How to save dynamically generated web page in QWebEngineView?

Question

I am loading a web page onto QWebEngineView . A user creates a different kind of tables (reports) and then needs to save those tables to local computer as a web page. Here is what I have tried:

1. Here I use a QWebEnginePage::save() method, but nothing happens:

    connect(saveButton, &QPushButton::clicked, this, [this]() { engineWebView->page()->save("save.html"); }); 

2. Then I tried a QWebEngineProfile::download() method:

    connect(saveButton, &QPushButton::clicked, this, [this]()
    {
        engineWebView->page()->download(engineWebView->page()->url(), "save");
    });
    connect(engineWebView->page()->profile(), &QWebEngineProfile::downloadRequested, this, [this](QWebEngineDownloadItem *download) 
    {
        download->setPath("save.html");
        download->accept();
    });

In the second solution, I can save only the first loaded webpage. No dynamically created content.

How do I save a dynamically created data?

---

Edit : minimal reproducible code:

 #include <QApplication> #include <QDebug> #include <QFile> #include <QHBoxLayout> #include <QPushButton> #include <QWebEngineProfile> #include <QWebEngineView> int main(int argc, char *argv[]) { QApplication app(argc, argv); QWebEngineView *engine = new QWebEngineView; QObject::connect(engine->page()->profile(), &QWebEngineProfile::downloadRequested, [](QWebEngineDownloadItem *download) { download->setPath("download.html"); download->accept(); }); QPushButton *saveButton = new QPushButton("Save"); QObject::connect(saveButton, &QPushButton::clicked, [engine]() { engine->page()->save("save.html"); }); QPushButton *toHtmlButton = new QPushButton("ToHtml"); QObject::connect(toHtmlButton, &QPushButton::clicked, [engine]() { engine->page()->toHtml([](QString html){ QFile file("toHtml.html"); if (file.open(QFile::WriteOnly | QFile::Text)) { QTextStream stream(&file); stream << html; file.waitForBytesWritten(-1); file.close(); } else qDebug() << "Cannot create a file"; }); }); QPushButton *downloadButton = new QPushButton("Download"); QObject::connect(downloadButton, &QPushButton::clicked, [engine]() { engine->page()->download(engine->page()->url()); }); QHBoxLayout *hLyt = new QHBoxLayout; hLyt->addWidget(saveButton); hLyt->addWidget(toHtmlButton); hLyt->addWidget(downloadButton); QVBoxLayout *vLyt = new QVBoxLayout; vLyt->addLayout(hLyt); vLyt->addWidget(engine); QWidget *mainWin = new QWidget; mainWin->setLayout(vLyt); mainWin->show(); // The url is an example for react usage. I am generating data using ReactJS that's why I use this example. What I need is to store the exact view of the dynamically generated calculator engine->load(QUrl("https://ahfarmer.github.io/calculator/")); return app.exec(); } 

Answer 1

If you want to get the dynamically generated html you can use javascript to get the outerHTML of the document using the runJavaScript() method of QWebEnginePage :

#include <QtWebEngineWidgets>

int main(int argc, char *argv[])
{
    QApplication app(argc, argv);
    QWebEngineView *view = new QWebEngineView;
    QPushButton *button = new QPushButton("Press me");
    button->setEnabled(false);
    QObject::connect(button, &QPushButton::clicked, [view]()
    {
        view->page()->runJavaScript("document.documentElement.outerHTML", [](const QVariant &v) { 
            QFile file("outerHTML.html");
            if(!file.open(QFile::WriteOnly | QFile::Text)){
                qDebug() << "Cannot create a file";
                return;
            }
            QTextStream stream(&file);
            stream << v.toString();
            file.close();
        });
    });
    QObject::connect(view, &QWebEngineView::loadFinished, [button](bool ok){
        button->setEnabled(ok);
    });
    view->load(QUrl("https://ahfarmer.github.io/calculator/"));
    QWidget w;
    QVBoxLayout *lay = new QVBoxLayout(&w);
    lay->addWidget(button);
    lay->addWidget(view);
    w.resize(640, 480);
    w.show();
    return app.exec();
}