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#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)
{
length =0;
requestInterval =5*60;
requestIntervalTimer =-1;
firstTrackerRequest =true;
lastTrackerRequest =false;
firstSeeding =true;
connect(&http, SIGNAL(finished(QNetworkReply*)),this, SLOT(httpRequestDone(QNetworkReply*)));
}
void TrackerClient::start(const MetaInfo &info)
{
metaInfo = info;
QTimer::singleShot(0,this, SLOT(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->timerId() == requestIntervalTimer) {
fetchPeerList();
} else {
QObject::timerEvent(event);
}
}
void TrackerClient::fetchPeerList()
{
QUrl url(metaInfo.announceUrl());
// Base the query on announce url to include a passkey (if any)QUrlQuery query(url);
// Percent encode the hashQByteArray infoHash = torrentDownloader->infoHash();
QByteArray encodedSum;
for (int i =0; i < infoHash.size(); ++i) {
encodedSum +='%';
encodedSum +=QByteArray::number(infoHash[i],16).right(2).rightJustified(2,'0');
}
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;
} elseif (firstTrackerRequest) {
firstTrackerRequest =false;
query.addQueryItem("event","started");
} elseif(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, SIGNAL(authenticationRequired(QNetworkReply*,QAuthenticator*)),this, SLOT(provideAuthentication(QNetworkReply*,QAuthenticator*)));
}
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 presentemit failure(QString::fromUtf8(dict.value("failure reason").toByteArray()));
return;
}
if (dict.contains("warning message")) {
// continue processingemit 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 itemif (requestIntervalTimer !=-1)
killTimer(requestIntervalTimer);
requestIntervalTimer = startTimer(dict.value("interval").toInt() *1000);
}
if (dict.contains("peers")) {
// store it
peers.clear();
QVariant peerEntry = dict.value("peers");
if (peerEntry.type() ==QVariant::List) {
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);
}
