我們稍後會把這個 `APIRouter` 加進主要的 `FastAPI` 應用程式中，但先來看看相依性與另一個 `APIRouter`。

## 相依性 { #dependencies }

我們發現應用程式的多個地方會用到一些相依性。

所以把它們放進獨立的 `dependencies` 模組（`app/dependencies.py`）。

接下來我們會用一個簡單的相依性來讀取自訂的 `X-Token` 標頭：

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

/// tip | 提示

為了簡化範例，我們使用了一個虛構的標頭。

但在真實情況下，使用內建的 [安全工具](security/index.md) 會有更好的效果。

			})
		}
		store.StreamItems(target.store, target, target.quitCh, target.loggerOnce)
	}

	return target, nil
}

func isKafkaConnErr(err error) bool {
	// Sarama opens the circuit breaker after 3 consecutive connection failures.
	return err == sarama.ErrLeaderNotAvailable || err.Error() == "circuit breaker is open"

 *
 * <p>There are three Win32 function calls provided by the Windows SDK
 * that are important in the context of using jCIFS. They are:
 *
 * <ul>
 * <li> <code>CallNamedPipe</code> A message-type pipe call that opens,
 *      writes to, reads from, and closes the pipe in a single operation.
 * <li> <code>TransactNamedPipe</code> A message-type pipe call that
 *      writes to and reads from an existing pipe descriptor in one operation.

   * file is a directory (and not a symbolic link), that directory is replaced by a symbolic link to
   * an outside directory before the call that opens the directory to read its entries.
   *
   * <p>By default, this method throws {@link InsecureRecursiveDeleteException} if it can't

labels.purgeUserInfoDay=刪除以前的使用者日誌
labels.reading=讀音
labels.roleTypeIds=角色ID
labels.scriptData=腳本
labels.scriptResult=結果
labels.scriptType=執行方法
labels.segmentation=分段
labels.startTime=開始時間
labels.target=目標
labels.token=令牌
labels.synonymFile=同義詞檔案
labels.stopwordsFile=停用詞檔案
labels.stemmerOverrideFile=詞幹覆蓋檔案
labels.mappingFile=映射檔案
labels.protwordsFile=Protwords檔案
labels.kuromojiFile=Kuromoji檔案
labels.elevateWordFile=提升詞檔案

testdata/huffman-zero.wb.expect", "src/compress/flate/testdata/huffman-zero.wb.expect-noinput", "src/compress/flate/testdata/null-long-match.dyn.expect-noinput", "src/compress/flate/testdata/null-long-match.wb.expect-noinput", "src/compress/flate/token.go", "src/compress/flate/writer_test.go", "src/compress/gzip/example_test.go", "src/compress/gzip/gunzip.go", "src/compress/gzip/gunzip_test.go", "src/compress/gzip/gzip.go", "src/compress/gzip/gzip_test.go", "src/compress/gzip/issue14937_test.go",...

errors.failed_to_download_mapping_file = Não foi possível baixar o arquivo de mapeamento.
errors.failed_to_upload_mapping_file = Não foi possível carregar o arquivo de mapeamento.
errors.invalid_kuromoji_token={0} não é um token válido.
errors.invalid_kuromoji_segmentation=O número de divisões de {0} não corresponde ao número de divisões de {1}.
errors.invalid_str_is_included = {1} é inválido em {0}.
errors.blank_password = A senha é obrigatória.

│   ├── main.py
│   └── test_main.py
```

이제 **FastAPI** 앱이 있는 `main.py` 파일에 몇 가지 다른 **경로 처리**가 추가된 경우를 생각해봅시다.

오류를 반환할 수 있는 `GET` 작업이 있습니다.

여러 다른 오류를 반환할 수 있는 `POST` 작업이 있습니다.

두 *경로 처리* 모두 `X-Token` 헤더를 요구합니다.

{* ../../docs_src/app_testing/app_b_an_py310/main.py *}

### 확장된 테스트 파일 { #extended-testing-file }

이제는 `test_main.py`를 확장된 테스트들로 수정할 수 있습니다:

    @Size(max = 1000)
    public String oicClientSecret;

    /** OpenID Connect authorization server URL. */
    @Size(max = 1000)
    public String oicAuthServerUrl;

    /** OpenID Connect token server URL. */
    @Size(max = 1000)
    public String oicTokenServerUrl;

    /** OpenID Connect redirect URL. */
    @Size(max = 1000)
    public String oicRedirectUrl;

    /** OpenID Connect scope. */

     */
    public static VirtualHostHelper getVirtualHostHelper() {
        return getComponent(VIRTUAL_HOST_HELPER);
    }

    /**
     * Gets the access token helper component.
     * @return The access token helper.
     */
    public static AccessTokenHelper getAccessTokenHelper() {
        return getComponent(ACCESS_TOKEN_HELPER);
    }

    /**