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annotate src/org/eclipse/jetty/server/handler/ContextHandlerCollection.java @ 802:3428c60d7cfc

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replace jetty jars with source
author Franklin Schmidt <fschmidt@gmail.com>
date Wed, 07 Sep 2016 21:15:48 -0600
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children 8e9db0bbf4f9
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1 //
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2 // ========================================================================
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3 // Copyright (c) 1995-2014 Mort Bay Consulting Pty. Ltd.
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4 // ------------------------------------------------------------------------
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5 // All rights reserved. This program and the accompanying materials
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6 // are made available under the terms of the Eclipse Public License v1.0
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7 // and Apache License v2.0 which accompanies this distribution.
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8 //
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9 // The Eclipse Public License is available at
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10 // http://www.eclipse.org/legal/epl-v10.html
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11 //
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12 // The Apache License v2.0 is available at
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13 // http://www.opensource.org/licenses/apache2.0.php
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14 //
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15 // You may elect to redistribute this code under either of these licenses.
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16 // ========================================================================
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17 //
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18
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19 package org.eclipse.jetty.server.handler;
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20
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21 import java.io.IOException;
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22 import java.util.HashMap;
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23 import java.util.Map;
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24
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25 import javax.servlet.ServletException;
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26 import javax.servlet.http.HttpServletRequest;
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27 import javax.servlet.http.HttpServletResponse;
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28
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29 import org.eclipse.jetty.http.PathMap;
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30 import org.eclipse.jetty.server.AsyncContinuation;
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31 import org.eclipse.jetty.server.Handler;
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32 import org.eclipse.jetty.server.HandlerContainer;
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33 import org.eclipse.jetty.server.Request;
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34 import org.eclipse.jetty.util.LazyList;
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35 import org.eclipse.jetty.util.log.Log;
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36 import org.eclipse.jetty.util.log.Logger;
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37
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38 /* ------------------------------------------------------------ */
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39 /** ContextHandlerCollection.
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40 *
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41 * This {@link org.eclipse.jetty.server.handler.HandlerCollection} is creates a
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42 * {@link org.eclipse.jetty.http.PathMap} to it's contained handlers based
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43 * on the context path and virtual hosts of any contained {@link org.eclipse.jetty.server.handler.ContextHandler}s.
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44 * The contexts do not need to be directly contained, only children of the contained handlers.
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45 * Multiple contexts may have the same context path and they are called in order until one
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46 * handles the request.
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47 *
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48 * @org.apache.xbean.XBean element="contexts"
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49 */
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50 public class ContextHandlerCollection extends HandlerCollection
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51 {
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52 private static final Logger LOG = Log.getLogger(ContextHandlerCollection.class);
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53
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54 private volatile PathMap _contextMap;
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55 private Class<? extends ContextHandler> _contextClass = ContextHandler.class;
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56
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57 /* ------------------------------------------------------------ */
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58 public ContextHandlerCollection()
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59 {
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60 super(true);
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61 }
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62
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63
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64 /* ------------------------------------------------------------ */
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65 /**
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66 * Remap the context paths.
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67 */
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68 public void mapContexts()
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69 {
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70 PathMap contextMap = new PathMap();
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71 Handler[] branches = getHandlers();
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72
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73
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74 for (int b=0;branches!=null && b<branches.length;b++)
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75 {
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76 Handler[] handlers=null;
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77
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78 if (branches[b] instanceof ContextHandler)
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79 {
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80 handlers = new Handler[]{ branches[b] };
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81 }
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82 else if (branches[b] instanceof HandlerContainer)
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83 {
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84 handlers = ((HandlerContainer)branches[b]).getChildHandlersByClass(ContextHandler.class);
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85 }
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86 else
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87 continue;
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88
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89 for (int i=0;i<handlers.length;i++)
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90 {
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91 ContextHandler handler=(ContextHandler)handlers[i];
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92
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93 String contextPath=handler.getContextPath();
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94
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95 if (contextPath==null || contextPath.indexOf(',')>=0 || contextPath.startsWith("*"))
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96 throw new IllegalArgumentException ("Illegal context spec:"+contextPath);
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97
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98 if(!contextPath.startsWith("/"))
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99 contextPath='/'+contextPath;
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100
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101 if (contextPath.length()>1)
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102 {
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103 if (contextPath.endsWith("/"))
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104 contextPath+="*";
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105 else if (!contextPath.endsWith("/*"))
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106 contextPath+="/*";
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107 }
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108
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109 Object contexts=contextMap.get(contextPath);
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110 String[] vhosts=handler.getVirtualHosts();
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111
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112
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113 if (vhosts!=null && vhosts.length>0)
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114 {
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115 Map hosts;
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116
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117 if (contexts instanceof Map)
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118 hosts=(Map)contexts;
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119 else
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120 {
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121 hosts=new HashMap();
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122 hosts.put("*",contexts);
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123 contextMap.put(contextPath, hosts);
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124 }
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125
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126 for (int j=0;j<vhosts.length;j++)
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127 {
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128 String vhost=vhosts[j];
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129 contexts=hosts.get(vhost);
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130 contexts=LazyList.add(contexts,branches[b]);
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131 hosts.put(vhost,contexts);
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132 }
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133 }
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134 else if (contexts instanceof Map)
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135 {
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136 Map hosts=(Map)contexts;
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137 contexts=hosts.get("*");
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138 contexts= LazyList.add(contexts, branches[b]);
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139 hosts.put("*",contexts);
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140 }
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141 else
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142 {
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143 contexts= LazyList.add(contexts, branches[b]);
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144 contextMap.put(contextPath, contexts);
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145 }
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146 }
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147 }
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148 _contextMap=contextMap;
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149
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150 }
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151
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152
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153
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154 /* ------------------------------------------------------------ */
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155 /*
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156 * @see org.eclipse.jetty.server.server.handler.HandlerCollection#setHandlers(org.eclipse.jetty.server.server.Handler[])
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157 */
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158 @Override
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159 public void setHandlers(Handler[] handlers)
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160 {
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161 _contextMap=null;
