docs: def make_view(robot):
      """
      为一个 BaseRoBot 生成 Flask view。
  
      Usage ::
  
          from werobot import WeRoBot
  
          robot = WeRoBot(token='token')
  
  
          @robot.handler
          def hello(message):
              return 'Hello World!'
  
          from flask import Flask
          from werobot.contrib.flask import make_view
  
          app = Flask(__name__)
          app.add_url_rule(rule='/robot/', # WeRoBot 的绑定地址
                          endpoint='werobot', # Flask 的 endpoint
                          view_func=make_view(robot),
                          methods=['GET', 'POST'])
  
      :param robot: 一个 BaseRoBot 实例
      :return: 一个标准的 Flask view
      """
  
      def werobot_view():
          timestamp = request.args.get('timestamp', '')
          nonce = request.args.get('nonce', '')
          signature = request.args.get('signature', '')
          if not robot.check_signature(
              timestamp,
              nonce,
              signature,
          ):
              return robot.make_error_page(html.escape(request.url)), 403
          if request.method == 'GET':
              return request.args['echostr']
  
          message = robot.parse_message(
              request.data,
              timestamp=timestamp,
              nonce=nonce,
              msg_signature=request.args.get('msg_signature', '')
          )
          response = make_response(robot.get_encrypted_reply(message))
          response.headers['content_type'] = 'application/xml'
          return response
  
      return werobot_view