Add QtWebView::WebView::httpUserAgent property

The httpUserAgent property allows to get and set the User Agent.

Task-number: QTBUG-68746
Change-Id: I12fb5da00b14ecba53e71c532f2c8401f8f2a009
Reviewed-by: Oliver Wolff <oliver.wolff@qt.io>
Reviewed-by: Christian Strømme <christian.stromme@qt.io>

19 files changed, 194 insertions, 2 deletions

diff --git a/src/imports/plugins.qmltypes b/src/imports/plugins.qmltypes
index 3a143fd..c07bfe2 100644
--- a/src/imports/plugins.qmltypes
+++ b/src/imports/plugins.qmltypes
@@ -22,7 +22,7 @@ Module {
         name: "QQuickWebView"
         defaultProperty: "data"
         prototype: "QQuickViewController"
-        exports: ["QtWebView/WebView 1.0", "QtWebView/WebView 1.1"]
+        exports: ["QtWebView/WebView 1.0", "QtWebView/WebView 1.1", "QtWebView/WebView 1.14"]
         exportMetaObjectRevisions: [0, 1]
         Enum {
             name: "LoadStatus"
@@ -33,6 +33,7 @@ Module {
                 "LoadFailedStatus": 3
             }
         }
+        Property { name: "httpUserAgent"; revision: 14; type: "QString" }
         Property { name: "url"; type: "QUrl" }
         Property { name: "loading"; revision: 1; type: "bool"; isReadonly: true }
         Property { name: "loadProgress"; type: "int"; isReadonly: true }
diff --git a/src/imports/webview.cpp b/src/imports/webview.cpp
index d73ce09..c221655 100644
--- a/src/imports/webview.cpp
+++ b/src/imports/webview.cpp
@@ -56,6 +56,7 @@ public:
         const QString &msg = QObject::tr("Cannot create separate instance of WebViewLoadRequest");
         qmlRegisterType<QQuickWebView>(uri, 1, 0, "WebView");
         qmlRegisterType<QQuickWebView, 1>(uri, 1, 1, "WebView");
+        qmlRegisterType<QQuickWebView, 14>(uri, 1, 14, "WebView");
         qmlRegisterUncreatableType<QQuickWebViewLoadRequest>(uri, 1, 1, "WebViewLoadRequest", msg);
 
         // Make sure we're always available under version x.QT_VERSION_MINOR
diff --git a/src/jar/src/org/qtproject/qt5/android/view/QtAndroidWebViewController.java b/src/jar/src/org/qtproject/qt5/android/view/QtAndroidWebViewController.java
index 0f4b424..a4feca5 100644
--- a/src/jar/src/org/qtproject/qt5/android/view/QtAndroidWebViewController.java
+++ b/src/jar/src/org/qtproject/qt5/android/view/QtAndroidWebViewController.java
@@ -250,6 +250,20 @@ public class QtAndroidWebViewController
         }
     }
 
+    public void setUserAgent(final String userAgent)
+    {
+        if (userAgent == null){
+            return;
+        }
+
+        resetLoadingState(STARTED_STATE);
+        c_onPageStarted(m_id, null, null);
+        m_activity.runOnUiThread(new Runnable() {
+            @Override
+            public void run() { m_webView.getSettings().setUserAgentString(userAgent); }
+        });
+    }
+
     public void loadUrl(final String url)
     {
         if (url == null) {
diff --git a/src/plugins/android/qandroidwebview.cpp b/src/plugins/android/qandroidwebview.cpp
index 94e123c..3d2b98d 100644
--- a/src/plugins/android/qandroidwebview.cpp
+++ b/src/plugins/android/qandroidwebview.cpp
@@ -103,6 +103,19 @@ QAndroidWebViewPrivate::~QAndroidWebViewPrivate()
     m_viewController.callMethod<void>("destroy");
 }
 
