docs: def make_view(robot):
      """
      为一个 BaseRoBot 生成 Django view。
  
      :param robot: 一个 BaseRoBot 实例。
      :return: 一个标准的 Django view
      """
      assert isinstance(robot, BaseRoBot),\
          "RoBot should be an BaseRoBot instance."
  
      @csrf_exempt
      def werobot_view(request):
          timestamp = request.GET.get("timestamp", "")
          nonce = request.GET.get("nonce", "")
          signature = request.GET.get("signature", "")
          if not robot.check_signature(
              timestamp=timestamp,
              nonce=nonce,
              signature=signature
          ):
              return HttpResponseForbidden()
          if request.method == "GET":
              return HttpResponse(request.GET.get("echostr", ""))
          elif request.method == "POST":
              body = request.body
              message = parse_user_msg(body)
              reply = robot.get_reply(message)
              return HttpResponse(
                  create_reply(reply, message=message),
                  content_type="application/xml;charset=utf-8"
              )
          return HttpResponseNotAllowed(['GET', 'POST'])
  
      return werobot_view