}
}

func TestCloseOnWriter(t *testing.T) {
	writer := WriteOnClose(io.Discard)
	if writer.HasWritten() {
		t.Error("WriteOnCloser must not be marked as HasWritten")
	}
	writer.Write(nil)
	if !writer.HasWritten() {
		t.Error("WriteOnCloser must be marked as HasWritten")
	}

	writer = WriteOnClose(io.Discard)
	writer.Close()
	if !writer.HasWritten() {

	}
	return nil
}

// HasWritten returns true if at least one write operation was performed.
func (w *WriteOnCloser) HasWritten() bool { return w.hasWritten }

// WriteOnClose takes an io.Writer and returns an ioutil.WriteOnCloser.
func WriteOnClose(w io.Writer) *WriteOnCloser {
	return &WriteOnCloser{w, false}
}

type ioret[V any] struct {
	val V
	err error
}

		writeErrorResponse(ctx, w, toAPIError(ctx, err), r.URL)
		return
	}
	// s3zip does not allow ranges
	w.Header().Del(xhttp.AcceptRanges)

	setHeadGetRespHeaders(w, r.Form)

	httpWriter := xioutil.WriteOnClose(w)

	// Write object content to response body
	if _, err = xioutil.Copy(httpWriter, rc); err != nil {
		if !httpWriter.HasWritten() {

		setPartsCountHeaders(w, objInfo)
	}

	setHeadGetRespHeaders(w, r.Form)

	var iw io.Writer = w

	statusCodeWritten := false
	httpWriter := xioutil.WriteOnClose(iw)
	if rs != nil || opts.PartNumber > 0 {
		statusCodeWritten = true
		w.WriteHeader(http.StatusPartialContent)
	}

	// Write object content to response body