terraform-playground/cf-worker/script.js

// https://developers.cloudflare.com/r2/api/workers/workers-api-usage/#4-access-your-r2-bucket-from-your-worker
export default {
    async fetch(request, env) {
        const url = new URL(request.url);
        const key = url.pathname.slice(1);

        switch (request.method) {
            case 'PUT':
                await env.R2.put(key, request.body);
                return new Response(`Put ${key} successfully!`);
            case 'GET':
                const object = await env.R2.get(key);

                if (object === null) {
                    return new Response('Object Not Found', { status: 404 });
                }

                const headers = new Headers();
                object.writeHttpMetadata(headers);
                headers.set('etag', object.httpEtag);

                return new Response(object.body, {
                    headers,
                });
            case 'DELETE':
                await env.R2.delete(key);
                return new Response('Deleted!');

            default:
                return new Response('Method Not Allowed', {
                    status: 405,
                    headers: {
                        Allow: 'PUT, GET, DELETE',
                    },
                });
        }
    },
};