### Dependencies with `yield` and `StreamingResponse`, Technical Details { #dependencies-with-yield-and-streamingresponse-technical-details }

Before FastAPI 0.118.0, if you used a dependency with `yield`, it would run the exit code after the *path operation function* returned but right before sending the response.

Você pode ler mais na documentação em [Dependências com `yield` - Saída antecipada e `scope`](../tutorial/dependencies/dependencies-with-yield.md#early-exit-and-scope).

### Dependências com `yield` e `StreamingResponse`, Detalhes Técnicos { #dependencies-with-yield-and-streamingresponse-technical-details }

### Dependencias con `yield` y `StreamingResponse`, detalles técnicos { #dependencies-with-yield-and-streamingresponse-technical-details }

### Abhängigkeiten mit `yield` und `StreamingResponse`, Technische Details { #dependencies-with-yield-and-streamingresponse-technical-details }

{* ../../docs_src/custom_response/tutorial006c_py39.py hl[2,7,9] *}

### `StreamingResponse` { #streamingresponse }

Takes an async generator or a normal generator/iterator and streams the response body.

{* ../../docs_src/custom_response/tutorial007_py39.py hl[2,14] *}

#### Using `StreamingResponse` with file-like objects { #using-streamingresponse-with-file-like-objects }

{* ../../docs_src/custom_response/tutorial006c_py39.py hl[2,7,9] *}

### `StreamingResponse` { #streamingresponse }

Nimmt einen asynchronen Generator oder einen normalen Generator/Iterator und streamt den Responsebody.

{* ../../docs_src/custom_response/tutorial007_py39.py hl[2,14] *}

#### Verwendung von `StreamingResponse` mit dateiartigen Objekten { #using-streamingresponse-with-file-like-objects }

{* ../../docs_src/custom_response/tutorial006c_py39.py hl[2,7,9] *}

### `StreamingResponse` { #streamingresponse }

Принимает асинхронный генератор или обычный генератор/итератор и отправляет тело ответа потоково.

{* ../../docs_src/custom_response/tutorial007_py39.py hl[2,14] *}

#### Использование `StreamingResponse` с файлоподобными объектами { #using-streamingresponse-with-file-like-objects }

### `StreamingResponse` { #streamingresponse }

Recebe um gerador assíncrono ou um gerador/iterador comum e retorna o corpo da resposta de forma contínua (stream).

{* ../../docs_src/custom_response/tutorial007_py39.py hl[2,14] *}

#### Utilizando `StreamingResponse` com objetos semelhantes a arquivos { #using-streamingresponse-with-file-like-objects }

返回 HTTP 重定向。默认情况下使用 307 状态代码（临时重定向）。

{* ../../docs_src/custom_response/tutorial006.py hl[2,9] *}

### `StreamingResponse`

采用异步生成器或普通生成器/迭代器，然后流式传输响应主体。

{* ../../docs_src/custom_response/tutorial007.py hl[2,14] *}

#### 对类似文件的对象使用 `StreamingResponse`

如果您有类似文件的对象（例如，由 `open()` 返回的对象），则可以在 `StreamingResponse` 中将其返回。

包括许多与云存储，视频处理等交互的库。

{* ../../docs_src/custom_response/tutorial008.py hl[2,10:12,14] *}

import json

import pytest
from fastapi import BackgroundTasks, Depends, FastAPI
from fastapi.responses import StreamingResponse
from fastapi.testclient import TestClient

app = FastAPI()
state = {
    "/async": "asyncgen not started",
    "/sync": "generator not started",
    "/async_raise": "asyncgen raise not started",
    "/sync_raise": "generator raise not started",
    "context_a": "not started a",
    "context_b": "not started b",