* その後、`response` を返す前にさらに `response` を変更することもできます。

```Python hl_lines="8-9  11  14"
{!../../docs_src/middleware/tutorial001.py!}
```

/// tip | "豆知識"

<a href="https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers" class="external-link" target="_blank">'X-'プレフィックスを使用</a>してカスタムの独自ヘッダーを追加できます。

  // 'authorizer.requestResource' - A CEL ResourceCheck constructed from the 'authorizer' and configured with the
  //   request resource.
  // Documentation on CEL: https://kubernetes.io/docs/reference/using-api/cel/
  //
  // Required.
  optional string expression = 2;
}

// MutatingWebhook describes an admission webhook and the resources and operations it applies to.
message MutatingWebhook {

 * powerful advantage. Although Java offers certain immutable collection factory methods, such as
 * {@link Collections#singleton(Object)} and <a
 * href="https://docs.oracle.com/javase/9/docs/api/java/util/Set.html#immutable">{@code Set.of}</a>,
 * we recommend using <i>these</i> classes instead for this reason (as well as for consistency).
 *
 * <h4>Creation</h4>
 *

import javax.annotation.CheckForNull;
import org.checkerframework.checker.nullness.qual.Nullable;

/**
 * Static convenience methods that serve the same purpose as Java language <a
 * href="https://docs.oracle.com/javase/8/docs/technotes/guides/language/assert.html">assertions</a>,
 * except that they are always enabled. These methods should be used instead of Java assertions
 * whenever there is a chance the check may fail "in real life". Example:

```

/// info

FastAPI ⚙️ Pydantic 🏷 `.dict()` ⏮️ <a href="https://docs.pydantic.dev/latest/concepts/serialization/#modeldict" class="external-link" target="_blank">🚮 `exclude_unset` 🔢</a> 🏆 👉.

///

/// info

👆 💪 ⚙️:

* `response_model_exclude_defaults=True`
* `response_model_exclude_none=True`

	}

	if objInfo.IsRemote() {
		// Check if object is being restored. For more information on x-amz-restore header see
		// https://docs.aws.amazon.com/AmazonS3/latest/API/API_HeadObject.html#API_HeadObject_ResponseSyntax
		w.Header()[xhttp.AmzStorageClass] = []string{filterStorageClass(ctx, objInfo.TransitionedObject.Tier)}
	}

       *
       * Android API level 26 and JVM8 both let our Error propagate directly the first time and
       * throw NoClassDefFoundError thereafter. This is the proper behavior according to the spec.
       * See https://docs.oracle.com/javase/specs/jls/se8/html/jls-12.html#jls-12.4.2 (steps #11 and
       * #5).
       *
       * Note that that "first time" might happen in a test other than
       * testLexicographicalComparatorChoice!

            <type>ActivationFile</type>
          </association>
        </field>
      </fields>
    </class>

    <!-- TODO: reproduced from maven-model/maven.mdo, instead should inherit code and link to external docs -->
    <class>
      <name>RepositoryBase</name>
      <version>1.0.0</version>
      <description><![CDATA[
         Repository contains the information needed

你会看到类似内容：

```JSON
{"item_id": 5, "q": "somequery"}
```

## 交互式 API 文档

现在你可以转到 <a href="http://192.168.99.100/docs" class="external-link" target="_blank">http://192.168.99.100/docs</a> 或 <a href ="http://127.0.0.1/docs" class="external-link" target="_blank">http://127.0.0.1/docs</a> （或其他等价的，使用 Docker 主机）。

也就是说，**FastAPI** 针对差不多 80% 的 Python 开发者使用的编辑器进行了测试，而且其它大多数编辑器的工作方式也与之类似，因此，**FastAPI** 的优势几乎能在所有编辑器上体现。

通过这种方式，我就能找到尽可能减少代码重复的最佳方式，进而实现处处都有自动补全、类型提示与错误检查等支持。

所有这些都是为了给开发者提供最佳的开发体验。

## 需求项

经过测试多种备选方案，我最终决定使用  <a href="https://docs.pydantic.dev/" class="external-link" target="_blank">**Pydantic**</a>，并充分利用它的优势。

我甚至为它做了不少贡献，让它完美兼容了 JSON Schema，支持多种方式定义约束声明，并基于多个编辑器，改进了它对编辑器支持（类型检查、自动补全）。