QT网络

//网络发送日志数据类
QScopedPointer<SendLog> SendLog::self;
SendLog *SendLog::Instance()
{
    if (self.isNull()) {
        static QMutex mutex;
        QMutexLocker locker(&mutex);
        if (self.isNull()) {
            self.reset(new SendLog);
        }
    }

    return self.data();
}

SendLog::SendLog(QObject *parent) : QObject(parent)
{
    listenPort = 6000;
    socket = NULL;

    //实例化网络通信服务器对象
    server = new QTcpServer(this);
    connect(server, SIGNAL(newConnection()), this, SLOT(newConnection()));
}

SendLog::~SendLog()
{
    if (socket != NULL) {
        socket->disconnectFromHost();
    }

    server->close();
}

void SendLog::newConnection()
{
    //限定就一个连接
    while (server->hasPendingConnections()) {
        socket = server->nextPendingConnection();
    }
}

void SendLog::setListenPort(int listenPort)
{
    this->listenPort = listenPort;
}

void SendLog::start()
{
    //启动端口监听
#if (QT_VERSION >= QT_VERSION_CHECK(5,0,0))
    server->listen(QHostAddress::AnyIPv4, listenPort);
#else
    server->listen(QHostAddress::Any, listenPort);
#endif
}

void SendLog::stop()
{
    if (socket != NULL) {
        socket->disconnectFromHost();
        socket = NULL;
    }

    server->close();
}

void SendLog::send(const QString &content)
{
    if (socket != NULL && socket->isOpen()) {
        socket->write(content.toUtf8());
        //socket->flush();
    }