+QString QAndroidWebViewPrivate::httpUserAgent() const
+{
+    return QString( m_viewController.callObjectMethod<jstring>("getUserAgent").toString());
+}
+
+void QAndroidWebViewPrivate::setHttpUserAgent(const QString &userAgent)
+{
+    m_viewController.callMethod<void>("setUserAgent",
+                                      "(Ljava/lang/String;)V",
+                                      QJNIObjectPrivate::fromString(userAgent).object());
+    Q_EMIT httpUserAgentChanged(userAgent);
+}
+
 QUrl QAndroidWebViewPrivate::url() const
 {
     return QUrl::fromUserInput(m_viewController.callObjectMethod<jstring>("getUrl").toString());
diff --git a/src/plugins/android/qandroidwebview_p.h b/src/plugins/android/qandroidwebview_p.h
index 9c1d364..1498a98 100644
--- a/src/plugins/android/qandroidwebview_p.h
+++ b/src/plugins/android/qandroidwebview_p.h
@@ -64,6 +64,8 @@ public:
     explicit QAndroidWebViewPrivate(QObject *p = 0);
     ~QAndroidWebViewPrivate() Q_DECL_OVERRIDE;
 
+    QString httpUserAgent() const Q_DECL_OVERRIDE;
+    void setHttpUserAgent(const QString &httpUserAgent) Q_DECL_OVERRIDE;
     QUrl url() const Q_DECL_OVERRIDE;
     void setUrl(const QUrl &url) Q_DECL_OVERRIDE;
     bool canGoBack() const Q_DECL_OVERRIDE;
diff --git a/src/plugins/darwin/qdarwinwebview.mm b/src/plugins/darwin/qdarwinwebview.mm
index ba99ac6..a9c711c 100644
--- a/src/plugins/darwin/qdarwinwebview.mm
+++ b/src/plugins/darwin/qdarwinwebview.mm
@@ -467,4 +467,17 @@ void QDarwinWebViewPrivate::runJavaScriptPrivate(const QString &script, int call
     }];
 }
 
+QString QDarwinWebViewPrivate::httpUserAgent() const
+{
+    return QString::fromNSString(wkWebView.customUserAgent);
+}
+
+void QDarwinWebViewPrivate::setHttpUserAgent(const QString &userAgent)
+{
+    if (!userAgent.isEmpty()) {
+        wkWebView.customUserAgent = userAgent.toNSString();
+    }
+    Q_EMIT httpUserAgentChanged(userAgent);
+}
+
 QT_END_NAMESPACE
diff --git a/src/plugins/darwin/qdarwinwebview_p.h b/src/plugins/darwin/qdarwinwebview_p.h
index 96fb09e..c69ee55 100644
--- a/src/plugins/darwin/qdarwinwebview_p.h
+++ b/src/plugins/darwin/qdarwinwebview_p.h
@@ -82,6 +82,8 @@ public:
     explicit QDarwinWebViewPrivate(QObject *p = 0);
     ~QDarwinWebViewPrivate() Q_DECL_OVERRIDE;
 
+    QString httpUserAgent() const Q_DECL_OVERRIDE;
+    void setHttpUserAgent(const QString &httpUserAgent) Q_DECL_OVERRIDE;
     QUrl url() const Q_DECL_OVERRIDE;
     void setUrl(const QUrl &url) Q_DECL_OVERRIDE;
     bool canGoBack() const Q_DECL_OVERRIDE;
diff --git a/src/plugins/webengine/qwebenginewebview.cpp b/src/plugins/webengine/qwebenginewebview.cpp
index d083b8d..f16371d 100644
--- a/src/plugins/webengine/qwebenginewebview.cpp
+++ b/src/plugins/webengine/qwebenginewebview.cpp
@@ -65,7 +65,7 @@ static QByteArray qmlSource()
 }
 
