```

在浏览器中打开 <a href="http://127.0.0.1:8000" class="external-link" target="_blank">http://127.0.0.1:8000</a>。

在页面中，您可以设置：

* "Item ID"，用于路径。
* "Token"，作为查询参数。

/// tip

注意，查询参数 `token` 将由依赖项处理。

///

通过这样，您可以连接 WebSocket，然后发送和接收消息：

<img src="/img/tutorial/websockets/image05.png">

## 处理断开连接和多个客户端

 *  Fix: Reliably update and invalidate the disk cache on windows. As originally designed our
    internal `DiskLruCache` assumes an inode-like file system, where it's fine to delete files that
    are currently being read or written. On Windows the file system forbids this so we must be more
    careful when deleting and renaming files.

 *  Fix: Don't crash on Java 8u252 which introduces an API previously found only on Java 9 and

///

Зробивши це, ваш редактор може надати підтримку навіть під час обробки елементів зі списку:

<img src="/img/python-types/image05.png">

Без типів цього майже неможливо досягти.

Зверніть увагу, що змінна `item` є одним із елементів у списку `items`.

І все ж редактор знає, що це `str`, і надає підтримку для цього.

#### Tuple and Set (кортеж та набір)

Ви повинні зробити те ж саме, щоб оголосити `tuple` і `set`:

## 生成一个 TypeScript 前端客户端

让我们从一个简单的 FastAPI 应用开始：

{* ../../docs_src/generate_clients/tutorial001_py39.py hl[7:9,12:13,16:17,21] *}

请注意，*路径操作* 定义了他们所用于请求数据和回应数据的模型，所使用的模型是`Item` 和 `ResponseMessage`。

### API 文档

如果您访问API文档，您将看到它具有在请求中发送和在响应中接收数据的**模式(schemas)**：

<img src="/img/tutorial/generate-clients/image01.png">

您可以看到这些模式，因为它们是用程序中的模型声明的。

        serverData.signaturesEnabled = true;
        serverData.signaturesRequired = false;
        serverData.maxNumberVcs = 1;
        serverData.maxRawSize = 65536;
        serverData.serverTime = System.currentTimeMillis();
        serverData.serverTimeZone = -480; // PST
        serverData.encryptionKeyLength = 8;
        serverData.encryptionKey = new byte[] { 0x11, 0x22, 0x33, 0x44, 0x55, 0x66, 0x77, (byte) 0x88 };

        // Create target information with timestamp for NTLMv2
        List<AvPair> pairs = new LinkedList<>();
        pairs.add(new AvTargetName("TARGET"));
        pairs.add(new AvTimestamp(System.currentTimeMillis()));
        pairs.add(new AvFlags(0));
        pairs.add(new AvSingleHost(new byte[48])); // Dummy single host data

        type2.setTargetInformation(AvPairs.encode(pairs));

        int total = 0;
        for (byte[] a : arrays) {
            total += a.length;
        }
        byte[] res = new byte[total];
        int off = 0;
        for (byte[] a : arrays) {
            System.arraycopy(a, 0, res, off, a.length);
            off += a.length;
        }
        return res;
    }

    @Test
    @DisplayName("Read single bytes from stream with message packet")

        }

        if (logger.isDebugEnabled()) {
            logger.debug("Initializing SmbClient...");
        }

        super.init();

        final Properties props = new Properties();
        System.getProperties().entrySet().stream().filter(e -> e.getKey().toString().startsWith("jcifs.")).forEach(e -> {
            props.setProperty((String) e.getKey(), (String) e.getValue());
        });
        try {

 * {@code long} values. When possible, it is recommended that the {@link UnsignedLong} wrapper class
 * be used, at a small efficiency penalty, to enforce the distinction in the type system.
 *
 * <p>See the Guava User Guide article on <a
 * href="https://github.com/google/guava/wiki/PrimitivesExplained#unsigned-support">unsigned
 * primitive utilities</a>.
 *
 * @author Louis Wasserman

All this renewal process, while still serving the app, is one of the main reasons why you would want to have a **separate system to handle HTTPS** with a TLS Termination Proxy instead of just using the TLS certificates with the application server directly (e.g. Uvicorn).

## Proxy Forwarded Headers { #proxy-forwarded-headers }