**FastAPI**는 아주 강력하지만 직관적인 **<dfn title="컴포넌트, 리소스, 제공자, 서비스, 인젝터블로도 알려져 있음">의존성 주입</dfn>** 시스템을 가지고 있습니다.

이는 사용하기 아주 쉽게 설계했으며, 어느 개발자나 다른 컴포넌트와 **FastAPI**를 쉽게 통합할 수 있도록 만들었습니다.

## "의존성 주입"은 무엇입니까? { #what-is-dependency-injection }

**"의존성 주입"**은 프로그래밍에서 여러분의 코드(이 경우, *경로 처리 함수*)가 작동하고 사용하는 데 필요로 하는 것, 즉 "의존성"을 선언할 수 있는 방법을 의미합니다.

그 후에, 시스템(이 경우 **FastAPI**)은 여러분의 코드가 요구하는 의존성을 제공하기 위해 필요한 모든 작업을 처리합니다.(의존성을 "주입"합니다)

    public SpnegoAuthenticator() {
        // do nothing
    }

    /**
     * Initializes the SPNEGO authenticator and registers it with the SSO manager.
     * This method is called automatically after dependency injection is complete.
     */
    @PostConstruct
    public void init() {
        if (logger.isDebugEnabled()) {
            logger.debug("Initializing {}", this.getClass().getSimpleName());
        }

   * of this queue less the current {@code size} of this queue.
   *
   * <p>Note that you cannot always tell if an attempt to insert an element will succeed by
   * inspecting {@code remainingCapacity} because it may be the case that another thread is about to
   * insert or remove an element.
   */
  @CanIgnoreReturnValue
  @Override
  public int remainingCapacity() {

    * クエリパラメータ。
    * クッキー、など。

さらに、Starlette のすべてのセキュリティ機能（**セッション Cookie** を含む）も利用できます。

これらはすべて再利用可能なツールやコンポーネントとして構築されており、システム、データストア、リレーショナル/NoSQL データベース等と容易に統合できます。

### 依存性の注入 { #dependency-injection }

FastAPI には、非常に使いやすく、かつ非常に強力な <dfn title='別名: コンポーネント、リソース、サービス、プロバイダー'><strong>依存性の注入</strong></dfn> システムがあります。

* 依存関係は依存関係を持つこともでき、階層または **依存関係の「グラフ」** を作成できます。
* すべてフレームワークによって**自動的に処理**されます。

  @Test fun ipv6AddressMalformed() {
    val cookie = parse("http://[::1]/".toHttpUrl(), "a=b; domain=::2::2")
    assertThat(cookie!!.domain).isEqualTo("::1")
  }

  /**
   * These public suffixes were selected by inspecting the publicsuffix.org list. It's possible they
   * may change in the future. If this test begins to fail, please double check they are still
   * present in the public suffix list.
   */
  @Test fun domainIsPublicSuffix() {

* Ein sehr leistungsfähiges und einfach zu bedienendes System für **<dfn title="auch bekannt als Komponenten, Ressourcen, Provider, Services, Injectables">Dependency Injection</dfn>**.
* Sicherheit und Authentifizierung, einschließlich Unterstützung für **OAuth2** mit **JWT-Tokens** und **HTTP Basic** Authentifizierung.

                return fessConfig.getRoleSearchGroupPrefix();
            }
        }
        return null;
    }

    /**
     * Escapes special characters in an LDAP search filter to prevent LDAP injection attacks.
     *
     * @param filter the LDAP search filter to escape (null is treated as empty string)
     * @return the escaped filter string safe for use in LDAP queries (empty string if filter is null)

 * together. Any creation method that would customarily respect insertion order (such as {@link
 * #copyOf(Multimap)}) instead preserves key-grouped order by inserting entries for an existing key
 * immediately after the last entry having that key.
 *
 * <p>See the Guava User Guide article on <a href=

                )
                if counterpart_dir in all_docs_content:
                    counterpart_found = True
            else:
                # Try inserting _an into parent directory name
                for suffix in ("_py39", "_py310"):
                    if suffix in parent_name:
                        an_parent = parent_name.replace(suffix, f"_an{suffix}", 1)

    # Handle non-param type annotations like Request
    # Only apply special handling when there's no explicit Depends - if there's a Depends,
    # the dependency will be called and its return value used instead of the special injection
    if depends is None and lenient_issubclass(
        type_annotation,
        (
            Request,
            WebSocket,
            HTTPConnection,
            Response,