1 /**
2 * This file Copyright (c) 2003-2018 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.context;
35
36 import java.io.IOException;
37 import java.io.PrintWriter;
38 import java.io.Writer;
39
40 import javax.servlet.ServletOutputStream;
41 import javax.servlet.http.HttpServletResponse;
42 import javax.servlet.http.HttpServletResponseWrapper;
43
44 /**
45 * Wraps an HttpServletResponse and redirects both outputs (getWriter() and getOutputStream())
46 * to the given Writer. (As per the ServletResponse javadoc, only one of those methods can be used)
47 *
48 * This might cause encoding issues, so use carefully. (not sure it makes any sense to allow the
49 * outputStream usage in our case, but oh well, ...)
50 * See the original JSPIncludeUtil for more discussion about encoding.
51 */
52 class WriterResponseWrapper extends HttpServletResponseWrapper {
53 private final Writer out;
54 private final PrintWriter pw;
55 private boolean writerWasUsed = false;
56 private boolean streamWasUsed = false;
57 private final ServletOutputStream sos = new ServletOutputStream() {
58 @Override
59 public void write(int b) throws IOException {
60 out.write(b);
61 }
62 };
63 private int status = SC_OK;
64
65 WriterResponseWrapper(HttpServletResponse response, Writer out) {
66 super(response);
67 this.out = out;
68 this.pw = new PrintWriter(out);
69 }
70
71 @Override
72 public PrintWriter getWriter() {
73 writerWasUsed = checkOutputState(streamWasUsed);
74 return pw;
75 }
76
77 @Override
78 public ServletOutputStream getOutputStream() {
79 streamWasUsed = checkOutputState(writerWasUsed);
80 return sos;
81 }
82
83 private boolean checkOutputState(boolean forbidden) {
84 if (forbidden) {
85 throw new IllegalStateException("According to the ServletResponse javadoc, either getWriter or getOutputStream may be called to write the body, not both.");
86 }
87 return true;
88 }
89
90
91 @Override
92 public void setStatus(int status) {
93 this.status = status;
94 }
95
96 public int getStatus() {
97 return status;
98 }
99 }