Tech-Rapids

Rapid is a section of a river where the river bed has a relatively steep gradient causing an increase in water velocity and turbulence. This blog aims to tackle similar rapids for it's readers in field of software technology by presenting many aspects of tools languages latest trends tips and features of various technologies. Many of these articles are related to hands-on problems faced and solved during the course of my experience, which might also help another distressed soul.

Thursday, September 3, 2009

Programatically determining redirected URL

In order to detect the redirect, you have to use setFollowRedirects(false). Otherwise, you end up on the redirected page anyway with a responseCode of 200. However you will have to navigate the redirected url yourself.

using java.net.HttpURLConnection

URL url = new URL(urlstring);
// Determine if the url has redirected
HttpURLConnection.setFollowRedirects(false);
HttpURLConnection uc = (HttpURLConnection) url.openConnection();
if(uc.getResponseCode() == 300 uc.getResponseCode() == 302)
{
String newUrl = uc.getHeaderField("Location");

}