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annotate src/org/eclipse/jetty/util/resource/JarFileResource.java @ 1038:b71ad168fe34

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rename Buffer.length() to remaining()
author Franklin Schmidt <fschmidt@gmail.com>
date Thu, 03 Nov 2016 22:16:11 -0600
parents 8e9db0bbf4f9
children
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rev   line source
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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.util.resource;
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20
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21 import java.io.File;
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22 import java.io.IOException;
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23 import java.net.JarURLConnection;
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24 import java.net.MalformedURLException;
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25 import java.net.URL;
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26 import java.util.ArrayList;
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27 import java.util.Enumeration;
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28 import java.util.List;
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29 import java.util.jar.JarEntry;
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30 import java.util.jar.JarFile;
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31
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32 import org.slf4j.Logger;
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33 import org.slf4j.LoggerFactory;
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34
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35 /* ------------------------------------------------------------ */
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36 class JarFileResource extends JarResource
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37 {
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38 private static final Logger LOG = LoggerFactory.getLogger(JarFileResource.class);
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39 private JarFile _jarFile;
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40 private File _file;
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41 private String[] _list;
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42 private JarEntry _entry;
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43 private boolean _directory;
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44 private String _jarUrl;
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45 private String _path;
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46 private boolean _exists;
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47
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48 /* -------------------------------------------------------- */
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49 JarFileResource(URL url)
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50 {
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51 super(url);
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52 }
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53
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54 /* ------------------------------------------------------------ */
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55 JarFileResource(URL url, boolean useCaches)
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56 {
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57 super(url, useCaches);
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58 }
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59
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60
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61 /* ------------------------------------------------------------ */
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62 @Override
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63 public synchronized void release()
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64 {
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65 _list=null;
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66 _entry=null;
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67 _file=null;
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68 //if the jvm is not doing url caching, then the JarFiles will not be cached either,
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69 //and so they are safe to close
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70 if (!getUseCaches())
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71 {
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72 if ( _jarFile != null )
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73 {
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74 try
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75 {
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76 LOG.debug("Closing JarFile "+_jarFile.getName());
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77 _jarFile.close();
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78 }
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79 catch ( IOException ioe )
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80 {
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81 LOG.trace("",ioe);
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82 }
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83 }
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84 }
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85 _jarFile=null;
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86 super.release();
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87 }
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88
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89 /* ------------------------------------------------------------ */
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90 @Override
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91 protected boolean checkConnection()
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92 {
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93 try
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94 {
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95 super.checkConnection();
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96 }
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97 finally
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98 {
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99 if (_jarConnection==null)
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100 {
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101 _entry=null;
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102 _file=null;
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103 _jarFile=null;
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104 _list=null;
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105 }
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106 }
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107 return _jarFile!=null;
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108 }
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109
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110
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111 /* ------------------------------------------------------------ */
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112 @Override
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113 protected synchronized void newConnection()
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114 throws IOException
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115 {
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116 super.newConnection();
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117
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118 _entry=null;
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119 _file=null;
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120 _jarFile=null;
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121 _list=null;
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122
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123 int sep = _urlString.indexOf("!/");
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124 _jarUrl=_urlString.substring(0,sep+2);
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125 _path=_urlString.substring(sep+2);
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126 if (_path.length()==0)
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127 _path=null;
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128 _jarFile=_jarConnection.getJarFile();
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129 _file=new File(_jarFile.getName());
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130 }
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131
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132
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133 /* ------------------------------------------------------------ */
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134 /**
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135 * Returns true if the represented resource exists.
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136 */
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137 @Override
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138 public boolean exists()
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139 {
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140 if (_exists)
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141 return true;
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142
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143 if (_urlString.endsWith("!/"))
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144 {
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145
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146 String file_url=_urlString.substring(4,_urlString.length()-2);
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147 try{return newResource(file_url).exists();}
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148 catch(Exception e) {LOG.trace("",e); return false;}
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149 }
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150
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151 boolean check=checkConnection();
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152
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153 // Is this a root URL?
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154 if (_jarUrl!=null && _path==null)
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155 {
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156 // Then if it exists it is a directory
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157 _directory=check;
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158 return true;
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159 }
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160 else
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161 {
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162 // Can we find a file for it?
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163 JarFile jarFile=null;
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164 if (check)
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165 // Yes
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166 jarFile=_jarFile;
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167 else
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168 {
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169 // No - so lets look if the root entry exists.
