Writing your own middleware

Writing your own middleware is easy. Each middleware component is a single Python class that defines one or more of the following methods:

process_request

Method: process_request(request)

• request is an HttpRequest object.

• process_request() is called on each request, before Django decides which view to execute.

It should return either None or an HttpResponse object. If it returns None, Django will continue processing this request, executing any other process_request() middleware, then, process_view() middleware, and finally, the appropriate view.

If it returns an HttpResponse object, Django won't bother calling any other request, view or exception middleware, or the appropriate view; it'll apply response middleware to that HttpResponse, and return the result.

process_view

Method: process_view(request, view_func, view_args, view_kwargs)

• request is an HttpRequest object.

• view_func is the Python function that Django is about to use. (It's the actual function object, not...