Qt 5.11 | Qt Bluetooth | Bluetooth Chat Example | chatserver.cpp Example File

Qt 5.11.3 Reference Documentation

# chatserver.cpp Example File

btchat/chatserver.cpp

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      #include "chatserver.h"

      #include <qbluetoothserver.h>
      #include <qbluetoothsocket.h>
      #include <qbluetoothlocaldevice.h>

      static const QLatin1String serviceUuid("e8e10f95-1a70-4b27-9ccf-02010264e9c8");

      ChatServer::ChatServer(QObject *parent)
      :   QObject(parent), rfcommServer(0)
      {
      }

      ChatServer::~ChatServer()
      {
          stopServer();
      }

      void ChatServer::startServer(const QBluetoothAddress& localAdapter)
      {
          if (rfcommServer)
              return;

          rfcommServer = new QBluetoothServer(QBluetoothServiceInfo::RfcommProtocol, this);
          connect(rfcommServer, SIGNAL(newConnection()), this, SLOT(clientConnected()));
          bool result = rfcommServer->listen(localAdapter);
          if (!result) {
              qWarning() << "Cannot bind chat server to" << localAdapter.toString();
              return;
          }

          //serviceInfo.setAttribute(QBluetoothServiceInfo::ServiceRecordHandle, (uint)0x00010010);

          QBluetoothServiceInfo::Sequence classId;

          classId << QVariant::fromValue(QBluetoothUuid(QBluetoothUuid::SerialPort));
          serviceInfo.setAttribute(QBluetoothServiceInfo::BluetoothProfileDescriptorList,
                                   classId);

          classId.prepend(QVariant::fromValue(QBluetoothUuid(serviceUuid)));

          serviceInfo.setAttribute(QBluetoothServiceInfo::ServiceClassIds, classId);

          serviceInfo.setAttribute(QBluetoothServiceInfo::ServiceName, tr("Bt Chat Server"));
          serviceInfo.setAttribute(QBluetoothServiceInfo::ServiceDescription,
                                   tr("Example bluetooth chat server"));
          serviceInfo.setAttribute(QBluetoothServiceInfo::ServiceProvider, tr("qt-project.org"));

          serviceInfo.setServiceUuid(QBluetoothUuid(serviceUuid));

          QBluetoothServiceInfo::Sequence publicBrowse;
          publicBrowse << QVariant::fromValue(QBluetoothUuid(QBluetoothUuid::PublicBrowseGroup));
          serviceInfo.setAttribute(QBluetoothServiceInfo::BrowseGroupList,
                                   publicBrowse);

          QBluetoothServiceInfo::Sequence protocolDescriptorList;
          QBluetoothServiceInfo::Sequence protocol;
          protocol << QVariant::fromValue(QBluetoothUuid(QBluetoothUuid::L2cap));
          protocolDescriptorList.append(QVariant::fromValue(protocol));
          protocol.clear();
          protocol << QVariant::fromValue(QBluetoothUuid(QBluetoothUuid::Rfcomm))
                   << QVariant::fromValue(quint8(rfcommServer->serverPort()));
          protocolDescriptorList.append(QVariant::fromValue(protocol));
          serviceInfo.setAttribute(QBluetoothServiceInfo::ProtocolDescriptorList,
                                   protocolDescriptorList);

          serviceInfo.registerService(localAdapter);
      }

      void ChatServer::stopServer()
      {
          // Unregister service
          serviceInfo.unregisterService();

          // Close sockets
          qDeleteAll(clientSockets);

          // Close server
          delete rfcommServer;
          rfcommServer = 0;
      }

      void ChatServer::sendMessage(const QString &message)
      {
          QByteArray text = message.toUtf8() + '\n';

          foreach (QBluetoothSocket *socket, clientSockets)
              socket->write(text);
      }

      void ChatServer::clientConnected()
      {
          QBluetoothSocket *socket = rfcommServer->nextPendingConnection();
          if (!socket)
              return;

          connect(socket, SIGNAL(readyRead()), this, SLOT(readSocket()));
          connect(socket, SIGNAL(disconnected()), this, SLOT(clientDisconnected()));
          clientSockets.append(socket);
          emit clientConnected(socket->peerName());
      }

      void ChatServer::clientDisconnected()
      {
          QBluetoothSocket *socket = qobject_cast<QBluetoothSocket *>(sender());
          if (!socket)
              return;

          emit clientDisconnected(socket->peerName());

          clientSockets.removeOne(socket);

          socket->deleteLater();
      }

      void ChatServer::readSocket()
      {
          QBluetoothSocket *socket = qobject_cast<QBluetoothSocket *>(sender());
          if (!socket)
              return;

          while (socket->canReadLine()) {
              QByteArray line = socket->readLine().trimmed();
              emit messageReceived(socket->peerName(),
                                   QString::fromUtf8(line.constData(), line.length()));
          }
      }