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annotate src/org/eclipse/jetty/server/handler/ShutdownHandler.java @ 1039:a7319f14ba1e
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| author | Franklin Schmidt <fschmidt@gmail.com> |
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| date | Thu, 03 Nov 2016 22:55:28 -0600 |
| parents | 32d4b569567c |
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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.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.HttpServletResponse; |
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25 |
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26 import org.eclipse.jetty.server.Request; |
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27 import org.eclipse.jetty.server.Server; |
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28 import org.slf4j.Logger; |
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29 import org.slf4j.LoggerFactory; |
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30 |
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31 /* ------------------------------------------------------------ */ |
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32 /** |
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33 * 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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34 * made. |
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35 * |
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36 * This handler is a contribution from Johannes Brodwall: https://bugs.eclipse.org/bugs/show_bug.cgi?id=357687 |
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37 * |
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38 * Usage: |
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39 * |
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40 * <pre> |
| 1000 | 41 Server server = new Server(8080); |
| 42 HandlerList handlers = new HandlerList(); | |
| 43 handlers.setHandlers(new Handler[] | |
| 44 { someOtherHandler, new ShutdownHandler(server,"secret password") }); | |
| 45 server.setHandler(handlers); | |
| 46 server.start(); | |
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47 </pre> |
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48 * |
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49 <pre> |
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50 public static void attemptShutdown(int port, String shutdownCookie) { |
| 1000 | 51 try { |
| 52 URL url = new URL("http://localhost:" + port + "/shutdown?token=" + shutdownCookie); | |
| 53 HttpURLConnection connection = (HttpURLConnection)url.openConnection(); | |
| 54 connection.setRequestMethod("POST"); | |
| 55 connection.getResponseCode(); | |
| 56 logger.info("Shutting down " + url + ": " + connection.getResponseMessage()); | |
| 57 } catch (SocketException e) { | |
| 58 logger.debug("Not running"); | |
| 59 // Okay - the server is not running | |
| 60 } catch (IOException e) { | |
| 61 throw new RuntimeException(e); | |
| 62 } | |
| 63 } | |
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64 </pre> |
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65 */ |
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66 public class ShutdownHandler extends AbstractHandler |
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67 { |
| 1000 | 68 private static final Logger LOG = LoggerFactory.getLogger(ShutdownHandler.class); |
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69 |
| 1000 | 70 private final String _shutdownToken; |
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71 |
| 1000 | 72 private final Server _server; |
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73 |
| 1000 | 74 private boolean _exitJvm = false; |
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75 |
| 1000 | 76 |
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77 |
| 1000 | 78 /** |
| 79 * Creates a listener that lets the server be shut down remotely (but only from localhost). | |
| 80 * | |
| 81 * @param server | |
| 82 * the Jetty instance that should be shut down | |
| 83 * @param shutdownToken | |
| 84 * a secret password to avoid unauthorized shutdown attempts | |
| 85 */ | |
| 86 public ShutdownHandler(Server server, String shutdownToken) | |
| 87 { | |
| 88 this._server = server; | |
| 89 this._shutdownToken = shutdownToken; | |
| 90 } | |
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91 |
| 1000 | 92 @Override |
| 93 public void handle(String target, Request request, HttpServletResponse response) throws IOException, ServletException | |
| 94 { | |
| 95 if (!target.equals("/shutdown")) | |
| 96 { | |
| 97 return; | |
| 98 } | |
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99 |
| 1000 | 100 if (!request.getMethod().equals("POST")) |
| 101 { | |
| 102 response.sendError(HttpServletResponse.SC_BAD_REQUEST); | |
| 103 return; | |
| 104 } | |
| 105 if (!hasCorrectSecurityToken(request)) | |
| 106 { | |
| 107 LOG.warn("Unauthorized shutdown attempt from " + getRemoteAddr(request)); | |
| 108 response.sendError(HttpServletResponse.SC_UNAUTHORIZED); | |
| 109 return; | |
| 110 } | |
| 111 if (!requestFromLocalhost(request)) | |
| 112 { | |
| 113 LOG.warn("Unauthorized shutdown attempt from " + getRemoteAddr(request)); | |
| 114 response.sendError(HttpServletResponse.SC_UNAUTHORIZED); | |
| 115 return; | |
| 116 } | |
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117 |
| 1000 | 118 LOG.info("Shutting down by request from " + getRemoteAddr(request)); |
| 119 | |
| 120 new Thread() | |
| 121 { | |
| 122 public void run () | |
| 123 { | |
| 124 try | |
| 125 { | |
| 126 shutdownServer(); | |
| 127 } | |
| 128 catch (InterruptedException e) | |
| 129 { | |
| 130 LOG.trace("",e); | |
| 131 } | |
| 132 catch (Exception e) | |
| 133 { | |
| 134 throw new RuntimeException("Shutting down server",e); | |
| 135 } | |
| 136 } | |
| 137 }.start(); | |
| 138 } | |
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139 |
| 1000 | 140 private boolean requestFromLocalhost(Request request) |
| 141 { | |
| 142 return "127.0.0.1".equals(getRemoteAddr(request)); | |
| 143 } | |
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144 |
| 1000 | 145 protected String getRemoteAddr(Request request) |
| 146 { | |
| 147 return request.getRemoteAddr(); | |
| 148 } | |
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149 |
| 1000 | 150 private boolean hasCorrectSecurityToken(Request request) |
| 151 { | |
| 152 return _shutdownToken.equals(request.getParameter("token")); | |
| 153 } | |
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154 |
| 1000 | 155 private void shutdownServer() throws Exception |
| 156 { | |
| 157 _server.stop(); | |
| 158 | |
| 159 if (_exitJvm) | |
| 160 { | |
| 161 System.exit(0); | |
| 162 } | |
| 163 } | |
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164 |
| 1000 | 165 public void setExitJvm(boolean exitJvm) |
| 166 { | |
| 167 this._exitJvm = exitJvm; | |
| 168 } | |
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169 |
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170 } |