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.HashMap;
   8 import java.util.List;
   9 import java.util.Map;
  10
  11 import javax.net.ssl.SSLException;
  12
  13 import be.nikiroo.fanfix.Instance;
  14 import be.nikiroo.fanfix.bundles.Config;
  15 import be.nikiroo.fanfix.data.Chapter;
  16 import be.nikiroo.fanfix.data.MetaData;
  17 import be.nikiroo.fanfix.data.Paragraph;
  18 import be.nikiroo.fanfix.data.Story;
  19 import be.nikiroo.utils.Progress;
  20 import be.nikiroo.utils.Progress.ProgressListener;
  21 import be.nikiroo.utils.StringUtils;
  22 import be.nikiroo.utils.Version;
  23 import be.nikiroo.utils.serial.server.ConnectActionServerObject;
  24 import be.nikiroo.utils.serial.server.ServerObject;
  25
  26 /**
  27  * Create a new remote server that will listen for orders on the given port.
  28  * <p>
  29  * The available commands are given as arrays of objects (first item is the
  30  * command, the rest are the arguments).
  31  * <p>
  32  * All the commands are always prefixed by the subkey (which can be EMPTY if
  33  * none).
  34  * <p>
  35  * <ul>
  36  * <li>PING: will return the mode if the key is accepted (mode can be: "r/o" or
  37  * "r/w")</li>
  38  * <li>GET_METADATA *: will return the metadata of all the stories in the
  39  * library (array)</li> *
  40  * <li>GET_METADATA [luid]: will return the metadata of the story of LUID luid</li>
  41  * <li>GET_STORY [luid]: will return the given story if it exists (or NULL if
  42  * not)</li>
  43  * <li>SAVE_STORY [luid]: save the story (that must be sent just after the
  44  * command) with the given LUID, then return the LUID</li>
  45  * <li>IMPORT [url]: save the story found at the given URL, then return the LUID
  46  * </li>
  47  * <li>DELETE_STORY [luid]: delete the story of LUID luid</li>
  48  * <li>GET_COVER [luid]: return the cover of the story</li>
  49  * <li>GET_CUSTOM_COVER ["SOURCE"|"AUTHOR"] [source]: return the cover for this
  50  * source/author</li>
  51  * <li>SET_COVER ["SOURCE"|"AUTHOR"] [value] [luid]: set the default cover for
  52  * the given source/author to the cover of the story denoted by luid</li>
  53  * <li>CHANGE_SOURCE [luid] [new source]: change the source of the story of LUID
  54  * luid</li>
  55  * <li>EXIT: stop the server</li>
  56  * </ul>
  57  *
  58  * @author niki
  59  */
  60 public class RemoteLibraryServer extends ServerObject {
  61         private Map<Long, String> commands = new HashMap<Long, String>();
  62         private Map<Long, Long> times = new HashMap<Long, Long>();
  63         private Map<Long, Boolean> wls = new HashMap<Long, Boolean>();
  64         private Map<Long, Boolean> rws = new HashMap<Long, Boolean>();
  65
  66         /**
  67          * Create a new remote server (will not be active until
  68          * {@link RemoteLibraryServer#start()} is called).
  69          * <p>
  70          * Note: the key we use here is the encryption key (it must not contain a
  71          * subkey).
  72          *
  73          * @param key
  74          *            the key that will restrict access to this server
  75          * @param port
  76          *            the port to listen on
  77          *
  78          * @throws IOException
  79          *             in case of I/O error
  80          */
  81         public RemoteLibraryServer(String key, int port) throws IOException {
  82                 super("Fanfix remote library", port, key);
  83                 setTraceHandler(Instance.getTraceHandler());
  84         }
  85
  86         @Override
  87         protected Object onRequest(ConnectActionServerObject action,
  88                         Version clientVersion, Object data, long id) throws Exception {
  89                 long start = new Date().getTime();
  90
  91                 // defaults are positive (as previous versions without the feature)
  92                 boolean rw = true;
  93                 boolean wl = true;
  94
  95                 String subkey = "";
  96                 String command = "";
  97                 Object[] args = new Object[0];
  98                 if (data instanceof Object[]) {
  99                         Object[] dataArray = (Object[]) data;
 100                         if (dataArray.length > 0) {
 101                                 subkey = "" + dataArray[0];
 102                         }
 103                         if (dataArray.length > 1) {
 104                                 command = "" + dataArray[1];
 105
 106                                 args = new Object[dataArray.length - 2];
 107                                 for (int i = 2; i < dataArray.length; i++) {
 108                                         args[i - 2] = dataArray[i];
 109                                 }
 110                         }
 111                 }
 112
 113                 List<String> whitelist = Instance.getConfig().getList(
 114                                 Config.SERVER_WHITELIST);
 115                 if (whitelist == null) {
 116                         whitelist = new ArrayList<String>();
 117                 }
 118
 119                 if (whitelist.isEmpty()) {
 120                         wl = false;
 121                 }
 122
 123                 rw = Instance.getConfig().getBoolean(Config.SERVER_RW, rw);
 124                 if (!subkey.isEmpty()) {
 125                         List<String> allowed = Instance.getConfig().getList(
 126                                         Config.SERVER_ALLOWED_SUBKEYS);
 127                         if (allowed.contains(subkey)) {
 128                                 if ((subkey + "|").contains("|rw|")) {
 129                                         rw = true;
 130                                 }
