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.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
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 }