你可以透過 `openapi_extra` 辦到：

{* ../../docs_src/path_operation_advanced_configuration/tutorial006_py310.py hl[19:36, 39:40] *}

在這個範例中，我們沒有宣告任何 Pydantic 模型。事實上，請求本文甚至不會被 <dfn title="從某種純格式（例如 bytes）轉換為 Python 物件">解析</dfn> 為 JSON，而是直接以 `bytes` 讀取，並由函式 `magic_data_reader()` 以某種方式負責解析。

儘管如此，我們仍可宣告請求本文的預期結構。

### 自訂 OpenAPI Content-Type { #custom-openapi-content-type }

{* ../../docs_src/stream_data/tutorial001_py310.py ln[32:35] hl[33] *}

这也意味着，使用 `StreamingResponse` 时，你拥有按需精确生成与编码字节数据的自由，同时也承担相应的责任，它与类型注解无关。🤓

### 流式传输字节 { #stream-bytes }

主要的用例之一是流式传输 `bytes` 而不是字符串，这当然可以做到。

{* ../../docs_src/stream_data/tutorial001_py310.py ln[44:47] hl[47] *}

## 自定义 `PNGStreamingResponse` { #a-custom-pngstreamingresponse }

//
// You should have received a copy of the GNU Affero General Public License
// along with this program.  If not, see <http://www.gnu.org/licenses/>.

package cmd

import (
	"bytes"
	"context"
	"encoding/hex"
	"fmt"
	"os"
	"reflect"
	"sync"

	"github.com/cespare/xxhash/v2"
	"github.com/klauspost/reedsolomon"
	"github.com/minio/minio/internal/logger"
)

   * reading, such as an {@code InputStream}. Unlike with writable resources, there's no chance that
   * a failure that occurs when closing the stream indicates a meaningful problem such as a failure
   * to flush all bytes to the underlying resource.
   *
   * @param inputStream the input stream to be closed, or {@code null} in which case this method
   *     does nothing
   * @since 17.0
   */

		NodeCount:             numNodes,
	}
	go m.trackEWMA()
	return m
}

func (m *Monitor) updateMeasurement(opts BucketOptions, bytes uint64) {
	m.mlock.Lock()
	defer m.mlock.Unlock()

	tm, ok := m.bucketsMeasurement[opts]
	if !ok {
		tm = &bucketMeasurement{}
	}
	tm.incrementBytes(bytes)
	m.bucketsMeasurement[opts] = tm
}

// SelectionFunction for buckets
type SelectionFunction func(bucket string) bool

        void testInheritance() {
            assertTrue(echoResponse instanceof ServerMessageBlock2Response);
        }
    }

    @Nested
    @DisplayName("Write Bytes Wire Format Tests")
    class WriteBytesWireFormatTests {

        @Test
        @DisplayName("Should return 0 for writeBytesWireFormat")
        void testWriteBytesWireFormat() {

	//
	// Note: The size of the security token that STS APIs return is not fixed. We
	// strongly recommend that you make no assumptions about the maximum size. As
	// of this writing, the typical size is less than 4096 bytes, but that can vary.
	// Also, future updates to AWS might require larger sizes.
	Credentials auth.Credentials `xml:",omitempty"`

	// A percentage value that indicates the size of the policy in packed form.

## 定义 `File` 与 `Form` 参数 { #define-file-and-form-parameters }

创建文件和表单参数的方式与 `Body` 和 `Query` 一样：

{* ../../docs_src/request_forms_and_files/tutorial001_an_py310.py hl[10:12] *}

文件和表单字段作为表单数据上传与接收。

并且你可以将部分文件声明为 `bytes`，将部分文件声明为 `UploadFile`。

/// warning | 警告

可在一个*路径操作*中声明多个 `File` 与 `Form` 参数，但不能同时声明要接收 JSON 的 `Body` 字段。因为此时请求体的编码为 `multipart/form-data`，不是 `application/json`。

这不是 **FastAPI** 的问题，而是 HTTP 协议的规定。

///

* **GraphQL**-Integration mit [Strawberry](https://strawberry.rocks) und anderen Bibliotheken.
* Viele zusätzliche Features (dank Starlette) wie:
    * **WebSockets**
    * extrem einfache Tests auf Basis von HTTPX und `pytest`
    * **CORS**
    * **Cookie-Sessions**
    * ... und mehr.

### Ihre App deployen (optional) { #deploy-your-app-optional }

class ContentSizeLimitMiddleware:
    """Content size limiting middleware for ASGI applications
    Args:
      app (ASGI application): ASGI application
      max_content_size (optional): the maximum content size allowed in bytes, None for no limit
    """

    def __init__(self, app: APIRouter, max_content_size: int | None = None):
        self.app = app
        self.max_content_size = max_content_size

    def receive_wrapper(self, receive):