mod_rewrite is ignoring rules in subdirectories - apache

Question

Wanted rewrite behaviour (internal rewrite!)
http://<subdomain>.domain.tld/<path> -> /<subdomain>/<path>
http://www.domain.tld/path/file.php -> /www/path/file.php
http://project.domain-tld/index.php -> /project/index.php
Folder structure:
/ root
.htaccess
/www www.domain.tld
index.php
/www
file.php
/foo
/bar
file.php
/project project.domain.tld
index.php
someRandomFiles
/somesubdomain somesubdomain.domain.tld
index.php
someRandomFiles
/anothersubdomain anothersubdomain.domain.tld
index.php
someRandomFiles
Full .htaccess
# Unicode
AddDefaultCharset utf-8
# Activate mod_rewrite
RewriteEngine on
RewriteBase /
# Subdomains
# Extract (required) subdomain (%1), and first path element (%3), discard port number if present (%2)
RewriteCond %{HTTP_HOST}<>%{REQUEST_URI} ^([^.]+)\.janbuschtoens\.de(:80)?<>/([^/]*) [NC]
# Rewrite only when subdomain not equal to first path element (prevents mod_rewrite recursion)
RewriteCond %1<>%3 !^(.*)<>\1$ [NC]
# Rewrite to /subdomain/path
RewriteRule ^(.*) /%1/$1 [L]
My .htaccess seems to work. You can live test it here:
http://test.janbuschtoens.de/
rewrites to /test/
http://www.janbuschtoens.de/
rewrites to /www/
But there is some strange behaviour in subdirectories. mod_rewrite seems to ignore the rule if the first directory in the requested path has the same name as the subdomain itself. For example:
http://www.domain.tld/foo/bar/file.php -> /www/foo/bar/file.php - Fine!
http://www.domain.tld/ -> /www/ - Fine!
http://www.domain.tld/www/ -> /www/ - Should be: /www/www/
http://www.domain.tld/www/www/ -> /www/www/ - Should be: /www/www/www/
For another live test:
http://test.janbuschtoens.de/ rewrites to /test/
http://test.janbuschtoens.de/test/ rewrites to /test/
It seems like the rule gets ignored.

Answer 1

This is the only good rule that I was able come up with, otherwise after initial rewriting (which is very easy) it goes into the loop (and that is the problem). For example: www.domain.com/www/123.png gets properly redirected into /www/www/123.png, but then goes to the next loop, where it get's redirected to /www/www/www/123.png and then again and again.
This rule ONLY gets invoked if FINAL filename DOES EXIST.
RewriteCond %{HTTP_HOST} ^(.+)\.domain\.com$
RewriteCond %{DOCUMENT_ROOT}/%1/$1 -f [OR]
RewriteCond %{DOCUMENT_ROOT}/%1/$1 -d
RewriteRule ^(.*)$ /%1/$1 [QSA,L]
For example: if you request www.domain.com/www/123.png, and file/folder WEBSITEROOT/www/www/123.png exist, then it will be rewritten, otherwise nothing.
The same here: if you request meow.domain.com/ .. but have no WEBSITEROOT/meow/ folder on your drive, it gets nowhere.
Please note, this still will not help much if you have subfolder with the same name as subdomain. For example: if you request www.domain.com it should be rewritten to WEBSITEROOT/www/ ... but if you also have WEBSITEROOT/www/www/ then (because of loop) it will be rewritten to WEBSITEROOT/www/www/ instead.
Unfortunately I have not found the way how to bypass it. If you wish -- you can try combining your rules with mine.