Can rewrite change port? for eg, 80 to 443

[baalchina]

Hi, everyone.

I have a server running a php web forum. User logging into my site
using 'logging.php'.

I had set up a https server using nginx, but consdering server load, I
just want my user using https in only logging.php.

I want to settle this by using url rewrite. When my users click
http://mysite.com/logging.php, nginx will automatic change the url to
https://mysite.com/logging.php. And when my user click any other links
in my site, for example, https://mysite.com/index.php, nginx will
change https to http.

Can rewrite work like this?

Thank you!

BTW,changing my forum codes may work, but I didn't know much about php
coding...so, I want to settle this in nginx rewrite...

-- 
from:baalchina