但当表单包含文件时，会编码为 `multipart/form-data`。如果你使用 `File`，**FastAPI** 会知道需要从请求体的正确位置获取文件。

如果你想进一步了解这些编码和表单字段，请参阅 [<abbr title="Mozilla Developer Network - Mozilla 开发者网络">MDN</abbr> 关于 `POST` 的 Web 文档](https://developer.mozilla.org/en-US/docs/Web/HTTP/Methods/POST)。

///

/// warning | 警告

你可以在一个*路径操作*中声明多个 `File` 和 `Form` 参数，但不能同时声明希望以 JSON 接收的 `Body` 字段，因为此时请求体会使用 `multipart/form-data` 编码，而不是 `application/json`。

这不是 **FastAPI** 的限制，而是 HTTP 协议的一部分。

 * backing collection and the mutex are serializable.
 *
 * <p>If {@code null} is passed as the {@code mutex} parameter to any of this class's top-level
 * methods or inner class constructors, the created object uses itself as the synchronization mutex.
 *
 * <p>This class should be used by other collection classes only.
 *
 * @author Mike Bostock
 * @author Jared Levy
 */

//
// We expose this here to allow fine-grained synchronization in multi-threaded
// workloads, which is required since the Python implementation depends on the
// above mutation methods. This allows us to prevent modifications to nodes in
// the graph after the session has been made aware of them.
TF_CAPI_EXPORT extern void TF_ExtendSession(TF_Session* session,

인코딩과 폼 필드에 대해 더 알고싶다면, [<abbr title="Mozilla Developer Network - 모질라 개발자 네트워크">MDN</abbr> 웹 문서의 `POST`](https://developer.mozilla.org/en-US/docs/Web/HTTP/Methods/POST)를 참고하기 바랍니다.

///

/// warning | 경고

다수의 `File` 과 `Form` 매개변수를 한 *경로 처리*에 선언하는 것이 가능하지만, 요청의 본문이 `application/json` 가 아닌 `multipart/form-data` 로 인코딩 되기 때문에 JSON으로 받아야하는 `Body` 필드를 함께 선언할 수는 없습니다.

- Signatures on scale client methods have been modified to accept `context.Context` as a first argument. Signatures of Get, Update, and Patch methods have been updated to accept GetOptions, UpdateOptions and PatchOptions respectively. ([#88599](https://github.com/kubernetes/kubernetes/pull/88599), [@julianvmodesto](https://github.com/julianvmodesto))...

* The `DefaultFeatureGate` package variable now only exposes readonly feature gate methods. Methods for mutating feature gates have moved into a `MutableFeatureGate` interface and are accessible via the `DefaultMutableFeatureGate` package variable. Only top-level commands and options setup should access `DefaultMutableFeatureGate`. ([#7130...

            return cache.get(otherKey, loader); // loads another key, is ok
          }
        };
    testLoadThrows(key, cache, proxyLoader);
  }

  // utility methods

  private void testLoadThrows(
      String key, LocalCache<String, String> cache, CacheLoader<String, String> loader)
      throws InterruptedException {
    CountDownLatch doneSignal = new CountDownLatch(1);

            return cache.get(otherKey, loader); // loads another key, is ok
          }
        };
    testLoadThrows(key, cache, proxyLoader);
  }

  // utility methods

  private void testLoadThrows(
      String key, LocalCache<String, String> cache, CacheLoader<String, String> loader)
      throws InterruptedException {
    CountDownLatch doneSignal = new CountDownLatch(1);

import org.apache.hc.client5.http.auth.NTCredentials;
import org.apache.hc.client5.http.auth.UsernamePasswordCredentials;
import org.apache.hc.client5.http.classic.methods.HttpGet;
import org.apache.hc.client5.http.classic.methods.HttpHead;
import org.apache.hc.client5.http.config.ConnectionConfig;
import org.apache.hc.client5.http.config.RequestConfig;
import org.apache.hc.client5.http.cookie.BasicCookieStore;

これらのエンコーディングやフォームフィールドの詳細は、[<abbr title="Mozilla Developer Network - Mozilla 開発者ネットワーク">MDN</abbr> Web Docs の `POST`](https://developer.mozilla.org/en-US/docs/Web/HTTP/Methods/POST) を参照してください。

///

/// warning | 注意