions. We will just use edge functions. Leaderboard will have the following APIs:
In this tutorial, we will use Cloudflare Workers and Upstash. You can create a free database from Upstash Console. Then create a Workers project using Wrangler.
We route the request to two methods: if it is a GET, we return the leaderboard. If it is a POST, we read the query parameters and add a new score.
In the getLeaderboard() method, you will see we pass a cache configuration to the fetch() method. It caches the result of the request at the Edge for 10 seconds.
