toHtml of QWebEnginePage always return empty string

tham

os : win 10 64bits
compiler : visual c++ 205
Qt version : Qt5.8, Qt5.9 beta 3

I search the solution on stackOverflow but none of them work.

experiment_widget.cpp

#include "experiment_widget.hpp"
#include "ui_experiment_widget.h"

#include <QDebug>
#include <QRegularExpression>
#include <QRegularExpressionMatch>
#include <QWebEnginePage>
#include <QWebEngineView>

experiment_widget::experiment_widget(QWidget *parent) :
    QMainWindow(parent),
    ui(new Ui::experiment_widget),
    web_page_(nullptr),
    web_view_(new QWebEngineView(this))
{
    ui->setupUi(this);    

    ui->gridLayout->addWidget(web_view_, 3, 0, 1, 2);
    connect(web_view_, &QWebEngineView::loadFinished, this, &experiment_widget::web_view_load_finished);    

    web_page_ = web_view_->page();
    connect(web_page_, &QWebEnginePage::loadFinished, this, &experiment_widget::web_page_load_finished);

    //load by webpage do not work either
    //web_page_->load(QUrl("https://www.bing.com/images/search?q=smoke"));
    web_view_->load(QUrl("https://www.bing.com/images/search?q=smoke"));
}

experiment_widget::~experiment_widget()
{
    delete ui;
}

void experiment_widget::web_page_load_finished(bool ok)
{
    qDebug()<<"web page load finished:"<<ok;
    parse_image_link();
}

void experiment_widget::web_view_load_finished(bool ok)
{
    qDebug()<<"web view load finished:"<<ok;    
    parse_image_link();
}

void experiment_widget::parse_image_link()
{
    web_page_->toHtml([this](QString const &contents)
    {
        qDebug()<<"get image link contents";
        qDebug()<<contents; //always empty        
    });
}

toPlainText work, but what I want is the source codes of the page.

Whole project is place at mega.

tham

I give it a try under ubuntu16.04.1, it works. I guess this is a bug of Qt and open an issue

tham

Open bug report, ticket is 60669

JonB

@tham
This is a bit of a necro, but for anyone coming across this I believe this is not a bug but is addressed by understanding & following https://stackoverflow.com/questions/45363190/get-html-from-qwebenginepage-in-qwebengineview-using-lamda