Apache rewrite based on subdomain

Question

Im trying to redirect requests for a wildcard domain to a sub-directory.
ie. something.blah.domain.com --> blah.domain.com/something

I dont know how to get the subdomain name to use in the rewrite rule.

Final Solution:

RewriteCond %{HTTP_HOST} !^blah\.domain\.com
RewriteCond %{HTTP_HOST} ^([^.]+)
RewriteRule ^(.*) /%1/$1 [L]

Or as pointed out by pilif

RewriteCond %{HTTP_HOST} ^([^.]+)\.media\.xnet\.tk$

Answer 1

You should have a look at the URL Rewriting Guide from the apache documentation.

The following is untested, but it should to the trick:

RewriteCond %{HTTP_HOST} ^([^.]+)\.blah\.domain\.com$
RewriteRule ^/(.*)$           http://blah.domain.com/%1/$1 [L,R]

This only works if the subdomain contain no dots. Otherwise, you'd have to alter the Regexp in RewriteCond to match any character which should still work due to the anchoring, but this certainly feels saver.

Answer 2

Try this:

RewriteCond %{HTTP_HOST} (.+)\.blah\.domain\.com
RewriteRule ^(.+)$ /%1/$1 [L]

@pilif (see comment): Okay, that's true. I just copied a .htaccess that I use on one of my projects. Guess it has a slightly different approach :)

Answer 3

Thanks, but i cant get it to work. here is what i have so far:

<VirtualHost *:80>
    ServerName media.xnet.tk
    ServerAlias *.media.xnet.tk
    DocumentRoot /var/www/media

    RewriteEngine On
    RewriteLog "/var/log/apache2/rewrite.log"
    RewriteLogLevel 4
    RewriteCond ${HTTP_HOST} ^([^\.]+)\.media\.xnet\.tk$
    RewriteRule ^(.*)$ /%1/$1 [L]
</VirtualHost>

From Log: RewriteCond: input='${HTTP_HOST}' pattern='^([^\.]+)\.media\.xnet\.tk$' => not-matched

Answer 4

@Sam

your RewriteCond line is wrong. The expansion of the variable is triggered with %, not $.

RewriteCond %{HTTP_HOST} ^([^\.]+)\.media\.xnet\.tk$
            ^

that should do the trick