code: def _write_response(self, response):
          
          status = '{} {} {}\r\n'.format(response['version'],
                                         response['code'],
                                         responses[response['code']])
          self.logger.debug("Responding status: '%s'", status.strip())
          self._write_transport(status)
  
          if 'body' in response and 'Content-Length' not in response['headers']:
              response['headers']['Content-Length'] = len(response['body'])
  
          response['headers']['Date'] = datetime.utcnow().strftime(
              "%a, %d %b %Y %H:%M:%S +0000")
  
          for (header, content) in response['headers'].items():
              self.logger.debug("Sending header: '%s: %s'", header, content)
              self._write_transport('{}: {}\r\n'.format(header, content))
  
          self._write_transport('\r\n')
          if 'body' in response:
              self._write_transport(response['body'])
docs: Write the response back to the client
  
          Arguments:
          response -- the dictionary containing the response.