Retrieve full url from shortened url using axios and js

Question

https://s.lazada.com.my/s.ny94J

Given the shortened url is as above, when paste it in a browser, it will redirect me with full url where I can extract the product id from it

But in my code, I can't seem to expand it

try {
        const response = await axios.get(url, { maxRedirects: 5 });
        console.log('Res', response.request.res);
        const finalUrl =
          response.request.res.responseUrl || response.config.url; // Resolved URL
        console.log('Resolved Final URL:', finalUrl);
        const match = finalUrl.match(/-i(\d+)-/);
        if (match) {
          console.log('Product ID extracted from resolved URL:', match[1]);
          return match[1];
        }
      } catch (error) {
        console.error(
          'Error resolving mobile shortened link:',
          error.response?.data || error.message
        );
        throw error;
      }

Where the response.request.res.responseUrl also return https://s.lazada.com.my/s.ny94J

Answer 1

Your code would work if the redirection was caused by a 302 Found response. But this website does it differently: It responds with 200 OK and an HTML page that contains a <meta http-equiv="refresh"> element. This redirects you only after the browser has loaded and parsed the HTML page.

You would have to perform such parsing in your Node.js code. Here is a very rudimentary way to do it:

const response = await axios.get("https://s.lazada.com.my/s.ny94J");
console.log(response.data.match(
  /<meta http-equiv="refresh" content=".*?;url=(.*?)"/
)[1]);