public class UnsignedBytesBenchmark {

  private byte[] ba1;
  private byte[] ba2;
  private byte[] ba3;
  private byte[] ba4;
  private Comparator<byte[]> javaImpl;
  private Comparator<byte[]> unsafeImpl;

  // 4, 8, 64, 1K, 1M, 1M (unaligned), 64M, 64M (unaligned)
  // @Param({"4", "8", "64", "1024", "1048576", "1048577", "6710884", "6710883"})
  @Param({"4", "8", "64", "1024"})
  private int length;

  @BeforeExperiment

public class UnsignedBytesBenchmark {

  private byte[] ba1;
  private byte[] ba2;
  private byte[] ba3;
  private byte[] ba4;
  private Comparator<byte[]> javaImpl;
  private Comparator<byte[]> unsafeImpl;

  // 4, 8, 64, 1K, 1M, 1M (unaligned), 64M, 64M (unaligned)
  // @Param({"4", "8", "64", "1024", "1048576", "1048577", "6710884", "6710883"})
  @Param({"4", "8", "64", "1024"})
  private int length;

  @BeforeExperiment

   *         .<City, Distance>immutable()
   *         .putEdgeValue(PARIS, BERLIN, kilometers(1060))
   *         .putEdgeValue(PARIS, BRUSSELS, kilometers(317))
   *         .putEdgeValue(BERLIN, BRUSSELS, kilometers(764))
   *         .addNode(REYKJAVIK)
   *         .build();
   * }</pre>
   *
   * <p>Builder instances can be reused; it is safe to call {@link #build} multiple times to build

🔜 ➡️ ⚙️ 🚙 🚚 **FastAPI** 🍵 👉.

### `OAuth2PasswordRequestForm`

🥇, 🗄 `OAuth2PasswordRequestForm`, & ⚙️ ⚫️ 🔗 ⏮️ `Depends` *➡ 🛠️* `/token`:

//// tab | 🐍 3️⃣.6️⃣ & 🔛

```Python hl_lines="4  76"
{!> ../../docs_src/security/tutorial003.py!}
```

////

//// tab | 🐍 3️⃣.1️⃣0️⃣ & 🔛

```Python hl_lines="2  74"
{!> ../../docs_src/security/tutorial003_py310.py!}
```

////

///

## 获取 `username` 和 `password` 的代码

接下来，使用 **FastAPI** 工具获取用户名与密码。

### `OAuth2PasswordRequestForm`

首先，导入 `OAuth2PasswordRequestForm`，然后，在 `/token` *路径操作* 中，用 `Depends` 把该类作为依赖项。

```Python hl_lines="4  76"
{!../../docs_src/security/tutorial003.py!}
```

`OAuth2PasswordRequestForm` 是用以下几项内容声明表单请求体的类依赖项：

* `username`
* `password`
* 可选的 `scope` 字段，由多个空格分隔的字符串组成的长字符串
* 可选的 `grant_type`

/// tip | "提示"