Try to fix proxy for webengine.

.appveyor.yml

@@ -5,7 +5,7 @@ clone_depth: 1
 clone_folder: C:\rssguard
 
 environment:
-  QTDIR: 'C:\Qt\5.12\msvc2017_64'
+  QTDIR: 'C:\Qt\5.14.2\msvc2017_64'
   QMAKESPEC: win32-msvc
   access_token:
     secure: oR2iY1h+Z5AF4t3yP1mxNW7HL8qhPm8y4Uupp4b03QSC7puVrkkCaO1E1NQA9q9K

resources/binaries

@@ -1 +1 @@
-Subproject commit 6bd7ec93a76a14de24f9dbb8570b4d68eb4b27be
+Subproject commit 2bd2ee0af492cabea6fda7bb04790245e3039c4c

src/librssguard/gui/settings/settingsbrowsermail.cpp

@@ -6,6 +6,7 @@
 #include "miscellaneous/application.h"
 #include "miscellaneous/externaltool.h"
 #include "network-web/silentnetworkaccessmanager.h"
+#include "network-web/webfactory.h"
 
 #include <QFileDialog>
 #include <QInputDialog>
@@ -224,6 +225,8 @@ void SettingsBrowserMail::saveSettings() {
 
   ExternalTool::setToolsToSettings(tools);
 
+  qApp->web()->updateProxy();
+
   // Reload settings for all network access managers.
   SilentNetworkAccessManager::instance()->loadSettings();
   onEndSaveSettings();

src/librssguard/miscellaneous/application.cpp

@@ -80,6 +80,8 @@ Application::Application(const QString& id, int& argc, char** argv)
     Debugging::instance()->setTargetFile(IOFactory::getSystemFolder(QStandardPaths::TempLocation) +
                                          QDir::separator() + QL1S("rssguard.log"));
   }
+
+  m_webFactory->updateProxy();
 }
 
 Application::~Application() {

src/librssguard/network-web/basenetworkaccessmanager.cpp

@@ -27,19 +27,8 @@ void BaseNetworkAccessManager::loadSettings() {
     // No extra setting is needed, set new proxy and exit this method.
     setProxy(QNetworkProxy::NoProxy);
   }
-  else if (selected_proxy_type == QNetworkProxy::DefaultProxy) {
-    setProxy(QNetworkProxy::applicationProxy());
-  }
   else {
-    const Settings* settings = qApp->settings();
-
-    // Custom proxy is selected, set it up.
-    new_proxy.setType(selected_proxy_type);
-    new_proxy.setHostName(settings->value(GROUP(Proxy), SETTING(Proxy::Host)).toString());
-    new_proxy.setPort(quint16(settings->value(GROUP(Proxy), SETTING(Proxy::Port)).toInt()));
-    new_proxy.setUser(settings->value(GROUP(Proxy), SETTING(Proxy::Username)).toString());
-    new_proxy.setPassword(settings->password(GROUP(Proxy), SETTING(Proxy::Password)).toString());
-    setProxy(new_proxy);
+    setProxy(QNetworkProxy::applicationProxy());
   }
 
   qDebug("Settings of BaseNetworkAccessManager loaded.");

src/librssguard/network-web/webfactory.cpp

@@ -124,6 +124,33 @@ QString WebFactory::toSecondLevelDomain(const QUrl& url) {
   return domain + top_level_domain;
 }
 
+void WebFactory::updateProxy() {
+  const QNetworkProxy::ProxyType selected_proxy_type = static_cast<QNetworkProxy::ProxyType>(qApp->settings()->value(GROUP(Proxy),
+                                                                                                                     SETTING(Proxy::Type)).
+                                                                                             toInt());
+
+  if (selected_proxy_type == QNetworkProxy::NoProxy) {
+    QNetworkProxyFactory::setUseSystemConfiguration(false);
+    QNetworkProxy::setApplicationProxy(QNetworkProxy::NoProxy);
+  }
+  else if (selected_proxy_type == QNetworkProxy::DefaultProxy) {
+    QNetworkProxyFactory::setUseSystemConfiguration(true);
+  }
+  else {
+    const Settings* settings = qApp->settings();
+    QNetworkProxy new_proxy;
+
+    // Custom proxy is selected, set it up.
+    new_proxy.setType(selected_proxy_type);
+    new_proxy.setHostName(settings->value(GROUP(Proxy), SETTING(Proxy::Host)).toString());
+    new_proxy.setPort(quint16(settings->value(GROUP(Proxy), SETTING(Proxy::Port)).toInt()));
+    new_proxy.setUser(settings->value(GROUP(Proxy), SETTING(Proxy::Username)).toString());
+    new_proxy.setPassword(settings->password(GROUP(Proxy), SETTING(Proxy::Password)).toString());
+
+    QNetworkProxy::setApplicationProxy(new_proxy);
+  }
+}
+
 #if defined (USE_WEBENGINE)
 QAction* WebFactory::engineSettingsAction() {
   if (m_engineSettings == nullptr) {

src/librssguard/network-web/webfactory.h

@@ -38,6 +38,7 @@ class WebFactory : public QObject {
 #endif
 
   public slots:
+    void updateProxy();
     bool openUrlInExternalBrowser(const QString& url) const;
     bool sendMessageViaEmail(const Message& message);