Django Middleware – Complete

 What is Middleware?

Middleware is a special layer in Django that processes every request and response globally before or after the view is called.

It acts like a filter, gatekeeper or security guard in a web app.

🧠 Why is Middleware Important?

Task Done using Middleware
Block specific users ✅
Auto login redirect ✅
Theme (dark/light) toggle ✅
Add info to response/request ✅
Language / Location detection ✅

⚙️ How Middleware Works in Django

Browser → Middleware → View → Middleware → Response → Browser



pip install django-ipware




✅ Step 1: Create Middleware File

📁 Create middleware.py in your Django app (e.g., main/middleware.py)



from ipware import get_client_ip
from django.http import HttpResponse

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

    def __call__(self, request):
        ip, _ = get_client_ip(request)

        # Fake block: if IP starts with "172."
        if ip and ip.startswith("172."):
            return HttpResponse("❌ Access Blocked: Not allowed in your region.", status=403)

        # Otherwise continue
        response = self.get_response(request)
        return response




✅ Step 2: Add Middleware in settings.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',
    'main.middleware.BlockForeignMiddleware',
]



✅ Step 3: Create a Test View


📄 views.py

from django.shortcuts import render

# Create your views here.



from django.http import HttpResponse

def homepage(request):
    return HttpResponse("✅ Welcome! You are allowed to access this site.")



✅ Step 4: Add URL

📄 urls.py


from django.contrib import admin
from django.urls import path
from main.views import homepage

urlpatterns = [
    path('', homepage),
    path('admin/', admin.site.urls),
]

✅ Step 5: Run the Server


python manage.py runserver


Comments

Post a Comment

Popular posts from this blog

Mastering Django: Project and App Folder Structure

Mastering Django: Project and App Folder Structure 1. Django Project Folder Structure When you create a Django project, it follows a structured format, ensuring an organized development environment. projectname/ │── manage.py # Command-line utility to manage the project │── db.sqlite3 # Default SQLite database file (if used) │── projectname/ # Main project directory containing settings │ │── __init__.py # Marks this directory as a Python package │ │── settings.py # Project-wide configuration settings │ │── urls.py # Main URL routing for the project │ │── asgi.py # Entry point for ASGI-compatible web servers (optional) │ │── wsgi.py # Entry point for WSGI-compatible web servers │── appname/ # A Django app directory (e.g., blog, users, etc.) │ │── __init__.py # Marks this directory as a Python package │ │── admin.py # Configuration for Django admin panel │ │── apps.py # Application configuration │...
Read more

Mastering Django Template Language (DTL): A Step-by-Step Guide

  Mastering Django Template Language (DTL): A Step-by-Step Guide Django's Template Language (DTL) is a powerful tool for rendering dynamic data on web pages using HTML templates . This guide will cover how to pass data from views to templates , display variables, use conditional statements, apply loops, and implement filters with practical examples. ✅ 1. Passing Data from Views to Templates 🧠 How to Pass Data: Data is passed using the context dictionary in the render() function. # views.py from django.shortcuts import render # Simple Template Rendering def home(request): return render(request, 'myapp/home.html') # Dynamic Data Rendering def user_info(request): context = { 'name': 'John Doe', 'age': 25, 'fruits': ['Apple', 'Banana', 'Cherry'], 'is_logged_in': True, 'score': 85, 'hobbies': ['Reading', 'Gaming', ...
Read more

How to Add Templates in Django: Step-by-Step Guide

  How to Add Templates in Django: Step-by-Step Guide Django's Template System allows developers to create web pages by using HTML templates. Adding templates to a Django project involves setting up the template directory , configuring settings.py , and rendering templates through views. This guide will focus solely on how to add templates without involving dynamic data. ✅ 1. Setting Up Your Django Project # Step 1: Create a new Django project and app django-admin startproject myproject cd myproject python manage.py startapp myapp 📂 Project Directory Structure: myproject/ ├── myapp/ │ ├── templates/ │ │ └── myapp/ │ │ ├── home.html │ └── views.py ├── manage.py └── settings.py myapp/templates/myapp/ : This is where all app-specific templates will reside. Keeping templates within the app directory is a best practice to avoid conflicts when multiple apps are used. ✅ 2. Configuring Templates in settings.py TEMPLATES = [ { 'BACKEND...
Read more