<IfModule mod_rewrite.c> 
RewriteEngine on
RewriteCond %{HTTPS} off
RewriteRule (.*) https://%{HTTP_HOST}%{REQUEST_URI} [R=301,L]
RewriteCond %{HTTP_HOST} ^ifengling.cn [NC]
RewriteRule ^(.*)$ http://www.ifengling.cn/$1 [L,R=301]
</IfModule>