1   /**
2    * Copyright (c) 2000-2010 Liferay, Inc. All rights reserved.
3    *
4    * This library is free software; you can redistribute it and/or modify it under
5    * the terms of the GNU Lesser General Public License as published by the Free
6    * Software Foundation; either version 2.1 of the License, or (at your option)
7    * any later version.
8    *
9    * This library is distributed in the hope that it will be useful, but WITHOUT
10   * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
11   * FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
12   * details.
13   */
14  
15  package com.liferay.portal.servlet;
16  
17  import com.liferay.portal.kernel.language.LanguageUtil;
18  import com.liferay.portal.kernel.log.Log;
19  import com.liferay.portal.kernel.log.LogFactoryUtil;
20  import com.liferay.portal.kernel.util.ContentTypes;
21  import com.liferay.portal.kernel.util.LocaleUtil;
22  import com.liferay.portal.kernel.util.StringPool;
23  import com.liferay.portal.kernel.util.StringUtil;
24  import com.liferay.portal.kernel.util.Validator;
25  import com.liferay.util.servlet.ServletResponseUtil;
26  
27  import java.io.IOException;
28  
29  import java.util.Locale;
30  
31  import javax.servlet.http.HttpServlet;
32  import javax.servlet.http.HttpServletRequest;
33  import javax.servlet.http.HttpServletResponse;
34  
35  /**
36   * <a href="LanguageServlet.java.html"><b><i>View Source</i></b></a>
37   *
38   * @author Brian Wing Shun Chan
39   */
40  public class LanguageServlet extends HttpServlet {
41  
42      public void service(
43              HttpServletRequest request, HttpServletResponse response)
44          throws IOException {
45  
46          String path = request.getPathInfo();
47  
48          if (_log.isDebugEnabled()) {
49              _log.debug("Path " + path);
50          }
51  
52          if (Validator.isNotNull(path) && path.startsWith(StringPool.SLASH)) {
53              path = path.substring(1, path.length());
54          }
55  
56          String[] pathArray = StringUtil.split(path, StringPool.SLASH);
57  
58          if (pathArray.length == 0) {
59              _log.error("Language id is not specified");
60  
61              return;
62          }
63  
64          if (pathArray.length == 1) {
65              _log.error("Language key is not specified");
66  
67              return;
68          }
69  
70          Locale locale = LocaleUtil.fromLanguageId(pathArray[0]);
71          String key = pathArray[1];
72  
73          Object[] arguments = null;
74  
75          if (pathArray.length > 2) {
76              arguments = new Object[pathArray.length - 2];
77  
78              System.arraycopy(pathArray, 2, arguments, 0, arguments.length);
79          }
80  
81          String value = key;
82  
83          try {
84              if ((arguments == null) || (arguments.length == 0)) {
85                  value = LanguageUtil.get(locale, key);
86              }
87              else {
88                  value = LanguageUtil.format(locale, key, arguments);
89              }
90          }
91          catch (Exception e) {
92              if (_log.isWarnEnabled()) {
93                  _log.warn(e, e);
94              }
95          }
96  
97          response.setContentType(ContentTypes.TEXT_PLAIN_UTF8);
98  
99          ServletResponseUtil.write(response, value.getBytes(StringPool.UTF8));
100     }
101 
102     private static Log _log = LogFactoryUtil.getLog(LanguageServlet.class);
103 
104 }