gistfile1.js

var util = require('./util');

module.exports = function(jsgiReq) {
  return Object.create(jsgiReq, {
    isXMLHttpRequest: getter(function() {
      return !util.no(this.headers['x-requested-with']);
    }),
    _paramGroups: {
      routeParams: {
        value: {},
        enumerable: true
      },
      search: getter(function() {
        return util.extractSearch(jsgiReq);
      })
    }, 
    params: getter(function() {
      var tmp = {}, self = this;

      Object.keys(this._paramGroups).forEach(function(group) {
        tmp = util.merge(tmp, self._paramGroups[group])
      });

      return tmp;
    })
  });
};

/**
 * Helper function to create property descriptor that is enumerable
 * and has a getter.
 *
 * @param fn {Function}  The getter function.
 * @api private
 */
function getter(fn) {
  return {
    get: fn,
    enumerable: true
  }
}