participant client as Client
participant handler as Exception handler
participant dep as Dep with yield
participant operation as Path Operation
participant tasks as Background tasks

    Note over client,operation: Can raise exceptions, including HTTPException
    client ->> dep: Start request
    Note over dep: Run code up to yield
    opt raise Exception
        dep -->> handler: Raise Exception

    client ->> dep: Startet den Request
    Note over dep: Führt den Code bis zum yield aus
    opt Löst Exception aus
        dep -->> handler: Löst Exception aus
        handler -->> client: HTTP-Error-Response
    end
    dep ->> operation: Führt Abhängigkeit aus, z. B. DB-Session
    opt Löst aus
        operation -->> dep: Löst Exception aus (z. B. HTTPException)
        opt Handhabt

    client ->> dep: Iniciar requisição
    Note over dep: Executar código até o yield
    opt lançar Exceção
        dep -->> handler: lançar Exceção
        handler -->> client: resposta de erro HTTP
    end
    dep ->> operation: Executar dependência, e.g. sessão de BD
    opt raise
        operation -->> dep: Lançar exceção (e.g. HTTPException)
        opt handle

FastAPI 0.106.0 이전에는 `yield` 이후에 예외를 발생시키는 것이 불가능했습니다. `yield`가 있는 의존성의 종료 코드는 응답이 전송된 *후에* 실행되었기 때문에, [예외 핸들러](../tutorial/handling-errors.md#install-custom-exception-handlers)가 이미 실행된 뒤였습니다.

이는 주로 백그라운드 태스크 안에서 의존성이 "yield"한 동일한 객체들을 사용할 수 있게 하기 위한 설계였습니다. 백그라운드 태스크가 끝난 뒤에 종료 코드가 실행되었기 때문입니다.

이는 응답이 네트워크를 통해 전달되기를 기다리는 동안 리소스를 점유하지 않기 위한 의도로 FastAPI 0.106.0에서 변경되었습니다.

/// tip | 팁

在 FastAPI 0.106.0 之前，`yield` 之后抛出异常是不可行的，因为带 `yield` 的依赖项中的退出代码会在响应发送之后才执行，此时[异常处理器](../tutorial/handling-errors.md#install-custom-exception-handlers)已经运行完毕。

之所以这样设计，主要是为了允许在后台任务中继续使用依赖项通过 `yield`“产出”的对象，因为退出代码会在后台任务完成之后才执行。

在 FastAPI 0.106.0 中，这一行为被修改，目的是避免在等待响应通过网络传输时一直占用资源。

/// tip | 提示

另外，后台任务通常是一段独立的逻辑，应该单独处理，并使用它自己的资源（例如它自己的数据库连接）。

### 背景任務與含有 `yield` 的相依，技術細節 { #background-tasks-and-dependencies-with-yield-technical-details }

在 FastAPI 0.106.0 之前，不可能在 `yield` 之後拋出例外；含有 `yield` 的相依的結束程式碼會在回應送出之後才執行，因此[例外處理器](../tutorial/handling-errors.md#install-custom-exception-handlers) 早就已經跑完了。

當初這樣設計主要是為了允許在背景任務中使用由相依「yield」出來的同一組物件，因為結束程式碼會在背景任務結束後才執行。

在 FastAPI 0.106.0 中，這個行為被修改，目的是在等待回應穿越網路的期間，不要持有資源。

/// tip | 提示

此外，背景任務通常是一組獨立的邏輯，應該用自己的資源（例如自己的資料庫連線）來處理。

- Fixed missing delete events on informer re-lists to ensure all delete events were correctly emitted and using the latest known object state, so that all event handlers and stores always reflect the actual apiserver state as best as possible ([#115620](https://github.com/kubernetes/kubernetes/pull/115620), [@odinuge](https://github.com/odinuge))

- Fixed an issue with stuck connections handling error responses ([#71412](https://github.com/kubernetes/kubernetes/pull/71412), [@liggitt](https://github.com/liggitt))
- apiserver: fixed handling and logging of panics in REST handlers ([#71076](https://github.com/kubernetes/kubernetes/pull/71076), [@liggitt](https://github.com/liggitt))

* apiserver: fixes handling and logging of panics in REST handlers to prevent crashes ([#71076](https://github.com/kubernetes/kubernetes/pull/71076), [@liggitt](https://github.com/liggitt))

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