阿里云 OSS 直传签名计算
composer require chareice/laravel-oss-directly-upload
php artisan vendor:publish --provider="Chareice\\OssDirectlyUpload\\OssDirectlyUploadServiceProvider" --tag=config
$service = app(OssClient::class);
/** @var \Chareice\OssDirectlyUpload\SignData $signResult */
$signResult = $service->sign("user/dir1")