Django - 自定义装饰器只允许ajax请求

I have few views in my project which are called only by ajax and I need to put in a check that the views are processed only if the request is ajax. So I thought of writing a decorator. Upon searching for similar type of decorators I hit upon few but couldn't understand anything. I make use of class based views and will use this decorator on get/post methods. I did find few snippets but all were written for function based views which made it more difficult for me to understand as I have never worked upon function based views.I have few views in my project which are called