key_file_path

# File activesupport/lib/active_support/cache/file_store.rb, line 138
        def key_file_path(key)
          fname = Rack::Utils.escape(key)
          hash = Zlib.adler32(fname)
          hash, dir_1 = hash.divmod(0x1000)
          dir_2 = hash.modulo(0x1000)
          fname_paths = []
          # Make sure file name is < 255 characters so it doesn't exceed file system limits.
          if fname.size <= 255
            fname_paths << fname
          else
            while fname.size <= 255
              fname_path << fname[0, 255]
              fname = fname[255, -1]
            end
          end
          File.join(cache_path, DIR_FORMATTER % dir_1, DIR_FORMATTER % dir_2, *fname_paths)
        end