Django Middleware का परिचय

Middleware checkpoints की एक series जैसी है जिससे हर request अपने view तक और वापस जाते समय गुज़रती है।

In this page:

Middleware क्या है?
Request/Response Chain
Built-in Middleware जो आप पहले से उपयोग करते हैं
Middleware कहां रहता है

Syntax

markup

class MiddlewareName:
    def __init__(self, get_response):
        self.get_response = get_response

    def __call__(self, request):
        # code before the view
        response = self.get_response(request)
        # code after the view
        return response

Middleware क्या है?

Middleware एक class है जो Django के request handling और आपके view के बीच बैठती है, view execute होने से पहले और बाद में code चलाने में सक्षम।

उदाहरण: What Is Middleware?

Middleware is a class that sits between Django's request handling and your view, able to run code before and after the view executes.

markup

class SimpleLoggingMiddleware:
    def __init__(self, get_response):
        self.get_response = get_response

    def __call__(self, request):
        print(f"Request path: {request.path}")
        response = self.get_response(request)
        return response

{# Django-only code -- models.py/views.py/urls.py/settings.py snippets, or template markup using Django template tags/variables -- can't run standalone via Judge0 or the browser preview, since it needs a real Django project. Only this course's pure-Python examples (example_lang == 'python', no Django imports) are actually runnable, so those still get the button below. #}

Request/Response Chain

self.get_response(request) call करना next middleware (या view) को control hand करता है। उस call से पहले का code आते समय चलता है; बाद का code जाते समय चलता है।

उदाहरण: The Request/Response Chain

Calling self.get_response(request) hands control to the next middleware (or the view). Code before that call runs on the way in; code after runs on the way out.

markup

class TimingMiddleware:
    def __init__(self, get_response):
        self.get_response = get_response

    def __call__(self, request):
        print("Before view runs")
        response = self.get_response(request)
        print("After view runs")
        return response

Built-in Middleware जो आप पहले से उपयोग करते हैं

हर नया Django project security headers, sessions, और authentication के लिए middleware के साथ आता है जो settings.py में पहले से enabled है।

उदाहरण: Built-in Middleware You Already Use

Every new Django project ships with middleware for security headers, sessions, and authentication already enabled in settings.py.

markup

MIDDLEWARE = [
    "django.middleware.security.SecurityMiddleware",
    "django.contrib.sessions.middleware.SessionMiddleware",
    "django.contrib.auth.middleware.AuthenticationMiddleware",
]

Middleware कहां रहता है

Middleware settings.py में एक dotted Python path के रूप में register होता है, चाहे यह Django का अपना हो या आपने खुद लिखा हो।

उदाहरण: Where Middleware Lives

Middleware is registered in settings.py as a dotted Python path, whether it's one of Django's own or one you wrote yourself.

markup

MIDDLEWARE = [
    "django.middleware.security.SecurityMiddleware",
    "myapp.middleware.SimpleLoggingMiddleware",
]

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Django Middleware का परिचय

Middleware क्या है?

Request/Response Chain

Built-in Middleware जो आप पहले से उपयोग करते हैं

Middleware कहां रहता है

Chapter Quiz — Complete all 8 topics to unlock

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