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annotate src/org/eclipse/jetty/server/HttpOutput.java @ 840:0f53601ea489

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author Franklin Schmidt <fschmidt@gmail.com>
date Mon, 19 Sep 2016 14:20:18 -0600
parents 3428c60d7cfc
children 5ee36654b383
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1 //
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2 // ========================================================================
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3 // Copyright (c) 1995-2014 Mort Bay Consulting Pty. Ltd.
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4 // ------------------------------------------------------------------------
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5 // All rights reserved. This program and the accompanying materials
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6 // are made available under the terms of the Eclipse Public License v1.0
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7 // and Apache License v2.0 which accompanies this distribution.
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8 //
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9 // The Eclipse Public License is available at
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10 // http://www.eclipse.org/legal/epl-v10.html
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11 //
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12 // The Apache License v2.0 is available at
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13 // http://www.opensource.org/licenses/apache2.0.php
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14 //
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15 // You may elect to redistribute this code under either of these licenses.
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16 // ========================================================================
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17 //
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18
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19 package org.eclipse.jetty.server;
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20
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21 import java.io.IOException;
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22 import java.io.Writer;
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23
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24 import javax.servlet.ServletOutputStream;
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25
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26 import org.eclipse.jetty.http.AbstractGenerator;
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27 import org.eclipse.jetty.http.Generator;
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28 import org.eclipse.jetty.io.Buffer;
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29 import org.eclipse.jetty.io.ByteArrayBuffer;
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30 import org.eclipse.jetty.io.EofException;
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31 import org.eclipse.jetty.util.ByteArrayOutputStream2;
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32
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33 /** Output.
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34 *
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35 * <p>
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36 * Implements {@link javax.servlet.ServletOutputStream} from the <code>javax.servlet</code> package.
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37 * </p>
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38 * A {@link ServletOutputStream} implementation that writes content
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39 * to a {@link AbstractGenerator}. The class is designed to be reused
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40 * and can be reopened after a close.
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41 */
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42 public class HttpOutput extends ServletOutputStream
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43 {
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44 protected final AbstractHttpConnection _connection;
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45 protected final AbstractGenerator _generator;
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46 private boolean _closed;
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47 private ByteArrayBuffer _onebyte;
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48
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49 // These are held here for reuse by Writer
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50 String _characterEncoding;
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51 Writer _converter;
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52 char[] _chars;
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53 ByteArrayOutputStream2 _bytes;
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54
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55 /* ------------------------------------------------------------ */
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56 public HttpOutput(AbstractHttpConnection connection)
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57 {
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58 _connection=connection;
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59 _generator=(AbstractGenerator)connection.getGenerator();
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60 }
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61
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62 /* ------------------------------------------------------------ */
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63 public int getMaxIdleTime()
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64 {
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65 return _connection.getMaxIdleTime();
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66 }
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67
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68 /* ------------------------------------------------------------ */
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69 public boolean isWritten()
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70 {
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71 return _generator.getContentWritten()>0;
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72 }
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73
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74 /* ------------------------------------------------------------ */
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75 /*
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76 * @see java.io.OutputStream#close()
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77 */
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78 @Override
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79 public void close() throws IOException
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80 {
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81 _closed=true;
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82 }
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83
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84 /* ------------------------------------------------------------ */
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85 public boolean isClosed()
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86 {
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87 return _closed;
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88 }
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89
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90 /* ------------------------------------------------------------ */
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91 public void reopen()
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92 {
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93 _closed=false;
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94 }
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95
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96 /* ------------------------------------------------------------ */
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97 @Override
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98 public void flush() throws IOException
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99 {
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100 _generator.flush(getMaxIdleTime());
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101 }
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102
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103 /* ------------------------------------------------------------ */
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104 @Override
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105 public void write(byte[] b, int off, int len) throws IOException
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106 {
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107 write(new ByteArrayBuffer(b,off,len));
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108 }
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109
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110 /* ------------------------------------------------------------ */
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111 /*
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112 * @see java.io.OutputStream#write(byte[])
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113 */
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114 @Override
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115 public void write(byte[] b) throws IOException
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116 {
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117 write(new ByteArrayBuffer(b));
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118 }
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119
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120
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121 /* ------------------------------------------------------------ */
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122 /*
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123 * @see java.io.OutputStream#write(int)
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124 */
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125 @Override
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126 public void write(int b) throws IOException
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127 {
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128 if (_onebyte==null)
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129 _onebyte=new ByteArrayBuffer(1);
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130 else
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131 _onebyte.clear();
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132 _onebyte.put((byte)b);
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133 write(_onebyte);
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134 }
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135
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136 /* ------------------------------------------------------------ */
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137 private void write(Buffer buffer) throws IOException
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138 {
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139 if (_closed)
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140 throw new IOException("Closed");
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141 if (!_generator.isOpen())
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142 throw new EofException();
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143
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144 // Block until we can add _content.
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145 while (_generator.isBufferFull())
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146 {
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147 _generator.blockForOutput(getMaxIdleTime());
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148 if (_closed)
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149 throw new IOException("Closed");
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150 if (!_generator.isOpen())
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151 throw new EofException();
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152 }
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153
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154 // Add the _content
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155 _generator.addContent(buffer, Generator.MORE);
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156
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157 // Have to flush and complete headers?
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158
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159 if (_generator.isAllContentWritten())
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160 {
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161 flush();
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162 close();
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163 }
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164 else if (_generator.isBufferFull())
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165 _connection.commitResponse(Generator.MORE);
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166
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167 // Block until our buffer is free
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168 while (buffer.length() > 0 && _generator.isOpen())
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169 {
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170 _generator.blockForOutput(getMaxIdleTime());
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171 }
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172 }
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173
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174 /* ------------------------------------------------------------ */
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175 /*
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176 * @see javax.servlet.ServletOutputStream#print(java.lang.String)
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177 */
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178 @Override
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179 public void print(String s) throws IOException
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180 {
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181 write(s.getBytes());
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182 }
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183 }