```JSON
{"message": "Oops! yolo did something. There goes a rainbow..."}
```

!!! note "📡 ℹ"
    👆 💪 ⚙️ `from starlette.requests import Request` & `from starlette.responses import JSONResponse`.

    **FastAPI** 🚚 🎏 `starlette.responses` `fastapi.responses` 🏪 👆, 👩‍💻. ✋️ 🌅 💪 📨 👟 🔗 ⚪️➡️ 💃. 🎏 ⏮️ `Request`.

## 🔐 🔢 ⚠ 🐕‍🦺

**FastAPI** ✔️ 🔢 ⚠ 🐕‍🦺.

Il inclut les `tags`, `parameters`, `requestBody`, `responses`, etc.

Ce schéma OpenAPI spécifique aux *operations* est normalement généré automatiquement par **FastAPI**, mais vous pouvez également l'étendre.

!!! tip "Astuce"
    Si vous avez seulement besoin de déclarer des réponses supplémentaires, un moyen plus pratique de le faire est d'utiliser les [réponses supplémentaires dans OpenAPI](additional-responses.md){.internal-link target=_blank}.

client = TestClient(app)


def test_redirect_status_code():
    response = client.get("/pydantic", follow_redirects=False)
    assert response.status_code == 302
    assert response.headers["location"] == "https://docs.pydantic.dev/"


def test_openapi_schema():
    response = client.get("/openapi.json")
    assert response.status_code == 200, response.text
    assert response.json() == {
        "openapi": "3.1.0",

    with path.open("rb") as file:
        response = client.post("/uploadfile/", files={"file": file})
    assert response.status_code == 200, response.text
    assert response.json() == {"filename": "test.txt"}


def test_openapi_schema():
    response = client.get("/openapi.json")
    assert response.status_code == 200, response.text
    assert response.json() == {
        "openapi": "3.1.0",

        response = client.post("/uploadfile/", files={"file": file})
    assert response.status_code == 200, response.text
    assert response.json() == {"filename": "test.txt"}


def test_openapi_schema():
    response = client.get("/openapi.json")
    assert response.status_code == 200, response.text
    assert response.json() == {
        "openapi": "3.1.0",

		"If true, Pilot will cache XDS responses.").Get()

	// EnableCDSCaching determines if CDS caching is enabled. This is explicitly split out of ENABLE_XDS_CACHE,
	// so that in case there are issues with the CDS cache we can just disable the CDS cache.
	EnableCDSCaching = env.Register("PILOT_ENABLE_CDS_CACHE", true,
		"If true, Pilot will cache CDS responses. Note: this depends on PILOT_ENABLE_XDS_CACHE.").Get()

{"message": "Oops! yolo did something. There goes a rainbow..."}

```

!!! note "技术细节"

    `from starlette.requests import Request` 和 `from starlette.responses import JSONResponse` 也可以用于导入 `Request` 和 `JSONResponse`。

    **FastAPI** 提供了与 `starlette.responses` 相同的 `fastapi.responses` 作为快捷方式，但大部分响应操作都可以直接从 Starlette 导入。同理，`Request` 也是如此。


## 覆盖默认异常处理器

**FastAPI** 自带了一些默认异常处理器。

    with path.open("rb") as file:
        response = client.post("/uploadfile/", files={"file": file})
    assert response.status_code == 200, response.text
    assert response.json() == {"filename": "test.txt"}


@needs_py39
def test_openapi_schema(client: TestClient):
    response = client.get("/openapi.json")
    assert response.status_code == 200, response.text
    assert response.json() == {
        "openapi": "3.1.0",

def test_get_invalid_one_header_items():
    response = client.get("/items/", headers={"X-Token": "invalid"})
    assert response.status_code == 400, response.text
    assert response.json() == {"detail": "X-Token header invalid"}


def test_get_invalid_one_users():
    response = client.get("/users/", headers={"X-Token": "invalid"})
    assert response.status_code == 400, response.text
    assert response.json() == {"detail": "X-Token header invalid"}

from fastapi import FastAPI
from fastapi.responses import RedirectResponse

app = FastAPI()


@app.get("/pydantic", response_class=RedirectResponse, status_code=302)
async def redirect_pydantic():