Чтобы создать *операцию пути* для обратного вызова, используйте тот же `APIRouter`, который вы создали выше.

Она должна выглядеть как обычная *операция пути* FastAPI:

* Вероятно, в ней должно быть объявление тела запроса, например `body: InvoiceEvent`.
* А также может быть объявление модели ответа, например `response_model=InvoiceEventReceived`.

{* ../../docs_src/openapi_callbacks/tutorial001_py310.py hl[14:16,19:20,26:30] *}

Importe `File` e `UploadFile` de `fastapi`:

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

## Definir Parâmetros `File` { #define-file-parameters }

Crie parâmetros de arquivo da mesma forma que você faria para `Body` ou `Form`:

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

/// info | Informação

`File` é uma classe que herda diretamente de `Form`.

      for (int i = 0; i < responseHeaders.size(); i++) {
        System.out.println(responseHeaders.name(i) + ": " + responseHeaders.value(i));
      }

      System.out.println(response.body().string());
    }
  }

  public static void main(String... args) throws Exception {
    new SynchronousGet().run();
  }

 * limitations under the License.
 */
package okhttp3.internal

import java.io.EOFException
import okio.BufferedSource

/**
 * Returns true if the body in question probably contains human-readable text. Uses a small
 * sample of code points to detect Unicode control characters commonly used in binary file
 * signatures.
 *

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)

* `extra`: `Mr. Poopybutthole`

То в ответ он получит **ошибку**, сообщающую ему, что поле `extra` не разрешено:

```json
{
    "detail": [
        {
            "type": "extra_forbidden",
            "loc": ["body", "extra"],
            "msg": "Extra inputs are not permitted",
            "input": "Mr. Poopybutthole"
        }
    ]
}
```

## Итоги { #summary }

    logging.info("Pushing branch")
    subprocess.run(["git", "push", "origin", branch_name], check=True)
    logging.info("Creating PR")
    pr = r.create_pull(title=message, body=message, base="master", head=branch_name)
    logging.info(f"Created PR: {pr.number}")
    logging.info("Finished")


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