Python Social auth authentication via access-token fails - django

I am currently developing a serverbackand with Django (1.7) that should handle authentication via social Networks by using python-social-auth.
I followed the Tutorial on this site, which describes the process for a simple Webapp.
This worked perfectly for Google and Twitter login.
Since the Server should be just a REST-FULL Backend I decided to get the Access-Token on the client side and send it to the server.
The server than will authenticate with it. This process should be no problem and is even given as an example in the docs of python-social-auth.
However if I do set everything up I will receive an error that says: "Backend not Found 404".
Here a minimal part of the project:
settings.py: (I also included API_KEY and SECRET)
AUTHENTICATION_BACKENDS = (
#'social.backends.facebook.FacebookOAuth2',
'social.backends.google.GoogleOAuth2',
'social.backends.twitter.TwitterOAuth',
'django.contrib.auth.backends.ModelBackend',
)
views.py (for the authentication view)
from django.contrib.auth import login
from social.apps.django_app.utils import psa
#psa('social:complete')
def register_by_access_token(request, backend):
token = request.GET.get('access_token')
user = request.backend.do_auth(request.GET.get('access_token'))
if user:
login(request, user)
return 'OK'
else:
return 'ERROR'
This i copied strait from the docs and only changed backend.do_auth to request.backend.do_auth. This seems to be an error in the docs.
urls.py:
...
url(r'^register-by-token/(?P<backend>[^/]+)/$', 'register_by_access_token')
...
Also as suggested in the docs.
I just tried to get this working just for google-oauth because there is a simple js-lib that gives you the access-token.
This also worked quite nice and I send a request to
GET http://localhost:8000/register-by-token/google-oauth2/<access-token>/
As described above the return was a 404 Backend not found.
I did a little bit of debugging and found out that the error is raised in the login function not the do_auth() function of the backend.
Therefor the actual authentication process works. I also tried using a random generated string as a token and got an according error, that the user cannot be authenticated.
The funny thing is that the user even has a property backend which holds 'social.backends.google.GoogleOAuth2' as it should.
Thank you if you stayed with me for the long post, and I hope someone has an idea what could be wrong :).
Looking forward to your answers.

In you register_by_access_token view, you are getting access_token in GET params
user = request.backend.do_auth(request.GET.get('access_token'))
and url you defiend is:
url(r'^register-by-token/(?P<backend>[^/]+)/$', 'register_by_access_token')
So you need to request something like:
GET http://localhost:8000/register-by-token/google-oauth2/?access_token=<access_token>
whereas, you are doing:
GET http://localhost:8000/register-by-token/google-oauth2/<access-token>/
You are passing access_token in url params, which is wrong.

