///

### `startup` and `shutdown` together

There's a high chance that the logic for your *startup* and *shutdown* is connected, you might want to start something and then finish it, acquire a resource and then release it, etc.

Doing that in separated functions that don't share logic or variables together is more difficult as you would need to store values in global variables or similar tricks.

    This is here only to preview a site with translations already built.

    Make sure you run the build-all command first.
    """
    typer.echo("Warning: this is a very simple server.")
    typer.echo("For development, use the command live instead.")
    typer.echo("This is here only to preview a site with translations already built.")
    typer.echo("Make sure you run the build-all command first.")
    os.chdir("site")

在这种情况下，中间件将拦截传入的请求并进行响应，出于提供信息的目的返回一个使用了适当的 CORS headers 的 `200` 或 `400` 响应。

### 简单请求

任何带有 `Origin` 请求头的请求。在这种情况下，中间件将像平常一样传递请求，但是在响应中包含适当的 CORS headers。

## 更多信息

更多关于 <abbr title="Cross-Origin Resource Sharing">CORS</abbr> 的信息，请查看 <a href="https://developer.mozilla.org/en-US/docs/Web/HTTP/CORS" class="external-link" target="_blank">Mozilla CORS 文档</a>。

/// note | "技术细节"

* Modèle de démarrages basiques pour les utilisateurs (à modifier et supprimer au besoin).
* Migrations **Alembic**.
* **CORS** (partage des ressources entre origines multiples, ou *Cross Origin Resource Sharing*).
* *Worker* **Celery** pouvant importer et utiliser les modèles et le code du reste du backend.

  public static final String COOKIE = "Cookie";
  /**
   * The HTTP <a href="https://fetch.spec.whatwg.org/#cross-origin-resource-policy-header">{@code
   * Cross-Origin-Resource-Policy}</a> header field name.
   *
   * @since 28.0
   */
  public static final String CROSS_ORIGIN_RESOURCE_POLICY = "Cross-Origin-Resource-Policy";

  /**
   * The HTTP <a href="https://datatracker.ietf.org/doc/html/rfc8470">{@code Early-Data}</a> header

{!../../docs_src/middleware/tutorial001.py!}
```

## その他のミドルウェア

他のミドルウェアの詳細については、[高度なユーザーガイド: 高度なミドルウェア](../advanced/middleware.md){.internal-link target=_blank}を参照してください。

* Modelos básicos para usuários (modifique e remova conforme suas necessidades).
* Migrações **Alembic**.
* **CORS** (_Cross Origin Resource Sharing_ - Compartilhamento de Recursos Entre Origens).
* _Worker_ **Celery** que pode importar e usar modelos e códigos do resto do _backend_ seletivamente.

```
http://127.0.0.1:8000/items/foo-item?needy=sooooneedy
```

...this would work:

```JSON
{
    "item_id": "foo-item",
    "needy": "sooooneedy"
}
```

And of course, you can define some parameters as required, some as having a default value, and some entirely optional:

//// tab | Python 3.10+

```Python hl_lines="8"
{!> ../../docs_src/query_params/tutorial006_py310.py!}
```

func (h *metricsV3Server) handle(path string, isListingRequest bool, buckets []string) http.Handler {
	var notFoundHandler http.Handler = http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		http.Error(w, "Metrics Resource Not found", http.StatusNotFound)
	})

	// Require that metrics path has one component at least.
	if path == "/" {
		return notFoundHandler
	}

	if isListingRequest {
		handler := h.listMetrics(path)

    }


    /**
     * 
     * {@inheritDoc}
     *
     * @see jcifs.smb.SmbPipeHandleInternal#sendrecv(byte[], int, int, byte[], int)
     */
    @SuppressWarnings ( "resource" )
    @Override
    public int sendrecv ( byte[] buf, int off, int length, byte[] inB, int maxRecvSize ) throws IOException {
        try ( SmbFileHandleImpl fh = ensureOpen();