{* ../../docs_src/json_base64_bytes/tutorial001_py310.py ln[1:9,29:35] hl[9] *}

`/docs`'a bakarsanız, `data` alanının base64 ile encode edilmiş bytes beklediğini görürsünüz:

<div class="screenshot">
<img src="/img/tutorial/json-base64-bytes/image01.png">
</div>

   * enclosed} by both this range and {@code other}.
   *
   * <p>For example,
   *
   * <ul>
   *   <li>{@code [2, 4)} and {@code [5, 7)} are not connected
   *   <li>{@code [2, 4)} and {@code [3, 5)} are connected, because both enclose {@code [3, 4)}
   *   <li>{@code [2, 4)} and {@code [4, 6)} are connected, because both enclose the empty range
   *       {@code [4, 4)}
   * </ul>
   *

{* ../../docs_src/json_base64_bytes/tutorial001_py310.py ln[1:9,29:35] hl[9] *}

Wenn Sie die `/docs` aufrufen, zeigt die Dokumentation, dass das Feld `data` base64-kodierte Bytes erwartet:

<div class="screenshot">
<img src="/img/tutorial/json-base64-bytes/image01.png">
</div>

                    return new SampleElements<>(
                        mapEntry(Range.singleton(0), "banana"),
                        mapEntry(Range.closedOpen(3, 5), "frisbee"),
                        mapEntry(Range.atMost(-1), "fruitcake"),
                        mapEntry(Range.open(10, 15), "elephant"),
                        mapEntry(Range.closed(20, 22), "umbrella"));

`bytes` 필드를 가진 Pydantic 모델을 선언하고, 모델 설정에서 `val_json_bytes`를 사용하도록 지정하면 입력 JSON 데이터를 base64로 “검증”하도록 할 수 있습니다. 이 검증 과정의 일부로 base64 문자열을 바이트로 디코딩합니다.

{* ../../docs_src/json_base64_bytes/tutorial001_py310.py ln[1:9,29:35] hl[9] *}

`/docs`를 확인하면 `data` 필드가 base64로 인코딩된 bytes를 기대한다고 표시됩니다:

<div class="screenshot">
<img src="/img/tutorial/json-base64-bytes/image01.png">
</div>

아래와 같은 요청을 보낼 수 있습니다:

```json
{

	unparsableRangeSpecs := []string{
		"bytes=-",
		"bytes==",
		"bytes==1-10",
		"bytes=",
		"bytes=aa",
		"aa",
		"",
		"bytes=1-10-",
		"bytes=1--10",
		"bytes=-1-10",
		"bytes=0-+3",
		"bytes=+3-+5",
		"bytes=10-11,12-10", // Unsupported by S3/MinIO (valid in RFC)
	}
	for i, urs := range unparsableRangeSpecs {
		rs, err := parseRequestRangeSpec(urs)
		if err == nil {

{* ../../docs_src/json_base64_bytes/tutorial001_py310.py ln[1:9,29:35] hl[9] *}

Якщо ви перевірите `/docs`, там буде показано, що поле `data` очікує байти, закодовані в base64:

<div class="screenshot">
<img src="/img/tutorial/json-base64-bytes/image01.png">
</div>

{* ../../docs_src/json_base64_bytes/tutorial001_py310.py ln[1:9,29:35] hl[9] *}

Si revisas `/docs`, verás que el campo `data` espera bytes codificados en base64:

<div class="screenshot">
<img src="/img/tutorial/json-base64-bytes/image01.png">
</div>

Podrías enviar un request como:

{* ../../docs_src/json_base64_bytes/tutorial001_py310.py ln[1:9,29:35] hl[9] *}

Se você verificar a `/docs`, verá que o campo `data` espera bytes codificados em base64:

<div class="screenshot">
<img src="/img/tutorial/json-base64-bytes/image01.png">
</div>

Sie können den Rückgabetyp auch weglassen. FastAPI verwendet dann den [`jsonable_encoder`](./encoder.md), um die Daten zu konvertieren und zu senden.

{* ../../docs_src/server_sent_events/tutorial001_py310.py ln[34:37] hl[35] *}

## `ServerSentEvent` { #serversentevent }

Wenn Sie SSE-Felder wie `event`, `id`, `retry` oder `comment` setzen müssen, können Sie statt reiner Daten `ServerSentEvent`-Objekte yielden.