[927] | 1 | // Copyright 2012 Georg-August-Universität Göttingen, Germany |
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| 2 | // |
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| 3 | // Licensed under the Apache License, Version 2.0 (the "License"); |
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| 4 | // you may not use this file except in compliance with the License. |
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| 5 | // You may obtain a copy of the License at |
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| 6 | // |
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| 7 | // http://www.apache.org/licenses/LICENSE-2.0 |
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| 8 | // |
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| 9 | // Unless required by applicable law or agreed to in writing, software |
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| 10 | // distributed under the License is distributed on an "AS IS" BASIS, |
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| 11 | // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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| 12 | // See the License for the specific language governing permissions and |
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| 13 | // limitations under the License. |
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| 14 | |
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[857] | 15 | package de.ugoe.cs.autoquest.htmlmonitor; |
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| 16 | |
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[880] | 17 | import org.eclipse.jetty.servlets.CrossOriginFilter; |
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| 18 | import org.mortbay.jetty.Handler; |
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[857] | 19 | import org.mortbay.jetty.Server; |
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| 20 | import org.mortbay.jetty.servlet.Context; |
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[880] | 21 | import org.mortbay.jetty.servlet.FilterHolder; |
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[857] | 22 | import org.mortbay.jetty.servlet.ServletHolder; |
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| 23 | |
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| 24 | import de.ugoe.cs.util.console.Console; |
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| 25 | |
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| 26 | /** |
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[871] | 27 | * <p> |
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[879] | 28 | * this is the web server, that receives the client messages. It also provides the java script |
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| 29 | * that is used by the client via the URL /script/autoquest-htmlmonitor.js. It is initialized |
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| 30 | * with a port on which it shall listen, as well as a message listener to forward the received |
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| 31 | * messages to. Internally it starts a jetty web server with a single {@link HtmlMonitorServlet} |
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| 32 | * to receive the messages as well as a . |
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[871] | 33 | * </p> |
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[857] | 34 | * |
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| 35 | * @author Patrick Harms |
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| 36 | */ |
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| 37 | class HtmlMonitorServer implements HtmlMonitorComponent { |
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| 38 | |
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| 39 | /** |
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[871] | 40 | * the port to listen on |
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[857] | 41 | */ |
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| 42 | private int port; |
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| 43 | |
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| 44 | /** |
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[871] | 45 | * the jetty web server used for receiving messages |
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[857] | 46 | */ |
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| 47 | private Server server; |
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| 48 | |
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| 49 | /** |
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[871] | 50 | * the message listener to forward the messages to |
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[857] | 51 | */ |
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| 52 | private HtmlMonitorMessageListener messageListener; |
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| 53 | |
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| 54 | /** |
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| 55 | * <p> |
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[871] | 56 | * initializes the server with the port to listen on and the message listener to forward |
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| 57 | * the messages to. |
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[857] | 58 | * </p> |
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| 59 | * |
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[871] | 60 | * @param port the port to listen on |
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| 61 | * @param messageListener the message listener to forward the messages to |
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[857] | 62 | */ |
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| 63 | HtmlMonitorServer(int port, HtmlMonitorMessageListener messageListener) { |
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| 64 | this.port = port; |
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| 65 | this.messageListener = messageListener; |
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| 66 | } |
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| 67 | |
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| 68 | /* (non-Javadoc) |
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| 69 | * @see de.ugoe.cs.autoquest.htmlmonitor.HtmlMonitorComponent#init() |
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| 70 | */ |
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| 71 | @Override |
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| 72 | public synchronized void init() { |
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| 73 | if (server != null) { |
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| 74 | throw new IllegalStateException("already initialized. First call stop()"); |
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| 75 | } |
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| 76 | |
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| 77 | server = new Server(port); |
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[874] | 78 | |
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| 79 | /* |
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| 80 | // the following code can be used to support SSL directly |
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| 81 | server = new Server(); |
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| 82 | |
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| 83 | SslSocketConnector connector = new SslSocketConnector(); |
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| 84 | connector.setPort(port); |
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| 85 | connector.setKeystore("data/keystore"); |
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| 86 | connector.setPassword("123456"); |
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| 87 | connector.setKeyPassword("123456"); |
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| 88 | connector.setTruststore("data/keystore"); |
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| 89 | connector.setTrustPassword("123456"); |
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| 90 | server.addConnector(connector);*/ |
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| 91 | |
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[857] | 92 | Context root = new Context(server, "/", Context.SESSIONS); |
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| 93 | |
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| 94 | HtmlMonitorServlet servlet = new HtmlMonitorServlet(messageListener); |
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| 95 | ServletHolder servletHolder = new ServletHolder(servlet); |
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| 96 | root.addServlet(servletHolder, "/*"); |
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[880] | 97 | |
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| 98 | CrossOriginFilter filter = new CrossOriginFilter(); |
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| 99 | FilterHolder filterHolder = new FilterHolder(filter); |
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| 100 | filterHolder.setInitParameter("allowedOrigins", "*"); |
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| 101 | filterHolder.setInitParameter("allowedMethods", "GET,POST"); |
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| 102 | root.addFilter(filterHolder, "/*", Handler.ALL); |
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[857] | 103 | } |
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| 104 | |
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| 105 | /* (non-Javadoc) |
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| 106 | * @see de.ugoe.cs.autoquest.htmlmonitor.HtmlMonitorComponent#start() |
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| 107 | */ |
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| 108 | @Override |
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| 109 | public synchronized void start() throws HtmlMonitorException { |
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| 110 | if (server == null) { |
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| 111 | throw new IllegalStateException("server not initialized yet. First call init()"); |
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| 112 | } |
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| 113 | |
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| 114 | try { |
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| 115 | server.start(); |
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| 116 | } |
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| 117 | catch (Exception e) { |
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| 118 | throw new HtmlMonitorException("could not start server", e); |
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| 119 | } |
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| 120 | } |
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| 121 | |
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| 122 | |
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| 123 | /* (non-Javadoc) |
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| 124 | * @see de.ugoe.cs.autoquest.htmlmonitor.HtmlMonitorComponent#stop() |
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| 125 | */ |
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| 126 | @Override |
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| 127 | public synchronized void stop() { |
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| 128 | try { |
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| 129 | if (server != null) { |
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| 130 | server.stop(); |
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| 131 | } |
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| 132 | } |
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| 133 | catch (Exception e) { |
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| 134 | Console.printerrln("could not stop HTML monitor server: " + e.getMessage()); |
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| 135 | Console.logException(e); |
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| 136 | } |
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| 137 | } |
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| 138 | |
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| 139 | } |
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