1 // ========================================================================
2 // Copyright (c) 2004-2009 Mort Bay Consulting Pty. Ltd.
3 // ------------------------------------------------------------------------
4 // All rights reserved. This program and the accompanying materials
5 // are made available under the terms of the Eclipse Public License v1.0
6 // and Apache License v2.0 which accompanies this distribution.
7 // The Eclipse Public License is available at
8 // http://www.eclipse.org/legal/epl-v10.html
9 // The Apache License v2.0 is available at
10 // http://www.opensource.org/licenses/apache2.0.php
11 // You may elect to redistribute this code under either of these licenses.
12 // ========================================================================
13
14 package org.eclipse.jetty.servlets;
15
16 import java.io.IOException;
17
18 import javax.servlet.http.HttpServletRequest;
19 import javax.servlet.http.HttpServletResponse;
20
21
22
23 /* ------------------------------------------------------------ */
24 /** Includable GZip Filter.
25 * This extension to the {@link GzipFilter} that uses Jetty features to allow
26 * headers to be set during calls to
27 * {@link javax.servlet.RequestDispatcher#include(javax.servlet.ServletRequest, javax.servlet.ServletResponse)}.
28 * This allows the gzip filter to function correct during includes and to make a decision to gzip or not
29 * at the time the buffer fills and on the basis of all response headers.
30 *
31 *
32 *
33 */
34 public class IncludableGzipFilter extends GzipFilter
35 {
36
37 protected GZIPResponseWrapper newGZIPResponseWrapper(HttpServletRequest request, HttpServletResponse response)
38 {
39 return new IncludableResponseWrapper(request,response);
40 }
41
42 public class IncludableResponseWrapper extends GzipFilter.GZIPResponseWrapper
43 {
44 public IncludableResponseWrapper(HttpServletRequest request, HttpServletResponse response)
45 {
46 super(request,response);
47 }
48
49 protected GzipStream newGzipStream(HttpServletRequest request,HttpServletResponse response,long contentLength,int bufferSize, int minGzipSize) throws IOException
50 {
51 return new IncludableGzipStream(request,response,contentLength,bufferSize,minGzipSize);
52 }
53 }
54
55 public class IncludableGzipStream extends GzipFilter.GzipStream
56 {
57 public IncludableGzipStream(HttpServletRequest request, HttpServletResponse response, long contentLength, int bufferSize, int minGzipSize)
58 throws IOException
59 {
60 super(request,response,contentLength,bufferSize,minGzipSize);
61 }
62
63 protected boolean setContentEncodingGzip()
64 {
65 if (_request.getAttribute("javax.servlet.include.request_uri")!=null)
66 _response.setHeader("org.eclipse.jetty.server.include.Content-Encoding", "gzip");
67 else
68 _response.setHeader("Content-Encoding", "gzip");
69
70 return _response.containsHeader("Content-Encoding");
71 }
72
73 }
74
75 }