if perr != nil {
			t.Fatalf("Test %d: %s: Failed to create HTTP request for PostPolicyHandler: <ERROR> %v", i+1, instanceType, perr)
		}
		if testCase.malformedBody {
			// Change the request body.
			req.Body = io.NopCloser(bytes.NewReader([]byte("Hello,")))
		}
		// Since `apiRouter` satisfies `http.Handler` it has a ServeHTTP to execute the logic of the handler.
		// Call the ServeHTTP to execute the handler.

Імпортуйте `File` та `UploadFile` з `fastapi`:

{* ../../docs_src/request_files/tutorial001_an_py39.py hl[3] *}

## Визначення параметрів `File`

Створіть параметри файлів так само як Ви б створювали `Body` або `Form`:

{* ../../docs_src/request_files/tutorial001_an_py39.py hl[9] *}

/// info | Інформація

`File`  — це клас, який безпосередньо успадковує `Form`.

```JSON hl_lines="12-15"
{
  "detail": [
    {
      "loc": [
        "body",
        "size"
      ],
      "msg": "value is not a valid integer",
      "type": "type_error.integer"
    }
  ],
  "body": {
    "title": "towel",
    "size": "XL"
  }
}
```

#### `HTTPException` FastAPI проти `HTTPException` Starlette

    assert response.status_code == 422
    assert response.json() == {
        "detail": [
            {
                "type": "float_parsing",
                "loc": ["body", "price"],
                "msg": "Input should be a valid number, unable to parse string as a number",
                "input": "invalid price",
            }
        ]
    }

            nonlocal received
            message = await receive()
            if message["type"] != "http.request":
                return message  # pragma: no cover

            body_len = len(message.get("body", b""))
            received += body_len
            if received > self.max_content_size:
                raise HTTPException(
                    422,
                    detail={

                                    }
                                }
                            },
                        },
                    },
                    "summary": "Save Item No Body",
                    "operationId": "save_item_no_body_items__item_id__put",
                    "parameters": [
                        {
                            "required": True,

![ReDoc](https://fastapi.tiangolo.com/img/index/index-02-redoc-simple.png)

## Example upgrade { #example-upgrade }

Now modify the file `main.py` to receive a body from a `PUT` request.

Declare the body using standard Python types, thanks to Pydantic.

```Python hl_lines="4  9-12  25-27"
from typing import Union

from fastapi import FastAPI
from pydantic import BaseModel

	if err != nil {
		return key, err
	}
	err = key.Unseal(clientKey, sealedKey, SSEC.String(), bucket, object)
	return key, err
}

// EncryptSinglePart encrypts an io.Reader which must be the
// body of a single-part PUT request.
func EncryptSinglePart(r io.Reader, key ObjectKey) io.Reader {
	r, err := sio.EncryptReader(r, sio.Config{MinVersion: sio.Version20, Key: key[:]})
	if err != nil {

It would also mean that if you get data from the `Request` object directly (for example, read the body) it won't be validated, converted or documented (with OpenAPI, for the automatic API user interface) by FastAPI.

Although any other parameter declared normally (for example, the body with a Pydantic model) would still be validated, converted, annotated, etc.

	if action == policy.CreateBucketAction {
		// To extract region from XML in request body, get copy of request body.
		payload, err := io.ReadAll(io.LimitReader(r.Body, maxLocationConstraintSize))
		if err != nil {
			authZLogIf(ctx, err, logger.ErrorKind)
			return ErrMalformedXML
		}

		// Populate payload to extract location constraint.
		r.Body = io.NopCloser(bytes.NewReader(payload))
		region, s3Err = parseLocationConstraint(r)