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from fastapi import Depends, APIRouter, status, HTTPException
from fastapi.security import OAuth2PasswordRequestForm
from fastapi.responses import Response, JSONResponse
from datetime import timedelta
from typing import Annotated
from app.util.authentication import (
create_access_token,
authenticate_user,
refresh_get_current_user,
)
from app.schemas.auth_schemas import Token, User
from app.util.db_dependency import get_db
router = APIRouter(prefix="/auth", tags=["auth"])
@router.post("/token", summary="Authenticate and get an access token")
async def login_for_access_token(
form_data: Annotated[OAuth2PasswordRequestForm, Depends()],
response: Response,
db=Depends(get_db),
):
"""
Return an access token for the user, if the given authentication details are correct
"""
user = authenticate_user(db, form_data.username, form_data.password)
if not user:
raise HTTPException(
status_code=status.HTTP_401_UNAUTHORIZED,
detail="Incorrect username or password",
headers={"WWW-Authenticate": "Bearer"},
)
access_token_expires = timedelta(minutes=1)
access_token = create_access_token(
data={"sub": user.id, "username": user.username, "refresh": False},
expires_delta=access_token_expires,
)
# Create a refresh token - just an access token with a longer expiry
# and more restrictions ("refresh" is True)
refresh_token_expires = timedelta(days=1)
refresh_token = create_access_token(
data={"sub": user.id, "username": user.username, "refresh": True},
expires_delta=refresh_token_expires,
)
response = JSONResponse(content={"success": True})
response.set_cookie(key="access_token", value=access_token, httponly=True)
response.set_cookie(
key="refresh_token", value=refresh_token, httponly=True
)
return response
# Full native JWT support is not complete in FastAPI yet :(
# Part of that is token refresh, so we must implement it ourselves
@router.post("/refresh")
async def refresh_access_token(
current_user: Annotated[User, Depends(refresh_get_current_user)],
response: Response,
) -> Token:
"""
Return a new access token if the refresh token is valid
"""
access_token_expires = timedelta(minutes=1)
access_token = create_access_token(
data={"sub": current_user.id, "refresh": False},
expires_delta=access_token_expires,
)
response = JSONResponse(content={"success": True})
response.set_cookie(key="access_token", value=access_token, httponly=True)
return response
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