Da wir für unsere Anwendung einen Proxy mit dem Pfadpräfix `/api/v1` haben, muss das Frontend das OpenAPI-Schema unter `/api/v1/openapi.json` abrufen.

```mermaid
graph LR

browser("Browser")
proxy["Proxy auf http://0.0.0.0:9999/api/v1/app"]
server["Server auf http://127.0.0.1:8000/app"]

browser --> proxy
proxy --> server
```

/// tip | Tipp

    this.iterableDelegate = checkNotNull(iterable);
  }

  private Iterable<E> getDelegate() {
    return iterableDelegate != null ? iterableDelegate : this;
  }

  /**
   * Returns a fluent iterable that wraps {@code iterable}, or {@code iterable} itself if it is
   * already a {@code FluentIterable}.
   *
   * <p><b>{@code Stream} equivalent:</b> {@link Collection#stream} if {@code iterable} is a {@link

    this.iterableDelegate = checkNotNull(iterable);
  }

  private Iterable<E> getDelegate() {
    return iterableDelegate != null ? iterableDelegate : this;
  }

  /**
   * Returns a fluent iterable that wraps {@code iterable}, or {@code iterable} itself if it is
   * already a {@code FluentIterable}.
   *
   * <p><b>{@code Stream} equivalent:</b> {@link Collection#stream} if {@code iterable} is a {@link

     * dependency management entries in transitive dependency POMs. Maven 4 enables "transitivity" by default. Hence
     * unlike Maven 3, it obeys dependency management entries deep in the dependency graph as well.
     * <br/>
     * Default: <code>"true"</code>.
     *
     * @since 4.0.0
     */
    @Config(defaultValue = "true")
    public static final String MAVEN_RESOLVER_DEPENDENCY_MANAGER_TRANSITIVITY =

因此，（在浏览器中运行的）前端会尝试访问 `/openapi.json`，但无法获取 OpenAPI 模式。

因为我们的应用使用了路径前缀为 `/api/v1` 的代理，前端需要从 `/api/v1/openapi.json` 获取 OpenAPI 模式。

```mermaid
graph LR

browser("Browser")
proxy["Proxy on http://0.0.0.0:9999/api/v1/app"]
server["Server on http://127.0.0.1:8000/app"]

browser --> proxy
proxy --> server
```

/// tip | 提示

      // Invariant: all elements at indices in [knownRunStart, knownRunEnd) are nonnull.
      // If knownRunStart == knownRunEnd, this is vacuously true.
      // When knownRunEnd exceeds hashTable.length, it "wraps", detecting runs around the end
      // of the table.
      int knownRunStart = 0;
      int knownRunEnd = 0;

      outerLoop:
      while (knownRunStart < hashTable.length) {

    return app


_T = TypeVar("_T")


# Vendored from starlette.routing to avoid importing private symbols
class _AsyncLiftContextManager(AbstractAsyncContextManager[_T]):
    """
    Wraps a synchronous context manager to make it async.

    This is vendored from Starlette to avoid importing private symbols.
    """

    def __init__(self, cm: AbstractContextManager[_T]) -> None:
        self._cm = cm

   * there is no need to use this method.
   *
   * @param comparator the comparator that defines the order
   * @return comparator itself if it is already an {@code Ordering}; otherwise an ordering that
   *     wraps that comparator
   */
  public static <T extends @Nullable Object> Ordering<T> from(Comparator<T> comparator) {
    return (comparator instanceof Ordering)
        ? (Ordering<T>) comparator

			return trw.headerWritten
		} else if uw, ok := w.(unwrapper); ok {
			w = uw.Unwrap()
		} else {
			return false
		}
	}
}

// trackingResponseWriter wraps a ResponseWriter and notes when WriterHeader has
// been called. This allows high level request handlers to check if something
// has already sent the header.
type trackingResponseWriter struct {
	http.ResponseWriter

   *
   * @since 14.0 (since 1.0 as com.google.common.io.NullOutputStream)
   */
  public static OutputStream nullOutputStream() {
    return NULL_OUTPUT_STREAM;
  }

  /**
   * Wraps a {@link InputStream}, limiting the number of bytes which can be read.
   *
   * @param in the input stream to be wrapped
   * @param limit the maximum number of bytes to be read