val foxPart = reader.nextPart()!!
    assertThat(foxPart.headers).isEqualTo(
      headersOf(
        "Content-Disposition",
        "form-data; name=\"animal\"; filename=\"fox.txt\"",
      ),
    )
    assertThat(foxPart.body.readUtf8()).isEqualTo("Fox")

    assertThat(reader.nextPart()).isNull()
  }

  /**

### `UploadFile`

`UploadFile` 은 다음과 같은 어트리뷰트가 있습니다:

* `filename` : 문자열(`str`)로 된 업로드된 파일의 파일명입니다 (예: `myimage.jpg`).
* `content_type` : 문자열(`str`)로 된 파일 형식(MIME type / media type)입니다 (예: `image/jpeg`).

	// provider URL), we hash and encode it to base64 here. This is needed
	// because there will be a policy mapping stored on drives whose
	// filename is this parentUser: therefore, it needs to have only valid
	// filename characters and needs to have bounded length.
	{
		h := sha256.New()
		h.Write([]byte("openid:" + subFromToken + ":" + issFromToken))
		bs := h.Sum(nil)

            "More data is available.", "Access is denied.", "The data area passed to a system call is too small.",
            "The filename, directory name, or volume label syntax is incorrect.", "The system cannot find the file specified.",
            "Cannot create a file when that file already exists.", "The handle is invalid.", "The specified path is invalid.",

          <type>int</type>
        </field>
        <field>
          <name>localCopy</name>
          <version>1.0.0+</version>
          <description>Whether to use a local copy instead (with filename that includes the base version)</description>
          <type>boolean</type>
          <defaultValue>false</defaultValue>
        </field>
      </fields>
    </class>
    <class java.clone="deep">

///

### `FileResponse`

🔁 🎏 📁 📨.

✊ 🎏 ⚒ ❌ 🔗 🌘 🎏 📨 🆎:

* `path` - 📁 📁 🎏.
* `headers` - 🙆 🛃 🎚 🔌, 📖.
* `media_type` - 🎻 🤝 📻 🆎. 🚥 🔢, 📁 ⚖️ ➡ 🔜 ⚙️ 🔑 📻 🆎.
* `filename` - 🚥 ⚒, 👉 🔜 🔌 📨 `Content-Disposition`.

📁 📨 🔜 🔌 ☑ `Content-Length`, `Last-Modified` & `ETag` 🎚.

{* ../../docs_src/custom_response/tutorial009.py hl[2,10] *}

👆 💪 ⚙️ `response_class` 🔢:

然后创建包含如下内容的 `traefik.toml` 文件：

```TOML hl_lines="3"
[entryPoints]
  [entryPoints.http]
    address = ":9999"

[providers]
  [providers.file]
    filename = "routes.toml"
```

这个文件把 Traefik 监听端口设置为 `9999`，并设置要使用另一个文件 `routes.toml`。

/// tip | 提示

使用端口 9999 代替标准的 HTTP 端口 80，这样就不必使用管理员权限运行（`sudo`）。

///

接下来，创建 `routes.toml`：

Dann erstellen Sie eine Datei `traefik.toml` mit:

```TOML hl_lines="3"
[entryPoints]
  [entryPoints.http]
    address = ":9999"

[providers]
  [providers.file]
    filename = "routes.toml"
```

Dadurch wird Traefik angewiesen, Port 9999 abzuhören und eine andere Datei `routes.toml` zu verwenden.

/// tip | Tipp

* `headers` - quaisquer cabeçalhos que serão incluídos, como um dicionário.
* `media_type` - Uma string com o media type. Se não for definida, o media type é inferido a partir do nome ou caminho do arquivo.
* `filename` - Se for definido, é incluído no cabeçalho `Content-Disposition`.

        public OptionalThing<jakarta.mail.Address> getSavedFrom() {

            return OptionalThing.empty();

        }

        @Override

        public void makeEmlFile(String fileName) {

        }

        @Override

        public String toHash() {

            return "mock-hash";

        }

        @Override
        public String toDisplay() {