1   /**
2    * Copyright (c) 2000-2009 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.rss.util;
24  
25  import com.liferay.portal.kernel.util.Time;
26  import com.liferay.portal.kernel.webcache.WebCacheException;
27  import com.liferay.portal.kernel.webcache.WebCacheItem;
28  
29  import com.sun.syndication.feed.synd.SyndFeed;
30  import com.sun.syndication.io.SyndFeedInput;
31  import com.sun.syndication.io.XmlReader;
32  
33  import java.net.URL;
34  
35  /**
36   * <a href="RSSWebCacheItem.java.html"><b><i>View Source</i></b></a>
37   *
38   * @author Brian Wing Shun Chan
39   *
40   */
41  public class RSSWebCacheItem implements WebCacheItem {
42  
43      public RSSWebCacheItem(String url) {
44          _url = url;
45      }
46  
47      public Object convert(String key) throws WebCacheException {
48          SyndFeed feed = null;
49  
50          try {
51  
52              // com.liferay.portal.kernel.util.HttpUtil will break the connection
53              // if it spends more than 5 seconds looking up a location. However,
54              // German umlauts do not get encoded correctly. This may be a bug
55              // with commons-httpclient or with how FeedParser uses
56              // java.io.Reader.
57  
58              // Use http://xml.newsisfree.com/feeds/29/629.xml and
59              // http://test.domosoft.com/up/RSS to test if German umlauts show
60              // up correctly.
61  
62              /*Reader reader = new StringReader(
63                  new String(HttpUtil.URLtoByteArray(_url)));
64  
65              channel = FeedParser.parse(builder, reader);*/
66  
67              SyndFeedInput input = new SyndFeedInput();
68  
69              feed = input.build(new XmlReader(new URL(_url)));
70          }
71          catch (Exception e) {
72              throw new WebCacheException(_url + " " + e.toString());
73          }
74  
75          return feed;
76      }
77  
78      public long getRefreshTime() {
79          return _REFRESH_TIME;
80      }
81  
82      private static final long _REFRESH_TIME = Time.MINUTE * 20;
83  
84      private String _url;
85  
86  }