試してみるには、

* いくつかのブラウザタブでアプリを開きます。
* それらのタブでメッセージを記入してください。
* そして、タブのうち1つを閉じてください。

これにより例外 `WebSocketDisconnect` が発生し、他のすべてのクライアントは次のようなメッセージを受信します。

```
Client #1596980209979 left the chat
```

/// tip | 豆知識

上記のアプリは、複数の WebSocket 接続に対してメッセージを処理し、ブロードキャストする方法を示すための最小限のシンプルな例です。

しかし、すべての接続がメモリ内の単一のリストで処理されるため、プロセスの実行中にのみ機能し、単一のプロセスでのみ機能することに注意してください。

			if ok {
				for _, kv := range kvs {
					if sset.Contains(kv.Key) {
						// Reject duplicate conditions or expiration.
						return nil, fmt.Errorf("input policy has multiple %s, please fix your client code", kv.Key)
					}
					sset.Add(kv.Key)
				}
			}
			e.Encode(kvs)
		}
	}
	return &buf, d.Err()
}

// parsePostPolicyForm - Parse JSON policy string into typed PostPolicyForm structure.

Volviendo al ejemplo de código anterior, **FastAPI**:

* Validará que haya un `item_id` en el path para requests `GET` y `PUT`.
* Validará que el `item_id` sea del tipo `int` para requests `GET` y `PUT`.
    * Si no lo es, el cliente verá un error útil y claro.
* Comprobará si hay un parámetro de query opcional llamado `q` (como en `http://127.0.0.1:8000/items/foo?q=somequery`) para requests `GET`.

/* jcifs smb client library in Java
 * Copyright (C) 2000  "Michael B. Allen" <jcifs at samba dot org>
 *                     "Paul Walker" <jcifs at samba dot org>
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *

/* jcifs smb client library in Java
 * Copyright (C) 2000  "Michael B. Allen" <jcifs at samba dot org>
 *                     "Christopher R. Hertel" <jcifs at samba dot org>
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *

		return
	}

	if withUpdatedAt {
		w.Header().Set(xhttp.MinIOLifecycleCfgUpdatedAt, updatedAt.Format(iso8601Format))
	}
	// Write lifecycle configuration to client.
	writeSuccessResponseXML(w, configData)
}

// DeleteBucketLifecycleHandler - This HTTP handler removes bucket lifecycle configuration.

## Parâmetros descontinuados

Agora vamos dizer que você não queria mais utilizar um parâmetro.

Você tem que deixá-lo ativo por um tempo, já que existem clientes o utilizando. Mas você quer que a documentação deixe claro que este parâmetro será <abbr title="obsoleto, recomenda-se que não deve ser utilizado">descontinuado</abbr>.

Então você passa o parâmetro `deprecated=True` para `Query`:

/* jcifs smb client library in Java
 * Copyright (C) 2000  "Michael B. Allen" <jcifs at samba dot org>
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,

	cfgName := r.Form.Get("configName")
	allConfigs := r.Form.Get("allConfigs") == "true"
	if cfgName == "" && !allConfigs {
		cfgName = madmin.Default
	}

	if isAll && len(userList) > 0 {
		// This should be checked on client side, so return generic error
		writeErrorResponseJSON(ctx, w, errorCodes.ToAPIErr(ErrInvalidRequest), r.URL)
		return
	}

	// Empty DN list and not self, list access keys for all users
	if isAll {

unset MINIO_KMS_KES_CERT_FILE
unset MINIO_KMS_KES_KEY_FILE
unset MINIO_KMS_KES_ENDPOINT
unset MINIO_KMS_KES_KEY_NAME

if [ ! -f ./mc ]; then
	wget --quiet -O mc https://dl.minio.io/client/mc/release/linux-amd64/mc &&
		chmod +x mc
fi

minio server --address 127.0.0.1:9001 "http://127.0.0.1:9001/tmp/multisitea/data/disterasure/xl{1...4}" \