1   /**
2    * Copyright (c) 2000-2008 Liferay, Inc. All rights reserved.
3    *
4    * Permission is hereby granted, free of charge, to any person obtaining a copy
5    * of this software and associated documentation files (the "Software"), to deal
6    * in the Software without restriction, including without limitation the rights
7    * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
8    * copies of the Software, and to permit persons to whom the Software is
9    * furnished to do so, subject to the following conditions:
10   *
11   * The above copyright notice and this permission notice shall be included in
12   * all copies or substantial portions of the Software.
13   *
14   * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15   * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16   * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
17   * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
18   * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
19   * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
20   * SOFTWARE.
21   */
22  
23  package com.liferay.portlet.blogs.util;
24  
25  import com.liferay.portal.kernel.util.HttpUtil;
26  import com.liferay.portal.kernel.util.Tuple;
27  import com.liferay.portal.kernel.util.Validator;
28  import com.liferay.portal.service.UserLocalServiceUtil;
29  import com.liferay.portlet.blogs.model.BlogsEntry;
30  import com.liferay.portlet.messageboards.model.MBMessage;
31  import com.liferay.portlet.messageboards.service.MBMessageLocalServiceUtil;
32  
33  import java.util.ArrayList;
34  import java.util.Collections;
35  import java.util.List;
36  
37  import org.apache.commons.logging.Log;
38  import org.apache.commons.logging.LogFactory;
39  
40  /**
41   * <a href="TrackbackVerifierUtil.java.html"><b><i>View Source</i></b></a>
42   *
43   * @author Alexander Chow
44   *
45   */
46  public class TrackbackVerifierUtil {
47  
48      public static void addNewPost(
49          long messageId, String url, String trackbackUrl) {
50  
51          _trackbacks.add(new Tuple(messageId, url, trackbackUrl));
52      }
53  
54      public static void verifyNewPosts() {
55          Tuple tuple = null;
56  
57          while (!_trackbacks.isEmpty()) {
58              synchronized (_trackbacks) {
59                  tuple = _trackbacks.remove(0);
60              }
61  
62              long messageId = (Long)tuple.getObject(0);
63              String url = (String)tuple.getObject(1);
64              String trackbackUrl = (String)tuple.getObject(2);
65  
66              _verifyPost(messageId, url, trackbackUrl);
67          }
68      }
69  
70      public static void verifyPost(BlogsEntry entry, MBMessage message)
71          throws Exception {
72  
73          long messageId = message.getMessageId();
74          String trackbackURL = "/-/blogs/trackback/" + entry.getUrlTitle();
75          String body = message.getBody();
76          String url = null;
77  
78          int start = body.indexOf("[url=");
79  
80          if (start > -1) {
81              start += "[url=".length();
82  
83              int end = body.indexOf("]", start);
84  
85              if (end > -1) {
86                  url = body.substring(start, end);
87              }
88          }
89  
90          if (Validator.isNotNull(url)) {
91              long companyId = message.getCompanyId();
92              long userId = message.getUserId();
93              long defaultUserId = UserLocalServiceUtil.getDefaultUserId(
94                  companyId);
95  
96              if (userId == defaultUserId) {
97                  _verifyPost(messageId, url, trackbackURL);
98              }
99          }
100     }
101 
102     private static void _verifyPost(
103         long messageId, String url, String trackbackURL) {
104 
105         try {
106             String result = HttpUtil.URLtoString(url);
107 
108             if (result.contains(trackbackURL)) {
109                 return;
110             }
111         }
112         catch (Exception e) {
113         }
114 
115         try {
116             MBMessageLocalServiceUtil.deleteDiscussionMessage(
117                 messageId);
118         }
119         catch (Exception e) {
120             _log.error(
121                 "Error trying to delete trackback message " + messageId, e);
122         }
123     }
124 
125     private static Log _log = LogFactory.getLog(TrackbackVerifierUtil.class);
126 
127     private static List<Tuple> _trackbacks =
128         Collections.synchronizedList(new ArrayList<Tuple>());
129 
130 }