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FastAPIでBearerトークンを抽出する

Last updated at Posted at 2021-12-30

小ネタ。

FastAPIでAuthorization: Bearer {token}のようにヘッダで送られてくるトークンを使って認証したい場合に、トークン取得処理の自前実装が不要になる。

コード

Dependsを使ってDIチックに処理できるので嬉しい

dependencies.py
from fastapi import Request, Depends
from fastapi.security import HTTPBearer, HTTPAuthorizationCredentials


async def get_bearer_token(
    request: Request,
    authorization: HTTPAuthorizationCredentials = Depends(HTTPBearer())
) -> str:
    token = authorization.credentials
    return token

await bearer(request)としている部分は、HTTPBearerクラスの__call__が該当処理。
ソースコード: fastapi/http.py at master · tiangolo/fastapi

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