 QWebEngineWebViewPrivate::QWebEngineWebViewPrivate(QObject *p)
-    : QAbstractWebView(p)
+    : QAbstractWebView(p), m_profile(nullptr)
 {
     m_webEngineView.m_parent = this;
 }
@@ -74,6 +74,17 @@ QWebEngineWebViewPrivate::~QWebEngineWebViewPrivate()
 {
 }
 
+QString QWebEngineWebViewPrivate::httpUserAgent() const
+{
+    return m_httpUserAgent;
+}
+
+void QWebEngineWebViewPrivate::setHttpUserAgent(const QString &userAgent)
+{
+    m_profile->setHttpUserAgent(userAgent);
+    Q_EMIT httpUserAgentChanged(userAgent);
+}
+
 QUrl QWebEngineWebViewPrivate::url() const
 {
     return m_webEngineView->url();
@@ -195,6 +206,30 @@ void QWebEngineWebViewPrivate::q_loadingChanged(QQuickWebEngineLoadRequest *load
     Q_EMIT loadingChanged(lr);
 }
 
+void QWebEngineWebViewPrivate::q_profileChanged()
+{
+    auto profile = m_webEngineView->profile();
+    if (profile == m_profile)
+        return;
+
+    m_profile = profile;
+    auto userAgent = m_profile->httpUserAgent();
+    if (m_httpUserAgent == userAgent)
+        return;
+    m_httpUserAgent = userAgent;
+    QObject::connect(m_profile, &QQuickWebEngineProfile::httpUserAgentChanged, this, &QWebEngineWebViewPrivate::q_httpUserAgentChanged);
+    Q_EMIT httpUserAgentChanged(userAgent);
+}
+
+void QWebEngineWebViewPrivate::q_httpUserAgentChanged()
+{
+    QString httpUserAgent = m_profile->httpUserAgent();
+    if (m_httpUserAgent == httpUserAgent)
+        return;
+     m_httpUserAgent = httpUserAgent;
+     Q_EMIT httpUserAgentChanged(m_httpUserAgent);
+}
+
 void QWebEngineWebViewPrivate::QQuickWebEngineViewPtr::init() const
 {
     Q_ASSERT(!m_webEngineView);
@@ -218,10 +253,15 @@ void QWebEngineWebViewPrivate::QQuickWebEngineViewPtr::init() const
     component->setData(qmlSource(), QUrl::fromLocalFile(QLatin1String("")));
     QQuickWebEngineView *webEngineView = qobject_cast<QQuickWebEngineView *>(component->create());
     Q_ASSERT(webEngineView);
+    QQuickWebEngineProfile *profile = webEngineView->profile();
+    m_parent->m_profile = profile;
+    m_parent->m_httpUserAgent = profile->httpUserAgent();
     QObject::connect(webEngineView, &QQuickWebEngineView::urlChanged, m_parent, &QWebEngineWebViewPrivate::q_urlChanged);
     QObject::connect(webEngineView, &QQuickWebEngineView::loadProgressChanged, m_parent, &QWebEngineWebViewPrivate::q_loadProgressChanged);
     QObject::connect(webEngineView, &QQuickWebEngineView::loadingChanged, m_parent, &QWebEngineWebViewPrivate::q_loadingChanged);
     QObject::connect(webEngineView, &QQuickWebEngineView::titleChanged, m_parent, &QWebEngineWebViewPrivate::q_titleChanged);
+    QObject::connect(webEngineView, &QQuickWebEngineView::profileChanged,m_parent, &QWebEngineWebViewPrivate::q_profileChanged);
+    QObject::connect(profile, &QQuickWebEngineProfile::httpUserAgentChanged, m_parent, &QWebEngineWebViewPrivate::q_httpUserAgentChanged);
     webEngineView->setParentItem(parentItem);
     m_webEngineView.reset(webEngineView);
 }
diff --git a/src/plugins/webengine/qwebenginewebview_p.h b/src/plugins/webengine/qwebenginewebview_p.h
index 88d6284..995f2f0 100644
--- a/src/plugins/webengine/qwebenginewebview_p.h
+++ b/src/plugins/webengine/qwebenginewebview_p.h
@@ -55,6 +55,8 @@
 #include <QtQml/qqmlcomponent.h>
 
