code: def do_GET(self):
          # check here request header to identify the type of req, if http or ws
          # if this is a ws req, instance a ws handler, add it to App's ws list, return
          if "Upgrade" in self.headers:
              if self.headers['Upgrade'] == 'websocket':
                  #passing arguments to websocket handler, otherwise it will lost the last message, 
                  # and will be unable to handshake
                  ws = WebSocketsHandler(self.headers, self.request, self.client_address, self.server)
                  return
  
          
          do_process = False
          if self.server.auth is None:
              do_process = True
          else:
              if not ('Authorization' in self.headers) or self.headers['Authorization'] is None:
                  self._log.info("Authenticating")
                  self.do_AUTHHEAD()
                  self.wfile.write(encode_text('no auth header received'))
              elif self.headers['Authorization'] == 'Basic ' + self.server.auth.decode():
                  do_process = True
              else:
                  self.do_AUTHHEAD()
                  self.wfile.write(encode_text(self.headers['Authorization']))
                  self.wfile.write(encode_text('not authenticated'))
  
          if do_process:
              path = str(unquote(self.path))
              # noinspection PyBroadException
              try:
                  self._instance()
                  # build the page (call main()) in user code, if not built yet
                  with self.update_lock:
                      # build the root page once if necessary
                      if not 'root' in self.page.children['body'].children.keys():
                          self._log.info('built UI (path=%s)' % path)
                          self.set_root_widget(self.main(*self.server.userdata))
                  self._process_all(path)
              except:
                  self._log.error('error processing GET request', exc_info=True)
docs: Handler for the GET requests.