1   /**
2    * Copyright (c) 2000-2009 Liferay, Inc. All rights reserved.
3    *
4    * The contents of this file are subject to the terms of the Liferay Enterprise
5    * Subscription License ("License"). You may not use this file except in
6    * compliance with the License. You can obtain a copy of the License by
7    * contacting Liferay, Inc. See the License for the specific language governing
8    * permissions and limitations under the License, including but not limited to
9    * distribution rights of the Software.
10   *
11   * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
12   * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
13   * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
14   * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
15   * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
16   * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
17   * SOFTWARE.
18   */
19  
20  package com.liferay.portlet.rss.util;
21  
22  import com.liferay.portal.kernel.util.Time;
23  import com.liferay.portal.kernel.webcache.WebCacheException;
24  import com.liferay.portal.kernel.webcache.WebCacheItem;
25  
26  import com.sun.syndication.feed.synd.SyndFeed;
27  import com.sun.syndication.io.SyndFeedInput;
28  import com.sun.syndication.io.XmlReader;
29  
30  import java.net.URL;
31  
32  /**
33   * <a href="RSSWebCacheItem.java.html"><b><i>View Source</i></b></a>
34   *
35   * @author Brian Wing Shun Chan
36   *
37   */
38  public class RSSWebCacheItem implements WebCacheItem {
39  
40      public RSSWebCacheItem(String url) {
41          _url = url;
42      }
43  
44      public Object convert(String key) throws WebCacheException {
45          SyndFeed feed = null;
46  
47          try {
48  
49              // com.liferay.portal.kernel.util.HttpUtil will break the connection
50              // if it spends more than 5 seconds looking up a location. However,
51              // German umlauts do not get encoded correctly. This may be a bug
52              // with commons-httpclient or with how FeedParser uses
53              // java.io.Reader.
54  
55              // Use http://xml.newsisfree.com/feeds/29/629.xml and
56              // http://test.domosoft.com/up/RSS to test if German umlauts show
57              // up correctly.
58  
59              /*Reader reader = new StringReader(
60                  new String(HttpUtil.URLtoByteArray(_url)));
61  
62              channel = FeedParser.parse(builder, reader);*/
63  
64              SyndFeedInput input = new SyndFeedInput();
65  
66              feed = input.build(new XmlReader(new URL(_url)));
67          }
68          catch (Exception e) {
69              throw new WebCacheException(_url + " " + e.toString());
70          }
71  
72          return feed;
73      }
74  
75      public long getRefreshTime() {
76          return _REFRESH_TIME;
77      }
78  
79      private static final long _REFRESH_TIME = Time.MINUTE * 20;
80  
81      private String _url;
82  
83  }