[919] | 1 | /**
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| 2 | * FrameShare.java
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| 3 | * Copyright (C) 2010 New Zealand Digital Library, http://expeditee.org
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| 4 | *
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| 5 | * This program is free software: you can redistribute it and/or modify
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| 6 | * it under the terms of the GNU General Public License as published by
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| 7 | * the Free Software Foundation, either version 3 of the License, or
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| 8 | * (at your option) any later version.
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| 9 | *
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| 10 | * This program is distributed in the hope that it will be useful,
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| 11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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| 13 | * GNU General Public License for more details.
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| 14 | *
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| 15 | * You should have received a copy of the GNU General Public License
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| 16 | * along with this program. If not, see <http://www.gnu.org/licenses/>.
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| 17 | */
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| 18 |
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[286] | 19 | package org.expeditee.network;
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| 20 |
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[298] | 21 | import java.io.BufferedReader;
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[838] | 22 | import java.io.File;
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[298] | 23 | import java.io.IOException;
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[838] | 24 | import java.io.InputStream;
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[843] | 25 | import java.io.OutputStream;
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[298] | 26 | import java.io.StringReader;
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[306] | 27 | import java.io.StringWriter;
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[298] | 28 | import java.net.DatagramPacket;
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| 29 | import java.net.DatagramSocket;
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[306] | 30 | import java.net.InetAddress;
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[838] | 31 | import java.net.Socket;
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[307] | 32 | import java.net.SocketException;
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[298] | 33 | import java.net.UnknownHostException;
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[856] | 34 | import java.nio.charset.Charset;
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[306] | 35 | import java.util.Collection;
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[286] | 36 | import java.util.HashMap;
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[306] | 37 | import java.util.LinkedList;
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[843] | 38 | import java.util.List;
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[286] | 39 | import java.util.Map;
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| 40 |
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| 41 | import org.expeditee.gui.AttributeValuePair;
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| 42 | import org.expeditee.gui.Frame;
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[306] | 43 | import org.expeditee.gui.FrameIO;
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[286] | 44 | import org.expeditee.gui.MessageBay;
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[298] | 45 | import org.expeditee.io.ExpReader;
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[306] | 46 | import org.expeditee.io.ExpWriter;
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[298] | 47 | import org.expeditee.io.FrameReader;
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[306] | 48 | import org.expeditee.io.FrameWriter;
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[843] | 49 | import org.expeditee.items.Item;
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| 50 | import org.expeditee.items.Picture;
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[286] | 51 | import org.expeditee.items.Text;
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[732] | 52 | import org.expeditee.settings.network.NetworkSettings;
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[286] | 53 |
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[298] | 54 | public class FrameShare {
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[286] | 55 |
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[856] | 56 | public final static Charset CHARSET = Charset.forName("UTF-8");
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| 57 |
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[311] | 58 | public static boolean disableNetworking = false;
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[286] | 59 |
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[306] | 60 | private static Collection<DefaultServer> _servers = new LinkedList<DefaultServer>();
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[286] | 61 |
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[306] | 62 | private static FrameShare _theSession;
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[878] | 63 |
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| 64 | private static boolean headless = false;
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[306] | 65 |
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[298] | 66 | private Map<String, Peer> _peers;
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[286] | 67 |
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[307] | 68 | private int _port = Peer.DEFAULT_PORT;
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[306] | 69 |
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[286] | 70 |
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[648] | 71 | private void startServers() throws IOException
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| 72 | {
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[649] | 73 | System.err.println("Starting Expeditee Server on port " + _port);
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[648] | 74 | _servers.add(new FrameServer(_port));
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| 75 | _servers.add(new FrameSaver(_port));
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| 76 | _servers.add(new MessageReciever(_port));
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| 77 | _servers.add(new InfServer(_port));
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| 78 | _servers.add(new InfUpdate(_port));
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[838] | 79 | _servers.add(new ImageServer(_port));
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| 80 | _servers.add(new ImageSaver(_port));
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[648] | 81 |
