## Response Model encoding parameters { #response-model-encoding-parameters }

Your response model could have default values, like:

{* ../../docs_src/response_model/tutorial004_py310.py hl[9,11:12] *}

* `description: Union[str, None] = None` (or `str | None = None` in Python 3.10) has a default of `None`.
* `tax: float = 10.5` has a default of `10.5`.
* `tags: List[str] = []` has a default of an empty list: `[]`.

## Parâmetros de codificação do modelo de resposta { #response-model-encoding-parameters }

Seu modelo de resposta pode ter valores padrão, como:

{* ../../docs_src/response_model/tutorial004_py310.py hl[9,11:12] *}

* `description: Union[str, None] = None` (ou `str | None = None` no Python 3.10) tem um padrão de `None`.
* `tax: float = 10.5` tem um padrão de `10.5`.
* `tags: List[str] = []` tem um padrão de uma lista vazia: `[]`.

## Parámetros de codificación del Modelo de Response { #response-model-encoding-parameters }

Tu modelo de response podría tener valores por defecto, como:

{* ../../docs_src/response_model/tutorial004_py310.py hl[9,11:12] *}

* `description: Union[str, None] = None` (o `str | None = None` en Python 3.10) tiene un valor por defecto de `None`.
* `tax: float = 10.5` tiene un valor por defecto de `10.5`.

	if len(disks) == 0 {
		return fmt.Errorf("no online drives found for set with endpoints %s", set.getEndpoints())
	}

	// However many we ask, versions must exist on ~50%
	listingQuorum := (set.setDriveCount + 1) / 2

	// How to resolve partial results.
	resolver := metadataResolutionParams{
		dirQuorum: listingQuorum, // make sure to capture all quorum ratios
		objQuorum: listingQuorum, // make sure to capture all quorum ratios

		11: {bucketName: bucket, objName: object, inputData: []byte("efgh"), inputMeta: map[string]string{"etag": "1f7690ebdd9b4caf8fab49ca1757bf27"}, inputDataSize: int64(len("efgh"))},
		12: {bucketName: bucket, objName: object, inputData: []byte("ijkl"), inputMeta: map[string]string{"etag": "09a0877d04abf8759f99adec02baf579"}, inputDataSize: int64(len("ijkl"))},

	})
	if err != nil {
		c.Fatalf("unable to attach policy: %v", err)
	}

	// 1. Create a service account for the user
	cr := c.mustCreateSvcAccount(ctx, accessKey, s.adm)

	// 1.2 Check that svc account appears in listing
	c.assertSvcAccAppearsInListing(ctx, s.adm, accessKey, cr.AccessKey)

	// 1.3 Check that svc account info can be queried

			dec.Reset(nil)
			s2DecPool.Put(dec)
			readMsgpReaderPoolPut(mr)
		},
		creator: func() error {
			v, err := mr.ReadByte()
			if err != nil {
				return err
			}
			switch v {
			case 1, 2:
			default:
				return fmt.Errorf("metacacheReader: Unknown version: %d", v)
			}
			return nil
		},
	}
}

func (r *metacacheReader) checkInit() {
	if r.creator == nil || r.err != nil {

		var buf [directory64EndLen + directory64LocLen]byte
		b := writeBuf(buf[:])

		// zip64 end of central directory record
		b.uint32(directory64EndSignature)
		b.uint64(directory64EndLen - 12) // length minus signature (uint32) and length fields (uint64)
		b.uint16(zipVersion45)           // version made by
		b.uint16(zipVersion45)           // version needed to extract

さらに、ユーザーを認証して返す関数も作成します。

{* ../../docs_src/security/tutorial004.py hl[7,48,55:56,59:60,69:75] *}

/// note | 備考

新しい（偽の）データベース`fake_users_db`を確認すると、ハッシュ化されたパスワードが次のようになっていることがわかります：`"$2b$12$EixZaYVK1fsbw1ZfbX3OXePaWxn96p36WQoeG6Lruj3vjPGga31lW"`

///

## JWTトークンの取り扱い

インストールした複数のモジュールをインポートします。

JWTトークンの署名に使用されるランダムな秘密鍵を生成します。

安全なランダム秘密鍵を生成するには、次のコマンドを使用します：

	h  *Header
	fm fs.FileMode
}

func TestHeaderRoundTrip(t *testing.T) {
	vectors := []headerRoundTripTest{{
		// regular file.
		h: &Header{
			Name:     "test.txt",
			Mode:     0644,
			Size:     12,
			ModTime:  time.Unix(1360600916, 0),
			Typeflag: TypeReg,
		},
		fm: 0644,
	}, {
		// symbolic link.
		h: &Header{
			Name:     "link.txt",
			Mode:     0777,
			Size:     0,