Java URL Redirect getRedirectedUrl(String url)

Description

get Redirected Url

License

LGPL

Declaration

public static String getRedirectedUrl(String url) throws MalformedURLException, IOException 

Method Source Code

//package com.java2s;
//License from project: LGPL 

import java.io.IOException;

import java.net.HttpURLConnection;
import java.net.MalformedURLException;

import java.net.URL;

public class Main {
    public static String getRedirectedUrl(String url) throws MalformedURLException, IOException {
        HttpURLConnection connection;
        String finalUrl = url;//from   w  w  w .  ja va2  s  .  co m
        do {
            connection = (HttpURLConnection) new URL(finalUrl).openConnection();
            connection.setInstanceFollowRedirects(false);
            connection.setUseCaches(false);
            connection.setRequestMethod("GET");
            connection.connect();
            int responseCode = connection.getResponseCode();
            if (responseCode >= 300 && responseCode < 400) {
                String redirectedUrl = connection.getHeaderField("Location");
                if (redirectedUrl == null)
                    break;
                finalUrl = redirectedUrl;
            } else
                break;
        } while (connection.getResponseCode() != HttpURLConnection.HTTP_OK);
        connection.disconnect();
        return finalUrl.replaceAll(" ", "%20");
    }
}

Related

1. getRedirectUrl(final URL url)