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annotate src/org/eclipse/jetty/server/handler/ShutdownHandler.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 |
parents | 3428c60d7cfc |
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 |
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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.server.Request; |
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28 import org.eclipse.jetty.server.Server; |
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29 import org.eclipse.jetty.util.log.Log; |
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30 import org.eclipse.jetty.util.log.Logger; |
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31 |
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32 /* ------------------------------------------------------------ */ |
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33 /** |
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34 * A handler that shuts the server down on a valid request. Used to do "soft" restarts from Java. If _exitJvm ist set to true a hard System.exit() call is being |
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35 * made. |
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36 * |
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37 * This handler is a contribution from Johannes Brodwall: https://bugs.eclipse.org/bugs/show_bug.cgi?id=357687 |
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38 * |
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39 * Usage: |
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40 * |
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41 * <pre> |
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42 Server server = new Server(8080); |
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43 HandlerList handlers = new HandlerList(); |
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44 handlers.setHandlers(new Handler[] |
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45 { someOtherHandler, new ShutdownHandler(server,"secret password") }); |
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46 server.setHandler(handlers); |
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47 server.start(); |
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48 </pre> |
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49 * |
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50 <pre> |
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51 public static void attemptShutdown(int port, String shutdownCookie) { |
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52 try { |
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53 URL url = new URL("http://localhost:" + port + "/shutdown?token=" + shutdownCookie); |
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54 HttpURLConnection connection = (HttpURLConnection)url.openConnection(); |
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55 connection.setRequestMethod("POST"); |
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56 connection.getResponseCode(); |
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57 logger.info("Shutting down " + url + ": " + connection.getResponseMessage()); |
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58 } catch (SocketException e) { |
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59 logger.debug("Not running"); |
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60 // Okay - the server is not running |
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61 } catch (IOException e) { |
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62 throw new RuntimeException(e); |
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63 } |
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64 } |
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65 </pre> |
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66 */ |
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67 public class ShutdownHandler extends AbstractHandler |
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68 { |
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69 private static final Logger LOG = Log.getLogger(ShutdownHandler.class); |
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70 |
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71 private final String _shutdownToken; |
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72 |
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73 private final Server _server; |
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74 |
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75 private boolean _exitJvm = false; |
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76 |
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77 |
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78 |
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79 /** |
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80 * Creates a listener that lets the server be shut down remotely (but only from localhost). |
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81 * |
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82 * @param server |
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83 * the Jetty instance that should be shut down |
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84 * @param shutdownToken |
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85 * a secret password to avoid unauthorized shutdown attempts |
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86 */ |
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87 public ShutdownHandler(Server server, String shutdownToken) |
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88 { |
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89 this._server = server; |
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90 this._shutdownToken = shutdownToken; |
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91 } |
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92 |
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93 public void handle(String target, Request baseRequest, HttpServletRequest request, HttpServletResponse response) throws IOException, ServletException |
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94 { |
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95 if (!target.equals("/shutdown")) |
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96 { |
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97 return; |
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98 } |
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99 |
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100 if (!request.getMethod().equals("POST")) |
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101 { |
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102 response.sendError(HttpServletResponse.SC_BAD_REQUEST); |
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103 return; |
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104 } |
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105 if (!hasCorrectSecurityToken(request)) |
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106 { |
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107 LOG.warn("Unauthorized shutdown attempt from " + getRemoteAddr(request)); |
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108 response.sendError(HttpServletResponse.SC_UNAUTHORIZED); |
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109 return; |
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110 } |
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111 if (!requestFromLocalhost(request)) |
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112 { |
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113 LOG.warn("Unauthorized shutdown attempt from " + getRemoteAddr(request)); |
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114 response.sendError(HttpServletResponse.SC_UNAUTHORIZED); |
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115 return; |
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116 } |
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117 |
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118 LOG.info("Shutting down by request from " + getRemoteAddr(request)); |
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119 |
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120 new Thread() |
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121 { |
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122 public void run () |
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123 { |
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124 try |
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125 { |
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126 shutdownServer(); |
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127 } |
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128 catch (InterruptedException e) |
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129 { |
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130 LOG.ignore(e); |
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131 } |
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132 catch (Exception e) |
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133 { |
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134 throw new RuntimeException("Shutting down server",e); |
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135 } |
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136 } |
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137 }.start(); |
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138 } |
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139 |
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140 private boolean requestFromLocalhost(HttpServletRequest request) |
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141 { |
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142 return "127.0.0.1".equals(getRemoteAddr(request)); |
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143 } |
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144 |
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145 protected String getRemoteAddr(HttpServletRequest request) |
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146 { |
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147 return request.getRemoteAddr(); |
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148 } |
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149 |
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150 private boolean hasCorrectSecurityToken(HttpServletRequest request) |
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151 { |
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152 return _shutdownToken.equals(request.getParameter("token")); |
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153 } |
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154 |
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155 private void shutdownServer() throws Exception |
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156 { |
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157 _server.stop(); |
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158 |
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159 if (_exitJvm) |
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160 { |
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161 System.exit(0); |
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162 } |
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163 } |
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164 |
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165 public void setExitJvm(boolean exitJvm) |
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166 { |
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167 this._exitJvm = exitJvm; |
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168 } |
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169 |
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170 } |