Lae/app/Http/Middleware/AddHeaders.php

<?php

namespace App\Http\Middleware;

use App\Support\ClusterSupport;
use Closure;
use Illuminate\Http\Request;

class AddHeaders
{
    /**
     * Handle an incoming request.
     */
    public function handle(Request $request, Closure $next): mixed
    {
        $response = $next($request);

        // SSE, 检测有没有 header() 方法。
        if (method_exists($response, 'header')) {
            $response->header('Node-Id', ClusterSupport::currentNode()['id']);
        }

        return $response;
    }
}