Support module-based scripts that don't provide FetchEvent

[Everlag]

Module-based scripts don't receive a FetchEvent, rather they get a request and other assorted info.

https://developers.cloudflare.com/workers/cli-wrangler/configuration#modules

That makes it harder to use with 8track. So far we've been working with

      const e = ({
        request,
      } as any) as FetchEvent

but that's not great as it steps around type safety.

It'd be great if there was something like getResponseForEvent that took the request only.

[ddowl]

The issue w/ Workers using Durable Objects is that you can't use service-worker syntax with them. In order to export a Durable Object from your worker, you must use JS modules instead.

https://developer.mozilla.org/en-US/docs/Web/API/Service_Worker_API
https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Modules

Turns out that the interface to these "targets" are slightly different, where the service-worker wants to create a fetch event handler and accepts a FetchEvent https://developer.mozilla.org/en-US/docs/Web/API/FetchEvent, the modules syntax must export a fetch handler which CF Workers will send a different set of arguments, which are roughly unspecified https://developers.cloudflare.com/workers/learning/using-durable-objects#instantiating-and-communicating-with-a-durable-object.