1 //
2 // ========================================================================
3 // Copyright (c) 1995-2013 Mort Bay Consulting Pty. Ltd.
4 // ------------------------------------------------------------------------
5 // All rights reserved. This program and the accompanying materials
6 // are made available under the terms of the Eclipse Public License v1.0
7 // and Apache License v2.0 which accompanies this distribution.
8 //
9 // The Eclipse Public License is available at
10 // http://www.eclipse.org/legal/epl-v10.html
11 //
12 // The Apache License v2.0 is available at
13 // http://www.opensource.org/licenses/apache2.0.php
14 //
15 // You may elect to redistribute this code under either of these licenses.
16 // ========================================================================
17 //
18
19 package org.eclipse.jetty.server;
20
21 import java.io.IOException;
22 import java.io.Writer;
23
24 import javax.servlet.ServletOutputStream;
25
26 import org.eclipse.jetty.http.AbstractGenerator;
27 import org.eclipse.jetty.http.Generator;
28 import org.eclipse.jetty.io.Buffer;
29 import org.eclipse.jetty.io.ByteArrayBuffer;
30 import org.eclipse.jetty.io.EofException;
31 import org.eclipse.jetty.util.ByteArrayOutputStream2;
32
33 /** Output.
34 *
35 * <p>
36 * Implements {@link javax.servlet.ServletOutputStream} from the <code>javax.servlet</code> package.
37 * </p>
38 * A {@link ServletOutputStream} implementation that writes content
39 * to a {@link AbstractGenerator}. The class is designed to be reused
40 * and can be reopened after a close.
41 */
42 public class HttpOutput extends ServletOutputStream
43 {
44 protected final AbstractHttpConnection _connection;
45 protected final AbstractGenerator _generator;
46 private boolean _closed;
47 private ByteArrayBuffer _onebyte;
48
49 // These are held here for reuse by Writer
50 String _characterEncoding;
51 Writer _converter;
52 char[] _chars;
53 ByteArrayOutputStream2 _bytes;
54
55 /* ------------------------------------------------------------ */
56 public HttpOutput(AbstractHttpConnection connection)
57 {
58 _connection=connection;
59 _generator=(AbstractGenerator)connection.getGenerator();
60 }
61
62 /* ------------------------------------------------------------ */
63 public int getMaxIdleTime()
64 {
65 return _connection.getMaxIdleTime();
66 }
67
68 /* ------------------------------------------------------------ */
69 public boolean isWritten()
70 {
71 return _generator.getContentWritten()>0;
72 }
73
74 /* ------------------------------------------------------------ */
75 /*
76 * @see java.io.OutputStream#close()
77 */
78 @Override
79 public void close() throws IOException
80 {
81 _closed=true;
82 }
83
84 /* ------------------------------------------------------------ */
85 public boolean isClosed()
86 {
87 return _closed;
88 }
89
90 /* ------------------------------------------------------------ */
91 public void reopen()
92 {
93 _closed=false;
94 }
95
96 /* ------------------------------------------------------------ */
97 @Override
98 public void flush() throws IOException
99 {
100 _generator.flush(getMaxIdleTime());
101 }
102
103 /* ------------------------------------------------------------ */
104 @Override
105 public void write(byte[] b, int off, int len) throws IOException
106 {
107 write(new ByteArrayBuffer(b,off,len));
108 }
109
110 /* ------------------------------------------------------------ */
111 /*
112 * @see java.io.OutputStream#write(byte[])
113 */
114 @Override
115 public void write(byte[] b) throws IOException
116 {
117 write(new ByteArrayBuffer(b));
118 }
119
120
121 /* ------------------------------------------------------------ */
122 /*
123 * @see java.io.OutputStream#write(int)
124 */
125 @Override
126 public void write(int b) throws IOException
127 {
128 if (_onebyte==null)
129 _onebyte=new ByteArrayBuffer(1);
130 else
131 _onebyte.clear();
132 _onebyte.put((byte)b);
133 write(_onebyte);
134 }
135
136 /* ------------------------------------------------------------ */
137 private void write(Buffer buffer) throws IOException
138 {
139 if (_closed)
140 throw new IOException("Closed");
141 if (!_generator.isOpen())
142 throw new EofException();
143
144 // Block until we can add _content.
145 while (_generator.isBufferFull())
146 {
147 _generator.blockForOutput(getMaxIdleTime());
148 if (_closed)
149 throw new IOException("Closed");
150 if (!_generator.isOpen())
151 throw new EofException();
152 }
153
154 // Add the _content
155 _generator.addContent(buffer, Generator.MORE);
156
157 // Have to flush and complete headers?
158
159 if (_generator.isAllContentWritten())
160 {
161 flush();
162 close();
163 }
164 else if (_generator.isBufferFull())
165 _connection.commitResponse(Generator.MORE);
166
167 // Block until our buffer is free
168 while (buffer.length() > 0 && _generator.isOpen())
169 {
170 _generator.blockForOutput(getMaxIdleTime());
171 }
172 }
173
174 /* ------------------------------------------------------------ */
175 /*
176 * @see javax.servlet.ServletOutputStream#print(java.lang.String)
177 */
178 @Override
179 public void print(String s) throws IOException
180 {
181 write(s.getBytes());
182 }
183 }