Usar uma URL relativa é importante para garantir que sua aplicação continue funcionando mesmo em um caso de uso avançado como [Atrás de um Proxy](../../advanced/behind-a-proxy.md){.internal-link target=_blank}.

///

Usar una URL relativa es importante para asegurarse de que tu aplicación siga funcionando incluso en un caso de uso avanzado como [Detrás de un Proxy](../../advanced/behind-a-proxy.md){.internal-link target=_blank}.

///

        // Decode
        int bytesDecoded = smbInfoAllocation.decode(buffer, 0, buffer.length);

        // Verify - actual implementation reads 20 bytes (4 + 4 + 4 + 4 + 4)
        // bytesPerSect is read as Int2 but advances by 4 bytes (padding)
        assertEquals(20, bytesDecoded);

        // Verify capacity calculation: alloc * sectPerAlloc * bytesPerSect
        long expectedCapacity = alloc * sectPerAlloc * bytesPerSect;

There are some situations in where it's useful to be able to add custom headers to the HTTP error. For example, for some types of security.

You probably won't need to use it directly in your code.

But in case you needed it for an advanced scenario, you can add custom headers:

{* ../../docs_src/handling_errors/tutorial002_py39.py hl[14] *}

## Install custom exception handlers { #install-custom-exception-handlers }

Die Verwendung einer relativen URL ist wichtig, um sicherzustellen, dass Ihre Anwendung auch in einem fortgeschrittenen Anwendungsfall, wie [hinter einem Proxy](../../advanced/behind-a-proxy.md){.internal-link target=_blank}, weiterhin funktioniert.

///

因为使用的是相对 URL，如果 API 位于 `https://example.com/`，则指向 `https://example.com/token`。但如果 API 位于 `https://example.com/api/v1/`，它指向的就是`https://example.com/api/v1/token`。

使用相对 URL 非常重要，可以确保应用在遇到[使用代理](../../advanced/behind-a-proxy.md){.internal-link target=_blank}这样的高级用例时，也能正常运行。

///

该参数不会创建端点或*路径操作*，但会声明客户端用来获取令牌的 URL `/token` 。此信息用于 OpenAPI 及 API 文档。

接下来，学习如何创建实际的路径操作。

/// info | 说明

/// note | 技術詳細

また、`from starlette import status`を使うこともできます。

**FastAPI** は、`開発者の利便性を考慮して、fastapi.status`と同じ`starlette.status`を提供しています。しかし、これはStarletteから直接提供されています。

///

## デフォルトの変更

        // Trip circuit
        circuitBreaker.trip();
        Thread.sleep(100);

        long afterTripTime = circuitBreaker.getTimeSinceLastStateChange();
        assertTrue(afterTripTime >= 100, "Time should have advanced");
        assertTrue(afterTripTime < 200, "Time should be reasonable");

        // Reset circuit
        circuitBreaker.reset();
        Thread.sleep(50);

      state = STATE_CLOSED
      if (trailers.size > 0) {
        client?.cookieJar?.receiveHeaders(url, trailers)
      }
    }
  }

  /** An HTTP body with a fixed length specified in advance. */
  private inner class FixedLengthSource(
    url: HttpUrl,
    private var bytesRemaining: Long,
  ) : AbstractSource(url) {
    init {
      if (bytesRemaining == 0L) {

/// note | Техническая информация
Обратите внимание на HTTP-заголовок `Authorization`, значение которого начинается с `Bearer `.
///

## Продвинутое использование `scopes` { #advanced-usage-with-scopes }

В OAuth2 существует понятие "диапазоны" ("`scopes`").

С их помощью можно добавить определенный набор разрешений к JWT-токену.