app/controllers/doorkeeper/token_info_controller.rb


module Doorkeeper
  class TokenInfoController < ::Doorkeeper::ApplicationController
    def show
      if doorkeeper_token && doorkeeper_token.accessible?
        render :json => doorkeeper_token, :status => :ok
      else
        error = OAuth::ErrorResponse.new(:name => :invalid_request)
        response.headers.merge!(error.headers)
        render :json => error.body, :status => error.status
      end
    end
  end
end