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# trackerclient.h Example File
network/torrent/trackerclient.h

    /****************************************************************************
    **
    ** Copyright (C) 2004-2006 Trolltech ASA. All rights reserved.
    **
    ** This file is part of the example classes of the Qt Toolkit.
    **
    ** Licensees holding valid Qt Preview licenses may use this file in
    ** accordance with the Qt Preview License Agreement provided with the
    ** Software.
    **
    ** See http://www.trolltech.com/pricing.html or email sales@trolltech.com for
    ** information about Qt Commercial License Agreements.
    **
    ** Contact info@trolltech.com if any conditions of this licensing are
    ** not clear to you.
    **
    ** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
    ** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
    **
    ****************************************************************************/

    #ifndef TRACKERCLIENT_H
    #define TRACKERCLIENT_H

    #include <QByteArray>
    #include <QList>
    #include <QObject>
    #include <QHostAddress>
    #include <QHttp>

    #include "metainfo.h"
    #include "torrentclient.h"

    class TorrentClient;

    class TrackerClient : public QObject
    {
        Q_OBJECT

    public:
        TrackerClient(TorrentClient *downloader, QObject *parent = 0);

        void start(const MetaInfo &info);
        void stop();

        inline qint64 uploadCount() const { return uploadedBytes; }
        inline qint64 downloadCount() const { return downloadedBytes; }
        inline void setUploadCount(qint64 bytes) { uploadedBytes = bytes; }
        inline void setDownloadCount(qint64 bytes) { downloadedBytes = bytes; }

    signals:
        void connectionError(QHttp::Error error);

        void failure(const QString &reason);
        void warning(const QString &message);
        void peerListUpdated(const QList<TorrentPeer> &peerList);

        void uploadCountUpdated(qint64 newUploadCount);
        void downloadCountUpdated(qint64 newDownloadCount);

        void stopped();

    protected:
        void timerEvent(QTimerEvent *event);

    private slots:
        void fetchPeerList();
        void httpRequestDone(bool error);

    private:
        TorrentClient *torrentDownloader;

        int requestInterval;
        int requestIntervalTimer;
        QHttp http;
        MetaInfo metaInfo;
        QByteArray trackerId;
        QList<TorrentPeer> peers;
        qint64 uploadedBytes;
        qint64 downloadedBytes;
        qint64 length;

        bool firstTrackerRequest;
        bool lastTrackerRequest;
    };

    #endif