trip-planner/backend/app/Infrastructure/Http/Middleware/Cors.php

<?php

namespace App\Infrastructure\Http\Middleware;

use Closure;
use Illuminate\Http\Request;
use Symfony\Component\HttpFoundation\Response;

class Cors
{
    /**
     * Handle an incoming request.
     *
     * @param  \Closure(\Illuminate\Http\Request): (\Symfony\Component\HttpFoundation\Response)  $next
     */
    public function handle(Request $request, Closure $next): Response
    {
        $response = $next($request);

        $origin = $request->headers->get('Origin');
        $allowedOrigin = env('FRONTEND_URL', 'http://localhost:5173');

        // Only set CORS headers if the origin matches our frontend
        if ($origin === $allowedOrigin) {
            $response->headers->set('Access-Control-Allow-Origin', $origin);
            $response->headers->set('Access-Control-Allow-Methods', 'GET, POST, PUT, DELETE, OPTIONS');
            $response->headers->set('Access-Control-Allow-Headers', 'Content-Type, Authorization, X-Requested-With, Accept, X-XSRF-TOKEN');
            $response->headers->set('Access-Control-Allow-Credentials', 'true');
        }

        // Handle preflight OPTIONS requests
        if ($request->getMethod() === 'OPTIONS') {
            $response->setStatusCode(200);
        }

        return $response;
    }
}