Django DRF with oAuth2 using DOT (django-oauth-toolkit)

Question

I am trying to make DRF work with oAuth2 (django-oauth-toolkit).

I was focusing on http://httplambda.com/a-rest-api-with-django-and-oauthw-authentication/

First I followed that instruction, but later, after getting authentication errors, I setup this demo: https://github.com/felix-d/Django-Oauth-Toolkit-Python-Social-Auth-Integration

Result was the same: I couldn't generate access token using this curl:

curl -X POST -d "grant_type=password&username=<user_name>&password=<password>" -u "<client_id>:<client_secret>" http://127.0.0.1:8000/o/token/

I got this error:

{"error": "unsupported_grant_type"}

The oAuth2 application was set with grant_type password. I changed grant_type to "client credentials" and tried this curl:

curl -X POST -d "grant_type=client_credentials" -u "<client_id>:<client_secret>" http://127.0.0.1:8000/o/token/

This worked and I got generated auth token.

After that I tried to get a list of all beers:

curl -H "Authorization: Bearer <auth_token>" http://127.0.0.1:8000/beers/

And I got this response:

{"detail":"You do not have permission to perform this action."}

This is the content of views.py that should show the beers:

from beers.models import Beer
from beers.serializer import BeerSerializer
from rest_framework import generics, permissions

class BeerList(generics.ListCreateAPIView):
    serializer_class = BeerSerializer
    permission_classes = (permissions.IsAuthenticated,)

    def get_queryset(self):
        user = self.request.user
        return Beer.objects.filter(owner=user)

    def perform_create(self, serializer):
        serializer.save(owner=self.request.user)

I am not sure what can be the problem here. First with "unsuported grant type" and later with other curl call. This also happen to me when I did basic tutorial from django-oauth-toolkit. I am using Django 1.8.2 and python3.4

Thanks for all help!

My settings.py looks like this

import os
BASE_DIR = os.path.dirname(os.path.dirname(__file__))

SECRET_KEY = 'hd#x!ysy@y+^*%i+klb)o0by!bh&7nu3uhg+5r0m=$3x$a!j@9'

DEBUG = True

TEMPLATE_DEBUG = True

ALLOWED_HOSTS = []

TEMPLATE_CONTEXT_PROCESSORS = (
    'django.contrib.auth.context_processors.auth',
)

INSTALLED_APPS = (
    'django.contrib.admin',
    'django.contrib.auth',
    'django.contrib.contenttypes',
    'django.contrib.sessions',
    'django.contrib.messages',
    'django.contrib.staticfiles',

    'oauth2_provider',
    'rest_framework',
    'beers',
)

MIDDLEWARE_CLASSES = (
    'django.contrib.sessions.middleware.SessionMiddleware',
    'django.middleware.common.CommonMiddleware',
    'django.middleware.csrf.CsrfViewMiddleware',
    'django.contrib.auth.middleware.AuthenticationMiddleware',
    'django.contrib.auth.middleware.SessionAuthenticationMiddleware',
    'django.contrib.messages.middleware.MessageMiddleware',
    'django.middleware.clickjacking.XFrameOptionsMiddleware',
)

AUTHENTICATION_BACKENDS = (
    'django.contrib.auth.backends.ModelBackend',
)
ROOT_URLCONF = 'beerstash.urls'

WSGI_APPLICATION = 'beerstash.wsgi.application'

DATABASES = {
    'default': {
        'ENGINE': 'django.db.backends.sqlite3',
        'NAME': os.path.join(BASE_DIR, 'db.sqlite3'),
    }
}

LANGUAGE_CODE = 'en-us'

TIME_ZONE = 'UTC'

USE_I18N = True

USE_L10N = True

USE_TZ = True

STATIC_URL = '/static/'

REST_FRAMEWORK = {
    'DEFAULT_AUTHENTICATION_CLASSES': (
        'oauth2_provider.ext.rest_framework.OAuth2Authentication',
    )
}

OAUTH2_PROVIDER = {
    # this is the list of available scopes
    'SCOPES': {'read': 'Read scope', 'write': 'Write scope'}
}

what does your settings look like? have you added all the settings for oauth to be used as REST Framework API authentication? — Alex T
newer version uses : from oauth2_provider.contrib.rest_framework import OAuth2Authentication — jmunsch

Yevgeniy Shchemelev Yevgeniy Shchemelev · Accepted Answer · 2015-06-20T14:08:42

I have tried the demo you mentioned and everything was fine.

$ curl -X POST -d "grant_type=password&username=superuser&assword=123qwe" -u"xLJuHBcdgJHNuahvER9pgqSf6vcrlbkhCr75hTCZ:nv9gzOj0BMf2cdxoxsnYZuRYTK5QwpKWiZc7USuJpm11DNtSE9X6Ob9KaVTKaQqeyQZh4KF3oZS4IJ7o9n4amzfqKJnoL7a2tYQiWgtYPSQpY6VKFjEazcqSacqTx9z8" http://127.0.0.1:8000/o/token/
{"access_token": "jlLpKwzReB6maEnjuJrk2HxE4RHbiA", "token_type": "Bearer", "expires_in": 36000, "refresh_token": "DsDWz1LiSZ3bd7NVuLIp7Dkj6pbse1", "scope": "read write groups"}
$ curl -H "Authorization: Bearer jlLpKwzReB6maEnjuJrk2HxE4RHbiA" http://127.0.0.1:8000/beers/
[]

In your case, I think, you have created an application with wrong "Authorization grant type".

Use this application settings:

Name: just a name of your choice
Client Type: confidential
Authorization Grant Type: Resource owner password-based

This https://django-oauth-toolkit.readthedocs.org/en/latest/rest-framework/getting_started.html#step-3-register-an-application helped me a lot.

Here the database file I've created: https://www.dropbox.com/s/pxeyphkiy141i1l/db.sqlite3.tar.gz?dl=0

You can try it yourself. No source code changed at all. Django admin username - superuser, password - 123qwe.

Django DRF with oAuth2 using DOT (django-oauth-toolkit)

2 Answers