| // |
| // ======================================================================== |
| // Copyright (c) 1995-2014 Mort Bay Consulting Pty. Ltd. |
| // ------------------------------------------------------------------------ |
| // All rights reserved. This program and the accompanying materials |
| // are made available under the terms of the Eclipse Public License v1.0 |
| // and Apache License v2.0 which accompanies this distribution. |
| // |
| // The Eclipse Public License is available at |
| // http://www.eclipse.org/legal/epl-v10.html |
| // |
| // The Apache License v2.0 is available at |
| // http://www.opensource.org/licenses/apache2.0.php |
| // |
| // You may elect to redistribute this code under either of these licenses. |
| // ======================================================================== |
| // |
| |
| package org.eclipse.jetty.server.handler; |
| |
| import java.io.IOException; |
| |
| import javax.servlet.ServletException; |
| import javax.servlet.http.HttpServletRequest; |
| import javax.servlet.http.HttpServletResponse; |
| |
| import org.eclipse.jetty.server.Request; |
| import org.eclipse.jetty.server.Server; |
| import org.eclipse.jetty.util.log.Log; |
| import org.eclipse.jetty.util.log.Logger; |
| |
| /* ------------------------------------------------------------ */ |
| /** |
| * 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 |
| * made. |
| * |
| * This handler is a contribution from Johannes Brodwall: https://bugs.eclipse.org/bugs/show_bug.cgi?id=357687 |
| * |
| * Usage: |
| * |
| * <pre> |
| Server server = new Server(8080); |
| HandlerList handlers = new HandlerList(); |
| handlers.setHandlers(new Handler[] |
| { someOtherHandler, new ShutdownHandler(server,"secret password") }); |
| server.setHandler(handlers); |
| server.start(); |
| </pre> |
| * |
| <pre> |
| public static void attemptShutdown(int port, String shutdownCookie) { |
| try { |
| URL url = new URL("http://localhost:" + port + "/shutdown?token=" + shutdownCookie); |
| HttpURLConnection connection = (HttpURLConnection)url.openConnection(); |
| connection.setRequestMethod("POST"); |
| connection.getResponseCode(); |
| logger.info("Shutting down " + url + ": " + connection.getResponseMessage()); |
| } catch (SocketException e) { |
| logger.debug("Not running"); |
| // Okay - the server is not running |
| } catch (IOException e) { |
| throw new RuntimeException(e); |
| } |
| } |
| </pre> |
| */ |
| public class ShutdownHandler extends AbstractHandler |
| { |
| private static final Logger LOG = Log.getLogger(ShutdownHandler.class); |
| |
| private final String _shutdownToken; |
| |
| private final Server _server; |
| |
| private boolean _exitJvm = false; |
| |
| |
| |
| /** |
| * Creates a listener that lets the server be shut down remotely (but only from localhost). |
| * |
| * @param server |
| * the Jetty instance that should be shut down |
| * @param shutdownToken |
| * a secret password to avoid unauthorized shutdown attempts |
| */ |
| public ShutdownHandler(Server server, String shutdownToken) |
| { |
| this._server = server; |
| this._shutdownToken = shutdownToken; |
| } |
| |
| public void handle(String target, Request baseRequest, HttpServletRequest request, HttpServletResponse response) throws IOException, ServletException |
| { |
| if (!target.equals("/shutdown")) |
| { |
| return; |
| } |
| |
| if (!request.getMethod().equals("POST")) |
| { |
| response.sendError(HttpServletResponse.SC_BAD_REQUEST); |
| return; |
| } |
| if (!hasCorrectSecurityToken(request)) |
| { |
| LOG.warn("Unauthorized shutdown attempt from " + getRemoteAddr(request)); |
| response.sendError(HttpServletResponse.SC_UNAUTHORIZED); |
| return; |
| } |
| if (!requestFromLocalhost(request)) |
| { |
| LOG.warn("Unauthorized shutdown attempt from " + getRemoteAddr(request)); |
| response.sendError(HttpServletResponse.SC_UNAUTHORIZED); |
| return; |
| } |
| |
| LOG.info("Shutting down by request from " + getRemoteAddr(request)); |
| |
| new Thread() |
| { |
| public void run () |
| { |
| try |
| { |
| shutdownServer(); |
| } |
| catch (InterruptedException e) |
| { |
| LOG.ignore(e); |
| } |
| catch (Exception e) |
| { |
| throw new RuntimeException("Shutting down server",e); |
| } |
| } |
| }.start(); |
| } |
| |
| private boolean requestFromLocalhost(HttpServletRequest request) |
| { |
| return "127.0.0.1".equals(getRemoteAddr(request)); |
| } |
| |
| protected String getRemoteAddr(HttpServletRequest request) |
| { |
| return request.getRemoteAddr(); |
| } |
| |
| private boolean hasCorrectSecurityToken(HttpServletRequest request) |
| { |
| return _shutdownToken.equals(request.getParameter("token")); |
| } |
| |
| private void shutdownServer() throws Exception |
| { |
| _server.stop(); |
| |
| if (_exitJvm) |
| { |
| System.exit(0); |
| } |
| } |
| |
| public void setExitJvm(boolean exitJvm) |
| { |
| this._exitJvm = exitJvm; |
| } |
| |
| } |