1   /**
2    * Copyright (c) 2000-2009 Liferay, Inc. All rights reserved.
3    *
4    * The contents of this file are subject to the terms of the Liferay Enterprise
5    * Subscription License ("License"). You may not use this file except in
6    * compliance with the License. You can obtain a copy of the License by
7    * contacting Liferay, Inc. See the License for the specific language governing
8    * permissions and limitations under the License, including but not limited to
9    * distribution rights of the Software.
10   *
11   * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
12   * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
13   * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
14   * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
15   * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
16   * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
17   * SOFTWARE.
18   */
19  
20  package com.liferay.portal.servlet.filters.gzip;
21  
22  import com.liferay.portal.kernel.util.StringPool;
23  
24  import java.io.IOException;
25  import java.io.OutputStreamWriter;
26  import java.io.PrintWriter;
27  
28  import javax.servlet.ServletOutputStream;
29  import javax.servlet.http.HttpServletResponse;
30  import javax.servlet.http.HttpServletResponseWrapper;
31  
32  /**
33   * <a href="GZipResponse.java.html"><b><i>View Source</i></b></a>
34   *
35   * @author Jayson Falkner
36   * @author Brian Wing Shun Chan
37   *
38   */
39  public class GZipResponse extends HttpServletResponseWrapper {
40  
41      public GZipResponse(HttpServletResponse response) {
42          super(response);
43  
44          _response = response;
45      }
46  
47      public void finishResponse() {
48          try {
49              if (_writer != null) {
50                  _writer.close();
51              }
52              else if (_stream != null) {
53                  _stream.close();
54              }
55          }
56          catch (IOException e) {
57          }
58      }
59  
60      public void flushBuffer() throws IOException {
61          if (_stream != null) {
62              _stream.flush();
63          }
64      }
65  
66      public ServletOutputStream getOutputStream() throws IOException {
67          if (_writer != null) {
68              throw new IllegalStateException();
69          }
70  
71          if (_stream == null) {
72              _stream = _createOutputStream();
73          }
74  
75          return _stream;
76      }
77  
78      public PrintWriter getWriter() throws IOException {
79          if (_writer != null) {
80              return _writer;
81          }
82  
83          if (_stream != null) {
84              throw new IllegalStateException();
85          }
86  
87          _stream = _createOutputStream();
88  
89          _writer = new PrintWriter(new OutputStreamWriter(
90              //_stream, _res.getCharacterEncoding()));
91              _stream, StringPool.UTF8));
92  
93          return _writer;
94      }
95  
96      private ServletOutputStream _createOutputStream() throws IOException {
97          return new GZipStream(_response);
98      }
99  
100     private HttpServletResponse _response = null;
101     private ServletOutputStream _stream = null;
102     private PrintWriter _writer = null;
103 
104 }