htaccess redirect to www excluding subdomains both https and http

Question

So this is what I currently have, I'm trying to redirect http://something.com to http://www.something.com but if its a subdomain do no such things, so http://other.somethings.com will stay the same AND conditional based on https/http

Currently have..

RewriteCond %{HTTP_HOST} !^www\.

RewriteRule ^(.*)$ http://www.%{HTTP_HOST}/$1 [R=301,L] 

Answer 1

It's not that difficult, although it is a bit tedious. There's another rewrite conditional variable called HTTPS which is safe to use even when you don't have mod_ssl running. You'd then chain two RewriteCond checks, and get something like this:

RewriteCond %{HTTPS} on
RewriteCond %{HTTP_HOST} !^something\.com$
RewriteRule ^(.*)$ https://www.something.com/$1 [R=301,L]

RewriteCond %{HTTPS} off
RewriteCond %{HTTP_HOST} !^something\.com$
RewriteRule ^(.*)$ http://www.something.com/$1 [R=301,L]

The downside is that you are now hardcoding the domain in question into the .htaccess. I'm not aware of a way to make it work without hardcoding the domain.

Answer 2

Try this rule:

RewriteCond %{HTTP_HOST} =example.com
RewriteCond %{HTTPS}s ^on(s)|
RewriteRule ^ http%1://www.%{HTTP_HOST}%{REQUEST_URI} [L,R=301]

This will only redirect requests to the host example.com and keep HTTPS if it’s used.