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[286] | 82 | }
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| 83 |
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[648] | 84 | private FrameShare() {
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[298] | 85 | _peers = new HashMap<String, Peer>();
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[648] | 86 | }
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[286] | 87 |
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[648] | 88 | private FrameShare(int port) {
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[843] | 89 | this();
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[648] | 90 | _port = port;
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| 91 |
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| 92 | try {
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| 93 | startServers();
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| 94 |
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| 95 | } catch (Exception e) {
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| 96 | e.printStackTrace();
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| 97 | System.err.println("Could not start servers [port: "
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| 98 | + port + "]");
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| 99 | }
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| 100 |
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[649] | 101 | try {
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| 102 | for (DefaultServer server : _servers) {
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| 103 | server.start();
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| 104 | }
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| 105 | } catch (Exception e) {
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| 106 | System.err.println("Error in server startup");
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| 107 | }
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[648] | 108 | }
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| 109 |
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| 110 |
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| 111 | private FrameShare(Frame settingsFrame)
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| 112 | {
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| 113 | this();
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| 114 |
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[286] | 115 | // Set the settings
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| 116 | for (Text item : settingsFrame.getBodyTextItems(false)) {
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[305] | 117 |
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[298] | 118 | AttributeValuePair avp = new AttributeValuePair(item.getText());
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[305] | 119 | if (avp.isAnnotation())
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| 120 | continue;
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[298] | 121 |
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[305] | 122 | String attribute = avp.getAttributeOrValue().toLowerCase();
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| 123 |
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| 124 | if (attribute.equals("server")) {
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[298] | 125 | try {
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[307] | 126 | if (avp.hasPair()) {
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[306] | 127 | _port = avp.getIntegerValue();
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[298] | 128 | }
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[502] | 129 | MessageBay.displayMessage("Starting Expeditee Server on port: " + _port);
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| 130 |
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[648] | 131 | startServers();
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[298] | 132 | } catch (Exception e) {
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| 133 | e.printStackTrace();
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[306] | 134 | MessageBay.errorMessage("Could not start servers ["
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[298] | 135 | + avp.toString() + "]");
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| 136 | }
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[286] | 137 | continue;
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| 138 | }
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[298] | 139 |
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[286] | 140 | if (!avp.hasPair())
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| 141 | continue;
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[298] | 142 |
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| 143 | try {
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[502] | 144 | Peer peer = new Peer(avp);
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| 145 | _peers.put(attribute, peer);
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[298] | 146 | } catch (UnknownHostException e) {
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| 147 | MessageBay.errorMessage("Could not locate peer ["
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| 148 | + avp.toString() + "]");
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| 149 | }
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[286] | 150 | }
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| 151 |
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| 152 | try {
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[649] | 153 | for (DefaultServer server : _servers) {
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[306] | 154 | server.start();
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[649] | 155 | }
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[286] | 156 | } catch (Exception e) {
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| 157 | MessageBay.errorMessage("Error in PeerToPeer setup");
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| 158 | }
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| 159 | }
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[305] | 160 |
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[298] | 161 | public void finalise() {
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[649] | 162 | System.err.println("Closing servers");
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| 163 |
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[306] | 164 | for (DefaultServer server : _servers)
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| 165 | server.close();
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[298] | 166 | }
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[286] | 167 |
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[298] | 168 | public static FrameShare getInstance() {
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| 169 | return _theSession;
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| 170 | }
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| 171 |
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[286] | 172 | /**
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[298] | 173 | * TODO check each peer on a different thread.