 #include <private/qabstractwebview_p.h>
+#include <QtWebEngine/QQuickWebEngineProfile>
+
 
 QT_BEGIN_NAMESPACE
 
@@ -68,6 +70,8 @@ public:
     explicit QWebEngineWebViewPrivate(QObject *p = 0);
     ~QWebEngineWebViewPrivate() Q_DECL_OVERRIDE;
 
+    QString httpUserAgent() const Q_DECL_OVERRIDE;
+    void setHttpUserAgent(const QString &userAgent) Q_DECL_OVERRIDE;
     QUrl url() const Q_DECL_OVERRIDE;
     void setUrl(const QUrl &url) Q_DECL_OVERRIDE;
     bool canGoBack() const Q_DECL_OVERRIDE;
@@ -95,12 +99,16 @@ private Q_SLOTS:
     void q_loadProgressChanged();
     void q_titleChanged();
     void q_loadingChanged(QQuickWebEngineLoadRequest *loadRequest);
+    void q_profileChanged();
+    void q_httpUserAgentChanged();
 
 protected:
     void runJavaScriptPrivate(const QString& script,
                               int callbackId) Q_DECL_OVERRIDE;
 
 private:
+    QQuickWebEngineProfile *m_profile;
+    QString m_httpUserAgent;
     struct QQuickWebEngineViewPtr
     {
         inline QQuickWebEngineView *operator->() const
diff --git a/src/plugins/winrt/qwinrtwebview.cpp b/src/plugins/winrt/qwinrtwebview.cpp
index 0faf7d1..8deabdc 100644
--- a/src/plugins/winrt/qwinrtwebview.cpp
+++ b/src/plugins/winrt/qwinrtwebview.cpp
@@ -54,6 +54,8 @@
 #include <windows.ui.xaml.controls.h>
 #include <windows.ui.xaml.markup.h>
 #include <windows.web.h>
+#include <urlmon.h>
+#include <WinInet.h>
 
 using namespace Microsoft::WRL;
 using namespace Microsoft::WRL::Wrappers;
@@ -373,6 +375,36 @@ QWinRTWebViewPrivate::~QWinRTWebViewPrivate()
     });
 }
 
+QString QWinRTWebViewPrivate::httpUserAgent() const
+{
+#ifdef QT_WINRT_URLMKGETSESSIONOPTION_NOT_AVAILABLE
+    qWarning() << "Used Windows SDK version (" << QString::number(QT_UCRTVERSION) << ") does not "
+                  "support getting or setting of the user agent property from within UWP applications. Consider updating to a more recent Windows 10 "
+                  "SDK (16299 or above).";
+    return "";
+#else
+    char buffer[255];
+    unsigned long stringLength;
+    HRESULT hr = UrlMkGetSessionOption(0x10000001,&buffer,255,&stringLength,0);
+    Q_ASSERT_SUCCEEDED(hr);
+    return QString(buffer);
+#endif
+}
+
+void QWinRTWebViewPrivate::setHttpUserAgent(const QString &userAgent)
+{
+#ifdef QT_WINRT_URLMKSETSESSIONOPTION_NOT_AVAILABLE
+    Q_UNUSED(userAgent);
+    qWarning() << "Used Windows SDK version (" << QString::number(QT_UCRTVERSION) << ") does not "
+                  "support getting or setting of the user agent property from within UWP applications. Consider updating to a more recent Windows 10 "
+                  "SDK (16299 or above).";
+#else
+    HRESULT hr = UrlMkSetSessionOption(0x10000001,userAgent.toLocal8Bit().data(),userAgent.size(),0);
+    Q_ASSERT_SUCCEEDED(hr);
+    emit httpUserAgentChanged(userAgent);
+#endif
+}
+
 QUrl QWinRTWebViewPrivate::url() const
 {
     ComPtr<IUriRuntimeClass> uri;
diff --git a/src/plugins/winrt/qwinrtwebview_p.h b/src/plugins/winrt/qwinrtwebview_p.h
index 3756b7d..0030824 100644
--- a/src/plugins/winrt/qwinrtwebview_p.h
+++ b/src/plugins/winrt/qwinrtwebview_p.h
@@ -75,6 +75,8 @@ public:
     explicit QWinRTWebViewPrivate(QObject *parent = nullptr);
     ~QWinRTWebViewPrivate() Q_DECL_OVERRIDE;
 
