new URL() - WHATWG URL API
As Joshua Wise pointed out on Github (https://github.com/nodejs/node/issues/12682), the problem is that request.url is NOT an absolute URL. It can be used as a path or relative URL, but it is missing the host and protocol.
Following the API documentation, you can construct a valid URL by supplying a base URL as the second argument. This is still awkward because the protocol is not easily available from request.headers. I simply assumed HTTP:
var baseURL = 'http://' + request.headers.host + '/';var myURL = new URL(request.url, baseURL);This is obviously not an ideal solution, but at least you can take advantage of the query string parsing. For example,
URL { href: 'http://localhost:8080/?key1=value1&key2=value2', origin: 'http://localhost:8080', protocol: 'http:', username: '', password: '', host: 'localhost:8080', hostname: 'localhost', port: '8080', pathname: '/', search: '?key1=value1&key2=value2', searchParams: URLSearchParams { 'key1' => 'value1', 'key2' => 'value2' }, hash: '' }