1
22
23
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.io.IOException;
53
54 import java.util.regex.Matcher;
55 import java.util.regex.Pattern;
56
57 import javax.servlet.FilterChain;
58 import javax.servlet.ServletException;
59 import javax.servlet.http.HttpServletRequest;
60 import javax.servlet.http.HttpServletResponse;
61
62
68 public class ThemePreviewFilter extends BasePortalFilter {
69
70 protected String getContent(HttpServletRequest request, String content) {
71 ThemeDisplay themeDisplay = (ThemeDisplay)request.getAttribute(
72 WebKeys.THEME_DISPLAY);
73
74 Pattern cssPattern = Pattern.compile(
75 themeDisplay.getPathThemeCss());
76
77 Matcher cssMatcher = cssPattern.matcher(content);
78
79 content = cssMatcher.replaceAll("css");
80
81 Pattern imagePattern = Pattern.compile(
82 themeDisplay.getPathThemeImages());
83
84 Matcher imageMatcher = imagePattern.matcher(content);
85
86 content = imageMatcher.replaceAll("images");
87
88 return content;
89 }
90
91 protected boolean isThemePreview(HttpServletRequest request) {
92 if (ParamUtil.getBoolean(request, _THEME_PREVIEW)) {
93 return true;
94 }
95 else {
96 return false;
97 }
98 }
99
100 protected void processFilter(
101 HttpServletRequest request, HttpServletResponse response,
102 FilterChain filterChain)
103 throws IOException, ServletException {
104
105 if (isThemePreview(request)) {
106 request.setAttribute(StripFilter.SKIP_FILTER, Boolean.TRUE);
107
108 StringServletResponse stringServerResponse =
109 new StringServletResponse(response);
110
111 processFilter(
112 ThemePreviewFilter.class, request, stringServerResponse,
113 filterChain);
114
115 String content = getContent(
116 request, stringServerResponse.getString());
117
118 ServletResponseUtil.write(response, content);
119 }
120 else {
121 processFilter(
122 ThemePreviewFilter.class, request, response, filterChain);
123 }
124 }
125
126 private static final String _THEME_PREVIEW = "themePreview";
127
128 }