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# torrentserver.cpp Example File
network/torrent/torrentserver.cpp

     /****************************************************************************
     **
     ** Copyright (C) 2004-$THISYEAR$ $TROLLTECH$. All rights reserved.
     **
     ** This file is part of the $MODULE$ of the Qt Toolkit.
     **
     ** $TROLLTECH_DUAL_LICENSE$
     **
     ** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
     ** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
     **
     ****************************************************************************/

     #include "connectionmanager.h"
     #include "peerwireclient.h"
     #include "ratecontroller.h"
     #include "torrentclient.h"
     #include "torrentserver.h"

     Q_GLOBAL_STATIC(TorrentServer, torrentServer)

     TorrentServer *TorrentServer::instance()
     {
         return torrentServer();
     }

     void TorrentServer::addClient(TorrentClient *client)
     {
         clients << client;
     }

     void TorrentServer::removeClient(TorrentClient *client)
     {
         clients.removeAll(client);
     }

     void TorrentServer::incomingConnection(int socketDescriptor)
     {
         PeerWireClient *client =
             new PeerWireClient(ConnectionManager::instance()->clientId(), this);

         if (client->setSocketDescriptor(socketDescriptor)) {
             if (ConnectionManager::instance()->canAddConnection() && !clients.isEmpty()) {
                 connect(client, SIGNAL(infoHashReceived(const QByteArray &)),
                         this, SLOT(processInfoHash(const QByteArray &)));
                 connect(client, SIGNAL(error(QAbstractSocket::SocketError)),
                         this, SLOT(removeClient()));
                 RateController::instance()->addSocket(client);
                 ConnectionManager::instance()->addConnection(client);
                 return;
             }
         }
         client->abort();
         delete client;
     }

     void TorrentServer::removeClient()
     {
         PeerWireClient *peer = qobject_cast<PeerWireClient *>(sender());
         RateController::instance()->removeSocket(peer);
         ConnectionManager::instance()->removeConnection(peer);
         peer->deleteLater();
     }

     void TorrentServer::processInfoHash(const QByteArray &infoHash)
     {
         PeerWireClient *peer = qobject_cast<PeerWireClient *>(sender());
         foreach (TorrentClient *client, clients) {
             if (client->state() >= TorrentClient::Searching && client->infoHash() == infoHash) {
                 peer->disconnect(peer, 0, this, 0);
                 client->setupIncomingConnection(peer);
                 return;
             }
         }
         removeClient();
     }