src/main/java/net/pterodactylus/sone/core/SoneDownloaderImpl.java

   1 /*
   2  * Sone - SoneDownloader.java - Copyright © 2010–2013 David Roden
   3  *
   4  * This program is free software: you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation, either version 3 of the License, or
   7  * (at your option) any later version.
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  16  */
  17
  18 package net.pterodactylus.sone.core;
  19
  20 import java.io.InputStream;
  21 import java.net.MalformedURLException;
  22 import java.util.ArrayList;
  23 import java.util.HashSet;
  24 import java.util.List;
  25 import java.util.Set;
  26 import java.util.logging.Level;
  27 import java.util.logging.Logger;
  28
  29 import net.pterodactylus.sone.core.FreenetInterface.Fetched;
  30 import net.pterodactylus.sone.data.Album;
  31 import net.pterodactylus.sone.data.Client;
  32 import net.pterodactylus.sone.data.Image;
  33 import net.pterodactylus.sone.data.Post;
  34 import net.pterodactylus.sone.data.PostReply;
  35 import net.pterodactylus.sone.data.Profile;
  36 import net.pterodactylus.sone.data.Sone;
  37 import net.pterodactylus.sone.data.Sone.SoneStatus;
  38 import net.pterodactylus.sone.data.SoneImpl;
  39 import net.pterodactylus.sone.database.PostBuilder;
  40 import net.pterodactylus.sone.database.PostReplyBuilder;
  41 import net.pterodactylus.util.io.Closer;
  42 import net.pterodactylus.util.logging.Logging;
  43 import net.pterodactylus.util.number.Numbers;
  44 import net.pterodactylus.util.service.AbstractService;
  45 import net.pterodactylus.util.xml.SimpleXML;
  46 import net.pterodactylus.util.xml.XML;
  47
  48 import freenet.client.FetchResult;
  49 import freenet.keys.FreenetURI;
  50 import freenet.support.api.Bucket;
  51
  52 import com.google.common.annotations.VisibleForTesting;
  53 import org.w3c.dom.Document;
  54
  55 /**
  56  * The Sone downloader is responsible for download Sones as they are updated.
  57  *
  58  * @author <a href="mailto:bombe@pterodactylus.net">David ‘Bombe’ Roden</a>
  59  */
  60 public class SoneDownloaderImpl extends AbstractService implements SoneDownloader {
  61
  62         /** The logger. */
  63         private static final Logger logger = Logging.getLogger(SoneDownloaderImpl.class);
  64
  65         /** The maximum protocol version. */
  66         private static final int MAX_PROTOCOL_VERSION = 0;
  67
  68         /** The core. */
  69         private final Core core;
  70
  71         /** The Freenet interface. */
  72         private final FreenetInterface freenetInterface;
  73
  74         /** The sones to update. */
  75         private final Set<Sone> sones = new HashSet<Sone>();
  76
  77         /**
  78          * Creates a new Sone downloader.
  79          *
  80          * @param core
  81          *              The core
  82          * @param freenetInterface
  83          *              The Freenet interface
  84          */
  85         public SoneDownloaderImpl(Core core, FreenetInterface freenetInterface) {
  86                 super("Sone Downloader", false);
  87                 this.core = core;
  88                 this.freenetInterface = freenetInterface;
  89         }
  90
  91         //
  92         // ACTIONS
  93         //
  94
  95         /**
  96          * Adds the given Sone to the set of Sones that will be watched for updates.
  97          *
  98          * @param sone
  99          *              The Sone to add
 100          */
 101         @Override
 102         public void addSone(Sone sone) {
 103                 if (!sones.add(sone)) {
 104                         freenetInterface.unregisterUsk(sone);
 105                 }
 106                 freenetInterface.registerUsk(sone, new SoneUpdater() {
 107                         @Override
 108                         public void updateSone(Sone sone, long edition) {
 109                                 if (edition > sone.getLatestEdition()) {
 110                                         sone.setLatestEdition(edition);
 111                                         new Thread(fetchSoneAction(sone),
 112                                                         "Sone Downloader").start();
 113                                 }
 114                         }
 115                 });
 116         }
 117
 118         private void fetchSone(Sone sone) {
 119                 fetchSone(sone, sone.getRequestUri().sskForUSK());
 120         }
 121
 122         /**
 123          * Fetches the updated Sone. This method can be used to fetch a Sone from a
 124          * specific URI.
 125          *
 126          * @param sone
 127          *              The Sone to fetch
 128          * @param soneUri
 129          *              The URI to fetch the Sone from
 130          */
 131         @Override
 132         public void fetchSone(Sone sone, FreenetURI soneUri) {
 133                 fetchSone(sone, soneUri, false);
 134         }
 135
 136         /**
 137          * Fetches the Sone from the given URI.
 138          *
 139          * @param sone
 140          *              The Sone to fetch
 141          * @param soneUri
 142          *              The URI of the Sone to fetch
 143          * @param fetchOnly
 144          *              {@code true} to only fetch and parse the Sone, {@code false}
 145          *              to {@link Core#updateSone(Sone) update} it in the core
 146          * @return The downloaded Sone, or {@code null} if the Sone could not be
 147          *         downloaded
 148          */
 149         @Override
 150         public Sone fetchSone(Sone sone, FreenetURI soneUri, boolean fetchOnly) {
 151                 logger.log(Level.FINE, String.format("Starting fetch for Sone “%s” from %s…", sone, soneUri));
 152                 FreenetURI requestUri = soneUri.setMetaString(new String[] { "sone.xml" });
 153                 sone.setStatus(SoneStatus.downloading);
 154                 try {
 155                         Fetched fetchResults = freenetInterface.fetchUri(requestUri);
 156                         if (fetchResults == null) {
 157                                 /* TODO - mark Sone as bad. */
 158                                 return null;
 159                         }
 160                         logger.log(Level.FINEST, String.format("Got %d bytes back.", fetchResults.getFetchResult().size()));
 161                         Sone parsedSone = parseSone(sone, fetchResults.getFetchResult(), fetchResults.getFreenetUri());
 162                         if (parsedSone != null) {
 163                                 if (!fetchOnly) {
 164                                         parsedSone.setStatus((parsedSone.getTime() == 0) ? SoneStatus.unknown : SoneStatus.idle);
 165                                         core.updateSone(parsedSone);
 166                                         addSone(parsedSone);
 167                                 }
 168                         }
 169                         return parsedSone;
 170                 } finally {
 171                         sone.setStatus((sone.getTime() == 0) ? SoneStatus.unknown : SoneStatus.idle);
 172                 }
 173         }
 174
 175         /**
 176          * Parses a Sone from a fetch result.
 177          *
 178          * @param originalSone
 179          *              The sone to parse, or {@code null} if the Sone is yet unknown
 180          * @param fetchResult
 181          *              The fetch result
 182          * @param requestUri
 183          *              The requested URI
 184          * @return The parsed Sone, or {@code null} if the Sone could not be parsed
 185          */
 186         private Sone parseSone(Sone originalSone, FetchResult fetchResult, FreenetURI requestUri) {
 187                 logger.log(Level.FINEST, String.format("Parsing FetchResult (%d bytes, %s) for %s…", fetchResult.size(), fetchResult.getMimeType(), originalSone));
 188                 Bucket soneBucket = fetchResult.asBucket();
 189                 InputStream soneInputStream = null;
 190                 try {
 191                         soneInputStream = soneBucket.getInputStream();
 192                         Sone parsedSone = parseSone(originalSone, soneInputStream);
 193                         if (parsedSone != null) {
 194                                 parsedSone.setLatestEdition(requestUri.getEdition());
 195                                 if (requestUri.getKeyType().equals("USK")) {
 196                                         parsedSone.setRequestUri(requestUri.setMetaString(new String[0]));
 197                                 } else {
 198                                         parsedSone.setRequestUri(requestUri.setKeyType("USK").setDocName("Sone").setMetaString(new String[0]));
 199                                 }
 200                         }
 201                         return parsedSone;
 202                 } catch (Exception e1) {
 203                         logger.log(Level.WARNING, String.format("Could not parse Sone from %s!", requestUri), e1);
 204                 } finally {
 205                         Closer.close(soneInputStream);
 206                         soneBucket.free();
 207                 }
 208                 return null;
 209         }
 210
 211         /**
 212          * Parses a Sone from the given input stream and creates a new Sone from the
 213          * parsed data.
