ASGI vs WSGI in Django

Introduction

ASGI and WSGI are ways for your web server to talk to your Django app. They help your app handle web requests.

When you want to build a simple website that handles one request at a time.

When you need your app to handle many users chatting or sending messages at the same time.

When your app uses real-time features like live notifications or chat.

When you want to support both normal web pages and WebSocket connections.

When you want to run your Django app on different servers that support these interfaces.

Syntax

Django

WSGI application example:
application = get_wsgi_application()

ASGI application example:
application = get_asgi_application()

WSGI stands for Web Server Gateway Interface and works synchronously.

ASGI stands for Asynchronous Server Gateway Interface and supports async features.

Examples

This sets up a WSGI app for handling normal HTTP requests synchronously.

Django

from django.core.wsgi import get_wsgi_application

application = get_wsgi_application()

This sets up an ASGI app that can handle HTTP and WebSocket requests asynchronously.

Django

from django.core.asgi import get_asgi_application

application = get_asgi_application()

Sample Program

This example shows how to set up an ASGI application in Django. It prepares your app to handle both normal web requests and real-time connections.

Django

from django.core.asgi import get_asgi_application

application = get_asgi_application()

# This ASGI app can handle normal HTTP requests and WebSocket connections.
# It allows your Django app to support real-time features like chat or notifications.

Important Notes

WSGI apps handle one request at a time per worker, which is simpler but less efficient for real-time features.

ASGI apps can handle many requests at once using async code, making them better for chat apps or live updates.

Use ASGI if you plan to use WebSockets or async features in your Django project.

Summary

WSGI is for synchronous, simple web apps.

ASGI supports asynchronous code and real-time features.

Choose ASGI for modern Django apps needing WebSocket or async support.