Qextserialport breaks my xml - qt

Question

I am trying to rewrite in c++ an application written in python.
All it does is to open a serial port and read some xml. In python i was using pyserial to read the xml and beautifulsoup to retrieve information. The output was like this.
<file><property>xx32</property></file>
Now i am using qextserialport to read from the serial port and the xml i get is something like this.
<
fil
e>
<prope
rty>xx32
</prop
erty>
</
file>
My problem is that i cant parse an xml like this. I get errors.
EDIT:
Qextserialport reads data from the serial port in set of bytes that are not fixed.
So how do i concatenate my xml into one string? I get an xml string every 4-5 seconds from the serial port.
here is my code
this->port = new QextSerialPort(com_port,QextSerialPort::EventDriven);
port->setBaudRate(BAUD57600);
port->setFlowControl(FLOW_OFF);
port->setParity(PAR_NONE);
port->setDataBits(DATA_8);
port->setStopBits(STOP_1);
port->setTimeout(0);
if (port->open(QIODevice::ReadOnly) == true)
{
//qDebug()<< "hello";
connect(port,SIGNAL(readyRead()),this,SLOT(onReadyRead()));
}
and the function that actually reads from the serial port
void CurrentCost::onReadyRead()
{
QByteArray bytes;
bytes = port->readAll();
//qDebug() << "bytes read:" << bytes.size();
//qDebug() << "bytes:" << bytes;
ui->textBrowser->append(bytes);
}

Answer 1

I mean something like this:
class CurrentCost...{
private:
QByteArray xmlData;
private slots:
void onReadyRead();
};
void CurrentCost::onReadyRead()
{
xmlData.append(port->readAll());
if(xmlData.endsWith(/*what your port sending then xml is over&*/))
{
ui->textBrowser->append(xmlData);
xmlData.clear();
}
}