 214          *
 215          * @param originalSone
 216          *              The Sone to update
 217          * @param soneInputStream
 218          *              The input stream to parse the Sone from
 219          * @return The parsed Sone
 220          * @throws SoneException
 221          *              if a parse error occurs, or the protocol is invalid
 222          */
 223         @VisibleForTesting
 224         protected Sone parseSone(Sone originalSone, InputStream soneInputStream) throws SoneException {
 225                 /* TODO - impose a size limit? */
 226
 227                 Document document;
 228                 /* XML parsing is not thread-safe. */
 229                 synchronized (this) {
 230                         document = XML.transformToDocument(soneInputStream);
 231                 }
 232                 if (document == null) {
 233                         /* TODO - mark Sone as bad. */
 234                         logger.log(Level.WARNING, String.format("Could not parse XML for Sone %s!", originalSone));
 235                         return null;
 236                 }
 237
 238                 Sone sone = new SoneImpl(originalSone.getId(), originalSone.isLocal()).setIdentity(originalSone.getIdentity());
 239
 240                 SimpleXML soneXml;
 241                 try {
 242                         soneXml = SimpleXML.fromDocument(document);
 243                 } catch (NullPointerException npe1) {
 244                         /* for some reason, invalid XML can cause NPEs. */
 245                         logger.log(Level.WARNING, String.format("XML for Sone %s can not be parsed!", sone), npe1);
 246                         return null;
 247                 }
 248
 249                 Integer protocolVersion = null;
 250                 String soneProtocolVersion = soneXml.getValue("protocol-version", null);
 251                 if (soneProtocolVersion != null) {
 252                         protocolVersion = Numbers.safeParseInteger(soneProtocolVersion);
 253                 }
 254                 if (protocolVersion == null) {
 255                         logger.log(Level.INFO, "No protocol version found, assuming 0.");
 256                         protocolVersion = 0;
 257                 }
 258
 259                 if (protocolVersion < 0) {
 260                         logger.log(Level.WARNING, String.format("Invalid protocol version: %d! Not parsing Sone.", protocolVersion));
 261                         return null;
 262                 }
 263
 264                 /* check for valid versions. */
 265                 if (protocolVersion > MAX_PROTOCOL_VERSION) {
 266                         logger.log(Level.WARNING, String.format("Unknown protocol version: %d! Not parsing Sone.", protocolVersion));
 267                         return null;
 268                 }
 269
 270                 String soneTime = soneXml.getValue("time", null);
 271                 if (soneTime == null) {
 272                         /* TODO - mark Sone as bad. */
 273                         logger.log(Level.WARNING, String.format("Downloaded time for Sone %s was null!", sone));
 274                         return null;
 275                 }
 276                 try {
 277                         sone.setTime(Long.parseLong(soneTime));
 278                 } catch (NumberFormatException nfe1) {
 279                         /* TODO - mark Sone as bad. */
 280                         logger.log(Level.WARNING, String.format("Downloaded Sone %s with invalid time: %s", sone, soneTime));
 281                         return null;
 282                 }
 283
 284                 SimpleXML clientXml = soneXml.getNode("client");
 285                 if (clientXml != null) {
 286                         String clientName = clientXml.getValue("name", null);
 287                         String clientVersion = clientXml.getValue("version", null);
 288                         if ((clientName == null) || (clientVersion == null)) {
 289                                 logger.log(Level.WARNING, String.format("Download Sone %s with client XML but missing name or version!", sone));
 290                                 return null;
 291                         }
 292                         sone.setClient(new Client(clientName, clientVersion));
 293                 }
 294
 295                 String soneRequestUri = soneXml.getValue("request-uri", null);
 296                 if (soneRequestUri != null) {
 297                         try {
 298                                 sone.setRequestUri(new FreenetURI(soneRequestUri));
 299                         } catch (MalformedURLException mue1) {
 300                                 /* TODO - mark Sone as bad. */
 301                                 logger.log(Level.WARNING, String.format("Downloaded Sone %s has invalid request URI: %s", sone, soneRequestUri), mue1);
 302                                 return null;
 303                         }
 304                 }
 305
 306                 if (originalSone.getInsertUri() != null) {
 307                         sone.setInsertUri(originalSone.getInsertUri());
 308                 }
 309
 310                 SimpleXML profileXml = soneXml.getNode("profile");
 311                 if (profileXml == null) {
 312                         /* TODO - mark Sone as bad. */
 313                         logger.log(Level.WARNING, String.format("Downloaded Sone %s has no profile!", sone));