+    QString httpUserAgent() const Q_DECL_OVERRIDE;
+    void setHttpUserAgent(const QString &userAgent) Q_DECL_OVERRIDE;
     QUrl url() const Q_DECL_OVERRIDE;
     void setUrl(const QUrl &url) Q_DECL_OVERRIDE;
     bool canGoBack() const Q_DECL_OVERRIDE;
diff --git a/src/plugins/winrt/winrt.pro b/src/plugins/winrt/winrt.pro
index dabcbfd..827b4ef 100644
--- a/src/plugins/winrt/winrt.pro
+++ b/src/plugins/winrt/winrt.pro
@@ -1,5 +1,6 @@
 TARGET = qtwebview_winrt
 QT += core gui webview-private
+LIBS_PRIVATE += -lurlmon
 
 PLUGIN_TYPE = webview
 PLUGIN_CLASS_NAME = QWinrtWebViewPlugin
@@ -15,6 +16,15 @@ SOURCES += \
 HEADERS += \
     qwinrtwebview_p.h
 
+WINDOWS_SDK_VERSION_STRING = $$(WindowsSDKVersion)
+WINDOWS_SDK_VERSION = $$member($$list($$split(WINDOWS_SDK_VERSION_STRING, .)), 2)
+
+lessThan(WINDOWS_SDK_VERSION, 16299) {
+    DEFINES += QT_WINRT_URLMKGETSESSIONOPTION_NOT_AVAILABLE
+    DEFINES += QT_WINRT_URLMKSETSESSIONOPTION_NOT_AVAILABLE
+    DEFINES += QT_UCRTVERSION=$$WINDOWS_SDK_VERSION
+}
+
 OTHER_FILES +=
 
 DISTFILES += \
diff --git a/src/webview/qabstractwebview_p.h b/src/webview/qabstractwebview_p.h
index d2eec30..e7c5653 100644
--- a/src/webview/qabstractwebview_p.h
+++ b/src/webview/qabstractwebview_p.h
@@ -70,6 +70,7 @@ Q_SIGNALS:
     void loadProgressChanged(int progress);
     void javaScriptResult(int id, const QVariant &result);
     void requestFocus(bool focus);
+    void httpUserAgentChanged(const QString &httpUserAgent);
 
 protected:
     explicit QAbstractWebView(QObject *p = 0) : QObject(p) { }
diff --git a/src/webview/qquickwebview.cpp b/src/webview/qquickwebview.cpp
index 898154e..4441df4 100644
--- a/src/webview/qquickwebview.cpp
+++ b/src/webview/qquickwebview.cpp
@@ -101,6 +101,7 @@ QQuickWebView::QQuickWebView(QQuickItem *parent)
     connect(m_webView, &QWebView::loadingChanged, this, &QQuickWebView::onLoadingChanged);
     connect(m_webView, &QWebView::requestFocus, this, &QQuickWebView::onFocusRequest);
     connect(m_webView, &QWebView::javaScriptResult, this, &QQuickWebView::onRunJavaScriptResult);
+    connect(m_webView, &QWebView::httpUserAgentChanged, this, &QQuickWebView::httpUserAgentChanged);
 }
 
