Revision control
++ // Copyright (C) 2016 The Qt Company Ltd.
++ // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
++
++ #include "bencodeparser.h"
++ #include "connectionmanager.h"
++ #include "torrentclient.h"
++ #include "torrentserver.h"
++ #include "trackerclient.h"
++
++ #include <QtCore>
++ #include <QNetworkRequest>
++
++ TrackerClient::TrackerClient(TorrentClient *downloader, QObject *parent)
++ : QObject(parent), torrentDownloader(downloader)
++ {
++ connect(&http, &QNetworkAccessManager::finished,
++ this, &TrackerClient::httpRequestDone);
++ }
++
++ void TrackerClient::start(const MetaInfo &info)
++ {
++ metaInfo = info;
++ QTimer::singleShot(0, this, &TrackerClient::fetchPeerList);
++
++ if (metaInfo.fileForm() == MetaInfo::SingleFileForm) {
++ length = metaInfo.singleFile().length;
++ } else {
++ QList<MetaInfoMultiFile> files = metaInfo.multiFiles();
++ for (int i = 0; i < files.size(); ++i)
++ length += files.at(i).length;
++ }
++ }
++
++ void TrackerClient::startSeeding()
++ {
++ firstSeeding = true;
++ fetchPeerList();
++ }
++
++ void TrackerClient::stop()
++ {
++ lastTrackerRequest = true;
++ fetchPeerList();
++ }
++
++ void TrackerClient::timerEvent(QTimerEvent *event)
++ {
++ if (event->id() == requestIntervalTimer.id()) {
++ fetchPeerList();
++ } else {
++ QObject::timerEvent(event);
++ }
++ }
++
++ void TrackerClient::fetchPeerList()
++ {
++ if (metaInfo.announceUrl().isEmpty())
++ return;
++ QUrl url(metaInfo.announceUrl());
++
++ // Base the query on announce url to include a passkey (if any)
++ QUrlQuery query(url);
++
++ // Percent encode the hash
++ const QByteArray infoHash = torrentDownloader->infoHash();
++ const QByteArray encodedSum = infoHash.toPercentEncoding();
++
++ bool seeding = (torrentDownloader->state() == TorrentClient::Seeding);
++
++ query.addQueryItem("info_hash", encodedSum);
++ query.addQueryItem("peer_id", ConnectionManager::instance()->clientId());
++ query.addQueryItem("port", QByteArray::number(TorrentServer::instance()->serverPort()));
++ query.addQueryItem("compact", "1");
++ query.addQueryItem("uploaded", QByteArray::number(torrentDownloader->uploadedBytes()));
++
++ if (!firstSeeding) {
++ query.addQueryItem("downloaded", "0");
++ query.addQueryItem("left", "0");
++ } else {
++ query.addQueryItem("downloaded",
++ QByteArray::number(torrentDownloader->downloadedBytes()));
++ int left = qMax<int>(0, metaInfo.totalSize() - torrentDownloader->downloadedBytes());
++ query.addQueryItem("left", QByteArray::number(seeding ? 0 : left));
++ }
++
++ if (seeding && firstSeeding) {
++ query.addQueryItem("event", "completed");
++ firstSeeding = false;
++ } else if (firstTrackerRequest) {
++ firstTrackerRequest = false;
++ query.addQueryItem("event", "started");
++ } else if(lastTrackerRequest) {
++ query.addQueryItem("event", "stopped");
++ }
++
++ if (!trackerId.isEmpty())
++ query.addQueryItem("trackerid", trackerId);
++
++ url.setQuery(query);
++
++ QNetworkRequest req(url);
++ if (!url.userName().isEmpty()) {
++ uname = url.userName();
++ pwd = url.password();
++ connect(&http, &QNetworkAccessManager::authenticationRequired,
++ this, &TrackerClient::provideAuthentication);
++ }
++ http.get(req);
++ }
++
++ void TrackerClient::httpRequestDone(QNetworkReply *reply)
++ {
++ reply->deleteLater();
++ if (lastTrackerRequest) {
++ emit stopped();
++ return;
++ }
++
++ if (reply->error() != QNetworkReply::NoError) {
++ emit connectionError(reply->error());
++ return;
++ }
++
++ QByteArray response = reply->readAll();
++ reply->abort();
++
++ BencodeParser parser;
++ if (!parser.parse(response)) {
++ qWarning("Error parsing bencode response from tracker: %s",
++ qPrintable(parser.errorString()));
++ return;
++ }
++
++ QMap<QByteArray, QVariant> dict = parser.dictionary();
++
++ if (dict.contains("failure reason")) {
++ // no other items are present
++ emit failure(QString::fromUtf8(dict.value("failure reason").toByteArray()));
++ return;
++ }
++
++ if (dict.contains("warning message")) {
++ // continue processing
++ emit warning(QString::fromUtf8(dict.value("warning message").toByteArray()));
++ }
++
++ if (dict.contains("tracker id")) {
++ // store it
++ trackerId = dict.value("tracker id").toByteArray();
++ }
++
++ if (dict.contains("interval")) {
++ // Mandatory item
++ requestIntervalTimer.start(std::chrono::seconds(dict.value("interval").toInt()), this);
++ }
++
++ if (dict.contains("peers")) {
++ // store it
++ peers.clear();
++ QVariant peerEntry = dict.value("peers");
++ if (peerEntry.userType() == QMetaType::QVariantList) {
++ QList<QVariant> peerTmp = peerEntry.toList();
++ for (int i = 0; i < peerTmp.size(); ++i) {
++ TorrentPeer tmp;
++ QMap<QByteArray, QVariant> peer = qvariant_cast<QMap<QByteArray, QVariant> >(peerTmp.at(i));
++ tmp.id = QString::fromUtf8(peer.value("peer id").toByteArray());
++ tmp.address.setAddress(QString::fromUtf8(peer.value("ip").toByteArray()));
++ tmp.port = peer.value("port").toInt();
++ peers << tmp;
++ }
++ } else {
++ QByteArray peerTmp = peerEntry.toByteArray();
++ for (int i = 0; i < peerTmp.size(); i += 6) {
++ TorrentPeer tmp;
++ uchar *data = (uchar *)peerTmp.constData() + i;
++ tmp.port = (int(data[4]) << 8) + data[5];
++ uint ipAddress = 0;
++ ipAddress += uint(data[0]) << 24;
++ ipAddress += uint(data[1]) << 16;
++ ipAddress += uint(data[2]) << 8;
++ ipAddress += uint(data[3]);
++ tmp.address.setAddress(ipAddress);
++ peers << tmp;
++ }
++ }
++ emit peerListUpdated(peers);
++ }
++ }
++
++ void TrackerClient::provideAuthentication(QNetworkReply *reply, QAuthenticator *auth)
++ {
++ Q_UNUSED(reply);
++ auth->setUser(uname);
++ auth->setPassword(pwd);
++ }