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 for use with the Template Service, the
040 * TemplateSessionValidator is virtually identical to the
041 * TemplateSecureValidator except that it does not transfer to the
042 * login page when it detects a null user (or a user not logged in).
043 *
044 * <p>The Template Service requires a different Session Validator
045 * because of the way it handles screens.
046 *
047 * <p>Note that you will need to set the template.login property to the
048 * login template.
049 *
050 * @see TemplateSecureSessionValidator
051 * @author <a href="mailto:john.mcnally@clearink.com">John D. McNally</a>
052 * @author <a href="mailto:mbryson@mont.mindspring.com">Dave Bryson</a>
053 * @author <a href="mailto:hps@intermeta.de">Henning P. Schmiedehausen</a>
054 * @author <a href="mailto:peter@courcoux.biz">Peter Courcoux</a>
055 * @version $Id: TemplateSessionValidator.java 1066518 2011-02-02 16:30:53Z ludwig $
056 */
057 public class TemplateSessionValidator
058 extends SessionValidator
059 {
060 /** Logging */
061 private static Log log = LogFactory.getLog(TemplateSessionValidator.class);
062
063 /**
064 * Execute the action.
065 *
066 * @deprecated Use PipelineData version instead.
067 * @param data Turbine information.
068 * @exception TurbineException The anonymous user could not be obtained
069 * from the security service
070 */
071 @Deprecated
072 @Override
073 public void doPerform(RunData data)
074 throws TurbineException
075 {
076 Configuration conf = Turbine.getConfiguration();
077
078 // Pull user from session.
079 data.populate();
080
081 // The user may have not logged in, so create a "guest/anonymous" user.
082 if (data.getUser() == null)
083 {
084 log.debug("Fixing up empty User Object!");
085 data.setUser(TurbineSecurity.getAnonymousUser());
086 data.save();
087 }
088
089 // make sure we have some way to return a response
090 if (!data.hasScreen() && StringUtils.isEmpty(
091 data.getTemplateInfo().getScreenTemplate()))
092 {
093 String template = conf.getString(
094 TurbineConstants.TEMPLATE_HOMEPAGE);
095
096 if (StringUtils.isNotEmpty(template))
097 {
098 data.getTemplateInfo().setScreenTemplate(template);
099 }
100 else
101 {
102 data.setScreen(conf.getString(
103 TurbineConstants.SCREEN_HOMEPAGE));
104 }
105 }
106 // the session_access_counter can be placed as a hidden field in
107 // forms. This can be used to prevent a user from using the
108 // browsers back button and submitting stale data.
109 else if (data.getParameters().containsKey("_session_access_counter")
110 && !TurbineSecurity.isAnonymousUser(data.getUser()))
111 {
112 // See comments in screens.error.InvalidState.
113 if (data.getParameters().getInt("_session_access_counter")
114 < (((Integer) data.getUser().getTemp(
115 "_session_access_counter")).intValue() - 1))
116 {
117 if (data.getTemplateInfo().getScreenTemplate() != null)
118 {
119 data.getUser().setTemp("prev_template",
120 data.getTemplateInfo().getScreenTemplate()
121 .replace('/', ','));
122 data.getTemplateInfo().setScreenTemplate(conf.getString(
123 TurbineConstants.TEMPLATE_INVALID_STATE));
124 }
125 else
126 {
127 data.getUser().setTemp("prev_screen",
128 data.getScreen().replace('/', ','));
129 data.setScreen(conf.getString(
130 TurbineConstants.SCREEN_INVALID_STATE));
131 }
132 data.getUser().setTemp("prev_parameters", data.getParameters());
133 data.setAction("");
134 }
135 }
136
137 // we do not want to allow both a screen and template parameter.
138 // The template parameter is dominant.
139 if (data.getTemplateInfo().getScreenTemplate() != null)
140 {
141 data.setScreen(null);
142 }
143 }
144
145 /**
146 * Execute the action.
147 *
148 * @param pipelineData Turbine information.
149 * @exception TurbineException The anonymous user could not be obtained
150 * from the security service
151 */
152 @Override
153 public void doPerform(PipelineData pipelineData)
154 throws TurbineException
155 {
156 RunData data = getRunData(pipelineData);
157 doPerform(data);
158 }
159
160
161
162
163 }