# File lib/chef_zero/endpoints/environment_cookbook_endpoint.rb, line 8
      def get(request)
        cookbook_name = request.rest_path[5]
        environment = FFI_Yajl::Parser.parse(get_data(request, request.rest_path[0..3]), :create_additions => false)
        constraints = environment['cookbook_versions'] || {}
        cookbook_versions = list_data(request, request.rest_path[0..1] + request.rest_path[4..5])
        if request.query_params['num_versions'] == 'all'
          num_versions = nil
        elsif request.query_params['num_versions']
          num_versions = request.query_params['num_versions'].to_i
        else
          num_versions = nil
        end
        json_response(200, format_cookbooks_list(request, { cookbook_name => cookbook_versions }, constraints, num_versions))
      end