Hey everyone,

I’m working on a multi-tenant eCommerce platform (nabisalay.com) where users can create their own stores.

How It Works By Default

• Users get a store handle like: nabisalay.com/@storehandle

• I want to let them connect their own custom domains (e.g., mystore.com).

What I’ve Implemented So Far

Middleware for Domain Mapping

I’ve added a middleware that checks the requested domain and maps it to the associated store:

public function handle(Request $request, Closure $next): Response
{
    $domain = $request->getHost(); // Get the current domain

    // Check if the domain exists in user settings
    $userSetting = UserSetting::where('custom_domain', $domain)->first();

    if ($userSetting) {
        // Get the associated username
        $username = $userSetting->user->username;
        
        // Merge the username into the request
        $request->merge(['username' => $username]);
    }

    return $next($request);
}

DNS Records I’ve Set Up

I added the following DNS records:

CNAME	www	0	nabisalay.com	300
A	@	0	89.117.27.88	300
CAA	@	0	0 issuewild "letsencrypt.org"	14400
CAA	@	0	0 issue "letsencrypt.org"	14400
CAA	@	0	0 issuewild "pki.goog"	14400
CAA	@	0	0 issue "pki.goog"	14400
CAA	@	0	0 issuewild "digicert.com"	14400
CAA	@	0	0 issue "digicert.com"	14400
CAA	@	0	0 issuewild "sectigo.com"	14400
CAA	@	0	0 issue "sectigo.com"	14400
CAA	@	0	0 issuewild "globalsign.com"	14400
CAA	@	0	0 issue "globalsign.com"	14400
CAA	@	0	0 issuewild "comodoca.com"	14400
CAA	@	0	0 issue "comodoca.com"	14400

.htaccess Configuration (Apache, Shared Hosting)

I’m on shared hosting using Apache, and this is my .htaccess file:

<IfModule mod_rewrite.c>
    <IfModule mod_negotiation.c>
        Options -MultiViews -Indexes
    </IfModule>

    RewriteEngine On

    # Redirect www to non-www
    RewriteCond %{HTTP_HOST} ^www\.(.+)$ [NC]
    RewriteRule ^ http://%1%{REQUEST_URI} [L,R=301]

    # Redirect HTTP to HTTPS
    RewriteCond %{HTTPS} off
    RewriteRule ^ https://%{HTTP_HOST}%{REQUEST_URI} [L,R=301]

    # Handle Authorization Header
    RewriteCond %{HTTP:Authorization} .
    RewriteRule .* - [E=HTTP_AUTHORIZATION:%{HTTP:Authorization}]

    # Redirect Trailing Slashes If Not A Folder...
    RewriteCond %{REQUEST_FILENAME} !-d
    RewriteCond %{REQUEST_URI} (.+)/$
    RewriteRule ^ %1 [L,R=301]

    # Send Requests To Front Controller...
    RewriteCond %{REQUEST_FILENAME} !-d
    RewriteCond %{REQUEST_FILENAME} !-f
    RewriteRule ^ index.php [L]
</IfModule>

The Issue

• I successfully connected a custom domain (nabisalay.shop) to Shopify, but it doesn’t work with nabisalay.com.
• When visiting nabisalay.shop it show this error nabisalay.shop sent an invalid response.

Questions I Need Help With

• What might be causing the domain to work with Shopify but not with my platform?

Would love any insights or recommendations! 🚀