my $handles = {
  400 => 1,  # BAD_INPUT
  403 => 31, # SERVICE_ACCESS_ERROR
  500 => 32, # SERVICE_EXECUTION_ERROR
  503 => 30, # SERVICE_ERROR
};
for ($response_code) {
    if ($_ == 200) {         # OK
        print_response $response_content;
        exit 0;
    };
    if (defined $handles->{$_}) {
      exit $handles->{$_};
    }
}