Qt, how to know the request from which page with CustomScheme - c++

Question

I's using the QWebEngineView to render a h5 page, the h5 page use our custom scheme protocol to communicate with native.
For example, when the native receive the 'scheme_name://close' message from h5 page, the native will close the h5 page.
How can i know the message from which page?
Firstly, i use QDesktopServices::setUrlHandler() to set a url handler, but it's a global handler, and the callback must accepts a single QUrl argument, i can not know the page which the request from.
class Dialog : public QDialog {
public:
void Close() {
web_view_->close();
close();
}
private:
QWebEngineView *web_view_;
}
void OnCustomScheme(const QUrl &url) {
if (url.scheme() != "scheme_name") {
return;
}
if (url.host() == "close") {
// call Dialog::Close();
// who->Close();
}
}
Secondly,i try to use QWebEngineProfile::installUrlSchemeHandler, the receive can use a member of my page, like:
class SchemeHandler : public QWebEngineUrlSchemeHandler {
public:
void requestStarted(QWebEngineUrlRequestJob *job) override {
emit SignalSchemeRequest(job->requestUrl());
}
signals:
void SignalSchemeRequest(const QUrl &url);
};
class Dialog : public QDialog {
public:
Dialog() {
handler_ = new SchemeHandler(this);
connect(handler_, &SchemeHandler::SignalSchemeRequest,
this, &Dialog::SlotSchemeRequest);
profile_ = new QWebEngineProfile(this);
profile_->installUrlSchemeHandler("scheme_name", handler_);
}
void LoadPage(const QUrl &url) {
QWebEnginePage *page = new QWebEnginePage(profile_, this);
web_view_->setPage(page);
page->load(url);
}
void Close() {
web_view_->close();
close();
}
private slots:
coid SlotSchemeRequest(const QUrl &url) {
if (url.host() == "close") {
Close();
}
}
private:
QWebEngineView *web_view_;
SchemeHandler *handler_;
QWebEngineProfile *profile_;
}
Does it has any better way to do?
Everytime to load a page, i have to new a QWebEnginePage.