django-rest-framework-condition

This package allows you to use @condition decorator from Django on ViewSet or APIView from Django Rest Framework. In other words, you can use HTTP headers ETag and Last-modified with your APIs.

It doesn't create a custom implementation of etags or last-modified header but uses ones from Django which means you can be sure it will be updated by Django's authors.

Similarly, as in Django, you can use shortcut decorators @last_modified and @etag.

Tested with:

• Python: 3.7, 3.8, 3.9
• Django: 2.2, 3.1, 3.2
• Django Rest Framework: 3.11, 3.12

Installation

pip install django-rest-framework-condition

Usage

Use decorators same way as with Django views.

Last-modified example

from datetime import datetime

from rest_framework.response import Response
from rest_framework.views import APIView
from rest_framework_condition import last_modified


class LastModifiedApiView(APIView):
    @last_modified(lambda _: datetime(2019, 1, 1))
    def get(self, request):
        return Response({'data': 'I have Last-Modified header!'})

ETag example

import hashlib

from rest_framework.response import Response
from rest_framework.views import APIView
from rest_framework_condition import etag


def my_etag(request, *args, **kwargs):
    return hashlib.md5(':'.join(request.GET.dict().values()).encode('utf-8')).hexdigest()


class EtagApiView(APIView):
    @etag(my_etag)
    def get(self, request):
        return Response({'data': 'I have Etag!'})

Both ETag and Last-Modified example

import hashlib
from datetime import datetime

from rest_framework.response import Response
from rest_framework.views import APIView
from rest_framework_condition import condition


def my_etag(request, *args, **kwargs):
    return hashlib.md5(':'.join(request.GET.dict().values()).encode('utf-8')).hexdigest()


def my_last_modified(request, *args, **kwargs):
    return datetime(2019, 1, 1)


class ConditionApiView(APIView):
    @condition(etag_func=my_etag, last_modified_func=my_last_modified)
    def get(self, request):
        return Response({'data': 'I have both Last-Modified and Etag!'})