from fastapi import FastAPI, File, UploadFile
from typing_extensions import Annotated

app = FastAPI()


@app.post("/files/")
async def create_file(file: Annotated[bytes, File()]):
    return {"file_size": len(file)}


@app.post("/uploadfile/")
async def create_upload_file(file: UploadFile):

from typing import Annotated

from fastapi import FastAPI, File, Form, UploadFile

app = FastAPI()


@app.post("/files/")
async def create_file(
    file: Annotated[bytes, File()],
    fileb: Annotated[UploadFile, File()],
    token: Annotated[str, Form()],
):
    return {
        "file_size": len(file),
        "token": token,
        "fileb_content_type": fileb.content_type,

```

## 定义 `File` 与 `Form` 参数

创建文件和表单参数的方式与 `Body` 和 `Query` 一样：

```Python hl_lines="8"
{!../../docs_src/request_forms_and_files/tutorial001.py!}
```

文件和表单字段作为表单数据上传与接收。

声明文件可以使用 `bytes` 或 `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。

///

## 小结

     * @param raw
     */
    public AvTimestamp ( byte[] raw ) {
        super(AvPair.MsvAvTimestamp, raw);
    }


    /**
     * 
     * @param ts
     */
    public AvTimestamp ( long ts ) {
        this(encode(ts));
    }


    /**
     * @param ts
     * @return
     */
    private static byte[] encode ( long ts ) {
        byte[] data = new byte[8];
        SMBUtil.writeInt8(ts, data, 0);

			}
		}
	}
}

var decryptTests = []struct {
	Key       []byte
	ETag      ETag
	Plaintext ETag
}{
	{ // 0
		Key:       make([]byte, 32),
		ETag:      must("3b83ef96387f14655fc854ddc3c6bd57"),
		Plaintext: must("3b83ef96387f14655fc854ddc3c6bd57"),
	},
	{ // 1
		Key:       make([]byte, 32),
		ETag:      must("7b976cc68452e003eec7cb0eb631a19a-1"),

public final class Floats extends FloatsMethodsForWeb {
  private Floats() {}

  /**
   * The number of bytes required to represent a primitive {@code float} value.
   *
   * <p><b>Java 8+ users:</b> use {@link Float#BYTES} instead.
   *
   * @since 10.0
   */
  public static final int BYTES = Float.SIZE / Byte.SIZE;

  /**
   * Returns a hash code for {@code value}; equal to the result of invoking {@code ((Float)

public final class Floats extends FloatsMethodsForWeb {
  private Floats() {}

  /**
   * The number of bytes required to represent a primitive {@code float} value.
   *
   * <p><b>Java 8+ users:</b> use {@link Float#BYTES} instead.
   *
   * @since 10.0
   */
  public static final int BYTES = Float.SIZE / Byte.SIZE;

  /**
   * Returns a hash code for {@code value}; equal to the result of invoking {@code ((Float)

}

type bufPool struct {
	sz   int
	pool sync.Pool
}

func (b *bufPool) Put(buf []byte) {
	if cap(buf) < b.sz || cap(buf) > b.sz*2 {
		// Buffer too small or will likely leak memory after being expanded.
		// Drop it.
		return
	}
	b.pool.Put(&buf)
}

func (b *bufPool) Get() []byte {
	bufp := b.pool.Get().(*[]byte)
	return (*bufp)[:b.sz]
}

func newBufPool(sz int) httputil.BufferPool {

    }


    @Override
    protected int writeParameterWordsWireFormat ( byte[] dst, int dstIndex ) {
        return 0;
    }


    @Override
    protected int writeBytesWireFormat ( byte[] dst, int dstIndex ) {
        return 0;
    }


    @Override
    protected int readParameterWordsWireFormat ( byte[] buffer, int bufferIndex ) {
        return 0;
    }


    @Override

    assertThrows(IllegalArgumentException.class, () -> PairedStats.fromByteArray(new byte[0]));
  }

  public void testFromByteArray_withTooLongArrayInputThrowsIllegalArgumentException() {
    byte[] buffer = MANY_VALUES_PAIRED_STATS.toByteArray();
    byte[] tooLongByteArray =
        ByteBuffer.allocate(buffer.length + 2)
            .order(ByteOrder.LITTLE_ENDIAN)