 131                                 if ((subkey + "|").contains("|wl|")) {
 132                                         wl = false; // |wl| = bypass whitelist
 133                                         whitelist = new ArrayList<String>();
 134                                 }
 135                         }
 136                 }
 137
 138                 String mode = display(wl, rw);
 139
 140                 String trace = mode + "[ " + command + "] ";
 141                 for (Object arg : args) {
 142                         trace += arg + " ";
 143                 }
 144                 long now = System.currentTimeMillis();
 145                 System.out.println(StringUtils.fromTime(now) + ": " + trace);
 146
 147                 Object rep = null;
 148                 try {
 149                         rep = doRequest(action, command, args, rw, whitelist);
 150                 } catch (IOException e) {
 151                         rep = new RemoteLibraryException(e, true);
 152                 }
 153
 154                 commands.put(id, command);
 155                 wls.put(id, wl);
 156                 rws.put(id, rw);
 157                 times.put(id, (new Date().getTime() - start));
 158
 159                 return rep;
 160         }
 161
 162         private String display(boolean whitelist, boolean rw) {
 163                 String mode = "";
 164                 if (!rw) {
 165                         mode += "RO: ";
 166                 }
 167                 if (whitelist) {
 168                         mode += "WL: ";
 169                 }
 170
 171                 return mode;
 172         }
 173
 174         @Override
 175         protected void onRequestDone(long id, long bytesReceived, long bytesSent) {
 176                 boolean whitelist = wls.get(id);
 177                 boolean rw = rws.get(id);
 178                 wls.remove(id);
 179                 rws.remove(id);
 180
 181                 String rec = StringUtils.formatNumber(bytesReceived) + "b";
 182                 String sent = StringUtils.formatNumber(bytesSent) + "b";
 183                 long now = System.currentTimeMillis();
 184                 System.out.println(StringUtils.fromTime(now)
 185                                 + ": "
 186                                 + String.format("%s[>%s]: (%s sent, %s rec) in %d ms",
 187                                                 display(whitelist, rw), commands.get(id), sent, rec,
 188                                                 times.get(id)));
 189
 190                 commands.remove(id);
 191                 times.remove(id);
 192         }
 193
 194         private Object doRequest(ConnectActionServerObject action, String command,
 195                         Object[] args, boolean rw, List<String> whitelist)
 196                         throws NoSuchFieldException, NoSuchMethodException,
 197                         ClassNotFoundException, IOException {
 198                 if ("PING".equals(command)) {
 199                         return rw ? "r/w" : "r/o";
 200                 } else if ("GET_METADATA".equals(command)) {
 201                         List<MetaData> metas = new ArrayList<MetaData>();
 202
 203                         if ("*".equals(args[0])) {
 204                                 Progress pg = createPgForwarder(action);
 205
 206                                 for (MetaData meta : Instance.getLibrary().getMetas(pg)) {
 207                                         MetaData light;
 208                                         if (meta.getCover() == null) {
 209                                                 light = meta;
 210                                         } else {
 211                                                 light = meta.clone();
 212                                                 light.setCover(null);
 213                                         }
 214
 215                                         metas.add(light);
 216                                 }
 217
 218                                 forcePgDoneSent(pg);
 219                         } else {
 220                                 MetaData meta = Instance.getLibrary().getInfo((String) args[0]);
 221                                 MetaData light;
 222                                 if (meta.getCover() == null) {
 223                                         light = meta;
 224                                 } else {
 225                                         light = meta.clone();
 226                                         light.setCover(null);
 227                                 }
 228
 229                                 metas.add(light);
 230                         }
 231
 232                         if (!whitelist.isEmpty()) {
 233                                 for (int i = 0; i < metas.size(); i++) {
 234                                         if (!whitelist.contains(metas.get(i).getSource())) {
 235                                                 metas.remove(i);
 236                                                 i--;
 237                                         }
 238                                 }
 239                         }
 240
 241                         return metas.toArray(new MetaData[0]);
 242                 } else if ("GET_STORY".equals(command)) {
 243                         MetaData meta = Instance.getLibrary().getInfo((String) args[0]);
 244                         if (meta == null) {
 245                                 return null;
 246                         }
 247
 248                         if (!whitelist.isEmpty()) {
 249                                 if (!whitelist.contains(meta.getSource())) {
 250                                         return null;
 251                                 }
 252                         }
