//lets say you want to find the property on the `resp` object
//that contains the url of the request

request.get('http://example.com/foo/bar', (err, resp, body) => {
  console.dir(findMatchingProperty(resp, v => typeof v === 'string' && v.match(/\/foo\/bar/)));
});


/**
The result is:

[ '.request.path',
  '.request.href',
  '.request.uri.path',
  '.request.uri.href',
  '.request.uri.pathname',
  '.socket._httpMessage.path',
  '.socket._httpMessage._header' ]
 */