Secure Url with mod_rewrite and symfony - .htaccess

Question

I have few pages which need to be secured through mod_rewrite and the code is based on mvc architecture
Let me say I have a page login its url is http://www.example.com/login it needs to be redirected to https://www.example.com/login
If any url other than desired secured url uses https we need to change it to http for example
https://www.example.com/sitemap must be redirected to http://www.example.com/sitemap
I am using the following code in .htaccess
RewriteCond %{SERVER_PORT} !^443$
RewriteRule ^login$ https://%{HTTP_HOST}/login [R=301,L]
RewriteCond %{SERVER_PORT} ^443$
RewriteCond %{REQUEST_URI} !^/login$
RewriteRule ^(.*)$ http://%{HTTP_HOST}/$1 [R=301,L]
# we check if the .html version is here (caching)
RewriteRule ^$ index.html [QSA]
RewriteRule ^([^.]+)$ $1.html [QSA]
RewriteCond %{REQUEST_FILENAME} !-f
# no, so we redirect to our front web controller
RewriteRule ^(.*)$ index.php [QSA,L]
The problem I get is, it gets looped where it says "server is redirecting the request for this address in a way that will never complete".
Can you please help me out with the solution where only the following urls are secured and others are not. I need a solution with .htaccess and not with any symfony plugin.
https://www.example.com/login
https://www.example.com/account
https://www.example.com/register
Thanks
Nizam

Answer 1

I think the problem is an unwanted slash in your fifth line's regex. Try this
RewriteCond %{SERVER_PORT} !^443$
RewriteRule ^login$ https://%{HTTP_HOST}/login [R=301,L]
RewriteCond %{SERVER_PORT} ^443$
RewriteCond %{REQUEST_URI} !^login$
RewriteRule ^(.*)$ http://%{HTTP_HOST}/$1 [R=301,L]

Answer 2

This worked perfectly for me
# SSL here
RewriteCond %{SERVER_PORT} !^443$
RewriteRule ^/?(login|account|register|mypage)(.*) https://%{HTTP_HOST}/$1$2 [R,L]
# not anywhere else
RewriteCond %{SERVER_PORT} !^80$
RewriteCond %{REQUEST_URI} !^/?(login|account|register|mypage)(.*)
RewriteCond %{REQUEST_URI} !^/?index\.php$
RewriteRule .? http://%{HTTP_HOST}%{REQUEST_URI} [R,L]
Thanks Prem, Amar, Harry for the solution.