1 /**
2 * This file Copyright (c) 2010-2011 Magnolia International
3 * Ltd. (http://www.magnolia-cms.com). All rights reserved.
4 *
5 *
6 * This file is dual-licensed under both the Magnolia
7 * Network Agreement and the GNU General Public License.
8 * You may elect to use one or the other of these licenses.
9 *
10 * This file is distributed in the hope that it will be
11 * useful, but AS-IS and WITHOUT ANY WARRANTY; without even the
12 * implied warranty of MERCHANTABILITY or FITNESS FOR A
13 * PARTICULAR PURPOSE, TITLE, or NONINFRINGEMENT.
14 * Redistribution, except as permitted by whichever of the GPL
15 * or MNA you select, is prohibited.
16 *
17 * 1. For the GPL license (GPL), you can redistribute and/or
18 * modify this file under the terms of the GNU General
19 * Public License, Version 3, as published by the Free Software
20 * Foundation. You should have received a copy of the GNU
21 * General Public License, Version 3 along with this program;
22 * if not, write to the Free Software Foundation, Inc., 51
23 * Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
24 *
25 * 2. For the Magnolia Network Agreement (MNA), this file
26 * and the accompanying materials are made available under the
27 * terms of the MNA which accompanies this distribution, and
28 * is available at http://www.magnolia-cms.com/mna.html
29 *
30 * Any modifications to this file must keep this entire header
31 * intact.
32 *
33 */
34 package info.magnolia.module.cache.filter;
35
36 import info.magnolia.module.cache.util.GZipUtil;
37 import org.apache.commons.collections.MultiMap;
38
39 import javax.servlet.FilterChain;
40 import javax.servlet.http.HttpServletRequest;
41 import javax.servlet.http.HttpServletResponse;
42 import java.io.IOException;
43 import java.util.Collection;
44
45
46 /**
47 * Cache entry keeping the content in memory. Stores a gzipped and non-gzipped version.
48 * @author pbaerfuss
49 * @version $Id$
50 *
51 */
52 public class InMemoryCachedEntry extends ContentCachedEntry {
53
54 private final byte[] gzippedContent;
55 private final byte[] plainContent;
56
57 public InMemoryCachedEntry(byte[] out, String contentType, String characterEncoding, int statusCode, MultiMap headers, long modificationDate, String originalUrl, int timeToLiveInSeconds) throws IOException {
58 super(contentType, characterEncoding, statusCode, headers, modificationDate, originalUrl, timeToLiveInSeconds);
59 // content which is actually of a compressed type must stay that way
60 if (GZipUtil.isGZipped(out)) {
61 this.gzippedContent = out;
62 boolean isGzippedResponse = headers.containsKey("Content-Encoding") && ((Collection)headers.get("Content-Encoding")).contains("gzip");
63 if(isGzippedResponse){
64 this.plainContent = GZipUtil.ungzip(out);
65 }
66 // in case of serving a gzip file (gif for instance)
67 else{
68 this.plainContent = null;
69 }
70 } else {
71 this.gzippedContent = GZipUtil.gzip(out);
72 this.plainContent = out;
73 }
74 }
75
76 @Override
77 protected boolean canServeGzipContent() {
78 return true;
79 }
80
81 @Override
82 protected void writeContent(HttpServletRequest request, HttpServletResponse response, FilterChain chain, boolean acceptsGzipEncoding) throws IOException {
83 final byte[] body;
84 if (acceptsGzipEncoding || getPlainContent() == null) {
85 body = getGzippedContent();
86 } else {
87 body = getPlainContent();
88 }
89
90 response.setContentLength(body.length);
91 response.getOutputStream().write(body);
92 }
93
94
95 public byte[] getPlainContent() {
96 return plainContent;
97 }
98
99 public byte[] getGzippedContent() {
100 return gzippedContent;
101 }
102
103 }