docs: def Send(self,
             data,
             status=200,
             ctype="application/octet-stream",
             additional_headers=None,
             last_modified=0):
      """Sends a response to the client."""
      if additional_headers:
        additional_header_strings = [
            "%s: %s\r\n" % (name, val)
            for name, val in iteritems(additional_headers)
        ]
      else:
        additional_header_strings = []
  
      header = ""
      header += "HTTP/1.0 %s\r\n" % self.statustext[status]
      header += "Server: GRR Server\r\n"
      header += "Content-type: %s\r\n" % ctype
      header += "Content-Length: %d\r\n" % len(data)
      header += "Last-Modified: %s\r\n" % self.date_time_string(last_modified)
      header += "".join(additional_header_strings)
      header += "\r\n"
  
      self.wfile.write(header.encode("utf-8"))
      self.wfile.write(data)