Receiving JSON from GET request in google apis

[Au7h]

Hello,

ive a problem with receiving JSON from request.

Headers:
jsontest.h

Sources:
main.cpp
jsontest.cpp

main.cpp below

#include <QCoreApplication>
#include "jsontest.h"

int main(int argc, char *argv[])
{
    QCoreApplication a(argc, argv);

    JsonTest json;
    json.DoSomething();
    return a.exec();
}

jsontest.h below

#ifndef JSONTEST_H
#define JSONTEST_H

#include <QObject>
#include <QtNetwork>
#include <QtCore>

class JsonTest : public QObject
{
    Q_OBJECT
public:
    explicit JsonTest(QObject *parent = nullptr);
    void DoSomething();
signals:

public slots:
    void onResult(QNetworkReply *);
};

#endif // JSONTEST_H

jsontest.cpp below

#include "jsontest.h"

JsonTest::JsonTest(QObject *parent) : QObject(parent)
{
}

void JsonTest::DoSomething()
{
    QNetworkAccessManager networkManager;
    connect(&networkManager, SIGNAL(finished(QNetworkReply*)), this, SLOT(onResult(QNetworkReply*)));
    QUrl url("https://www.googleapis.com/customsearch/v1?key=myapihere&cx=017576662512468239146:omuauf_lfve&q=lectures");
    QNetworkRequest request;
    request.setUrl(url);

    QNetworkReply* currentReply = networkManager.get(request);  // GET
    qDebug() << currentReply->readAll();
    currentReply->deleteLater();
}

void JsonTest::onResult(QNetworkReply *reply)
{
    qDebug() << "lol";
}

when i copy and paste url in web browser: https://www.googleapis.com/customsearch/v1?key=myapihere&cx=017576662512468239146:omuauf_lfve&q=lectures i will see results but in app the slot does not even execute

[mrjj]

Hi and welcome to the forums .
Its a classic.
void JsonTest::DoSomething()
{
QNetworkAccessManager networkManager; <<< local variable. it will be deleted before getting any reply.

put it as a member of JsonTest class so it stays alive.

[Au7h]

This post is deleted!

[Au7h]

still the same

[Au7h]

ok i commented line currentReply->deleteLater(); and it works :D

[SGaist]

Hi,

You are trying to read the reply too early as well as deleting it too early. You should do both in the slot connected to the finished signal.