///

## Eine benutzerdefinierte `Response` zurückgeben { #returning-a-custom-response }

///

## Devolver una `Response` personalizada { #returning-a-custom-response }

      return new SortedAsMap(sortedMap().tailMap(fromKey));
    }

    @Nullable SortedSet<K> sortedKeySet;

    // returns a SortedSet, even though returning a Set would be sufficient to
    // satisfy the SortedMap.keySet() interface
    @Override
    public SortedSet<K> keySet() {
      SortedSet<K> result = sortedKeySet;

   *
   * <p>When the weight of an entry is zero it will not be considered for size-based eviction
   * (though it still may be evicted by other means).
   *
   * <p><b>Important note:</b> Instead of returning this as a {@code CacheBuilder}
   * instance, this method returns {@code CacheBuilder<K1, V1>}. From this point on, either the
   * original reference or the returned reference may be used to complete configuration and build

**FastAPI** надає ті самі `starlette.responses` як `fastapi.responses` просто як зручність для вас, розробника. Але більшість доступних відповідей походять безпосередньо зі Starlette.

///

## Повернення власного `Response` { #returning-a-custom-response }

///

## Renvoyer une `Response` personnalisée { #returning-a-custom-response }

     */
    protected String renderMarkdownToHtml(final String markdown) {
        if (markdownRenderer == null || !markdownRenderer.isInitialized()) {
            logger.warn("MarkdownRenderer is not initialized, returning escaped text");
            return escapeHtml(markdown);
        }
        return markdownRenderer.render(markdown);
    }

    /**
     * Escapes HTML special characters.
     *

    ListeningExecutorService service = listeningDecorator(newDirectExecutorService());
    assertThat(listeningDecorator(service)).isSameInstanceAs(service);
    List<Callable<String>> callables = ImmutableList.of(Callables.returning("x"));
    List<Future<String>> results;

    results = service.invokeAll(callables);
    assertThat(getOnlyElement(results)).isInstanceOf(TrustedListenableFutureTask.class);

    ListeningExecutorService service = listeningDecorator(newDirectExecutorService());
    assertThat(listeningDecorator(service)).isSameInstanceAs(service);
    List<Callable<String>> callables = ImmutableList.of(Callables.returning("x"));
    List<Future<String>> results;

    results = service.invokeAll(callables);
    assertThat(getOnlyElement(results)).isInstanceOf(TrustedListenableFutureTask.class);

/// note | 技術細節

你也可以使用 `from starlette.responses import JSONResponse`。

**FastAPI** 為了方便開發者，將 `starlette.responses` 也提供為 `fastapi.responses`。但大多數可用的回應類型其實直接來自 Starlette。

///

## 回傳自訂 `Response` { #returning-a-custom-response }

上面的範例展示了所需的各個部分，但目前還不太實用，因為你其實可以直接回傳 `item`，**FastAPI** 就會幫你把它放進 `JSONResponse`，轉成 `dict` 等，這些都是預設行為。

現在來看看如何用它來回傳自訂回應。

假設你想要回傳一個 [XML](https://en.wikipedia.org/wiki/XML) 回應。