How to use Facebook registration plugin
Hi, I want to implement sign in with Facebook in my Rails web application. I red about it from https://developers.facebook.com/docs/plugins/registration/.
My problem is I am not getting how to get the users data from signed request into my database. Please help me.
Thanks in advance!
this is the iframe code change the client_id and redirect_url with yours client id and redirect_url
<iframe src="https://www.facebook.com/plugins/registration? client_id=MY_CLIENT_ID& redirect_uri=MY_REDIRECT_URI& fields=name,email,first_name,last_name" scrolling="auto" frameborder="no" style="border:none" allowTransparency="true" width="100%" height="330"> </iframe>
it will automatically call the redirect_url provided here after clicking the register . in that method facebook will return you one variable "signed_request" that contains all the data for users. in the method you can decode the signed request . this is my code to decode the signed request
def decode_facebook_hash(signed_request) signature, str = signed_request.split('.') str += '=' * (4 - str.length.modulo(4)) ActiveSupport::JSON.decode(Base64.decode64(str.gsub("-", "+").gsub("_", "/"))) end
You can use the OmniAuth gem.
A railscast tutorial is available here: http://railscasts.com/episodes/241-simple-omniauth