Si deseas leer más sobre estas codificaciones y campos de formularios, dirígete a la [<abbr title="Mozilla Developer Network - Red de Desarrolladores de Mozilla">MDN</abbr> web docs para `POST`](https://developer.mozilla.org/en-US/docs/Web/HTTP/Methods/POST).

///

/// warning | Advertencia

    public static TestmailPostcard droppedInto(Postbox postbox, MPCall<TestmailPostcard> postcardLambda) {
        TestmailPostcard postcard = new TestmailPostcard();
        postcardLambda.write(postcard);
        postbox.post(postcard);
        return postcard;
    }

    // ===================================================================================
    //                                                                           Meta Data

    current_user: Annotated[User, Security(get_current_user, scopes=["me"])],
):
    if current_user.disabled:
        raise HTTPException(status_code=400, detail="Inactive user")
    return current_user


@app.post("/token")
async def login_for_access_token(
    form_data: Annotated[OAuth2PasswordRequestForm, Depends()],
) -> Token:
    user = authenticate_user(fake_users_db, form_data.username, form_data.password)
    if not user:

Если вы хотите узнать больше об этих кодировках и полях форм, перейдите по ссылке [<abbr title="Mozilla Developer Network - Сеть разработчиков Mozilla">MDN</abbr> web docs for `POST`](https://developer.mozilla.org/en-US/docs/Web/HTTP/Methods/POST).

///

/// warning | Внимание

    public static EsStatusPostcard droppedInto(Postbox postbox, MPCall<EsStatusPostcard> postcardLambda) {
        EsStatusPostcard postcard = new EsStatusPostcard();
        postcardLambda.write(postcard);
        postbox.post(postcard);
        return postcard;
    }

    // ===================================================================================
    //                                                                           Meta Data

    current_user: User = Security(get_current_user, scopes=["me"]),
):
    if current_user.disabled:
        raise HTTPException(status_code=400, detail="Inactive user")
    return current_user


@app.post("/token")
async def login_for_access_token(
    form_data: OAuth2PasswordRequestForm = Depends(),
) -> Token:
    user = authenticate_user(fake_users_db, form_data.username, form_data.password)
    if not user:

Hepsi `localhost` üzerinde olsa bile, farklı protocol veya port kullandıkları için farklı "origin" sayılırlar.

## Adımlar { #steps }

Diyelim ki tarayıcınızda `http://localhost:8080` adresinde çalışan bir frontend’iniz var ve JavaScript’i, `http://localhost` adresinde çalışan bir backend ile iletişim kurmaya çalışıyor (port belirtmediğimiz için tarayıcı varsayılan port olan `80`’i kullanacaktır).

Angenommen, Sie haben ein Frontend, das in Ihrem Browser unter `http://localhost:8080` läuft, und dessen JavaScript versucht, mit einem Backend zu kommunizieren, das unter `http://localhost` läuft (da wir keinen Port angegeben haben, geht der Browser vom Default-Port `80` aus).

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`。

    current_user: Annotated[User, Depends(get_current_user)],
):
    if current_user.disabled:
        raise HTTPException(status_code=400, detail="Inactive user")
    return current_user


@app.post("/token")
async def login_for_access_token(
    form_data: Annotated[OAuth2PasswordRequestForm, Depends()],
) -> Token:
    user = authenticate_user(fake_users_db, form_data.username, form_data.password)
    if not user: