1   /**
2    * Copyright (c) 2000-2009 Liferay, Inc. All rights reserved.
3    *
4    *
5    *
6    *
7    * The contents of this file are subject to the terms of the Liferay Enterprise
8    * Subscription License ("License"). You may not use this file except in
9    * compliance with the License. You can obtain a copy of the License by
10   * contacting Liferay, Inc. See the License for the specific language governing
11   * permissions and limitations under the License, including but not limited to
12   * distribution rights 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  package com.liferay.portal.servlet.filters.language;
24  
25  import com.liferay.portal.kernel.language.LanguageUtil;
26  import com.liferay.portal.kernel.language.UnicodeLanguageUtil;
27  import com.liferay.portal.kernel.util.LocaleUtil;
28  import com.liferay.portal.kernel.util.StringPool;
29  import com.liferay.portal.servlet.filters.BasePortalFilter;
30  import com.liferay.util.servlet.filters.CacheResponse;
31  import com.liferay.util.servlet.filters.CacheResponseData;
32  import com.liferay.util.servlet.filters.CacheResponseUtil;
33  
34  import java.util.Locale;
35  import java.util.regex.Matcher;
36  import java.util.regex.Pattern;
37  
38  import javax.servlet.FilterChain;
39  import javax.servlet.http.HttpServletRequest;
40  import javax.servlet.http.HttpServletResponse;
41  
42  /**
43   * <a href="LanguageFilter.java.html"><b><i>View Source</i></b></a>
44   *
45   * @author Eduardo Lundgren
46   */
47  public class LanguageFilter extends BasePortalFilter {
48  
49      protected void processFilter(
50              HttpServletRequest request, HttpServletResponse response,
51              FilterChain filterChain)
52          throws Exception {
53  
54          CacheResponse cacheResponse = new CacheResponse(
55              response, StringPool.UTF8);
56  
57          processFilter(
58              LanguageFilter.class, request, cacheResponse, filterChain);
59  
60          byte[] bytes = translateResponse(
61              request, cacheResponse, cacheResponse.getData());
62  
63          CacheResponseData cacheResponseData = new CacheResponseData(
64              bytes, cacheResponse.getContentType(), cacheResponse.getHeaders());
65  
66          CacheResponseUtil.write(response, cacheResponseData);
67      }
68  
69      protected byte[] translateResponse(
70          HttpServletRequest request, HttpServletResponse response,
71          byte[] bytes) {
72  
73          String languageId = LanguageUtil.getLanguageId(request);
74          Locale locale = LocaleUtil.fromLanguageId(languageId);
75  
76          String content = new String(bytes);
77  
78          Matcher matcher = _pattern.matcher(content);
79  
80          while (matcher.find()) {
81              String match = matcher.group(0);
82              String key = matcher.group(1);
83  
84              StringBuffer sb = new StringBuffer();
85  
86              sb.append(StringPool.APOSTROPHE);
87              sb.append(UnicodeLanguageUtil.get(locale, key));
88              sb.append(StringPool.APOSTROPHE);
89  
90              content = content.replace(match, sb.toString());
91          }
92  
93          return content.getBytes();
94      }
95  
96      private static Pattern _pattern = Pattern.compile(
97          "Liferay\\.Language\\.get\\([\"']([^)]+)[\"']\\)");
98  
99  }