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apachemod-rewrite

mod_rewrite apache FQDN to Hostname

I'm trying to find a mod_rewrite code for forcing users that go to FQDN to be re-written to the hostname without the domain and don't want them to be stuck in a loop. I can only find re-write examples for the other way round. Anyone have a suggestion on how I can do this?

So example if I was to go to http://appname.example.com/test.php

The rewritten URL should be http://appname/test.php

Any suggestions would be great.

Solution

  • To "redirect" http://<appname>.example.com/<url-path> to http://<appname>/<url-path> (where <appname> and <url-path> are entirely variable and <appname> is also a resolvable hostname on the local network) then you would do something like the following using mod_rewrite at the top of the root .htaccess file:

    RewriteEngine On

RewriteCond %{HTTP_HOST} ^(?!www\.)([a-z-]+)\.example\.com [NC]
RewriteRule ^ http://%1%{REQUEST_URI} [R=302,L]

    This excludes the www subdomain using a negative lookahead.

    %1 in the substitution string is a backreference to the <appname> as captured from the requested hostname.

    %{REQUEST_URI} contains the full root-relative URL-path (starting with a slash).

    This also handles FQDN (that end in a dot).