PrintWriter w = new PrintWriter(Files.newWriter(temp, UTF_8));
    w.println("hello");
    w.println("");
    w.println(" world  ");
    w.println("");
    w.close();

    assertThat(Files.readFirstLine(temp, UTF_8)).isEqualTo("hello");
    assertEquals(ImmutableList.of("hello", "", " world  ", ""), Files.readLines(temp, UTF_8));

    assertTrue(temp.delete());
  }

それ以外は **FastAPI** が処理します。

実行して [http://localhost:8000/v1/](http://localhost:8000/v1/) にアクセスすると、Flask からのレスポンスが表示されます:

```txt
Hello, World from Flask!
```

さらに [http://localhost:8000/v2](http://localhost:8000/v2) にアクセスすると、FastAPI からのレスポンスが表示されます:

```JSON
{
    "message": "Hello World"
}

    "data": "aGVsbG8="
}
```

/// tip | Dica

`aGVsbG8=` é a codificação base64 de `hello`.

///

Em seguida, o Pydantic decodificará a string base64 e fornecerá os bytes originais no campo `data` do modelo.

Você receberá uma response assim:

```json
{
  "description": "Some data",
  "content": "hello"
}
```

## Pydantic `bytes` para dados de saída { #pydantic-bytes-for-output-data }

Se você rodar a aplicação e ir até [http://localhost:8000/v1/](http://localhost:8000/v1/), você verá o retorno do Flask:

```txt
Hello, World from Flask!
```

E se você for até [http://localhost:8000/v2](http://localhost:8000/v2), você verá o retorno do FastAPI:

```JSON
{
    "message": "Hello World"
}

  @Test
  fun singleElement() {
    val tags = EmptyTags.plus(String::class, "hello")
    assertThat(tags[String::class]).isEqualTo("hello")
  }

  @Test
  fun multipleElements() {
    val tags =
      EmptyTags
        .plus(String::class, "hello")
        .plus(Integer::class, 5 as Integer)
    assertThat(tags[String::class]).isEqualTo("hello")
    assertThat(tags[Integer::class]).isEqualTo(5)
  }

Il renvoie simplement une réponse JSON avec le résultat de la méthode `.openapi()` de l'application.

Par défaut, la méthode `.openapi()` vérifie la propriété `.openapi_schema` pour voir si elle contient des données et les renvoie.

Sinon, elle les génère à l'aide de la fonction utilitaire `fastapi.openapi.utils.get_openapi`.

Et cette fonction `get_openapi()` reçoit comme paramètres :

```txt
Hello, World from Flask!
```

Und wenn Sie auf [http://localhost:8000/v2](http://localhost:8000/v2) gehen, sehen Sie die Response von FastAPI:

```JSON
{
    "message": "Hello World"
}

		{
			objectName:         "test",
			data:               []byte("Hello, World"),
			expectedRespStatus: http.StatusForbidden,
			accessKey:          "",
			secretKey:          "",
			malformedBody:      false,
		},
		// Bad case malformed input.
		{
			objectName:         "test",
			data:               []byte("Hello, World"),
			expectedRespStatus: http.StatusBadRequest,

    assertHash(679745764, murmur3_32().hashUnencodedChars("k"));
    assertHash(1510782915, murmur3_32().hashUnencodedChars("hell"));
    assertHash(-675079799, murmur3_32().hashUnencodedChars("hello"));
    assertHash(1935035788, murmur3_32().hashUnencodedChars("http://www.google.com/"));
    assertHash(
        -528633700, murmur3_32().hashUnencodedChars("The quick brown fox jumps over the lazy dog"));
  }

    Request request = new Request.Builder()
      .url(HttpUrl.get("https://square.com/"))
      .tag(Integer.class, 5)
      .tag(String.class, "hello")
      .build();
    Call call = client.newCall(request);

    assertEquals(5, call.tag(Integer.class));
    assertEquals("hello", call.tag(String.class));
    assertEquals(null, call.tag(Boolean.class));
    assertEquals(null, call.tag(Object.class));
  }

  @Test