rust - 如何设置 (Rust) Rocket API 端点模板响应的 HTTP 状态代码？

Question

我的 Rocket API 中有以下登录 POST 端点处理程序:

#[post("/login", data = "<login_form>")]
pub fn login_validate(login_form: Form<LoginForm>) -> Result<Redirect, Template> {
    let user = get_user(&login_form.username).unwrap();
    match user {
        Some(existing_user) => if verify(&login_form.password, &existing_user.password_hash).unwrap() {
            return Ok(Redirect::to(uri!(home)))
        },
        // we now hash (without verifying) just to ensure that the timing is the same
        None => {
            hash(&login_form.password, DEFAULT_COST);
        },
    };
    let mut response = Template::render("login", &LoginContext {
        error: Some(String::from("Invalid username or password!")),
    });
    // TODO: <<<<<<<<<< HOW CAN I SET AN HTTP STATUS CODE TO THE RESPONSE?
    Err(response)
}

我正在尝试设置 HTTP 状态响应代码，但我找不到正确的方法来执行此操作？最好用 200 以外的其他内容通知浏览器登录不成功。

Answer 1

来自Template docs (特别是 Responder 特征):

Returns a response with the Content-Type derived from the template's extension and a fixed-size body containing the rendered template. If rendering fails, an Err of Status::InternalServerError is returned.

尝试制作一个新的 Error派生 Responder 特征的枚举。而不是返回 Result<Redirect, Template> , 返回 Result<Redirect, Error>其中 Error看起来像这样:

#[derive(Debug, Responder)]
enum Error {
    #[response(status = 400)]
    BadRequest(Template),
    #[response(status = 404)]
    NotFound(Template),
}