When you install FastAPI with `pip install "fastapi[standard]"` it comes with the `standard` group of optional dependencies:

Used by Pydantic:

* <a href="https://github.com/JoshData/python-email-validator" target="_blank"><code>email-validator</code></a> - for email validation.

Used by Starlette:

* <a href="https://www.python-httpx.org" target="_blank"><code>httpx</code></a> - Required if you want to use the `TestClient`.

| `license_info` | `dict` | The license information for the exposed API. It can contain several fields. <details><summary><code>license_info</code> fields</summary><table><thead><tr><th>Parameter</th><th>Type</th><...

Esto incluye, por ejemplo:

* Notificaciones por email enviadas después de realizar una acción:
  * Como conectarse a un servidor de email y enviar un email tiende a ser "lento" (varios segundos), puedes devolver el response de inmediato y enviar la notificación por email en segundo plano.
* Procesamiento de datos:

Und dann schreibt ein weiterer Hintergrundtask, der in der *Pfadoperation-Funktion* erstellt wird, eine Nachricht unter Verwendung des Pfad-Parameters `email`.

## Technische Details { #technical-details }

Die Klasse `BackgroundTasks` stammt direkt von <a href="https://www.starlette.dev/background/" class="external-link" target="_blank">`starlette.background`</a>.

	// MetaMultipart indicates that the object has been uploaded
	// in multiple parts - via the S3 multipart API.
	MetaMultipart = "X-Minio-Internal-Encrypted-Multipart"

	// MetaIV is the random initialization vector (IV) used for
	// the MinIO-internal key derivation.
	MetaIV = "X-Minio-Internal-Server-Side-Encryption-Iv"

	// MetaAlgorithm is the algorithm used to derive internal keys
	// and encrypt the objects.

Если в запросе была строка запроса (query), она будет записана в лог фоновой задачей.

Затем другая фоновая задача, созданная в функции‑обработчике пути, запишет сообщение, используя path‑параметр `email`.

## Технические детали { #technical-details }

Класс `BackgroundTasks` приходит напрямую из <a href="https://www.starlette.dev/background/" class="external-link" target="_blank">`starlette.background`</a>.

	{
		ExpectedErr: Errorf("The object metadata is missing the internal sealed key for SSE-C"),
		Metadata:    map[string]string{MetaIV: "", MetaAlgorithm: ""}, SealedKey: SealedKey{},
	}, // 2
	{
		ExpectedErr: errInvalidInternalIV,
		Metadata:    map[string]string{MetaIV: "", MetaAlgorithm: "", MetaSealedKeySSEC: ""}, SealedKey: SealedKey{},

| `license_info` | `dict` | 公开的 API 的许可证信息。它可以包含多个字段。<details><summary><code>license_info</code> 字段</summary><table><thead><tr><th>参数</th><th>类型</th><th>描述</th></tr></thead><tbody><tr><td><code>name</code></td><td><code>str</code></td><td><strong>必须的</strong> (如果设置了<code>license_info</code>). 用于 API 的许可证名称。</td></tr><tr><td><code>identifier</code></td><td><code>str</code></td><td>一个API的<a href="https://spdx.org/licenses/" class="external-link" target="_blank">SPDX</a>许可证表达。 The...

// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with this program.  If not, see <http://www.gnu.org/licenses/>.

package http

// Object Lambda headers
const (

| `license_info` | `dict` | As informações de licença para a API exposta. Ela pode conter vários campos. <details><summary>Campos de <code>license_info</code></summary><table><thead><tr><th>Parâmetro</th><th>Tip...