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1   /*
2    * $Id: RequestUtils.java 418521 2006-07-01 23:36:50Z mrdon $
3    *
4    * Copyright 2006 The Apache Software Foundation.
5    *
6    * Licensed under the Apache License, Version 2.0 (the "License");
7    * you may not use this file except in compliance with the License.
8    * You may obtain a copy of the License at
9    *
10   *      http://www.apache.org/licenses/LICENSE-2.0
11   *
12   * Unless required by applicable law or agreed to in writing, software
13   * distributed under the License is distributed on an "AS IS" BASIS,
14   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15   * See the License for the specific language governing permissions and
16   * limitations under the License.
17   */
18  package org.apache.struts2;
19  
20  import javax.servlet.http.HttpServletRequest;
21  
22  
23  /***
24   * Request handling utility class.
25   */
26  public class RequestUtils {
27  
28      /***
29       * Retrieves the current request servlet path.
30       * Deals with differences between servlet specs (2.2 vs 2.3+)
31       * 
32       * @param request the request
33       * @return the servlet path
34       */
35      public static String getServletPath(HttpServletRequest request) {
36          String servletPath = request.getServletPath();
37          
38          if (null != servletPath && !"".equals(servletPath)) {
39              return servletPath;
40          }
41          
42          String requestUri = request.getRequestURI();
43          int startIndex = request.getContextPath().equals("") ? 0 : request.getContextPath().length();
44          int endIndex = request.getPathInfo() == null ? requestUri.length() : requestUri.lastIndexOf(request.getPathInfo());
45          
46          if (startIndex > endIndex) { // this should not happen
47              endIndex = startIndex;
48          }
49          
50          return requestUri.substring(startIndex, endIndex);
51      }
52      
53  }