try_files

# File actionpack/lib/action_dispatch/middleware/static.rb, line 107
      def try_files(filepath, content_type, accept_encoding))
        headers = { "Content-Type" => content_type }

        if compressible? content_type
          try_precompressed_files filepath, headers, accept_encoding: accept_encoding
        elsif file_readable? filepath
          [ filepath, headers ]
        end
      end