| 1 | package be.nikiroo.fanfix.library; |
| 2 | |
| 3 | import java.io.IOException; |
| 4 | import java.net.URL; |
| 5 | import java.nio.file.AccessDeniedException; |
| 6 | import java.util.ArrayList; |
| 7 | import java.util.Date; |
| 8 | import java.util.HashMap; |
| 9 | import java.util.List; |
| 10 | import java.util.Map; |
| 11 | |
| 12 | import javax.net.ssl.SSLException; |
| 13 | |
| 14 | import be.nikiroo.fanfix.Instance; |
| 15 | import be.nikiroo.fanfix.bundles.Config; |
| 16 | import be.nikiroo.fanfix.data.Chapter; |
| 17 | import be.nikiroo.fanfix.data.MetaData; |
| 18 | import be.nikiroo.fanfix.data.Paragraph; |
| 19 | import be.nikiroo.fanfix.data.Story; |
| 20 | import be.nikiroo.utils.Progress; |
| 21 | import be.nikiroo.utils.Progress.ProgressListener; |
| 22 | import be.nikiroo.utils.StringUtils; |
| 23 | import be.nikiroo.utils.Version; |
| 24 | import be.nikiroo.utils.serial.server.ConnectActionServerObject; |
| 25 | import be.nikiroo.utils.serial.server.ServerObject; |
| 26 | |
| 27 | /** |
| 28 | * Create a new remote server that will listen for orders on the given port. |
| 29 | * <p> |
| 30 | * The available commands are given as arrays of objects (first item is the |
| 31 | * command, the rest are the arguments). |
| 32 | * <p> |
| 33 | * All the commands are always prefixed by the subkey (which can be EMPTY if |
| 34 | * none). |
| 35 | * <p> |
| 36 | * <ul> |
| 37 | * <li>PING: will return the mode if the key is accepted (mode can be: "r/o" or |
| 38 | * "r/w")</li> |
| 39 | * <li>GET_METADATA *: will return the metadata of all the stories in the |
| 40 | * library (array)</li> * |
| 41 | * <li>GET_METADATA [luid]: will return the metadata of the story of LUID luid</li> |
| 42 | * <li>GET_STORY [luid]: will return the given story if it exists (or NULL if |
| 43 | * not)</li> |
| 44 | * <li>SAVE_STORY [luid]: save the story (that must be sent just after the |
| 45 | * command) with the given LUID, then return the LUID</li> |
| 46 | * <li>IMPORT [url]: save the story found at the given URL, then return the LUID |
| 47 | * </li> |
| 48 | * <li>DELETE_STORY [luid]: delete the story of LUID luid</li> |
| 49 | * <li>GET_COVER [luid]: return the cover of the story</li> |
| 50 | * <li>GET_CUSTOM_COVER ["SOURCE"|"AUTHOR"] [source]: return the cover for this |
| 51 | * source/author</li> |
| 52 | * <li>SET_COVER ["SOURCE"|"AUTHOR"] [value] [luid]: set the default cover for |
| 53 | * the given source/author to the cover of the story denoted by luid</li> |
| 54 | * <li>CHANGE_SOURCE [luid] [new source]: change the source of the story of LUID |
| 55 | * luid</li> |
| 56 | * <li>EXIT: stop the server</li> |
| 57 | * </ul> |
| 58 | * |
| 59 | * @author niki |
| 60 | */ |
| 61 | public class RemoteLibraryServer extends ServerObject { |
| 62 | private Map<Long, String> commands = new HashMap<Long, String>(); |
| 63 | private Map<Long, Long> times = new HashMap<Long, Long>(); |
| 64 | private Map<Long, Boolean> wls = new HashMap<Long, Boolean>(); |
| 65 | private Map<Long, Boolean> rws = new HashMap<Long, Boolean>(); |
| 66 | |
| 67 | /** |
| 68 | * Create a new remote server (will not be active until |
| 69 | * {@link RemoteLibraryServer#start()} is called). |
| 70 | * <p> |
| 71 | * Note: the key we use here is the encryption key (it must not contain a |
| 72 | * subkey). |
| 73 | * |
| 74 | * @param key |
| 75 | * the key that will restrict access to this server |
