--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/eric6/Helpviewer/Network/NetworkDiskCache.py	Sun Apr 14 15:09:21 2019 +0200
@@ -0,0 +1,31 @@
+# -*- coding: utf-8 -*-
+
+# Copyright (c) 2009 - 2019 Detlev Offenbach <detlev@die-offenbachs.de>
+#
+
+"""
+Module implementing a disk cache respecting privacy.
+"""
+
+from __future__ import unicode_literals
+
+from PyQt5.QtWebKit import QWebSettings
+from PyQt5.QtNetwork import QNetworkDiskCache
+
+
+class NetworkDiskCache(QNetworkDiskCache):
+    """
+    Class implementing a disk cache respecting privacy.
+    """
+    def prepare(self, metaData):
+        """
+        Public method to prepare the disk cache file.
+        
+        @param metaData meta data for a URL (QNetworkCacheMetaData)
+        @return reference to the IO device (QIODevice)
+        """
+        if QWebSettings.globalSettings().testAttribute(
+                QWebSettings.PrivateBrowsingEnabled):
+            return None
+        
+        return QNetworkDiskCache.prepare(self, metaData)