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Using IBM Cloud Edge Functions (Cloudflare Workers) to add support for Index and Error documents for Cloud Object Storage static hosting.
const INDEX_DOCUMENT = 'index.html'
const ERROR_DOCUMENT = '404.html'
addEventListener('fetch', event => {
* @param {Request} request
async function handleRequest(request) {
const url = new URL(request.url)
if (url.pathname.endsWith('/')) {
url.pathname = `${url.pathname}${INDEX_DOCUMENT}`
request = new Request(url, request)
let response = await fetch(request)
if (response.status === 404) {
url.pathname = ERROR_DOCUMENT
request = new Request(url, request)
response = await fetch(request)
response = new Response(response.body, {
status: 404,
statusText: 'Not Found',
headers: response.headers
return response
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