Re: [fetch] Redirect on preflighted CORS requests generally impossible (#204)

I'm not sure what you mean by your last comment @nschloe.

As for the original report, as far as I can tell the standard already support CORS requests that require a preflight to follow redirects. Basically each request in the chain will be preceded by a CORS-preflight request to the same URL that expects a 2xx response. Then the actual CORS request will be made and for that the response code does not matter (i.e., 307 is okay), as long as it passes the CORS check.

So I guess what remains is someone filing bugs on browsers and hoping they implement these better semantics.

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