# 请求文件 { #request-files }

你可以使用 `File` 定义由客户端上传的文件。

/// info | 信息

要接收上传的文件，请先安装 [`python-multipart`](https://github.com/Kludex/python-multipart)。

请确保你创建一个[虚拟环境](../virtual-environments.md)、激活它，然后安装，例如：

```console
$ pip install python-multipart
```

这是因为上传文件是以「表单数据」发送的。

///

## 导入 `File` { #import-file }

从 `fastapi` 导入 `File` 和 `UploadFile`：

{* ../../docs_src/request_files/tutorial001_an_py310.py hl[3] *}

Sebastián Ramírez <******@****.***> 1774026397 +0100

  exchangeIndex: Int,
  socket: MockWebServerSocket,
  failure: IOException? = null,
): RecordedRequest {
  val requestUrl =
    when (requestLine.method) {
      "CONNECT" -> "${socket.scheme}://${requestLine.target}/".toHttpUrlOrNull()
      else -> null
    }
      ?: requestLine.target.toHttpUrlOrNull()
      ?: requestUrl(socket, requestLine, headers)

  return RecordedRequest(
    connectionIndex = connectionIndex,

		Err:     "failed to decrypt ciphertext",
	}

	// ErrNotSupported is an error returned by the KMS when the requested
	// functionality is not supported by the KMS service.
	ErrNotSupported = Error{
		Code:    http.StatusNotImplemented,
		APICode: "kms:NotSupported",
		Err:     "requested functionality is not supported",
	}
)

// Error is a KMS error that can be translated into an S3 API error.
//

    int DCERPC_CONC_MPX = 0x10; /* supports concurrent multiplexing */
    /**
     * Did not execute flag - indicates request was not executed
     */
    int DCERPC_DID_NOT_EXECUTE = 0x20;
    /**
     * Maybe flag - indicates 'maybe' call semantics requested
     */
    int DCERPC_MAYBE = 0x40; /* `maybe' call semantics requested */
    /**
     * Object UUID flag - if true, a non-nil object UUID is present
     */

 * of requested operations. The codes follow the Windows NT status code format.
 */
public interface NtStatus {

    /* Don't bother to edit this. Everthing within the interface
     * block is automatically generated from the ntstatus package.
     */

    /** The operation completed successfully */
    int NT_STATUS_SUCCESS = 0x00000000;
    /** The requested operation was unsuccessful */

                        "The requested required projects " + requiredSelectors + " do not exist.", request.getPom());
            } else {
                String optionalSelectors = unresolvedSelectors.stream()
                        .map(ProjectActivation.ProjectActivationSettings::selector)
                        .collect(Collectors.joining(", "));

	// on the client node that requested the lock.
	Source string `msgp:"omitempty"`

	// Quorum represents the expected quorum for this lock type.
	Quorum *int `msgp:"omitempty"`
}

// ResponseCode is the response code for a locking request.
type ResponseCode uint8

// Response codes for a locking request.
const (
	RespOK ResponseCode = iota
	RespLockConflict
	RespLockNotInitialized

     * @param session         The current build session, must not be {@code null}.
     * @return The transitive dependencies of the specified project that match the requested scopes, never {@code null}.
     * @throws ArtifactResolutionException in case of resolution issue
     * @throws ArtifactNotFoundException if an artifact is not found
     */

Sie können mehrere `Form`-Parameter in einer *Pfadoperation* deklarieren, aber Sie können nicht gleichzeitig auch `Body`-Felder deklarieren, welche Sie als JSON erwarten, da der <abbr title="Request – Anfrage: Daten, die der Client zum Server sendet">Request</abbr> den Body mittels `application/x-www-form-urlencoded` statt `application/json` kodiert.

Das ist keine Limitation von **FastAPI**, sondern Teil des HTTP-Protokolls.

///