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| 174 | *
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| 175 | * @param frameName
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| 176 | * @return
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[286] | 177 | */
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[307] | 178 | public Frame loadFrame(String frameName, String peerName) {
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| 179 | String result = null;
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[298] | 180 |
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| 181 | try {
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| 182 | // get a datagram socket
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| 183 | DatagramSocket socket = new DatagramSocket();
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[732] | 184 | socket.setSoTimeout(NetworkSettings.FrameShareTimeout.get() * 2);
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[307] | 185 | if (peerName == null) {
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| 186 | for (Peer peer : _peers.values()) {
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| 187 | try {
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| 188 | result = getFrameContents(frameName, socket, peer);
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[502] | 189 | if(result == null || result.length() == 0) {
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[307] | 190 | continue;
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[502] | 191 | }
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[307] | 192 | peerName = peer.getName();
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| 193 | break;
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| 194 | } catch (Exception e) {
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| 195 | e.printStackTrace();
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| 196 | }
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| 197 | }
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| 198 | } else {
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[298] | 199 | try {
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[307] | 200 | Peer peer = _peers.get(peerName.toLowerCase());
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| 201 | if (peer != null) {
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| 202 | result = getFrameContents(frameName, socket, peer);
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| 203 | }
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[298] | 204 | } catch (Exception e) {
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[305] | 205 | e.printStackTrace();
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[298] | 206 | }
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| 207 | }
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| 208 | socket.close();
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| 209 | } catch (Exception e) {
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[502] | 210 | e.printStackTrace();
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[286] | 211 | }
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[306] | 212 |
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[307] | 213 | if (result == null || result.length() == 0)
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[305] | 214 | return null;
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[306] | 215 |
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[298] | 216 | // Now read the frame from the file contents
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| 217 | FrameReader reader = new ExpReader(frameName);
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| 218 | Frame frame = null;
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| 219 | try {
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| 220 | frame = reader.readFrame(new BufferedReader(
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| 221 | new StringReader(result)));
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| 222 | // Set the path for the frame to indicate it is NOT a local frame
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| 223 | // This allows the frame to be saved in the correct location
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| 224 | frame.setLocal(false);
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| 225 | frame.setPath(peerName);
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| 226 | } catch (IOException e) {
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| 227 | e.printStackTrace();
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| 228 | }
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[286] | 229 |
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[298] | 230 | if (frame == null) {
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| 231 | MessageBay.errorMessage("Error: " + frameName
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| 232 | + " could not be successfully loaded.");
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| 233 | return null;
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[286] | 234 | }
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[298] | 235 |
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| 236 | return frame;
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[286] | 237 | }
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[838] | 238 |
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| 239 | /**
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| 240 | * Downloads an image from the server (if it exists),
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| 241 | * Saves it locally in the default image folder,
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| 242 | * Then returns the filename
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| 243 | *
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| 244 | * @param imageName
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| 245 | * @param peerName
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| 246 | * @return true if the image was successfully downloaded and saved in the default images folder
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| 247 | */
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| 248 | public boolean loadImage(String imageName, String peerName) {
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| 249 | boolean result = false;
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| 250 | try {
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| 251 | if (peerName == null) {
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| 252 | for (Peer peer : _peers.values()) {
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| 253 | try {
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| 254 | result = getImage(imageName, peer);
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| 255 | if(!result) {
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| 256 | continue;
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| 257 | }