 QQuickWebView::~QQuickWebView()
@@ -108,6 +109,24 @@ QQuickWebView::~QQuickWebView()
 }
 
 /*!
+  \qmlproperty url QtWebView::WebView::httpUserAgent
+  \since QtWebView 1.14
+  The user agent in use.
+
+  \note on WinRT, this property affects all WebViews of the application.
+*/
+
+void QQuickWebView::setHttpUserAgent(const QString &userAgent)
+{
+    m_webView->setHttpUserAgent(userAgent);
+}
+
+QString QQuickWebView::httpUserAgent() const
+{
+    return m_webView->httpUserAgent();
+}
+
+/*!
   \qmlproperty url QtWebView::WebView::url
 
   The URL of currently loaded web page. Changing this will trigger
diff --git a/src/webview/qquickwebview_p.h b/src/webview/qquickwebview_p.h
index 6534815..fef5af9 100644
--- a/src/webview/qquickwebview_p.h
+++ b/src/webview/qquickwebview_p.h
@@ -60,6 +60,7 @@ class QWebViewLoadRequestPrivate;
 class Q_WEBVIEW_EXPORT QQuickWebView : public QQuickViewController, public QWebViewInterface
 {
     Q_OBJECT
+    Q_PROPERTY(QString httpUserAgent READ httpUserAgent WRITE setHttpUserAgent NOTIFY httpUserAgentChanged REVISION 14)
     Q_PROPERTY(QUrl url READ url WRITE setUrl NOTIFY urlChanged)
     Q_PROPERTY(bool loading READ isLoading NOTIFY loadingChanged REVISION 1)
     Q_PROPERTY(int loadProgress READ loadProgress NOTIFY loadProgressChanged)
@@ -79,6 +80,8 @@ public:
     QQuickWebView(QQuickItem *parent = 0);
     ~QQuickWebView();
 
+    QString httpUserAgent() const Q_DECL_OVERRIDE;
+    void setHttpUserAgent(const QString &userAgent) Q_DECL_OVERRIDE;
     QUrl url() const Q_DECL_OVERRIDE;
     void setUrl(const QUrl &url) Q_DECL_OVERRIDE;
     int loadProgress() const Q_DECL_OVERRIDE;
@@ -101,6 +104,7 @@ Q_SIGNALS:
     void urlChanged();
     Q_REVISION(1) void loadingChanged(QQuickWebViewLoadRequest *loadRequest);
     void loadProgressChanged();
+    Q_REVISION(14) void httpUserAgentChanged();
 
 protected:
     void itemChange(ItemChange change, const ItemChangeData &value) Q_DECL_OVERRIDE;
diff --git a/src/webview/qwebview.cpp b/src/webview/qwebview.cpp
index 7e457be..943218b 100644
--- a/src/webview/qwebview.cpp
+++ b/src/webview/qwebview.cpp
@@ -54,6 +54,7 @@ QWebView::QWebView(QObject *p)
     connect(d, &QAbstractWebView::urlChanged, this, &QWebView::onUrlChanged);
     connect(d, &QAbstractWebView::loadingChanged, this, &QWebView::onLoadingChanged);
     connect(d, &QAbstractWebView::loadProgressChanged, this, &QWebView::onLoadProgressChanged);
+    connect(d, &QAbstractWebView::httpUserAgentChanged, this, &QWebView::onHttpUserAgentChanged);
     connect(d, &QAbstractWebView::requestFocus, this, &QWebView::requestFocus);
     connect(d, &QAbstractWebView::javaScriptResult,
             this, &QWebView::javaScriptResult);
@@ -63,6 +64,19 @@ QWebView::~QWebView()
 {
 }
 
