and other connections will be blocked while the large payload is being sent.

## Handlers & Routes

Handlers have a predefined Handler ID.
In addition, there can be several *static* subroutes used to differentiate between different handlers of the same ID.
A subroute on a client must match a subroute on the server. So routes cannot be used for dynamic routing, unlike HTTP.

* recap (noun): резюме
* utility function: вспомогательная функция
* fast to code: позволяет быстро писать код
* Tutorial - User Guide: Учебник - Руководство пользователя
* submodule: подмодуль
* subpackage: подпакет
* router: роутер
* building, deploying, accessing (when describing features of FastAPI Cloud): созданиe образа, развертывание и доступ
* type checker tool: инструмент проверки типов

{* ../../docs_src/custom_request_and_route/tutorial002_an_py310.py hl[17:19] *}

## ルーターでのカスタム `APIRoute` クラス { #custom-apiroute-class-in-a-router }

`APIRouter` の `route_class` パラメータを設定することもできます：

{* ../../docs_src/custom_request_and_route/tutorial003_py310.py hl[26] *}

この例では、`router` 配下の *path operations* はカスタムの `TimedRoute` クラスを使用し、レスポンスの生成にかかった時間を示す追加の `X-Response-Time` ヘッダーがレスポンスに含まれます：

## 功能 { #features }

- **Path Operation Explorer** - 顯示應用程式中所有 <dfn title="路由、端點">*路徑操作*</dfn> 的側邊欄樹狀檢視。點擊即可跳至任一路由或 router 定義。
- **Route Search** - 使用 <kbd>Ctrl</kbd> + <kbd>Shift</kbd> + <kbd>E</kbd>（macOS：<kbd>Cmd</kbd> + <kbd>Shift</kbd> + <kbd>E</kbd>）依路徑、方法或名稱進行搜尋。

    }

    @Override
    public int compareTo(CountsHashCodeAndEquals o) {
      onCompareTo.run();
      return delegateString.compareTo(o.delegateString);
    }
  }

  /** A holder of counters for calls to hashCode, equals, and compareTo. */
  private static final class CallsCounter {
    long hashCode;
    long equals;
    long compareTo;

    long total() {
      return hashCode + equals + compareTo;

            Exception innermost = new IOException("Innermost exception");
            Exception middle = new RuntimeException("Middle exception", innermost);
            Exception rootCause = new IllegalStateException("Outer exception", middle);
            TransportException exception = new TransportException("Transport failed", rootCause);

            String result = exception.toString();

            assertNotNull(result);

import java.lang.annotation.Documented;
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;

/**
 * Outer class that exists solely to let us write {@code Partially.GwtIncompatible} instead of plain
 * {@code GwtIncompatible}. This is more accurate for {@link Futures#catching}, which is available

    assertThat(toTest).isEqualTo("FooBar{}");
  }

  @GwtIncompatible // Class names are obfuscated in GWT
  public void testToStringHelper_localInnerClass() {
    // Local inner classes have names ending like "Outer.$1Inner"
    class LocalInnerClass {}
    String toTest = MoreObjects.toStringHelper(new LocalInnerClass()).toString();
    assertThat(toTest).isEqualTo("LocalInnerClass{}");
  }

**FastAPI** sait quoi faire dans chaque cas et comment réutiliser le même objet, afin que toutes les tâches d'arrière-plan soient fusionnées et que les tâches soient ensuite exécutées en arrière-plan :

{* ../../docs_src/background_tasks/tutorial002_an_py310.py hl[13,15,22,25] *}

TEST_DIR="${SCRIPT_DIR}"
OUTPUT_DIR="/tmp/thumbnail_test_$$"

# Color codes for output
RED='\033[0;31m'
GREEN='\033[0;32m'
NC='\033[0m' # No Color

# Test counters
TESTS_PASSED=0
TESTS_FAILED=0

# Create output directory
mkdir -p "${OUTPUT_DIR}"

# Cleanup function
cleanup() {
    rm -rf "${OUTPUT_DIR}"
}
trap cleanup EXIT

# Test function