src/de/todesbaum/jsite/gui/UpdateChecker.java

   1 /*
   2  * jSite-remote - UpdateChecker.java -
   3  * Copyright © 2008 David Roden
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program; if not, write to the Free Software
  17  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  18  */
  19
  20 package de.todesbaum.jsite.gui;
  21
  22 import java.io.IOException;
  23 import java.io.InputStream;
  24 import java.util.ArrayList;
  25 import java.util.List;
  26 import java.util.Properties;
  27
  28 import de.todesbaum.jsite.application.Freenet7Interface;
  29 import de.todesbaum.jsite.main.Main;
  30 import de.todesbaum.jsite.main.Version;
  31 import de.todesbaum.util.freenet.fcp2.Client;
  32 import de.todesbaum.util.freenet.fcp2.ClientGet;
  33 import de.todesbaum.util.freenet.fcp2.Connection;
  34 import de.todesbaum.util.freenet.fcp2.Message;
  35 import de.todesbaum.util.freenet.fcp2.Persistence;
  36 import de.todesbaum.util.freenet.fcp2.ReturnType;
  37 import de.todesbaum.util.freenet.fcp2.Verbosity;
  38 import de.todesbaum.util.io.Closer;
  39
  40 /**
  41  * Checks for newer versions of jSite.
  42  *
  43  * @author David ‘Bombe’ Roden &lt;bombe@freenetproject.org&gt;
  44  */
  45 public class UpdateChecker implements Runnable {
  46
  47         /** Counter for connection names. */
  48         private static int counter = 0;
  49
  50         /** The edition for the update check URL. */
  51         private static final int UPDATE_EDITION = 0;
  52
  53         /** The URL for update checks. */
  54         private static final String UPDATE_KEY = "USK@e3myoFyp5avg6WYN16ImHri6J7Nj8980Fm~aQe4EX1U,QvbWT0ImE0TwLODTl7EoJx2NBnwDxTbLTE6zkB-eGPs,AQACAAE";
  55
  56         /** Object used for synchronization. */
  57         private final Object syncObject = new Object();
  58
  59         /** Update listeners. */
  60         private final List<UpdateListener> updateListeners = new ArrayList<UpdateListener>();
  61
  62         /** Whether the main thread should stop. */
  63         private boolean shouldStop = false;
  64
  65         /** Current last found edition of update key. */
  66         private int lastUpdateEdition = UPDATE_EDITION;
  67
  68         /** Last found version. */
  69         private Version lastVersion = Main.getVersion();
  70
  71         /** The freenet interface. */
  72         private final Freenet7Interface freenetInterface;
  73
  74         /**
  75          * Creates a new update checker that uses the given frame as its parent and
  76          * communications via the given freenet interface.
  77          *
  78          * @param freenetInterface
  79          *            The freenet interface
  80          */
  81         public UpdateChecker(Freenet7Interface freenetInterface) {
  82                 this.freenetInterface = freenetInterface;
  83         }
  84
  85         //
  86         // EVENT LISTENER MANAGEMENT
  87         //
  88
  89         /**
  90          * Adds an update listener to the list of registered listeners.
  91          *
  92          * @param updateListener
  93          *            The update listener to add
  94          */
  95         public void addUpdateListener(UpdateListener updateListener) {
  96                 updateListeners.add(updateListener);
  97         }
  98
  99         /**
 100          * Removes the given listener from the list of registered listeners.
 101          *
 102          * @param updateListener
 103          *            The update listener to remove
 104          */
 105         public void removeUpdateListener(UpdateListener updateListener) {
 106                 updateListeners.remove(updateListener);
 107         }
 108
 109         /**
 110          * Notifies all listeners that a version was found.
 111          *
 112          * @param foundVersion
 113          *            The version that was found
 114          * @param versionTimestamp
 115          *            The timestamp of the version
 116          */
 117         protected void fireUpdateFound(Version foundVersion, long versionTimestamp) {
 118                 for (UpdateListener updateListener : updateListeners) {
 119                         updateListener.foundUpdateData(foundVersion, versionTimestamp);
 120                 }
 121         }
 122
 123         //
 124         // ACCESSORS
 125         //
 126
 127         /**
 128          * Returns the latest version that was found.
 129          *
 130          * @return The latest found version
 131          */
 132         public Version getLatestVersion() {
 133                 return lastVersion;
 134         }
 135
 136         //
 137         // ACTIONS
 138         //
 139
 140         /**
 141          * Starts the update checker.
 142          */
 143         public void start() {
 144                 new Thread(this).start();
 145         }
 146
 147         /**
 148          * Stops the update checker.
