QTcpServer - different behvaior in debug & release

reezeus

I don't think I can run my Qt code in VS, I believe I first need to install the VS plugin for Qt?
I've never compiled Qt code with VS, I use Qt only with Qt creator.

mrjj

@reezeus
Ok. well if u run from in Creator in release mode, it also does this?

reezeus

Yes, same behavior..

mrjj

@reezeus
can you reproduce this in small sample?
Might be a bug then.

reezeus

Sure, will do this when I have some time. Where should I upload the files?

mrjj

@reezeus
There is no upload function here.
I use dropbox as it very easy to share.

But if sample very small, its fine to post directly.

reezeus

.h file:
#ifndef IPSERVER
#define IPSERVER
#define HEADER_FENSERVEUR

#include <QtWidgets>
#include <QtNetwork>
#include "emailoutlook.h"

class IPServer : public QWidget
{
Q_OBJECT

public:
    IPServer();
    void SendToAll(const QString &message);

private slots:
    void NewConnection();
    void DataReceived();
    void DisconnectClient();

private:
    EmailOutlook outApp;
    QTcpServer *server;
    QList<QTcpSocket *> clients;
    quint16 sizeMessage;

};

#endif // IPSERVER

.cpp file:
#include "ipserver.h"

IPServer::IPServer()
{
outApp = EmailOutlook();
server = new QTcpServer(this);
if (!server->listen(QHostAddress::Any, 50869))
{
qDebug() << "Server cound not start" + server->errorString();
}
else
{
qDebug() << "Server has started on port " + QString::number(server->serverPort()) + ". Clients can now connect.";
connect(server, SIGNAL(newConnection()), this, SLOT(NewConnection()));
}

sizeMessage = 0;

}

void IPServer::NewConnection()
{
//SendToAll("New Client connected");

QTcpSocket *newClient = server->nextPendingConnection();
clients << newClient;
SendToAll("New Client connected");
connect(newClient, SIGNAL(readyRead()), this, SLOT(DataReceived()));
connect(newClient, SIGNAL(disconnected()), this, SLOT(DisconnectClient()));

}

void IPServer::DataReceived()
{
QTcpSocket *socket = qobject_cast<QTcpSocket *>(sender());
if (socket == 0)
return;

QDataStream in(socket);

if (sizeMessage == 0)
{
    if (socket->bytesAvailable() < (int)sizeof(quint16))
         return;

    in >> sizeMessage;
}

if (socket->bytesAvailable() < sizeMessage)
    return;

QString message;
in >> message;

SendToAll(message);

sizeMessage = 0;

}

void IPServer::DisconnectClient()
{
SendToAll("New client disconnected");

QTcpSocket *socket = qobject_cast<QTcpSocket *>(sender());
if (socket == 0)
    return;

clients.removeOne(socket);
socket->deleteLater();

}

void IPServer::SendToAll(const QString &message)
{
QByteArray paquet;
QDataStream out(&paquet, QIODevice::WriteOnly);

out << (quint16) 0;
out << message;
out.device()->seek(0);
out << (quint16) (paquet.size() - sizeof(quint16));

for (int i = 0; i < clients.size(); i++)
{
    clients[i]->write(paquet);
}

}

The IPServer class is initialized from another class:
IPServer *myServer;
myServer = new IPServer();

mrjj

ok.
This code can someone else run and see if it can reproduced on other pc?

reezeus

I have recompiled on another PC with Qt version 5.5.0 (still mvsc2013 compiler) and it works fine; debug, release & deployed.

mrjj

@reezeus said:
so it seems to be Qt 5.5.1 related ?
I dont have VS compiler so cant check here.

reezeus

It could be. Although it was working fine in previous release with Qt 5.5.1.