Redirect with java.net.HttpURLConnection

        HttpURLConnection conn = (HttpURLConnection) new URL(url).openConnection();
        conn.setRequestMethod("GET");
        int status = conn.getResponseCode();
        boolean redirect = false;
        if (status == HttpURLConnection.HTTP_MOVED_TEMP || status == HttpURLConnection.HTTP_MOVED_PERM
                || status == HttpURLConnection.HTTP_SEE_OTHER) {
            // redirect
            String newUrl = conn.getHeaderField("Location");
            log.debug("Redirect " + url + " -> " + newUrl);
            redirect = true;
            conn = (HttpURLConnection) new URL(newUrl).openConnection();
            conn.setRequestMethod("GET");
        }
        status = conn.getResponseCode();
        if (status == HttpURLConnection.HTTP_OK) {
            String encoding = null;
            if (conn.getContentEncoding() != null) {
                encoding = conn.getContentEncoding();
            } else {
                encoding = "UTF-8";
            }
            try (BufferedReader br = new BufferedReader(new InputStreamReader(conn.getInputStream(), encoding))) {
                return br.readLine();
            }
        } else {
            throw new IOException("connect failed: response-code: " + status);
        }