ZkLoginDialogCtrl.java

/**
 * Copyright 2010 the original author or authors.
 * 
 * This file is part of Zksample2. http://zksample2.sourceforge.net/
 *
 * Zksample2 is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 * 
 * Zksample2 is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with Zksample2.  If not, see <http://www.gnu.org/licenses/gpl.html>.
 */
package de.forsthaus.webui.login;

import java.io.IOException;
import java.io.InputStream;
import java.io.Serializable;
import java.net.URL;
import java.net.URLConnection;
import java.util.Date;

import org.apache.log4j.Logger;
import org.zkoss.zk.ui.Executions;
import org.zkoss.zk.ui.event.Event;
import org.zkoss.zul.Button;
import org.zkoss.zul.Label;
import org.zkoss.zul.Textbox;
import org.zkoss.zul.Window;

import de.forsthaus.webui.util.WindowBaseCtrl;
import de.forsthaus.webui.util.ZksampleDateFormat;

/**
 * ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++<br>
 * This is the controller class for the /WEB-INF/zkloginDialog.zul file.<br>
 * ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++<br>
 * 
 * The Login action is defined in the zul-file where the login Button is from
 * html type 'submit'.
 * 
 * @author bbruhns
 * @author sgerth
 */
public class ZkLoginDialogCtrl extends WindowBaseCtrl implements Serializable {

	private final static Logger logger = Logger.getLogger(ZkLoginDialogCtrl.class);
	private static final long serialVersionUID = -71422545405325060L;

	/*
	 * ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
	 * All the components that are defined here and have a corresponding
	 * component with the same 'id' in the zul-file are getting autowired by our
	 * 'extends WindowBaseCtrl'.
	 * ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
	 */
	protected Window loginwin; // autowired
	protected Label lbl_ServerTime; // autowired
	protected Textbox txtbox_Username; // autowired
	protected Textbox txtbox_Password; // autowired
	protected Button btnReset;

	/**
	 * default constructor. <br>
	 */
	public ZkLoginDialogCtrl() {
		super();
	}

	public void onCreate$loginwin(Event event) throws Exception {
		doOnCreateCommon(this.loginwin); // do the autowire

		// only for testing
		this.txtbox_Username.setValue("admin");
		this.txtbox_Password.setValue("admin");

		this.txtbox_Username.focus(); // set the focus on UserName

		this.loginwin.setShadow(false);
		this.loginwin.doModal();

	}

	public void onClick$btnReset(Event event) {

		this.txtbox_Username.setValue("");
		this.txtbox_Password.setValue("");
		this.txtbox_Username.focus(); // set the focus on UserName

	}

	/**
	 * when the "close" button is clicked. <br>
	 * 
	 * @throws IOException
	 */
	public void onClick$button_ZKLoginDialog_Close() throws IOException {

		Executions.sendRedirect("/j_spring_logout");
	}

	/**
	 * when the "getServerTime" button is clicked. <br>
	 * 
	 * @throws IOException
	 */
	public void onClick$button_ZKLoginDialog_ServerTime() throws IOException {
		// logger.debug("get the server date/time");

		// TODO get the tomcat servers time, if the TimeServer doesn't answers.
		final long l = getCurrentHttpTokenTime();

		// FIXME Zeitzone wird hier ignoriert! Es ist nicht ersichtig, in
		// welcher Zeitzone der Server läuft.
		final String dateStr = ZksampleDateFormat.getDateTimeLongFormater().format(l);

		this.lbl_ServerTime.setMultiline(true);
		this.lbl_ServerTime.setValue("time on synchronization-server:\n" + dateStr);
	}

	/**
	 * Get the actual date/time on server. <br>
	 * Not used at time.<br>
	 * 
	 * @return String of date/time
	 */
	private String getDateTime() {
		return ZksampleDateFormat.getDateTimeLongFormater().format(new Date());
	}

	/**
	 * Get a date/time from a web server for our one-time-password
	 * synchronizing.<br>
	 * <br>
	 * We became our time with calling a PHP Function on a webserver.<br>
	 * This time-Url and time is used only for synchronizing the tokenizer <br>
	 * application on the users PC and the server method for calculate the <br>
	 * user token. So the running user-application must have an internet access. <br>
	 * In the case of non internet connection of the users pc, the tokenizer<br>
	 * takes the time from the users pc clock. So the user can set the pc clock
	 * to the servers time manually.<br>
	 * 
	 * <pre>
	 * File: time.php
	 * --------------
	 * 1. <?php
	 * 2. echo mktime();
	 * 3. ?>
	 * --------------
	 * End-File. = 3 lines
	 * </pre>
	 * 
	 * @return
	 */
	private long getCurrentHttpTokenTime() {

		final String urlString = "http://unixtime.forsthaus.de/time.php";

		try {
			final URL url = new URL(urlString);
			final URLConnection conn = url.openConnection();
			final InputStream istream = conn.getInputStream();
			try {
				final StringBuilder sb = new StringBuilder();

				int ch = -1;
				while ((ch = istream.read()) != -1) {
					sb.append((char) ch);
				}
				final long l1 = Long.parseLong(sb.toString());

				return l1 * 1000;
			} catch (final NumberFormatException e) {
				throw new RuntimeException(e);
			} finally {
				istream.close();
			}
		} catch (final IOException e) {
			throw new RuntimeException(e);
		}

	}

}