How to use the url.port function in url

// we try to convert url to short form while ensuring maximum compatibility
			// stripe off scheme
			index = request.url.indexOf('//');
			if(index != -1) {
				path = request.url.slice(index+2);
			}
			// stripe off hostname
			index = path.indexOf('/');
			if(index != -1) {
				urlObj.path = path.slice(index);
			}
			return urlObj;
		}
	}
	urlObj = url.parse(request.url); //TODO: optimize by writing reg maybe?
	url.port = url.port || 80;
	return urlObj;
};

(urlObj.scheme === 'https' && urlObj.port === 443)) {
		delete urlObj.port;
	}

	return url.format(urlObj);
}

// scheme, host, port, and base URI
var appInfo = JSON.parse(process.env.VCAP_APPLICATION || "{}");
if (process.env.LDP_BASE) {
	// LDP_BASE env var set
	exports.ldpBase = addSlash(process.env.LDP_BASE);
	var url = url.parse(exports.ldpBase);
	exports.scheme = url.scheme;
	exports.host = url.host;
	exports.port = url.port;
	exports.context = url.pathname;
	exports.appBase = toURL({
		protocol: exports.scheme,
		host: exports.host,
		port: exports.port
	});
} else {
	// no LDP_BASE set
	exports.scheme = (process.env.VCAP_APP_PORT) ? 'http' :config.scheme;
	if (appInfo.application_uris) {
		exports.host = appInfo.application_uris[0];
	} else {
		exports.host = process.env.HOSTNAME || config.host;
	}

	// public port is the default in a Bluemix environment

var i = 0;
    var method = parsed.request.split(" ")[0];
    var url = url.parse(parsed.request.split(" ")[1]);
    var http_version = parsed.request.split(" ")[2];

    parsed[request_labels[i]] = method;
    i++;
    parsed[request_labels[i]] = url.href;
    i++;
    parsed[request_labels[i]] = http_version;
    i++;
    parsed[request_labels[i]] = url.protocol;
    i++;
    parsed[request_labels[i]] = url.hostname;
    i++;
    parsed[request_labels[i]] = url.port;
    i++;
    parsed[request_labels[i]] = url.pathname;
    i++;
    parsed[request_labels[i]] = url.query;

  } else {
    request_labels.forEach(function(label) {
      parsed[label] = '-';
    });
  }

  return parsed;
};

function Insight(href, opts) {
  this.opts = opts || {};
  this.url = url.parse(href);
  if(!url.port)
    url.port = 3000;
}

function Insight(href, opts) {
  this.opts = opts || {};
  this.url = url.parse(href);
  if(!url.port)
    url.port = 3000;
}

function Bitcoind(href, opts) {
  this.opts = opts || {};
  this.url = url.parse(href);
  if(!url.port)
    url.port = 8332;
};

function Bitcoind(href, opts) {
  this.opts = opts || {};
  this.url = url.parse(href);
  if(!url.port)
    url.port = 8332;
};