Qt cpp cant send obj to connected function - c++

Question

I need to get a json file from an url, fill it in a QtNetworkReply *reply and send reply in a connected fonction to convert it in QbyteArray to pars my Json response.
But when i go in my connected function, i cant fill QByteArray with that reply (always empty)
Here's my code :
int main(int ac, char *av[])
{
Borne borne(ac, av);
reply myReply;
QNetworkAccessManager networkManager;
QUrl url("http://vps202498.ovh.net:8080/ws/rest/v.1/stores/categories/150/products");
QNetworkRequest request;
request.setUrl(url);
myReply._reply = networkManager.get(request);
QObject::connect(myReply._reply, SIGNAL(finished()), &myReply, SLOT(fonction()));
myReply._reply->finished();
exit(1);
if (borne.initialize() == false)
return (false);
return (borne._app->exec());
}
And here's my connected function :
IProduct *reply::fonction()
{
QByteArray List;
std::cout << "connected" << std::endl;
List = _reply->readAll();
if (List.isNull())
exit(6);
return (NULL);
}
My .H :
class reply : public QObject
{
Q_OBJECT
public:
reply() {};
~reply() {};
QNetworkReply *_reply;
public slots:
IProduct *fonction();
private :
};
I cant std::cout "connected", but always quit with error log '6'.
I dont really know where am i doing mistake (Iam used to C, not Cpp), i've read all the man of Qt about it, and cant figure what going wrong.
Any ideas?
Thank you and apologize for weak skill and english

Answer 1

You call the finish() function manually immediately after creation of the request. In that moment the request is not even started, so there is nothing to read from _reply->readAll(). The reply finished signal should be called by the even loop after calling application exec().
Remove lines:
myReply._reply->finished();
exit(1);
The request will be processed asyncronously in the event loop.
Other issues:
the slot reply::fonction() does not need any retrun value;
the event loop may be not started because of (borne.initialize() == false).