## Gérer les erreurs et les valeurs de retour des dépendances { #dependencies-errors-and-return-values }

Vous pouvez utiliser les mêmes *fonctions* de dépendance que d'habitude.

### Définir les exigences des dépendances { #dependency-requirements }

Elles peuvent déclarer des exigences pour la requête (comme des en-têtes) ou d'autres sous-dépendances :

{* ../../docs_src/dependencies/tutorial006_an_py310.py hl[8,13] *}

    "crossVersionTests": false
  },
  {
    "name": "dependency-management",
    "path": "platforms/software/dependency-management",
    "unitTests": true,
    "functionalTests": true,
    "crossVersionTests": true
  },
  {
    "name": "dependency-management-serialization-codecs",
    "path": "platforms/core-configuration/dependency-management-serialization-codecs",
    "unitTests": false,

-->

#### What type of PR is this?

<!--
Add one of the following kinds:
/kind bug
/kind dependency
/kind cleanup
/kind documentation
/kind feature

Optionally add one or more of the following kinds if applicable:
/kind api-change
/kind deprecation
/kind failing-test
/kind flake
/kind regression

Bu yüzden onları ayrı bir `dependencies` module’üne koyuyoruz (`app/dependencies.py`).

Şimdi, özel bir `X-Token` header'ını okumak için basit bir dependency kullanalım:

{* ../../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.

        }

        @Override
        public ModelData fromCache(ModelData data) {
            return intoCache(data);
        }
    };

    /**
     * The tag used to denote an effective dependency management section from an imported model.
     */
    ModelCacheTag<DependencyManagement> IMPORT = new ModelCacheTag<DependencyManagement>() {

        @Override
        public String getName() {

    public FileTypeHelper() {
        // Default constructor
    }

    /**
     * Initializes the file type mappings by loading configuration from Fess settings.
     * This method is called automatically after dependency injection is complete.
     * The mappings are loaded from the index filetype configuration property,
     * where each line contains a MIME type to file type mapping in the format "mimetype=filetype".
     */

在這個範例中我們使用了自訂的（虛構的）標頭 `X-Key` 與 `X-Token`。

但在實際情況下，當你實作安全機制時，使用整合的 [Security utilities（下一章）](../security/index.md) 會獲得更多好處。

///

## 依賴的錯誤與回傳值 { #dependencies-errors-and-return-values }

你可以使用與平常相同的依賴函式。

### 依賴的需求 { #dependency-requirements }

它們可以宣告請求需求（例如標頭（headers））或其他子依賴：

{* ../../docs_src/dependencies/tutorial006_an_py310.py hl[8,13] *}

### 拋出例外 { #raise-exceptions }

這些依賴可以 `raise` 例外，與一般依賴相同：

{* ../../docs_src/security/tutorial002_an_py310.py hl[5,12:6] *}

## Создать зависимость `get_current_user` { #create-a-get-current-user-dependency }

Давайте создадим зависимость `get_current_user`.

Помните, что у зависимостей могут быть подзависимости?

`get_current_user` будет иметь зависимость от того же `oauth2_scheme`, который мы создали ранее.

import static org.junit.jupiter.api.Assertions.assertFalse;
import static org.junit.jupiter.api.Assertions.assertNotNull;
import static org.junit.jupiter.api.Assertions.assertTrue;

/**
 * A test which demonstrates maven's dependency management
 *
 */
@Deprecated
@SuppressWarnings("checkstyle:UnusedLocalVariable")
class ProjectInheritanceTest extends AbstractProjectInheritanceTestCase {

        println("Deployed ${file.name}")
      }
    } catch (e: IllegalArgumentException) {
      if ("Jar does not have a symbolic name" in e.message!!) {
        println("Skipped non-OSGi dependency: ${file.name}")
        return
      }
      throw e
    }
  }

  companion object {
    val fileSystem = FileSystem.SYSTEM