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I would like to get application output: Bid value is (2248.18).
Here is code:
int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
    MainWindow w;
    w.show();
    QNetworkAccessManager m_manager;
   // make request
    QNetworkRequest request = QNetworkRequest(QUrl("https://api.30.bossa.pl/API/GPW/v2/Q/C/_cat_name/WIG20?_t=1637005413888"));
     QNetworkReply* reply = m_manager.get(request);
     QObject::connect(reply, &QNetworkReply::finished, [reply]() {
       QByteArray rawData = reply->readAll();
       QString textData(rawData);
//       qDebug() << textData;
       QJsonDocument doc = QJsonDocument::fromJson(textData.toUtf8());
           auto rootObj = doc.object();
           auto _d = rootObj.value("_d").toArray();
           auto _t = _d[0].toObject().value("_t").toArray();
           auto _quote = _t[0].toObject().value(QString("_quote"));
           qDebug() << _quote;

       reply->deleteLater(); // make sure to clean up
     });
    return a.exec();
}


Now i get:
QJsonValue(string, "2248.18")


What I have tried:

I've tried make:
QJsonObject obj = doc.object();
     qDebug() << obj;
     QJsonValue value = obj.value(QString("_quote"));
     qDebug() << obj.value(QString("_quote"));;
     qDebug() << "Bid value is" << value.toString();;

but i get errors, what should i do?
Posted
Comments
Richard MacCutchan 21-Nov-21 11:08am
   
"but i get errors, what should i do?"
Tell us what the errors are, and where they occur.
Oine 73 21-Nov-21 13:07pm
   
When i use this code:
QJsonObject obj = doc.object();
qDebug() << obj;
QJsonValue value = obj.value(QString("_quote"));
qDebug() << obj.value(QString("_quote"));;
qDebug() << "Bid value is" << value.toString();;

it makes whole document as an object and then takes value from it but "_quote" isn't in main root of document, so after that in application output it gives: QJsonValue (undefined).

That's why i've made:
auto rootObj = doc.object();
auto _d = rootObj.value("_d").toArray();
auto _t = _d[0].toObject().value("_t").toArray();
auto _quote = _t[0].toObject().value(QString("_quote"));
qDebug() << _quote;

to get value from specified line: obj._d[0]._t[0]._quote of html and it gives
QJsonValue(string, "2248.18")
Now i would like to have output: Bid value is: 2248.18
Do you know what i should do?

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