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.weather.util;
24  
25  import com.liferay.portal.kernel.util.GetterUtil;
26  import com.liferay.portal.kernel.util.HtmlUtil;
27  import com.liferay.portal.kernel.util.HttpUtil;
28  import com.liferay.portal.kernel.webcache.WebCacheException;
29  import com.liferay.portal.kernel.webcache.WebCacheItem;
30  import com.liferay.portlet.weather.model.Weather;
31  import com.liferay.util.Time;
32  
33  /**
34   * <a href="WeatherWebCacheItem.java.html"><b><i>View Source</i></b></a>
35   *
36   * @author Brian Wing Shun Chan
37   *
38   */
39  public class WeatherWebCacheItem implements WebCacheItem {
40  
41      public WeatherWebCacheItem(String zip) {
42          _zip = zip;
43      }
44  
45      public Object convert(String key) throws WebCacheException {
46          Weather weather = null;
47  
48          try {
49              String text = HtmlUtil.stripComments(HttpUtil.URLtoString(
50                  "http://weather.yahoo.com/search/weather2?p=" +
51                      HttpUtil.encodeURL(_zip)));
52  
53              int x = text.indexOf("forecast-temperature");
54  
55              x = text.indexOf("h3>", x) + 3;
56  
57              int y = text.indexOf("&deg;", x);
58  
59              float temperature = GetterUtil.getFloat(text.substring(x, y));
60  
61              x = text.indexOf("background:url(", x);
62              x = text.indexOf("http://", x);
63  
64              y = text.indexOf(".png", x) - 1;
65  
66              String iconURL = text.substring(x, y) + "s.png";
67  
68              weather = new Weather(_zip, iconURL, temperature);
69          }
70          catch (Exception e) {
71              throw new WebCacheException(_zip);
72          }
73  
74          return weather;
75      }
76  
77      public long getRefreshTime() {
78          return _REFRESH_TIME;
79      }
80  
81      private static final long _REFRESH_TIME = Time.MINUTE * 20;
82  
83      private String _zip;
84  
85  }