network manager changes:

- add QgsNetworkAccessManager to core as singleton
- add support for multiple proxy factories
- remove qgisNetworkAccessManager property hack
- python bindings

wms provider:
- use QgsNetworkAccessManager
- some precision changes



git-svn-id: http://svn.osgeo.org/qgis/trunk/qgis@13443 c8812cc2-4d05-0410-92ff-de0c093fc19c

python/core/core.sip

@@ -79,4 +79,6 @@
 %Include qgsvectorlayer.sip
 %Include qgsvectoroverlay.sip
 
+%Include qgsnetworkaccessmanager.sip
+
 %Include symbology-ng-core.sip

python/core/qgsnetworkaccessmanager.sip

@@ -0,0 +1,51 @@
+/* 
+ * \class QgsNetworkAccessManager
+ * \brief network access manager for QGIS
+ * \ingroup core
+ * \since 1.5
+ * 
+ * This class implements the QGIS network access manager.  It's a singleton
+ * that can be used across QGIS.
+ * 
+ * Plugins can insert proxy factories and thereby redirect requests to
+ * individual proxies.
+ * 
+ * If no proxy factories are there or none returns a proxy for an URL a
+ * fallback proxy can be set.  There's also a exclude list that defines URLs
+ * that the fallback proxy should not be used for, then no proxy will be used.
+ *
+ */
+
+class QgsNetworkAccessManager : QNetworkAccessManager
+{
+%TypeHeaderCode
+#include <qgsnetworkaccessmanager.h>
+%End
+    //! returns a point to the single instance
+    // and creates that instance on the first call.
+    static QgsNetworkAccessManager *instance();
+
+    //! destructor
+    ~QgsNetworkAccessManager();
+
+    //! insert a factory into the proxy factories list
+    void insertProxyFactory(QNetworkProxyFactory *factory /TransferTo/);
+
+    //! remove a factory from the proxy factories list
+    void removeProxyFactory(QNetworkProxyFactory *factory /TransferBack/);
+
+    //! retrieve proxy factory list
+    void setDiskCache( QString directory, qint64 size );
+
+    //! retrieve fall back proxy (for urls that no factory returned proxies for)
+    const QList<QNetworkProxyFactory *> proxyFactories() const; 
+
+    //! retrieve exclude list (urls shouldn't use the fallback proxy)
+    const QStringList &excludeList() const;
+
+    //! retrieve fall back proxy (for urls that no factory returned proxies for)
+    const QNetworkProxy &fallbackProxy() const;
+
+    //! set fallback proxy and URL that shouldn't use it.
+    void setFallbackProxyAndExcludes( const QNetworkProxy &proxy, const QStringList &excludes );
+};

src/app/CMakeLists.txt

@@ -75,7 +75,6 @@ SET(QGIS_APP_SRCS
   qgsuniquevaluedialog.cpp
   qgsvectorlayerproperties.cpp
   qgsquerybuilder.cpp
-  qgsnetworkproxyfactory.cpp
 
   qgsmanageconnectionsdialog.cpp
 

src/app/qgisapp.cpp

@@ -67,7 +67,8 @@
 #include <QVBoxLayout>
 #include <QWhatsThis>
 
-#include <QNetworkAccessManager>
+#include <qgsnetworkaccessmanager.h>
+
 #include <QNetworkReply>
 #include <QNetworkProxy>
 #include <QAuthenticator>
@@ -154,7 +155,6 @@
 #include "qgsattributetabledialog.h"
 #include "qgsvectorfilewriter.h"
 #include "qgscredentialdialog.h"
-#include "qgsnetworkproxyfactory.h"
 #include "qgstilescalewidget.h"
 
