QT: How to get data from socket tcpserver at port 1000 - c++

Question

I listened the 1000 port with hercules terminal then the data came out.
Now I am coding the program in QT as below
void SocketTest::Test()
{
socket = new QTcpSocket(this);
connect(socket, SIGNAL(connected()), this, SLOT(connected()));
connect(socket, SIGNAL(disconnected()), this, SLOT(disconnected()));
connect(socket, SIGNAL(readyRead()), this, SLOT(readyRead()));
connect(socket, SIGNAL(bytesWritten(qint64)), this, SLOT(bytesWritten(qint64)));
qDebug()<<"Connect!";
socket->connectToHost("192.168.0.44",1000);
if (!socket->waitForConnected(3000))
{
qDebug()<<"error"<<socket->errorString();
}
}
and it shows- "socket operation timeout"
My host ip is 192.168.0.44 port 1000 and My computer ip is 192.168.0.5.
How can I get data as in figure 1 with QT? and please show me some examples because I am a noobie in this field.

Answer 1

According to the screenshot, 192.168.0.44 is the IP of the client, not the server. Try connecting to 192.168.0.5:1000 instead.

Answer 2

After connecting to the sever,the best approach is to receive data in an asynchronous mode by connecting the readyRead() signal of the socket to a slot :
connect( socket , SIGNAL(readyRead()),
this, SLOT(tcpReady()) );
From the Qt documentation :
This signal is emitted once every time new data is available for
reading from the device. It will only be emitted again once new data
is available, such as when a new payload of network data has arrived
on your network socket, or when a new block of data has been appended
to your device.
You can read data in the slot which is connected to readyRead signal :
void SocketTest::tcpReady()
{
unsigned long long bytesAvailable = socket->bytesAvailable();
char buf[bytesAvailable];
socket.read(buf, bytesAvailable);
for(int i=0;i<bytesAvailable;i++)
qDebug() << buf[i];
}

Answer 3

On your readyRead slot you can use the readAll() function to retrieve all data available on that socket.
If you need its as a char array, just use QByteArray::data();
Example connecting to Google:
Client::Client(QObject *parent) : QObject(parent)
{
socket = new QTcpSocket(this);
connect(socket, SIGNAL(readyRead()), SLOT(readyRead()));
socket->connectToHost("google.com", 80);
if (socket->waitForConnected())
socket->write("HEAD / HTTP/1.0\r\n\r\n\r\n");
}
void Client::readyRead()
{
QByteArray data = socket->readAll();
qDebug() << data.data(); //Gives a copy of the QByteArray as char array
}
And here you can see the result: