instead of Qeventloop which method uset to wait for response

[iswaryasenthilkumar]

here below code i used QEventloop for waiting for response,,instead of QEventloop is there any method to wait for response ,can any one give me suggestion for this
Thanks in advance

QNetworkAccessManager manager;
    QNetworkReply *response = manager.get(QNetworkRequest(QUrl(url)));
    QEventLoop event;
    connect(response,SIGNAL(finished()),&event,SLOT(quit()));
    event.exec();
    QString html = response->readAll();

QNetworkAccessManager manager;
    QNetworkReply *response = manager.get(QNetworkRequest(QUrl(url)));
    QEventLoop event;
    connect(response,SIGNAL(finished()),&event,SLOT(quit()));
    event.exec();
    QString html = response->readAll();

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[yeye_olive]

That is the way to go if you want to wait for the reply to finish, although I am not sure if the finished() signal is always guaranteed to be emitted in case of error.

Unless this synchronous approach greatly simplifies the design of your application, I suggest you follow the asynchronous approach and partition your code into the part sending the request and the part handling the reply. E.g.

void MyObject::sendRequest(/* ... */) {
  // Send the request
  manager.get(QNetworkRequest(QUrl(url)));
  connect(&manager, SIGNAL(finished(QNetworkReply *)), SLOT(handleReply(QNetworkReply *)));
}
 
void MyObject::handleReply(QNetworkReply *reply) {
  // Handle the reply here
  QString html = reply->readAll();
  // ...
}

void MyObject::sendRequest(/* ... */) {
  // Send the request
  manager.get(QNetworkRequest(QUrl(url)));
  connect(&manager, SIGNAL(finished(QNetworkReply *)), SLOT(handleReply(QNetworkReply *)));
}

void MyObject::handleReply(QNetworkReply *reply) {
  // Handle the reply here
  QString html = reply->readAll();
  // ...
}

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Last but not least, you have not connected to readyRead(), which means that the reply may never emit finished() if it is large, and your event loop will run forever.

[iswaryasenthilkumar]

i need to wait for response,,i used your code but i got networkstatus=0,,while using eventloop my statuscode getting proper result.i should wait for response instead of using qeventloop.please help me

That is the way to go if you want to wait for the reply to finish, although I am not sure if the finished() signal is always guaranteed to be emitted in case of error.

Unless this synchronous approach greatly simplifies the design of your application, I suggest you follow the asynchronous approach and partition your code into the part sending the request and the part handling the reply. E.g.

void MyObject::sendRequest(/* ... */) {
  // Send the request
  manager.get(QNetworkRequest(QUrl(url)));
  connect(&manager, SIGNAL(finished(QNetworkReply *)), SLOT(handleReply(QNetworkReply *)));
}
 
void MyObject::handleReply(QNetworkReply *reply) {
  // Handle the reply here
  QString html = reply->readAll();
  // ...
}

void MyObject::sendRequest(/* ... */) {
  // Send the request
  manager.get(QNetworkRequest(QUrl(url)));
  connect(&manager, SIGNAL(finished(QNetworkReply *)), SLOT(handleReply(QNetworkReply *)));
}

void MyObject::handleReply(QNetworkReply *reply) {
  // Handle the reply here
  QString html = reply->readAll();
  // ...
}

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Last but not least, you have not connected to readyRead(), which means that the reply may never emit finished() if it is large, and your event loop will run forever.

[wysota]

What is wrong with using QEventLoop?

[anda_skoa]

i need to wait for response,,i used your code but i got networkstatus=0

Where do you get that?

Cheers,
_

[iswaryasenthilkumar]

while using QEventloop it wait for until i got response no other event will execute,,thats the problem,Thats why i asked is there any method to waiting process instead of QEventloop?

[wysota]

while using QEventloop it wait for until i got response no other event will execute

That's not true.

[iswaryasenthilkumar]

i havee doubt in this code can you explain please

QUrl url1(pic);
 QNetworkReply *response = manager.get(QNetworkRequest(QUrl(url1)));
 QEventLoop event;
  connect(response,SIGNAL(finished()),&event,SLOT(quit()));//this eventloop will quit untill it reaches finished,,if suppose we not get response from mangaer what will happen here,,event will still in waiting process to  quit am i correct.
  event.exec();

QUrl url1(pic);
 QNetworkReply *response = manager.get(QNetworkRequest(QUrl(url1)));
 QEventLoop event;
  connect(response,SIGNAL(finished()),&event,SLOT(quit()));//this eventloop will quit untill it reaches finished,,if suppose we not get response from mangaer what will happen here,,event will still in waiting process to  quit am i correct.
  event.exec();

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That's not true.

[anda_skoa]

Why are you going back to using an event loop after yeye_olive explained how you can do it without, the very question that is still the subject of this thread?

And yes, an event loop continues its execution until its quit() method is called.

Cheers,
_