Rewrite directory to subdomain - .htaccess

Question

I have a page with two subdomains: cw.sidenote.hu and cellwars.sidenote.hu, both point to sidenote.hu/cellwars/.
What I'd like to achieve that when I visit cw.sidenote.hu or cellwars.sidenote.hu that the URL change to/stay in cellwars.sidenote.hu format, and don't change to sidenote.hu/cellwars/.
This is what I currently have in my .htaccess file:
RewriteEngine on
# Some hosts require a rewritebase rule, if so, uncomment the RewriteBase line below. If you are running from a subdirectory, your rewritebase should match the name of the path to where stacey is stored.
# ie. if in a folder named 'stacey', RewriteBase /stacey
#RewriteBase /cellwars
ErrorDocument 404 /404.html
# Rewrite any calls to *.html, *.json, *.xml, *.atom, *.rss, *.rdf or *.txt if a folder matching * exists
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_URI} !public/
RewriteCond %{DOCUMENT_ROOT}/public/$1.$2 !-f
RewriteRule (.+)\.(html|json|xml|atom|rss|rdf|txt)$ $1/ [L]
# Add a trailing slash to directories
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteCond %{REQUEST_URI} !(\.)
RewriteCond %{REQUEST_URI} !(.*)/$
RewriteRule ([^/]+)$ $1/ [L]
# Rewrite any calls to /* or /app to the index.php file
RewriteCond %{REQUEST_URI} /app/$
RewriteRule ^app/ index.php [L]
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule ^(.*)/$ index.php?$1 [L]
# Rewrite any file calls to the public directory
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteCond %{REQUEST_URI} !public/
RewriteRule ^(.+)$ public/$1 [L]
These are the rewrite rules I'v tried to use, but it seems this gets the site into an infinite rewrite loop:
# cw.sidenote.hu -> cellwars.sidenote.hu
RewriteCond %{HTTP_HOST} ^cw.sidenote.hu$
RewriteRule ^(.*)$ http://cellwars.sidenote.hu/ [R=301,L]
# sidenote.hu/cellwars/* -> cellwars.sidenote.hu/*
RewriteCond %{REQUEST_URI} ^/cellwars/?(.*)$
RewriteRule ^(.*)$ http://cellwars.sidenote.hu/%1 [R=301,L]
This is what I got back from Chrome:
This webpage has a redirect loop
The webpage at http://cellwars.sidenote.hu/ has resulted in too many redirects. Clearing your cookies for this site or allowing third-party cookies may fix the problem. If not, it is possibly a server configuration issue and not a problem with your computer.
Here are some suggestions:
Reload this webpage later.
Learn more about this problem.
Error 310 (net::ERR_TOO_MANY_REDIRECTS): There were too many redirects.
Could anyone help me? Thanks in advance!

Answer 1

Try replacing your htaccess file content with this (I didn't change anything beyond the ErrorDocument 404 /404.html line) :
RewriteEngine on
# Some hosts require a rewritebase rule, if so, uncomment the RewriteBase line below. If you are running from a subdirectory, your rewritebase should match the name of the path to where stacey is stored.
# ie. if in a folder named 'stacey', RewriteBase /stacey
RewriteBase /
# cw.sidenote.hu -> cellwars.sidenote.hu
RewriteCond %{HTTP_HOST} ^cw\.sidenote\.hu$
RewriteRule ^(.*)$ http://cellwars.sidenote.hu/$1 [R=301,L]
# sidenote.hu/cellwars/* -> cellwars.sidenote.hu/*
RewriteCond %{HTTP_HOST} ^(www\.)?sidenote\.hu$
RewriteRule ^cellwars/?(.*)$ http://cellwars.sidenote.hu/$1 [R=301,L]
ErrorDocument 404 /404.html
# Rewrite any calls to *.html, *.json, *.xml, *.atom, *.rss, *.rdf or *.txt if a folder matching * exists
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_URI} !public/
RewriteCond %{DOCUMENT_ROOT}/public/$1.$2 !-f
RewriteRule (.+)\.(html|json|xml|atom|rss|rdf|txt)$ $1/ [L]
# Add a trailing slash to directories
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteCond %{REQUEST_URI} !(\.)
RewriteCond %{REQUEST_URI} !(.*)/$
RewriteRule ([^/]+)$ $1/ [L]
# Rewrite any calls to /* or /app to the index.php file
RewriteCond %{REQUEST_URI} /app/$
RewriteRule ^app/ index.php [L]
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule ^(.*)/$ index.php?$1 [L]
# Rewrite any file calls to the public directory
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteCond %{REQUEST_URI} !public/
RewriteRule ^(.+)$ public/$1 [L]