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annotate src/org/eclipse/jetty/http/gzip/CompressedResponseWrapper.java @ 971:f997df37cec1

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minor
author Franklin Schmidt <fschmidt@gmail.com>
date Fri, 14 Oct 2016 13:06:06 -0600
parents 3428c60d7cfc
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.http.gzip;
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20
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21 import java.io.IOException;
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22 import java.io.OutputStream;
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23 import java.io.OutputStreamWriter;
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24 import java.io.PrintWriter;
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25 import java.io.UnsupportedEncodingException;
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26 import java.util.Set;
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27
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28 import javax.servlet.ServletOutputStream;
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29 import javax.servlet.http.HttpServletRequest;
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30 import javax.servlet.http.HttpServletResponse;
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31 import javax.servlet.http.HttpServletResponseWrapper;
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32
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33 import org.eclipse.jetty.util.StringUtil;
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34
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35 /*------------------------------------------------------------ */
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36 /**
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37 */
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38 public abstract class CompressedResponseWrapper extends HttpServletResponseWrapper
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39 {
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40
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41 public static final int DEFAULT_BUFFER_SIZE = 8192;
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42 public static final int DEFAULT_MIN_COMPRESS_SIZE = 256;
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43
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44 private Set<String> _mimeTypes;
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45 private int _bufferSize=DEFAULT_BUFFER_SIZE;
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46 private int _minCompressSize=DEFAULT_MIN_COMPRESS_SIZE;
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47 protected HttpServletRequest _request;
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48
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49 private PrintWriter _writer;
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50 private AbstractCompressedStream _compressedStream;
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51 private String _etag;
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52 private long _contentLength=-1;
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53 private boolean _noCompression;
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54
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55 /* ------------------------------------------------------------ */
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56 public CompressedResponseWrapper(HttpServletRequest request, HttpServletResponse response)
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57 {
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58 super(response);
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59 _request = request;
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60 }
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61
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62
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63 /* ------------------------------------------------------------ */
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64 public long getContentLength()
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65 {
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66 return _contentLength;
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67 }
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68
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69 /* ------------------------------------------------------------ */
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70 public int getBufferSize()
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71 {
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72 return _bufferSize;
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73 }
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74
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75 /* ------------------------------------------------------------ */
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76 public int getMinCompressSize()
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77 {
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78 return _minCompressSize;
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79 }
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80
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81 /* ------------------------------------------------------------ */
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82 public String getETag()
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83 {
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84 return _etag;
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85 }
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86
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87 /* ------------------------------------------------------------ */
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88 public HttpServletRequest getRequest()
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89 {
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90 return _request;
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91 }
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92
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93 /* ------------------------------------------------------------ */
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94 /**
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95 * @see org.eclipse.jetty.http.gzip.CompressedResponseWrapper#setMimeTypes(java.util.Set)
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96 */
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97 public void setMimeTypes(Set<String> mimeTypes)
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98 {
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99 _mimeTypes = mimeTypes;
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100 }
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101
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102 /* ------------------------------------------------------------ */
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103 /**
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104 * @see org.eclipse.jetty.http.gzip.CompressedResponseWrapper#setBufferSize(int)
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105 */
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106 @Override
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107 public void setBufferSize(int bufferSize)
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108 {
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109 _bufferSize = bufferSize;
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110 if (_compressedStream!=null)
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111 _compressedStream.setBufferSize(bufferSize);
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112 }
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113
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114 /* ------------------------------------------------------------ */
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115 /**
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116 * @see org.eclipse.jetty.http.gzip.CompressedResponseWrapper#setMinCompressSize(int)
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117 */
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118 public void setMinCompressSize(int minCompressSize)
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119 {
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120 _minCompressSize = minCompressSize;
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121 }
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122
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123 /* ------------------------------------------------------------ */
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124 /**
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125 * @see org.eclipse.jetty.http.gzip.CompressedResponseWrapper#setContentType(java.lang.String)
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126 */
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127 @Override
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128 public void setContentType(String ct)
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129 {
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130 super.setContentType(ct);
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131
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132 if (!_noCompression)
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133 {
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134 if (ct!=null)
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135 {
