Cloudflare workers script to enable CORS for fonts

cloudflare-worker-cors-fonts.js

// Sets Access-Control-Allow-Origin for fonts
// this worker should be used in subdomain from where fonts are being loaded but not in main site
// eg. www.example.com & static.example.com
// use this worker script with static.example.com

let corsHeaders = {
  "Access-Control-Allow-Origin" : "https://sangams.com.np",
}

addEventListener('fetch', event => {
	event.respondWith(addHeaders(event.request))
})

async function addHeaders(req) {
	let response = await fetch(req)
	let newHdrs = new Headers(response.headers)

   if (newHdrs.has("Content-Type") && !(newHdrs.get("Content-Type").includes("font")) ) {
        return new Response(response.body , {
            status: response.status,
            statusText: response.statusText,
            headers: newHdrs
        })
	}

	Object.keys(corsHeaders).map(function(name, index) {
		newHdrs.append(name, corsHeaders[name]);
	})

	return new Response(response.body , {
		status: response.status,
		statusText: response.statusText,
		headers: newHdrs
	})
}