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| 258 | peerName = peer.getName();
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| 259 | break;
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| 260 | } catch (Exception e) {
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| 261 | e.printStackTrace();
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| 262 | }
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| 263 | }
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| 264 | } else {
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| 265 | try {
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| 266 | Peer peer = _peers.get(peerName.toLowerCase());
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| 267 | if (peer != null) {
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| 268 | result = getImage(imageName, peer);
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| 269 | }
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| 270 | } catch (Exception e) {
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| 271 | e.printStackTrace();
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| 272 | }
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| 273 | }
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| 274 | } catch(Exception e) {
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| 275 | e.printStackTrace();
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| 276 | }
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| 277 | return result;
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| 278 | }
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| 279 |
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| 280 | /**
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[843] | 281 | * Send a list of images that may need to be uploaded
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| 282 | * Then wait for a response (in form of a list of shorts denoting which files to keep)
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| 283 | * Then send each file in sequence
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| 284 | * @author jts21
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| 285 | *
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[838] | 286 | */
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[843] | 287 | private class ImageSender extends Thread {
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[838] | 288 |
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[843] | 289 | private List<File> imageFiles;
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| 290 | private Peer peer;
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| 291 |
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| 292 | public ImageSender(List<File> imageFiles, Peer peer) {
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| 293 | super("ImageSender");
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| 294 | this.imageFiles = imageFiles;
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| 295 | this.peer = peer;
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| 296 | }
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| 297 |
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| 298 | @Override
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| 299 | public void run() {
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[849] | 300 | // System.out.println("Sending images to server");
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[843] | 301 | try(Socket socket = new Socket(peer.getAddress(), peer.getPort() + ImageSaver.OFFSET)) {
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| 302 | socket.setSoTimeout(NetworkSettings.FrameShareTimeout.get() * 2);
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| 303 | OutputStream os = socket.getOutputStream();
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| 304 | // send the list of filenames to the server
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| 305 | int numFiles = imageFiles.size();
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[849] | 306 | if(numFiles > 0xFFFF) {
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[843] | 307 | throw new Exception("Too many images on the frame");
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| 308 | }
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[849] | 309 | os.write((byte) ((numFiles >> 8) & 0xFF));
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[843] | 310 | os.write((byte) (numFiles & 0xFF));
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| 311 | // send the list of different files
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| 312 | for(File f : imageFiles) {
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| 313 | byte[] fileName = f.getName().getBytes();
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| 314 | int fileNameLen = fileName.length;
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| 315 | if(fileNameLen > 255) {
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| 316 | throw new Exception("Filename too long");
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| 317 | }
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| 318 | os.write((byte) ((fileNameLen) & 0xFF));
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| 319 | os.write(fileName);
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| 320 | }
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| 321 | // the server sends indices of files it wants, send their data
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| 322 | InputStream is = socket.getInputStream();
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| 323 | int i = -1;
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| 324 | while((i = is.read()) != -1 && i < imageFiles.size()) {
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| 325 | File f = imageFiles.get(i);
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[849] | 326 | // System.out.println("... sending " + f.getName());
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[843] | 327 | ImageServer.sendImage(f, socket);
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| 328 | }
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| 329 | } catch(Exception e) {
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| 330 | e.printStackTrace();
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| 331 | }
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| 332 | }
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[838] | 333 | }
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| 334 |
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| 335 | private boolean getImage(String imageName, Peer peer) throws IOException {
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| 336 | try(Socket socket = new Socket(peer.getAddress(), peer.getPort() + ImageServer.OFFSET)) {
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| 337 | socket.setSoTimeout(NetworkSettings.FrameShareTimeout.get() * 2);