 253
 254                         meta = meta.clone();
 255                         meta.setCover(null);
 256
 257                         action.send(meta);
 258                         action.rec();
 259
 260                         Story story = Instance.getLibrary()
 261                                         .getStory((String) args[0], null);
 262                         for (Object obj : breakStory(story)) {
 263                                 action.send(obj);
 264                                 action.rec();
 265                         }
 266                 } else if ("SAVE_STORY".equals(command)) {
 267                         if (!rw) {
 268                                 throw new RemoteLibraryException("Read-Only remote library: "
 269                                                 + args[0], false);
 270                         }
 271
 272                         List<Object> list = new ArrayList<Object>();
 273
 274                         action.send(null);
 275                         Object obj = action.rec();
 276                         while (obj != null) {
 277                                 list.add(obj);
 278                                 action.send(null);
 279                                 obj = action.rec();
 280                         }
 281
 282                         Story story = rebuildStory(list);
 283                         Instance.getLibrary().save(story, (String) args[0], null);
 284                         return story.getMeta().getLuid();
 285                 } else if ("IMPORT".equals(command)) {
 286                         if (!rw) {
 287                                 throw new RemoteLibraryException("Read-Only remote library: "
 288                                                 + args[0], false);
 289                         }
 290
 291                         Progress pg = createPgForwarder(action);
 292                         MetaData meta = Instance.getLibrary().imprt(
 293                                         new URL((String) args[0]), pg);
 294                         forcePgDoneSent(pg);
 295                         return meta.getLuid();
 296                 } else if ("DELETE_STORY".equals(command)) {
 297                         if (!rw) {
 298                                 throw new RemoteLibraryException("Read-Only remote library: "
 299                                                 + args[0], false);
 300                         }
 301
 302                         Instance.getLibrary().delete((String) args[0]);
 303                 } else if ("GET_COVER".equals(command)) {
 304                         return Instance.getLibrary().getCover((String) args[0]);
 305                 } else if ("GET_CUSTOM_COVER".equals(command)) {
 306                         if ("SOURCE".equals(args[0])) {
 307                                 return Instance.getLibrary().getCustomSourceCover(
 308                                                 (String) args[1]);
 309                         } else if ("AUTHOR".equals(args[0])) {
 310                                 return Instance.getLibrary().getCustomAuthorCover(
 311                                                 (String) args[1]);
 312                         } else {
 313                                 return null;
 314                         }
 315                 } else if ("SET_COVER".equals(command)) {
 316                         if (!rw) {
 317                                 throw new RemoteLibraryException("Read-Only remote library: "
 318                                                 + args[0] + ", " + args[1], false);
 319                         }
 320
 321                         if ("SOURCE".equals(args[0])) {
 322                                 Instance.getLibrary().setSourceCover((String) args[1],
 323                                                 (String) args[2]);
 324                         } else if ("AUTHOR".equals(args[0])) {
 325                                 Instance.getLibrary().setAuthorCover((String) args[1],
 326                                                 (String) args[2]);
 327                         }
 328                 } else if ("CHANGE_STA".equals(command)) {
 329                         if (!rw) {
 330                                 throw new RemoteLibraryException("Read-Only remote library: "
 331                                                 + args[0] + ", " + args[1], false);
 332                         }
 333
 334                         Progress pg = createPgForwarder(action);
 335                         Instance.getLibrary().changeSTA((String) args[0], (String) args[1],
 336                                         (String) args[2], (String) args[3], pg);
 337                         forcePgDoneSent(pg);
 338                 } else if ("EXIT".equals(command)) {
 339                         if (!rw) {
 340                                 throw new RemoteLibraryException(
 341                                                 "Read-Only remote library: EXIT", false);
 342                         }
 343
 344                         stop(0, false);
 345                 }
 346
 347                 return null;
 348         }
 349
 350         @Override
 351         protected void onError(Exception e) {
 352                 if (e instanceof SSLException) {
 353                         long now = System.currentTimeMillis();
 354                         System.out.println(StringUtils.fromTime(now) + ": "
 355                                         + "[Client connection refused (bad key)]");
 356                 } else {
 357                         getTraceHandler().error(e);
 358                 }
 359         }
 360
 361         /**
 362          * Break a story in multiple {@link Object}s for easier serialisation.