 #ifdef HAVE_QWT
@@ -360,11 +360,7 @@ QgisApp::QgisApp( QSplashScreen *splash, bool restorePlugins, QWidget * parent,
     : QMainWindow( parent, fl )
     , mSplash( splash )
     , mPythonUtils( NULL )
-    , mNAM( NULL )
     , mpTileScaleWidget( NULL )
-#if QT_VERSION >= 0x40500
-    , mProxyFactory( NULL )
-#endif
 #ifdef HAVE_QWT
     , mpGpsWidget( NULL )
 #endif
@@ -6523,26 +6519,15 @@ void QgisApp::showLayerProperties( QgsMapLayer *ml )
 
 void QgisApp::namSetup()
 {
-  if ( mNAM )
-    return;
-
-  mNAM = new QNetworkAccessManager( this );
+  QgsNetworkAccessManager *nam = QgsNetworkAccessManager::instance();
 
   namUpdate();
 
-  connect( mNAM, SIGNAL( authenticationRequired( QNetworkReply *, QAuthenticator * ) ),
+  connect( nam, SIGNAL( authenticationRequired( QNetworkReply *, QAuthenticator * ) ),
            this, SLOT( namAuthenticationRequired( QNetworkReply *, QAuthenticator * ) ) );
 
-  connect( mNAM, SIGNAL( proxyAuthenticationRequired( const QNetworkProxy &, QAuthenticator * ) ),
+  connect( nam, SIGNAL( proxyAuthenticationRequired( const QNetworkProxy &, QAuthenticator * ) ),
            this, SLOT( namProxyAuthenticationRequired( const QNetworkProxy &, QAuthenticator * ) ) );
-
-  QCoreApplication::instance()->setProperty( "qgisNetworkAccessManager", qVariantFromValue<QObject*>( mNAM ) );
-}
-
-QNetworkAccessManager *QgisApp::nam()
-{
-  namSetup();
-  return mNAM;
 }
 
 void QgisApp::namAuthenticationRequired( QNetworkReply *reply, QAuthenticator *auth )
@@ -6627,15 +6612,11 @@ void QgisApp::namUpdate()
   }
 
 #if QT_VERSION >= 0x40500
-  if ( !mProxyFactory )
-  {
-    mProxyFactory = new QgsNetworkProxyFactory();
-    mNAM->setProxyFactory( mProxyFactory );
-  }
+  QgsNetworkAccessManager *nam = QgsNetworkAccessManager::instance();
 
-  mProxyFactory->setProxyAndExcludes( proxy, excludes );
+  nam->setFallbackProxyAndExcludes( proxy, excludes );
 
-  QNetworkDiskCache *cache = qobject_cast<QNetworkDiskCache*>( nam()->cache() );
+  QNetworkDiskCache *cache = qobject_cast<QNetworkDiskCache*>( nam->cache() );
   if ( !cache )
     cache = new QNetworkDiskCache( this );
 
@@ -6648,9 +6629,9 @@ void QgisApp::namUpdate()
   QgsDebugMsg( QString( "cacheDirectory: %1" ).arg( cache->cacheDirectory() ) );
   QgsDebugMsg( QString( "maximumCacheSize: %1" ).arg( cache->maximumCacheSize() ) );
 
-  if ( mNAM->cache() != cache )
-    mNAM->setCache( cache );
+  if ( nam->cache() != cache )
+    nam->setCache( cache );
 #else
-  mNAM->setProxy( proxy );
+  QgsNetworkAccessManager::instance()->setProxy( proxy );
 #endif
 }

src/app/qgisapp.h

@@ -62,7 +62,6 @@ class QgsVectorLayer;
 class QgsTileScaleWidget;
 
 class QDomDocument;
-class QNetworkAccessManager;
 class QNetworkReply;
 class QNetworkProxy;
 class QAuthenticator;
@@ -80,10 +79,6 @@ class QgsGPSInformationWidget;
 #include "qgsfeature.h"
 #include "qgspoint.h"
 
-#if QT_VERSION >= 0x40500
-class QgsNetworkProxyFactory;
-#endif
-
 /*! \class QgisApp
  * \brief Main window for the Qgis application
  */
@@ -174,9 +169,6 @@ class QgisApp : public QMainWindow
     //! update proxy settings
     void namUpdate();
 
