///

Dem `status_code`-Parameter wird eine Zahl mit dem HTTP-Statuscode übergeben.

/// info | Info

Alternativ kann `status_code` auch ein `IntEnum` erhalten, wie etwa Pythons <a href="https://docs.python.org/3/library/http.html#http.HTTPStatus" class="external-link" target="_blank">`http.HTTPStatus`</a>.

///

* Datenvalidierung
* Datenserialisierung
* Datendokumentation, usw.

Das funktioniert genauso wie mit Pydantic-Modellen. Und tatsächlich wird es unter der Haube mittels Pydantic auf die gleiche Weise bewerkstelligt.

/// info | Info

Bedenken Sie, dass Datenklassen nicht alles können, was Pydantic-Modelle können.

Daher müssen Sie möglicherweise weiterhin Pydantic-Modelle verwenden.

---> 100%
```

</div>

Ele também vem incluído quando você instala os extras `all` com:

<div class="termy">

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

</div>

/// info | Informação

No Pydantic v1 ele vinha incluído no pacote principal. Agora é distribuído como um pacote independente para que você possa optar por instalá-lo ou não, caso não precise dessa funcionalidade.

///

# 请求表单与文件

FastAPI 支持同时使用 `File` 和 `Form` 定义文件和表单字段。

/// info | 说明

接收上传文件或表单数据，要预先安装 <a href="https://github.com/Kludex/python-multipart" class="external-link" target="_blank">`python-multipart`</a>。

例如，`pip install python-multipart`。

///

## 导入 `File` 与 `Form`

{* ../../docs_src/request_forms_and_files/tutorial001.py hl[1] *}

## 定义 `File` 与 `Form` 参数

创建文件和表单参数的方式与 `Body` 和 `Query` 一样：

def test_openapi_schema():
    response = client.get("/openapi.json")
    assert response.status_code == 200, response.text
    assert response.json() == {
        "openapi": "3.1.0",
        "info": {"title": "FastAPI", "version": "0.1.0"},
        "paths": {
            "/a": {
                "get": {
                    "responses": {
                        "500": {

            ftpClient.connect(info.getHost(), info.getPort());
            validateRequest(ftpClient);

            final FtpAuthentication auth = ftpAuthenticationHolder.get(info.toUrl());
            if (auth != null && !ftpClient.login(auth.getUsername(), auth.getPassword())) {
                throw new CrawlerLoginFailureException("Login Failure: " + auth.getUsername() + " for " + info.toUrl());
            }

/*
 [Crawler Notification]
*/
subject: [FESS] Status Change: /*pmb.hostname:orElse('Unknown')*/
>>>
--- Server Info ---
Cluster Name: /*pmb.clustername:orElse('Unknown')*/
Host Name: /*pmb.hostname:orElse('Unknown')*/

--- Status ---

    with TestClient(app) as client:
        response = client.get("/openapi.json")
        assert response.status_code == 200, response.text
        assert response.json() == {
            "openapi": "3.1.0",
            "info": {"title": "FastAPI", "version": "0.1.0"},
            "paths": {
                "/items/": {
                    "get": {
                        "responses": {
                            "200": {

        },
    }


def test_openapi_schema():
    response = client.get("/openapi.json")
    assert response.status_code == 200, response.text
    assert response.json() == {
        "openapi": "3.1.0",
        "info": {"title": "FastAPI", "version": "0.1.0"},
        "paths": {
            "/items/": {
                "post": {
                    "summary": "Create Item",
                    "operationId": "create_item_items__post",

      try {
        while (true) {
          val socket = serverSocket!!.accept()
          connectionCount.incrementAndGet()
          service(socket)
        }
      } catch (e: SocketException) {
        logger.info("$threadName done accepting connections: ${e.message}")
      } catch (e: IOException) {
        logger.log(Level.WARNING, "$threadName failed unexpectedly", e)
      } finally {
        for (socket in openSockets) {