 314                         return null;
 315                 }
 316
 317                 /* parse profile. */
 318                 String profileFirstName = profileXml.getValue("first-name", null);
 319                 String profileMiddleName = profileXml.getValue("middle-name", null);
 320                 String profileLastName = profileXml.getValue("last-name", null);
 321                 Integer profileBirthDay = Numbers.safeParseInteger(profileXml.getValue("birth-day", null));
 322                 Integer profileBirthMonth = Numbers.safeParseInteger(profileXml.getValue("birth-month", null));
 323                 Integer profileBirthYear = Numbers.safeParseInteger(profileXml.getValue("birth-year", null));
 324                 Profile profile = new Profile(sone).setFirstName(profileFirstName).setMiddleName(profileMiddleName).setLastName(profileLastName);
 325                 profile.setBirthDay(profileBirthDay).setBirthMonth(profileBirthMonth).setBirthYear(profileBirthYear);
 326                 /* avatar is processed after images are loaded. */
 327                 String avatarId = profileXml.getValue("avatar", null);
 328
 329                 /* parse profile fields. */
 330                 SimpleXML profileFieldsXml = profileXml.getNode("fields");
 331                 if (profileFieldsXml != null) {
 332                         for (SimpleXML fieldXml : profileFieldsXml.getNodes("field")) {
 333                                 String fieldName = fieldXml.getValue("field-name", null);
 334                                 String fieldValue = fieldXml.getValue("field-value", "");
 335                                 if (fieldName == null) {
 336                                         logger.log(Level.WARNING, String.format("Downloaded profile field for Sone %s with missing data! Name: %s, Value: %s", sone, fieldName, fieldValue));
 337                                         return null;
 338                                 }
 339                                 try {
 340                                         profile.addField(fieldName.trim()).setValue(fieldValue);
 341                                 } catch (IllegalArgumentException iae1) {
 342                                         logger.log(Level.WARNING, String.format("Duplicate field: %s", fieldName), iae1);
 343                                         return null;
 344                                 }
 345                         }
 346                 }
 347
 348                 /* parse posts. */
 349                 SimpleXML postsXml = soneXml.getNode("posts");
 350                 Set<Post> posts = new HashSet<Post>();
 351                 if (postsXml == null) {
 352                         /* TODO - mark Sone as bad. */
 353                         logger.log(Level.WARNING, String.format("Downloaded Sone %s has no posts!", sone));
 354                 } else {
 355                         for (SimpleXML postXml : postsXml.getNodes("post")) {
 356                                 String postId = postXml.getValue("id", null);
 357                                 String postRecipientId = postXml.getValue("recipient", null);
 358                                 String postTime = postXml.getValue("time", null);
 359                                 String postText = postXml.getValue("text", null);
 360                                 if ((postId == null) || (postTime == null) || (postText == null)) {
 361                                         /* TODO - mark Sone as bad. */
 362                                         logger.log(Level.WARNING, String.format("Downloaded post for Sone %s with missing data! ID: %s, Time: %s, Text: %s", sone, postId, postTime, postText));
 363                                         return null;
 364                                 }
 365                                 try {
 366                                         PostBuilder postBuilder = core.postBuilder();
 367                                         /* TODO - parse time correctly. */
 368                                         postBuilder.withId(postId).from(sone.getId()).withTime(Long.parseLong(postTime)).withText(postText);
 369                                         if ((postRecipientId != null) && (postRecipientId.length() == 43)) {
 370                                                 postBuilder.to(postRecipientId);
 371                                         }
 372                                         posts.add(postBuilder.build());
 373                                 } catch (NumberFormatException nfe1) {
 374                                         /* TODO - mark Sone as bad. */
 375                                         logger.log(Level.WARNING, String.format("Downloaded post for Sone %s with invalid time: %s", sone, postTime));
 376                                         return null;
 377                                 }
 378                         }
 379                 }
 380
 381                 /* parse replies. */
 382                 SimpleXML repliesXml = soneXml.getNode("replies");
 383                 Set<PostReply> replies = new HashSet<PostReply>();
 384                 if (repliesXml == null) {
 385                         /* TODO - mark Sone as bad. */
 386                         logger.log(Level.WARNING, String.format("Downloaded Sone %s has no replies!", sone));
 387                 } else {
 388                         for (SimpleXML replyXml : repliesXml.getNodes("reply")) {
