## Alternative API-Dokumentation { #alternative-api-docs }

Sie können auch auf <a href="http://192.168.99.100/redoc" class="external-link" target="_blank">http://192.168.99.100/redoc</a> oder <a href="http://127.0.0.1/redoc" class="external-link" target="_blank">http://127.0.0.1/redoc</a> gehen (oder ähnlich, unter Verwendung Ihres Docker-Hosts).

```

////

//// tab | Python 3.9+

```Python hl_lines="1  4"
{!> ../../docs_src/python_types/tutorial009_py39.py!}
```

////

//// tab | Python 3.9+ alternative

```Python hl_lines="1  4"
{!> ../../docs_src/python_types/tutorial009b_py39.py!}
```

////

#### Using `Union` or `Optional` { #using-union-or-optional }

    assertThat(okHttpCertificate.tbsCertificate.validity).isEqualTo(Validity(-1000L, 2000L))
    assertThat(okHttpCertificate.tbsCertificate.serialNumber).isEqualTo(BigInteger("17"))
  }

  @Test
  fun `missing subject alternative names`() {
    val certificate =
      HeldCertificate
        .Builder()
        .certificateAuthority(3)
        .commonName("Jurassic Park")
        .organizationalUnit("Gene Research")

* <a href="https://www.slant.co/options/34241/~fastapi-review" class="external-link" target="_blank">Голосуйте за **FastAPI** в Slant</a>.
* <a href="https://alternativeto.net/software/fastapi/about/" class="external-link" target="_blank">Голосуйте за **FastAPI** в AlternativeTo</a>.
* <a href="https://stackshare.io/pypi-fastapi" class="external-link" target="_blank">Расскажите, что Вы используете **FastAPI** на StackShare</a>.

# Request e classe APIRoute personalizadas { #custom-request-and-apiroute-class }

Em alguns casos, você pode querer sobrescrever a lógica usada pelas classes `Request` e `APIRoute`.

Em particular, isso pode ser uma boa alternativa para uma lógica em um middleware.

Por exemplo, se você quiser ler ou manipular o corpo da requisição antes que ele seja processado pela sua aplicação.

/// danger | Cuidado

Isso é um recurso "avançado".

# Clase personalizada de Request y APIRoute { #custom-request-and-apiroute-class }

En algunos casos, puede que quieras sobrescribir la lógica utilizada por las clases `Request` y `APIRoute`.

En particular, esta puede ser una buena alternativa a la lógica en un middleware.

Por ejemplo, si quieres leer o manipular el request body antes de que sea procesado por tu aplicación.

/// danger | Advertencia

Esta es una funcionalidad "avanzada".

        Doc(
            """
            Load and use Google Fonts.
            """
        ),
    ] = True,
) -> HTMLResponse:
    """
    Generate and return the HTML response that loads ReDoc for the alternative
    API docs (normally served at `/redoc`).

    You would only call this function yourself if you needed to override some parts,
    for example the URLs to use to load ReDoc's JavaScript and CSS.

Other HTTP libraries exist that fill that gap allowing extensive customisation including potentially
invalid requests.

Example Limitations

* Does not allow GET with a body.
* Cache is not an interface with alternative implementations.

Get a URL
---------

This program downloads a URL and prints its contents as a string. [Full source][get_example].

```java
OkHttpClient client = new OkHttpClient();

Ela é importada/incluída diretamente no FastAPI para que você possa importá-la de `fastapi` e evitar importar acidentalmente a alternativa `BackgroundTask` (sem o `s` no final) de `starlette.background`.

 *
 * <ul>
 *   <li>The raw {@code long} values returned by {@code nanoTime} are meaningless and unsafe to use
 *       in any other way than how {@code Stopwatch} uses them.
 *   <li>An alternative source of nanosecond ticks can be substituted, for example for testing or
 *       performance reasons, without affecting most of your code.
 * </ul>
 *