data = "<img src=\"http://example/foo.jpg\" width=\"100\" height=\"10\">";
        assertNull(transformer.getThumbnailUrl(responseData, getDocument(data)));

        data = "<img src=\"http://example/foo.jpg\" width=\"400\" height=\"100\">";
        assertNull(transformer.getThumbnailUrl(responseData, getDocument(data)));

`/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>

Şöyle bir request gönderebilirsiniz:

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

/// tip | İpucu

		t.Fatalf("Failed to find created data, got error: %v", err)
	} else if result.Name != "foo" || result.Name2 != "foo" || result.Name3 != "" || result.Age != 18 || !result.Enabled || result.Created.Format("20060102") != "20000102" {
		t.Fatalf("Failed to find created data with default data, got %+v", result)
	}

	type Harumph2 struct {
		ID      int       `gorm:"default:0"`

            final String queryId = data.getQueryId();
            final String highlightParams = data.getAppendHighlightParams();
            final boolean nextPage = data.isExistNextPage();
            final boolean prevPage = data.isExistPrevPage();
            final long startRecordNumber = data.getCurrentStartRecordNumber();
            final long endRecordNumber = data.getCurrentEndRecordNumber();

@app.get("/query")
async def query_model(data: Model = Query()):
    return {"param": data.param}


@app.get("/header")
async def header_model(data: Model = Header()):
    return {"param": data.param}


@app.get("/cookie")
async def cookie_model(data: Model = Cookie()):
    return {"param": data.param}


def test_query_model_with_alias():
    client = TestClient(app)

// getSHA256Hash returns SHA-256 hash in hex encoding of given data.
func getSHA256Hash(data []byte) string {
	return hex.EncodeToString(getSHA256Sum(data))
}

// getSHA256Hash returns SHA-256 sum of given data.
func getSHA256Sum(data []byte) []byte {
	hash := sha256.New()
	hash.Write(data)
	return hash.Sum(nil)
}

// getMD5Sum returns MD5 sum of given data.
func getMD5Sum(data []byte) []byte {
	hash := md5.New()
	hash.Write(data)

如果你查看 `/docs`，會看到欄位 `data` 需要 base64 編碼的位元組：

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

你可以發送如下的請求：

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

/// tip

`aGVsbG8=` 是 `hello` 的 base64 編碼。

///

接著 Pydantic 會將該 base64 字串解碼，並在模型的 `data` 欄位中提供原始位元組。

你會收到類似以下的回應：

```json
{

                                                <c:forEach var="data" varStatus="s"
                                                           items="${failureUrlItems}">
                                                    <tr data-href="${contextPath}/admin/failureurl/details/4/${f:u(data.id)}" role="button" tabindex="0">
                                                        <td>${f:h(data.url)}</td>

        ]
    }


@pytest.mark.parametrize(
    "path",
    ["/required-str", "/model-required-str"],
)
def test_required_str(path: str):
    client = TestClient(app)
    response = client.post(path, data={"p": "hello"})
    assert response.status_code == 200
    assert response.json() == {"p": "hello"}


# =====================================================================================
# Alias

                        e.getChildUrlList()
                                .stream() //
                                .filter(data -> !processedUrls.contains(data.getUrl())) //
                                .map(data -> new CrawlRequest(data.getUrl(), crawlRequest.getDepth() + 1)) //
                                .forEach(requestQueue::offer);
                    }