 149          */
 150         public void stop() {
 151                 synchronized (syncObject) {
 152                         shouldStop = true;
 153                         syncObject.notifyAll();
 154                 }
 155         }
 156
 157         //
 158         // PRIVATE METHODS
 159         //
 160
 161         /**
 162          * Returns whether the update checker should stop.
 163          *
 164          * @return <code>true</code> if the update checker should stop,
 165          *         <code>false</code> otherwise
 166          */
 167         private boolean shouldStop() {
 168                 synchronized (syncObject) {
 169                         return shouldStop;
 170                 }
 171         }
 172
 173         /**
 174          * Creates the URI of the update file for the given edition.
 175          *
 176          * @param edition
 177          *            The edition number
 178          * @return The URI for the update file for the given edition
 179          */
 180         private String constructUpdateKey(int edition) {
 181                 return UPDATE_KEY + "/jSite/" + edition + "/jSite.properties";
 182         }
 183
 184         //
 185         // INTERFACE Runnable
 186         //
 187
 188         /**
 189          * {@inheritDoc}
 190          */
 191         public void run() {
 192                 Connection connection = freenetInterface.getConnection("jSite-" + ++counter + "-UpdateChecker");
 193                 try {
 194                         connection.connect();
 195                 } catch (IOException e1) {
 196                         e1.printStackTrace();
 197                 }
 198                 Client client = new Client(connection);
 199                 boolean checkNow = false;
 200                 int currentEdition = lastUpdateEdition;
 201                 while (!shouldStop()) {
 202                         checkNow = false;
 203                         System.out.println("Trying " + constructUpdateKey(currentEdition));
 204                         ClientGet clientGet = new ClientGet("get-update-key");
 205                         clientGet.setUri(constructUpdateKey(currentEdition));
 206                         clientGet.setPersistence(Persistence.CONNECTION);
 207                         clientGet.setReturnType(ReturnType.direct);
 208                         clientGet.setVerbosity(Verbosity.ALL);
 209                         try {
 210                                 client.execute(clientGet);
 211                                 boolean stop = false;
 212                                 while (!stop) {
 213                                         Message message = client.readMessage();
 214                                         System.out.println(message);
 215                                         if ("GetFailed".equals(message.getName())) {
 216                                                 if ("27".equals(message.get("code"))) {
 217                                                         String editionString = message.get("redirecturi").split("/")[2];
 218                                                         int editionNumber = -1;
 219                                                         try {
 220                                                                 editionNumber = Integer.parseInt(editionString);
 221                                                         } catch (NumberFormatException nfe1) {
 222                                                                 /* ignore. */
 223                                                         }
 224                                                         if (editionNumber != -1) {
 225                                                                 System.out.println("Found new edition " + editionNumber);
 226                                                                 currentEdition = editionNumber;
 227                                                                 lastUpdateEdition = editionNumber;
 228                                                                 checkNow = true;
 229                                                                 break;
 230                                                         }
 231                                                 }
 232                                         }
 233                                         if ("AllData".equals(message.getName())) {
 234                                                 System.out.println("Update data found.");
 235                                                 InputStream dataInputStream = null;
 236                                                 Properties properties = new Properties();
 237                                                 try {
 238                                                         dataInputStream = message.getPayloadInputStream();
 239                                                         properties.load(dataInputStream);
 240                                                 } finally {
 241                                                         Closer.close(dataInputStream);
 242                                                 }
 243
 244                                                 String foundVersionString = properties.getProperty("jSite.Version");
 245                                                 if (foundVersionString != null) {
 246                                                         Version foundVersion = Version.parse(foundVersionString);
 247                                                         if (foundVersion != null) {
 248                                                                 lastVersion = foundVersion;
 249                                                                 String versionTimestampString = properties.getProperty("jSite.Date");
 250                                                                 System.out.println(versionTimestampString);
 251                                                                 long versionTimestamp = -1;
 252                                                                 try {
 253                                                                         versionTimestamp = Long.parseLong(versionTimestampString);
 254                                                                 } catch (NumberFormatException nfe1) {
 255                                                                         /* ignore. */
 256                                                                 }
 257                                                                 fireUpdateFound(foundVersion, versionTimestamp);
 258                                                                 stop = true;
 259                                                                 checkNow = true;
 260                                                                 ++currentEdition;
 261                                                         }
 262                                                 }
 263                                         }
 264                                 }
 265                         } catch (IOException e) {
 266                                 System.out.println("Got IOException: " + e.getMessage());
 267                                 e.printStackTrace();
 268                         }
 269                         if (!checkNow && !shouldStop()) {
 270                                 synchronized (syncObject) {
 271                                         try {
 272                                                 syncObject.wait(15 * 60 * 1000);
 273                                         } catch (InterruptedException ie1) {
 274                                                 /* ignore. */
 275                                         }
 276                                 }
 277                         }
 278                 }
 279         }
 280
 281 }