Added an option to hide GoldenDict identification in the HTTP User-Agent headers (Issue #259).

A new preference in the "Network" tab is added:
* Do not identify GoldenDict in HTTP headers.

article_netmgr.cc

@@ -112,6 +112,14 @@ QNetworkReply * ArticleNetworkAccessManager::createRequest( Operation op,
     }
   }
 
+  // spoof User-Agent
+  if ( hideGoldenDictHeader && req.url().scheme().startsWith("http", Qt::CaseInsensitive))
+  {
+    QNetworkRequest newReq( req );
+    newReq.setRawHeader("User-Agent", req.rawHeader("User-Agent").replace(qApp->applicationName(), ""));
+    return QNetworkAccessManager::createRequest( op, newReq, outgoingData );
+  }
+
   return QNetworkAccessManager::createRequest( op, req, outgoingData );
 }
 

article_netmgr.hh

@@ -18,6 +18,7 @@ class ArticleNetworkAccessManager: public QNetworkAccessManager
   vector< sptr< Dictionary::Class > > const & dictionaries;
   ArticleMaker const & articleMaker;
   bool const & disallowContentFromOtherSites;
+  bool const & hideGoldenDictHeader;
 
 public:
 
@@ -25,10 +26,12 @@ public:
                                vector< sptr< Dictionary::Class > > const &
                                dictionaries_,
                                ArticleMaker const & articleMaker_,
-                               bool const & disallowContentFromOtherSites_ ):
+                               bool const & disallowContentFromOtherSites_,
+                               bool const & hideGoldenDictHeader_ ):
     QNetworkAccessManager( parent ), dictionaries( dictionaries_ ),
     articleMaker( articleMaker_ ),
-    disallowContentFromOtherSites( disallowContentFromOtherSites_ )
+    disallowContentFromOtherSites( disallowContentFromOtherSites_ ),
+    hideGoldenDictHeader( hideGoldenDictHeader_ )
   {}
 
   /// Tries handling any kind of internal resources referenced by dictionaries.

config.cc

@@ -115,6 +115,7 @@ Preferences::Preferences():
   checkForNewReleases( true ),
   disallowContentFromOtherSites( false ),
   enableWebPlugins( false ),
+  hideGoldenDictHeader( false ),
   zoomFactor( 1 ),
   wordsZoomLevel( 0 ),
   maxStringsInHistory( 500 ),
@@ -707,6 +708,9 @@ Class load() throw( exError )
     if ( !preferences.namedItem( "enableWebPlugins" ).isNull() )
       c.preferences.enableWebPlugins = ( preferences.namedItem( "enableWebPlugins" ).toElement().text() == "1" );
 
+    if ( !preferences.namedItem( "hideGoldenDictHeader" ).isNull() )
+      c.preferences.hideGoldenDictHeader = ( preferences.namedItem( "hideGoldenDictHeader" ).toElement().text() == "1" );
+
     if ( !preferences.namedItem( "maxStringsInHistory" ).isNull() )
       c.preferences.maxStringsInHistory = preferences.namedItem( "maxStringsInHistory" ).toElement().text().toUInt() ;
 
@@ -1418,6 +1422,10 @@ void save( Class const & c ) throw( exError )
     opt.appendChild( dd.createTextNode( c.preferences.enableWebPlugins ? "1" : "0" ) );
     preferences.appendChild( opt );
 
+    opt = dd.createElement( "hideGoldenDictHeader" );
+    opt.appendChild( dd.createTextNode( c.preferences.hideGoldenDictHeader ? "1" : "0" ) );
+    preferences.appendChild( opt );
+
     opt = dd.createElement( "maxStringsInHistory" );
     opt.appendChild( dd.createTextNode( QString::number( c.preferences.maxStringsInHistory ) ) );
     preferences.appendChild( opt );

config.hh

@@ -196,6 +196,7 @@ struct Preferences
   bool checkForNewReleases;
   bool disallowContentFromOtherSites;
   bool enableWebPlugins;
+  bool hideGoldenDictHeader;
 
   qreal zoomFactor;
   int wordsZoomLevel;

mainwindow.cc

@@ -71,7 +71,7 @@ MainWindow::MainWindow( Config::Class & cfg_ ):
   articleMaker( dictionaries, groupInstances, cfg.preferences.displayStyle,
                 cfg.preferences.addonStyle ),
   articleNetMgr( this, dictionaries, articleMaker,
-                 cfg.preferences.disallowContentFromOtherSites ),
+                 cfg.preferences.disallowContentFromOtherSites, cfg.preferences.hideGoldenDictHeader ),
   dictNetMgr( this ),
   wordFinder( this ),
   newReleaseCheckTimer( this ),

preferences.cc

@@ -189,6 +189,7 @@ Preferences::Preferences( QWidget * parent, Config::Preferences const & p ):
   ui.checkForNewReleases->setChecked( p.checkForNewReleases );
   ui.disallowContentFromOtherSites->setChecked( p.disallowContentFromOtherSites );
   ui.enableWebPlugins->setChecked( p.enableWebPlugins );
+  ui.hideGoldenDictHeader->setChecked( p.hideGoldenDictHeader );
 
   // Add-on styles
   ui.addonStylesLabel->setVisible( ui.addonStyles->count() > 1 );
@@ -270,6 +271,7 @@ Config::Preferences Preferences::getPreferences()
   p.checkForNewReleases = ui.checkForNewReleases->isChecked();
   p.disallowContentFromOtherSites = ui.disallowContentFromOtherSites->isChecked();
   p.enableWebPlugins = ui.enableWebPlugins->isChecked();
+  p.hideGoldenDictHeader = ui.hideGoldenDictHeader->isChecked();
 
   p.addonStyle = ui.addonStyles->getCurrentStyle();
 

preferences.ui

@@ -996,6 +996,17 @@ Plugin must be installed for this option to work.</string>
          </property>
         </widget>
        </item>
+       <item>
+        <widget class="QCheckBox" name="hideGoldenDictHeader">
+         <property name="toolTip">
+          <string>Some sites detect GoldenDict via HTTP headers and block the requests.
+Enable this option to workaround the problem.</string>
+         </property>
+         <property name="text">
+          <string>Do not identify GoldenDict in HTTP headers</string>
+         </property>
+        </widget>
+       </item>
        <item>
         <spacer name="verticalSpacer_10">
          <property name="orientation">