## 处理断开连接和多个客户端 { #handling-disconnections-and-multiple-clients }

当 WebSocket 连接关闭时，`await websocket.receive_text()` 将引发 `WebSocketDisconnect` 异常，您可以捕获并处理该异常，就像本示例中的示例一样。

{* ../../docs_src/websockets_/tutorial003_py310.py hl[79:81] *}

尝试以下操作：

* 使用多个浏览器选项卡打开应用程序。
* 从这些选项卡中发送消息。
* 然后关闭其中一个选项卡。

这将引发 `WebSocketDisconnect` 异常，并且所有其他客户端都会收到类似以下的消息：

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

/// tip

 * Provides common functionality for handling initialization parameters,
 * content length checks, and default method implementations.
 * It defines the basic structure and configuration options for crawler clients.
 */
public abstract class AbstractCrawlerClient implements CrawlerClient {

    private static final Logger logger = LogManager.getLogger(AbstractCrawlerClient.class);

## 處理斷線與多個用戶端 { #handling-disconnections-and-multiple-clients }

當 WebSocket 連線關閉時，`await websocket.receive_text()` 會拋出 `WebSocketDisconnect` 例外，你可以像範例中那樣捕捉並處理。

{* ../../docs_src/websockets_/tutorial003_py310.py hl[79:81] *}

試用方式：

* 用多個瀏覽器分頁開啟該應用。
* 從每個分頁傳送訊息。
* 然後關閉其中一個分頁。

這會引發 `WebSocketDisconnect` 例外，其他所有用戶端都會收到類似以下的訊息：

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

/// tip

[kubernetes-client-linux-386.tar.gz](https://dl.k8s.io/v1.8.15/kubernetes-client-linux-386.tar.gz) | `31000c9ff4619139f59d8e1221d95b0d4f9a58a8dae4fadf2b64bab8712708cf`
[kubernetes-client-linux-amd64.tar.gz](https://dl.k8s.io/v1.8.15/kubernetes-client-linux-amd64.tar.gz) | `8cbb0ab062dde282f77f56f551519f6e80ed6090e112927eadb77d87a4b94477`

Es gibt jedoch bestimmte Fälle, in denen es nützlich ist, auf das `Request`-Objekt zuzugreifen.

## Das `Request`-Objekt direkt verwenden { #use-the-request-object-directly }

Angenommen, Sie möchten auf die IP-Adresse/den Host des Clients in Ihrer *Pfadoperation-Funktion* zugreifen.

Dazu müssen Sie direkt auf den Request zugreifen.

{* ../../docs_src/using_request_directly/tutorial001_py310.py hl[1,7:8] *}

     * other SMB clients (including other threads making calls into jCIFS)
     * will not be permitted to access the target file and will receive "The
     * file is being accessed by another process" message.
     */
    int FILE_NO_SHARE = 0x00;
    /**
     * When specified as the <code>shareAccess</code> constructor parameter,
     * other SMB clients will be permitted to read from the target file while

[kubernetes-client-linux-386.tar.gz](https://dl.k8s.io/v1.9.10/kubernetes-client-linux-386.tar.gz) | `a6c9bdb3e1b70f4c44461596124262464988f167da3acc00a5d50b853e725daa`
[kubernetes-client-linux-amd64.tar.gz](https://dl.k8s.io/v1.9.10/kubernetes-client-linux-amd64.tar.gz) | `94da1929a9ef1129cf23b85b690effeca1e1029696ed4e174b1c47747e6e40e2`

[kubernetes-client-linux-386.tar.gz](https://dl.k8s.io/v1.10.8/kubernetes-client-linux-386.tar.gz) | `aa4710010d16287335f90e58e417748238cd6a24c7e3ec46acb04b49582e8089`
[kubernetes-client-linux-amd64.tar.gz](https://dl.k8s.io/v1.10.8/kubernetes-client-linux-amd64.tar.gz) | `925594f5e3b062323701e3d751b2a4fbd5aa7f48f5e6271b6b9aa8280dee7e7b`

# Request Body { #request-body }

When you need to send data from a client (let's say, a browser) to your API, you send it as a **request body**.

A **request** body is data sent by the client to your API. A **response** body is the data your API sends to the client.

	writeSuccessResponseXML(w, encodedSuccessResponse)
}

// AssumeRoleWithCertificate implements user authentication with client certificates.
// It verifies the client-provided X.509 certificate, maps the certificate to an S3 policy
// and returns temp. S3 credentials to the client.
//
// API endpoint: https://minio:9000?Action=AssumeRoleWithCertificate&Version=2011-06-15