Need help with Apache's mod_rewrite to fetch file based on url

So say I have a url being requested:

sub.domain/file.bin

and I wanted this file to be fetched:

domain/hosted/sub/file.bin

How would I structure the rewrite directives? I've been working on this for days, and it just gives me a headache...

The subdomains are numerous and are added and removed often, so I'm trying to find a solution that works for all of them.

From stackoverflow

• In sub.domain's httpd config:

  RewriteCond %{HTTP_HOST} ([^\.]+).domain
  RewriteRule ^/file.bin$ http://domain/hosted/%1/file.bin
  

  Cypher : Hrm, getting close. How could I make the "sub" dynamic based on whatever the subdomain is in the initial url?

• Assuming the home directory for www.domain.com is domain/ and that - given any subdomain sub.domain.com - you want the files for the home directories for that sub-domain to be in domain/hosted/sub/

  Try something like this:

  RewriteEngine on
  
  // If the host is just mydomain.com, do nothing more
  // this is to prevent some recursion problems I've read of...
  RewriteCond %{HTTP_HOST} ^(www\.)?mydomain\.com$ [NC]
  RewriteRule ^.*$ - [L]
  
  // Otherwise strip off everything before mydomain
  // And add it to the start of the request
  RewriteCond %{HTTP_HOST} ^(.*?)\.(www\.)?mydomain\.com$ [NC]
  RewriteRule ^.*$ %1%{REQUEST_URI} [QSA]
  
  // Then prefix with 'hosted'
  RewriteRule ^(.*)$ hosted/$1 [QSA,L]
  

  You may also need a wildcard entry in your DNS or something... but I will admit DNS and htaccess mod rewrite are some of my weaker points. See also http://www.webmasterworld.com/forum92/138.htm

• Try this rule:

  RewriteCond %{HTTP_HOST} ^([^/.]+)\.example\.com$
  RewriteCond %1 !=www
  RewriteRule !^hosted/ hosted/%1%{REQUEST_URI} [L]