-    //! retrieve network manager
-    QNetworkAccessManager *nam();
-
     //! Helper to get a theme icon. It will fall back to the
     //default theme if the active theme does not have the required
     //icon.
@@ -1095,15 +1087,9 @@ class QgisApp : public QMainWindow
 
     QgsUndoWidget* mUndoWidget;
 
-    QNetworkAccessManager *mNAM;
-
     //! Persistent tile scale slider
     QgsTileScaleWidget * mpTileScaleWidget;
 
-#if QT_VERSION >= 0x40500
-    QgsNetworkProxyFactory *mProxyFactory;
-#endif
-
     int mLastComposerId;
 
 #ifdef HAVE_QWT

src/app/qgsoptions.cpp

@@ -23,12 +23,12 @@
 #include "qgsgenericprojectionselector.h"
 #include "qgscoordinatereferencesystem.h"
 #include "qgstolerance.h"
+#include "qgsnetworkaccessmanager.h"
 
 #include <QFileDialog>
 #include <QSettings>
 #include <QColorDialog>
 #include <QLocale>
-#include <QNetworkAccessManager>
 
 #if QT_VERSION >= 0x40500
 #include <QNetworkDiskCache>
@@ -121,7 +121,7 @@ QgsOptions::QgsOptions( QWidget *parent, Qt::WFlags fl ) :
 
 #if QT_VERSION >= 0x40500
   // cache settings
-  QNetworkDiskCache *cache = qobject_cast<QNetworkDiskCache*>( QgisApp::instance()->nam()->cache() );
+  QNetworkDiskCache *cache = qobject_cast<QNetworkDiskCache*>( QgsNetworkAccessManager::instance()->cache() );
   if ( cache )
   {
     mCacheDirectory->setText( cache->cacheDirectory() );
@@ -873,6 +873,6 @@ void QgsOptions::on_mBrowseCacheDirectory_clicked()
 void QgsOptions::on_mClearCache_clicked()
 {
 #if QT_VERSION >= 0x40500
-  QgisApp::instance()->nam()->cache()->clear();
+  QgsNetworkAccessManager::instance()->cache()->clear();
 #endif
 }

src/app/qgswmssourceselect.cpp

@@ -33,7 +33,7 @@
 #include "qgsproject.h"
 #include "qgsproviderregistry.h"
 #include "qgswmssourceselect.h"
-#include <qgisinterface.h>
+#include "qgsnetworkaccessmanager.h"
 
 #include <QButtonGroup>
 #include <QRadioButton>
@@ -47,7 +47,6 @@
 #include <QSettings>
 #include <QUrl>
 
-#include <QNetworkAccessManager>
 #include <QNetworkRequest>
 #include <QNetworkReply>
 
@@ -1051,7 +1050,7 @@ void QgsWMSSourceSelect::on_btnSearch_clicked()
   QUrl url( mySearchUrl.arg( leSearchTerm->text() ) );
   QgsDebugMsg( url.toString() );
 
-  QNetworkReply *r = QgisApp::instance()->nam()->get( QNetworkRequest( url ) );
+  QNetworkReply *r = QgsNetworkAccessManager::instance()->get( QNetworkRequest( url ) );
   connect( r, SIGNAL( finished() ), SLOT( searchFinished() ) );
 }
 

src/core/CMakeLists.txt

@@ -88,6 +88,8 @@ SET(QGIS_CORE_SRCS
   qgsvectorlayerundocommand.cpp
   qgsvectoroverlay.cpp
 
+  qgsnetworkaccessmanager.cpp
+
   composer/qgscomposerarrow.cpp
   composer/qgscomposeritem.cpp
   composer/qgscomposeritemgroup.cpp
@@ -232,6 +234,7 @@ SET(QGIS_CORE_MOC_HDRS
   qgsrunprocess.h
   qgsvectorlayer.h
   qgsrasterdataprovider.h
+  qgsnetworkaccessmanager.h
 
   composer/qgscomposerlegend.h
   composer/qgscomposermap.h