1 /**
2 * This file Copyright (c) 2008-2010 Magnolia International
3 * Ltd. (http://www.magnolia-cms.com). All rights reserved.
4 *
5 *
6 * This file is dual-licensed under both the Magnolia
7 * Network Agreement and the GNU General Public License.
8 * You may elect to use one or the other of these licenses.
9 *
10 * This file is distributed in the hope that it will be
11 * useful, but AS-IS and WITHOUT ANY WARRANTY; without even the
12 * implied warranty of MERCHANTABILITY or FITNESS FOR A
13 * PARTICULAR PURPOSE, TITLE, or NONINFRINGEMENT.
14 * Redistribution, except as permitted by whichever of the GPL
15 * or MNA you select, is prohibited.
16 *
17 * 1. For the GPL license (GPL), you can redistribute and/or
18 * modify this file under the terms of the GNU General
19 * Public License, Version 3, as published by the Free Software
20 * Foundation. You should have received a copy of the GNU
21 * General Public License, Version 3 along with this program;
22 * if not, write to the Free Software Foundation, Inc., 51
23 * Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
24 *
25 * 2. For the Magnolia Network Agreement (MNA), this file
26 * and the accompanying materials are made available under the
27 * terms of the MNA which accompanies this distribution, and
28 * is available at http://www.magnolia-cms.com/mna.html
29 *
30 * Any modifications to this file must keep this entire header
31 * intact.
32 *
33 */
34 package info.magnolia.voting.voters;
35
36 import info.magnolia.context.MgnlContext;
37 import org.apache.commons.lang.StringUtils;
38
39 import javax.servlet.http.HttpServletResponse;
40 import java.util.ArrayList;
41 import java.util.List;
42
43 /**
44 * A voter which checks the content type set on the <strong>response<strong>
45 * object against a list of allowed and/or rejected content types.
46 *
47 * @author gjoseph
48 * @version $Revision: $ ($Author: $)
49 */
50 public class ResponseContentTypeVoter extends AbstractBoolVoter {
51 private static final org.slf4j.Logger log = org.slf4j.LoggerFactory.getLogger(ResponseContentTypeVoter.class);
52
53 private final List allowed = new ArrayList();
54 private final List rejected = new ArrayList();
55
56 public List getAllowed() {
57 return allowed;
58 }
59
60 public void addAllowed(String contentType) {
61 allowed.add(contentType);
62 }
63
64 public List getRejected() {
65 return rejected;
66 }
67
68 public void addRejected(String contentType) {
69 rejected.add(contentType);
70 }
71
72 protected boolean boolVote(Object value) {
73 final HttpServletResponse response;
74 if (value instanceof HttpServletResponse) {
75 response = (HttpServletResponse) value;
76 } else {
77 if (MgnlContext.isWebContext()) {
78 response = MgnlContext.getWebContext().getResponse();
79 } else {
80 return false;
81 }
82 }
83
84 // strip the encoding off of the content type:
85 final String contentType = StringUtils.substringBefore(response.getContentType(), ";");
86 if (contentType == null) {
87 log.warn("No content type set on the response, can't vote.");
88 return false;
89 }
90 if (allowed.size() > 0 && !allowed.contains(contentType)) {
91 return false;
92 }
93 if (rejected.size() > 0 && rejected.contains(contentType)) {
94 return false;
95 }
96 return true;
97 }
98 }