| 76 | * @param port |
| 77 | * the port to listen on |
| 78 | * |
| 79 | * @throws IOException |
| 80 | * in case of I/O error |
| 81 | */ |
| 82 | public RemoteLibraryServer(String key, int port) throws IOException { |
| 83 | super("Fanfix remote library", port, key); |
| 84 | setTraceHandler(Instance.getTraceHandler()); |
| 85 | } |
| 86 | |
| 87 | @Override |
| 88 | protected Object onRequest(ConnectActionServerObject action, |
| 89 | Version clientVersion, Object data, long id) throws Exception { |
| 90 | long start = new Date().getTime(); |
| 91 | |
| 92 | // defaults are positive (as previous versions without the feature) |
| 93 | boolean rw = true; |
| 94 | boolean wl = true; |
| 95 | |
| 96 | String subkey = ""; |
| 97 | String command = ""; |
| 98 | Object[] args = new Object[0]; |
| 99 | if (data instanceof Object[]) { |
| 100 | Object[] dataArray = (Object[]) data; |
| 101 | if (dataArray.length > 0) { |
| 102 | subkey = "" + dataArray[0]; |
| 103 | } |
| 104 | if (dataArray.length > 1) { |
| 105 | command = "" + dataArray[1]; |
| 106 | |
| 107 | args = new Object[dataArray.length - 2]; |
| 108 | for (int i = 2; i < dataArray.length; i++) { |
| 109 | args[i - 2] = dataArray[i]; |
| 110 | } |
| 111 | } |
| 112 | } |
| 113 | |
| 114 | List<String> whitelist = Instance.getConfig().getList( |
| 115 | Config.SERVER_WHITELIST); |
| 116 | if (whitelist == null) { |
| 117 | whitelist = new ArrayList<String>(); |
| 118 | } |
| 119 | |
| 120 | if (whitelist.isEmpty()) { |
| 121 | wl = false; |
| 122 | } |
| 123 | |
| 124 | rw = Instance.getConfig().getBoolean(Config.SERVER_RW, rw); |
| 125 | if (!subkey.isEmpty()) { |
| 126 | List<String> allowed = Instance.getConfig().getList( |
| 127 | Config.SERVER_ALLOWED_SUBKEYS); |
| 128 | if (allowed.contains(subkey)) { |
| 129 | if ((subkey + "|").contains("|rw|")) { |
| 130 | rw = true; |
| 131 | } |
| 132 | if ((subkey + "|").contains("|wl|")) { |
| 133 | wl = false; // |wl| = bypass whitelist |
| 134 | whitelist = new ArrayList<String>(); |
| 135 | } |
| 136 | } |
| 137 | } |
| 138 | |
| 139 | String mode = display(wl, rw); |
| 140 | |
| 141 | String trace = mode + "[ " + command + "] "; |
| 142 | for (Object arg : args) { |
| 143 | trace += arg + " "; |
| 144 | } |
| 145 | System.out.println(trace); |
| 146 | |
| 147 | Object rep = doRequest(action, command, args, rw, whitelist); |
| 148 | |
| 149 | commands.put(id, command); |
| 150 | wls.put(id, wl); |
| 151 | rws.put(id, rw); |
| 152 | times.put(id, (new Date().getTime() - start)); |
| 153 | |
| 154 | return rep; |
| 155 | } |
| 156 | |
| 157 | private String display(boolean whitelist, boolean rw) { |
| 158 | String mode = ""; |
| 159 | if (!rw) { |
| 160 | mode += "RO: "; |
| 161 | } |
| 162 | if (whitelist) { |
| 163 | mode += "WL: "; |
| 164 | } |
| 165 | |
| 166 | return mode; |
| 167 | } |
| 168 | |
| 169 | @Override |
| 170 | protected void onRequestDone(long id, long bytesReceived, long bytesSent) { |
| 171 | boolean whitelist = wls.get(id); |
| 172 | boolean rw = rws.get(id); |
| 173 | wls.remove(id); |
| 174 | rws.remove(id); |
| 175 | |
| 176 | String rec = StringUtils.formatNumber(bytesReceived) + "b"; |
| 177 | String sent = StringUtils.formatNumber(bytesSent) + "b"; |
| 178 | System.out.println(String.format("%s[>%s]: (%s sent, %s rec) in %d ms", |
| 179 | display(whitelist, rw), commands.get(id), sent, rec, |
| 180 | times.get(id))); |
| 181 | |
| 182 | commands.remove(id); |
