Authentication in APIs ensures that only authorized users can access or modify data.<\/p>\n\n\n\n
In Django REST Framework (DRF), authentication verifies who the user is<\/strong>, and permissions decide what the user can do<\/strong>.<\/p>\n\n\n\n APIs commonly use token-based authentication instead of session-based authentication.<\/p>\n\n\n\n Authentication helps:<\/p>\n\n\n\n Protect sensitive data Django REST Framework supports multiple authentication methods:<\/p>\n\n\n\n Let\u2019s understand the most common ones.<\/p>\n\n\n\n This is used mainly for web applications.<\/p>\n\n\n\n It works with Django\u2019s login system.<\/p>\n\n\n\n In This works well for web browsers but is not ideal for mobile apps.<\/p>\n\n\n\n Token authentication is widely used for APIs and mobile applications.<\/p>\n\n\n\n Add to Run migration:<\/p>\n\n\n\n In You can also generate tokens automatically using signals.<\/p>\n\n\n\n Client sends request with header:<\/p>\n\n\n\n Authorization: Token your_token_here<\/p>\n\n\n\n Now the API will authenticate the user.<\/p>\n\n\n\n Example:<\/p>\n\n\n\n Only authenticated users can access this API.<\/p>\n\n\n\n JWT (JSON Web Token) is commonly used in modern applications.<\/p>\n\n\n\n It generates:<\/p>\n\n\n\n JWT is:<\/p>\n\n\n\n Popular package:<\/p>\n\n\n\n Install:<\/p>\n\n\n\n JWT is commonly used in mobile apps and React\/Angular frontends.<\/p>\n\n\n\n Authentication \u2192 Who are you? Example permission classes:<\/p>\n\n\n\n Use HTTPS Authentication in APIs ensures secure access to data.<\/p>\n\n\n\n Django REST Framework provides powerful tools like Token Authentication and JWT to secure APIs efficiently.<\/p>\n\n\n\n By combining authentication and permissions, you can build secure and professional backend systems.<\/p>\n\n\nWhy API Authentication is Important<\/h2>\n\n\n\n
Prevent unauthorized access
Secure user accounts
Control access to resources
Build professional and secure applications<\/p>\n\n\n\nTypes of Authentication in DRF<\/h2>\n\n\n\n
\n
1. Session Authentication<\/h2>\n\n\n\n
settings.py<\/code>:<\/p>\n\n\n\nREST_FRAMEWORK = {
'DEFAULT_AUTHENTICATION_CLASSES': [
'rest_framework.authentication.SessionAuthentication',
]
}<\/pre>\n\n\n\n2. Token Authentication (Most Common)<\/h2>\n\n\n\n
Step 1: Install Token Support<\/h3>\n\n\n\n
INSTALLED_APPS<\/code>:<\/p>\n\n\n\nINSTALLED_APPS = [
...
'rest_framework.authtoken',
]<\/pre>\n\n\n\npython manage.py migrate<\/pre>\n\n\n\n
Step 2: Configure Authentication<\/h3>\n\n\n\n
settings.py<\/code>:<\/p>\n\n\n\nREST_FRAMEWORK = {
'DEFAULT_AUTHENTICATION_CLASSES': [
'rest_framework.authentication.TokenAuthentication',
],
}<\/pre>\n\n\n\nStep 3: Generate Token for User<\/h3>\n\n\n\n
from rest_framework.authtoken.models import Token
from django.contrib.auth.models import Useruser = User.objects.get(username=\"ali\")
token = Token.objects.create(user=user)
print(token.key)<\/pre>\n\n\n\nStep 4: Use Token in API Request<\/h3>\n\n\n\n
Protecting API Views<\/h2>\n\n\n\n
from rest_framework.permissions import IsAuthenticated
from rest_framework.decorators import api_view, permission_classes
from rest_framework.response import Response@api_view(['GET'])
@permission_classes([IsAuthenticated])
def secure_api(request):
return Response({\"message\": \"You are authenticated\"})<\/pre>\n\n\n\n3. JWT Authentication<\/h2>\n\n\n\n
\n
\n
djangorestframework-simplejwt<\/code><\/p>\n\n\n\npip install djangorestframework-simplejwt<\/pre>\n\n\n\n
Authentication vs Permission<\/h2>\n\n\n\n
Permission \u2192 What are you allowed to do?<\/p>\n\n\n\n\n
Example: Admin-Only API<\/h2>\n\n\n\n
from rest_framework.permissions import IsAdminUser@api_view(['GET'])
@permission_classes([IsAdminUser])
def admin_only(request):
return Response({\"message\": \"Admin Access Only\"})<\/pre>\n\n\n\nBest Practices for API Authentication<\/h2>\n\n\n\n
Do not expose tokens publicly
Use JWT for scalable apps
Set token expiration
Use proper permission classes
Never store passwords in plain text<\/p>\n\n\n\nKey Takeaway<\/h2>\n\n\n\n