Java tutorial
/** * This file Copyright (c) 2003-2012 Magnolia International * Ltd. (http://www.magnolia-cms.com). All rights reserved. * * * This file is dual-licensed under both the Magnolia * Network Agreement and the GNU General Public License. * You may elect to use one or the other of these licenses. * * This file is distributed in the hope that it will be * useful, but AS-IS and WITHOUT ANY WARRANTY; without even the * implied warranty of MERCHANTABILITY or FITNESS FOR A * PARTICULAR PURPOSE, TITLE, or NONINFRINGEMENT. * Redistribution, except as permitted by whichever of the GPL * or MNA you select, is prohibited. * * 1. For the GPL license (GPL), you can redistribute and/or * modify this file under the terms of the GNU General * Public License, Version 3, as published by the Free Software * Foundation. You should have received a copy of the GNU * General Public License, Version 3 along with this program; * if not, write to the Free Software Foundation, Inc., 51 * Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * 2. For the Magnolia Network Agreement (MNA), this file * and the accompanying materials are made available under the * terms of the MNA which accompanies this distribution, and * is available at http://www.magnolia-cms.com/mna.html * * Any modifications to this file must keep this entire header * intact. * */ package info.magnolia.cms.security.auth.callback; import info.magnolia.cms.beans.config.MIMEMapping; import info.magnolia.cms.i18n.Messages; import info.magnolia.cms.i18n.MessagesManager; import info.magnolia.cms.security.auth.login.LoginResult; import info.magnolia.freemarker.FreemarkerUtil; import info.magnolia.init.MagnoliaConfigurationProperties; import java.util.HashMap; import java.util.Map; import javax.inject.Inject; import javax.security.auth.login.LoginException; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import org.apache.commons.lang.ClassUtils; import org.slf4j.Logger; import org.slf4j.LoggerFactory; /** * Renders a login form using Freemarker and the template configured with {@link #loginForm}. * * $Id$ */ public class FormClientCallback extends AbstractHttpClientCallback { private static final Logger log = LoggerFactory.getLogger(FormClientCallback.class); public static final String ERROR_STRING = "errorString"; public static final String SERVICE_CONTACT = "serviceContact"; private MagnoliaConfigurationProperties configurationProperties; private String loginForm; @Inject public FormClientCallback(MagnoliaConfigurationProperties configurationProperties) { this.configurationProperties = configurationProperties; } @Override public void handle(HttpServletRequest request, HttpServletResponse response) { try { if (!response.isCommitted()) { response.setContentType("text/html"); if (null == request.getCharacterEncoding()) { response.setCharacterEncoding(MIMEMapping.getContentEncodingOrDefault("text/html")); } } FreemarkerUtil.process(getLoginForm(), getMessages(), response.getWriter()); } catch (Throwable t) { log.error("exception while writing login template", t); } } public String getLoginForm() { return loginForm; } public void setLoginForm(String loginForm) { this.loginForm = loginForm; } /** * simply sets "errorString" in case of login exception. * override this to pass more objects to the freemarker template. * @return an empty map */ protected Map<String, Object> getMessages() { LoginResult loginResult = LoginResult.getCurrentLoginResult(); LoginException exception = loginResult.getLoginException(); Map<String, Object> messages = new HashMap<String, Object>(); if (null != exception) { final String exName = ClassUtils.getShortClassName(exception, null); final Messages mm = MessagesManager.getMessages(); final String defaultMessage = mm.get("login.defaultError"); messages.put(ERROR_STRING, mm.getWithDefault("login." + exName, defaultMessage)); } String serviceContact = this.configurationProperties.getProperty("magnolia.service.contact"); if (serviceContact != null) { messages.put(SERVICE_CONTACT, serviceContact); } return messages; } }