How to restrict access the app through the subdomain? - apache

Question

I'm binding the app with domain first time and I have bound my app with the domain and it has an A Name.
www.domain.de
I have also two subdomains.
api.domain.de
admin.domain.de
Now I have one static app and it must be accessed through only the main domain, not by subdomains.
What I Tried
RewriteEngine On
RewriteCond %{HTTP_HOST} ={api.domain.de}[NC]
RewriteCond %{QUERY_STRING} ^({folderName})
RewriteRule ^$ http://{domain}.de//?%1 [R=301,L]
Can anyone help to achieve this?

Answer 1

This probably is a straight forward approach...
It implements an external redirection of all requests to any hostname that differs from "www.example.com" while keeping the requested path and query string.
RewriteEngine On
RewriteCond %{HTTP_HOST} !^www\.example\.com$
RewriteRule ^/?(.*)$ https://example.com/$1 [QSA,R=301]
I would, however, expect that there are certain requests you do not want to redirect. Both hostnames you mentioned in your question indicate that they are meant to be used for specific purposes. So most likely those requests should not get redirected?
This can be implemented using an additional internal rewriting that takes care of such requests before the more general redirection gets applied:
RewriteEngine On
RewriteCond %{HTTP_HOST} ^admin\.example\.com$
RewriteCond %{REQUEST_URI} !^/admin/
RewriteRule ^/?(.*)$ /admin/$1 [END]
RewriteCond %{HTTP_HOST} !^www\.example\.com$
RewriteRule ^/?(.*)$ https://example.com/$1 [QSA,R=301]
These are just examples obviously, you will need to adapt them to fit your specific needs. Your question is vague here, so that is the best we can offer...
Update
<IfModule mod_rewrite.c>
RewriteEngine On
RewriteCond %{HTTP_HOST} ^api.domain.de$ [OR]
RewriteCond %{HTTP_HOST} ^admin.domain.de$
RewriteRule (.*)$ http://domain.de/projectName/$1 [R=301,L]
</IfModule>
This works for me... :)