from fastapi import FastAPI, File, UploadFile
from fastapi.responses import HTMLResponse

app = FastAPI()


@app.post("/files/")
async def create_files(
    files: list[bytes] = File(description="Multiple files as bytes"),
):
    return {"file_sizes": [len(file) for file in files]}


@app.post("/uploadfiles/")
async def create_upload_files(
    files: list[UploadFile] = File(description="Multiple files as UploadFile"),
):

In this example, we didn't declare any Pydantic model. In fact, the request body is not even <dfn title="converted from some plain format, like bytes, into Python objects">parsed</dfn> as JSON, it is read directly as `bytes`, and the function `magic_data_reader()` would be in charge of parsing it in some way.

Nevertheless, we can declare the expected schema for the request body.

   * threshold"). (We then write some more afterward.) This differs from the existing
   * testThreshold() which writes exactly enough bytes to fill the buffer, then immediately writes
   * more bytes.
   *
   * <p>Note: Direct testing of the {@link IOException} scenario during write/flush is challenging

 * prefix are called a 'section'. There are 128 code points per section.
 *
 * Ranges Data (32,612 bytes)
 * ==========================
 *
 * Each entry is 4 bytes, and represents a _range_ of code points that all share a common 14-bit
 * prefix. Entries are sorted by their complete code points.
 *
 * The 4 bytes are named b0, b1, b2 and b3. We also define these supplemental values:
 *
 *  * **b2a**: b2 + 0x80

        byte[] fileId = new byte[16];
        for (int i = 0; i < fileId.length; i++)
            fileId[i] = (byte) (i + 1);

        byte[] header = buildSmb2Header();
        byte[] body = buildCreateBodyNoContexts((byte) 0x7, (byte) 0x2, 0x11223344, 1111L, 2222L, 3333L, 4444L, 123456789L, 987654321L,
                0xA5A5A5A5, fileId);
        byte[] packet = buildPacket(header, body, null, null);

		}
		if key.Plaintext != nil {
			t.Fatalf("Test %d: unmarshaled DEK contains non-nil plaintext", i)
		}
		if !bytes.Equal(key.Ciphertext, test.Key.Ciphertext) {
			t.Fatalf("Test %d: ciphertext mismatch: got %x - want %x", i, key.Ciphertext, test.Key.Ciphertext)
		}
	}
}

func mustDecodeB64(s string) []byte {
	b, err := base64.StdEncoding.DecodeString(s)
	if err != nil {
		panic(err)
	}
	return b

*path operation 関数* のパラメータの型を `bytes` として宣言すると、**FastAPI** がファイルを読み取り、内容を `bytes` として受け取ります。

これは内容全体がメモリに保持されることを意味します。小さなファイルには有効です。

しかし、多くの場合は `UploadFile` を使う方が有利です。

## `UploadFile` によるファイルパラメータ { #file-parameters-with-uploadfile }

型を `UploadFile` にしてファイルパラメータを定義します:

{* ../../docs_src/request_files/tutorial001_an_py310.py hl[14] *}

`UploadFile` を使うことには `bytes` に対する次の利点があります:

			"Total number of internode bytes received by current MinIO server instance",
			nil, nil),
		prometheus.CounterValue,
		float64(connStats.internodeInputBytes),
	)

	// Network Sent/Received Bytes (Outbound)
	ch <- prometheus.MustNewConstMetric(
		prometheus.NewDesc(
			prometheus.BuildFQName(s3Namespace, "tx", "bytes_total"),
			"Total number of s3 bytes sent by current MinIO server instance",
			nil, nil),

    /**
     * SMB command to rename a file.
     */
    public static final byte SMB_COM_RENAME = (byte) 0x07;

    /**
     * SMB command to query file information.
     */
    public static final byte SMB_COM_QUERY_INFORMATION = (byte) 0x08;

    /**
     * SMB command to set file information.
     */
    public static final byte SMB_COM_SET_INFORMATION = (byte) 0x09;

            // Check bytes before written area are unchanged
            for (int i = 0; i < startIndex; i++) {
                assertEquals((byte) 0xFF, buffer[i]);
            }

            // Check bytes after written area are unchanged
            for (int i = startIndex + 4; i < buffer.length; i++) {
                assertEquals((byte) 0xFF, buffer[i]);
            }
        }

        @Test