How to initialize a QNetworkAccessManager properly

Aymeric_Qt

Hello everyone,
As a very beginner 'sunday' Qt develloper I would like I have some questions about how to use the QNetworkAccessManager.

To summarize very briefly I have a very simple API and I would like to create a very simple Qt client.

As web developper my first idea is to seperate UI management and Http request management.
So first question: is that a good pratice in Qt?

Second question: the QNetworkAccessManager documentation says that one network access manager should be use for the entire application. So how should I initialize it ?

I've tried many ways but none of them worked except this one:
create a QNetworkAccessManager static variable
http_service.cpp:

#include "http_service.h"

static QNetworkAccessManager nam;

// constructor

QJsonDocument httpService::getBlob(QString url)
{
    QNetworkRequest request(url);
    request.setHeader(QNetworkRequest::ContentTypeHeader, "application/json");

    QNetworkReply *reply = nam.get(request);

    while (!reply->isFinished())
    {
        qApp->processEvents();
    }

    // processing response and returing it as QJsonDocument
}

//...other methods to handle other tyeo of request

It work but I have the feeling that it is not very "Qt compliant".

Thanks for reading.

SGaist

Hi and welcome to devnet

Just make it a member variable of the class that will be using it.

As for your separation of concerns, it's valid for all languages.

Aymeric_Qt

Hello SGaist,

Thank you very much for your answer.

I was sure I've already tried to make it a member variable of the class and having some error. Not a the compilation but when I tried to launch the app (app was ended forcefully as the messages read).
I had to make a mistake at the time but I can remmber I've done differently.

Anyway now it's working, thank you!