View Javadoc

1   /*
2    * Copyright 2004-2008 the Seasar Foundation and the Others.
3    *
4    * Licensed under the Apache License, Version 2.0 (the "License");
5    * you may not use this file except in compliance with the License.
6    * You may obtain a copy of the License at
7    *
8    *     http://www.apache.org/licenses/LICENSE-2.0
9    *
10   * Unless required by applicable law or agreed to in writing, software
11   * distributed under the License is distributed on an "AS IS" BASIS,
12   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
13   * either express or implied. See the License for the specific language
14   * governing permissions and limitations under the License.
15   */
16  package org.seasar.cubby.validator.validators;
17  
18  import javax.servlet.http.HttpServletRequest;
19  import javax.servlet.http.HttpSession;
20  
21  import org.seasar.cubby.controller.ThreadContext;
22  import org.seasar.cubby.tags.TokenTag;
23  import org.seasar.cubby.util.TokenHelper;
24  import org.seasar.cubby.validator.ArrayFieldValidator;
25  import org.seasar.cubby.validator.MessageHelper;
26  import org.seasar.cubby.validator.ValidationContext;
27  import org.seasar.framework.message.MessageFormatter;
28  
29  /**
30   * 2重サブミットの検証をします。
31   * <p>
32   * ポストする画面で{@link TokenTag}を使用して、Actionクラスで TokenValidatorを使用することで、
33   * ２重サブミットを防止します。
34   * </p>
35   * <p>
36   * デフォルトエラーメッセージキー:valid.token
37   * </p>
38   * 
39   * @author agata
40   * @author baba
41   * @since 1.0.0
42   */
43  public class TokenValidator implements ArrayFieldValidator {
44  
45  	private final MessageHelper messageHelper;
46  
47  	/**
48  	 * コンストラクタ
49  	 */
50  	public TokenValidator() {
51  		this("valid.token");
52  	}
53  
54  	/**
55  	 * エラーメッセージキーを指定するコンストラクタ
56  	 * 
57  	 * @param messageKey
58  	 *            エラーメッセージキー
59  	 */
60  	public TokenValidator(final String messageKey) {
61  		this.messageHelper = new MessageHelper(messageKey);
62  	}
63  
64  	/**
65  	 * {@inheritDoc}
66  	 */
67  	public void validate(final ValidationContext context, final Object[] values) {
68  		if (values != null && values.length != 1) {
69  			context.addMessageInfo(this.messageHelper.createMessageInfo());
70  		} else {
71  			final String token = (String) values[0];
72  			final HttpServletRequest request = ThreadContext.getRequest();
73  			if (request == null) {
74  				throw new IllegalStateException(MessageFormatter.getMessage("ECUB0401", null));
75  			}
76  			final HttpSession session = request.getSession();
77  			if (!TokenHelper.validateToken(session, token)) {
78  				context.addMessageInfo(this.messageHelper.createMessageInfo());
79  			}
80  		}
81  	}
82  }