# カスタムレスポンス - HTML、ストリーム、ファイル、その他 { #custom-response-html-stream-file-others }

デフォルトでは、**FastAPI** はJSONレスポンスを返します。

[レスポンスを直接返す](response-directly.md)で見たように、`Response` を直接返してこの挙動を上書きできます。

しかし、`Response`（または `JSONResponse` のような任意のサブクラス）を直接返す場合、（`response_model` を宣言していても）データは自動的に変換されず、ドキュメントも自動生成されません（例えば、生成されるOpenAPIの一部としてHTTPヘッダー `Content-Type` に特定の「メディアタイプ」を含めるなど）。

                abstractFuture = trusted;
                continue; // loop back up and try to complete the new future
              }
            } else {
              // not a Trusted instance, call cancel directly.
              futureToPropagateTo.cancel(mayInterruptIfRunning);
            }
          }
          break;
        }
        // obj changed, reread
        localValue = abstractFuture.value();

== How to write good tests?

=== Base classes for test cases

There are multiple base classes for tests:

* **`ESTestCase`**: The base class of all tests. It is typically extended
  directly by unit tests.
* **`ESSingleNodeTestCase`**: This test case sets up a cluster that has a
  single node.
* **`ESIntegTestCase`**: An integration test case that creates a cluster that
  might have multiple nodes.

 * AbstractMapBasedMultimap} calls {@link #createCollection()} to create the collection of values
 * for that key. The subclass should not call {@link #createCollection()} directly, and a new
 * instance should be created every time the method is called.
 *
 * <p>For example, the subclass could pass a {@link java.util.TreeMap} during construction, and

   * X-Download-Options}</a> header field name.
   *
   * <p>When the new X-Download-Options header is present with the value {@code noopen}, the user is
   * prevented from opening a file download directly; instead, they must first save the file
   * locally.
   *
   * @since 24.1
   */
  public static final String X_DOWNLOAD_OPTIONS = "X-Download-Options";

    h += h << 3;
    h ^= h >>> 6;
    h += (h << 2) + (h << 14);
    return h ^ (h >>> 16);
  }

  /**
   * This method is a convenience for testing. Code should call {@link Segment#copyEntry} directly.
   */
  // Guarded By Segment.this
  @VisibleForTesting
  E copyEntry(E original, E newNext) {
    int hash = original.getHash();
    return segmentFor(hash).copyEntry(original, newNext);
  }

no_wait        (on|off)    non-blocking message delivery when set to 'on', default is 'off'
internal       (on|off)    set to 'on' for exchange to be not used directly by publishers, but only when bound to other exchanges
auto_deleted   (on|off)    auto delete queue when set to 'on', when there are no consumers
delivery_mode  (number)    set to '1' for non-persistent or '2' for persistent queue

</p>

<p>
The return value of <code>recover</code> is <code>nil</code> when the
goroutine is not panicking or <code>recover</code> was not called directly by a deferred function.
Conversely, if a goroutine is panicking and <code>recover</code> was called directly by a deferred function,
the return value of <code>recover</code> is guaranteed not to be <code>nil</code>.

### Retorne uma Response diretamente { #return-a-response-directly }

O caso mais comum seria [retornar uma Response diretamente, conforme explicado posteriormente na documentação avançada](../advanced/response-directly.md).

{* ../../docs_src/response_model/tutorial003_02_py310.py hl[8,10:11] *}

- The audit event sourceIPs list will now always end with the IP that sent the request directly to the API server. ([#87167](https://github.com/kubernetes/kubernetes/pull/87167), [@tallclair](https://github.com/tallclair)) [SIG API Machinery and Auth]