Re: [Rails] Facebook login on mobile app through a rails app

On Thu, Jan 17, 2013 at 7:35 PM, Ignacio Piantanida <napoplate@gmail.com> wrote:

2013/1/17 Nicolas Desprès <nicolas.despres@gmail.com>

On Wed, Jan 16, 2013 at 6:17 PM, Vitor HP <vitorhp2@gmail.com> wrote:

Hi folks.

Hi,

 

I'm building a rails app that provides an api for a mobile app.

I have the same setup.

 

The mobile app requires the user to login through his facebook account.

My question is about who should be responsible for requesting the login.

The mobile app or the rails app.

So far, the mobile app login using the Facebook SDK and use that information to log into the Rails app. The Rails server uses Devise+Omniauth. 

Right now I am not really happy with this since I can't figure out how the Rails app can use the login information retrieved via the mobile app to interact with the Facebook platform.

I will write more as soon as I have further information.

Regards,

--
Nicolas Desprès

The mobile app should do the login process. It then should send to the server the "access token" given by Facebook.
With this token you are able to identify your user through the "graph api".

Well this is point where I am stuck. As describe here : https://developers.facebook.com/docs/howtos/login/server-side-login/ I understand how works the server-side authentication process and it works well using a web browser. What I don't really understand are the steps the mobile app has to do. Does it have to follow all the redirection ? That could imply to write a lot of code on the mobile app side. It does not look like just a couple of GET and POST to send.

--
Nicolas Desprès

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