Added GitHub Oauth registration and login

Added GitHub Oauth which uses JWT REST API for authenticating users.

Fixes anitab-org#101

README.md

@@ -87,7 +87,8 @@ 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
     ```
@@ -129,13 +130,27 @@ Follow the given instructions for Login into the app.
 	6. Click Create & View.
 	7. The API KEY is generated and displayed to you just once. So be sure to copy and save it somewhere.
 
+3. `GITHUB_CALLBACK_URL` - For using GitHub authentication the **Callback URL** is required by GitHub API. Add this env variable in `.env` file or export it to use **Callback URL** which you used while setting Up GitHub App. The default value is: `http://localhost:3000/login`.
+
 Add it to your .env file as follows:
 ```
 export SENDGRID_API_KEY=<your-sendgrid-api-key>
 ```
 
 3. `SECRET_KEY`  - This environment variable is required for running the backend. Add `SECRET_KEY` in `.env` file or export it by using `export SECRET_KEY=<YOUR SECRET KEY>`.
 
+# 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 GitHub app. Fill in the information as given in the image.
+   ![social_add](https://user-images.githubusercontent.com/56037184/109975941-35816f80-7d21-11eb-9a8f-205953306c83.png)
+   **For creating GitHub App see [this docs](https://docs.github.com/en/developers/apps/creating-a-github-app).**
 
 ## Testing
 

main/settings.py

@@ -48,6 +48,13 @@
     "corsheaders",
     "osp",
     "token_auth",
+    # For Social Authentications
+    "dj_rest_auth",
+    "django.contrib.sites",
+    "allauth",
+    "allauth.account",
+    "allauth.socialaccount",
+    "allauth.socialaccount.providers.github",
 ]
 
 MIDDLEWARE = [
@@ -61,6 +68,8 @@
     "django.middleware.clickjacking.XFrameOptionsMiddleware",
 ]
 
+SITE_ID = 2
+
 ROOT_URLCONF = "main.urls"
 
 TEMPLATES = [
@@ -83,11 +92,14 @@
     "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",
     ),
 }
 
+REST_USE_JWT = True
+
 SIMPLE_JWT = {
     "ACCESS_TOKEN_LIFETIME": timedelta(days=2),
     "REFRESH_TOKEN_LIFETIME": timedelta(days=30),
@@ -160,3 +172,10 @@
 # https://docs.djangoproject.com/en/3.0/howto/static-files/
 
 STATIC_URL = "/static/"
+
+ACCOUNT_EMAIL_VERIFICATION = "none"
+
+if os.environ.get("GITHUB_CALLBACK_URL"):
+    GITHUB_CALLBACK_URL = os.getenv("GITHUB_CALLBACK_URL")
+else:
+    GITHUB_CALLBACK_URL = "http://localhost:3000/login"

requirements.txt

@@ -1,36 +1,51 @@
+appdirs==1.4.4
 asgiref==3.2.7
 astroid==2.4.1
+black==20.8b1
 certifi==2020.6.20
 cffi==1.14.1
 chardet==3.0.4
+click==7.1.2
 cryptography==3.0
+defusedxml==0.6.0
 distro==1.5.0
+dj-rest-auth==2.1.3
 Django==3.0.7
+django-allauth==0.44.0
 django-cors-headers==3.3.0
 django-sendgrid-v5==0.8.1
 djangorestframework==3.11.0
 djangorestframework-jwt==1.11.0
 djangorestframework-simplejwt==4.4.0
+flake8==3.8.4
 future==0.18.2
 idna==2.10
-isort==4.3.21
+isort==5.7.0
 lazy-object-proxy==1.4.3
 matrix-client==0.3.2
 mccabe==0.6.1
+mypy-extensions==0.4.3
+oauthlib==3.1.0
+pathspec==0.8.1
 psycopg2==2.8.5
+pycodestyle==2.6.0
 pycparser==2.20
+pyflakes==2.2.0
 PyJWT==1.7.1
-pylint==2.5.2
 pyOpenSSL==19.1.0
 python-dotenv==0.13.0
 python-http-client==3.2.7
+python3-openid==3.2.0
 pytz==2020.1
+regex==2020.11.13
 requests==2.24.0
+requests-oauthlib==1.3.0
 sendgrid==6.3.1
 six==1.15.0
 sqlparse==0.3.1
 toml==0.10.1
 typed-ast==1.4.1
+typing-extensions==3.7.4.3
 urllib3==1.25.10
 wrapt==1.12.1
-zulip==0.7.0
+zulip==0.7.0

token_auth/urls.py

@@ -2,6 +2,7 @@
 from django.urls import path
 from rest_framework_simplejwt.views import TokenObtainPairView, TokenRefreshView
 
+from token_auth.views.github_oauth import GithubLogin
 from token_auth.views.register import RegisterView
 
 urlpatterns = [
@@ -14,4 +15,5 @@
     # login URLs
     path("token/", TokenObtainPairView.as_view(), name="token_obtain_pair"),
     path("refresh/", TokenRefreshView.as_view(), name="token_refresh"),
+    path("github/", GithubLogin.as_view(), name="github_login"),
 ]

token_auth/views/github_oauth.py

@@ -0,0 +1,11 @@
+from allauth.socialaccount.providers.github.views import GitHubOAuth2Adapter
+from allauth.socialaccount.providers.oauth2.client import OAuth2Client
+from dj_rest_auth.registration.views import SocialLoginView
+from django.conf import settings
+
+
+class GithubLogin(SocialLoginView):
+    authentication_classes = []
+    adapter_class = GitHubOAuth2Adapter
+    callback_url = settings.GITHUB_CALLBACK_URL
+    client_class = OAuth2Client