Express router for accepting a URL as route parameter

Imagine you want to build a webpage health checker. I want users to send GET requests to https://localhost/check/{valid_url_here} and I send a request to that URL. I couldn’t find proper way of writing the correct router for this in Express.

This is the closest answer but it trims the url after ? adding it to req.query

router.get('/check/:url*', (req, res) => {})

so when URL is https://example.com/?print=1 the variable req.params.url misses the ?print part… I want to capture anything that comes after /check/

>Solution :

router.use("/check", function(req, res) {
  var url = req.url.substring(1);
});

Then https://localhost/check/https://example.com/?print=1 leads to url = "https://example.com/?print=1".