Related

How to use dj-rest-auth with many clients

I'd like to have many different clients be able to access my django website (more specifically its API) but I'm not sure how to do this with django-allauth, dj-rest-auth and simplejwt.
My current client app is using the built in django template engine and is set up with django-allauth for social authentication (Google etc). It's working using the documented installation recommendations.
I would now like to create different types of clients that aren't using the django template engine (e.g. Angular, Vue, flutter mobile etc) but I'm confused how dj-rest-auth is used so that it scales to support any number of client types.
Using Google social sign in as an example, when I create a new client, I have to register a new redirect_uri specific to that client.
To test this all out, I created a simple flask app with a single link so that I can retrieve a "code/access_token" before sending it to my Django app. The link is created using the following...
var codeRequestUrl =
`https://accounts.google.com/o/oauth2/v2/auth?\
scope=email&\
access_type=offline&\
include_granted_scopes=true&\
response_type=code&\
state=state_parameter_passthrough_value&\
redirect_uri=http%3A//127.0.0.1:5000/callback&\
client_id=${clientId}`;
...and the code is retrieved at the '/callback' endpoint in flask...
#app.route("/callback", methods=['GET'])
def redirect():
code = request.args.get('code', '')
req = requests.post('http://127.0.0.1:8000/api/dj-rest-auth/google/', data={'code':code})
return "done..."
...from where I send an x-www-form-urlencoded POST request back to a dj-rest-auth endpoint that is set up as per its documentation...
class GoogleLogin(SocialLoginView):
callback_url = 'http://127.0.0.1:5000/callback'
adapter_class = GoogleOAuth2Adapter
client_class = OAuth2Client
...
urlpatterns += [
...
path('dj-rest-auth/google/', GoogleLogin.as_view(), name='google_login'),
....
]
Django then successfully returns an access_token, refresh_token and some info about the logged in user.
But this isn't something that scales well. If I were to also create an Angular client, I'd need to register a different callback (because the Angular client would be running on a different port and/or address, and I'd also need another path set up in urls.py and associate it with a new SocialLoginView subclass that can handle the different callback_url (redirect_uri).
And with all this in mind, I have no idea how to do all of this with a flutter mobile app, which as far as I'm aware, has no concept of a callback_url, so I'm not sure how making a POST request to .../dj-rest-auth/google/ would even work given that I'd instantly get a redirect_uri_mismatch error.
Have I got it backwards and the client registered at Google is the Angular, Vue, Flash etc app? That would mean that each client would have to handle its own client_id and client_secret, which then seems to bypass django-allauth's and dj-rest-auth's functionality.
I feel like I'm misinterpreting this, so I would really appreciate some suggestions.
I feel confident enough to answer my own question.
In short, yes, multiple clients (including thirdparty) is a reasonably straight forward process. Unfortunately a lot of the blog posts and tutorials that exist take the perspective of a 'second party' client, which really confuses things. The result is a lot of error messages relating to the redirect_uri.
To their credit, the Google docs for their example Flask app was exactly what I needed, but there are a couple of observations that are really important, and what caused so much confusion for me.
First, and most important, the callback (redirect_uri) is not needed in Django at all. In Django, something like this is all that is required.
from allauth.socialaccount.providers.oauth2.client import OAuth2Client
from allauth.socialaccount.providers.google.views import GoogleOAuth2Adapter
class GoogleLogin(SocialLoginView):
adapter_class = GoogleOAuth2Adapter
client_class = OAuth2Client
urlpatterns += [
...
path('auth/google/', GoogleLogin.as_view(), name='google_login'),
...
]
So no callback attribute is required. The reason for this is that the Flask (or thirdparty app) handles all of the Google side authentication.
The second observation was that the redirect_uri in the Flask app seemed have have to be the same for both the "code" request step, and the "access_token" step.
You can see it in the linked example where the oauth2callback function (which handles the redirect_uri), but I've modified for use with dj-rest-auth
#app.route('/')
def index():
if 'credentials' not in flask.session:
return flask.redirect(flask.url_for('oauth2callback'))
credentials = json.loads(flask.session['credentials'])
if credentials['expires_in'] <= 0:
return flask.redirect(flask.url_for('oauth2callback'))
else:
data = {'access_token': credentials['access_token']}
headers = headers = {'Content-Type': 'application/x-www-form-urlencoded'}
r = requests.post(f'{URL_ROOT}/api/auth/google/', data=data, headers=headers)
response_json = json.loads(r.text)
access_token = response_json['access_token'] # JWT Access Token
refresh_token = response_json['refresh_token']
# Make a query to your Django website
headers = headers = {'Authorization': f'Bearer {access_token}'}
r = requests.post(f'{URL_ROOT}/api/object/{OBJECT_ID}/action/', data=data, headers=headers)
# do stuff with r
#app.route('/oauth2callback')
def oauth2callback():
if 'code' not in flask.request.args:
auth_uri = ('https://accounts.google.com/o/oauth2/v2/auth?response_type=code'
'&client_id={}&redirect_uri={}&scope={}').format(CLIENT_ID, REDIRECT_URI, SCOPE)
return flask.redirect(auth_uri)
else:
auth_code = flask.request.args.get('code')
data = {'code': auth_code,
'client_id': CLIENT_ID,
'client_secret': CLIENT_SECRET,
'redirect_uri': REDIRECT_URI,
'grant_type': 'authorization_code'}
r = requests.post('https://oauth2.googleapis.com/token', data=data)
flask.session['credentials'] = r.text # This has the access_token
return flask.redirect(flask.url_for('index'))
So in summary, it's a bit like this:
On the index/home page, the user presses a "Login" html anchor that points to /login.
Flask doesnt have any credentials, so redirects to /oauth2callback to begin authentication.
First, the "code" is retrieved using Googles' GET /auth endpoint, and by using your app's client id.
The redirect_uri ensures the code flow goes back to itself, but this time, with the "code" now know, do a POST request to Google's /token endpoint using your apps's client id and client secret. Again, the redirect_uri is the same (/oauth2callback).
Now that Googles's access_token is known, the Flask app redirects back to /index (although it could be anywhere at this point)
Back in /index, the Flask app now has Google's "access_token". Use that to log into Django's dj-rest-auth endpoint that you created.
Django will then return its own access_token and refresh_token, so continue to use those as needed.
I hope this helps.
Note that your flask app will need to be registered as a new Web App with Google's OAuth2 console (so it has it's own client id and client secret). In other words, don't reuse what you may have already created with an existing Django allauth implementation (which was my scenario). Each thirdparty app maker will handle their own OAuth2 credentials.

How to implement admin login and logout using Django REST framework?

I have been given a task to authenticate admin login programmatically and logout as well.
I am able to to do login but on logged out when I check which user I am logging out it says AnonymousUser. How can I make sure I log out current user which is logged it.
I am using Django REST framework and testing it on Postman.
#api_view(["POST"])
def adminLogin(request):
if(request.method=="POST"):
username = request.data["username"]
password = request.data["password"]
authenticated_user = authenticate(request,username=username, password=password)
if authenticated_user != None:
if(authenticated_user.is_authenticated and authenticated_user.is_superuser):
login(request,authenticated_user)
return JsonResponse({"Message":"User is Authenticated. "})
else:
return JsonResponse({"message":"User is not authenticated. "})
else:
return JsonResponse({"Message":"Either User is not registered or password does not match"})
#api_view(["POST"])
def adminLogout(request):
print(request.user)
logout(request)
return JsonResponse({"message":"LoggedOut"})
Logging in/logging out with a REST API makes not much sense. The idea of logging in/logging out, at least how Django implements it, is by means of the session, so with a cookie that has the session id.
API clients like Postman usually do not work with cookies: each request is made more or less independent of the previous one. If you thus make the next request without a reference to the session, then the view will not link a user to that request. Clients like AJAX that runs on the browser of course can work with cookies, since these are embedded in the browser that manages cookies. You can work with cookies in postman as specified in this tutorial [learning postman], but this is usually not how an API is supposed to work.
This is why APIs usually work with a token, for example a JWT token. When authenticating, these are given a token that might be valid for a short amount of time, and subsequently it uses that token to make any other request that should be authorized.
As the Django REST framework documentation on TokenAuthentication [drf-doc] says, you can define views that create, and revoke tokens. The page also discusses session authentication that thus can be used for AJAX requests.
But likely you are thus using the wrong means to do proper authentication for your REST API, and you thus might want to work with a token like a JWT token instead.

