How do I read the data from QNetworkReply? - c++

Question

How do I read the data from a QNetworkReply response from a specific URL before QWebPage does? but when the finished() signal is emited the reply is read already by QWebPage, so connect readyRead() or call reply->readAll() return nothing. I tried overload acceptNavigationRequest() method in my own QWebPage class, something like this:
bool webPage::acceptNavigationRequest(QWebFrame *frame, const QNetworkRequest &request, QWebPage::NavigationType type)
{
//qDebug() << "filename = " << request.rawHeader("content-disposition");
if(request.url().path() == QStringLiteral("download.php"))
{
QNetworkReply *reply = networkAccessManager()->get(request);
QFile file;
file.setFileName(filename);
if(!file.open(QIODevice::ReadWrite))
{
/* handle error */
}
file.write(reply->readAll());
file.close();
return false;
}
But I couldn't manage to reply work... the returned reply is invalid (don't even return a http status code, I know it means the http request sent is invalid but i don't know why).
Different approachs to solve this are welcome!

Answer 1

Using the finished slot with a lambda expression, you can do this: -
QNetworkReply* reply = networkAccessManager()->get(request);
connect(reply, &QNetworkReply::finished, [=]() {
if(reply->error() == QNetworkReply::NoError)
{
QByteArray response = reply->readAll();
// do something with the data...
}
else // handle error
{
qDebug(pReply->errorString());
}
});