| 183 | times.remove(id); |
| 184 | } |
| 185 | |
| 186 | private Object doRequest(ConnectActionServerObject action, String command, |
| 187 | Object[] args, boolean rw, List<String> whitelist) |
| 188 | throws NoSuchFieldException, NoSuchMethodException, |
| 189 | ClassNotFoundException, IOException { |
| 190 | if ("PING".equals(command)) { |
| 191 | return rw ? "r/w" : "r/o"; |
| 192 | } else if ("GET_METADATA".equals(command)) { |
| 193 | List<MetaData> metas = new ArrayList<MetaData>(); |
| 194 | |
| 195 | if ("*".equals(args[0])) { |
| 196 | Progress pg = createPgForwarder(action); |
| 197 | |
| 198 | for (MetaData meta : Instance.getLibrary().getMetas(pg)) { |
| 199 | MetaData light; |
| 200 | if (meta.getCover() == null) { |
| 201 | light = meta; |
| 202 | } else { |
| 203 | light = meta.clone(); |
| 204 | light.setCover(null); |
| 205 | } |
| 206 | |
| 207 | metas.add(light); |
| 208 | } |
| 209 | |
| 210 | forcePgDoneSent(pg); |
| 211 | } else { |
| 212 | MetaData meta = Instance.getLibrary().getInfo((String) args[0]); |
| 213 | MetaData light; |
| 214 | if (meta.getCover() == null) { |
| 215 | light = meta; |
| 216 | } else { |
| 217 | light = meta.clone(); |
| 218 | light.setCover(null); |
| 219 | } |
| 220 | |
| 221 | metas.add(light); |
| 222 | } |
| 223 | |
| 224 | if (!whitelist.isEmpty()) { |
| 225 | for (int i = 0; i < metas.size(); i++) { |
| 226 | if (!whitelist.contains(metas.get(i).getSource())) { |
| 227 | metas.remove(i); |
| 228 | i--; |
| 229 | } |
| 230 | } |
| 231 | } |
| 232 | |
| 233 | return metas.toArray(new MetaData[0]); |
| 234 | } else if ("GET_STORY".equals(command)) { |
| 235 | MetaData meta = Instance.getLibrary().getInfo((String) args[0]); |
| 236 | if (meta == null) { |
| 237 | return null; |
| 238 | } |
| 239 | |
| 240 | if (!whitelist.isEmpty()) { |
| 241 | if (!whitelist.contains(meta.getSource())) { |
| 242 | return null; |
| 243 | } |
| 244 | } |
| 245 | |
| 246 | meta = meta.clone(); |
| 247 | meta.setCover(null); |
| 248 | |
| 249 | action.send(meta); |
| 250 | action.rec(); |
| 251 | |
| 252 | Story story = Instance.getLibrary() |
| 253 | .getStory((String) args[0], null); |
| 254 | for (Object obj : breakStory(story)) { |
| 255 | action.send(obj); |
| 256 | action.rec(); |
| 257 | } |
| 258 | } else if ("SAVE_STORY".equals(command)) { |
| 259 | if (!rw) { |
| 260 | throw new AccessDeniedException("" + args[0], null, |
| 261 | "Read-Only remote library"); |
| 262 | } |
| 263 | |
| 264 | List<Object> list = new ArrayList<Object>(); |
| 265 | |
| 266 | action.send(null); |
| 267 | Object obj = action.rec(); |
| 268 | while (obj != null) { |
| 269 | list.add(obj); |
| 270 | action.send(null); |
| 271 | obj = action.rec(); |
| 272 | } |
| 273 | |
| 274 | Story story = rebuildStory(list); |
| 275 | Instance.getLibrary().save(story, (String) args[0], null); |
| 276 | return story.getMeta().getLuid(); |
| 277 | } else if ("IMPORT".equals(command)) { |
| 278 | if (!rw) { |
| 279 | throw new AccessDeniedException("" + args[0], null, |
| 280 | "Read-Only remote library"); |
| 281 | } |
| 282 | |
| 283 | Progress pg = createPgForwarder(action); |
| 284 | Story story = Instance.getLibrary().imprt( |
| 285 | new URL((String) args[0]), pg); |
| 286 | forcePgDoneSent(pg); |
| 287 | return story.getMeta().getLuid(); |
| 288 | } else if ("DELETE_STORY".equals(command)) { |
| 289 | if (!rw) { |
| 290 | throw new AccessDeniedException("" + args[0], null, |