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170 try
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171 {
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172 JarURLConnection c=(JarURLConnection)((new URL(_jarUrl)).openConnection());
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173 c.setUseCaches(getUseCaches());
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174 jarFile=c.getJarFile();
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175 }
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176 catch(Exception e)
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177 {
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diff changeset
178 LOG.trace("",e);
802
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179 }
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180 }
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181
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182 // Do we need to look more closely?
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183 if (jarFile!=null && _entry==null && !_directory)
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184 {
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185 // OK - we have a JarFile, lets look at the entries for our path
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186 Enumeration<JarEntry> e=jarFile.entries();
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187 while(e.hasMoreElements())
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188 {
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189 JarEntry entry = (JarEntry) e.nextElement();
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190 String name=entry.getName().replace('\\','/');
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191
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192 // Do we have a match
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193 if (name.equals(_path))
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194 {
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195 _entry=entry;
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196 // Is the match a directory
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197 _directory=_path.endsWith("/");
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198 break;
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199 }
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200 else if (_path.endsWith("/"))
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201 {
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202 if (name.startsWith(_path))
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203 {
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204 _directory=true;
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205 break;
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206 }
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207 }
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208 else if (name.startsWith(_path) && name.length()>_path.length() && name.charAt(_path.length())=='/')
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209 {
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210 _directory=true;
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211 break;
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212 }
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213 }
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214
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215 if (_directory && !_urlString.endsWith("/"))
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216 {
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217 _urlString+="/";
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218 try
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219 {
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220 _url=new URL(_urlString);
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221 }
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222 catch(MalformedURLException ex)
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223 {
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8e9db0bbf4f9 remove org.eclipse.jetty.util.log and upgrade slf4j
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diff changeset
224 LOG.warn("",ex);
802
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225 }
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226 }
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227 }
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diff changeset
228 }
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229
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230 _exists= ( _directory || _entry!=null);
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231 return _exists;
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232 }
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233
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234
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235 /* ------------------------------------------------------------ */
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236 /**
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237 * Returns true if the represented resource is a container/directory.
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238 * If the resource is not a file, resources ending with "/" are
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239 * considered directories.
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240 */
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241 @Override
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242 public boolean isDirectory()
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243 {
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244 return _urlString.endsWith("/") || exists() && _directory;
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245 }
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246
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247 /* ------------------------------------------------------------ */
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diff changeset
248 /**
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249 * Returns the last modified time
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250 */
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251 @Override
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diff changeset
252 public long lastModified()
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253 {
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diff changeset
254 if (checkConnection() && _file!=null)
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diff changeset
255 {
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diff changeset
256 if (exists() && _entry!=null)
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diff changeset
257 return _entry.getTime();
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diff changeset
258 return _file.lastModified();
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diff changeset
259 }
3428c60d7cfc replace jetty jars with source
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diff changeset
260 return -1;
3428c60d7cfc replace jetty jars with source
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diff changeset
261 }
3428c60d7cfc replace jetty jars with source
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diff changeset
262
3428c60d7cfc replace jetty jars with source
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diff changeset
263 /* ------------------------------------------------------------ */
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diff changeset
264 @Override
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diff changeset
265 public synchronized String[] list()
3428c60d7cfc replace jetty jars with source
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diff changeset
266 {
3428c60d7cfc replace jetty jars with source
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diff changeset
267 if (isDirectory() && _list==null)
3428c60d7cfc replace jetty jars with source
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268 {
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diff changeset
269 List<String> list = null;
3428c60d7cfc replace jetty jars with source
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diff changeset
270 try
3428c60d7cfc replace jetty jars with source
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diff changeset
271 {
3428c60d7cfc replace jetty jars with source
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diff changeset
272 list = listEntries();
3428c60d7cfc replace jetty jars with source
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diff changeset
273 }
3428c60d7cfc replace jetty jars with source
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diff changeset
274 catch (Exception e)
3428c60d7cfc replace jetty jars with source
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parents:
diff changeset
275 {
3428c60d7cfc replace jetty jars with source
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diff changeset
276 //Sun's JarURLConnection impl for jar: protocol will close a JarFile in its connect() method if
3428c60d7cfc replace jetty jars with source
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diff changeset
277 //useCaches == false (eg someone called URLConnection with defaultUseCaches==true).
3428c60d7cfc replace jetty jars with source
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diff changeset
278 //As their sun.net.www.protocol.jar package caches JarFiles and/or connections, we can wind up in
3428c60d7cfc replace jetty jars with source
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diff changeset
279 //the situation where the JarFile we have remembered in our _jarFile member has actually been closed
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diff changeset
280 //by other code.
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diff changeset
281 //So, do one retry to drop a connection and get a fresh JarFile
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diff changeset
282 LOG.warn("Retrying list:"+e);
820
8e9db0bbf4f9 remove org.eclipse.jetty.util.log and upgrade slf4j
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parents: 802
diff changeset
283 LOG.debug("",e);
802
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diff changeset
284 release();
3428c60d7cfc replace jetty jars with source
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diff changeset
285 list = listEntries();
3428c60d7cfc replace jetty jars with source
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parents:
diff changeset
286 }
3428c60d7cfc replace jetty jars with source
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parents:
diff changeset
287
3428c60d7cfc replace jetty jars with source
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parents:
diff changeset
288 if (list != null)
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parents:
diff changeset
289 {
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diff changeset
290 _list=new String[list.size()];
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diff changeset
291 list.toArray(_list);
3428c60d7cfc replace jetty jars with source
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diff changeset
292 }
3428c60d7cfc replace jetty jars with source
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diff changeset
293 }
3428c60d7cfc replace jetty jars with source
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parents:
diff changeset
294 return _list;
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parents:
diff changeset
295 }
3428c60d7cfc replace jetty jars with source
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diff changeset
296
3428c60d7cfc replace jetty jars with source
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diff changeset
297
3428c60d7cfc replace jetty jars with source
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diff changeset
298 /* ------------------------------------------------------------ */
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diff changeset
299 private List<String> listEntries ()
3428c60d7cfc replace jetty jars with source
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diff changeset
300 {
3428c60d7cfc replace jetty jars with source
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diff changeset
301 checkConnection();
3428c60d7cfc replace jetty jars with source
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parents:
diff changeset
302
3428c60d7cfc replace jetty jars with source
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parents:
diff changeset
303 ArrayList<String> list = new ArrayList<String>(32);
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parents:
diff changeset
304 JarFile jarFile=_jarFile;
3428c60d7cfc replace jetty jars with source
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parents:
diff changeset
305 if(jarFile==null)
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parents:
diff changeset
306 {
3428c60d7cfc replace jetty jars with source
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parents:
diff changeset
307 try
3428c60d7cfc replace jetty jars with source
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parents:
diff changeset
308 {
3428c60d7cfc replace jetty jars with source
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parents:
diff changeset
309 JarURLConnection jc=(JarURLConnection)((new URL(_jarUrl)).openConnection());
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diff changeset
310 jc.setUseCaches(getUseCaches());
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parents:
diff changeset
311 jarFile=jc.getJarFile();
3428c60d7cfc replace jetty jars with source
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parents:
diff changeset
312 }
3428c60d7cfc replace jetty jars with source
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parents:
diff changeset
313 catch(Exception e)
3428c60d7cfc replace jetty jars with source
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parents:
diff changeset
314 {
3428c60d7cfc replace jetty jars with source
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parents:
diff changeset
315
3428c60d7cfc replace jetty jars with source
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parents:
diff changeset
316 e.printStackTrace();
820
8e9db0bbf4f9 remove org.eclipse.jetty.util.log and upgrade slf4j
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parents: 802
diff changeset
317 LOG.trace("",e);
802
3428c60d7cfc replace jetty jars with source
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parents:
diff changeset
318 }
3428c60d7cfc replace jetty jars with source
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parents:
diff changeset
319 }
3428c60d7cfc replace jetty jars with source
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parents:
diff changeset
320
3428c60d7cfc replace jetty jars with source
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parents:
diff changeset
321 Enumeration<JarEntry> e=jarFile.entries();
3428c60d7cfc replace jetty jars with source
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parents:
diff changeset
322 String dir=_urlString.substring(_urlString.indexOf("!/")+2);
3428c60d7cfc replace jetty jars with source
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parents:
diff changeset
323 while(e.hasMoreElements())
3428c60d7cfc replace jetty jars with source
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parents:
diff changeset
324 {
3428c60d7cfc replace jetty jars with source
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parents:
diff changeset
325 JarEntry entry = e.nextElement();
3428c60d7cfc replace jetty jars with source
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parents:
diff changeset
326 String name=entry.getName().replace('\\','/');
3428c60d7cfc replace jetty jars with source
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parents:
diff changeset
327 if(!name.startsWith(dir) || name.length()==dir.length())
3428c60d7cfc replace jetty jars with source
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parents:
diff changeset
328 {
3428c60d7cfc replace jetty jars with source
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parents:
diff changeset
329 continue;
3428c60d7cfc replace jetty jars with source
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parents:
diff changeset
330 }
3428c60d7cfc replace jetty jars with source
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parents:
diff changeset
331 String listName=name.substring(dir.length());
3428c60d7cfc replace jetty jars with source
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parents:
diff changeset
332 int dash=listName.indexOf('/');
3428c60d7cfc replace jetty jars with source
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parents:
diff changeset
333 if (dash>=0)
3428c60d7cfc replace jetty jars with source
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parents:
diff changeset
334 {
3428c60d7cfc replace jetty jars with source
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parents:
diff changeset
335 //when listing jar:file urls, you get back one
3428c60d7cfc replace jetty jars with source
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parents:
diff changeset
336 //entry for the dir itself, which we ignore
3428c60d7cfc replace jetty jars with source
