code: function(filepath, req, res) {
      var path = require("path"),
          config = module.exports.config,
          result = false,
          parentdir;
      do {
          var defaultdir = path.resolve(path.join(config.responsesdefault, filepath));
          parentdir = path.resolve(path.join(config.responses, filepath));
          if (isValidDir(parentdir) && isValidFile(path.join(parentdir, "index.js"))) {
              //Parent module response handler exists.
              require(parentdir)(req, res);
              result = true;
          } else if (isValidDir(defaultdir) && isValidFile(path.join(defaultdir, "index.js"))) {
              //Default response handler
              require(defaultdir)(req, res);
              result = true;
          }
          if (filepath === path.sep) break;
          filepath = path.dirname(filepath);
      } while (result === false && parentdir !== filepath);
      return result;
  }
docs: Join responses root folder to requested sub-directory
  id - sub-folder path
  req - http request http.IncomingMessage
  res - http response http.ServerResponse