// SafeClose safely closes any channel of any type
func SafeClose[T any](c chan<- T) {
	if c != nil {
		close(c)
		return
	}
	// Print stack to check who is sending `c` as `nil`
	// without crashing the server.
	debug.PrintStack()

// Version returns version information about the KMS.
//
// TODO(aead): refactor this API call since it does not account
// for multiple KMS/KES servers.
func (k *KMS) Version(ctx context.Context) (string, error) {
	return k.conn.Version(ctx)
}

// APIs returns a list of KMS server APIs.
//
// TODO(aead): remove this API since it's hardly useful.
func (k *KMS) APIs(ctx context.Context) ([]madmin.KMSAPI, error) {

	dm.refreshInterval = testDrwMutexUnlockCallTimeout
	if !dm.GetLock(t.Context(), nil, id, source, Options{Timeout: 5 * time.Minute}) {
		t.Fatal("GetLock() should be successful")
	}

	// Add delay to lock server responses to ensure that lock does not timeout
	for i := range lockServers {
		lockServers[i].setResponseDelay(5 * testDrwMutexUnlockCallTimeout)
		defer lockServers[i].setResponseDelay(0)
	}

Copiez ce code dans un fichier nommé `main.py`.

Démarrez le serveur :

<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)
<span style="color: green;">INFO</span>:     Started reloader process [28720]
<span style="color: green;">INFO</span>:     Started server process [28722]

# Benutzerdefinierte Response – HTML, Stream, Datei, andere { #custom-response-html-stream-file-others }

Standardmäßig gibt **FastAPI** die <abbr title="Response – Antwort: Daten, die der Server zum anfragenden Client zurücksendet">Responses</abbr> mittels `JSONResponse` zurück.

Sie können dies überschreiben, indem Sie direkt eine `Response` zurückgeben, wie in [Eine Response direkt zurückgeben](response-directly.md){.internal-link target=_blank} gezeigt.

### Em um servidor remoto { #in-a-remote-server }

This is the case for most of the web applications.

Many, many users, but your server is waiting 🕙 for their not-so-good connection to send their requests.

And then waiting 🕙 again for the responses to come back.

The `password` "flow" is one of the ways ("flows") defined in OAuth2, to handle security and authentication.

OAuth2 was designed so that the backend or API could be independent of the server that authenticates the user.

But in this case, the same **FastAPI** application will handle the API and the authentication.

So, let's review it from that simplified point of view:

goto endHandleArgs
:handleArgs
if "%~1"=="--debug" (
    if "%MAVEN_DEBUG_OPTS%"=="" (
        set "MAVEN_DEBUG_OPTS=-Xdebug -Xrunjdwp:transport=dt_socket,server=y,suspend=y,address=%MAVEN_DEBUG_ADDRESS%"
    )
) else if "%~1"=="--yjp" (
    if not exist "%YJPLIB%" (
        echo Error: Unable to autodetect the YJP library location. Please set YJPLIB variable >&2

### Usar el `settings` { #use-the-settings }

Luego puedes usar el nuevo objeto `settings` en tu aplicación:

{* ../../docs_src/settings/tutorial001_py39.py hl[18:20] *}

### Ejecutar el servidor { #run-the-server }

Luego, ejecutarías el servidor pasando las configuraciones como variables de entorno, por ejemplo, podrías establecer un `ADMIN_EMAIL` y `APP_NAME` con:

<div class="termy">

```console