log.warn("Failed to recover channel {}: {}", channel.getChannelId(), e.getMessage());

            // Schedule next retry or remove
            handleFailure(channel, e);
        }
    }

    private void attemptRecoveryWithTransport(ChannelInfo channel, FailoverState state, SmbTransport newTransport) {
        try {
            log.info("Attempting to recover channel {}", channel.getChannelId());

            "type" : "integer"
          },
          "queryPageSize" : {
            "type" : "integer"
          },
          "queryTime" : {
            "type" : "long"
          },
          "referer" : {
            "type" : "keyword"
          },
          "requestedAt" : {
            "type" : "date",
            "format" : "date_optional_time"
          },
          "responseTime" : {

<span style="color: green;">INFO</span>:     Uvicorn running on http://127.0.0.1:8000 (Press CTRL+C to quit)
```

</div>

Então, se você acessar as URLs em `/openapi.json`, `/docs` ou `/redoc`, você receberá apenas um erro `404 Não Encontrado` como:

```JSON
{
    "detail": "Not Found"
}

# Form Data

Cuando necesitas recibir campos de formulario en lugar de JSON, puedes usar `Form`.

/// info | Información

Para usar forms, primero instala <a href="https://github.com/Kludex/python-multipart" class="external-link" target="_blank">`python-multipart`</a>.

Asegúrate de crear un [entorno virtual](../virtual-environments.md){.internal-link target=_blank}, activarlo, y luego instalarlo, por ejemplo:

```console
$ pip install python-multipart

            false, "Long", 0, 0, null, null, false, null, null, null, null, null, false);
    protected final ColumnInfo _columnReferer = cci("referer", "referer", null, null, String.class, "referer", null, false, false, false,
            "keyword", 0, 0, null, null, false, null, null, null, null, null, false);

```Python
{"id": id}
```

Por exemplo, dado um ID de valor `42`, aparecerá:

```html
Item ID: 42
```

### Argumentos do `url_for`

Você também pode usar `url_for()` dentro do template, ele recebe como argumentos os mesmos argumentos que seriam usados pela sua *path operation function*.

Logo, a seção com:

{% raw %}

```jinja
<a href="{{ url_for('read_item', id=id) }}">
```

{% endraw %}

  }

  for (header in headers.orEmpty()) {
    val parts = header.split(':', limit = 2)
    if (!isSpecialHeader(parts[0])) {
      request.header(parts[0], parts[1])
    }
  }
  referer?.let {
    request.header("Referer", it)
  }
  request.header("User-Agent", userAgent)

  return request.build()
}

private fun Main.mediaType(): MediaType? {
  val mimeType =
    headers?.let {

      }
    }
  }

  /**
   * Report and attempt to recover from a failure to communicate with a server. Returns true if
   * `e` is recoverable, or false if the failure is permanent. Requests with a body can only
   * be recovered if the body is buffered or if the failure occurred before the request has been
   * sent.
   */
  private fun recover(
    e: IOException,
    call: RealCall,
    userRequest: Request,

  val showHttp2Frames: Boolean by option("--frames").help("Log HTTP/2 frames to STDERR").flag()

  val referer: String? by option("-e", "--referer").help("Referer URL")

  val verbose: Boolean by option("-v", "--verbose").help("Makes $NAME verbose during the operation").flag()

  val sslDebug: Boolean by option("--sslDebug").help("Output SSL Debug").flag()

</div>

## Prohibir Parámetros Query Extras

En algunos casos de uso especiales (probablemente no muy comunes), podrías querer **restringir** los parámetros query que deseas recibir.

Puedes usar la configuración del modelo de Pydantic para `forbid` cualquier campo `extra`:

{* ../../docs_src/query_param_models/tutorial002_an_py310.py hl[10] *}