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    1   /*
    2    * $Id: RequestUtils.java 471717 2006-11-06 12:50:18Z husted $
    3    *
    4    * Licensed to the Apache Software Foundation (ASF) under one
    5    * or more contributor license agreements.  See the NOTICE file
    6    * distributed with this work for additional information
    7    * regarding copyright ownership.  The ASF licenses this file
    8    * to you under the Apache License, Version 2.0 (the
    9    * "License"); you may not use this file except in compliance
    10   * with the License.  You may obtain a copy of the License at
    11   *
    12   *  http://www.apache.org/licenses/LICENSE-2.0
    13   *
    14   * Unless required by applicable law or agreed to in writing,
    15   * software distributed under the License is distributed on an
    16   * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
    17   * KIND, either express or implied.  See the License for the
    18   * specific language governing permissions and limitations
    19   * under the License.
    20   */
    21  package org.apache.struts2;
    22
    23  import javax.servlet.http.HttpServletRequest;
    24
    25
    26  /***
    27   * Request handling utility class.
    28   */
    29  public class RequestUtils {
    30
    31      /***
    32       * Retrieves the current request servlet path.
    33       * Deals with differences between servlet specs (2.2 vs 2.3+)
    34       *
    35       * @param request the request
    36       * @return the servlet path
    37       */
    38      public static String getServletPath(HttpServletRequest request) {
    39          String servletPath = request.getServletPath();
    40
    41          if (null != servletPath && !"".equals(servletPath)) {
    42              return servletPath;
    43          }
    44
    45          String requestUri = request.getRequestURI();
    46          int startIndex = request.getContextPath().equals("") ? 0 : request.getContextPath().length();
    47          int endIndex = request.getPathInfo() == null ? requestUri.length() : requestUri.lastIndexOf(request.getPathInfo());
    48
    49          if (startIndex > endIndex) { // this should not happen
    50              endIndex = startIndex;
    51          }
    52
    53          return requestUri.substring(startIndex, endIndex);
    54      }
    55
    56  }