// Just wait for it to cancel.
				for blockResp {
					select {
					case <-ctx.Done():
						close(serverCanceled)
						return NewRemoteErr(ctx.Err())
					case resp <- []byte{1}:
						time.Sleep(10 * time.Millisecond)
					}
				}
				// Just wait for it to cancel.
				<-ctx.Done()
				close(serverCanceled)
				return NewRemoteErr(ctx.Err())
			},
			OutCapacity: 1,

	ErrInvalidPart: {
		Code:           "InvalidPart",
		Description:    "One or more of the specified parts could not be found.  The part may not have been uploaded, or the specified entity tag may not match the part's entity tag.",
		HTTPStatusCode: http.StatusBadRequest,
	},
	ErrMissingPart: {
		Code:           "InvalidRequest",
		Description:    "You must specify at least one part",
		HTTPStatusCode: http.StatusBadRequest,
	},

 */
class HttpUrl private constructor(
  /** Either "http" or "https". */
  @get:JvmName("scheme") val scheme: String,
  /**
   * The decoded username, or an empty string if none is present.
   *
   * | URL                              | `username()` |
   * | :------------------------------- | :----------- |
   * | `http://host/`                   | `""`         |

     *
     * - If the stack overflowed after set()/setValue() stored its result, then a call to
     * setException() will be a no-op because the Future is already done.
     *
     * Both scenarios are bad: The output Future might never complete, or, if it does complete, it
     * might not run some of its listeners. The likely result is that the app will hang. (And of

        sb.append("      id: ").append(getId()).append(LS);
        sb.append("      url: ").append(getUrl()).append(LS);
        sb.append("   layout: ").append(layout != null ? layout : "none");

        if (proxy != null) {
            sb.append(LS)
                    .append("    proxy: ")
                    .append(proxy.getHost())
                    .append(':')

from typing import Any

from fastapi import Depends, FastAPI, Request, Response
from fastapi.testclient import TestClient

legacy_request_state_context_var: ContextVar[dict[str, Any] | None] = ContextVar(
    "legacy_request_state_context_var", default=None
)

app = FastAPI()


async def set_up_request_state_dependency():
    request_state = {"user": "deadpond"}

////

## HTML "abbr" 元素 { #html-abbr-elements }

//// tab | 测试

这里有一些包裹在 HTML "abbr" 元素中的内容（有些是虚构的）：

### abbr 提供了完整短语 { #the-abbr-gives-a-full-phrase }

* <abbr title="Getting Things Done - 尽管去做">GTD</abbr>
* <abbr title="less than - 小于"><code>lt</code></abbr>
* <abbr title="XML Web Token - XML Web 令牌">XWT</abbr>
* <abbr title="Parallel Server Gateway Interface - 并行服务器网关接口">PSGI</abbr>

pkg net/netip, method (Addr) String() string
pkg net/netip, method (Addr) StringExpanded() string
pkg net/netip, method (Addr) Unmap() Addr
pkg net/netip, method (Addr) WithZone(string) Addr
pkg net/netip, method (Addr) Zone() string
pkg net/netip, method (AddrPort) Addr() Addr
pkg net/netip, method (AddrPort) AppendTo([]uint8) []uint8
pkg net/netip, method (AddrPort) IsValid() bool
pkg net/netip, method (AddrPort) MarshalBinary() ([]uint8, error)

    # o procedureSynonymHandlingType: (NotRequired - Default NONE)
    #  You can specify the handling type of procedure synonym.
    #   NONE - No handling. (default)
    #   INCLUDE - It includes procedure synonyms.
    #   SWITCH - It switches all normal procedures to procedure synonyms.
    #
    #; procedureSynonymHandlingType = NONE
    # - - - - - - - - - -/

Вы также можете объявить параметры тела запроса как необязательные, установив значение по умолчанию, равное `None`:

{* ../../docs_src/body_multiple_params/tutorial001_an_py310.py hl[18:20] *}

/// note | Заметка

Заметьте, что в данном случае параметр `item`, который будет взят из тела запроса, необязателен. Так как было установлено значение `None` по умолчанию.

///

## Несколько параметров тела запроса { #multiple-body-parameters }