Added Google OAuth Signup in the backend

README.md

@@ -86,7 +86,8 @@ Next follow these instructions.
    ```
    python manage.py migrate
    ```
-7. To run the server:
+7. To setup Social Auth for backend see [this](#Setup-Social-Auth).
+8. To run the server:
     ```
     python manage.py runserver
     ```
@@ -132,7 +133,23 @@ Add it to your .env file as follows:
 ```
 export SENDGRID_API_KEY=<your-sendgrid-api-key>
 ```
+3. `GOOGLE_CALLBACK_URL` - For using Google authentication the **Callback URL** is required by Google API. Add this env variable in `.env` file or export it to use **Callback URL** which you used while setting Up Google App. The default value is: `http://localhost:3000/login`.
 
+# Setup Social Auth
+
+1. Create a Super User by running this command: `python manage.py createsuperuser`.
+2. Login to [Django admin site](http://localhost:8000/admin/) using credentials of the previous step.
+3. Go to **Sites dashboard** in admin site. (**URL**: http://localhost:8000/admin/sites/site/).
+4. Click on `Add site` button and fill in the information as given in the image.
+
+   ![site_id](https://user-images.githubusercontent.com/56037184/109974910-0fa79b00-7d20-11eb-9826-44fdf6d770f9.png)
+
+   **Note**: After saving this if the site id is not `2` then change the `SITE_ID` in settings.py with the new site id.
+5. After this go to **Social Applications Dashboard**. (**URL**: http://localhost:8000/admin/socialaccount/socialapp/).
+6. Add the credentials that you get after creating the Google app. Fill in the information as given in the image.
+
+   ![social_add](https://user-images.githubusercontent.com/44670961/110095166-9f058a80-7dc2-11eb-85eb-afb109f46663.png)
+   **For creating Google App & Creating ClientId & Client Secret see [this docs](https://developers.google.com/adwords/api/docs/guides/authentication#create_a_client_id_and_client_secret).**
 ## Testing
 
 To run the tests run: `python manage.py test`.

main/settings.py

@@ -46,6 +46,13 @@
     "corsheaders",
     "osp",
     "token_auth",
+    # For Social Authentication
+    "dj_rest_auth",
+    "django.contrib.sites",
+    "allauth",
+    "allauth.account",
+    "allauth.socialaccount",
+    "allauth.socialaccount.providers.google",
 ]
 
 MIDDLEWARE = [
@@ -81,11 +88,16 @@
     "DEFAULT_PERMISSION_CLASSES": ["rest_framework.permissions.IsAuthenticated"],
     "DEFAULT_PARSER_CLASSES": ["rest_framework.parsers.JSONParser"],
     "DEFAULT_AUTHENTICATION_CLASSES": (
+        "dj_rest_auth.jwt_auth.JWTCookieAuthentication",
         "rest_framework.authentication.SessionAuthentication",
         "rest_framework_simplejwt.authentication.JWTAuthentication",
     ),
 }
 
+SITE_ID = 1
+
+REST_USE_JWT = True
+
 SIMPLE_JWT = {
     "ACCESS_TOKEN_LIFETIME": timedelta(days=2),
     "REFRESH_TOKEN_LIFETIME": timedelta(days=30),
@@ -158,3 +170,10 @@
 # https://docs.djangoproject.com/en/3.0/howto/static-files/
 
 STATIC_URL = "/static/"
+
+ACCOUNT_EMAIL_VERIFICATION = "none"
+
+if os.environ.get("GOOGLE_CALLBACK_URL"):
+    GOOGLE_CALLBACK_URL = os.getenv("GOOGLE_CALLBACK_URL")
+else:
+    GOOGLE_CALLBACK_URL = "http://localhost:3000/login"

requirements.txt

@@ -33,4 +33,6 @@ toml==0.10.1
 typed-ast==1.4.1
 urllib3==1.25.10
 wrapt==1.12.1
-zulip==0.7.0
+zulip==0.7.0
+django-allauth==0.44.0
+dj-rest-auth==2.1.3

token_auth/urls.py

@@ -1,7 +1,8 @@
 from django.conf.urls import url
-from django.urls import path
+from django.urls import include, path
 from rest_framework_simplejwt.views import TokenObtainPairView, TokenRefreshView
 
+from token_auth.views.google_oauth import GoogleLogin
 from token_auth.views.register import RegisterView
 
 urlpatterns = [
@@ -14,4 +15,7 @@
     # login URLs
     path("token/", TokenObtainPairView.as_view(), name="token_obtain_pair"),
     path("refresh/", TokenRefreshView.as_view(), name="token_refresh"),
+    # social-authentication
+    path("google/", GoogleLogin.as_view(), name="google_login"),
+    url(r"^accounts/", include("allauth.urls"), name="socialaccount_signup"),
 ]

token_auth/views/google_oauth.py

@@ -0,0 +1,11 @@
+from allauth.socialaccount.providers.google.views import GoogleOAuth2Adapter
+from allauth.socialaccount.providers.oauth2.client import OAuth2Client
+from dj_rest_auth.registration.views import SocialLoginView
+from django.conf import settings
+
+
+class GoogleLogin(SocialLoginView):
+    authentication_classes = []  # disable authentication
+    adapter_class = GoogleOAuth2Adapter
+    callback_url = settings.GOOGLE_CALLBACK_URL
+    client_class = OAuth2Client