Module: Sinatra::ReFacebookRegister

Defined in:
lib/refacebook/sinatra.rb

Instance Method Summary collapse

Instance Method Details

#require_facebook(*args) ⇒ Object

ReFacebook configuration done at the beginning of a Sinatra file.

An example:

require_facebook(:api_key =>'MY_API_KEY',
                 :secret_key => 'MY_SECRET_KEY',
                 :canvas_url => 'http://apps.facebook.com/canvas-page',
                 :require_login => true,
                 :store => store)
:api_key

Your application’s Facebook API key.

:secret_key

Your application’s Facebook Secret key.

:canvas_url

The full path to your canvas page.

:require_login

If this is set to true then the user is redirected to

the login page where she needs to authenticate.

:store

This currently uses memcache-client as the session store since

Rack doesn’t currently have non cookie based session stores.



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# File 'lib/refacebook/sinatra.rb', line 42

def require_facebook *args
  settings = args[0]

  configure do
    set :canvas_url, settings[:canvas_url]
  end

  before do 
    # Passes the request to the correct request method since canvas requests
    # come in as POSTs.
    if params["fb_sig_in_canvas"].eql? "1" and params["fb_sig_request_method"].eql? "GET"
      request.env['REQUEST_METHOD'] = 'GET' 
    end

    if params['fb_sig_session_key']
      @fbsession = settings[:store].get(params['fb_sig_session_key'])
      @fbsession = ReFacebook::Session.new(settings[:api_key], settings[:secret_key]) unless @fbsession
      @fbsession.update_session_params(params)

      expiry = @fbsession.expires.to_i - @fbsession.time.to_i
      settings[:store].set(params['fb_sig_session_key'], @fbsession, expiry)
    else
      # Just return a session, even if it's not a lasting session.
      @fbsession = ReFacebook::Session.new(settings[:api_key], settings[:secret_key])
    end

    if settings[:require_login] and !params['fb_sig_session_key']
      fbml_redirect(@fbsession.(:next => link_from_canvas(request.fullpath),
                                             :canvas => true))
    end
  end
end