001
014
015 package com.liferay.portal.servlet.filters.i18n;
016
017 import com.liferay.portal.kernel.language.LanguageUtil;
018 import com.liferay.portal.kernel.log.Log;
019 import com.liferay.portal.kernel.log.LogFactoryUtil;
020 import com.liferay.portal.kernel.servlet.HttpMethods;
021 import com.liferay.portal.kernel.util.CookieKeys;
022 import com.liferay.portal.kernel.util.LocaleUtil;
023 import com.liferay.portal.kernel.util.StringPool;
024 import com.liferay.portal.kernel.util.StringUtil;
025 import com.liferay.portal.kernel.util.Validator;
026 import com.liferay.portal.model.Group;
027 import com.liferay.portal.model.LayoutSet;
028 import com.liferay.portal.model.User;
029 import com.liferay.portal.servlet.filters.BasePortalFilter;
030 import com.liferay.portal.util.PortalUtil;
031 import com.liferay.portal.util.PropsValues;
032 import com.liferay.portal.util.WebKeys;
033
034 import java.util.Collections;
035 import java.util.HashSet;
036 import java.util.Locale;
037 import java.util.Set;
038
039 import javax.servlet.FilterChain;
040 import javax.servlet.http.HttpServletRequest;
041 import javax.servlet.http.HttpServletResponse;
042 import javax.servlet.http.HttpSession;
043
044 import org.apache.struts.Globals;
045
046
049 public class I18nFilter extends BasePortalFilter {
050
051 public static final String SKIP_FILTER =
052 I18nFilter.class.getName() + "SKIP_FILTER";
053
054 public static Set<String> getLanguageIds() {
055 return _languageIds;
056 }
057
058 public static void setLanguageIds(Set<String> languageIds) {
059 _languageIds = new HashSet<String>();
060
061 for (String languageId : languageIds) {
062 languageId = languageId.substring(1);
063
064 _languageIds.add(languageId);
065 }
066
067 _languageIds = Collections.unmodifiableSet(_languageIds);
068 }
069
070 @Override
071 public boolean isFilterEnabled(
072 HttpServletRequest request, HttpServletResponse response) {
073
074 if (!isAlreadyFiltered(request) && !isForwardedByI18nServlet(request)) {
075 return true;
076 }
077 else {
078 return false;
079 }
080 }
081
082 protected String getRedirect(HttpServletRequest request) throws Exception {
083 if (PropsValues.LOCALE_PREPEND_FRIENDLY_URL_STYLE == 0) {
084 return null;
085 }
086
087 String method = request.getMethod();
088
089 if (method.equals(HttpMethods.POST)) {
090 return null;
091 }
092
093 String contextPath = PortalUtil.getPathContext();
094
095 String requestURI = request.getRequestURI();
096
097 if (Validator.isNotNull(contextPath) &&
098 requestURI.contains(contextPath)) {
099
100 requestURI = requestURI.substring(contextPath.length());
101 }
102
103 requestURI = StringUtil.replace(
104 requestURI, StringPool.DOUBLE_SLASH, StringPool.SLASH);
105
106 String i18nLanguageId = prependI18nLanguageId(
107 request, PropsValues.LOCALE_PREPEND_FRIENDLY_URL_STYLE);
108
109 if (i18nLanguageId == null) {
110 return null;
111 }
112
113 Locale locale = LocaleUtil.fromLanguageId(i18nLanguageId);
114
115 if (!LanguageUtil.isAvailableLocale(locale)) {
116 return null;
117 }
118
119 String i18nPathLanguageId = PortalUtil.getI18nPathLanguageId(
120 locale, i18nLanguageId);
121
122 String i18nPath = StringPool.SLASH.concat(i18nPathLanguageId);
123
124 if (requestURI.contains(i18nPath.concat(StringPool.SLASH))) {
