code: def send_http_error(self, http_code, cim_error=None,
                          cim_error_details=None, headers=None):
          
          self.send_response(http_code, http_client.responses.get(http_code, ''))
          self.send_header("CIMExport", "MethodResponse")
          if cim_error is not None:
              self.send_header("CIMError", cim_error)
          if cim_error_details is not None:
              self.send_header("CIMErrorDetails", cim_error_details)
          if headers is not None:
              for header, value in headers:
                  self.send_header(header, value)
          self.end_headers()
          self.log('%s: HTTP status %s; CIMError: %s, CIMErrorDetails: %s',
                   (self._get_log_prefix(), http_code, cim_error,
                    cim_error_details),
                   logging.WARNING)
docs: Send an HTTP response back to the WBEM server that indicates
          an error at the HTTP level.