writeErrorResponseJSON(ctx, w, errorCodes.ToAPIErr(ErrAdminConfigTooLarge), r.URL)
		return
	}

	// Ensure body content type is opaque to ensure that request body has not
	// been interpreted as form data.
	contentType := r.Header.Get("Content-Type")
	if contentType != "application/octet-stream" {
		writeErrorResponseJSON(ctx, w, errorCodes.ToAPIErr(ErrBadRequest), r.URL)
		return
	}

	[net/http]                         # package link
	[#12345](/issue/12345)             # GitHub issues
	[CL 6789](/cl/6789)                # Gerrit changelists

To preview `next` content in merged form using a local instance of the website, run:

```
go run golang.org/x/website/cmd/golangorg@latest -goroot=..
```

Then open http://localhost:6060/doc/next. Refresh the page to see your latest edits.

}
```

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

## Pydantic `bytes` 用於輸出資料 { #pydantic-bytes-for-output-data }

你也可以在模型設定中搭配 `ser_json_bytes` 使用 `bytes` 欄位來處理輸出資料；當產生 JSON 回應時，Pydantic 會將位元組以 base64 進行序列化。

                    "get": {
                        "responses": {
                            "200": {
                                "description": "Successful Response",
                                "content": {"application/json": {"schema": {}}},
                            }
                        },
                        "summary": "Read Current User",
                        "operationId": "read_current_user_users_me_get",

            - 'test-windows'
          black-list-labels:
            - '>test-mute'
    builders:
      - inject:
          properties-file: '.ci/java-versions.properties'
          properties-content: |
            JAVA_HOME=$USERPROFILE\\.java\\$ES_BUILD_JAVA
            RUNTIME_JAVA_HOME=$USERPROFILE\\.java\\$ES_RUNTIME_JAVA
            JAVA15_HOME=$USERPROFILE\\.java\\openjdk15
            GRADLE_TASK=checkPart2

                "operationId": "read_items_items__get",
                "responses": {
                    "200": {
                        "description": "Successful Response",
                        "content": {
                            "application/json": {
                                "schema": {}
                            }
                        }
                    }
                },

func (a *Args) Validate() error {
	req, err := http.NewRequest(http.MethodPost, a.URL.String(), bytes.NewReader([]byte("")))
	if err != nil {
		return err
	}

	req.Header.Set("Content-Type", "application/json")
	if a.AuthToken != "" {
		req.Header.Set("Authorization", a.AuthToken)
	}

	client := &http.Client{Transport: a.Transport}
	resp, err := client.Do(req)
	if err != nil {
		return err

        String body = response.getBody().asString();
        assertTrue(body != null, "CSV response should not be null");
    }

    @Test
    void testUploadCsv_ok() {
        // Create CSV content with format: suggest_word,reading,boost
        String csvContent = NAME_PREFIX + "uploadTest1,,10\n" + NAME_PREFIX + "uploadTest2,,20\n";

        // Upload CSV

        // Verify the number of bytes written
        assertEquals(expectedBytes.length, bytesWritten, "The number of bytes written should match the length of the dialect string.");
        // Verify the content of the destination array
        assertArrayEquals(expectedBytes, dst, "The destination array should contain the ASCII bytes of the dialect string.");
    }

    /**
     * Test the readParameterWordsWireFormat method.

{* ../../docs_src/first_steps/tutorial003_py310.py hl[7] *}

/// note

If you don't know the difference, check the [Async: *"In a hurry?"*](../async.md#in-a-hurry).

///

### Step 5: return the content { #step-5-return-the-content }

{* ../../docs_src/first_steps/tutorial001_py310.py hl[8] *}

You can return a `dict`, `list`, singular values as `str`, `int`, etc.