src/be/nikiroo/fanfix/library/RemoteLibraryServer.java

   1 package be.nikiroo.fanfix.library;
   2
   3 import java.io.IOException;
   4 import java.net.URL;
   5 import java.util.ArrayList;
   6 import java.util.Date;
   7 import java.util.List;
   8
   9 import javax.net.ssl.SSLException;
  10
  11 import be.nikiroo.fanfix.Instance;
  12 import be.nikiroo.fanfix.data.Chapter;
  13 import be.nikiroo.fanfix.data.MetaData;
  14 import be.nikiroo.fanfix.data.Paragraph;
  15 import be.nikiroo.fanfix.data.Story;
  16 import be.nikiroo.utils.Progress;
  17 import be.nikiroo.utils.Progress.ProgressListener;
  18 import be.nikiroo.utils.StringUtils;
  19 import be.nikiroo.utils.serial.server.ConnectActionServerObject;
  20 import be.nikiroo.utils.serial.server.ServerObject;
  21
  22 /**
  23  * Create a new remote server that will listen for orders on the given port.
  24  * <p>
  25  * The available commands are given as arrays of objects (first item is the
  26  * command, the rest are the arguments).
  27  * <p>
  28  * <ul>
  29  * <li>PING: will return PONG if the key is accepted</li>
  30  * <li>GET_METADATA *: will return the metadata of all the stories in the
  31  * library (array)</li> *
  32  * <li>GET_METADATA [luid]: will return the metadata of the story of LUID luid</li>
  33  * <li>GET_STORY [luid]: will return the given story if it exists (or NULL if
  34  * not)</li>
  35  * <li>SAVE_STORY [luid]: save the story (that must be sent just after the
  36  * command) with the given LUID, then return the LUID</li>
  37  * <li>IMPORT [url]: save the story found at the given URL, then return the LUID
  38  * </li>
  39  * <li>DELETE_STORY [luid]: delete the story of LUID luid</li>
  40  * <li>GET_COVER [luid]: return the cover of the story</li>
  41  * <li>GET_CUSTOM_COVER ["SOURCE"|"AUTHOR"] [source]: return the cover for this
  42  * source/author</li>
  43  * <li>SET_COVER ["SOURCE"|"AUTHOR"] [value] [luid]: set the default cover for
  44  * the given source/author to the cover of the story denoted by luid</li>
  45  * <li>CHANGE_SOURCE [luid] [new source]: change the source of the story of LUID
  46  * luid</li>
  47  * <li>EXIT: stop the server</li>
  48  * </ul>
  49  *
  50  * @author niki
  51  */
  52 public class RemoteLibraryServer extends ServerObject {
  53         /**
  54          * Create a new remote server (will not be active until
  55          * {@link RemoteLibraryServer#start()} is called).
  56          *
  57          * @param key
  58          *            the key that will restrict access to this server
  59          * @param port
  60          *            the port to listen on
  61          *
  62          * @throws IOException
  63          *             in case of I/O error
  64          */
  65         public RemoteLibraryServer(String key, int port) throws IOException {
  66                 super("Fanfix remote library", port, key);
  67                 setTraceHandler(Instance.getTraceHandler());
  68         }
  69
  70         @Override
  71         protected Object onRequest(ConnectActionServerObject action, Object data)
  72                         throws Exception {
  73                 long start = new Date().getTime();
  74
  75                 String command = "";
  76                 Object[] args = new Object[0];
  77                 if (data instanceof Object[]) {
  78                         Object[] dataArray = (Object[]) data;
  79                         if (dataArray.length > 0) {
  80                                 command = "" + dataArray[0];
  81
  82                                 args = new Object[dataArray.length - 1];
  83                                 for (int i = 1; i < dataArray.length; i++) {
  84                                         args[i - 1] = dataArray[i];
  85                                 }
  86                         }
  87                 }
  88
  89                 String trace = "[ " + command + "] ";
  90                 for (Object arg : args) {
  91                         trace += arg + " ";
  92                 }
  93                 System.out.println(trace);
  94
  95                 Object rep = doRequest(action, command, args);
  96
  97                 String rec = StringUtils.formatNumber(action.getBytesReceived()) + "b";
  98                 String sent = StringUtils.formatNumber(action.getBytesSent()) + "b";
  99                 System.out.println(String.format("[>%s]: (%s sent, %s rec) in %d ms",
 100                                 command, sent, rec, (new Date().getTime() - start)));
 101
 102                 return rep;
 103         }
 104
 105         private Object doRequest(ConnectActionServerObject action, String command,
 106                         Object[] args) throws NoSuchFieldException, NoSuchMethodException,
 107                         ClassNotFoundException, IOException {
 108                 if ("PING".equals(command)) {
 109                         return "PONG";
 110                 } else if ("GET_METADATA".equals(command)) {
 111                         if ("*".equals(args[0])) {
 112                                 Progress pg = createPgForwarder(action);
 113
 114                                 List<MetaData> metas = new ArrayList<MetaData>();
 115
