| AJAXAction.java |
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.portal.struts;
24
25 import com.liferay.portal.kernel.servlet.HttpHeaders;
26 import com.liferay.portal.kernel.util.ContentTypes;
27 import com.liferay.portal.util.PortalUtil;
28
29 import java.io.PrintWriter;
30
31 import javax.servlet.http.HttpServletRequest;
32 import javax.servlet.http.HttpServletResponse;
33
34 import org.apache.struts.action.Action;
35 import org.apache.struts.action.ActionForm;
36 import org.apache.struts.action.ActionForward;
37 import org.apache.struts.action.ActionMapping;
38
39 /**
40 * <a href="AJAXAction.java.html"><b><i>View Source</i></b></a>
41 *
42 * @author Brian Wing Shun Chan
43 *
44 */
45 public abstract class AJAXAction extends Action {
46
47 public ActionForward execute(
48 ActionMapping mapping, ActionForm form, HttpServletRequest request,
49 HttpServletResponse response)
50 throws Exception {
51
52 String text = null;
53
54 try {
55 text = getText(mapping, form, request, response);
56 }
57 catch (Exception e) {
58 PortalUtil.sendError(
59 HttpServletResponse.SC_INTERNAL_SERVER_ERROR, e, request,
60 response);
61
62 return null;
63 }
64
65 response.setContentType(ContentTypes.TEXT_PLAIN_UTF8);
66 response.setHeader(HttpHeaders.CACHE_CONTROL, "no-cache");
67
68 PrintWriter pw = response.getWriter();
69
70 pw.write(text);
71
72 pw.close();
73
74 return null;
75 }
76
77 public abstract String getText(
78 ActionMapping mapping, ActionForm form, HttpServletRequest request,
79 HttpServletResponse response)
80 throws Exception;
81
82 }