 363          *
 364          * @param story
 365          *            the {@link Story} to break
 366          *
 367          * @return the list of {@link Object}s
 368          */
 369         static List<Object> breakStory(Story story) {
 370                 List<Object> list = new ArrayList<Object>();
 371
 372                 story = story.clone();
 373                 list.add(story);
 374
 375                 if (story.getMeta().isImageDocument()) {
 376                         for (Chapter chap : story) {
 377                                 list.add(chap);
 378                                 list.addAll(chap.getParagraphs());
 379                                 chap.setParagraphs(new ArrayList<Paragraph>());
 380                         }
 381                         story.setChapters(new ArrayList<Chapter>());
 382                 }
 383
 384                 return list;
 385         }
 386
 387         /**
 388          * Rebuild a story from a list of broke up {@link Story} parts.
 389          *
 390          * @param list
 391          *            the list of {@link Story} parts
 392          *
 393          * @return the reconstructed {@link Story}
 394          */
 395         static Story rebuildStory(List<Object> list) {
 396                 Story story = null;
 397                 Chapter chap = null;
 398
 399                 for (Object obj : list) {
 400                         if (obj instanceof Story) {
 401                                 story = (Story) obj;
 402                         } else if (obj instanceof Chapter) {
 403                                 chap = (Chapter) obj;
 404                                 story.getChapters().add(chap);
 405                         } else if (obj instanceof Paragraph) {
 406                                 chap.getParagraphs().add((Paragraph) obj);
 407                         }
 408                 }
 409
 410                 return story;
 411         }
 412
 413         /**
 414          * Update the {@link Progress} with the adequate {@link Object} received
 415          * from the network via {@link RemoteLibraryServer}.
 416          *
 417          * @param pg
 418          *            the {@link Progress} to update
 419          * @param rep
 420          *            the object received from the network
 421          *
 422          * @return TRUE if it was a progress event, FALSE if not
 423          */
 424         static boolean updateProgress(Progress pg, Object rep) {
 425                 if (rep instanceof Integer[]) {
 426                         Integer[] a = (Integer[]) rep;
 427                         if (a.length == 3) {
 428                                 int min = a[0];
 429                                 int max = a[1];
 430                                 int progress = a[2];
 431
 432                                 if (min >= 0 && min <= max) {
 433                                         pg.setMinMax(min, max);
 434                                         pg.setProgress(progress);
 435
 436                                         return true;
 437                                 }
 438                         }
 439                 }
 440
 441                 return false;
 442         }
 443
 444         /**
 445          * Create a {@link Progress} that will forward its progress over the
 446          * network.
 447          *
 448          * @param action
 449          *            the {@link ConnectActionServerObject} to use to forward it
 450          *
 451          * @return the {@link Progress}
 452          */
 453         private Progress createPgForwarder(final ConnectActionServerObject action) {
 454                 final Boolean[] isDoneForwarded = new Boolean[] { false };
 455                 final Progress pg = new Progress() {
 456                         @Override
 457                         public boolean isDone() {
 458                                 return isDoneForwarded[0];
 459                         }
 460                 };
 461
 462                 final Integer[] p = new Integer[] { -1, -1, -1 };
 463                 final Long[] lastTime = new Long[] { new Date().getTime() };
 464                 pg.addProgressListener(new ProgressListener() {
 465                         @Override
 466                         public void progress(Progress progress, String name) {
 467                                 int min = pg.getMin();
 468                                 int max = pg.getMax();
 469                                 int relativeProgress = min
 470                                                 + (int) Math.round(pg.getRelativeProgress()
 471                                                                 * (max - min));
 472
 473                                 // Do not re-send the same value twice over the wire,
 474                                 // unless more than 2 seconds have elapsed (to maintain the
 475                                 // connection)
 476                                 if ((p[0] != min || p[1] != max || p[2] != relativeProgress)
 477                                                 || (new Date().getTime() - lastTime[0] > 2000)) {
 478                                         p[0] = min;
 479                                         p[1] = max;
 480                                         p[2] = relativeProgress;
 481
 482                                         try {
 483                                                 action.send(new Integer[] { min, max, relativeProgress });
 484                                                 action.rec();
 485                                         } catch (Exception e) {
 486                                                 getTraceHandler().error(e);
 487                                         }
 488
 489                                         lastTime[0] = new Date().getTime();
 490                                 }
 491
 492                                 isDoneForwarded[0] = (pg.getProgress() >= pg.getMax());
 493                         }
 494                 });
 495
 496                 return pg;
 497         }
 498
 499         // with 30 seconds timeout
 500         private void forcePgDoneSent(Progress pg) {
 501                 long start = new Date().getTime();
 502                 pg.done();
 503                 while (!pg.isDone() && new Date().getTime() - start < 30000) {
 504                         try {
 505                                 Thread.sleep(100);
 506                         } catch (InterruptedException e) {
 507                                 getTraceHandler().error(e);
 508                         }
 509                 }
 510         }
 511 }