public void initResults() throws IOException {
        final BytesStreamOutput tmp = new BytesStreamOutput();
        final long bytes = new ByteSizeValue(dataMb, ByteSizeUnit.MB).getBytes();
        for (int i = 0; i < bytes / 8; i++) {
            tmp.writeLong(i);
        }
        pagedBytes = tmp.bytes();
        if (pagedBytes instanceof PagedBytesReference == false) {

            ListTestSuiteBuilder.using(new BytesAsListTailSubListGenerator())
                .named("Bytes.asList, tail subList"),
            ListTestSuiteBuilder.using(new BytesAsListMiddleSubListGenerator())
                .named("Bytes.asList, middle subList"));

    TestSuite suite = new TestSuite();
    for (ListTestSuiteBuilder<Byte> builder : builders) {
      suite.addTest(
          builder

	processIOReadBytesMD              = NewCounterMD(processIOReadBytes, "Total bytes read by the process from the underlying storage system, /proc/[pid]/io read_bytes")

app = FastAPI()


@app.post("/file_before_form")
def file_before_form(
    file: bytes = File(),
    city: str = Form(),
):
    return {"file_content": file, "city": city}


@app.post("/file_after_form")
def file_after_form(
    city: str = Form(),
    file: bytes = File(),
):
    return {"file_content": file, "city": city}


@app.post("/file_list_before_form")

class DataInput(BaseModel):
    description: str
    data: bytes

    model_config = {"val_json_bytes": "base64"}


class DataOutput(BaseModel):
    description: str
    data: bytes

    model_config = {"ser_json_bytes": "base64"}


class DataInputOutput(BaseModel):
    description: str
    data: bytes

    model_config = {
        "val_json_bytes": "base64",

///

### Antes y después de la `response` { #before-and-after-the-response }

Puedes añadir código que se ejecute con la `request`, antes de que cualquier *path operation* la reciba.

Y también después de que se genere la `response`, antes de devolverla.

    Random r = new Random(1234567);
    for (int length = 0; length < 1000; length++) {
      byte[] bytes = new byte[length];
      r.nextBytes(bytes);
      assertCrc(referenceCrc(bytes), bytes);
    }
  }

  private static int referenceCrc(byte[] bytes) {
    int crc = ~0;
    for (byte b : bytes) {
      crc = (crc >>> 8) ^ Crc32cHashFunction.Crc32cHasher.byteTable[(crc ^ b) & 0xFF];
    }
    return ~crc;

)

const (
	byteRangePrefix = "bytes="
)

// HTTPRangeSpec represents a range specification as supported by S3 GET
// object request.
//
// Case 1: Not present -> represented by a nil RangeSpec
// Case 2: bytes=1-10 (absolute start and end offsets) -> RangeSpec{false, 1, 10}
// Case 3: bytes=10- (absolute start offset with end offset unspecified) -> RangeSpec{false, 10, -1}

		b, e := io.ReadAll(r)
		if e != nil {
			return nil, e
		}
		b, _, minor, e := checkXL2V1(b)
		if e != nil {
			return nil, e
		}

		buf := bytes.NewBuffer(nil)
		var data xlMetaInlineData
		switch minor {
		case 0:
			_, e = msgp.CopyToJSON(buf, bytes.NewReader(b))
			if e != nil {
				return nil, e
			}
		case 1, 2:
			v, b, e := msgp.ReadBytesZC(b)
			if e != nil {
				return nil, e
			}

    @JvmName("create")
    fun String.toRequestBody(contentType: MediaType? = null): RequestBody {
      val (charset, finalContentType) = contentType.chooseCharset()
      val bytes = toByteArray(charset)
      return bytes.toRequestBody(finalContentType, 0, bytes.size)
    }

    @JvmStatic
    @JvmName("create")
    fun ByteString.toRequestBody(contentType: MediaType? = null): RequestBody =
      object : RequestBody() {