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Piped-Backend
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Handle pubsub with a de-duplicating queue

This commit is contained in:
Kavin 2023-08-31 09:21:25 +01:00
parent 938758b59f
commit 719c2460df
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2 changed files with 101 additions and 47 deletions
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48
src/main/java/me/kavin/piped/server/ServerLauncher.java
View File

@ -88,53 +88,7 @@ public class ServerLauncher extends MultithreadedHttpServerLauncher {
})).map(POST, "/webhooks/pubsub", AsyncServlet.ofBlocking(executor, request -> {
try {
SyndFeed feed = new SyndFeedInput().build(
new InputSource(new ByteArrayInputStream(request.loadBody().getResult().asArray())));
Multithreading.runAsyncLimited(() -> {
for (var entry : feed.getEntries()) {
String url = entry.getLinks().get(0).getHref();
String videoId = StringUtils.substring(url, -11);
try (StatelessSession s = DatabaseSessionFactory.createStatelessSession()) {
if (DatabaseHelper.doesVideoExist(s, videoId))
continue;
}
Multithreading.runAsyncLimited(() -> {
try {
Sentry.setExtra("videoId", videoId);
var extractor = YOUTUBE_SERVICE.getStreamExtractor("https://youtube.com/watch?v=" + videoId);
extractor.fetchPage();
Multithreading.runAsync(() -> {
DateWrapper uploadDate;
try {
uploadDate = extractor.getUploadDate();
} catch (ParsingException e) {
throw new RuntimeException(e);
}
if (uploadDate != null && System.currentTimeMillis() - uploadDate.offsetDateTime().toInstant().toEpochMilli() < TimeUnit.DAYS.toMillis(Constants.FEED_RETENTION)) {
try {
MatrixHelper.sendEvent("video.piped.stream.info", new FederatedVideoInfo(
StringUtils.substring(extractor.getUrl(), -11), StringUtils.substring(extractor.getUploaderUrl(), -24),
extractor.getName(),
extractor.getLength(), extractor.getViewCount())
);
} catch (Exception e) {
ExceptionHandler.handle(e);
}
}
});
VideoHelpers.handleNewVideo(extractor, entry.getPublishedDate().getTime(), null);
} catch (Exception e) {
ExceptionHandler.handle(e);
}
});
}
});
PubSubHandlers.handlePubSub(request.loadBody().getResult().asArray());
return HttpResponse.ofCode(204);

100
src/main/java/me/kavin/piped/server/handlers/PubSubHandlers.java Normal file
View File

@ -0,0 +1,100 @@
package me.kavin.piped.server.handlers;
import com.rometools.rome.feed.synd.SyndFeed;
import com.rometools.rome.io.SyndFeedInput;
import io.sentry.Sentry;
import me.kavin.piped.consts.Constants;
import me.kavin.piped.utils.*;
import me.kavin.piped.utils.obj.MatrixHelper;
import me.kavin.piped.utils.obj.federation.FederatedVideoInfo;
import org.apache.commons.lang3.StringUtils;
import org.hibernate.StatelessSession;
import org.schabi.newpipe.extractor.exceptions.ParsingException;
import org.schabi.newpipe.extractor.localization.DateWrapper;
import org.xml.sax.InputSource;
import java.io.ByteArrayInputStream;
import java.util.concurrent.LinkedBlockingQueue;
import java.util.concurrent.TimeUnit;
import static me.kavin.piped.consts.Constants.YOUTUBE_SERVICE;
public class PubSubHandlers {
private static final LinkedBlockingQueue<String> pubSubQueue = new LinkedBlockingQueue<>();
public static void handlePubSub(byte[] body) throws Exception {
SyndFeed feed = new SyndFeedInput().build(new InputSource(new ByteArrayInputStream(body)));
for (var entry : feed.getEntries()) {
String url = entry.getLinks().get(0).getHref();
String videoId = StringUtils.substring(url, -11);
long publishedDate = entry.getPublishedDate().getTime();
String str = videoId + ":" + publishedDate;
if (pubSubQueue.contains(str))
continue;
pubSubQueue.put(str);
}
}
static {
for (int i = 0; i < Runtime.getRuntime().availableProcessors(); i++) {
new Thread(() -> {
try {
while (true) {
String str = pubSubQueue.take();
String videoId = StringUtils.substringBefore(str, ":");
long publishedDate = Long.parseLong(StringUtils.substringAfter(str, ":"));
try (StatelessSession s = DatabaseSessionFactory.createStatelessSession()) {
if (DatabaseHelper.doesVideoExist(s, videoId))
continue;
}
try {
Sentry.setExtra("videoId", videoId);
var extractor = YOUTUBE_SERVICE.getStreamExtractor("https://youtube.com/watch?v=" + videoId);
extractor.fetchPage();
Multithreading.runAsync(() -> {
DateWrapper uploadDate;
try {
uploadDate = extractor.getUploadDate();
} catch (ParsingException e) {
throw new RuntimeException(e);
}
if (uploadDate != null && System.currentTimeMillis() - uploadDate.offsetDateTime().toInstant().toEpochMilli() < TimeUnit.DAYS.toMillis(Constants.FEED_RETENTION)) {
try {
MatrixHelper.sendEvent("video.piped.stream.info", new FederatedVideoInfo(
StringUtils.substring(extractor.getUrl(), -11), StringUtils.substring(extractor.getUploaderUrl(), -24),
extractor.getName(),
extractor.getLength(), extractor.getViewCount())
);
} catch (Exception e) {
ExceptionHandler.handle(e);
}
}
});
VideoHelpers.handleNewVideo(extractor, publishedDate, null);
} catch (Exception e) {
ExceptionHandler.handle(e);
}
}
} catch (Exception e) {
ExceptionHandler.handle(e);
}
}, "PubSub-Worker-" + i).start();
}
}
}