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Browserless CORS Proxy (Cloudflare Worker)

This Cloudflare Worker acts as a proxy for Browserless.io API calls, adding the necessary CORS headers to allow browser-side requests.

Why is this needed?

Browserless.io's API doesn't include CORS headers, so it can't be called directly from a browser. This worker proxies the request and adds the appropriate headers.

Deployment Steps

  1. Create a Cloudflare account (if you don't have one)

  2. Create a new Worker

    • Click "Create a Worker"
    • Replace the default code with the contents of worker.js
    • Click "Save and Deploy"

  3. Copy your Worker URL

    • It will look like: https://battlecard-proxy.your-subdomain.workers.dev

  4. Add to your .env.local

    VITE_BROWSERLESS_PROXY_URL=https://battlecard-proxy.your-subdomain.workers.dev

  5. Restart the dev server

    npm run dev

Free Tier Limits

Cloudflare Workers free tier includes:

  • 100,000 requests/day
  • 10ms CPU time per request

This is more than enough for Intel Deck usage.

Security Note

The worker expects the Browserless token to be passed in the request body (not stored in the worker), so your token stays in your local environment.