cloudflare-cookie-filter

Cloudflare worker to forward requests to an Origin but filter out Cookies that do not match certain criteria.

Usage

The worker supports configuration via the following environment variables:

Name	Required?	Description	Example
ORIGIN	yes	The origin server to call	srv.example.org
COOKIE_PREFIX_FILTER	no	Prefix filter to remove Cookies not starting with this prefix	abc-

The worker forwards request methods, paths and query parameters as is, so you should map a complete subdomain to this worker and not use any path prefix (to ensure paths are forwarded correctly to the origin).

 +------------+
 |  Browser   |
 +------------+
      |
      | POST test.mysite.com/set?id=123
      |
      V
 +------------+
 |   Worker   |
 +------------+
      |
      | POST srv.example.org/set?id=123
      |
      V
 +------------+
 |   Origin   |
 +------------+

Local development

Learn more at https://developers.cloudflare.com/workers/

• Adjust the environment variables in wrangler.toml to your needs.
• Run npm run dev in your terminal to start a development server
• Open a browser tab at http://localhost:8787/ to see your worker in action

Deploy worker

• Adjust the environment variables in wrangler.toml to your needs.
• Run npm run deploy in your terminal
• Note: When pushing to your *.workers.dev subdomain for the first time, you may see errors while DNS is propagating. These errors should resolve themselves after a minute or so.
• Finalize your configuration at https://dash.cloudflare.com/ > "Workers & Pages" as needed.