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136 int colon=ct.indexOf(";");
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137 if (colon>0)
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138 ct=ct.substring(0,colon);
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139 }
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140
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141 if ((_compressedStream==null || _compressedStream.getOutputStream()==null) &&
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142 (_mimeTypes==null && ct!=null && ct.contains("gzip") ||
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143 _mimeTypes!=null && (ct==null||!_mimeTypes.contains(StringUtil.asciiToLowerCase(ct)))))
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144 {
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145 noCompression();
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146 }
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147 }
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148 }
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149
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150 /* ------------------------------------------------------------ */
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151 /**
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152 * @see org.eclipse.jetty.http.gzip.CompressedResponseWrapper#setStatus(int, java.lang.String)
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153 */
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154 @Override
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155 public void setStatus(int sc, String sm)
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156 {
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157 super.setStatus(sc,sm);
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158 if (sc<200 || sc==204 || sc==205 || sc>=300)
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159 noCompression();
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160 }
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161
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162 /* ------------------------------------------------------------ */
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163 /**
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164 * @see org.eclipse.jetty.http.gzip.CompressedResponseWrapper#setStatus(int)
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165 */
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166 @Override
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167 public void setStatus(int sc)
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168 {
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169 super.setStatus(sc);
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170 if (sc<200 || sc==204 || sc==205 || sc>=300)
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171 noCompression();
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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 org.eclipse.jetty.http.gzip.CompressedResponseWrapper#setContentLength(int)
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177 */
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178 @Override
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179 public void setContentLength(int length)
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180 {
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181 if (_noCompression)
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182 super.setContentLength(length);
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183 else
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184 setContentLength((long)length);
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185 }
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186
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187 /* ------------------------------------------------------------ */
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188 protected void setContentLength(long length)
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189 {
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190 _contentLength=length;
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191 if (_compressedStream!=null)
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192 _compressedStream.setContentLength();
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193 else if (_noCompression && _contentLength>=0)
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194 {
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195 HttpServletResponse response = (HttpServletResponse)getResponse();
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196 if(_contentLength<Integer.MAX_VALUE)
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197 {
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198 response.setContentLength((int)_contentLength);
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199 }
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200 else
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201 {
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202 response.setHeader("Content-Length", Long.toString(_contentLength));
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203 }
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204 }
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205 }
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206
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207 /* ------------------------------------------------------------ */
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208 /**
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209 * @see org.eclipse.jetty.http.gzip.CompressedResponseWrapper#addHeader(java.lang.String, java.lang.String)
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210 */
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211 @Override
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212 public void addHeader(String name, String value)
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213 {
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214 if ("content-length".equalsIgnoreCase(name))
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215 {
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216 _contentLength=Long.parseLong(value);
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217 if (_compressedStream!=null)
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218 _compressedStream.setContentLength();
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219 }
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220 else if ("content-type".equalsIgnoreCase(name))
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221 {
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222 setContentType(value);
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223 }
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224 else if ("content-encoding".equalsIgnoreCase(name))
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225 {
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226 super.addHeader(name,value);
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227 if (!isCommitted())
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228 {
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229 noCompression();
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230 }
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231 }
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232 else if ("etag".equalsIgnoreCase(name))
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233 _etag=value;
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234 else
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235 super.addHeader(name,value);
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236 }
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237
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238 /* ------------------------------------------------------------ */
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239 /**
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240 * @see org.eclipse.jetty.http.gzip.CompressedResponseWrapper#flushBuffer()
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241 */
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242 @Override
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243 public void flushBuffer() throws IOException
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244 {
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245 if (_writer!=null)
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246 _writer.flush();
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247 if (_compressedStream!=null)
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248 _compressedStream.flush();
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249 else
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250 getResponse().flushBuffer();
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251 }
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252
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253 /* ------------------------------------------------------------ */
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254 /**
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255 * @see org.eclipse.jetty.http.gzip.CompressedResponseWrapper#reset()
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256 */
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257 @Override
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258 public void reset()
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259 {
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260 super.reset();
