1   /**
2    * Copyright (c) 2000-2009 Liferay, Inc. All rights reserved.
3    *
4    * Permission is hereby granted, free of charge, to any person obtaining a copy
5    * of this software and associated documentation files (the "Software"), to deal
6    * in the Software without restriction, including without limitation the rights
7    * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
8    * copies of the Software, and to permit persons to whom the Software is
9    * furnished to do so, subject to the following conditions:
10   *
11   * The above copyright notice and this permission notice shall be included in
12   * all copies or substantial portions 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.upload;
24  
25  import java.io.IOException;
26  
27  import javax.servlet.ServletInputStream;
28  import javax.servlet.http.HttpServletRequest;
29  import javax.servlet.http.HttpServletRequestWrapper;
30  
31  /**
32   * <a href="LiferayServletRequest.java.html"><b><i>View Source</i></b></a>
33   *
34   * @author Brian Myunghun Kim
35   * @author Brian Wing Shun Chan
36   *
37   */
38  public class LiferayServletRequest extends HttpServletRequestWrapper {
39  
40      public LiferayServletRequest(HttpServletRequest request) {
41          super(request);
42  
43          _request = request;
44      }
45  
46      public ServletInputStream getInputStream() throws IOException {
47          if (_lis == null) {
48              _lis = new LiferayInputStream(_request);
49  
50              return _lis;
51          }
52          else {
53  
54              // Return the cached input stream the second time the user requests
55              // the input stream, otherwise, it will return an empty input stream
56              // because it has already been parsed
57  
58              return _lis.getCachedInputStream();
59          }
60      }
61  
62      private HttpServletRequest _request;
63      private LiferayInputStream _lis = null;
64  
65  }