Worker script to call direct_upload endpoint and get URL

get-direct-upload-url.js

addEventListener("fetch", event => {
  event.respondWith(handleRequest(event.request))
})

const url = "https://api.cloudflare.com/client/v4/accounts/:account_id/images/v1/direct_upload"

async function handleRequest(request) {
  const config = {
    method: 'POST',
    headers: {
      'Accept': 'application/json',
      'Content-Type': 'application/json',
      'Authorization': 'Bearer :token',
    },
  }
 
  const response = await fetch(url, config)
  const newResponse = new Response(response.body, response)
  newResponse.headers.append("Access-Control-Allow-Origin", "*")
  newResponse.headers.append("Access-Control-Allow-Headers", "*")
  return newResponse
}