2 * Sone - SoneDownloader.java - Copyright © 2010–2013 David Roden
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.
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.
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/>.
18 package net.pterodactylus.sone.core;
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;
26 import java.util.logging.Level;
27 import java.util.logging.Logger;
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;
48 import freenet.client.FetchResult;
49 import freenet.keys.FreenetURI;
50 import freenet.support.api.Bucket;
52 import com.google.common.annotations.VisibleForTesting;
53 import org.w3c.dom.Document;
56 * The Sone downloader is responsible for download Sones as they are updated.
58 * @author <a href="mailto:bombe@pterodactylus.net">David ‘Bombe’ Roden</a>
60 public class SoneDownloaderImpl extends AbstractService implements SoneDownloader {
63 private static final Logger logger = Logging.getLogger(SoneDownloaderImpl.class);
65 /** The maximum protocol version. */
66 private static final int MAX_PROTOCOL_VERSION = 0;
69 private final Core core;
71 /** The Freenet interface. */
72 private final FreenetInterface freenetInterface;
74 /** The sones to update. */
75 private final Set<Sone> sones = new HashSet<Sone>();
78 * Creates a new Sone downloader.
82 * @param freenetInterface
83 * The Freenet interface
85 public SoneDownloaderImpl(Core core, FreenetInterface freenetInterface) {
86 super("Sone Downloader", false);
88 this.freenetInterface = freenetInterface;
96 * Adds the given Sone to the set of Sones that will be watched for updates.
102 public void addSone(Sone sone) {
103 if (!sones.add(sone)) {
104 freenetInterface.unregisterUsk(sone);
106 freenetInterface.registerUsk(sone, new SoneUpdater() {
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();
118 private void fetchSone(Sone sone) {
119 fetchSone(sone, sone.getRequestUri().sskForUSK());
123 * Fetches the updated Sone. This method can be used to fetch a Sone from a
129 * The URI to fetch the Sone from
132 public void fetchSone(Sone sone, FreenetURI soneUri) {
133 fetchSone(sone, soneUri, false);
137 * Fetches the Sone from the given URI.
142 * The URI of the Sone to fetch
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
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);
155 Fetched fetchResults = freenetInterface.fetchUri(requestUri);
156 if (fetchResults == null) {
157 /* TODO - mark Sone as bad. */
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) {
164 parsedSone.setStatus((parsedSone.getTime() == 0) ? SoneStatus.unknown : SoneStatus.idle);
165 core.updateSone(parsedSone);
171 sone.setStatus((sone.getTime() == 0) ? SoneStatus.unknown : SoneStatus.idle);
176 * Parses a Sone from a fetch result.
178 * @param originalSone
179 * The sone to parse, or {@code null} if the Sone is yet unknown
184 * @return The parsed Sone, or {@code null} if the Sone could not be parsed
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;
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]));
198 parsedSone.setRequestUri(requestUri.setKeyType("USK").setDocName("Sone").setMetaString(new String[0]));
202 } catch (Exception e1) {
203 logger.log(Level.WARNING, String.format("Could not parse Sone from %s!", requestUri), e1);
205 Closer.close(soneInputStream);
212 * Parses a Sone from the given input stream and creates a new Sone from the
215 * @param originalSone
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
224 protected Sone parseSone(Sone originalSone, InputStream soneInputStream) throws SoneException {
225 /* TODO - impose a size limit? */
228 /* XML parsing is not thread-safe. */
229 synchronized (this) {
230 document = XML.transformToDocument(soneInputStream);
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));
238 Sone sone = new SoneImpl(originalSone.getId(), originalSone.isLocal()).setIdentity(originalSone.getIdentity());
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);
249 Integer protocolVersion = null;
250 String soneProtocolVersion = soneXml.getValue("protocol-version", null);
251 if (soneProtocolVersion != null) {
252 protocolVersion = Numbers.safeParseInteger(soneProtocolVersion);
254 if (protocolVersion == null) {
255 logger.log(Level.INFO, "No protocol version found, assuming 0.");
259 if (protocolVersion < 0) {
260 logger.log(Level.WARNING, String.format("Invalid protocol version: %d! Not parsing Sone.", protocolVersion));
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));
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));
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));
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));
292 sone.setClient(new Client(clientName, clientVersion));
295 String soneRequestUri = soneXml.getValue("request-uri", null);
296 if (soneRequestUri != null) {
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);
306 if (originalSone.getInsertUri() != null) {
307 sone.setInsertUri(originalSone.getInsertUri());
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));
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);
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));
340 profile.addField(fieldName.trim()).setValue(fieldValue);
341 } catch (IllegalArgumentException iae1) {
342 logger.log(Level.WARNING, String.format("Duplicate field: %s", fieldName), iae1);
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));
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));
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);
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));
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));
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));
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));
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));
418 for (SimpleXML likedPostIdXml : likePostIdsXml.getNodes("post-like")) {
419 String postId = likedPostIdXml.getValue();
420 likedPostIds.add(postId);
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));
431 for (SimpleXML likedReplyIdXml : likeReplyIdsXml.getNodes("reply-like")) {
432 String replyId = likedReplyIdXml.getValue();
433 likedReplyIds.add(replyId);
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));
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));
459 Album album = core.albumBuilder()
465 .setDescription(description)
467 if (parent != null) {
468 parent.addAlbum(album);
470 topLevelAlbums.add(album);
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));
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));
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);
499 album.modify().setAlbumImage(albumImageId).update();
503 /* process avatar. */
504 if (avatarId != null) {
505 profile.setAvatar(core.getImage(avatarId, false));
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);
525 public Runnable fetchSoneWithUriAction(final Sone sone) {
526 return new Runnable() {
529 fetchSone(sone, sone.getRequestUri());
535 public Runnable fetchSoneAction(final Sone sone) {
536 return new Runnable() {
546 protected void serviceStop() {
547 for (Sone sone : sones) {
548 freenetInterface.unregisterUsk(sone);