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annotate src/org/eclipse/jetty/http/gzip/CompressedResponseWrapper.java @ 807:947b11aa3157
remove jetty favicon
author | Franklin Schmidt <fschmidt@gmail.com> |
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date | Wed, 07 Sep 2016 23:26:12 -0600 |
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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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299 public void sendError(int sc) throws IOException |
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300 { |
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301 resetBuffer(); |
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302 super.sendError(sc); |
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303 } |
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304 |
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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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308 */ |
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309 @Override |
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310 public void sendRedirect(String location) throws IOException |
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311 { |
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312 resetBuffer(); |
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313 super.sendRedirect(location); |
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314 } |
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315 |
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316 /* ------------------------------------------------------------ */ |
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317 /** |
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318 * @see org.eclipse.jetty.http.gzip.CompressedResponseWrapper#noCompression() |
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319 */ |
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320 public void noCompression() |
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321 { |
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322 if (!_noCompression) |
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323 setDeferredHeaders(); |
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324 _noCompression=true; |
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325 if (_compressedStream!=null) |
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326 { |
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327 try |
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328 { |
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329 _compressedStream.doNotCompress(false); |
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330 } |
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331 catch (IOException e) |
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332 { |
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333 throw new IllegalStateException(e); |
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334 } |
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335 } |
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336 } |
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337 |
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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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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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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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458 { |
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459 _contentLength=value; |
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460 if (_compressedStream!=null) |
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461 _compressedStream.setContentLength(); |
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462 } |
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463 else |
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464 super.setIntHeader(name,value); |
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465 } |
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466 |
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467 /* ------------------------------------------------------------ */ |
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468 /** |
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469 * Allows derived implementations to replace PrintWriter implementation. |
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470 * |
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471 * @param out the out |
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472 * @param encoding the encoding |
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473 * @return the prints the writer |
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474 * @throws UnsupportedEncodingException the unsupported encoding exception |
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475 */ |
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476 protected PrintWriter newWriter(OutputStream out,String encoding) throws UnsupportedEncodingException |
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477 { |
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478 return encoding==null?new PrintWriter(out):new PrintWriter(new OutputStreamWriter(out,encoding)); |
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479 } |
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480 |
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481 /* ------------------------------------------------------------ */ |
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482 /** |
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483 *@return the underlying CompressedStream implementation |
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484 */ |
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485 protected abstract AbstractCompressedStream newCompressedStream(HttpServletRequest _request, HttpServletResponse response) throws IOException; |
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486 |
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487 } |