writeErrorResponseHeadersOnly(w, toAPIError(ctx, err))
		return
	}
	opts.WantChecksum = checksum

	fanOutOpts := fanOutOptions{Checksum: checksum}
	if crypto.Requested(formValues) {
		if crypto.SSECopy.IsRequested(r.Header) {
			writeErrorResponse(ctx, w, toAPIError(ctx, errInvalidEncryptionParameters), r.URL)
			return
		}

		if crypto.SSEC.IsRequested(r.Header) && crypto.S3.IsRequested(r.Header) {