Cloudflare Worker

Cloud Auth is fully compatible with Cloudflare Workers and can verify requests like this:

import { createVerifier } from '@featherscloud/auth'

const appId = '<your-app-id>'
const verifier = createVerifier({ appId })

const headers = {
  'Content-Type': 'application/json',
  'Access-Control-Allow-Headers': '*',
  'Access-Control-Allow-Methods': 'GET',
  'Access-Control-Allow-Origin': '*',
}
export default {
  async fetch(request, _env, _ctx): Promise<Response> {
    // Handle CORS preflight request
    if (request.method === 'OPTIONS') {
      return new Response(null, {
        status: 200,
        headers,
      })
    }

    try {
      const header = request.headers.get('Authorization')

      if (!header) {
        throw new Error('Invalid Authorization header')
      }

      // Verify the Authorization header and get the user information
      const { user } = await verifier.verifyHeader(header)

      if (!user) {
        throw new Error('Cloud auth user not found')
      }

      const body = {
        message: `Hello ${user.email} from Cloudflare Worker!`,
      }

      return Response.json(body, {
        status: 200,
        headers,
      })
    }
    catch (error) {
      return Response.json({ error: (error as any).message }, {
        status: 400,
        headers,
      })
    }
  },
} satisfies ExportedHandler<Env>

The full Cloudflare Worker example can be found here.