code: def write(self, data):
          
          if self.stream.closed():
              return False
  
          if isinstance(data, self.app.box_class):
              # 打包
              data = data.pack()
          elif isinstance(data, dict):
              data = self.app.box_class(data).pack()
  
          self.app.events.before_response(self, data)
          for bp in self.app.blueprints:
              bp.events.before_app_response(self, data)
  
          ret = self.stream.write(data)
  
          for bp in self.app.blueprints:
              bp.events.after_app_response(self, data, ret)
          self.app.events.after_response(self, data, ret)
  
          return ret
docs: 发送数据    True: 成功   else: 失败