| 291 | "Read-Only remote library"); |
| 292 | } |
| 293 | |
| 294 | Instance.getLibrary().delete((String) args[0]); |
| 295 | } else if ("GET_COVER".equals(command)) { |
| 296 | return Instance.getLibrary().getCover((String) args[0]); |
| 297 | } else if ("GET_CUSTOM_COVER".equals(command)) { |
| 298 | if ("SOURCE".equals(args[0])) { |
| 299 | return Instance.getLibrary().getCustomSourceCover( |
| 300 | (String) args[1]); |
| 301 | } else if ("AUTHOR".equals(args[0])) { |
| 302 | return Instance.getLibrary().getCustomAuthorCover( |
| 303 | (String) args[1]); |
| 304 | } else { |
| 305 | return null; |
| 306 | } |
| 307 | } else if ("SET_COVER".equals(command)) { |
| 308 | if (!rw) { |
| 309 | throw new AccessDeniedException("" + args[0], "" + args[1], |
| 310 | "Read-Only remote library"); |
| 311 | } |
| 312 | |
| 313 | if ("SOURCE".equals(args[0])) { |
| 314 | Instance.getLibrary().setSourceCover((String) args[1], |
| 315 | (String) args[2]); |
| 316 | } else if ("AUTHOR".equals(args[0])) { |
| 317 | Instance.getLibrary().setAuthorCover((String) args[1], |
| 318 | (String) args[2]); |
| 319 | } |
| 320 | } else if ("CHANGE_STA".equals(command)) { |
| 321 | if (!rw) { |
| 322 | throw new AccessDeniedException("" + args[0], "" + args[1], |
| 323 | "Read-Only remote library"); |
| 324 | } |
| 325 | |
| 326 | Progress pg = createPgForwarder(action); |
| 327 | Instance.getLibrary().changeSTA((String) args[0], (String) args[1], |
| 328 | (String) args[2], (String) args[3], pg); |
| 329 | forcePgDoneSent(pg); |
| 330 | } else if ("EXIT".equals(command)) { |
| 331 | if (!rw) { |
| 332 | throw new AccessDeniedException("EXIT", "", |
| 333 | "Read-Only remote library, cannot close it"); |
| 334 | } |
| 335 | |
| 336 | stop(0, false); |
| 337 | } |
| 338 | |
| 339 | return null; |
| 340 | } |
| 341 | |
| 342 | @Override |
| 343 | protected void onError(Exception e) { |
| 344 | if (e instanceof SSLException) { |
| 345 | System.out.println("[Client connection refused (bad key)]"); |
| 346 | } else { |
| 347 | getTraceHandler().error(e); |
| 348 | } |
| 349 | } |
| 350 | |
| 351 | /** |
| 352 | * Break a story in multiple {@link Object}s for easier serialisation. |
| 353 | * |
| 354 | * @param story |
| 355 | * the {@link Story} to break |
| 356 | * |
| 357 | * @return the list of {@link Object}s |
| 358 | */ |
| 359 | static List<Object> breakStory(Story story) { |
| 360 | List<Object> list = new ArrayList<Object>(); |
| 361 | |
| 362 | story = story.clone(); |
| 363 | list.add(story); |
| 364 | |
| 365 | if (story.getMeta().isImageDocument()) { |
| 366 | for (Chapter chap : story) { |
| 367 | list.add(chap); |
| 368 | list.addAll(chap.getParagraphs()); |
| 369 | chap.setParagraphs(new ArrayList<Paragraph>()); |
| 370 | } |
| 371 | story.setChapters(new ArrayList<Chapter>()); |
| 372 | } |
| 373 | |
| 374 | return list; |
| 375 | } |
| 376 | |
| 377 | /** |
| 378 | * Rebuild a story from a list of broke up {@link Story} parts. |
| 379 | * |
| 380 | * @param list |
| 381 | * the list of {@link Story} parts |
| 382 | * |
| 383 | * @return the reconstructed {@link Story} |
| 384 | */ |
| 385 | static Story rebuildStory(List<Object> list) { |
| 386 | Story story = null; |
| 387 | Chapter chap = null; |
| 388 | |
| 389 | for (Object obj : list) { |
| 390 | if (obj instanceof Story) { |
| 391 | story = (Story) obj; |
| 392 | } else if (obj instanceof Chapter) { |
