QNetworkAccessManager issue - c++

Question

QString My_class::My_Method()
{
QNetworkAccessManager *manager= new QNetworkAccessManager(this);
connect(manager,SIGNAL(finished(QNetworkReply*)),this,SLOT(ReplayFinished(QNetworkReply*)));
manager->get(QNetworkRequest(QUrl(My_URL)));
return str;
}
void My_class::ReplayFinished(QNetworkReply *replay)
{
QString buffer;
if(replay->isOpen())
{
buffer=replay->readAll();
//treatment on the buffer and the public Qstring 'str'(declared in My_class.h) is updated
}
}
Hi,
the problem is that when calling the My_method() in the main, the QString str is empty because it was returned that way without waiting for the ReplayFinished to update it.
What could be the solution to wait until the job is complete so I can get the proper information, not skipping it and returning something else.
Thank you.

Answer 1

You can use an event loop to wait until the reply is finished and then read the available bytes and return the string :
QString My_class::My_Method()
{
QNetworkAccessManager manager;
QNetworkReply *reply = manager.get(QNetworkRequest(QUrl(My_URL)));
QEventLoop loop;
connect(reply, SIGNAL(finished()), &loop, SLOT(quit()));
connect(reply, SIGNAL(error(QNetworkReply::NetworkError)), &loop, SLOT(quit()));
loop.exec();
QByteArray bts = reply->readAll();
QString str(bts);
delete reply;
return str;
}