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         public void addUpdateListener(UpdateListener updateListener) {
  90                 updateListeners.add(updateListener);
  91         }
  92
  93         public void removeUpdateListener(UpdateListener updateListener) {
  94                 updateListeners.remove(updateListener);
  95         }
  96
  97         protected void fireUpdateFound(Version foundVersion, long versionTimestamp) {
  98                 for (UpdateListener updateListener : updateListeners) {
  99                         updateListener.foundUpdateData(foundVersion, versionTimestamp);
 100                 }
 101         }
 102
 103         //
 104         // ACCESSORS
 105         //
 106
 107         /**
 108          * Returns the latest version that was found.
 109          *
 110          * @return The latest found version
 111          */
 112         public Version getLatestVersion() {
 113                 return lastVersion;
 114         }
 115
 116         //
 117         // ACTIONS
 118         //
 119
 120         public void start() {
 121                 new Thread(this).start();
 122         }
 123
 124         public void stop() {
 125                 synchronized (syncObject) {
 126                         shouldStop = true;
 127                         syncObject.notifyAll();
 128                 }
 129         }
 130
 131         //
 132         // PRIVATE METHODS
 133         //
 134
 135         private boolean shouldStop() {
 136                 synchronized (syncObject) {
 137                         return shouldStop;
 138                 }
 139         }
 140
 141         private String constructUpdateKey(int edition) {
 142                 return UPDATE_KEY + "/jSite/" + edition + "/jSite.properties";
 143         }
 144
 145         //
 146         // INTERFACE Runnable
 147         //
 148
 149         public void run() {
 150                 Connection connection = freenetInterface.getConnection("jSite-" + ++counter + "-UpdateChecker");
 151                 try {
 152                         connection.connect();
 153                 } catch (IOException e1) {
 154                         e1.printStackTrace();
 155                 }
 156                 Client client = new Client(connection);
 157                 boolean checkNow = false;
 158                 int currentEdition = lastUpdateEdition;
 159                 while (!shouldStop()) {
 160                         checkNow = false;
 161                         System.out.println("Trying " + constructUpdateKey(currentEdition));
 162                         ClientGet clientGet = new ClientGet("get-update-key");
 163                         clientGet.setUri(constructUpdateKey(currentEdition));
 164                         clientGet.setPersistence(Persistence.CONNECTION);
 165                         clientGet.setReturnType(ReturnType.direct);
 166                         clientGet.setVerbosity(Verbosity.ALL);
 167                         try {
 168                                 client.execute(clientGet);
 169                                 boolean stop = false;
 170                                 while (!stop) {
 171                                         Message message = client.readMessage();
 172                                         System.out.println(message);
 173                                         if ("GetFailed".equals(message.getName())) {
 174                                                 if ("27".equals(message.get("code"))) {
 175                                                         String editionString = message.get("redirecturi").split("/")[2];
 176                                                         int editionNumber = -1;
 177                                                         try {
 178                                                                 editionNumber = Integer.parseInt(editionString);
 179                                                         } catch (NumberFormatException nfe1) {
 180                                                                 /* ignore. */
 181                                                         }
 182                                                         if (editionNumber != -1) {
 183                                                                 System.out.println("Found new edition " + editionNumber);
 184                                                                 currentEdition = editionNumber;
 185                                                                 lastUpdateEdition = editionNumber;
 186                                                                 checkNow = true;
 187                                                                 break;
 188                                                         }
 189                                                 }
 190                                         }
 191                                         if ("AllData".equals(message.getName())) {
 192                                                 System.out.println("Update data found.");
 193                                                 InputStream dataInputStream = null;
 194                                                 Properties properties = new Properties();
 195                                                 try {
 196                                                         dataInputStream = message.getPayloadInputStream();
 197                                                         properties.load(dataInputStream);
 198                                                 } finally {
 199                                                         Closer.close(dataInputStream);
 200                                                 }
 201
 202                                                 String foundVersionString = properties.getProperty("jSite.Version");
 203                                                 if (foundVersionString != null) {
 204                                                         Version foundVersion = Version.parse(foundVersionString);
 205                                                         if (foundVersion != null) {
 206                                                                 lastVersion = foundVersion;
 207                                                                 String versionTimestampString = properties.getProperty("jSite.Date");
 208                                                                 System.out.println(versionTimestampString);
 209                                                                 long versionTimestamp = -1;
 210                                                                 try {
 211                                                                         versionTimestamp = Long.parseLong(versionTimestampString);
 212                                                                 } catch (NumberFormatException nfe1) {
 213                                                                         /* ignore. */
 214                                                                 }
 215                                                                 fireUpdateFound(foundVersion, versionTimestamp);
 216                                                                 stop = true;
 217                                                                 checkNow = true;
 218                                                                 ++currentEdition;
 219                                                         }
 220                                                 }
 221                                         }
 222                                 }
 223                         } catch (IOException e) {
 224                                 System.out.println("Got IOException: " + e.getMessage());
 225                                 e.printStackTrace();
 226                         }
 227                         if (!checkNow && !shouldStop()) {
 228                                 synchronized (syncObject) {
 229                                         try {
 230                                                 syncObject.wait(15 * 60 * 1000);
 231                                         } catch (InterruptedException ie1) {
 232                                                 /* ignore. */
 233                                         }
 234                                 }
 235                         }
 236                 }
 237         }
 238 }