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qtqt5chromiumqtwebengine

How to determine which chromium version is used by QtWebEngine in Qt 5 at run-time?

I couldn't find any function in Qt 5 to determine which chromium version is used by QtWebEngine.

I don't want to hard-code the chromium version in my code because I frequently update my application and the chromium version is usually changed in each version. And also Qt is backward-compatible and it is possible to update it without updating my application.

Solution

  • There is no direct solution but looking at the source code You can see that it is used to set the default user agent:

    std::string ContentBrowserClientQt::getUserAgent()
{
    // Mention the Chromium version we're based on to get passed stupid UA-string-based feature detection (several WebRTC demos need this)
    return content::BuildUserAgentFromProduct("QtWebEngine/" QTWEBENGINECORE_VERSION_STR " Chrome/" CHROMIUM_VERSION);
}

    So it can be extracted from that data:

    QString version;
QString user_agent = QWebEngineProfile::defaultProfile()->httpUserAgent();
for(const QString & text : user_agent.split(" ")){
    if(text.startsWith(QStringLiteral("Chrome/"))){
        version = text.mid(QStringLiteral("Chrome/").length());
    }
}
qDebug().noquote()<< "Qt version:" << QT_VERSION_STR << "chromium version:" << version;

    Output:

    Qt version: 5.14.2 chromium version: 77.0.3865.129