Apache Redirect Wildcard sub- subdomain to subdomain
The solution for the redirect is:
<Virtualhost {{IP-ADRR}}:80> ServerName %1.domain.com RewriteEngine On RewriteCond %{HTTPS} off [OR] RewriteCond %{HTTP_HOST} ^www\. [NC] RewriteCond %{HTTP_HOST} ^(?:www\.)?(.+)$ [NC] RewriteRule ^ https://%1%{REQUEST_URI} [L,NE,R=301]</VirtualHost>Explanation:
RewriteCond %{HTTPS} off [OR]RewriteCond %{HTTP_HOST} !^www\. [NC]These two lines are are the redirect conditions, they are used to determine if the request should be redirected. Because the conditions are joined with an [OR], if any of those two conditions returns true, Apache will execute the rewrite rule (the redirect).
The first condition determines if the request is using a non-HTTPS URL. The second condition determines if the request is using the www URL. Notice that I used www\. and not www., because the pattern is a regular expression and the . dot has a special meaning here, hence it must be escaped.
RewriteCond %{HTTP_HOST} ^(?:www\.)?(.+)$ [NC]The forth line is a convenient line I used to avoid referending the hostname directly in the URL. It matches the HOST of the incoming request, and decomposes it into www part (if any), and rest of the hostname. We'll reference it later with %1 in the RewriteRule.
RewriteRule ^ https://www.%1%{REQUEST_URI} [L,NE,R=301]The RewriteRule is the heart of the redirect. With this line we tell Apache to redirect any request to a new URL, composed by:
- https://www.
- %1: the reference to the non-www part of the host
- %{REQUEST_URI}: the URI of the request, without the hostname
All these tokens are joined together, and represents the final redirect URI. Finally, we append 3 flags:
- NE to not escape special characters
- R=301 to use the HTTP 301 redirect status
- L to stop processing other rules, and redirect immediately