/// info

In this example we use invented custom headers `X-Key` and `X-Token`.

But in real cases, when implementing security, you would get more benefits from using the integrated [Security utilities (the next chapter)](../security/index.md){.internal-link target=_blank}.

///

## Dependencies errors and return values { #dependencies-errors-and-return-values }

You can use the same dependency *functions* you use normally.

![Swagger UI interaction](https://fastapi.tiangolo.com/img/index/index-03-swagger-02.png)

* <a href="https://github.com/Rebilly/ReDoc" class="external-link" target="_blank"><strong>ReDoc</strong></a>を使用したもう一つのAPIドキュメント生成。

![ReDoc](https://fastapi.tiangolo.com/img/index/index-06-redoc-02.png)

### 現代的なPython

  display: block;
  position: absolute;
  top: -10px;
  right: 0;
  font-size: 0.5rem;
  color: #e6e6e6;
  background-color: #666;
  border-radius: 10px;
  padding: 0 10px;
  z-index: 10;
}

.announce-wrapper .sponsor-image {
  display: block;
  border-radius: 20px;
}

.announce-wrapper>div {
  min-height: 40px;
  display: flex;
  align-items: center;
}

	Object      string        `json:"object"`
	Elapsed     time.Duration `json:"elapsed"`
	ETA         time.Duration `json:"eta"`
}

type rebalancePoolStatus struct {
	ID       int               `json:"id"`       // Pool index (zero-based)
	Status   string            `json:"status"`   // Active if rebalance is running, empty otherwise
	Used     float64           `json:"used"`     // Percentage used space

///

**FastAPI** est basé entièrement sur **Pydantic**.

Vous verrez bien plus d'exemples de son utilisation dans [Tutoriel - Guide utilisateur](tutorial/index.md){.internal-link target=_blank}.

## Les annotations de type dans **FastAPI**

**FastAPI** utilise ces annotations pour faire différentes choses.

	ErasureBlockSize   int64             `json:"EcBSize" msg:"EcBSize"`                          // Erasure block size
	ErasureIndex       int               `json:"EcIndex" msg:"EcIndex"`                          // Erasure disk index
	ErasureDist        []uint8           `json:"EcDist" msg:"EcDist"`                            // Erasure distribution
	BitrotChecksumAlgo ChecksumAlgo      `json:"CSumAlgo" msg:"CSumAlgo"`                        // Bitrot checksum algo

///

## Сценарии использования { #use-cases }

Некоторые сценарии:

* Преобразование тел запросов, не в формате JSON, в JSON (например, <a href="https://msgpack.org/index.html" class="external-link" target="_blank">`msgpack`</a>).
* Распаковка тел запросов, сжатых с помощью gzip.
* Автоматическое логирование всех тел запросов.

	if v.Kind() == reflect.Ptr {
		v = v.Elem()
	}

	switch v.Kind() {
	case reflect.Slice, reflect.Array:
		loaded = true
		for i := 0; i < v.Len(); i++ {
			if !loadOrStoreVisitMap(visitMap, v.Index(i)) {
				loaded = false
			}
		}
	case reflect.Struct, reflect.Interface:
		if v.CanAddr() {
			p := v.Addr()
			if _, ok := (*visitMap)[p]; ok {
				return true
			}
			(*visitMap)[p] = true

## Explore Further

- [MinIO STS Quickstart Guide](https://docs.min.io/community/minio-object-store/developers/security-token-service.html)

		a.Reg += ((reg & loong64.EXT_REG_MASK) << loong64.EXT_REG_SHIFT)
		a.Reg += ((arng_type & loong64.EXT_TYPE_MASK) << loong64.EXT_TYPE_SHIFT)
		a.Reg += ((simd_type & loong64.EXT_SIMDTYPE_MASK) << loong64.EXT_SIMDTYPE_SHIFT)
		a.Index = num
	} else {
		switch simd_type {
		case loong64.LSX:
			arng_type, ok = loong64LsxArngExtMap[ext]
			if !ok {
				return errors.New("Loong64 extension: invalid LSX arrangement type: " + ext)
			}