Apache AliasMatch with Multiple Subdomains

Question

I have the following virtual hosts:

<VirtualHost *:443> ServerName article.example.com AliasMatch "^/(.*)" "/var/www/html/article.php" </VirtualHost> <VirtualHost *:443> ServerName company.example.com AliasMatch "^/(.*)" "/var/www/html/company.php" </VirtualHost> 

I would like to put everything under one virtual host like so:

 <VirtualHost *:443> ServerName example.com ServerAlias *.example.* AliasMatch "^(article|company)\.example\.*/(.*)" "/var/www/html/$1.php" </VirtualHost> 

Is this possible? Do I have to use mod rewrite? I want map certain subdomains to related files on my server without changing the url. I want article.example.com/test-article to map to article.php.

Answer 1

AliasMatch "^(article|company)\.example\.*/(.*)" "/var/www/html/$1.php" 

The AliasMatch directive matches against the requested URL-path (as you are doing in the first example), not the hostname (as you are trying to do here), so something like this will not match.

The obvious choice would be mod_rewrite, as you suggest. For example:

RewriteEngine On RewriteCond %{HTTP_HOST} ^(article|company)\. RewriteRule ^ /var/www/html/%1.php [L] 

Where the %1 backreference contains the match from the captured subpattern in the preceding CondPattern.

If /var/www/html is the document root, then that can be omitted from the substitution string, rewriting to a document root-relative URL-path instead of an absolute file-path. ie. simply /%1.php.

You could make it more generic and rewrite the request for any subdomain where that subdomain exists as a .php file in the document root. For example:

RewriteCond %{HTTP_HOST} ^([^.]+)\.example RewriteCond %{DOCUMENT_ROOT}/%1.php -f RewriteRule ^ /%1.php [L]