## OpenAPI y documentación de API

Si quieres devolver códigos de estado y respuestas adicionales directamente, estas no estarán incluidas en el schema de OpenAPI (documentación de API), porque FastAPI no tiene una manera de conocer de antemano lo que vas a devolver.

Todos los bloques de código se pueden copiar y usar directamente (en realidad son archivos Python probados).

Para ejecutar cualquiera de los ejemplos, copia el código en un archivo llamado `main.py`, y ejecuta `uvicorn` de la siguiente manera en tu terminal:

<div class="termy">

```console
$ uvicorn main:app --reload

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

* **Sin comprometerse** con bases de datos, frontend, etc. Pero permitiendo integración fácil con todos ellos.

### "Plug-ins" ilimitados

O dicho de otra manera, no hay necesidad para "plug-ins". Importa y usa el código que necesites.

   *
   * The [dispatcher][OkHttpClient.dispatcher] defines when the request will run: usually
   * immediately unless there are several other requests currently being executed.
   *
   * This client will later call back `responseCallback` with either an HTTP response or a failure
   * exception.
   *
   * @throws IllegalStateException when the call has already been executed.
   */
  fun enqueue(responseCallback: Callback)

The `security_scopes` object (of class `SecurityScopes`) also provides a `scope_str` attribute with a single string, containing those scopes separated by spaces (we are going to use it).

We create an `HTTPException` that we can re-use (`raise`) later at several points.

          invokeStartEvent = false
        }
        if (responseBuilder == null) {
          if (requestBody.isDuplex()) {
            // Prepare a duplex body so that the application can send a request body later.
            exchange.flushRequest()
            val bufferedRequestBody = exchange.createRequestBody(request, true).buffer()
            requestBody.writeTo(bufferedRequestBody)
          } else {

  private var nextQueueName = 10000
  private var coordinatorWaiting = false
  private var coordinatorWakeUpAt = 0L

  /**
   * When we need a new thread to run tasks, we call [Backend.execute]. A few microseconds later we
   * expect a newly-started thread to call [Runnable.run]. We shouldn't request new threads until
   * the already-requested ones are in service, otherwise we might create more threads than we need.
   *

   * }
   * ```
   *
   * RFC 5280, section 4.1.2.5:
   *
   * > CAs conforming to this profile MUST always encode certificate validity dates through the year
   * > 2049 as UTCTime; certificate validity dates in 2050 or later MUST be encoded as
   * > GeneralizedTime.
   */
  internal val time: DerAdapter<Long> =
    object : DerAdapter<Long> {
      override fun matches(header: DerHeader): Boolean {

#### Endpoints

Endpoints have an optimized code path, as they are by far the most frequently updated resource - in a steady cluster, this will often be the *only* change, caused by scale up/down.

Library as you received it specifies that a certain numbered version
of the GNU Lesser General Public License "or any later version"
applies to it, you have the option of following the terms and
conditions either of that published version or of any later version
published by the Free Software Foundation. If the Library as you
received it does not specify a version number of the GNU Lesser