QWebFrame::findAllElements() doesn't work in separate thread

[master94]

hi. i'm trying to parse webPage to get all links on it. i use a QThreadPool and my own class implementing QRunnable, which provides all fucntionality. Everything is going good, if I run such QRunnable in main thread, but
when I put my Runnable to the thread pool, QWebFrame::findAllElements("a") returns empty set. =(

I run my Runnable:
in same thread, findAllElements() works perfect
@webLoader()->run();@

findAllElements() returns empty set =(
@threadPool->start(webLoader);@

I've already spent many hours trying to figure out problem. =(

Here is my code snippets:

webloader.h
@class WebLoader : public QObject, public QRunnable
{
Q_OBJECT
QUrl url;
QString textPattern;
QWebPage* page;
public:
explicit WebLoader(const QUrl& url, const QString& textPattern);
void run();
virtual ~WebLoader();
signals:
void loaded(QList<QUrl> urls, bool error, bool found);
private slots:
void loadFinished(bool success);
};@

webloader.cpp
@WebLoader::WebLoader(const QUrl& url, const QString& textPattern): url(url), textPattern(textPattern) {
setAutoDelete(false);
}

void WebLoader::run() {
QEventLoop loop;

page = new QWebPage;
page->mainFrame()->load(url);

connect(page->mainFrame(), SIGNAL(loadFinished(bool)), SLOT(loadFinished(bool)));
connect(page->mainFrame(), SIGNAL(loadFinished(bool)), &loop, SLOT(quit()));

loop.exec();

}

void WebLoader::loadFinished(bool success) {
QList<QUrl> urlList;
bool found = false;

if(success) {
    QWebElementCollection collection = page->mainFrame()->findAllElements("a");

    foreach(QWebElement element, collection) {
        if(element.hasAttribute("href")) {
            urlList.push_back(url.resolved(QUrl(element.attribute("href"))));
        }
    }

    found = page->findText(textPattern);
}

emit loaded(urlList, !success, found);

}@

PS. sorry for my english.

[ThatDude]

That is not possible with current Webkit 2, alas Webkit 3 is QML only and is missing a ton of useful features

Webkit 2 creates and uses QWidgets so all access to Qt webkit should be done on main thread. This is by design.
What you want should be possible with Webkit 3 alas we are still waiting for a decent C++ API
http://qt-project.org/forums/viewthread/26585

[master94]

Thanks a lot for your answer. It's sadly, webkit could be a great tool for html-parsing.
Finally, I've used regexps to cut out "<a ></a>" fragments from html-code.