///

## Aguarde mensagens e envie mensagens { #await-for-messages-and-send-messages }

Em sua rota WebSocket você pode esperar (`await`) por mensagens e enviar mensagens.

{* ../../docs_src/websockets_/tutorial001_py310.py hl[48:52] *}

Você pode receber e enviar dados binários, de texto e JSON.

* `read(size)`：讀取檔案的 `size` (`int`) 個位元組/字元。
* `seek(offset)`：移動到檔案中的位元組位置 `offset` (`int`)。
    * 例如，`await myfile.seek(0)` 會移到檔案開頭。
    * 當你已經執行過 `await myfile.read()`，之後需要再次讀取內容時特別有用。
* `close()`：關閉檔案。

由於這些都是 `async` 方法，你需要以 await 呼叫它們。

例如，在 `async` 的路徑操作函式中可這樣讀取內容：

```Python
contents = await myfile.read()
```

若是在一般的 `def` 路徑操作函式中，你可以直接存取 `UploadFile.file`，例如：

```Python

      @Override
      public Class<?> loadClass(String name) throws ClassNotFoundException {
        if (disallowedClassNames.contains(name)) {
          throw new ClassNotFoundException("I'm sorry Dave, I'm afraid I can't do that.");
        }
        if (name.startsWith(concurrentPackage)) {
          Class<?> c = findLoadedClass(name);
          if (c == null) {
            return super.findClass(name);
          }

Dans ce cas, le chemin original `/app` serait en réalité servi à `/api/v1/app`.

Même si tout votre code est écrit en supposant qu'il n'y a que `/app`.

{* ../../docs_src/behind_a_proxy/tutorial001_py310.py hl[6] *}

	"github.com/minio/minio/internal/logger/target/http"
	"github.com/minio/minio/internal/logger/target/kafka"
)

// Console logger target
type Console struct {
	Enabled bool `json:"enabled"`
}

// Audit/Logger constants
const (
	Endpoint      = "endpoint"
	AuthToken     = "auth_token"
	ClientCert    = "client_cert"
	ClientKey     = "client_key"
	BatchSize     = "batch_size"
	QueueSize     = "queue_size"

/// note | 技术细节

您也可以使用 `from starlette.websockets import WebSocket`。

**FastAPI** 直接提供了相同的 `WebSocket`，只是为了方便开发人员。但它直接来自 Starlette。

///

## 等待消息并发送消息 { #await-for-messages-and-send-messages }

在您的 WebSocket 路由中，您可以使用 `await` 等待消息并发送消息。

{* ../../docs_src/websockets_/tutorial001_py310.py hl[48:52] *}

您可以接收和发送二进制、文本和 JSON 数据。

## 尝试一下 { #try-it }

将代码放在 `main.py`，然后运行你的应用程序：

* `read(size)`: Lê `size` (`int`) bytes/caracteres do arquivo.
* `seek(offset)`: Vai para o byte na posição `offset` (`int`) no arquivo.
    * Por exemplo, `await myfile.seek(0)` irá para o início do arquivo.
    * Isso é especialmente útil se você executar `await myfile.read()` uma vez e precisar ler o conteúdo novamente.
* `close()`: Fecha o arquivo.

Como todos esses métodos são métodos `assíncronos`, você precisa "aguardar" por eles.

                                        with anyio.fail_after(_PING_INTERVAL):
                                            data = await receive_stream.receive()
                                        await send_keepalive.send(data)
                                    except TimeoutError:
                                        await send_keepalive.send(KEEPALIVE_COMMENT)
                            except anyio.EndOfStream:

  `What do you mean by that?' said the Caterpillar sternly.
`Explain yourself!'

  `I can't explain MYSELF, I'm afraid, sir' said Alice, `because
I'm not myself, you see.'

  `I don't see,' said the Caterpillar.

  `I'm afraid I can't put it more clearly,' Alice replied very
politely, `for I can't understand it myself to begin with; and

Néanmoins, nous pouvons déclarer le schéma attendu pour le corps de la requête.

### Type de contenu OpenAPI personnalisé { #custom-openapi-content-type }