Para produção você usaria `fastapi run` no lugar. 🚀

Internamente, **FastAPI CLI** usa <a href="https://www.uvicorn.org" class="external-link" target="_blank">Uvicorn</a>, um servidor ASGI de alta performance e pronto para produção. 😎

## `fastapi dev`

Quando você roda `fastapi dev`, isso vai executar em modo de desenvolvimento.

 *
 * Do not use these APIs in published libraries.
 *
 * Do not use these APIs if you aren't willing to track changes to them.
 */
@MustBeDocumented
@Retention(value = AnnotationRetention.BINARY)
@Target(
  AnnotationTarget.CLASS,
  AnnotationTarget.ANNOTATION_CLASS,
  AnnotationTarget.PROPERTY,
  AnnotationTarget.FIELD,
  AnnotationTarget.LOCAL_VARIABLE,
  AnnotationTarget.VALUE_PARAMETER,

# 请求表单与文件

FastAPI 支持同时使用 `File` 和 `Form` 定义文件和表单字段。

/// info | "说明"

接收上传文件或表单数据，要预先安装 <a href="https://github.com/Kludex/python-multipart" class="external-link" target="_blank">`python-multipart`</a>。

例如，`pip install python-multipart`。

///

## 导入 `File` 与 `Form`

```Python hl_lines="1"
{!../../docs_src/request_forms_and_files/tutorial001.py!}
```

## 定义 `File` 与 `Form` 参数

创建文件和表单参数的方式与 `Body` 和 `Query` 一样：

// 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 target

import (
	"sync"
	"sync/atomic"
)

// Inspired from Golang sync.Once but it is only marked
// initialized when the provided function returns nil.

type lazyInit struct {
	done uint32

		Algorithm: algorithm,
		Nonce:     nonce,
	})
	if err != nil {
		return nil, err
	}
	if len(metadata) > MaxMetadataSize {
		return nil, errors.New("config: encryption metadata is too large")
	}
	header[0] = Version
	binary.LittleEndian.PutUint32(header[1:], uint32(len(metadata)))
	buffer.Write(header[:])
	buffer.Write(metadata)

	return io.MultiReader(
		&buffer,

```Python
    uvicorn.run(app, host="0.0.0.0", port=8000)
```

não será executada.

/// info | "Informação"

Para mais informações, consulte <a href="https://docs.python.org/3/library/__main__.html" class="external-link" target="_blank">a documentação oficial do Python</a>.

///

## Execute seu código com seu depurador

   * between being a directory and being a symlink, while the given {@code target} is the target the
   * symlink should have.
   */
  @SuppressWarnings("ThreadPriorityCheck") // TODO: b/175898629 - Consider onSpinWait.
  private static void startDirectorySymlinkSwitching(
      final Path file, final Path target, ExecutorService executor) {

⏭ 📃, 👤 🔜 🤝 👆 🌅 **🧱 🍮** 🛠️ FastAPI 🈸.

✋️ 🔜, ➡️ ✅ 👉 ⚠ **⚛ 💭**. 👫 🔧 ✔ 🙆 🎏 🆎 🕸 🛠️. 👶

## 💂‍♂ - 🇺🇸🔍

[⏮️ 📃 🔃 🇺🇸🔍](https.md){.internal-link target=_blank} 👥 🇭🇲 🔃 ❔ 🇺🇸🔍 🚚 🔐 👆 🛠️.

👥 👀 👈 🇺🇸🔍 🛎 🚚 🦲 **🔢** 👆 🈸 💽, **🤝 ❎ 🗳**.

& 📤 ✔️ 🕳 🈚 **♻ 🇺🇸🔍 📄**, ⚫️ 💪 🎏 🦲 ⚖️ ⚫️ 💪 🕳 🎏.

### 🖼 🧰 🇺🇸🔍

🧰 👆 💪 ⚙️ 🤝 ❎ 🗳:

## Использование более безопасного протокола HTTPS

В [предыдущей главе об HTTPS](https.md){.internal-link target=_blank} мы рассмотрели, как HTTPS обеспечивает шифрование для вашего API.

Также мы заметили, что обычно для работы с HTTPS вашему приложению нужен **дополнительный** компонент - **прокси-сервер завершения работы TLS**.

	_         int32 // For 64 bits alignment
	lastConn  int64

	// HealthCheckFn is the function set to test for health.
	// If not set the client will not keep track of health.
	// Calling this returns true or false if the target
	// is online or offline.
	HealthCheckFn func() bool

	// HealthCheckRetryUnit will be used to calculate the exponential
	// backoff when trying to reconnect to an offline node
	HealthCheckReconnectUnit time.Duration