| ThemePreviewFilter.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 /**
24 * The contents of this file are subject to the terms of the Common Development
25 * and Distribution License (the License). You may not use this file except in
26 * compliance with the License.
27 *
28 * You can obtain a copy of the License at http://www.sun.com/cddl/cddl.html and
29 * legal/CDDLv1.0.txt. See the License for the specific language governing
30 * permission and limitations under the License.
31 *
32 * When distributing Covered Code, include this CDDL Header Notice in each file
33 * and include the License file at legal/CDDLv1.0.txt.
34 *
35 * If applicable, add the following below the CDDL Header, with the fields
36 * enclosed by brackets [] replaced by your own identifying information:
37 * "Portions Copyrighted [year] [name of copyright owner]"
38 *
39 * Copyright 2009 Sun Microsystems Inc. All rights reserved.
40 */
41
42 package com.liferay.portal.servlet.filters.theme;
43
44 import com.liferay.portal.kernel.servlet.StringServletResponse;
45 import com.liferay.portal.kernel.util.ParamUtil;
46 import com.liferay.portal.servlet.filters.BasePortalFilter;
47 import com.liferay.portal.servlet.filters.strip.StripFilter;
48 import com.liferay.portal.theme.ThemeDisplay;
49 import com.liferay.portal.util.WebKeys;
50 import com.liferay.util.servlet.ServletResponseUtil;
51
52 import java.util.regex.Matcher;
53 import java.util.regex.Pattern;
54
55 import javax.servlet.FilterChain;
56 import javax.servlet.http.HttpServletRequest;
57 import javax.servlet.http.HttpServletResponse;
58
59 /**
60 * <a href="ThemePreviewFilter.java.html"><b><i>View Source</i></b></a>
61 *
62 * @author Ganesh Ram
63 */
64 public class ThemePreviewFilter extends BasePortalFilter {
65
66 protected String getContent(HttpServletRequest request, String content) {
67 ThemeDisplay themeDisplay = (ThemeDisplay)request.getAttribute(
68 WebKeys.THEME_DISPLAY);
69
70 Pattern cssPattern = Pattern.compile(
71 themeDisplay.getPathThemeCss());
72
73 Matcher cssMatcher = cssPattern.matcher(content);
74
75 content = cssMatcher.replaceAll("css");
76
77 Pattern imagePattern = Pattern.compile(
78 themeDisplay.getPathThemeImages());
79
80 Matcher imageMatcher = imagePattern.matcher(content);
81
82 content = imageMatcher.replaceAll("images");
83
84 return content;
85 }
86
87 protected boolean isThemePreview(HttpServletRequest request) {
88 if (ParamUtil.getBoolean(request, _THEME_PREVIEW)) {
89 return true;
90 }
91 else {
92 return false;
93 }
94 }
95
96 protected void processFilter(
97 HttpServletRequest request, HttpServletResponse response,
98 FilterChain filterChain)
99 throws Exception {
100
101 if (isThemePreview(request)) {
102 request.setAttribute(StripFilter.SKIP_FILTER, Boolean.TRUE);
103
104 StringServletResponse stringServerResponse =
105 new StringServletResponse(response);
106
107 processFilter(
108 ThemePreviewFilter.class, request, stringServerResponse,
109 filterChain);
110
111 String content = getContent(
112 request, stringServerResponse.getString());
113
114 ServletResponseUtil.write(response, content);
115 }
116 else {
117 processFilter(
118 ThemePreviewFilter.class, request, response, filterChain);
119 }
120 }
121
122 private static final String _THEME_PREVIEW = "themePreview";
123
124 }