QWebEngineView request body interception - c++

Question

A user using QWebEngineView in my application fills some form. This form uses post method to submit data to server. How can I get params from user's body request?
I've found such thing as QWebEngineUrlRequestInterceptor, but it works only for urls.

Answer 1

You can use QWebEnginePage::acceptNavigationRequest.
Whenever a form is submitted, you can get the contents of input by using JavaScript and then accept the request to proceed as usual.

Answer 2

Like Anmol Gautam said, you need to reimplement QWebEnginePage::acceptNavigationRequest function and get needed data using JavaScript.
Here is an example how to do it:
mywebpage.h
#include <QWebEnginePage>
class MyWebPage : public QWebEnginePage
{
Q_OBJECT
public:
explicit MyWebPage(QWebEngineProfile *profile = Q_NULLPTR, QObject *parent = Q_NULLPTR);
protected:
bool acceptNavigationRequest(const QUrl & url, QWebEnginePage::NavigationType type, bool isMainFrame);
}
mywebpage.cpp
MyWebPage::MyWebPage(QWebEngineProfile *profile, QObject *parent):QWebEnginePage(profile, parent),
{
//...
}
bool MyWebPage::acceptNavigationRequest(const QUrl & url, QWebEnginePage::NavigationType type, bool isMainFrame)
{
if(type == QWebEnginePage::NavigationTypeFormSubmitted)
{
qDebug() << "[FORMS] Submitted" << url.toString();
QString jsform = "function getformsvals()"
"{var result;"
"for(var i = 0; i < document.forms.length; i++){"
"for(var x = 0; x < document.forms[i].length; x++){"
"result += document.forms[i].elements[x].name + \" = \" +document.forms[i].elements[x].value;"
"}}"
"return result;} getformsvals();";
this->runJavaScript(jsform, [](const QVariant &result){ qDebug() << "[FORMS] found: " << result; });
}
return true;
}
use QWebEngineView::setPage to set your WebPage subclass to WebView before you call WebViews load function.
Here is a link for more info about HTML DOM forms Collection