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Dynamic DocumentRoot for Sub-Domains with RewriteEngine

 
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Author Message
James Blond
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Joined: 19 Jan 2006
Posts: 6255
Location: Germany, Next to Hamburg

PostPosted: Tue 08 Jul '08 12:13    Post subject: Dynamic DocumentRoot for Sub-Domains with RewriteEngine Reply with quote

Dynamic DocumentRoot for Sub-Domains with RewriteEngine/RewriteCond/RewriteRule

If you have plenty of sub-domains and every subdomain routes in another directory on the server, it's annoying to add every subdomain to the apache.conf (httpd.conf) file.

This can be done dynamically.

Code:

DocumentRoot c:/webhosts/

[...]

<VirtualHost *>
ServerAlias www.yourdomain.com
ServerName www.yourdomain.com
RewriteEngine  on
RewriteCond    %{HTTP_HOST}  ^yourdomain.com
RewriteRule    ^(.*)$        /www/$1 [L]
RewriteCond    %{HTTP_HOST}  ^www.*
RewriteRule    ^(.*)$        /www/$1 [L]
RewriteCond    %{HTTP_HOST}  ^(.*)\.yourdomain\.com
RewriteRule    ^(.*)$        /%1/$1 [L]
</VirtualHost>


As you can see, the DocumentRoot is c:/webhosts/. This is the directory where all other sub-directories for the sub-domains are located.

We use the RewriteEngine to decide which directory we want. The first RewriteCond is to route the domain without any sub-domain into the www directory. The second RewriteCond demonstrates how the third RewriteCond works with any subdomain.

Code:

www.yourdomain.com  =>  c:/webhosts/www/
muon.yourdomain.com  =>  c:/webhosts/muon/
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