* A definition for a component that can be instantiated on demand.
     * This class handles component creation, dependency injection, and initialization.
     *
     * @param <T> the type of the component
     */
    protected static class ComponentDef<T> {
        /**
         * The class of the component to instantiate.
         */
        protected Class<T> cls;

        /**

///

//// tab | `pip`

<div class="termy">

```console
$ pip install "fastapi[standard]"

---> 100%
```

</div>

////

//// tab | `uv`

Wenn Sie <a href="https://github.com/astral-sh/uv" class="external-link" target="_blank">`uv`</a> haben:

<div class="termy">

```console
$ uv pip install "fastapi[standard]"
---> 100%
```

@GwtCompatible
@NullUnmarked
final class TestExceptions {
  static class SomeError extends Error {}

  static class SomeCheckedException extends Exception {}

  static class SomeOtherCheckedException extends Exception {}

  static class YetAnotherCheckedException extends Exception {}

  static class SomeUncheckedException extends RuntimeException {}

  static class SomeChainingException extends RuntimeException {

    assertThrows(IllegalArgumentException.class, () -> DoubleMath.mean(ImmutableList.<Double>of()));
    assertThrows(
        IllegalArgumentException.class, () -> DoubleMath.mean(ImmutableList.of(Double.NaN)));
    assertThrows(
        IllegalArgumentException.class,
        () -> DoubleMath.mean(ImmutableList.of(Double.POSITIVE_INFINITY)));
  }

    assertThrows(IllegalArgumentException.class, () -> parse("weakValues=true"));
  }

  public void testParse_repeatedValueStrength() {
    assertThrows(IllegalArgumentException.class, () -> parse("softValues, softValues"));

    assertThrows(IllegalArgumentException.class, () -> parse("softValues, weakValues"));

    assertThrows(IllegalArgumentException.class, () -> parse("weakValues, softValues"));

      receivedByteCount += byteCount
    }

    @Throws(IOException::class)
    override fun flush() {
    }

    override fun timeout(): Timeout = Timeout.NONE

    @Throws(IOException::class)
    override fun close() {
    }
  }

  /** Processes HTTP requests layered over HTTP/2. */
  private inner class Http2SocketHandler(
    private val connectionIndex: Int,

 *
 */
public class AdminBoostdocAction extends FessAdminAction {

    /**
     * Default constructor.
     */
    public AdminBoostdocAction() {
        super();
    }

    /** The role for this action. */
    public static final String ROLE = "admin-boostdoc";

    private static final Logger logger = LogManager.getLogger(AdminBoostdocAction.class);

 *
 */
public class AdminRoleAction extends FessAdminAction {

    /**
     * Default constructor.
     */
    public AdminRoleAction() {
        super();
    }

    /** Role name for admin role operations */
    public static final String ROLE = "admin-role";

    private static final Logger logger = LogManager.getLogger(AdminRoleAction.class);

* Puedes obtener metadatos del archivo subido.
* Tiene una interfaz `async` <a href="https://docs.python.org/3/glossary.html#term-file-like-object" class="external-link" target="_blank">parecida a un archivo</a>.
* Expone un objeto Python real <a href="https://docs.python.org/3/library/tempfile.html#tempfile.SpooledTemporaryFile" class="external-link" target="_blank">`SpooledTemporaryFile`</a> que puedes pasar directamente a otros paquetes que esperan un objeto parecido a un archivo.

* 这种方式更适于处理图像、视频、二进制文件等大型文件，好处是不会占用所有内存；
* 可获取上传文件的元数据；
* 自带 <a href="https://docs.python.org/zh-cn/3/glossary.html#term-file-like-object" class="external-link" target="_blank">file-like</a> `async` 接口；
* 暴露的 Python <a href="https://docs.python.org/zh-cn/3/library/tempfile.html#tempfile.SpooledTemporaryFile" class="external-link" target="_blank">`SpooledTemporaryFile`</a> 对象，可直接传递给其他预期「file-like」对象的库。

### `UploadFile`

`UploadFile` 的属性如下：