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annotate src/org/eclipse/jetty/server/handler/MovedContextHandler.java @ 840:0f53601ea489

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author Franklin Schmidt <fschmidt@gmail.com>
date Mon, 19 Sep 2016 14:20:18 -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.server.handler;
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20
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21 import java.io.IOException;
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22
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23 import javax.servlet.ServletException;
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24 import javax.servlet.http.HttpServletRequest;
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25 import javax.servlet.http.HttpServletResponse;
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26
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27 import org.eclipse.jetty.http.HttpHeaders;
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28 import org.eclipse.jetty.server.HandlerContainer;
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29 import org.eclipse.jetty.server.Request;
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30 import org.eclipse.jetty.util.URIUtil;
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31
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32 /* ------------------------------------------------------------ */
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33 /** Moved ContextHandler.
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34 * This context can be used to replace a context that has changed
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35 * location. Requests are redirected (either to a fixed URL or to a
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36 * new context base).
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37 */
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38 public class MovedContextHandler extends ContextHandler
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39 {
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40 final Redirector _redirector;
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41 String _newContextURL;
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42 boolean _discardPathInfo;
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43 boolean _discardQuery;
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44 boolean _permanent;
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45 String _expires;
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46
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47 public MovedContextHandler()
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48 {
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49 _redirector=new Redirector();
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50 setHandler(_redirector);
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51 setAllowNullPathInfo(true);
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52 }
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53
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54 public MovedContextHandler(HandlerContainer parent, String contextPath, String newContextURL)
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55 {
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56 super(parent,contextPath);
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57 _newContextURL=newContextURL;
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58 _redirector=new Redirector();
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59 setHandler(_redirector);
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60 }
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61
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62 public boolean isDiscardPathInfo()
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63 {
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64 return _discardPathInfo;
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65 }
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66
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67 public void setDiscardPathInfo(boolean discardPathInfo)
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68 {
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69 _discardPathInfo = discardPathInfo;
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70 }
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71
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72 public String getNewContextURL()
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73 {
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74 return _newContextURL;
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75 }
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76
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77 public void setNewContextURL(String newContextURL)
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78 {
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79 _newContextURL = newContextURL;
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80 }
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81
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82 public boolean isPermanent()
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83 {
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84 return _permanent;
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85 }
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86
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87 public void setPermanent(boolean permanent)
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88 {
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89 _permanent = permanent;
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90 }
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91
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92 public boolean isDiscardQuery()
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93 {
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94 return _discardQuery;
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95 }
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96
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97 public void setDiscardQuery(boolean discardQuery)
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98 {
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99 _discardQuery = discardQuery;
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100 }
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101
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102 private class Redirector extends AbstractHandler
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103 {
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104 public void handle(String target, Request baseRequest, HttpServletRequest request, HttpServletResponse response) throws IOException, ServletException
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105 {
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106 if (_newContextURL==null)
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107 return;
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108
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109 String path=_newContextURL;
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110 if (!_discardPathInfo && request.getPathInfo()!=null)
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111 path=URIUtil.addPaths(path, request.getPathInfo());
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112
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113 StringBuilder location = URIUtil.hasScheme(path)?new StringBuilder():baseRequest.getRootURL();
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114
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115 location.append(path);
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116 if (!_discardQuery && request.getQueryString()!=null)
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117 {
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118 location.append('?');
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119 String q=request.getQueryString();
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120 q=q.replaceAll("\r\n?&=","!");
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121 location.append(q);
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122 }
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123
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124 response.setHeader(HttpHeaders.LOCATION,location.toString());
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125
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126 if (_expires!=null)
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127 response.setHeader(HttpHeaders.EXPIRES,_expires);
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128
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129 response.setStatus(_permanent?HttpServletResponse.SC_MOVED_PERMANENTLY:HttpServletResponse.SC_FOUND);
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130 response.setContentLength(0);
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131 baseRequest.setHandled(true);
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132 }
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133
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134 }
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135
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136 /* ------------------------------------------------------------ */
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137 /**
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138 * @return the expires header value or null if no expires header
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139 */
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140 public String getExpires()
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141 {
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142 return _expires;
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143 }
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144
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145 /* ------------------------------------------------------------ */
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146 /**
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147 * @param expires the expires header value or null if no expires header
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148 */
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149 public void setExpires(String expires)
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150 {
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151 _expires = expires;
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152 }
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153
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154 }