[SOLVED] QTcpSocket would not receiving all data

Gundi

All I am working on with some of the QT Networking tools to send data between two laptops. I am having an issue where QTcpSocket does not seem to receive all the data sent. I have used wireshark and check bytes written (from server) returned from the socket-> write function. It is strange because one execution I will get all 4999 packets (all packets) and if I execute it again it will receive only 2920 packets. I have tried to implement all the tips from other threads but I am clearly missing something. Here is my code and any help is appreciated

Server Side Writing the data

@
void TcpServer::writeData()
{
QByteArray test;

for(int ctr = 1; ctr < 5000; ctr++)
{
    test.append("A");
}

qDebug() << "Inside Write";

QTcpSocket *socket = new QTcpSocket(this);
socket->connectToHost(QHostAddress("156.80.124.103"), 1234);
qint64 bytes = socket->write(test);
socket->waitForBytesWritten();
socket->close();

qDebug() << "Bytes written = " << bytes;

}
@

One the client side I am reading the data back in.

@
void myServer::newConnection()
{
qDebug() << "Detected Connection";
QByteArray testing;
QTcpSocket *socket = server->nextPendingConnection();
qDebug() << "Wait for connect = " << socket->waitForConnected();

if(socket->waitForReadyRead(3000))
{
    while(socket->bytesAvailable() > 0)
    {
        testing.append(socket->readAll());
        socket->flush();
    }
}
else
{
    qDebug() << "ReadyReady Timed out";
}
qDebug() << "Final Testing is size = " << testing.size();
socket->deleteLater();

}
@

mcosta

HI,

try with

@void myServer::newConnection()
{
qDebug() << "Detected Connection";
QByteArray testing;
QTcpSocket *socket = server->nextPendingConnection();
qDebug() << "Wait for connect = " << socket->waitForConnected();

while (socket->waitForReadyRead(3000))
{
    while(socket->bytesAvailable() > 0)
    {
        testing.append(socket->readAll());
        socket->flush();
    }
}
qDebug() << "ReadyReady Timed out";
qDebug() << "Final Testing is size = " << testing.size();
socket->deleteLater();

}@

this why once you read all data from socket more data can arrive

Gundi

Thank you for the response. The first time I get 4999 and the second time with the else removed I still get 2920. Very strange. the output of the debug for two executions reads as follows.

Server Started
Detected Connection
Wait for connect = true
Final Testing is size = 4999
Detected Connection
Wait for connect = true
Final Testing is size = 2920

I just don't get why it would run once but have issues the second time. No matter how many times I run it after the initial run its 2920 packets. Strange

Gundi

Thank you that worked. The while loop on the waitForReady. Thank you so much!