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parents:
diff changeset
337 if (dash==0 && listName.length()==1)
3428c60d7cfc replace jetty jars with source
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parents:
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338 continue;
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339 //when listing jar:file urls, all files and
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340 //subdirs have a leading /, which we remove
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341 if (dash==0)
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342 listName=listName.substring(dash+1, listName.length());
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343 else
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344 listName=listName.substring(0,dash+1);
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345
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346 if (list.contains(listName))
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347 continue;
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348 }
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349
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350 list.add(listName);
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351 }
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352
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353 return list;
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354 }
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355
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356
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357
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358
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359
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360 /* ------------------------------------------------------------ */
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361 /**
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362 * Return the length of the resource
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363 */
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364 @Override
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365 public long length()
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366 {
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367 if (isDirectory())
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368 return -1;
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369
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370 if (_entry!=null)
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371 return _entry.getSize();
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372
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373 return -1;
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374 }
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375
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376 /* ------------------------------------------------------------ */
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377 /** Encode according to this resource type.
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378 * File URIs are not encoded.
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379 * @param uri URI to encode.
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380 * @return The uri unchanged.
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381 */
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382 @Override
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383 public String encode(String uri)
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384 {
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385 return uri;
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386 }
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387
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388
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389 /**
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390 * Take a Resource that possibly might use URLConnection caching
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391 * and turn it into one that doesn't.
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392 * @param resource
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393 * @return the non-caching resource
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394 */
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395 public static Resource getNonCachingResource (Resource resource)
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396 {
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397 if (!(resource instanceof JarFileResource))
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398 return resource;
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399
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400 JarFileResource oldResource = (JarFileResource)resource;
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401
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402 JarFileResource newResource = new JarFileResource(oldResource.getURL(), false);
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403 return newResource;
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404
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405 }
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406
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407 /**
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408 * Check if this jar:file: resource is contained in the
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409 * named resource. Eg <code>jar:file:///a/b/c/foo.jar!/x.html</code> isContainedIn <code>file:///a/b/c/foo.jar</code>
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410 * @param resource
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411 * @return true if resource is contained in the named resource
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412 * @throws MalformedURLException
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413 */
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414 @Override
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415 public boolean isContainedIn (Resource resource)
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416 throws MalformedURLException
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417 {
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418 String string = _urlString;
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419 int index = string.indexOf("!/");
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420 if (index > 0)
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421 string = string.substring(0,index);
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422 if (string.startsWith("jar:"))
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423 string = string.substring(4);
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424 URL url = new URL(string);
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425 return url.sameFile(resource.getURL());
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426 }
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diff changeset
427 }
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parents:
diff changeset
428
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parents:
diff changeset
429
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parents:
diff changeset
430
3428c60d7cfc replace jetty jars with source
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parents:
diff changeset
431
3428c60d7cfc replace jetty jars with source
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parents:
diff changeset
432
3428c60d7cfc replace jetty jars with source
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parents:
diff changeset
433
3428c60d7cfc replace jetty jars with source
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parents:
diff changeset
434
3428c60d7cfc replace jetty jars with source
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parents:
diff changeset
435