qgis server: initialize network cache (fixes #7204)

Author: jef-n

src/mapserver/qgis_map_serv.cpp

@@ -32,7 +32,10 @@ map service syntax for SOAP/HTTP POST
 #include "qgspallabeling.h"
 #include "qgsprojectparser.h"
 #include "qgssldparser.h"
+#include "qgsnetworkaccessmanager.h"
+
 #include <QDomDocument>
+#include <QNetworkDiskCache>
 #include <QImage>
 #include <QSettings>
 #include <QDateTime>
@@ -185,6 +188,22 @@ int main( int argc, char * argv[] )
   QgsApplication::skipGdalDriver( "JP2ECW" );
 #endif
 
+  QSettings settings;
+
+  QgsNetworkAccessManager *nam = QgsNetworkAccessManager::instance();
+  QNetworkDiskCache *cache = new QNetworkDiskCache( 0 );
+
+  QString cacheDirectory = settings.value( "cache/directory", QgsApplication::qgisSettingsDirPath() + "cache" ).toString();
+  qint64 cacheSize = settings.value( "cache/size", 50 * 1024 * 1024 ).toULongLong();
+  QgsDebugMsg( QString( "setCacheDirectory: %1" ).arg( cacheDirectory ) );
+  QgsDebugMsg( QString( "setMaximumCacheSize: %1" ).arg( cacheSize ) );
+  cache->setCacheDirectory( cacheDirectory );
+  cache->setMaximumCacheSize( cacheSize );
+  QgsDebugMsg( QString( "cacheDirectory: %1" ).arg( cache->cacheDirectory() ) );
+  QgsDebugMsg( QString( "maximumCacheSize: %1" ).arg( cache->maximumCacheSize() ) );
+
+  nam->setCache( cache );
+
   QDomImplementation::setInvalidDataPolicy( QDomImplementation::DropInvalidChars );
 
   // Instantiate the plugin directory so that providers are loaded

src/providers/wms/qgswmsprovider.cpp

@@ -1055,24 +1055,27 @@ void QgsWmsProvider::tileReplyFinished()
   }
 #endif
 
-  QNetworkCacheMetaData cmd = QgsNetworkAccessManager::instance()->cache()->metaData( reply->request().url() );
-
-  QNetworkCacheMetaData::RawHeaderList hl;
-  foreach ( const QNetworkCacheMetaData::RawHeader &h, cmd.rawHeaders() )
+  if ( QgsNetworkAccessManager::instance()->cache() )
   {
-    if ( h.first != "Cache-Control" )
-      hl.append( h );
-  }
-  cmd.setRawHeaders( hl );
+    QNetworkCacheMetaData cmd = QgsNetworkAccessManager::instance()->cache()->metaData( reply->request().url() );
 
-  QgsDebugMsg( QString( "expirationDate:%1" ).arg( cmd.expirationDate().toString() ) );
-  if ( cmd.expirationDate().isNull() )
-  {
-    QSettings s;
-    cmd.setExpirationDate( QDateTime::currentDateTime().addSecs( s.value( "/qgis/defaultTileExpiry", "24" ).toInt() * 60 * 60 ) );
-  }
+    QNetworkCacheMetaData::RawHeaderList hl;
+    foreach ( const QNetworkCacheMetaData::RawHeader &h, cmd.rawHeaders() )
+    {
+      if ( h.first != "Cache-Control" )
+        hl.append( h );
+    }
+    cmd.setRawHeaders( hl );
 
-  QgsNetworkAccessManager::instance()->cache()->updateMetaData( cmd );
+    QgsDebugMsg( QString( "expirationDate:%1" ).arg( cmd.expirationDate().toString() ) );
+    if ( cmd.expirationDate().isNull() )
+    {
+      QSettings s;
+      cmd.setExpirationDate( QDateTime::currentDateTime().addSecs( s.value( "/qgis/defaultTileExpiry", "24" ).toInt() * 60 * 60 ) );
+    }
+
+    QgsNetworkAccessManager::instance()->cache()->updateMetaData( cmd );
+  }
 
   int tileReqNo = reply->request().attribute( static_cast<QNetworkRequest::Attribute>( QNetworkRequest::User + 0 ) ).toInt();
   int tileNo = reply->request().attribute( static_cast<QNetworkRequest::Attribute>( QNetworkRequest::User + 1 ) ).toInt();