Djoser password reset implementation

I am using djosers for my authentication on django backend which eventually i'll be connecting to flutter frontend and i am having trouble implementing the password reset functionality...
from what i have understood, first i need to hit the /users/reset_password/ with email body which will eventually give me the token of authentication which will be used further on confirm reset but the first thing i dont understand is PASSWORD_RESET_CONFIRM_URL field in the settings, like it needs a front end link with uid and token placeholders but what is this token field and what is this PASSWORD_RESET_CONFIRM_URL but i managed to look over a stack overflow question and filled it but now when i hit /users/reset_password/ i get this error:
[WinError 10013] An attempt was made to access a socket in a way forbidden by its access permissions
settings:
DJOSER = {
'PASSWORD_RESET_CONFIRM_URL':'reset/password/reset/confirm/{uid}/{token}',
'LOGIN_FIELD' : 'email',
'USER_CREATE_PASSWORD_RETYPE' : True,
'SERIALIZERS': {
'user_create': 'auth_app.serializers.UseriCreateSerializer',
'user': 'auth_app.serializers.UserCreateSerializer',
}
}
urls.py:
urlpatterns = [
path('',home,name='home'),
path('addInForum/',addInForum,name='addInForum'),
path('addInDiscussion/',addInDiscussion,name='addInDiscussion'),
path('<str:forum_id>/getDiscussion/',getDiscussion,name='getDiscussion'),
path('getDate/',getDate,name='getDate'),
path('reset/password/reset/confirm/<str:uid>/<str:token>/',PasswordResetView,name='PasswordResetView'),
# url(r'^reset/password/reset/confirm/(?P<uid>[\w-]+)/(?P<token>[\w-]+)/$', PasswordResetView.as_view(),),
]
views.py
#api_view(['GET'])
def PasswordResetView(request,uid,token):
post_data = {'uid': uid, 'token': token}
return Response(post_data)
Please remember that djoser should be part of your REST API based on Django REST Framework. You also need to think differently about the url routing in regard of your frontend app..
Usually urls in the form mydomain.com/some_url/whatever are considered "frontend urls" and parsed by routing of your frontend app. On the other hand urls in the form mydomain.com/api/something are considered API urls that are routed via Django's urls.py. I will refer to them as Fronted_URL and API_URL respectively.
So: resetting password works like this. The user that forgot their password and wants to reset it, surely needs to fill some king of form. This form needs to be sent to APIURL returned by resolve('user-reset-password') (by default this returns something like /users/reset_password/)
Here comes PASSWORD_RESET_CONFIRM_URL setting. Because after the body is accepted by the APIURL mentioned above, a mail will be sent to the user with a link that will point to URL entered in that setting. And it has to be FrontendURL! It should be routed by your frontend APP and preferably display some screen. But in the background your frontend app should send the values of uid and token fields to APIURL returned by resolve("user-reset-password-confirm").
This flow allows your frontend app to properly handle the response and display appropriate message to the user and then maybe redirect them to some other screen.
If you don't have a routed frontend app (probably written using REACT, ANGULAR or VUE) then you probably don't need a REST API and should just stick to django-allauth.

Get token from URL in Django. TDAmeritrade API Call

Ok,
I'm developing a website where I'm using Django. The website is for creating and keep track of stock portfolios. I have the database and the basics of the website set up but I would like to use the TDAmeritrade API in order to get the stock information. How it works is the user is redirected to TD where they enter there Login and Password they accept the terms and get transferred to a redirect page of the local host (until it goes live). Which looks a little like this
"https://127.0.0.1:8000/?code=" with a huge code after the equals sign.
Finally, how would one create the URL destination in Django url.py file and store the code for AUTH Token
I've tried something like this: path('?code=', test_view, name='test'),
but had no luck but that could be because of this error (You're accessing the development server over HTTPS, but it only supports HTTP.)
Thanks in advance!
Side note: I've tried looking up how Paypal does there send back confirmation but all I could find were packages Pre-build for Django
I figured out the solution with the help of Moha369 in the comments, So shout out to him/her!
def home_view(request):
context= {}
user = request.user
if user.is_authenticated:
token = request.GET.get('code')
print(token)
return render(request, "home.html", context)
Django Docs that helped

Facebook OAuth login for mobile app with python-social-auth

I'm currently writing a mobile application in Xamarin and Django with Python Social Auth, my application requires personalisation so I decided to use Facebook authentication instead of allowing users to store a username/password combination due to the security implications.
This works fine when using a normal web browser due to it remembering states, but the tricky part comes when trying to use Xamarin. I tried using Xamarin.Auth, but this caused an error due to the fact that it expected an access_token in the response [1], which I'm unable to get from the Python Social Auth library as it expects a hard-coded redirect after completion [2], which in turn causes a conflict between both libraries.
I tried looking at the following example code, but this expects the mobile app to ALREADY have an access token (taken from a similar question here):
from django.contrib.auth import login
from social.apps.django_app.utils import psa
# Define an URL entry to point to this view, call it passing the
# access_token parameter like ?access_token=<token>. The URL entry must
# contain the backend, like this:
#
# url(r'^register-by-token/(?P<backend>[^/]+)/$',
# 'register_by_access_token')
#psa('social:complete')
def register_by_access_token(request, backend):
# This view expects an access_token GET parameter, if it's needed,
# request.backend and request.strategy will be loaded with the current
# backend and strategy.
token = request.GET.get('access_token')
user = request.backend.do_auth(request.GET.get('access_token'))
if user:
login(request, user)
return 'OK'
else:
return 'ERROR'
If anyone has any experience with using Xamarin and Python Social Auth, it would be really appreciated if you could point me into the right direction with this.