 116                                 for (MetaData meta : Instance.getLibrary().getMetas(pg)) {
 117                                         MetaData light;
 118                                         if (meta.getCover() == null) {
 119                                                 light = meta;
 120                                         } else {
 121                                                 light = meta.clone();
 122                                                 light.setCover(null);
 123                                         }
 124
 125                                         metas.add(light);
 126                                 }
 127
 128                                 forcePgDoneSent(pg);
 129                                 return metas.toArray(new MetaData[] {});
 130                         }
 131
 132                         return new MetaData[] { Instance.getLibrary().getInfo(
 133                                         (String) args[0]) };
 134                 } else if ("GET_STORY".equals(command)) {
 135                         MetaData meta = Instance.getLibrary().getInfo((String) args[0]);
 136                         meta = meta.clone();
 137                         meta.setCover(null);
 138
 139                         action.send(meta);
 140                         action.rec();
 141
 142                         Story story = Instance.getLibrary()
 143                                         .getStory((String) args[0], null);
 144                         for (Object obj : breakStory(story)) {
 145                                 action.send(obj);
 146                                 action.rec();
 147                         }
 148                 } else if ("SAVE_STORY".equals(command)) {
 149                         List<Object> list = new ArrayList<Object>();
 150
 151                         action.send(null);
 152                         Object obj = action.rec();
 153                         while (obj != null) {
 154                                 list.add(obj);
 155                                 action.send(null);
 156                                 obj = action.rec();
 157                         }
 158
 159                         Story story = rebuildStory(list);
 160                         Instance.getLibrary().save(story, (String) args[0], null);
 161                         return story.getMeta().getLuid();
 162                 } else if ("IMPORT".equals(command)) {
 163                         Progress pg = createPgForwarder(action);
 164                         Story story = Instance.getLibrary().imprt(
 165                                         new URL((String) args[0]), pg);
 166                         forcePgDoneSent(pg);
 167                         return story.getMeta().getLuid();
 168                 } else if ("DELETE_STORY".equals(command)) {
 169                         Instance.getLibrary().delete((String) args[0]);
 170                 } else if ("GET_COVER".equals(command)) {
 171                         return Instance.getLibrary().getCover((String) args[0]);
 172                 } else if ("GET_CUSTOM_COVER".equals(command)) {
 173                         if ("SOURCE".equals(args[0])) {
 174                                 return Instance.getLibrary().getCustomSourceCover(
 175                                                 (String) args[1]);
 176                         } else if ("AUTHOR".equals(args[0])) {
 177                                 return Instance.getLibrary().getCustomAuthorCover(
 178                                                 (String) args[1]);
 179                         } else {
 180                                 return null;
 181                         }
 182                 } else if ("SET_COVER".equals(command)) {
 183                         if ("SOURCE".equals(args[0])) {
 184                                 Instance.getLibrary().setSourceCover((String) args[1],
 185                                                 (String) args[2]);
 186                         } else if ("AUTHOR".equals(args[0])) {
 187                                 Instance.getLibrary().setAuthorCover((String) args[1],
 188                                                 (String) args[2]);
 189                         }
 190                 } else if ("CHANGE_STA".equals(command)) {
 191                         Progress pg = createPgForwarder(action);
 192                         Instance.getLibrary().changeSTA((String) args[0], (String) args[1],
 193                                         (String) args[2], (String) args[3], pg);
 194                         forcePgDoneSent(pg);
 195                 } else if ("EXIT".equals(command)) {
 196                         stop(0, false);
 197                 }
 198
 199                 return null;
 200         }
 201
 202         @Override
 203         protected void onError(Exception e) {
 204                 if (e instanceof SSLException) {
 205                         System.out.println("[Client connection refused (bad key)]");
 206                 } else {
 207                         getTraceHandler().error(e);
 208                 }
 209         }
 210
 211         /**
 212          * Break a story in multiple {@link Object}s for easier serialisation.
