1 //========================================================================
2 //Copyright 2004-2008 Mort Bay Consulting Pty. Ltd.
3 //------------------------------------------------------------------------
4 //Licensed under the Apache License, Version 2.0 (the "License");
5 //you may not use this file except in compliance with the License.
6 //You may obtain a copy of the License at
7 //http://www.apache.org/licenses/LICENSE-2.0
8 //Unless required by applicable law or agreed to in writing, software
9 //distributed under the License is distributed on an "AS IS" BASIS,
10 //WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
11 //See the License for the specific language governing permissions and
12 //limitations under the License.
13 //========================================================================
14
15 package org.mortbay.servlet.jetty;
16
17 import java.io.IOException;
18
19 import javax.servlet.http.HttpServletRequest;
20 import javax.servlet.http.HttpServletResponse;
21
22 import org.mortbay.jetty.HttpConnection;
23 import org.mortbay.servlet.GzipFilter;
24
25 /* ------------------------------------------------------------ */
26 /** Includable GZip Filter.
27 * This extension to the {@link GzipFilter} that uses Jetty APIs to allow
28 * headers to be set during calls to
29 * {@link javax.servlet.RequestDispatcher#include(javax.servlet.ServletRequest, javax.servlet.ServletResponse)}.
30 * This allows the gzip filter to function correct during includes and to make a decision to gzip or not
31 * at the time the buffer fills and on the basis of all response headers.
32 *
33 * @author gregw
34 *
35 */
36 public class IncludableGzipFilter extends GzipFilter
37 {
38
39 protected GZIPResponseWrapper newGZIPResponseWrapper(HttpServletRequest request, HttpServletResponse response)
40 {
41 return new IncludableResponseWrapper(request,response);
42 }
43
44 public class IncludableResponseWrapper extends GzipFilter.GZIPResponseWrapper
45 {
46 public IncludableResponseWrapper(HttpServletRequest request, HttpServletResponse response)
47 {
48 super(request,response);
49 }
50
51 protected GzipStream newGzipStream(HttpServletRequest request,HttpServletResponse response,long contentLength,int bufferSize, int minGzipSize) throws IOException
52 {
53 return new IncludableGzipStream(request,response,contentLength,bufferSize,minGzipSize);
54 }
55 }
56
57 public class IncludableGzipStream extends GzipFilter.GzipStream
58 {
59 public IncludableGzipStream(HttpServletRequest request, HttpServletResponse response, long contentLength, int bufferSize, int minGzipSize)
60 throws IOException
61 {
62 super(request,response,contentLength,bufferSize,minGzipSize);
63 }
64
65 protected boolean setContentEncodingGzip()
66 {
67 HttpConnection connection = HttpConnection.getCurrentConnection();
68 connection.getResponseFields().put("Content-Encoding", "gzip");
69 return true;
70 }
71
72 }
73
74 }