How to resolve redirect 301 using Cloudflare worker

Question

When trying to fetch URL-A in Cloudflare like

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


async function handleRequest(request) {
  return fetch(request);
}

I'm getting the following response:

301 Moved Permanently location: URL-B

Can I resolve it in Cloudflare by making an additional fetch to URL-B instead of returning 301 response to the user?

Sounds possible, but didn't manage to find where I can get response's location attribute for URL-B.

How can I get the location of URL-B from URL-A's 301 response? (Already tried to console.log all knowns response attributes)

Answer 1

In the Worker, before sending the outbound request, you can specify that redirects should be followed.

Here's an example showing how to set that:

async function handleRequest(incomingRequest) {
    const outgoingRequest = new Request(
        incomingRequest.url,
        new Request(incomingRequest, {
            redirect: 'follow'
        })
    );

    return await fetch(outgoingRequest);
}