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[856] | 338 | byte[] fileName = imageName.getBytes(FrameShare.CHARSET);
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[838] | 339 | int fileNameLen = fileName.length;
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[843] | 340 | OutputStream os = socket.getOutputStream();
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| 341 | os.write((byte) ((fileNameLen) & 0xFF));
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| 342 | os.write(fileName);
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| 343 | os.flush();
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| 344 | boolean ret = ImageSaver.recvImage(new File(FrameIO.IMAGES_PATH + imageName), socket);
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[838] | 345 | socket.close();
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[843] | 346 | return ret;
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[838] | 347 | } catch(Exception e) {
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| 348 | e.printStackTrace();
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| 349 | return false;
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| 350 | }
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| 351 | }
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[306] | 352 |
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[307] | 353 | /**
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| 354 | * @param frameName
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| 355 | * @param socket
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| 356 | * @param peer
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| 357 | * @return
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| 358 | * @throws IOException
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| 359 | */
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| 360 | private String getFrameContents(String frameName, DatagramSocket socket, Peer peer) throws IOException {
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| 361 | byte[] nameBuf = frameName.getBytes();
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| 362 | byte[] buf = new byte[FrameServer.MAX_PACKET_LENGTH];
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| 363 | // send request for a frame
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| 364 | DatagramPacket packet = new DatagramPacket(nameBuf,
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| 365 | nameBuf.length, peer.getAddress(), peer
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| 366 | .getPort());
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| 367 | socket.send(packet);
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| 368 |
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| 369 | // get response
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| 370 | packet = new DatagramPacket(buf, buf.length);
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| 371 | socket.receive(packet);
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| 372 |
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| 373 | // store frame contents
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[856] | 374 | return new String(packet.getData(), 0, packet.getLength(), FrameShare.CHARSET);
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[307] | 375 | }
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| 376 |
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[306] | 377 | public boolean sendMessage(String message, String peerName) {
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| 378 | Peer peer = _peers.get(peerName.toLowerCase());
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[307] | 379 |
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| 380 | if (peer == null) {
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[306] | 381 | return false;
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| 382 | }
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| 383 |
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| 384 | try {
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| 385 | // get a datagram socket
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| 386 | DatagramSocket socket = new DatagramSocket(_port - 1);
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[732] | 387 | socket.setSoTimeout(NetworkSettings.FrameShareTimeout.get());
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[306] | 388 |
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| 389 | // message = peerName + " says " + message;
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| 390 | byte[] contentsBuf = message.getBytes();
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| 391 |
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| 392 | try {
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| 393 | // send save request
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| 394 | DatagramPacket packet = new DatagramPacket(contentsBuf,
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[307] | 395 | contentsBuf.length, peer.getAddress(), peer.getPort()
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| 396 | + MessageReciever.OFFSET);
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[306] | 397 | socket.send(packet);
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| 398 | } catch (Exception e) {
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| 399 | e.printStackTrace();
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| 400 | }
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| 401 | socket.close();
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| 402 |
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| 403 | } catch (IOException e) {
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| 404 | e.printStackTrace();
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| 405 | }
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| 406 | return true;
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| 407 | }
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| 408 |
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| 409 | public String saveFrame(Frame toSave) {
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[307] | 410 |
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[306] | 411 | FrameIO.setSavedProperties(toSave);
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[307] | 412 |
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[306] | 413 | Peer peer = _peers.get(toSave.getPath().toLowerCase());
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[843] | 414 |
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| 415 | List<File> imageFiles = new LinkedList<File>();
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[1415] | 416 | for(Item i : toSave.getSortedItems()) {
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[843] | 417 | if(i instanceof Picture) {
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| 418 | ((Picture) i).moveToImagesFolder();
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| 419 | File f = new File(((Picture) i).getPath());
