001 package org.apache.turbine.modules.actions.sessionvalidator;
002
003 /*
004 * Licensed to the Apache Software Foundation (ASF) under one
005 * or more contributor license agreements. See the NOTICE file
006 * distributed with this work for additional information
007 * regarding copyright ownership. The ASF licenses this file
008 * to you under the Apache License, Version 2.0 (the
009 * "License"); you may not use this file except in compliance
010 * with the License. You may obtain a copy of the License at
011 *
012 * http://www.apache.org/licenses/LICENSE-2.0
013 *
014 * Unless required by applicable law or agreed to in writing,
015 * software distributed under the License is distributed on an
016 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
017 * KIND, either express or implied. See the License for the
018 * specific language governing permissions and limitations
019 * under the License.
020 */
021
022 import org.apache.commons.configuration.Configuration;
023
024 import org.apache.commons.lang.StringUtils;
025
026 import org.apache.commons.logging.Log;
027 import org.apache.commons.logging.LogFactory;
028
029 import org.apache.turbine.Turbine;
030 import org.apache.turbine.TurbineConstants;
031
032 import org.apache.turbine.pipeline.PipelineData;
033 import org.apache.turbine.services.security.TurbineSecurity;
034
035 import org.apache.turbine.util.RunData;
036 import org.apache.turbine.util.TurbineException;
037
038 /**
039 * SessionValidator that requires login for use with Template Services
040 * like Velocity or WebMacro.
041 *
042 * <br>
043 *
044 * Templating services requires a different Session Validator
045 * because of the way it handles screens. If you use the WebMacro or
046 * Velocity Service with the DefaultSessionValidator, users will be able to
047 * bypass login by directly addressing the template using
048 * template/index.wm. This is because the Page class looks for the
049 * keyword "template" in the Path information and if it finds it will
050 * reset the screen using it's lookup mechanism and thereby bypass
051 * Login.
052 *
053 * Note that you will need to set the template.login property to the
054 * login template.
055 *
056 * @author <a href="mailto:john.mcnally@clearink.com">John D. McNally</a>
057 * @author <a href="mailto:mbryson@mont.mindspring.com">Dave Bryson</a>
058 * @author <a href="mailto:hps@intermeta.de">Henning P. Schmiedehausen</a>
059 * @author <a href="mailto:peter@courcoux.biz">Peter Courcoux</a>
060 * @version $Id: TemplateSecureSessionValidator.java 1066518 2011-02-02 16:30:53Z ludwig $
061 */
062 public class TemplateSecureSessionValidator
063 extends SessionValidator
064 {
065 /** Logging */
066 private static Log log = LogFactory.getLog(
067 TemplateSecureSessionValidator.class);
068
069 /**
070 * doPerform is virtually identical to DefaultSessionValidator
071 * except that it calls template methods instead of bare screen
072 * methods. For example, it uses <code>setScreenTemplate</code> to
073 * load the tr.props TEMPLATE_LOGIN instead of the default's
074 * setScreen to TurbineConstants.SCREEN_LOGIN.
075 * @deprecated Use PipelineData version instead.
076 * @see DefaultSessionValidator
077 * @param data Turbine information.
078 * @throws TurbineException The anonymous user could not be obtained
079 * from the security service
080 */
081 @Deprecated
082 @Override
083 public void doPerform(RunData data)
084 throws TurbineException
085 {
086 Configuration conf = Turbine.getConfiguration();
087
088 // Pull user from session.
089 data.populate();
090
091 // The user may have not logged in, so create a "guest/anonymous" user.
092 if (data.getUser() == null)
093 {
094 log.debug("Fixing up empty User Object!");
095 data.setUser(TurbineSecurity.getAnonymousUser());
096 data.save();
097 }
098
099 // This is the secure sessionvalidator, so user must be logged in.
100 if (!data.getUser().hasLoggedIn())
101 {
102 log.debug("User is not logged in!");
103
104 // only set the message if nothing else has already set it
105 // (e.g. the LogoutUser action).
106 if (StringUtils.isEmpty(data.getMessage()))
107 {
108 data.setMessage(conf.getString(TurbineConstants.LOGIN_MESSAGE));
109 }
110
111 // Set the screen template to the login page.
112 String loginTemplate =
113 conf.getString(TurbineConstants.TEMPLATE_LOGIN);
114
115 log.debug("Sending User to the Login Screen ("
116 + loginTemplate + ")");
117 data.getTemplateInfo().setScreenTemplate(loginTemplate);
118
119 // We're not doing any actions buddy! (except action.login which
120 // will have been performed already)
121 data.setAction(null);
122 }
123
124 log.debug("Login Check finished!");
125
126 // Make sure we have some way to return a response.
127 if (!data.hasScreen() && StringUtils.isEmpty(
128 data.getTemplateInfo().getScreenTemplate()))
129 {
130 String template = conf.getString(
131 TurbineConstants.TEMPLATE_HOMEPAGE);
132
133 if (StringUtils.isNotEmpty(template))
134 {
135 data.getTemplateInfo().setScreenTemplate(template);
136 }
137 else
138 {
139 data.setScreen(conf.getString(
140 TurbineConstants.SCREEN_HOMEPAGE));
141 }
142 }
143
144 // The session_access_counter can be placed as a hidden field in
145 // forms. This can be used to prevent a user from using the
146 // browsers back button and submitting stale data.
147 // FIXME!! a template needs to be written to use this with templates.
148
149 if (data.getParameters().containsKey("_session_access_counter")
150 && !TurbineSecurity.isAnonymousUser(data.getUser()))
151 {
152 // See comments in screens.error.InvalidState.
153 if (data.getParameters().getInt("_session_access_counter")
154 < (((Integer) data.getUser().getTemp(
155 "_session_access_counter")).intValue() - 1))
156 {
157 if (data.getTemplateInfo().getScreenTemplate() != null)
158 {
159 data.getUser().setTemp("prev_template",
160 data.getTemplateInfo().getScreenTemplate()
161 .replace('/', ','));
162 data.getTemplateInfo().setScreenTemplate(conf.getString(
163 TurbineConstants.TEMPLATE_INVALID_STATE));
164 }
165 else
166 {
167 data.getUser().setTemp("prev_screen",
168 data.getScreen().replace('/', ','));
169 data.setScreen(conf.getString(
170 TurbineConstants.SCREEN_INVALID_STATE));
171 }
172 data.getUser().setTemp("prev_parameters", data.getParameters());
173 data.setAction("");
174 }
175 }
176
177 // We do not want to allow both a screen and template parameter.
178 // The template parameter is dominant.
179 if (data.getTemplateInfo().getScreenTemplate() != null)
180 {
181 data.setScreen(null);
182 }
183 }
184
185 /**
186 * doPerform is virtually identical to DefaultSessionValidator
187 * except that it calls template methods instead of bare screen
188 * methods. For example, it uses <code>setScreenTemplate</code> to
189 * load the tr.props TEMPLATE_LOGIN instead of the default's
190 * setScreen to TurbineConstants.SCREEN_LOGIN.
191 *
192 * @see DefaultSessionValidator
193 * @param pipelineData Turbine information.
194 * @throws TurbineException The anonymous user could not be obtained
195 * from the security service
196 */
197 @Override
198 public void doPerform(PipelineData pipelineData)
199 throws TurbineException
200 {
201 RunData data = getRunData(pipelineData);
202 doPerform(data);
203 }
204
205
206 }