{* ../../docs_src/behind_a_proxy/tutorial002_py39.py hl[3] *}

Передача `root_path` в `FastAPI` эквивалентна опции командной строки `--root-path` для Uvicorn или Hypercorn.

### О `root_path` { #about-root-path }

Учтите, что сервер (Uvicorn) не использует `root_path` ни для чего, кроме как передать его в приложение.

  private val perMessageDeflate: Boolean,
  private val noContextTakeover: Boolean,
) : Closeable {
  private var closed = false
  private var receivedCloseFrame = false

  // Stateful data about the current frame.
  private var opcode = 0
  private var frameLength = 0L
  private var isFinalFrame = false
  private var isControlFrame = false
  private var readingCompressedMessage = false

        buildContext
                .getResult()
                .addBuildSummary(new BuildFailure(mavenProject, Duration.between(buildStartTime, buildEndTime), t));

        // notify listeners about "soft" project build failures only
        if (t instanceof Exception exception && !(t instanceof RuntimeException)) {
            eventCatapult.fire(ExecutionEvent.Type.ProjectFailed, currentSession, null, exception);
        }

 * general way.
 *
 * <p>A good example of usage of this class is for HTML escaping where the replacement array
 * contains information about the named HTML entities such as {@code &amp;} and {@code &quot;} while
 * {@link #escapeUnsafe} is overridden to handle general escaping of the form {@code &#NNNNN;}.
 *

      result = "running=[DONE]";
    } else if (state instanceof Blocker) {
      result = "running=[INTERRUPTED]";
    } else if (state instanceof Thread) {
      // getName is final on Thread, no need to worry about exceptions
      result = "running=[RUNNING ON " + ((Thread) state).getName() + "]";
    } else {
      result = "running=[NOT STARTED YET]";
    }
    return result + ", " + toPendingString();
  }

But when the form includes files, it is encoded as `multipart/form-data`. If you use `File`, **FastAPI** will know it has to get the files from the correct part of the body.

If you want to read more about these encodings and form fields, head to the <a href="https://developer.mozilla.org/en-US/docs/Web/HTTP/Methods/POST" class="external-link" target="_blank"><abbr title="Mozilla Developer Network">MDN</abbr> web docs for <code>POST</code></a>.

Например:

{* ../../docs_src/additional_responses/tutorial004_py310.py hl[11:15,24] *}

## Дополнительная информация об ответах OpenAPI { #more-information-about-openapi-responses }

Чтобы увидеть, что именно можно включать в ответы, посмотрите эти разделы спецификации OpenAPI:

  private static final class LegacyAsyncDispatcher extends Dispatcher {

    // This dispatcher matches the original dispatch behavior of AsyncEventBus.
    //
    // We can't really make any guarantees about the overall dispatch order for this dispatcher in
    // a multithreaded environment for a couple of reasons:
    //
    // 1. Subscribers to events posted on different threads can be interleaved with each other

{* ../../docs_src/behind_a_proxy/tutorial002_py39.py hl[3] *}

Die Übergabe des `root_path` an `FastAPI` wäre das Äquivalent zur Übergabe der `--root-path`-Kommandozeilenoption an Uvicorn oder Hypercorn.

### Über `root_path` { #about-root-path }

Beachten Sie, dass der Server (Uvicorn) diesen `root_path` für nichts anderes verwendet als für die Weitergabe an die Anwendung.

    // TODO(dbeaumont): Support escapers where alphanumeric chars are not safe.
    checkNotNull(safeChars); // eager for GWT.
    // Avoid any misunderstandings about the behavior of this escaper
    if (safeChars.matches(".*[0-9A-Za-z].*")) {
      throw new IllegalArgumentException(
          "Alphanumeric characters are always 'safe' and should not be explicitly specified");
    }