source-changed-MailPasswordKey

public void doPost(HttpServletRequest request, HttpServletResponse response)
	throws ServletException, IOException {
   [...]
   String subject = "Forgotten password";
	String url =
	   WMuteAdressGetter.getWintermuteHostAdress()
		+ "/exec/changepass.jsp?key="
		+ key;
	   String content =
		"To change your password go to <a href=""
		+ url
		+ "">"
		+ url
		+ "</a>"
		+ " As the server's ip address
                is changing regulary, the link may be outdated soon."
		+ " If this has happend, you can repeat your request
                for a password key any time again. "
		+ "Have a nice day! ."
		+ configuration.getName();
		Mail.getInstance().sendMail(receiver, subject, content);
  [...]

public class WMuteAdressGetter {
   final static String HEADER = "http://";
   static String PORT = ":";
   public static String getWintermuteHostAdress() {
	AppConfiguration configuration = Application.get().getConfiguration();
	String ipUrl = configuration.getProperty("app.ipurl");
	HttpURLConnection httpCon;
	String result = "HOST_ADRESS_FROM_WINTERMUTE.DE/HOME";
	try {
	   URL url = new URL(ipUrl);
   	   httpCon = (HttpURLConnection) url.openConnection();
	   httpCon.setFollowRedirects(true);
	   BufferedReader in =
		new BufferedReader(
		new InputStreamReader(httpCon.getInputStream()));
   	   String line;
	   StringBuffer sb = new StringBuffer();
	   while ((line = in.readLine()) != null) {
		sb.append(line);
	   }
	   in.close();
	   httpCon.disconnect();
	   result = HEADER + parseIP(sb.toString()) + PORT + 
              configuration.getProperty("app.port");
	} catch (UnknownHostException e) {
	} catch (IOException e) {
	}
      return result;
   }
   /**
    * Method parseIP.
    * @param string
    * @return String
    */
    private static String parseIP(String string) {
	String result = "wintermute.de/home";
	Pattern p =
	   Pattern.compile(
		".*\\s((?:[0-9]{1,3}[.]){3}(?:[0-9]{1,3})).*",
		Pattern.DOTALL);
        Matcher m = p.matcher(string);
	boolean b = m.matches();
	if (b) {
           int start = m.start(1);
           int end = m.end(1);
           result = string.substring(start, end);
        }
	return result;
    }
}