 389                                 String replyId = replyXml.getValue("id", null);
 390                                 String replyPostId = replyXml.getValue("post-id", null);
 391                                 String replyTime = replyXml.getValue("time", null);
 392                                 String replyText = replyXml.getValue("text", null);
 393                                 if ((replyId == null) || (replyPostId == null) || (replyTime == null) || (replyText == null)) {
 394                                         /* TODO - mark Sone as bad. */
 395                                         logger.log(Level.WARNING, String.format("Downloaded reply for Sone %s with missing data! ID: %s, Post: %s, Time: %s, Text: %s", sone, replyId, replyPostId, replyTime, replyText));
 396                                         return null;
 397                                 }
 398                                 try {
 399                                         PostReplyBuilder postReplyBuilder = core.postReplyBuilder();
 400                                         /* TODO - parse time correctly. */
 401                                         postReplyBuilder.withId(replyId).from(sone.getId()).to(replyPostId).withTime(Long.parseLong(replyTime)).withText(replyText);
 402                                         replies.add(postReplyBuilder.build());
 403                                 } catch (NumberFormatException nfe1) {
 404                                         /* TODO - mark Sone as bad. */
 405                                         logger.log(Level.WARNING, String.format("Downloaded reply for Sone %s with invalid time: %s", sone, replyTime));
 406                                         return null;
 407                                 }
 408                         }
 409                 }
 410
 411                 /* parse liked post IDs. */
 412                 SimpleXML likePostIdsXml = soneXml.getNode("post-likes");
 413                 Set<String> likedPostIds = new HashSet<String>();
 414                 if (likePostIdsXml == null) {
 415                         /* TODO - mark Sone as bad. */
 416                         logger.log(Level.WARNING, String.format("Downloaded Sone %s has no post likes!", sone));
 417                 } else {
 418                         for (SimpleXML likedPostIdXml : likePostIdsXml.getNodes("post-like")) {
 419                                 String postId = likedPostIdXml.getValue();
 420                                 likedPostIds.add(postId);
 421                         }
 422                 }
 423
 424                 /* parse liked reply IDs. */
 425                 SimpleXML likeReplyIdsXml = soneXml.getNode("reply-likes");
 426                 Set<String> likedReplyIds = new HashSet<String>();
 427                 if (likeReplyIdsXml == null) {
 428                         /* TODO - mark Sone as bad. */
 429                         logger.log(Level.WARNING, String.format("Downloaded Sone %s has no reply likes!", sone));
 430                 } else {
 431                         for (SimpleXML likedReplyIdXml : likeReplyIdsXml.getNodes("reply-like")) {
 432                                 String replyId = likedReplyIdXml.getValue();
 433                                 likedReplyIds.add(replyId);
 434                         }
 435                 }
 436
 437                 /* parse albums. */
 438                 SimpleXML albumsXml = soneXml.getNode("albums");
 439                 List<Album> topLevelAlbums = new ArrayList<Album>();
 440                 if (albumsXml != null) {
 441                         for (SimpleXML albumXml : albumsXml.getNodes("album")) {
 442                                 String id = albumXml.getValue("id", null);
 443                                 String parentId = albumXml.getValue("parent", null);
 444                                 String title = albumXml.getValue("title", null);
 445                                 String description = albumXml.getValue("description", "");
 446                                 String albumImageId = albumXml.getValue("album-image", null);
 447                                 if ((id == null) || (title == null)) {
 448                                         logger.log(Level.WARNING, String.format("Downloaded Sone %s contains invalid album!", sone));
 449                                         return null;
 450                                 }
 451                                 Album parent = null;
 452                                 if (parentId != null) {
 453                                         parent = core.getAlbum(parentId);
 454                                         if (parent == null) {
 455                                                 logger.log(Level.WARNING, String.format("Downloaded Sone %s has album with invalid parent!", sone));
 456                                                 return null;
 457                                         }
 458                                 }
 459                                 Album album = core.albumBuilder()
 460                                                 .withId(id)
 461                                                 .by(sone)
 462                                                 .build()
 463                                                 .modify()
 464                                                 .setTitle(title)
