Connect facebook phonegap login with django allauth

Question

I\'m building up an app that should allow the user to sign up / sign in with Facebook and then he should be able to login (always via Facebook)

Answer 1

One common way of doing things is to leave all registration related functionality up to the website. In your phonegap app you can simply point the user to /accounts/login/ using the In-App-Browser (IAB). The IAB has events like loadstart and exit that you should monitor. A simple way of monitoring whether or not the user is successfully logged in is to have him redirected to a specific url, say /accounts/login/complete/, at the end of the login. If you attach a token to that return url (as in /accounts/login/complete/?token=123) you will be able to parse that token in your app. You could simply use the session ID as a token.

A more secure way is to use the django-oauth2-provider app and actually implement a proper oauth handshake. Handling that is almost the same. Using IAB open /oauth/authenticate/, you will be asked to login using allauth, then an oauth2 confirmation dialog appears, after which the oauth grant code is passed to a success URL. You can pick that code up from phonegap and using AJAX calls from within the phonegap app you can fetch the oauth access token. Btw, django-rest-framework has builtin support for django-oauth2-provider (don't know about tastypie).

A completely different approach is to implement a Facebook login in your mobile app, completely independent from the web site. Once logged in you'll be handed over a Facebook access token. Now, you can send this token over to the web site. Given the token, the website can fetch the user (https://graph.facebook.com/me?access_token=...), check whether or not that user is already known, if so return an appropriate token/session for that user, if not, create the user account and also return a token.