| 393 | chap = (Chapter) obj; |
| 394 | story.getChapters().add(chap); |
| 395 | } else if (obj instanceof Paragraph) { |
| 396 | chap.getParagraphs().add((Paragraph) obj); |
| 397 | } |
| 398 | } |
| 399 | |
| 400 | return story; |
| 401 | } |
| 402 | |
| 403 | /** |
| 404 | * Update the {@link Progress} with the adequate {@link Object} received |
| 405 | * from the network via {@link RemoteLibraryServer}. |
| 406 | * |
| 407 | * @param pg |
| 408 | * the {@link Progress} to update |
| 409 | * @param rep |
| 410 | * the object received from the network |
| 411 | * |
| 412 | * @return TRUE if it was a progress event, FALSE if not |
| 413 | */ |
| 414 | static boolean updateProgress(Progress pg, Object rep) { |
| 415 | if (rep instanceof Integer[]) { |
| 416 | Integer[] a = (Integer[]) rep; |
| 417 | if (a.length == 3) { |
| 418 | int min = a[0]; |
| 419 | int max = a[1]; |
| 420 | int progress = a[2]; |
| 421 | |
| 422 | if (min >= 0 && min <= max) { |
| 423 | pg.setMinMax(min, max); |
| 424 | pg.setProgress(progress); |
| 425 | |
| 426 | return true; |
| 427 | } |
| 428 | } |
| 429 | } |
| 430 | |
| 431 | return false; |
| 432 | } |
| 433 | |
| 434 | /** |
| 435 | * Create a {@link Progress} that will forward its progress over the |
| 436 | * network. |
| 437 | * |
| 438 | * @param action |
| 439 | * the {@link ConnectActionServerObject} to use to forward it |
| 440 | * |
| 441 | * @return the {@link Progress} |
| 442 | */ |
| 443 | private Progress createPgForwarder(final ConnectActionServerObject action) { |
| 444 | final Boolean[] isDoneForwarded = new Boolean[] { false }; |
| 445 | final Progress pg = new Progress() { |
| 446 | @Override |
| 447 | public boolean isDone() { |
| 448 | return isDoneForwarded[0]; |
| 449 | } |
| 450 | }; |
| 451 | |
| 452 | final Integer[] p = new Integer[] { -1, -1, -1 }; |
| 453 | final Long[] lastTime = new Long[] { new Date().getTime() }; |
| 454 | pg.addProgressListener(new ProgressListener() { |
| 455 | @Override |
| 456 | public void progress(Progress progress, String name) { |
| 457 | int min = pg.getMin(); |
| 458 | int max = pg.getMax(); |
| 459 | int relativeProgress = min |
| 460 | + (int) Math.round(pg.getRelativeProgress() |
| 461 | * (max - min)); |
| 462 | |
| 463 | // Do not re-send the same value twice over the wire, |
| 464 | // unless more than 2 seconds have elapsed (to maintain the |
| 465 | // connection) |
| 466 | if ((p[0] != min || p[1] != max || p[2] != relativeProgress) |
| 467 | || (new Date().getTime() - lastTime[0] > 2000)) { |
| 468 | p[0] = min; |
| 469 | p[1] = max; |
| 470 | p[2] = relativeProgress; |
| 471 | |
| 472 | try { |
| 473 | action.send(new Integer[] { min, max, relativeProgress }); |
| 474 | action.rec(); |
| 475 | } catch (Exception e) { |
| 476 | getTraceHandler().error(e); |
| 477 | } |
| 478 | |
| 479 | lastTime[0] = new Date().getTime(); |
| 480 | } |
| 481 | |
| 482 | isDoneForwarded[0] = (pg.getProgress() >= pg.getMax()); |
| 483 | } |
| 484 | }); |
| 485 | |
| 486 | return pg; |
| 487 | } |
| 488 | |
| 489 | // with 30 seconds timeout |
| 490 | private void forcePgDoneSent(Progress pg) { |
| 491 | long start = new Date().getTime(); |
| 492 | pg.done(); |
| 493 | while (!pg.isDone() && new Date().getTime() - start < 30000) { |
| 494 | try { |
| 495 | Thread.sleep(100); |
| 496 | } catch (InterruptedException e) { |
| 497 | getTraceHandler().error(e); |
| 498 | } |
| 499 | } |
| 500 | } |
| 501 | } |