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1   /*
2    * Licensed to the Apache Software Foundation (ASF) under one
3    * or more contributor license agreements.  See the NOTICE file
4    * distributed with this work for additional information
5    * regarding copyright ownership.  The ASF licenses this file
6    * to you under the Apache License, Version 2.0 (the
7    * "License"); you may not use this file except in compliance
8    * with the License.  You may obtain a copy of the License at
9    *
10   *   http://www.apache.org/licenses/LICENSE-2.0
11   *
12   * Unless required by applicable law or agreed to in writing,
13   * software distributed under the License is distributed on an
14   * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
15   * KIND, either express or implied.  See the License for the
16   * specific language governing permissions and limitations
17   * under the License.
18   */
19  
20  package org.apache.myfaces.tobago.lifecycle;
21  
22  import org.apache.myfaces.tobago.config.TobagoConfig;
23  import org.apache.myfaces.tobago.webapp.Secret;
24  import org.slf4j.Logger;
25  import org.slf4j.LoggerFactory;
26  
27  import javax.faces.context.FacesContext;
28  import javax.faces.event.PhaseEvent;
29  import javax.faces.event.PhaseId;
30  import javax.faces.event.PhaseListener;
31  
32  public class SecretPhaseListener implements PhaseListener {
33  
34    private static final Logger LOG = LoggerFactory.getLogger(SecretPhaseListener.class);
35  
36    @Override
37    public void afterPhase(final PhaseEvent event) {
38      final FacesContext facesContext = event.getFacesContext();
39      if (!facesContext.getResponseComplete()
40          && facesContext.isPostback()
41          && TobagoConfig.getInstance(facesContext).isCheckSessionSecret()
42          && !Secret.check(facesContext)) {
43        if (LOG.isDebugEnabled()) {
44          LOG.debug("Secret is invalid!");
45        }
46        facesContext.renderResponse();
47      }
48    }
49  
50    @Override
51    public void beforePhase(final PhaseEvent event) {
52    }
53  
54    @Override
55    public PhaseId getPhaseId() {
56      return PhaseId.RESTORE_VIEW;
57    }
58  }