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162 super.setHandlers(handlers);
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163 if (isStarted())
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164 mapContexts();
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165 }
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166
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167 /* ------------------------------------------------------------ */
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168 @Override
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169 protected void doStart() throws Exception
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170 {
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171 mapContexts();
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172 super.doStart();
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173 }
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174
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175
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176 /* ------------------------------------------------------------ */
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177 /*
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178 * @see org.eclipse.jetty.server.server.Handler#handle(java.lang.String, javax.servlet.http.HttpServletRequest, javax.servlet.http.HttpServletResponse, int)
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179 */
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180 @Override
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181 public void handle(String target, Request baseRequest, HttpServletRequest request, HttpServletResponse response) throws IOException, ServletException
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182 {
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183 Handler[] handlers = getHandlers();
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184 if (handlers==null || handlers.length==0)
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185 return;
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186
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187 AsyncContinuation async = baseRequest.getAsyncContinuation();
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188 if (async.isAsync())
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189 {
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190 ContextHandler context=async.getContextHandler();
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191 if (context!=null)
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192 {
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193 context.handle(target,baseRequest,request, response);
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194 return;
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195 }
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196 }
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197
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198 // data structure which maps a request to a context; first-best match wins
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199 // { context path =>
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200 // { virtual host => context }
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201 // }
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202 PathMap map = _contextMap;
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203 if (map!=null && target!=null && target.startsWith("/"))
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204 {
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205 // first, get all contexts matched by context path
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206 Object contexts = map.getLazyMatches(target);
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207
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208 for (int i=0; i<LazyList.size(contexts); i++)
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209 {
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210 // then, match against the virtualhost of each context
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211 Map.Entry entry = (Map.Entry)LazyList.get(contexts, i);
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212 Object list = entry.getValue();
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213
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214 if (list instanceof Map)
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215 {
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216 Map hosts = (Map)list;
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217 String host = normalizeHostname(request.getServerName());
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218
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219 // explicitly-defined virtual hosts, most specific
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220 list=hosts.get(host);
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221 for (int j=0; j<LazyList.size(list); j++)
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222 {
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223 Handler handler = (Handler)LazyList.get(list,j);
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224 handler.handle(target,baseRequest, request, response);
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225 if (baseRequest.isHandled())
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226 return;
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227 }
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228
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229 // wildcard for one level of names
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230 list=hosts.get("*."+host.substring(host.indexOf(".")+1));
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231 for (int j=0; j<LazyList.size(list); j++)
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232 {
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233 Handler handler = (Handler)LazyList.get(list,j);
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234 handler.handle(target,baseRequest, request, response);
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235 if (baseRequest.isHandled())
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236 return;
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237 }
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238
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239 // no virtualhosts defined for the context, least specific
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240 // will handle any request that does not match to a specific virtual host above
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241 list=hosts.get("*");
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242 for (int j=0; j<LazyList.size(list); j++)
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243 {
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244 Handler handler = (Handler)LazyList.get(list,j);
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245 handler.handle(target,baseRequest, request, response);
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246 if (baseRequest.isHandled())
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247 return;
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248 }
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249 }
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250 else
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251 {
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252 for (int j=0; j<LazyList.size(list); j++)
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253 {
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254 Handler handler = (Handler)LazyList.get(list,j);
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255 handler.handle(target,baseRequest, request, response);
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256 if (baseRequest.isHandled())
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257 return;
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258 }
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259 }
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260 }
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261 }
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262 else
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263 {
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264 // This may not work in all circumstances... but then I think it should never be called
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265 for (int i=0;i<handlers.length;i++)
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266 {
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267 handlers[i].handle(target,baseRequest, request, response);
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268 if ( baseRequest.isHandled())
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269 return;
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270 }
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271 }
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272 }
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273
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274
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275 /* ------------------------------------------------------------ */
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276 /** Add a context handler.
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277 * @param contextPath The context path to add
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278 * @return the ContextHandler just added
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279 */
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280 public ContextHandler addContext(String contextPath,String resourceBase)
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281 {
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282 try
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283 {
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284 ContextHandler context = _contextClass.newInstance();
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285 context.setContextPath(contextPath);
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286 context.setResourceBase(resourceBase);
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287 addHandler(context);
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288 return context;
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289 }
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290 catch (Exception e)
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291 {
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292 LOG.debug(e);
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293 throw new Error(e);
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294 }
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295 }
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296
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297
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298
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299 /* ------------------------------------------------------------ */
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300 /**
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301 * @return The class to use to add new Contexts
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302 */
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303 public Class getContextClass()
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304 {
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305 return _contextClass;
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306 }
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307
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308
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309 /* ------------------------------------------------------------ */
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310 /**
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311 * @param contextClass The class to use to add new Contexts
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312 */
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313 public void setContextClass(Class contextClass)
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314 {
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315 if (contextClass ==null || !(ContextHandler.class.isAssignableFrom(contextClass)))
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316 throw new IllegalArgumentException();
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317 _contextClass = contextClass;
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318 }
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319
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320 /* ------------------------------------------------------------ */
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321 private String normalizeHostname( String host )
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322 {
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323 if ( host == null )
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324 return null;
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325
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326 if ( host.endsWith( "." ) )
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327 return host.substring( 0, host.length() -1);
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328
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329 return host;
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330 }
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331
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332 }