# Advanced Middleware { #advanced-middleware }

In the main tutorial you read how to add [Custom Middleware](../tutorial/middleware.md){.internal-link target=_blank} to your application.

And then you also read how to handle [CORS with the `CORSMiddleware`](../tutorial/cors.md){.internal-link target=_blank}.

In this section we'll see how to use other middlewares.

## Adding ASGI middlewares { #adding-asgi-middlewares }

Так как операция записи не использует `async` и `await`, мы определим функцию как обычную `def`:

{* ../../docs_src/background_tasks/tutorial001_py39.py hl[6:9] *}

## Добавление фоновой задачи { #add-the-background-task }

Внутри вашей функции‑обработчика пути передайте функцию задачи объекту фоновых задач методом `.add_task()`:

{* ../../docs_src/background_tasks/tutorial001_py39.py hl[14] *}

	}
}

func TestDynamicTimeoutConcurrent(t *testing.T) {
	// Race test.
	timeout := newDynamicTimeout(time.Second, time.Millisecond)
	var wg sync.WaitGroup
	for i := 0; i < runtime.GOMAXPROCS(0); i++ {
		wg.Add(1)
		rng := rand.New(rand.NewSource(int64(i)))
		go func() {
			defer wg.Done()
			for range 100 {
				for range 100 {
					timeout.LogSuccess(time.Duration(float64(time.Second) * rng.Float64()))
				}

Transition tiers can be added to MinIO using `mc admin tier add` command to associate a `gcs`, `s3` or `azure` bucket or prefix path on a bucket to the tier name.

	case timePartMinute:
		duration = time.Duration(qty) * time.Minute
	case timePartSecond:
		duration = time.Duration(qty) * time.Second
	default:
		return nil, errNotImplemented
	}
	return FromTimestamp(t.Add(duration)), nil
}

// dateDiff computes the difference between two times in terms of the
// `timePart` which can be years, months, days, hours, minutes or
// seconds. For difference in years, months or days, the time part,

## Use `CORSMiddleware` { #use-corsmiddleware }

You can configure it in your **FastAPI** application using the `CORSMiddleware`.

* Import `CORSMiddleware`.
* Create a list of allowed origins (as strings).
* Add it as a "middleware" to your **FastAPI** application.

You can also specify whether your backend allows:

* Credentials (Authorization headers, Cookies, etc).

            return directField;
        }

        public List<String> getItems() {
            return items;
        }

        public void addItem(String item) {
            this.items.add(item);
        }
    }

	Expiration          Expiration          `xml:"Expiration,omitempty"`
	Transition          Transition          `xml:"Transition,omitempty"`
	DelMarkerExpiration DelMarkerExpiration `xml:"DelMarkerExpiration,omitempty"`
	// FIXME: add a type to catch unsupported AbortIncompleteMultipartUpload AbortIncompleteMultipartUpload `xml:"AbortIncompleteMultipartUpload,omitempty"`
	NoncurrentVersionExpiration NoncurrentVersionExpiration `xml:"NoncurrentVersionExpiration,omitempty"`

		return
	}

	writeSuccessResponseJSON(w, encryptedData)
}

// AddServiceAccountLDAP adds a new service account for provided LDAP username or DN
//
// PUT /minio/admin/v3/idp/ldap/add-service-account
func (a adminAPIHandlers) AddServiceAccountLDAP(w http.ResponseWriter, r *http.Request) {
	ctx, cred, opts, createReq, targetUser, APIError := commonAddServiceAccount(r, true)
	if APIError.Code != "" {

pkg crypto/elliptic, method (*CurveParams) Add //deprecated #34648
pkg crypto/elliptic, method (*CurveParams) Double //deprecated #34648
pkg crypto/elliptic, method (*CurveParams) IsOnCurve //deprecated #34648
pkg crypto/elliptic, method (*CurveParams) ScalarBaseMult //deprecated #34648
pkg crypto/elliptic, method (*CurveParams) ScalarMult //deprecated #34648
pkg crypto/elliptic, type Curve interface, Add //deprecated #52221