Using Facebook Connect with Authlogic

Authlogic Facebook Connect Snafu

Hey, maybe I can help on this one, just had this problem not very long time ago...

Facebook connect is outdated. All the cool kids are now using Facebook Graph with OAuth. Facebook team have even closed the documentation for Facebook Connect.

Anyway, that goes for Authlogic Facebook connect, it simply does not work anymore.

In the end, I kept using Authlogic for normal login and account management, but for Facebook connect I wrote my own code.

Chances are you may have used facebooker gem. Uninstall that gem, but keep the config/facebooker.yml file.

Try this:

1. Keep using config/facebooker.yml by adding this code inside config/initializers/load_config.rb (you need to create this file)

   config = YAML.load_file("#{Rails.root}/config/facebooker.yml") || {}

   facebook_config = config['common'] || {}

   facebook_config.update(config[Rails.env] || {})

   FB_CONFIG = facebook_config.symbolize_keys

2. Add this code inside your user_controller.rb:

def facebook_oauth_callback
  if not params[:code].nil?
    callback = url_for(:host => APP_CONFIG[:host], :controller => 'gallery/user', :action => 'facebook_oauth_callback')
    url = URI.parse("https://graph.facebook.com/oauth/access_token?client_id=#{FB_CONFIG[:application_id]}&redirect_uri=#{callback}&client_secret=#{FB_CONFIG[:secret_key]}&code=#{CGI::escape(params[:code])}")
    http = Net::HTTP.new(url.host, url.port) http.use_ssl = (url.scheme == 'https') tmp_url = url.path + "?" + url.query
    request = Net::HTTP::Get.new(tmp_url)
    response = http.request(request)
    data = response.body
    access_token = data.split("=")[1]
    if access_token.blank?
      flash[:notice] = 'An error occurred while connecting through Facebook, please try again later.' 
    else
      url = URI.parse("https://graph.facebook.com/me?access_token=#{CGI::escape(access_token)}")
      http = Net::HTTP.new(url.host, url.port)
      http.use_ssl = (url.scheme == 'https')
      tmp_url = url.path + "?" + url.query
      request = Net::HTTP::Get.new(tmp_url)
      response = http.request(request)
      user_data = response.body
      user_data_obj = JSON.parse(user_data)
      @user = User.new_or_find_by_facebook_oauth_access_token(access_token, {:user_data => user_data_obj})

      if @user.new_record?
        session[:user] = @user
        session[:external_app] = "Facebook"
        redirect_to(:action => 'new_details')
      else
        user_session = UserSession.create(@user)
        flash[:notice] = "Successfully logged in."
        redirect_back_or_default root_url
      end
    end
  end
end

def create_facebook
  redirect_to("https://graph.facebook.com/oauth/authorize?client_id=#{FB_CONFIG[:application_id]}&redirect_uri=" + 
    url_for(:host => APP_CONFIG[:host], :controller => 'gallery/user', :action => 'facebook_oauth_callback') + 
    "&scope=email,offline_access")
end

1. Add the find method inside your User model (app/models/user.rb):

      def self.new_or_find_by_facebook_oauth_access_token(access_token, options = {})
        user = User.find_by_facebook_oauth_access_token(access_token)
        if user.blank?
          #code to create new user here
        end
        user
      end

1. Add link to action create_facebook in the view, something like

   <%= link_to image_tag('gallery/button-facebook.png', :title => "register with Facebook", :alt => "register with Facebook"), {:action => 'create_facebook'}, {:target => '_parent'} %>

Explanation

1. In the first step you created a file to get config data from facebooker.yml
2. In second step, you basically created two functions, one for sending user to facebook site (create_facebook) and another to capture the callback data (facebook_oauth_callback) the idea was from this page: http://www.wisejive.com/2010/05/facebook-oauth-on-rails.html
3. In third step, you just added a method inside User model to find, or create new if not found, a user based on the information returned from facebook.

The code only works on my project, do not just copy-paste it but learn it line-by-line. Over time I realised it is better to use simple code you can understand rather than using other's complicated plugin you cannot fix when things go awry...

Session bug using facebook-connect-with-authlogic in Rails

Yes you should be able to still use the cookies and sessions in harmony; Facebook sets & uses cookies (afaik) regardless of how your application's sessions are configured.

The cattr_accessor :current_user is used elsewhere in our application (for reasons I can't recall right now) and should really be left out of the post. Thanks for bringing it up! Yes, there should still be a current_user method in ApplicationController.

Apologies that it took so long to respond, you sent the Twitter message to me at 1am my time, I read it at 3am (due to somebody drumming next door) and I've been busy today up until now (4pm)! I sincerly hopes this helps and if you need more help I should be around for a while yet!

Ruby on Rails: Authlogic Facebook integration: Link accounts with user input instead of automatically using email address

Someone else may be able to point you at the perfect gem for this, but I can tell you that I've worked on a similar problem and it wasn't much work to roll our own, based on the oauth2 gem.

Here's a sketch of the code/flow I use.

1) User clicks on 'Connect to Facebook' and this sends you to an action like this

def to_facebook
    options = {
      :redirect_uri => facebook_callback_url,
      :scope => "email,publish_stream" # whatever you want to do
    }
    client = OAuth2::Client.new(FACEBOOK_API_KEY, FACEBOOK_API_SECRET, :site => FACEBOOK_API_SITE)

    redirect_to client.web_server.authorize_url(options)
end

2) User goes over to facebook and gives you all the access you want, then facebook calls the callback you specified facebook_callback_url which should take you to an action like this:

def facebook_callback
    client = OAuth2::Client.new(FACEBOOK_API_KEY, FACEBOOK_API_SECRET, :site => FACEBOOK_API_SITE)
    access_token = client.web_server.get_access_token(params[:code], :redirect_uri => facebook_callback_url)

    do_my_custom_user_association(access_token)
end

Then you can specify whatever you want in do_my_custom_user_association, you should have a current_user available from authlogic if someone is logged in, so you can redirect to a flow that lets the logged in user select if they want to merge into their current account or a different one. If there's no current user, you can send them to a create account flow, with some facebook data attached.

Note that this is just a sketch, there are error cases to handle (e.g. facebook_callback will be hit with the param error_reason if the get_acccess_token fails) and I'm not recommending you do all the oauth2 interaction right in your controller, but the basic idea is there.

See http://developers.facebook.com/docs/authentication/ if any of the oauth2 interactions don't make sense.

Login with Facebook with authlogic and omniauth-facebook

Please take a look to my response on:

Devise, Omniauth and Facebook integration session error

You can find more tutorial on:

https://github.com/plataformatec/devise/wiki/OmniAuth:-Overview

single-sign-on authentication using Facebook on Rails -- AuthLogic or Devise?

Here are a railscast about devise + omniauth:

simple omniauth

You'll also find on the same website two others railscasts about devise and omniauth.

Authlogic Facebook Connect and cucumber

I had the same issue with my test suite after installing authlogic_facebook_connect.
I applied the following patch to the plugin and it solved the problem:

http://gist.github.com/221893

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