125 return null;
126 }
127
128 String redirect = contextPath + i18nPath + requestURI;
129
130 LayoutSet layoutSet = (LayoutSet)request.getAttribute(
131 WebKeys.VIRTUAL_HOST_LAYOUT_SET);
132
133 if (layoutSet != null) {
134 int[] groupFriendlyURLIndex = PortalUtil.getGroupFriendlyURLIndex(
135 requestURI);
136
137 if (groupFriendlyURLIndex != null) {
138 int x = groupFriendlyURLIndex[0];
139 int y = groupFriendlyURLIndex[1];
140
141 String groupFriendlyURL = requestURI.substring(x, y);
142
143 Group group = layoutSet.getGroup();
144
145 if (groupFriendlyURL.equals(group.getFriendlyURL())) {
146 redirect = contextPath + i18nPath + requestURI.substring(y);
147 }
148 }
149 }
150
151 String queryString = request.getQueryString();
152
153 if (Validator.isNotNull(queryString)) {
154 redirect += StringPool.QUESTION + request.getQueryString();
155 }
156
157 return redirect;
158 }
159
160 protected boolean isAlreadyFiltered(HttpServletRequest request) {
161 if (request.getAttribute(SKIP_FILTER) != null) {
162 return true;
163 }
164 else {
165 return false;
166 }
167 }
168
169 protected boolean isForwardedByI18nServlet(HttpServletRequest request) {
170 if ((request.getAttribute(WebKeys.I18N_LANGUAGE_ID) != null) ||
171 (request.getAttribute(WebKeys.I18N_PATH) != null)) {
172
173 return true;
174 }
175 else {
176 return false;
177 }
178 }
179
180 protected String prependI18nLanguageId(
181 HttpServletRequest request, int prependFriendlyUrlStyle) {
182
183 String userLanguageId = null;
184
185 User user = (User)request.getAttribute(WebKeys.USER);
186
187 if (user != null) {
188 userLanguageId = user.getLanguageId();
189 }
190
191 String guestLanguageId = userLanguageId;
192
193 if (Validator.isNull(guestLanguageId)) {
194 guestLanguageId = CookieKeys.getCookie(
195 request, CookieKeys.GUEST_LANGUAGE_ID, false);
196 }
197
198 String defaultLanguageId = LocaleUtil.toLanguageId(
199 LocaleUtil.getDefault());
200
201 if (Validator.isNull(guestLanguageId)) {
202 guestLanguageId = defaultLanguageId;
203 }
204
205 if (prependFriendlyUrlStyle == 1) {
206 if (!defaultLanguageId.equals(guestLanguageId)) {
207 return guestLanguageId;
208 }
209 else {
210 return null;
211 }
212 }
213 else if (prependFriendlyUrlStyle == 2) {
214 return LocaleUtil.toLanguageId(PortalUtil.getLocale(request));
215 }
216 else if (prependFriendlyUrlStyle == 3) {
217 Locale locale = LocaleUtil.getDefault();
218
219 if (user != null) {
220 locale = user.getLocale();
221 }
222
223 HttpSession session = request.getSession();
224
225 session.setAttribute(Globals.LOCALE_KEY, locale);
226
227 return null;
228 }
229
230 return null;
231 }
232
233 @Override
234 protected void processFilter(
235 HttpServletRequest request, HttpServletResponse response,
236 FilterChain filterChain)
237 throws Exception {
238
239 request.setAttribute(SKIP_FILTER, Boolean.TRUE);
240
241 String redirect = getRedirect(request);
242
243 if (redirect == null) {
244 processFilter(I18nFilter.class, request, response, filterChain);
245
246 return;
247 }
248
249 if (_log.isDebugEnabled()) {
250 _log.debug("Redirect " + redirect);
251 }
252
253 response.sendRedirect(redirect);
254 }
255
256 private static Log _log = LogFactoryUtil.getLog(I18nFilter.class);
257
258 private static Set<String> _languageIds;
259
260 }