Defer statement in Go

downloadutil.go

func downloadFile(downloadURL string, outFile *os.File) error {
	response, err := http.Get(downloadURL)
	if err != nil {
		return err
	}

	defer func() {
		if err := response.Body.Close(); err != nil {
			log.Warnf("Failed to close (%s) body", downloadURL)
		}
	}()

	if response.StatusCode != http.StatusOK {
		return fmt.Errorf("failed to download file from %s, error: %s", downloadURL, response.Status)
	}

	_, err = io.Copy(outFile, response.Body)
	if err != nil {
		return fmt.Errorf("failed to save file %s, error: %s", outFile.Name(), err)
	}

	return nil
}