Social login also accepts an authentication code instead of an access token.

docs/api_endpoints.rst

@@ -73,3 +73,4 @@ Basing on example from installation section :doc:`Installation </installation>`
 - /rest-auth/facebook/ (POST)
 
     - access_token
+    - code

rest_auth/registration/serializers.py

@@ -9,15 +9,17 @@ class SocialLoginSerializer(serializers.Serializer):
     access_token = serializers.CharField(required=True)
 
     def validate(self, attrs):
-        access_token = attrs.get('access_token')
+
         view = self.context.get('view')
         request = self.context.get('request')
         if not isinstance(request, HttpRequest):
             request = request._request
 
         if not view:
-            raise serializers.ValidationError('View is not defined, pass it ' +
+            raise serializers.ValidationError(
-                'as a context variable')
+                'View is not defined, pass it ' +
+                'as a context variable'
+            )
         self.adapter_class = getattr(view, 'adapter_class', None)
 
         if not self.adapter_class:
@@ -25,6 +27,32 @@ class SocialLoginSerializer(serializers.Serializer):
 
         self.adapter = self.adapter_class()
         app = self.adapter.get_provider().get_app(request)
+
+        # More info on code vs access_token
+        # http://stackoverflow.com/questions/8666316/facebook-oauth-2-0-code-and-token
+        # We have the access_token straight
+        if('access_token' in attrs):
+            access_token = attrs.get('access_token')
+        # We did not get the access_token, but authorization code instead
+        elif('code' in attrs):
+            code = attrs.get('code')
+
+            callback_url = self.callback_url
+
+            provider = self.adapter.get_provider()
+            scope = provider.get_scope(request)
+            client = self.adapter_class(
+                request,
+                app.client_id,
+                app.secret,
+                self.adapter.access_token_method,
+                self.adapter.access_token_url,
+                callback_url,
+                scope
+            )
+            token = client.get_access_token(code)
+            access_token = token['access_token']
+
         token = self.adapter.parse_token({'access_token': access_token})
         token.app = app
 

rest_auth/registration/views.py

@@ -72,11 +72,25 @@ class VerifyEmail(APIView, ConfirmEmailView):
 class SocialLogin(Login):
     """
     class used for social authentications
-    example usage for facebook
+    example usage for facebook with access_token
 
+    -------------
     from allauth.socialaccount.providers.facebook.views import FacebookOAuth2Adapter
+
     class FacebookLogin(SocialLogin):
         adapter_class = FacebookOAuth2Adapter
+
+    -------------
+    example usage for facebook with code
+
+    from allauth.socialaccount.providers.facebook.views import FacebookOAuth2Adapter
+    from allauth.socialaccount.providers.oauth2.client import OAuth2Client
+
+    class FacebookLogin(SocialLogin):
+        adapter_class = FacebookOAuth2Adapter
+        client_class = OAuth2Client
+        callback_url = 'localhost:8000'
+    -------------
     """
 
     serializer_class = SocialLoginSerializer