}

// Set of s3 handler options as bit flags.
type s3HFlag uint8

const (
	// when provided, disables Gzip compression.
	noGZS3HFlag = 1 << iota

	// when provided, enables only tracing of headers. Otherwise, both headers
	// and body are traced.
	traceHdrsS3HFlag

	// when provided, disables throttling via the `maxClients` middleware.
	noThrottleS3HFlag
)

func (h s3HFlag) has(flag s3HFlag) bool {

   * is defined as the function h such that {@code h(a) == g(f(a))} for each {@code a}.
   *
   * <p><b>JRE users and Android users who opt in to library desugaring:</b> use {@code
   * g.compose(f)} or (probably clearer) {@code f.andThen(g)} instead. Note that it is not
   * serializable.
   *
   * @param g the second function to apply
   * @param f the first function to apply
   * @return the composition of {@code f} and {@code g}

**Spoiler-Alarm**: Das Tutorial – Benutzerhandbuch enthält:

* Deklaration von **Parametern** von anderen verschiedenen Stellen wie: **Header**, **Cookies**, **Formularfelder** und **Dateien**.
* Wie man **Validierungs-Constraints** wie `maximum_length` oder `regex` setzt.

            <option value="$PROJECT_DIR$/platforms/core-runtime/gradle-cli" />
            <option value="$PROJECT_DIR$/platforms/core-runtime/gradle-cli-main" />
            <option value="$PROJECT_DIR$/platforms/core-runtime/groovy-loader" />
            <option value="$PROJECT_DIR$/platforms/core-runtime/installation-beacon" />
            <option value="$PROJECT_DIR$/platforms/core-runtime/instrumentation-agent" />

/// tip | Tipp

Hier verwenden wir `Query()`, weil dies ein **Query-Parameter** ist. Später werden wir andere wie `Path()`, `Body()`, `Header()`, und `Cookie()` sehen, die auch dieselben Argumente wie `Query()` akzeptieren.

///

FastAPI wird nun:

* Die Daten **validieren**, um sicherzustellen, dass die Länge maximal 50 Zeichen beträgt

/// tip | Dica

Aqui estamos usando `Query()` porque este é um parâmetro de consulta. Mais adiante veremos outros como `Path()`, `Body()`, `Header()` e `Cookie()`, que também aceitam os mesmos argumentos que `Query()`.

///

Agora o FastAPI vai:

* Validar os dados garantindo que o comprimento máximo seja de 50 caracteres

{* ../../docs_src/bigger_applications/app_an_py310/dependencies.py hl[3,6:8] title["app/dependencies.py"] *}

/// tip | İpucu

Örneği basit tutmak için uydurma bir header kullanıyoruz.

Ancak gerçek senaryolarda, entegre [Security yardımcı araçlarını](security/index.md) kullanarak daha iyi sonuç alırsınız.

///

## `APIRouter` ile Başka Bir Module { #another-module-with-apirouter }

この場合、`:8080` のフロントエンドを正しく機能させるには、そのリストに `http://localhost:8080` を含める必要があります。

## ワイルドカード { #wildcards }

リストを `"*"` (「ワイルドカード」) と宣言して、すべてを許可することもできます。

ただし、クレデンシャル情報に関するもの、つまりCookie、Bearer Tokenで使用されるようなAuthorizationヘッダーなどを含むものは除外され、特定の種類の通信のみが許可されます。

したがって、すべてを正しく機能させるために、許可されたオリジンの明示的な指定をお勧めします。

## `CORSMiddleware` の使用 { #use-corsmiddleware }

Bu detaylar implementasyon'a bağlıdır.

OAuth2 için bunlar sadece string'dir.

///

## Genel görünüm { #global-view }

Önce, ana **Tutorial - User Guide** içindeki [Password (ve hashing) ile OAuth2, JWT token'lı Bearer](../../tutorial/security/oauth2-jwt.md) örneklerinden, OAuth2 scope'larına geçince hangi kısımların değiştiğine hızlıca bakalım:

{* ../../docs_src/security/tutorial005_an_py310.py hl[5,9,13,47,65,106,108:116,122:126,130:136,141,157] *}

pkg html/template, func ParseFS(fs.FS, ...string) (*Template, error)
pkg html/template, method (*Template) ParseFS(fs.FS, ...string) (*Template, error)
pkg io, func NopCloser(Reader) ReadCloser
pkg io, func ReadAll(Reader) ([]uint8, error)
pkg io, type ReadSeekCloser interface { Close, Read, Seek }
pkg io, type ReadSeekCloser interface, Close() error
pkg io, type ReadSeekCloser interface, Read([]uint8) (int, error)