node legacy url.parse deprecated, what to use instead?

Question

require('url').parse('someurl.com/page') have been docs-only deprecated, and our strict linter is unhappy about it... I have tried to replace it in our code with what the internet suggests new URL('someurl.com/page') which works in most cases.

However, we have examples where the url is a local image some/image.png and that was working nicely with url.parse() and returns:

Url {
  protocol: null,
  slashes: null,
  auth: null,
  host: null,
  port: null,
  hostname: null,
  hash: null,
  search: null,
  query: null,
  pathname: '/some/image.png',
  path: '/some/image.png',
  href: '/some/image.png'
}

But the suggested replacement new URL('some/image.png') throws a type error...

TypeError [ERR_INVALID_URL] [ERR_INVALID_URL]: Invalid URL: /some/image.png

url.parse is doing some validation and accept local paths, but the new url constructor does not. What to do ?

Answer 1

const server = http.createServer((req, res) => {
   const baseURL =  req.protocol + '://' + req.headers.host + '/';
   const reqUrl = new URL(req.url,baseURL);
   console.log(reqUrl);
});

will give reqUrl :

URL {
  href: 'http://127.0.0.1:3000/favicon.ico',
  origin: 'http://127.0.0.1:3000',
  protocol: 'http:',
  username: '',
  password: '',
  host: '127.0.0.1:3000',
  hostname: '127.0.0.1',
  port: '3000',
  pathname: '/favicon.ico',
  search: '',
  searchParams: URLSearchParams {},
  hash: ''
}

Answer 2

You can use the base parameter of the URL constructor. For example:

new URL('some/image-png', "https://dummyurl.com")

For more info, https://nodejs.org/api/url.html#url_constructor_new_url_input_base.

Answer 3

const path = require("path");
const url = require("url");

const p = path.join("public", "images", "a.jpg");

console.log(p);                                     // public\images\a.jpg
console.log(new url.URL(p, "http://xxx").pathname); // /public/images/a.jpg

Answer 4

This is how to get the query string params without using any external modules

const http = require("http");

const server = http.createServer((req, res) => {
  const url = new URL(req.url, `http://${req.headers.host}/`);

  const query = new URLSearchParams(url.search);
  console.log(query.entries());

  res.end("I am done");
});

server.listen(3000);