如果你所在的国家/地区屏蔽了某些 URL，这会很有用。

### 关闭自动文档 { #disable-the-automatic-docs }

第一步是关闭自动文档，因为默认它们会使用默认的 CDN。

要关闭它们，在创建 `FastAPI` 应用时将其 URL 设为 `None`：

{* ../../docs_src/custom_docs_ui/tutorial001_py310.py hl[8] *}

### 包含自定义文档 { #include-the-custom-docs }

现在你可以为自定义文档创建*路径操作*。

你可以复用 FastAPI 的内部函数来创建文档的 HTML 页面，并传入所需参数：

		// Baremetal setups set DNS refresh window up to dnsTTL duration.
		t := time.NewTicker(dnsTTL)
		defer t.Stop()
		for {
			select {
			case <-t.C:
				globalDNSCache.Refresh()

			case <-GlobalContext.Done():
				return
			}
		}
	}()
}

type envKV struct {
	Key   string
	Value string
	Skip  bool
}

func (e envKV) String() string {
	if e.Skip {
		return ""
	}

			go func(i int, set *erasureObjects) {
				defer wg.Done()
				err := set.listPath(listCtx, o, innerResults)
				mu.Lock()
				defer mu.Unlock()
				if err == nil {
					allAtEOF = false
				}
				errs[i] = err
			}(len(errs), set)
			errs = append(errs, nil)
		}
	}
	mu.Unlock()

	// Gather results to a single channel.
	// Quorum is one since we are merging across sets.

 * applications which involve tightly-looped or deeply-nested locking algorithms.
 *
 * @author Darick Tong
 * @since 13.0
 */
@J2ktIncompatible
@GwtIncompatible
public class CycleDetectingLockFactory {

  /**
   * Encapsulates the action to be taken when a potential deadlock is encountered. Clients can use
   * one of the predefined {@link Policies} or specify a custom implementation. Implementations must
   * be thread-safe.

In this scenario, each one of the cleaners (including you) would be a processor, doing their part of the job.

Porém se você especificou uma classe de retorno com o valor `None` como media type, o FastAPI utilizará `application/json` para qualquer retorno adicional que possui um modelo associado.

///

## Combinando informações { #combining-information }

}

func (w *writerWrapper) Write(p []byte) (n int, err error) {
	buf := GetByteBufferCap(len(p))
	buf = buf[:len(p)]
	copy(buf, p)
	select {
	case w.ch <- buf:
		return len(p), nil
	case <-w.ctx.Done():
		return 0, context.Cause(w.ctx)
	}
}

// WriterToChannel will return an io.Writer that writes to the given channel.
// The context both allows returning errors on writes and to ensure that

                    // Add the link to the DOM so that it can be clicked
                    downloadLink.href = window.URL.createObjectURL(textFileAsBlob);
                    downloadLink.style.display = "none";
                    document.body.appendChild(downloadLink);

                    downloadLink.click();
                }
            </script>

   *
   * @throws IllegalArgumentException if the stream consists of two or more elements.
   * @throws NullPointerException if any element in the stream is {@code null}.
   * @return {@code Optional.of(onlyElement)} if the stream has exactly one element (must not be
   *     {@code null}) and returns {@code Optional.empty()} if it has none.
   */
  @SuppressWarnings("unchecked")

  }

  /**
   * Tests that all listeners complete, even if they were added before or after the future was
   * finishing. Also acts as a concurrency test to make sure the locking is done correctly when a
   * future is finishing so that no listeners can be lost.
   */
  public void testAllListenersCompleteSuccessfully()
      throws InterruptedException, ExecutionException {