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.portal.lastmodified;
24  
25  import com.liferay.portal.kernel.servlet.BrowserSniffer;
26  import com.liferay.portal.kernel.servlet.HttpHeaders;
27  import com.liferay.portal.kernel.util.ParamUtil;
28  import com.liferay.portal.model.ColorScheme;
29  import com.liferay.portal.model.Theme;
30  import com.liferay.portal.service.impl.ThemeLocalUtil;
31  import com.liferay.portal.theme.ThemeDisplay;
32  import com.liferay.portal.util.WebKeys;
33  
34  import javax.servlet.http.HttpServletRequest;
35  import javax.servlet.http.HttpServletResponse;
36  
37  import org.apache.struts.action.Action;
38  import org.apache.struts.action.ActionForm;
39  import org.apache.struts.action.ActionForward;
40  import org.apache.struts.action.ActionMapping;
41  
42  /**
43   * <a href="LastModifiedAction.java.html"><b><i>View Source</i></b></a>
44   *
45   * @author Brian Wing Shun Chan
46   *
47   */
48  public abstract class LastModifiedAction extends Action {
49  
50      public ActionForward execute(
51              ActionMapping mapping, ActionForm form, HttpServletRequest req,
52              HttpServletResponse res)
53          throws Exception {
54  
55          ThemeDisplay themeDisplay =
56              (ThemeDisplay)req.getAttribute(WebKeys.THEME_DISPLAY);
57  
58          Theme theme = themeDisplay.getTheme();
59          ColorScheme colorScheme = themeDisplay.getColorScheme();
60  
61          String themeId = ParamUtil.getString(req, "themeId");
62          String colorSchemeId = ParamUtil.getString(req, "colorSchemeId");
63  
64          // The layout id is not always passed to this request. Therefore,
65          // ServicePreAction could set the wrong theme and color scheme. This
66          // check ensures that the theme and color scheme used is the one passed
67          // to it from the request parameters.
68  
69          // See:
70          //     com.liferay.common.taglib.IncludeTag
71          //     com.liferay.portal.events.ServicePreAction
72          //     /c/portal/css
73          //     /c/portal/css_cached
74          //     /c/portal/javascript
75          //     /c/portal/javascript_cached
76  
77          if ((theme == null) || (colorScheme == null) ||
78              (!theme.getThemeId().equals(themeId)) ||
79              (!colorScheme.getColorSchemeId().equals(colorSchemeId))) {
80  
81              boolean wapTheme = BrowserSniffer.is_wap_xhtml(req);
82  
83              theme = ThemeLocalUtil.getTheme(
84                  themeDisplay.getCompanyId(), themeId, wapTheme);
85              colorScheme = ThemeLocalUtil.getColorScheme(
86                  themeDisplay.getCompanyId(), themeId, colorSchemeId, wapTheme);
87  
88              themeDisplay.setLookAndFeel(theme, colorScheme);
89  
90              req.setAttribute(WebKeys.THEME, theme);
91              req.setAttribute(WebKeys.COLOR_SCHEME, colorScheme);
92          }
93  
94          res.addHeader(HttpHeaders.CACHE_CONTROL, "max-age=0");
95  
96          res.setDateHeader(
97              HttpHeaders.LAST_MODIFIED, System.currentTimeMillis());
98  
99          return mapping.findForward("modified.jsp");
100     }
101 
102     public abstract String getLastModifiedKey(HttpServletRequest req);
103 
104     public abstract String getLastModifiedValue(String key);
105 
106     public abstract void setLastModifiedValue(String key, String value);
107 
108 }