 213          *
 214          * @param story
 215          *            the {@link Story} to break
 216          *
 217          * @return the list of {@link Object}s
 218          */
 219         static List<Object> breakStory(Story story) {
 220                 List<Object> list = new ArrayList<Object>();
 221
 222                 story = story.clone();
 223                 list.add(story);
 224
 225                 if (story.getMeta().isImageDocument()) {
 226                         for (Chapter chap : story) {
 227                                 list.add(chap);
 228                                 list.addAll(chap.getParagraphs());
 229                                 chap.setParagraphs(new ArrayList<Paragraph>());
 230                         }
 231                         story.setChapters(new ArrayList<Chapter>());
 232                 }
 233
 234                 return list;
 235         }
 236
 237         /**
 238          * Rebuild a story from a list of broke up {@link Story} parts.
 239          *
 240          * @param list
 241          *            the list of {@link Story} parts
 242          *
 243          * @return the reconstructed {@link Story}
 244          */
 245         static Story rebuildStory(List<Object> list) {
 246                 Story story = null;
 247                 Chapter chap = null;
 248
 249                 for (Object obj : list) {
 250                         if (obj instanceof Story) {
 251                                 story = (Story) obj;
 252                         } else if (obj instanceof Chapter) {
 253                                 chap = (Chapter) obj;
 254                                 story.getChapters().add(chap);
 255                         } else if (obj instanceof Paragraph) {
 256                                 chap.getParagraphs().add((Paragraph) obj);
 257                         }
 258                 }
 259
 260                 return story;
 261         }
 262
 263         /**
 264          * Update the {@link Progress} with the adequate {@link Object} received
 265          * from the network via {@link RemoteLibraryServer}.
 266          *
 267          * @param pg
 268          *            the {@link Progress} to update
 269          * @param rep
 270          *            the object received from the network
 271          *
 272          * @return TRUE if it was a progress event, FALSE if not
 273          */
 274         static boolean updateProgress(Progress pg, Object rep) {
 275                 if (rep instanceof Integer[]) {
 276                         Integer[] a = (Integer[]) rep;
 277                         if (a.length == 3) {
 278                                 int min = a[0];
 279                                 int max = a[1];
 280                                 int progress = a[2];
 281
 282                                 if (min >= 0 && min <= max) {
 283                                         pg.setMinMax(min, max);
 284                                         pg.setProgress(progress);
 285
 286                                         return true;
 287                                 }
 288                         }
 289                 }
 290
 291                 return false;
 292         }
 293
 294         /**
 295          * Create a {@link Progress} that will forward its progress over the
 296          * network.
 297          *
 298          * @param action
 299          *            the {@link ConnectActionServerObject} to use to forward it
 300          *
 301          * @return the {@link Progress}
 302          */
 303         private Progress createPgForwarder(final ConnectActionServerObject action) {
 304                 final Boolean[] isDoneForwarded = new Boolean[] { false };
 305                 final Progress pg = new Progress() {
 306                         @Override
 307                         public boolean isDone() {
 308                                 return isDoneForwarded[0];
 309                         }
 310                 };
 311
 312                 final Integer[] p = new Integer[] { -1, -1, -1 };
 313                 final Long[] lastTime = new Long[] { new Date().getTime() };
 314                 pg.addProgressListener(new ProgressListener() {
 315                         @Override
 316                         public void progress(Progress progress, String name) {
 317                                 int min = pg.getMin();
 318                                 int max = pg.getMax();
 319                                 int relativeProgress = min
 320                                                 + (int) Math.round(pg.getRelativeProgress()
 321                                                                 * (max - min));
 322
 323                                 // Do not re-send the same value twice over the wire,
 324                                 // unless more than 2 seconds have elapsed (to maintain the
 325                                 // connection)
 326                                 if ((p[0] != min || p[1] != max || p[2] != relativeProgress)
 327                                                 || (new Date().getTime() - lastTime[0] > 2000)) {
 328                                         p[0] = min;
 329                                         p[1] = max;
 330                                         p[2] = relativeProgress;
 331
 332                                         try {
 333                                                 action.send(new Integer[] { min, max, relativeProgress });
 334                                                 action.rec();
 335                                         } catch (Exception e) {
 336                                                 getTraceHandler().error(e);
 337                                         }
 338
 339                                         lastTime[0] = new Date().getTime();
 340                                 }
 341
 342                                 isDoneForwarded[0] = (pg.getProgress() >= pg.getMax());
 343                         }
 344                 });
 345
 346                 return pg;
 347         }
 348
 349         // with 30 seconds timeout
 350         private void forcePgDoneSent(Progress pg) {
 351                 long start = new Date().getTime();
 352                 pg.done();
 353                 while (!pg.isDone() && new Date().getTime() - start < 30000) {
 354                         try {
 355                                 Thread.sleep(100);
 356                         } catch (InterruptedException e) {
 357                                 getTraceHandler().error(e);
 358                         }
 359                 }
 360         }
 361 }