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Description:

fastapioidcbackend 0.5.0

FastAPI Resource Backend
Build an OIDC resource server using FastAPI.
Your aplication receives the claims decoded from the access token.
Fork of fastapi-resource-server
Usage
Run keycloak on port 8888:
docker container run --name auth-server -d -p 8080:8080 \
-e KEYCLOAK_USER=admin -e KEYCLOAK_PASSWORD=admin \
quay.io/keycloak/keycloak:latest

Install dependencies
pip install fastapi fastapi_oidc_backend uvicorn

Create the main.py module
from contextlib import asynccontextmanager
from fastapi import Depends, FastAPI, Security
from pydantic import BaseModel

from fastapi_oidc_backend.security import OidcResourceServer
from fastapi_oidc_backend.models import JwtKwargs

oidc_config = JwtKwargs(audience="myclient", issuer="http://localhost:8888/realms/myrealm")

@asynccontextmanager
async def app_startup(_app: FastAPI):
await auth_scheme.load_configuration()
yield

app = FastAPI(lifespan=app_startup,
swagger_ui_init_oauth={
"clientId": oidc_config.audience,
"usePkceWithAuthorizationCodeGrant": True
})
auth_scheme = OidcResourceServer(
oidc_config,
scheme_name="Keycloak",
)

class User(BaseModel):
username: str
given_name: str
family_name: str
email: str

def get_current_user(claims: dict = Security(auth_scheme)):
claims.update(username=claims["preferred_username"])
user = User.parse_obj(claims)
return user

@app.get("/users/me")
def read_current_user(current_user: User = Depends(get_current_user)):
return current_user

Run the application
uvicorn main:app