How to retrieve HTTPS json data using QNetworkRequest - c++

Question

I have some code that successfully retrieves json content from an HTTP source:
void MainWindow::Test()
{
QNetworkRequest request;
QString filename = "http://ip.jsontest.com";
//QString filename = "https://api.github.com/users/mralexgray/repos";
request.setHeader(QNetworkRequest::ContentTypeHeader, "application/json");
request.setSslConfiguration(QSslConfiguration::defaultConfiguration());
request.setUrl(QUrl(filename));
QJsonObject json;
QNetworkAccessManager nam;
QNetworkReply *reply = nam.post(request, QJsonDocument(json).toJson());
while(!reply->isFinished())
{
qApp->processEvents();
}
if (reply->error() == QNetworkReply::NoError)
{
QByteArray response_data = reply->readAll();
QJsonDocument document = QJsonDocument::fromJson(response_data);
QJsonObject object = document.object();
qDebug() << "Json File Loaded : " << filename;
qDebug() << "IP: " << object["ip"].toString();
}
else // something went wrong
{
qDebug() << "Json File Failed to Load : " << filename;
qDebug() << "Error : " << reply->errorString();
}
reply->deleteLater();
}
However, when I change the URL to the HTTPS one (the line commented out in the code) I get the error "server replied: Not Found"
The HTTPS url works fine in a browser.
In my search for answers I found many different suggestions but no actual working solution.
I believe the problem is down to QT not supporting SSL 'out of the box' due to licensing issues, but here's what I've attempted so far.
I installed "Win32OpenSSL-1_0_2h.exe"
I then copied "libeay32.dll" and "ssleay32.dll" into the QT debug folder.
I added the following to the project "pro" file:
LIBS += -LC:/OpenSSL-Win32/lib -lubsec
INCLUDEPATH += C:/OpenSSL-Win32/include
I tried with and without the setSslConfiguration call.
But all this hasn't helped.
I tested SSL with the QT method:
if (QSslSocket::supportsSsl())
{
qDebug() << "Supports SSL";
}
else
{
qDebug() << "Does NOT Support SSL";
}
and that is saying "supported".
I am building the project in QT Creator, using MSVC2012 32bit settings.