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annotate src/org/eclipse/jetty/server/HttpOutput.java @ 983:23ec25435b8c

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simplify AbstractGenerator
author Franklin Schmidt <fschmidt@gmail.com>
date Sun, 16 Oct 2016 22:58:41 -0600
parents dbecd7faa1f5
children
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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.HttpGenerator;
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27 import org.eclipse.jetty.io.Buffer;
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28 import org.eclipse.jetty.io.ByteArrayBuffer;
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29 import org.eclipse.jetty.io.EofException;
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30 import org.eclipse.jetty.util.ByteArrayOutputStream2;
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31
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32 /** Output.
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33 *
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34 * <p>
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35 * Implements {@link javax.servlet.ServletOutputStream} from the <code>javax.servlet</code> package.
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36 * </p>
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37 * A {@link ServletOutputStream} implementation that writes content
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38 * to a {@link HttpGenerator}. The class is designed to be reused
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39 * and can be reopened after a close.
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40 */
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41 public class HttpOutput extends ServletOutputStream
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42 {
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43 protected final AbstractHttpConnection _connection;
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44 protected final HttpGenerator _generator;
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45 private boolean _closed;
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46 private ByteArrayBuffer _onebyte;
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47
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48 // These are held here for reuse by Writer
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49 String _characterEncoding;
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50 Writer _converter;
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51 char[] _chars;
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52 ByteArrayOutputStream2 _bytes;
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53
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54 /* ------------------------------------------------------------ */
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55 public HttpOutput(AbstractHttpConnection connection)
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56 {
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57 _connection = connection;
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58 _generator = connection._generator;
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59 }
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60
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61 /* ------------------------------------------------------------ */
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62 public int getMaxIdleTime()
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63 {
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64 return _connection.getMaxIdleTime();
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65 }
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66
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67 /* ------------------------------------------------------------ */
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68 public boolean isWritten()
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69 {
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70 return _generator.getContentWritten()>0;
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71 }
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72
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73 /* ------------------------------------------------------------ */
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74 /*
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75 * @see java.io.OutputStream#close()
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76 */
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77 @Override
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78 public void close() throws IOException
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79 {
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80 _closed=true;
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81 }
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82
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83 /* ------------------------------------------------------------ */
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84 public boolean isClosed()
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85 {
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86 return _closed;
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87 }
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88
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89 /* ------------------------------------------------------------ */
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90 public void reopen()
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91 {
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92 _closed=false;
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93 }
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94
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95 /* ------------------------------------------------------------ */
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96 @Override
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97 public void flush() throws IOException
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98 {
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99 _generator.flush(getMaxIdleTime());
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100 }
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101
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102 /* ------------------------------------------------------------ */
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103 @Override
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104 public void write(byte[] b, int off, int len) throws IOException
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105 {
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106 write(new ByteArrayBuffer(b,off,len));
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107 }
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108
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109 /* ------------------------------------------------------------ */
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110 /*
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111 * @see java.io.OutputStream#write(byte[])
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112 */
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113 @Override
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114 public void write(byte[] b) throws IOException
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115 {
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116 write(new ByteArrayBuffer(b));
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117 }
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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 * @see java.io.OutputStream#write(int)
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123 */
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124 @Override
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125 public void write(int b) throws IOException
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126 {
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127 if (_onebyte==null)
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128 _onebyte=new ByteArrayBuffer(1);
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129 else
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130 _onebyte.clear();
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131 _onebyte.put((byte)b);
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132 write(_onebyte);
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133 }
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134
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135 /* ------------------------------------------------------------ */
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136 private void write(Buffer buffer) throws IOException
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137 {
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138 if (_closed)
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139 throw new IOException("Closed");
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140 if (!_generator.isOpen())
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141 throw new EofException();
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142
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143 // Block until we can add _content.
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144 while (_generator.isBufferFull())
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145 {
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146 _generator.blockForOutput(getMaxIdleTime());
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147 if (_closed)
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148 throw new IOException("Closed");
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149 if (!_generator.isOpen())
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150 throw new EofException();
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151 }
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152
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153 // Add the _content
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154 _generator.addContent(buffer, HttpGenerator.MORE);
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155
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156 // Have to flush and complete headers?
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157
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158 if (_generator.isAllContentWritten())
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159 {
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160 flush();
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161 close();
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162 }
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163 else if (_generator.isBufferFull())
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164 _connection.commitResponse(HttpGenerator.MORE);
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165
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166 // Block until our buffer is free
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167 while (buffer.length() > 0 && _generator.isOpen())
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168 {
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169 _generator.blockForOutput(getMaxIdleTime());
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170 }
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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 * @see javax.servlet.ServletOutputStream#print(java.lang.String)
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176 */
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177 @Override
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178 public void print(String s) throws IOException
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179 {
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180 write(s.getBytes());
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181 }
802
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182 }