- Qt 5.5
- Qt Bluetooth
- Bluetooth Chat Example
- chatserver.cpp Example File
- Qt 5.5.1 Reference Documentation

# chatserver.cpp Example File

btchat/chatserver.cpp

    /****************************************************************************
    **
    ** Copyright (C) 2015 The Qt Company Ltd.
    ** Contact: http://www.qt.io/licensing/
    **
    ** This file is part of the QtBluetooth module of the Qt Toolkit.
    **
    ** $QT_BEGIN_LICENSE:BSD$
    ** You may use this file under the terms of the BSD license as follows:
    **
    ** "Redistribution and use in source and binary forms, with or without
    ** modification, are permitted provided that the following conditions are
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    **   * Redistributions of source code must retain the above copyright
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    **     contributors may be used to endorse or promote products derived
    **     from this software without specific prior written permission.
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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::BluetoothProfileDescriptorList,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()));
        }
    }