from fastapi import Depends, FastAPI
from fastapi.security import OAuth2PasswordBearer
from typing_extensions import Annotated

app = FastAPI()

oauth2_scheme = OAuth2PasswordBearer(tokenUrl="token")


@app.get("/items/")
async def read_items(token: Annotated[str, Depends(oauth2_scheme)]):

from typing import Annotated

from fastapi import Depends, FastAPI
from fastapi.security import OAuth2PasswordBearer

app = FastAPI()

oauth2_scheme = OAuth2PasswordBearer(tokenUrl="token")


@app.get("/items/")
async def read_items(token: Annotated[str, Depends(oauth2_scheme)]):

* Ein optionales `client_secret` (benötigen wir für unser Beispiel nicht).

/// info

`OAuth2PasswordRequestForm` ist keine spezielle Klasse für **FastAPI**, so wie `OAuth2PasswordBearer`.

`OAuth2PasswordBearer` lässt **FastAPI** wissen, dass es sich um ein Sicherheitsschema handelt. Daher wird es auf diese Weise zu OpenAPI hinzugefügt.

import pytest
from fastapi.testclient import TestClient

from ...utils import needs_py39


@pytest.fixture(name="client")
def get_client():
    from docs_src.extra_models.tutorial004_py39 import app

    client = TestClient(app)
    return client


@needs_py39
def test_get_items(client: TestClient):
    response = client.get("/items/")
    assert response.status_code == 200, response.text
    assert response.json() == [

Utilities to handle OpenAPI automatic UI documentation, including Swagger UI (by default at `/docs`) and ReDoc (by default at `/redoc`).

::: fastapi.openapi.docs.get_swagger_ui_html

::: fastapi.openapi.docs.get_redoc_html

::: fastapi.openapi.docs.get_swagger_ui_oauth2_redirect_html

from fastapi import FastAPI
from fastapi.responses import JSONResponse

app = FastAPI()


@app.get("/headers/")
def get_headers():
    content = {"message": "Hello World"}
    headers = {"X-Cat-Dog": "alone in the world", "Content-Language": "en-US"}

## 🏎.🅾 ↗️

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import pytest
from fastapi.exceptions import FastAPIError
from fastapi.testclient import TestClient


@pytest.fixture(name="client")
def get_client():
    from docs_src.dependencies.tutorial008c import app

    client = TestClient(app)
    return client


def test_get_no_item(client: TestClient):
    response = client.get("/items/foo")
    assert response.status_code == 404, response.text

from typing import Optional

from dirty_equals import IsDict
from fastapi import FastAPI
from fastapi.responses import JSONResponse
from fastapi.testclient import TestClient
from pydantic import BaseModel

app = FastAPI()


class Item(BaseModel):
    name: str
    price: Optional[float] = None


@app.api_route("/items/{item_id}", methods=["GET"])
def get_items(item_id: str):
    return {"item_id": item_id}

`BackgroundTasks` 클래스는 FastAPI에서 직접 임포트하거나 포함하기 때문에 실수로 `BackgroundTask` (끝에 `s`가 없음)을 임포트하더라도 starlette.background에서 `BackgroundTask`를 가져오는 것을 방지할 수 있습니다.

(`BackgroundTask`가 아닌) `BackgroundTasks`를 사용하면, _경로 작동 함수_ 매개변수로 사용할 수 있게 되고 나머지는 **FastAPI**가 대신 처리하도록 할 수 있습니다. 이것은 `Request` 객체를 직접 사용하는 것과 같은 방식입니다.