С **FastAPI** вы объявляете параметры с подсказками типов и получаете:

* **Поддержку редактора кода**.
* **Проверки типов**.

...и **FastAPI** использует эти же объявления для:

* **Определения требований**: из path-параметров пути запроса, query-параметров, HTTP-заголовков, тел запросов, зависимостей и т.д.
* **Преобразования данных**: из HTTP-запроса к требуемому типу.
* **Валидации данных**: приходящих с каждого HTTP-запроса:

/// tip | 팁

여기서 표준 `open()`을 사용하고 있기 때문에 `async`와 `await`를 지원하지 않습니다. 따라서 경로 작업은 일반 `def`로 선언합니다.

///

### `FileResponse`

파일을 비동기로 스트리밍하여 응답합니다.

다른 응답 유형과는 다른 인수를 사용하여 객체를 생성합니다:

* `path` - 스트리밍할 파일의 경로.
* `headers` - 딕셔너리 형식의 사용자 정의 헤더.
* `media_type` - 미디어 타입을 나타내는 문자열. 설정되지 않은 경우 파일 이름이나 경로를 사용하여 추론합니다.
* `filename` - 설정된 경우 응답의 `Content-Disposition`에 포함됩니다.

And still, you would probably not want the application to stay dead because there was an error in one place, you probably want it to **continue running** at least for the *path operations* that are not broken.

### Restart After Crash { #restart-after-crash }

// Create adds a file to the zip file using the provided name.
// It returns a [Writer] to which the file contents should be written.
// The file contents will be compressed using the [Deflate] method.
// The name must be a relative path: it must not start with a drive
// letter (e.g. C:) or leading slash, and only forward slashes are
// allowed. To create a directory instead of a file, add a trailing

	}
	last := &r.buf[len(r.buf)-1]
	return last.off + last.n
}

func (r *rleBuffer) Write(p []byte) (n int, err error) {
	var rp *repeatedByte
	if len(r.buf) > 0 {
		rp = &r.buf[len(r.buf)-1]
		// Fast path, if p is entirely the same byte repeated.
		if lastByte := rp.b; len(p) > 0 && p[0] == lastByte {
			if bytes.Count(p, []byte{lastByte}) == len(p) {
				rp.n += int64(len(p))
				return len(p), nil
			}
		}
	}

func newPeerRESTClient(peer *xnet.Host, gridHost string) *peerRESTClient {
	scheme := "http"
	if globalIsTLS {
		scheme = "https"
	}

	serverURL := &url.URL{
		Scheme: scheme,
		Host:   peer.String(),
		Path:   peerRESTPath,
	}

	restClient := rest.NewClient(serverURL, globalInternodeTransport, newCachedAuthToken())
	// Use a separate client to avoid recursive calls.

Y aún así, probablemente no querrías que la aplicación quede muerta porque hubo un error en un lugar, probablemente querrás que **siga ejecutándose** al menos para las *path operations* que no estén rotas.

### Reiniciar Después del Colapso { #restart-after-crash }

		Description:    "Illegal argument was used in the SQL function.",
		HTTPStatusCode: http.StatusBadRequest,
	},
	ErrInvalidKeyPath: {
		Code:           "InvalidKeyPath",
		Description:    "Key path in the SQL expression is invalid.",
		HTTPStatusCode: http.StatusBadRequest,
	},
	ErrInvalidCompressionFormat: {
		Code:           "InvalidCompressionFormat",

* Do not finish the title with a period (`.`).
* When the PR is for a translation, start with the `🌐` and then `Add {language} translation for` and then the translated file path. For example:

```Markdown
🌐 Add Spanish translation for `docs/es/docs/teleporting.md`
```

执行顺序大致如下时序图所示。时间轴从上到下，每一列都代表交互或者代码执行的一部分。

```mermaid
sequenceDiagram

participant client as Client
participant handler as Exception handler
participant dep as Dep with yield
participant operation as Path Operation
participant tasks as Background tasks

    Note over client,operation: Can raise exceptions, including HTTPException
    client ->> dep: Start request
    Note over dep: Run code up to yield