impress/app/controllers/sessions_controller.rb

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class SessionsController < ApplicationController
rescue_from Openneo::Auth::Session::InvalidSignature, :with => :invalid_signature
rescue_from Openneo::Auth::Session::MissingParam, :with => :missing_param
before_filter :initialize_session, :only => [new]
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skip_before_filter :verify_authenticity_token, :only => [:create]
def new
redirect_to Openneo::Auth.remote_auth_url(params, session)
end
def create
session = Openneo::Auth::Session.from_params(params)
session.save!
render :text => 'Success'
end
def destroy
warden.logout
redirect_to root_path
end
protected
def initialize_session
session[:session_initialization_placeholder] = nil
end
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def invalid_signature(exception)
render :text => "Signature did not match. Check secret.",
:status => :unprocessable_entity
end
def missing_param(exception)
render :text => exception.message, :status => :unprocessable_entity
end
end