## Rewriting Responses

If transparent compression was used, OkHttp will drop the corresponding response headers `Content-Encoding` and `Content-Length` because they don’t apply to the decompressed response body.

If a conditional GET was successful, responses from the network and cache are merged as directed by the spec.

## Follow-up Requests

                operation.setdefault("responses", {}).setdefault(
                    status_code, {}
                ).setdefault("content", {}).setdefault(route_response_media_type, {})[
                    "schema"
                ] = response_schema
            if route.responses:
                operation_responses = operation.setdefault("responses", {})
                for (

# 自定义响应 - HTML，流，文件和其他

**FastAPI** 默认会使用 `JSONResponse` 返回响应。

你可以通过直接返回 `Response` 来重载它，参见 [直接返回响应](response-directly.md){.internal-link target=_blank}。

但如果你直接返回 `Response`，返回数据不会自动转换，也不会自动生成文档（例如，在 HTTP 头 `Content-Type` 中包含特定的「媒体类型」作为生成的 OpenAPI 的一部分）。

你还可以在 *路径操作装饰器* 中声明你想用的 `Response`。

你从 *路径操作函数* 中返回的内容将被放在该 `Response` 中。

      }
    }

    constructor(response: Response) {
      this.url = response.request.url
      this.varyHeaders = response.varyHeaders()
      this.requestMethod = response.request.method
      this.protocol = response.protocol
      this.code = response.code
      this.message = response.message
      this.responseHeaders = response.headers
      this.handshake = response.handshake

Por exemplo, você pode querer retornar uma *response* em *plain text* ao invés de um JSON para os seguintes erros:

{* ../../docs_src/handling_errors/tutorial004_py39.py hl[3:4,9:11,25] *}

/// note | Detalhes Técnicos

Você pode usar `from starlette.responses import PlainTextResponse`.

    with pytest.raises(FastAPIError):
        app = FastAPI()

        @app.get("/", responses={"500": {"model": NonPydanticModel}})
        def read_root():
            pass  # pragma: nocover


def test_invalid_response_model_sub_type_in_responses_raises():
    with pytest.raises(FastAPIError):
        app = FastAPI()

        @app.get("/", responses={"500": {"model": list[NonPydanticModel]}})
        def read_root():

def test_query(client: TestClient):
    response = client.post("/graphql", json={"query": "{ user { name, age } }"})
    assert response.status_code == 200
    assert response.json() == {"data": {"user": {"name": "Patrick", "age": 100}}}


def test_openapi(client: TestClient):
    response = client.get("/openapi.json")
    assert response.status_code == 200
    assert response.json() == {
        "info": {

///

## OpenAPI e documentação da API { #openapi-and-api-docs }

Se você retorna códigos de status adicionais e retornos diretamente, eles não serão incluídos no esquema do OpenAPI (a documentação da API), porque o FastAPI não tem como saber de antemão o que será retornado.

```

/// note | Технічні деталі

Ви також можете використовувати `from starlette.requests import Request` і `from starlette.responses import JSONResponse`.

**FastAPI** надає ті самі `starlette.responses`, що й `fastapi.responses`, просто для зручності розробника. Але більшість доступних відповідей надходять безпосередньо зі Starlette. Те ж саме стосується і `Request`.

///

        request.url(), chain.connection(), request.headers()));

    Response response = chain.proceed(request);

    long t2 = System.nanoTime();
    logger.info(String.format("Received response for %s in %.1fms%n%s",
        response.request().url(), (t2 - t1) / 1e6d, response.headers()));

    return response;
  }
}
```