 465                                                 .setDescription(description)
 466                                                 .update();
 467                                 if (parent != null) {
 468                                         parent.addAlbum(album);
 469                                 } else {
 470                                         topLevelAlbums.add(album);
 471                                 }
 472                                 SimpleXML imagesXml = albumXml.getNode("images");
 473                                 if (imagesXml != null) {
 474                                         for (SimpleXML imageXml : imagesXml.getNodes("image")) {
 475                                                 String imageId = imageXml.getValue("id", null);
 476                                                 String imageCreationTimeString = imageXml.getValue("creation-time", null);
 477                                                 String imageKey = imageXml.getValue("key", null);
 478                                                 String imageTitle = imageXml.getValue("title", null);
 479                                                 String imageDescription = imageXml.getValue("description", "");
 480                                                 String imageWidthString = imageXml.getValue("width", null);
 481                                                 String imageHeightString = imageXml.getValue("height", null);
 482                                                 if ((imageId == null) || (imageCreationTimeString == null) || (imageKey == null) || (imageTitle == null) || (imageWidthString == null) || (imageHeightString == null)) {
 483                                                         logger.log(Level.WARNING, String.format("Downloaded Sone %s contains invalid images!", sone));
 484                                                         return null;
 485                                                 }
 486                                                 long creationTime = Numbers.safeParseLong(imageCreationTimeString, 0L);
 487                                                 int imageWidth = Numbers.safeParseInteger(imageWidthString, 0);
 488                                                 int imageHeight = Numbers.safeParseInteger(imageHeightString, 0);
 489                                                 if ((imageWidth < 1) || (imageHeight < 1)) {
 490                                                         logger.log(Level.WARNING, String.format("Downloaded Sone %s contains image %s with invalid dimensions (%s, %s)!", sone, imageId, imageWidthString, imageHeightString));
 491                                                         return null;
 492                                                 }
 493                                                 Image image = core.getImage(imageId).modify().setSone(sone).setKey(imageKey).setCreationTime(creationTime).update();
 494                                                 image = image.modify().setTitle(imageTitle).setDescription(imageDescription).update();
 495                                                 image = image.modify().setWidth(imageWidth).setHeight(imageHeight).update();
 496                                                 album.addImage(image);
 497                                         }
 498                                 }
 499                                 album.modify().setAlbumImage(albumImageId).update();
 500                         }
 501                 }
 502
 503                 /* process avatar. */
 504                 if (avatarId != null) {
 505                         profile.setAvatar(core.getImage(avatarId, false));
 506                 }
 507
 508                 /* okay, apparently everything was parsed correctly. Now import. */
 509                 /* atomic setter operation on the Sone. */
 510                 synchronized (sone) {
 511                         sone.setProfile(profile);
 512                         sone.setPosts(posts);
 513                         sone.setReplies(replies);
 514                         sone.setLikePostIds(likedPostIds);
 515                         sone.setLikeReplyIds(likedReplyIds);
 516                         for (Album album : topLevelAlbums) {
 517                                 sone.getRootAlbum().addAlbum(album);
 518                         }
 519                 }
 520
 521                 return sone;
 522         }
 523
 524         @Override
 525         public Runnable fetchSoneWithUriAction(final Sone sone) {
 526                 return new Runnable() {
 527                         @Override
 528                         public void run() {
 529                                 fetchSone(sone, sone.getRequestUri());
 530                         }
 531                 };
 532         }
 533
 534         @Override
 535         public Runnable fetchSoneAction(final Sone sone) {
 536                 return new Runnable() {
 537                         @Override
 538                         public void run() {
 539                                 fetchSone(sone);
 540                         }
 541                 };
 542         }
 543
 544         /** {@inheritDoc} */
 545         @Override
 546         protected void serviceStop() {
 547                 for (Sone sone : sones) {
 548                         freenetInterface.unregisterUsk(sone);
 549                 }
 550         }
 551
 552 }