Cannot get data from HTTP request

[SGaist]

The name of the class containing the signal, same goes for the last parameter, it's the name of the class containing the slot.

[t0msk]

@SGaist

Changed it to this:

connect(
        reply, &QNetworkReply::finished,
        this, &Manager::replyFinished
    );

And I get:

/usr/include/qt/QtCore/qobject.h:243: error: static assertion failed: The slot requires more arguments than the signal provides.
  243 |         Q_STATIC_ASSERT_X(int(SignalType::ArgumentCount) >= int(SlotType::ArgumentCount),
      |         ^~~~~~~~~~~~~~~~~

[mrjj]

@t0msk said in Cannot get data from HTTP request:

QNetworkReply::finished,

Well you are mixing the classes/signals.
The reply's signals is
https://doc.qt.io/qt-5/qnetworkreply.html#finished
and have no QNetworkReply* parameter.

so i think you mean

connect(
        Manager, &QNetworkAccessManager::finished,
        this, &Manager::replyFinished
    );

[t0msk]

@mrjj said in Cannot get data from HTTP request:

@t0msk said in Cannot get data from HTTP request:

QNetworkReply::finished,

Well you are mixing the classes.
The reply signals is
https://doc.qt.io/qt-5/qnetworkreply.html#finished
and have no QNetworkReply* parameter.

so i think you mean

connect(
        Manager, &QNetworkAccessManager::finished,
        this, &Manager::replyFinished
    );

Thank you,
so now I have:

    QSslConfiguration config = QSslConfiguration::defaultConfiguration();
    config.setProtocol(QSsl::TlsV1_2);
    QNetworkAccessManager *manager = new QNetworkAccessManager();
    QNetworkRequest request;


    request.setHeader(QNetworkRequest::ServerHeader, "application/json");
    request.setSslConfiguration(config);
    request.setUrl(QUrl("https://www.archlinux.org/packages/search/json/?q=dolphin"));

    QNetworkReply *reply = manager->get(request);

    connect(
        manager, &QNetworkAccessManager::finished,
        this, &Manager::replyFinished
    );

    connect(
        manager, &QNetworkAccessManager::sslErrors,
        this, &Manager::replyFinished
    );

void Manager::replyFinished(QNetworkReply *reply)
{
    qDebug() << reply->readAll();

    QString ha = reply->readAll();

    QString he;
}

Still no output and no error :/

[mrjj]

Hi
Its a bit odd to connect all to the same slot but lets leave it for now.

now its time to
check your openSSL support !

what does
qDebug() << "i can use HTTPS:" << QSslSocket::supportsSsl();
qDebug() << "version" << QSslSocket::sslLibraryBuildVersionString();

say ?

[t0msk]

@mrjj
It says:

i can use HTTPS: true
version "OpenSSL 1.1.1c  28 May 2019"

[SGaist]

What version of Qt are you using ?

One more thing: do these connections prior to calling get.

[t0msk]

@SGaist Qt version is 5.13.1

[t0msk]

So where can be problem? :/

[SGaist]

Did you move the connection statements as I suggested ?

[t0msk]

@SGaist I dont know what do you mean

[JonB]

@t0msk

@SGaist wrote

Did you move the connection statements as I suggested ?

In your code you show:

    QNetworkReply *reply = manager->get(request);

    connect(
        manager, &QNetworkAccessManager::finished,
        this, &Manager::replyFinished
    );

    connect(
        manager, &QNetworkAccessManager::sslErrors,
        this, &Manager::replyFinished
    );

You are calling the manager->get(request) before you have connected the signals/slots on manager, which may/will be too late. He is asking you to change over anything like that to

    connect(
        manager, &QNetworkAccessManager::finished,
        this, &Manager::replyFinished
    );

    connect(
        manager, &QNetworkAccessManager::sslErrors,
        this, &Manager::replyFinished
    );

    QNetworkReply *reply = manager->get(request);

so you move the connection statements to before the get(request). So we get to see finished or quite possibly errors from the request. In general, you need to set up signals/slots as soon as you create an object (manager here), before you call anything which could raise a signal.

[t0msk]

Changed it like:

    connect(
        manager, &QNetworkAccessManager::finished,
        this, &Manager::replyFinished
    );

    connect(
        manager, &QNetworkAccessManager::sslErrors,
        this, &Manager::replyFinished
    );

    QNetworkReply *reply = manager->get(request);

and still doesn't work, no error, no reply.