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| 420 | if(f != null && f.isFile() && !imageFiles.contains(f)) {
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| 421 | imageFiles.add(f);
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| 422 | }
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| 423 | }
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| 424 | }
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| 425 | new ImageSender(imageFiles, peer).start();
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| 426 |
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[306] | 427 | String fileContents = "";
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| 428 | // Now read the frame from the file contents
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| 429 | FrameWriter writer = new ExpWriter();
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| 430 | try {
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| 431 | // String tempName = new Date().toString() + ".exp";
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| 432 | // writer.setOutputLocation(tempName);
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| 433 | // Write out the file to a StringBuffer
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| 434 | StringWriter sw = new StringWriter();
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| 435 | // First write out the name of the frame
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| 436 | sw.write(toSave.getName() + "\n");
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[307] | 437 | // Then the version
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[306] | 438 | sw.write(toSave.getVersion() + "\n");
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| 439 | // Write out the rest of the frame
|
---|
| 440 | writer.writeFrame(toSave, sw);
|
---|
| 441 | // Now send the packet
|
---|
| 442 | fileContents = sw.getBuffer().toString();
|
---|
[856] | 443 | byte[] contentsBuf = fileContents.getBytes(FrameShare.CHARSET);
|
---|
[306] | 444 |
|
---|
| 445 | // get a datagram socket
|
---|
| 446 | DatagramSocket socket = new DatagramSocket(_port - 2);
|
---|
[732] | 447 | socket.setSoTimeout(NetworkSettings.FrameShareTimeout.get());
|
---|
[306] | 448 |
|
---|
| 449 | try {
|
---|
| 450 | // send save request
|
---|
| 451 | DatagramPacket packet = new DatagramPacket(contentsBuf,
|
---|
[307] | 452 | contentsBuf.length, peer.getAddress(), peer.getPort()
|
---|
| 453 | + FrameSaver.OFFSET);
|
---|
[306] | 454 | socket.send(packet);
|
---|
| 455 | } catch (Exception e) {
|
---|
| 456 | e.printStackTrace();
|
---|
| 457 | }
|
---|
| 458 | socket.close();
|
---|
| 459 |
|
---|
| 460 | } catch (IOException e) {
|
---|
| 461 | e.printStackTrace();
|
---|
| 462 | }
|
---|
| 463 | toSave.setSaved();
|
---|
| 464 | return fileContents;
|
---|
| 465 | }
|
---|
| 466 |
|
---|
| 467 | public String getPeerName(int port, InetAddress address) {
|
---|
| 468 | for (Peer p : _peers.values()) {
|
---|
[307] | 469 | if (p.getPort() == port && p.getAddress().equals(address))
|
---|
[306] | 470 | return p.getName();
|
---|
| 471 | }
|
---|
| 472 | return null;
|
---|
| 473 | }
|
---|
[307] | 474 |
|
---|
| 475 | public int getInfNumber(String peerName, String frameset, boolean update)
|
---|
| 476 | throws IOException {
|
---|
| 477 | int result = -1;
|
---|
| 478 | // get a datagram socket
|
---|
| 479 | DatagramSocket socket = null;
|
---|
| 480 | try {
|
---|
| 481 | socket = new DatagramSocket(_port - 3);
|
---|
[732] | 482 | socket.setSoTimeout(NetworkSettings.FrameShareTimeout.get());
|
---|
[307] | 483 |
|
---|
| 484 | byte[] contentsBuf = frameset.getBytes();
|
---|
| 485 | Peer peer = _peers.get(peerName.toLowerCase());
|
---|
[751] | 486 | if(peer != null) {
|
---|
| 487 | try {
|
---|
| 488 | // send inf request
|
---|
| 489 | DatagramPacket packet = new DatagramPacket(
|
---|
| 490 | contentsBuf,
|
---|
| 491 | contentsBuf.length,
|
---|
| 492 | peer.getAddress(),
|
---|
| 493 | peer.getPort()
|
---|
| 494 | + (update ? InfUpdate.OFFSET : InfServer.OFFSET));
|
---|
| 495 | socket.send(packet);
|
---|
| 496 |
|
---|
| 497 | byte[] buf = new byte[100];
|
---|
| 498 | // get response
|
---|
| 499 | packet = new DatagramPacket(buf, buf.length);
|
---|
| 500 | socket.receive(packet);
|
---|
| 501 |
|
---|
| 502 | // store frame contents
|
---|
| 503 | result = Integer.parseInt(new String(packet.getData(), 0,
|
---|
| 504 | packet.getLength()));
|
---|
| 505 | peerName = peer.getName();
|
---|
| 506 |
|
---|
| 507 | } catch (Exception e) {
|
---|
| 508 | e.printStackTrace();
|
---|
| 509 | }
|
---|
[307] | 510 | }
|
---|
| 511 | socket.close();
|
---|
| 512 | } catch (SocketException e1) {
|
---|
| 513 | e1.printStackTrace();
|
---|
| 514 | }
|
---|
| 515 |
|
---|
| 516 | return result;
|
---|
| 517 | }
|
---|
[648] | 518 |
|
---|
| 519 | public static void init(Frame settingsFrame) {
|
---|
| 520 | if (disableNetworking || settingsFrame == null)
|
---|
| 521 | return;
|
---|
| 522 |
|
---|
| 523 | if (_theSession == null)
|
---|
| 524 | _theSession = new FrameShare(settingsFrame);
|
---|
| 525 | }
|
---|
| 526 |
|
---|
| 527 | public static void init(int port) {
|
---|
| 528 |
|
---|
| 529 | if (_theSession == null) {
|
---|
| 530 | _theSession = new FrameShare(port);
|
---|
| 531 | }
|
---|
| 532 | }
|
---|
[878] | 533 |
|
---|
| 534 | public static void restart() {
|
---|
| 535 | if(_theSession != null) {
|
---|
| 536 | _theSession.finalise();
|
---|
| 537 | _theSession = new FrameShare(_theSession._port);
|
---|
| 538 | }
|
---|
| 539 | }
|
---|
| 540 |
|
---|
| 541 | public static boolean isHeadless() {
|
---|
| 542 | return headless;
|
---|
| 543 | }
|
---|
[648] | 544 |
|
---|
| 545 |
|
---|
| 546 | /**
|
---|
| 547 | * Start a server running on the port number supplied on the command line
|
---|
| 548 | *
|
---|
| 549 | * @param args
|
---|
| 550 | */
|
---|
| 551 | public static void main(String[] args) {
|
---|
| 552 |
|
---|
| 553 | if (args.length != 1) {
|
---|
| 554 |
|
---|
[843] | 555 | // Work out the 'program name' (i.e. this class), but done in a general
|
---|
| 556 | // way in case class name is changed at a later date
|
---|
| 557 | StackTraceElement[] stack = Thread.currentThread ().getStackTrace ();
|
---|
| 558 | StackTraceElement main = stack[stack.length - 1];
|
---|
| 559 | String mainClass = main.getClassName ();
|
---|
| 560 |
|
---|
| 561 | System.err.println("Usage: java " + mainClass + " port-number");
|
---|
| 562 | System.exit(1);
|
---|
[648] | 563 | }
|
---|
| 564 |
|
---|
[843] | 565 | MessageBay.suppressMessages(true);
|
---|
| 566 |
|
---|
[648] | 567 | String port_str = args[0];
|
---|
[878] | 568 |
|
---|
| 569 | FrameShare.headless = true;
|
---|
[648] | 570 |
|
---|
| 571 | try {
|
---|
[843] | 572 | int port = Integer.parseInt(port_str);
|
---|
| 573 |
|
---|
| 574 | init(port);
|
---|
[648] | 575 | }
|
---|
| 576 | catch (Exception e) {
|
---|
| 577 | e.printStackTrace();
|
---|
| 578 | System.exit(2);
|
---|
| 579 | }
|
---|
| 580 |
|
---|
| 581 | }
|
---|
| 582 |
|
---|
[286] | 583 | }
|
---|