network manager: fix authentication of private network manager instances and support system proxies with exclusions

Author: jef-n

src/app/qgsoptions.cpp

@@ -860,6 +860,14 @@ void QgsOptions::setCurrentPage( QString pageWidgetName )
   }
 }
 
+void QgsOptions::on_mProxyTypeComboBox_currentIndexChanged( int idx )
+{
+  leProxyHost->setEnabled( idx != 0 );
+  leProxyPort->setEnabled( idx != 0 );
+  leProxyUser->setEnabled( idx != 0 );
+  leProxyPassword->setEnabled( idx != 0 );
+}
+
 void QgsOptions::on_cbxProjectDefaultNew_toggled( bool checked )
 {
   if ( checked )

src/app/qgsoptions.h

@@ -135,6 +135,8 @@ class APP_EXPORT QgsOptions : public QgsOptionsDialogBase, private Ui::QgsOption
      */
     void on_mBoldGroupBoxTitleChkBx_clicked( bool chkd );
 
+    void on_mProxyTypeComboBox_currentIndexChanged( int idx );
+
     /**Add a new URL to exclude from Proxy*/
     void on_mAddUrlPushButton_clicked();
 

src/core/qgsnetworkaccessmanager.cpp

@@ -69,20 +69,32 @@ class QgsNetworkProxyFactory : public QNetworkProxyFactory
         }
       }
 
-      QgsDebugMsg( QString( "using user proxy for %1" ).arg( url ) );
+      if ( nam->useSystemProxy() )
+      {
+        QgsDebugMsg( QString( "requesting system proxy for query %1" ).arg( url ) );
+        QList<QNetworkProxy> proxies = QNetworkProxyFactory::systemProxyForQuery( query );
+        if ( !proxies.isEmpty() )
+        {
+          QgsDebugMsg( QString( "using system proxy %1:%2 for query" )
+                       .arg( proxies.first().hostName() ).arg( proxies.first().port() ) );
+          return proxies;
+        }
+      }
+
+      QgsDebugMsg( QString( "using fallback proxy for %1" ).arg( url ) );
       return QList<QNetworkProxy>() << nam->fallbackProxy();
     }
 };
 
 QgsNetworkAccessManager *QgsNetworkAccessManager::instance()
 {
   static QgsNetworkAccessManager sInstance;
-
   return &sInstance;
 }
 
 QgsNetworkAccessManager::QgsNetworkAccessManager( QObject *parent )
     : QNetworkAccessManager( parent )
+    , mUseSystemProxy( false )
 {
   setProxyFactory( new QgsNetworkProxyFactory() );
 }
@@ -230,7 +242,30 @@ void QgsNetworkAccessManager::setupDefaultProxyAndCache()
 
   QSettings settings;
 
-  //check if proxy is enabled
+  mUseSystemProxy = false;
+
+  if ( this != instance() )
+  {
+    connect( this, SIGNAL( authenticationRequired( QNetworkReply *, QAuthenticator * ) ),
+             instance(), SIGNAL( authenticationRequired( QNetworkReply *, QAuthenticator * ) ),
+             Qt::BlockingQueuedConnection );
+
+    connect( this, SIGNAL( proxyAuthenticationRequired( const QNetworkProxy &, QAuthenticator * ) ),
+             instance(), SIGNAL( proxyAuthenticationRequired( const QNetworkProxy &, QAuthenticator * ) ),
+             Qt::BlockingQueuedConnection );
+
+    connect( this, SIGNAL( requestTimedOut( QNetworkReply* ) ),
+             instance(), SIGNAL( requestTimedOut( QNetworkReply* ) ),
+             Qt::BlockingQueuedConnection );
+
+#ifndef QT_NO_OPENSSL
+    connect( this, SIGNAL( sslErrors( QNetworkReply *, const QList<QSslError> & ) ),
+             instance(), SIGNAL( sslErrors( QNetworkReply *, const QList<QSslError> & ) ),
+             Qt::BlockingQueuedConnection );
+#endif
+  }
+
+  // check if proxy is enabled
   bool proxyEnabled = settings.value( "proxy/proxyEnabled", false ).toBool();
   if ( proxyEnabled )
   {
@@ -243,24 +278,21 @@ void QgsNetworkAccessManager::setupDefaultProxyAndCache()
     QString proxyPassword = settings.value( "proxy/proxyPassword", "" ).toString();
 
     QString proxyTypeString = settings.value( "proxy/proxyType", "" ).toString();
-    QNetworkProxy::ProxyType proxyType = QNetworkProxy::NoProxy;
+
     if ( proxyTypeString == "DefaultProxy" )
     {
-      proxyType = QNetworkProxy::DefaultProxy;
-
-#if defined(Q_OS_WIN)
+      mUseSystemProxy = true;
       QNetworkProxyFactory::setUseSystemConfiguration( true );
       QList<QNetworkProxy> proxies = QNetworkProxyFactory::systemProxyForQuery();
       if ( !proxies.isEmpty() )
       {
         proxy = proxies.first();
       }
-#endif
-
       QgsDebugMsg( "setting default proxy" );
     }
     else
     {
+      QNetworkProxy::ProxyType proxyType = QNetworkProxy::DefaultProxy;
       if ( proxyTypeString == "Socks5Proxy" )
       {
         proxyType = QNetworkProxy::Socks5Proxy;

src/core/qgsnetworkaccessmanager.h

@@ -82,6 +82,8 @@ class CORE_EXPORT QgsNetworkAccessManager : public QNetworkAccessManager
     //! Setup the NAM according to the user's settings
     void setupDefaultProxyAndCache();
 
+    bool useSystemProxy() { return mUseSystemProxy; }
+
   signals:
     void requestAboutToBeCreated( QNetworkAccessManager::Operation, const QNetworkRequest &, QIODevice * );
     void requestCreated( QNetworkReply * );
@@ -97,6 +99,7 @@ class CORE_EXPORT QgsNetworkAccessManager : public QNetworkAccessManager
     QList<QNetworkProxyFactory*> mProxyFactories;
     QNetworkProxy mFallbackProxy;
     QStringList mExcludedURLs;
+    bool mUseSystemProxy;
 };
 
 #endif // QGSNETWORKACCESSMANAGER_H