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261 if (_compressedStream!=null)
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262 _compressedStream.resetBuffer();
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263 _writer=null;
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264 _compressedStream=null;
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265 _noCompression=false;
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266 _contentLength=-1;
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267 }
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268
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269 /* ------------------------------------------------------------ */
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270 /**
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271 * @see org.eclipse.jetty.http.gzip.CompressedResponseWrapper#resetBuffer()
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272 */
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273 @Override
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274 public void resetBuffer()
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275 {
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276 super.resetBuffer();
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277 if (_compressedStream!=null)
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278 _compressedStream.resetBuffer();
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279 _writer=null;
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280 _compressedStream=null;
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281 }
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282
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283 /* ------------------------------------------------------------ */
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284 /**
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285 * @see org.eclipse.jetty.http.gzip.CompressedResponseWrapper#sendError(int, java.lang.String)
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286 */
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287 @Override
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288 public void sendError(int sc, String msg) throws IOException
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289 {
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290 resetBuffer();
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291 super.sendError(sc,msg);
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292 }
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293
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294 /* ------------------------------------------------------------ */
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295 /**
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296 * @see org.eclipse.jetty.http.gzip.CompressedResponseWrapper#sendError(int)
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297 */
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298 @Override
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diff changeset
299 public void sendError(int sc) throws IOException
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300 {
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diff changeset
301 resetBuffer();
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diff changeset
302 super.sendError(sc);
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303 }
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304
3428c60d7cfc replace jetty jars with source
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parents:
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305 /* ------------------------------------------------------------ */
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306 /**
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307 * @see org.eclipse.jetty.http.gzip.CompressedResponseWrapper#sendRedirect(java.lang.String)
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diff changeset
308 */
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diff changeset
309 @Override
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diff changeset
310 public void sendRedirect(String location) throws IOException
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diff changeset
311 {
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diff changeset
312 resetBuffer();
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diff changeset
313 super.sendRedirect(location);
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314 }
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315
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parents:
diff changeset
316 /* ------------------------------------------------------------ */
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diff changeset
317 /**
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diff changeset
318 * @see org.eclipse.jetty.http.gzip.CompressedResponseWrapper#noCompression()
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diff changeset
319 */
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diff changeset
320 public void noCompression()
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diff changeset
321 {
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diff changeset
322 if (!_noCompression)
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diff changeset
323 setDeferredHeaders();
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324 _noCompression=true;
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diff changeset
325 if (_compressedStream!=null)
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diff changeset
326 {
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diff changeset
327 try
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diff changeset
328 {
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diff changeset
329 _compressedStream.doNotCompress(false);
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330 }
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diff changeset
331 catch (IOException e)
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diff changeset
332 {
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diff changeset
333 throw new IllegalStateException(e);
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diff changeset
334 }
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parents:
diff changeset
335 }
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parents:
diff changeset
336 }
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diff changeset
337
3428c60d7cfc replace jetty jars with source
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parents:
diff changeset
338 /* ------------------------------------------------------------ */
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339 /**
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340 * @see org.eclipse.jetty.http.gzip.CompressedResponseWrapper#finish()
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341 */
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342 public void finish() throws IOException
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343 {
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344 if (_writer!=null && !_compressedStream.isClosed())
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345 _writer.flush();
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346 if (_compressedStream!=null)
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347 _compressedStream.finish();
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348 else
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349 setDeferredHeaders();
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350 }
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351
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352 /* ------------------------------------------------------------ */
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353 private void setDeferredHeaders()
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354 {
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355 if (!isCommitted())
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356 {
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357 if (_contentLength>=0)
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358 {
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359 if (_contentLength < Integer.MAX_VALUE)
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360 super.setContentLength((int)_contentLength);
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361 else
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362 super.setHeader("Content-Length",Long.toString(_contentLength));
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363 }
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364 if(_etag!=null)
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365 super.setHeader("ETag",_etag);
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366 }
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367 }
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368
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369 /* ------------------------------------------------------------ */
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370 /**
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371 * @see org.eclipse.jetty.http.gzip.CompressedResponseWrapper#setHeader(java.lang.String, java.lang.String)
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372 */
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373 @Override
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374 public void setHeader(String name, String value)
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375 {
