Point External Domain and Sub Directories to Site's Folder - linux

Question

A lot of pages in our site uses an old subdomain for images, css and javascript files. I inherited the project from newbie developers and they didn't use any common design template. The result are hundreds of pages with static references to contents an examples are:
http://static.foo.bar/css/sample.css
http://static.foo.bar/brochure/css/sample.css
http://static.foo.bar/company/newsletter/js/common.js
http://static.foo.bar/images/version2/header.jpg
...and hundreds of other locations. I need to point them all to the main domain instead of the subdomain without creating rules for each of these on the .htaccess file. So:
http://static.foo.bar/css/sample.css
should point to:
http://www.foo.bar/css/sample.css
http://static.foo.bar/brochure/css/sample.css
should point to:
http://www.foo.bar/brochure/css/sample.css
http://static.foo.bar/company/newsletter/js/common.js
should point to:
http://www.foo.bar/company/newsletter/js/common.js
http://static.foo.bar/images/version2/header.jpg
should point to:
http://www.foo.bar/images/version2/header.jpg
I know this is possible only I'm not a server guy. Any help would be very much appreciated.

Answer 1

Create an .htaccess file in the document root with this content:
Add this to your server configuration, %{HTTP_HOST} check does not work from .htaccess:
<IfModule mod_rewrite.c>
# bad matching: RewriteCond %{HTTP_HOST} !^static\.foo\.bar [NC]
#
# correction, matching everything other than www.foo.bar :
RewriteCond %{HTTP_HOST} !^www\.foo\.bar$ [NC]
RewriteCond %{HTTP_HOST} !^$
RewriteRule ^/(.*) http://www.foo.bar/$1 [L,R]
</IfModule>
See http://httpd.apache.org/docs/2.0/misc/rewriteguide.html#url
UPDATE:
Giving it a second though, if it's hosted on the same server, just add
ServerAlias static.foo.bar
to the www.foo.bar configuration to serve up the static content, too.
UPDATE #2 based on feedback:
This should work (works on my pc) in the .htaccess file, this redirects all requests coming to static.foo.bar/* to www.foo.bar/* :
RewriteCond %{HTTP_HOST} ^static\.foo\.bar [NC]
RewriteRule ^(.*)$ http://www.foo.bar/$1 [R,L]
And no, the ServerAlias command only works from a VirtualHost configuration:
http://httpd.apache.org/docs/2.2/mod/core.html#serveralias