1   /**
2    * Copyright (c) 2000-2010 Liferay, Inc. All rights reserved.
3    *
4    * This library is free software; you can redistribute it and/or modify it under
5    * the terms of the GNU Lesser General Public License as published by the Free
6    * Software Foundation; either version 2.1 of the License, or (at your option)
7    * any later version.
8    *
9    * This library is distributed in the hope that it will be useful, but WITHOUT
10   * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
11   * FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
12   * details.
13   */
14  
15  package com.liferay.portlet.rss.util;
16  
17  import com.liferay.portal.kernel.util.Time;
18  import com.liferay.portal.kernel.webcache.WebCacheException;
19  import com.liferay.portal.kernel.webcache.WebCacheItem;
20  
21  import com.sun.syndication.feed.synd.SyndFeed;
22  import com.sun.syndication.io.SyndFeedInput;
23  import com.sun.syndication.io.XmlReader;
24  
25  import java.net.URL;
26  
27  /**
28   * <a href="RSSWebCacheItem.java.html"><b><i>View Source</i></b></a>
29   *
30   * @author Brian Wing Shun Chan
31   */
32  public class RSSWebCacheItem implements WebCacheItem {
33  
34      public RSSWebCacheItem(String url) {
35          _url = url;
36      }
37  
38      public Object convert(String key) throws WebCacheException {
39          SyndFeed feed = null;
40  
41          try {
42  
43              // com.liferay.portal.kernel.util.HttpUtil will break the connection
44              // if it spends more than 5 seconds looking up a location. However,
45              // German umlauts do not get encoded correctly. This may be a bug
46              // with commons-httpclient or with how FeedParser uses
47              // java.io.Reader.
48  
49              // Use http://xml.newsisfree.com/feeds/29/629.xml and
50              // http://test.domosoft.com/up/RSS to test if German umlauts show
51              // up correctly.
52  
53              /*Reader reader = new StringReader(
54                  new String(HttpUtil.URLtoByteArray(_url)));
55  
56              channel = FeedParser.parse(builder, reader);*/
57  
58              SyndFeedInput input = new SyndFeedInput();
59  
60              feed = input.build(new XmlReader(new URL(_url)));
61          }
62          catch (Exception e) {
63              throw new WebCacheException(_url + " " + e.toString());
64          }
65  
66          return feed;
67      }
68  
69      public long getRefreshTime() {
70          return _REFRESH_TIME;
71      }
72  
73      private static final long _REFRESH_TIME = Time.MINUTE * 20;
74  
75      private String _url;
76  
77  }