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376 if (_noCompression)
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377 super.setHeader(name,value);
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378 else if ("content-length".equalsIgnoreCase(name))
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379 {
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380 setContentLength(Long.parseLong(value));
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381 }
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382 else if ("content-type".equalsIgnoreCase(name))
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383 {
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384 setContentType(value);
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385 }
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386 else if ("content-encoding".equalsIgnoreCase(name))
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387 {
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388 super.setHeader(name,value);
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389 if (!isCommitted())
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390 {
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391 noCompression();
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392 }
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393 }
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394 else if ("etag".equalsIgnoreCase(name))
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395 _etag=value;
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396 else
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397 super.setHeader(name,value);
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398 }
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399
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400 /* ------------------------------------------------------------ */
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401 @Override
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402 public boolean containsHeader(String name)
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403 {
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404 if (!_noCompression && "etag".equalsIgnoreCase(name) && _etag!=null)
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405 return true;
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406 return super.containsHeader(name);
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407 }
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408
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409 /* ------------------------------------------------------------ */
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410 /**
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411 * @see org.eclipse.jetty.http.gzip.CompressedResponseWrapper#getOutputStream()
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412 */
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413 @Override
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414 public ServletOutputStream getOutputStream() throws IOException
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415 {
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416 if (_compressedStream==null)
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417 {
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418 if (getResponse().isCommitted() || _noCompression)
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419 return getResponse().getOutputStream();
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420
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421 _compressedStream=newCompressedStream(_request,(HttpServletResponse)getResponse());
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422 }
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423 else if (_writer!=null)
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424 throw new IllegalStateException("getWriter() called");
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425
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426 return _compressedStream;
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427 }
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428
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429 /* ------------------------------------------------------------ */
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430 /**
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431 * @see org.eclipse.jetty.http.gzip.CompressedResponseWrapper#getWriter()
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432 */
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433 @Override
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434 public PrintWriter getWriter() throws IOException
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435 {
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436 if (_writer==null)
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diff changeset
437 {
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438 if (_compressedStream!=null)
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439 throw new IllegalStateException("getOutputStream() called");
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440
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441 if (getResponse().isCommitted() || _noCompression)
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442 return getResponse().getWriter();
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443
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444 _compressedStream=newCompressedStream(_request,(HttpServletResponse)getResponse());
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445 _writer=newWriter(_compressedStream,getCharacterEncoding());
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446 }
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447 return _writer;
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448 }
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449
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450 /* ------------------------------------------------------------ */
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451 /**
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452 * @see org.eclipse.jetty.http.gzip.CompressedResponseWrapper#setIntHeader(java.lang.String, int)
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453 */
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454 @Override
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diff changeset
455 public void setIntHeader(String name, int value)
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456 {
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457 if ("content-length".equalsIgnoreCase(name))
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diff changeset
458 {
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diff changeset
459 _contentLength=value;
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diff changeset
460 if (_compressedStream!=null)
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diff changeset
461 _compressedStream.setContentLength();
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462 }
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diff changeset
463 else
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464 super.setIntHeader(name,value);
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diff changeset
465 }
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diff changeset
466
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467 /* ------------------------------------------------------------ */
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468 /**
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diff changeset
469 * Allows derived implementations to replace PrintWriter implementation.
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diff changeset
470 *
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diff changeset
471 * @param out the out
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diff changeset
472 * @param encoding the encoding
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diff changeset
473 * @return the prints the writer
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diff changeset
474 * @throws UnsupportedEncodingException the unsupported encoding exception
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diff changeset
475 */
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diff changeset
476 protected PrintWriter newWriter(OutputStream out,String encoding) throws UnsupportedEncodingException
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diff changeset
477 {
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diff changeset
478 return encoding==null?new PrintWriter(out):new PrintWriter(new OutputStreamWriter(out,encoding));
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diff changeset
479 }
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diff changeset
480
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parents:
diff changeset
481 /* ------------------------------------------------------------ */
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diff changeset
482 /**
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diff changeset
483 *@return the underlying CompressedStream implementation
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diff changeset
484 */
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485 protected abstract AbstractCompressedStream newCompressedStream(HttpServletRequest _request, HttpServletResponse response) throws IOException;
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diff changeset
486
3428c60d7cfc replace jetty jars with source
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diff changeset
487 }