```json
{
    "description": "Some data",
    "data": "aGVsbG8="
}
```

/// tip | 豆知識

`aGVsbG8=` は `hello` の base64 エンコードです。

///

その後、Pydantic は base64 文字列をデコードし、モデルの `data` フィールドに元のバイト列を渡します。

次のようなレスポンスを受け取ります:

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

## 出力データ向けの Pydantic `bytes` { #pydantic-bytes-for-output-data }

Helló
világ

    val request =
      Request(
        url = server.url("/"),
        body = "hello".toRequestBody(),
      )
    client.newCall(request).execute().use { response ->
      assertThat(response.body.string()).isEqualTo("")
    }
    val recordedRequest = server.takeRequest()
    assertThat(recordedRequest.body).isEqualTo("hello".encodeUtf8())
  }

        assertNull(response.getModel());
    }

    @Test
    public void test_constructorWithContent() {
        final LlmChatResponse response = new LlmChatResponse("Hello, World!");
        assertEquals("Hello, World!", response.getContent());
        assertNull(response.getFinishReason());
        assertNull(response.getPromptTokens());
        assertNull(response.getCompletionTokens());

from fastapi import FastAPI
from fastapi.responses import JSONResponse

app = FastAPI()


@app.get("/headers/")
def get_headers():
    content = {"message": "Hello World"}
    headers = {"X-Cat-Dog": "alone in the world", "Content-Language": "en-US"}

	doneCh1 := make(chan struct{})
	defer close(doneCh1)
	if err := ps.Subscribe(MaskAll, ch1, doneCh1, func(entry Maskable) bool { return true }); err != nil {
		t.Fatalf("unexpected error: %v", err)
	}
	val := maskString("hello")
	ps.Publish(val)
	msg := <-ch1
	if msg != val {
		t.Fatalf("expected %s , found %s", val, msg)
	}
}

func TestMultiPubSub(t *testing.T) {
	ps := New[Maskable, Maskable](2)

Do NOT convert quotes in code snippets and code blocks to their German typographic equivalents.

Examples:

Source (English):

```
"Hello world"
“Hello Universe”
"He said: 'Hello'"
“my name is ‘Nils’”
`"__main__"`
`"items"`
```

Result (German):

```
„Hallo Welt“
„Hallo Universum“
„Er sagte: ‚Hallo‘“
„Mein Name ist ‚Nils‘“
`"__main__"`

client = TestClient(app, root_path="/api/v1")


def test_main():
    response = client.get("/app")
    assert response.status_code == 200
    assert response.json() == {"message": "Hello World", "root_path": "/api/v1"}


def test_openapi():
    response = client.get("/openapi.json")
    assert response.status_code == 200
    assert response.json() == snapshot(
        {

from fastapi import FastAPI

app = FastAPI()


@app.get("/")
def root():

<span style="color: green;">INFO</span>:     Uvicorn running on http://127.0.0.1:8000 (Press CTRL+C to quit)
```

</div>

Response şöyle bir şey olur:

```JSON
{
    "message": "Hello World",
    "root_path": "/api/v1"
}
```

### FastAPI Uygulamasında `root_path` Ayarlama { #setting-the-root-path-in-the-fastapi-app }