* `headers` - 含めたい任意のカスタムヘッダーの辞書。
* `media_type` - メディアタイプを示す文字列。セットされなかった場合は、ファイル名やパスからメディアタイプが推察されます。
* `filename` - セットされた場合、レスポンスの `Content-Disposition` に含まれます。

ファイルレスポンスには、適切な `Content-Length` 、 `Last-Modified` 、 `ETag` ヘッダーが含まれます。

```Python hl_lines="2  10"
{!../../docs_src/custom_response/tutorial009.py!}
```

## デフォルトレスポンスクラス

**FastAPI** クラスのインスタンスか `APIRouter` を生成するときに、デフォルトのレスポンスクラスを指定できます。

	},
	{
		ObjectKey:  [32]byte{},
		ObjectInfo: ObjectInfo{ETag: "00000f00f27834c9a2654927546df57f9e998187496394d4ee80f3d9978f85f3c7d81f72600cdbe03d80dc5a13d69354"},
		ETag:       "",
		ShouldFail: true, // modified ETag
	},

	// Special tests for ETags that end with a '-x'
	{
		ObjectKey:  [32]byte{},
		ObjectInfo: ObjectInfo{ETag: "916516b396f0f4d4f2a0e7177557bec4-1"},
		ETag:       "916516b396f0f4d4f2a0e7177557bec4-1",

      meet the following conditions:

      (a) You must give any other recipients of the Work or
          Derivative Works a copy of this License; and

      (b) You must cause any modified files to carry prominent notices
          stating that You changed the files; and

      (c) You must retain, in the Source form of any Derivative Works
          that You distribute, all copyright, patent, trademark, and

      meet the following conditions:

      (a) You must give any other recipients of the Work or
          Derivative Works a copy of this License; and

      (b) You must cause any modified files to carry prominent notices
          stating that You changed the files; and

      (c) You must retain, in the Source form of any Derivative Works
          that You distribute, all copyright, patent, trademark, and

      meet the following conditions:

      (a) You must give any other recipients of the Work or
          Derivative Works a copy of this License; and

      (b) You must cause any modified files to carry prominent notices
          stating that You changed the files; and

      (c) You must retain, in the Source form of any Derivative Works
          that You distribute, all copyright, patent, trademark, and

  // spec contains the certificate request, and is immutable after creation.
  // Only the request, signerName, expirationSeconds, and usages fields can be set on creation.
  // Other fields are derived by Kubernetes and cannot be modified by users.
  optional CertificateSigningRequestSpec spec = 2;

  // status contains information about whether the request is approved or denied,

      meet the following conditions:

      (a) You must give any other recipients of the Work or
          Derivative Works a copy of this License; and

      (b) You must cause any modified files to carry prominent notices
          stating that You changed the files; and

      (c) You must retain, in the Source form of any Derivative Works
          that You distribute, all copyright, patent, trademark, and

      meet the following conditions:

      (a) You must give any other recipients of the Work or
          Derivative Works a copy of this License; and

      (b) You must cause any modified files to carry prominent notices
          stating that You changed the files; and

      (c) You must retain, in the Source form of any Derivative Works
          that You distribute, all copyright, patent, trademark, and

      meet the following conditions:

      (a) You must give any other recipients of the Work or
          Derivative Works a copy of this License; and

      (b) You must cause any modified files to carry prominent notices
          stating that You changed the files; and

      (c) You must retain, in the Source form of any Derivative Works
          that You distribute, all copyright, patent, trademark, and

      meet the following conditions:

      (a) You must give any other recipients of the Work or
          Derivative Works a copy of this License; and

      (b) You must cause any modified files to carry prominent notices
          stating that You changed the files; and

      (c) You must retain, in the Source form of any Derivative Works
          that You distribute, all copyright, patent, trademark, and