laravel_sketch/app/Http/Controllers/Controller.php

<?php

namespace App\Http\Controllers;

use Illuminate\Foundation\Auth\Access\AuthorizesRequests;
use Illuminate\Foundation\Bus\DispatchesJobs;
use Illuminate\Foundation\Validation\ValidatesRequests;
use Illuminate\Routing\Controller as BaseController;

class Controller extends BaseController
{
    use AuthorizesRequests, DispatchesJobs, ValidatesRequests;

    public function ping()
    {
        return "pong";
    }

    public function upload()
    {
        $file = request()->file("file");
        $category = request()->input("category", "default");
        $path = $file->store("public/{$category}");
        return [
            "code" => 200,
            "data" => [
                "upload_url" => config("app.url") . str_replace("public", "/storage", $path),
            ],
        ];
    }
}