24, 21, 22, 23, 23, 21, 21, 22, 21, 23, 22, 23, 23, 20, 22, 22, 22, 23, 22, 22, 23, 26,
      26, 20, 19, 22, 23, 22, 25, 26, 26, 26, 27, 27, 26, 24, 25, 19, 21, 26, 27, 27, 26, 27,
      24, 21, 21, 26, 26, 28, 27, 27, 27, 20, 24, 20, 21, 22, 21, 21, 23, 22, 22, 25, 25, 24,
      24, 26, 23, 26, 27, 26, 26, 27, 27, 27, 27, 27, 28, 27, 27, 27, 27, 27, 26,
    )

  private val root = Node()

  init {

```Python hl_lines="2  6"
{!../../../docs_src/advanced_middleware/tutorial001.py!}
```

## `TrustedHostMiddleware`

Enforces that all incoming requests have a correctly set `Host` header, in order to guard against HTTP Host Header attacks.

```Python hl_lines="2  6-8"
{!../../../docs_src/advanced_middleware/tutorial002.py!}
```

          else -> c.code
        }
      i++
    }
    return result
  }

  private val Int.punycodeDigit: Int
    get() =
      when {
        this < 26 -> this + 'a'.code
        this < 36 -> (this - 26) + '0'.code
        else -> error("unexpected digit: $this")
      }

This method returns a function. And that function is what will receive a request and return a response.

Here we use it to create a `GzipRequest` from the original request.

```Python hl_lines="18-26"
{!../../../docs_src/custom_request_and_route/tutorial001.py!}
```

!!! note "Technical Details"
    A `Request` has a `request.scope` attribute, that's just a Python `dict` containing the metadata related to the request.

```Python hl_lines="2  6"
{!../../../docs_src/advanced_middleware/tutorial001.py!}
```

## `TrustedHostMiddleware`

Erzwingt, dass alle eingehenden Requests einen korrekt gesetzten `Host`-Header haben, um sich vor HTTP-Host-Header-Angriffen zu schützen.

```Python hl_lines="2  6-8"
{!../../../docs_src/advanced_middleware/tutorial002.py!}
```

👉 🕰, ⚫️ 🔜 📁 👩‍🔬 `APIRoute.get_route_handler()`.

👉 👩‍🔬 📨 🔢. & 👈 🔢 ⚫️❔ 🔜 📨 📨 & 📨 📨.

📥 👥 ⚙️ ⚫️ ✍ `GzipRequest` ⚪️➡️ ⏮️ 📨.

```Python hl_lines="18-26"
{!../../../docs_src/custom_request_and_route/tutorial001.py!}
```

!!! note "📡 ℹ"
     `Request` ✔️ `request.scope` 🔢, 👈 🐍 `dict` ⚗ 🗃 🔗 📨.

     `Request` ✔️ `request.receive`, 👈 🔢 "📨" 💪 📨.

🛠️ 👈 🌐 📨 📨 🔜 👯‍♂️ `https` ⚖️ `wss`.

🙆 📨 📨 `http` ⚖️ `ws` 🔜 ❎ 🔐 ⚖ ↩️.

```Python hl_lines="2  6"
{!../../../docs_src/advanced_middleware/tutorial001.py!}
```

## `TrustedHostMiddleware`

🛠️ 👈 🌐 📨 📨 ✔️ ☑ ⚒ `Host` 🎚, ✔ 💂‍♂ 🛡 🇺🇸🔍 🦠 🎚 👊.

```Python hl_lines="2  6-8"
{!../../../docs_src/advanced_middleware/tutorial002.py!}
```

📄 ❌ 🐕‍🦺:

接下来，创建使用 `GzipRequest` 的 `fastapi.routing.APIRoute  ` 的自定义子类。

此时，这个自定义子类会覆盖 `APIRoute.get_route_handler()`。

`APIRoute.get_route_handler()` 方法返回的是函数，并且返回的函数接收请求并返回响应。

本例用它根据原始请求创建 `GzipRequest`。

```Python hl_lines="18-26"
{!../../../docs_src/custom_request_and_route/tutorial001.py!}
```

!!! note "技术细节"

    `Request` 的 `request.scope` 属性是包含关联请求元数据的字典。

    `Request` 的 `request.receive` 方法是**接收**请求体的函数。

    val body =
      FormBody.Builder()
        .addEncoded("a+=& b", "c+=& d")
        .addEncoded("e+=& f", "g+=& h")
        .addEncoded("%25", "%25")
        .build()
    val expected = "a+%3D%26+b=c+%3D%26+d&e+%3D%26+f=g+%3D%26+h&%25=%25"
    val out = Buffer()
    body.writeTo(out)
    assertThat(out.readUtf8()).isEqualTo(expected)
  }

  @Test
  fun encodedPair() {
    val body =
      FormBody.Builder()

# 정적 파일

'StaticFiles'를 사용하여 디렉토리에서 정적 파일을 자동으로 제공할 수 있습니다.

## `StaticFiles` 사용

* `StaticFiles` 임포트합니다.
* 특정 경로에 `StaticFiles()` 인스턴스를 "마운트" 합니다.

```Python hl_lines="2  6"
{!../../../docs_src/static_files/tutorial001.py!}
```

!!! note "기술적 세부사항"
    `from starlette.staticfiles import StaticFiles` 를 사용할 수도 있습니다.