Warden strategy for Devise

gistfile1.rb

module Devise
    module Strategies
      class RemoteAuthenticatable < Authenticatable
        #
        # For an example check : https://github.com/plataformatec/devise/blob/master/lib/devise/strategies/database_authenticatable.rb
        #
        # Method called by warden to authenticate a resource.
        #
        def authenticate!
          #
          # authentication_hash doesn't include the password
          #
          auth_params = authentication_hash
          auth_params[:password] = password

          #
          # mapping.to is a wrapper over the resource model
          #
          resource = mapping.to.new

          return fail! unless resource

          # remote_authentication method is defined in Devise::Models::RemoteAuthenticatable
          #
          # validate is a method defined in Devise::Strategies::Authenticatable. It takes
          #a block which must return a boolean value.
          #
          # If the block returns true the resource will be loged in
          # If the block returns false the authentication will fail!
          #
          if validate(resource){ resource.remote_authentication(auth_params) }
            success!(resource)
          end
        end
      end
    end
  end