** 2/28 Fixed forgetting to upload files to the repository. .. .. ** **

Purpose

Create and use your own middleware with Django.

environment

Ubuntu 16.04
python 3.5.2
Django 1.10.5

What is Django middleware?

Pre-processing and request processing in the view Request and response are processed as post-processing of view.

Implementation

middlewares
|_ __init__.py
|_ sample_middleware.py

`sample_middleware.py`


class SampleMiddleware(object):
    """
Sample middleware,
Before the request is processed by view and
Just display the string on the screen before the response is returned to the client
    """
    def __init__(self, get_response):
        self.get_response = get_response

    def __call__(self, request):
        self.process_request(request) #Preprocessing
        response = self.get_response(request)　#View processing
        self.process_response(request, response) #Post-processing

        return response

    def process_request(self, request):
        print("Request processing")

    def process_response(self, request, response):
        print("Response processing")

The routing and view preparation are appropriate. Any pre-processing and post-processing methods can be added (Of course it doesn't have to be process_ ~~)

Setting method

`settings.Excerpt from py`


MIDDLEWARE = [
    'django.middleware.security.SecurityMiddleware',
    'django.contrib.sessions.middleware.SessionMiddleware',
    'django.middleware.common.CommonMiddleware',
    'django.middleware.csrf.CsrfViewMiddleware',
    'django.contrib.auth.middleware.AuthenticationMiddleware',
    'django.contrib.messages.middleware.MessageMiddleware',
    'django.middleware.clickjacking.XFrameOptionsMiddleware',
    'middleware_sample.middlewares.sample_middleware.SampleMiddleware',
]

motion

When you access http://127.0.0.1:8000/test/ with a browser, The following contents are displayed.

`Display of server-side terminal when accessing the browser`


Request processing
Processing view for Sample
Response processing
[27/Feb/2017 14:11:02] "GET /test/ HTTP/1.1" 200 22

reference

I have posted the sample code on GitHub https://github.com/Fufuhu/DjangoMiddlewareSample

Create your own Django middleware