redirect http to https

NameVirtualHost *:80
<VirtualHost *:80>
   ServerName www.example.com
   Redirect permanent / https://secure.example.com/
</VirtualHost>

<VirtualHost _default_:443>
   ServerName secure.example.com
   DocumentRoot /usr/local/apache2/htdocs
   SSLEngine On
# etc...
</VirtualHost>