+QString QWebView::httpUserAgent() const
+{
+    if (m_httpUserAgent.isEmpty()){
+        m_httpUserAgent = d->httpUserAgent();
+    }
+    return m_httpUserAgent;
+}
+
+void QWebView::setHttpUserAgent(const QString &userAgent)
+{
+    return d->setHttpUserAgent(userAgent);
+}
+
 QUrl QWebView::url() const
 {
     return m_url;
@@ -193,7 +207,14 @@ void QWebView::onLoadingChanged(const QWebViewLoadRequestPrivate &loadRequest)
 
     onUrlChanged(loadRequest.m_url);
     Q_EMIT loadingChanged(loadRequest);
+}
 
+void QWebView::onHttpUserAgentChanged(const QString &userAgent)
+{
+    if (m_httpUserAgent == userAgent)
+        return;
+    m_httpUserAgent = userAgent;
+    Q_EMIT httpUserAgentChanged();
 }
 
 void QWebView::init()
diff --git a/src/webview/qwebview_p.h b/src/webview/qwebview_p.h
index aa09f03..380d701 100644
--- a/src/webview/qwebview_p.h
+++ b/src/webview/qwebview_p.h
@@ -77,6 +77,8 @@ public:
     explicit QWebView(QObject *p = 0);
     ~QWebView() Q_DECL_OVERRIDE;
 
+    QString httpUserAgent() const Q_DECL_OVERRIDE;
+    void setHttpUserAgent(const QString &httpUserAgent) Q_DECL_OVERRIDE;
     QUrl url() const Q_DECL_OVERRIDE;
     void setUrl(const QUrl &url) Q_DECL_OVERRIDE;
     bool canGoBack() const Q_DECL_OVERRIDE;
@@ -106,6 +108,7 @@ Q_SIGNALS:
     void loadProgressChanged();
     void javaScriptResult(int id, const QVariant &result);
     void requestFocus(bool focus);
+    void httpUserAgentChanged();
 
 protected:
     void init() Q_DECL_OVERRIDE;
@@ -117,6 +120,7 @@ private Q_SLOTS:
     void onUrlChanged(const QUrl &url);
     void onLoadProgressChanged(int progress);
     void onLoadingChanged(const QWebViewLoadRequestPrivate &loadRequest);
+    void onHttpUserAgentChanged(const QString &httpUserAgent);
 
 private:
     friend class QQuickViewController;
@@ -128,6 +132,7 @@ private:
     int m_progress;
     QString m_title;
     QUrl m_url;
+    mutable QString m_httpUserAgent;
 };
 
 QT_END_NAMESPACE
diff --git a/src/webview/qwebviewfactory.cpp b/src/webview/qwebviewfactory.cpp
index 7a22fd1..8856168 100644
--- a/src/webview/qwebviewfactory.cpp
+++ b/src/webview/qwebviewfactory.cpp
@@ -64,6 +64,8 @@ public:
     void setVisibility(QWindow::Visibility visibility) override { Q_UNUSED(visibility); }
     void setVisible(bool visible) override { Q_UNUSED(visible); }
 
+    QString httpUserAgent() const override { return QString(); }
+    void setHttpUserAgent(const QString &userAgent) override { Q_UNUSED(userAgent) }
     QUrl url() const override { return QUrl(); }
     void setUrl(const QUrl &url) override { Q_UNUSED(url); }
     bool canGoBack() const override { return false; }
diff --git a/src/webview/qwebviewinterface_p.h b/src/webview/qwebviewinterface_p.h
index a3216da..d9e566c 100644
--- a/src/webview/qwebviewinterface_p.h
+++ b/src/webview/qwebviewinterface_p.h
@@ -63,6 +63,8 @@ class QWebViewInterface
 {
 public:
     virtual ~QWebViewInterface() {}
+    virtual QString httpUserAgent() const = 0;
+    virtual void setHttpUserAgent(const QString &httpUserAgent) = 0;
     virtual QUrl url() const = 0;
     virtual void setUrl(const QUrl &url) = 0;
     virtual bool canGoBack() const = 0;