Reading a file from an URL and storinig it as a BLOB

In this example at apex.oracle.com you can se how you can use an URL (which normaly provides a save/download dialog for saving or opening a document) to store the document directly in your own table as a BLOB. Unfortunatelly the ACL settings at apex.oracle.com do not allow to get this working there and the working example is just a fake, showing only how this should normaly work.