Cloudflare Workers script that processes icalendar URL and return back the result in ics format.
WhenIWork.com calendar contains my daily work schedules. I use this Worker to create a new serverless icalendar which only contains the days when I'm not working. I can then import the URL (or generated ics file) to my other calendar, so people who view the calendar knows I'm not working and won't send calendar invites on that day =)
Edit the index.js file, define the URL to read the icalendar from.
Edit the wrangler.toml file, add the account_id, zone_id and route to deploy the Workers script to, and the source calendar URL as the environment variable.
Deploy the worker to the route:
wrangler publish
Clone the repository and install dependencies in the node_module folder using npm.
npm i
Choose whether you want to read the locally saved icalendar file (e.g ./sample.ics) or to fetch the file from the remote URL and comment/uncomment out the related code blocks.
Run index-node.js with Node.js
node index-node.js > output.ics