RewriteCond %{HTTPS} !=on
  RewriteCond %{REQUEST_URI} ^/admin(.*)$ [OR]
  RewriteCond %{REQUEST_URI} ^/user(.*)$
  RewriteCond %{HTTP:X-Requested-With} ^$
  RewriteRule .* https://%{SERVER_NAME}%{REQUEST_URI} [L,R=301]
  RewriteCond %{HTTPS} =on
  RewriteCond %{REQUEST_URI} !^/admin(.*)$
  RewriteCond %{REQUEST_URI} !^/user(.*)$
  RewriteCond %{REQUEST_FILENAME} !-f
  RewriteCond %{HTTP:X-Requested-With} ^$
  RewriteRule (.*)  http://%{SERVER_NAME}%{REQUEST_URI} [L,R=301]