101 lines
2.7 KiB
Python
101 lines
2.7 KiB
Python
import os
|
|
from datetime import datetime, timedelta, timezone
|
|
from typing import Optional
|
|
|
|
import bcrypt
|
|
from fastapi import Depends, HTTPException, Request, status
|
|
from jose import JWTError, jwt
|
|
from pydantic import BaseModel, EmailStr
|
|
from sqlalchemy import select
|
|
from sqlalchemy.ext.asyncio import AsyncSession
|
|
|
|
from database import get_db
|
|
from models import User
|
|
|
|
SECRET_KEY = os.environ["SECRET_KEY"] # Required - see .env.example
|
|
ALGORITHM = "HS256"
|
|
ACCESS_TOKEN_EXPIRE_MINUTES = 60 * 24 * 7 # 7 days
|
|
COOKIE_NAME = "auth_token"
|
|
|
|
|
|
class UserCredentials(BaseModel):
|
|
email: EmailStr
|
|
password: str
|
|
|
|
|
|
UserCreate = UserCredentials
|
|
UserLogin = UserCredentials
|
|
|
|
|
|
class UserResponse(BaseModel):
|
|
id: int
|
|
email: str
|
|
|
|
|
|
class TokenResponse(BaseModel):
|
|
access_token: str
|
|
token_type: str
|
|
user: UserResponse
|
|
|
|
|
|
def verify_password(plain_password: str, hashed_password: str) -> bool:
|
|
return bcrypt.checkpw(
|
|
plain_password.encode("utf-8"),
|
|
hashed_password.encode("utf-8"),
|
|
)
|
|
|
|
|
|
def get_password_hash(password: str) -> str:
|
|
return bcrypt.hashpw(
|
|
password.encode("utf-8"),
|
|
bcrypt.gensalt(),
|
|
).decode("utf-8")
|
|
|
|
|
|
def create_access_token(data: dict, expires_delta: Optional[timedelta] = None) -> str:
|
|
to_encode = data.copy()
|
|
expire = datetime.now(timezone.utc) + (expires_delta or timedelta(minutes=ACCESS_TOKEN_EXPIRE_MINUTES))
|
|
to_encode.update({"exp": expire})
|
|
return jwt.encode(to_encode, SECRET_KEY, algorithm=ALGORITHM)
|
|
|
|
|
|
async def get_user_by_email(db: AsyncSession, email: str) -> Optional[User]:
|
|
result = await db.execute(select(User).where(User.email == email))
|
|
return result.scalar_one_or_none()
|
|
|
|
|
|
async def authenticate_user(db: AsyncSession, email: str, password: str) -> Optional[User]:
|
|
user = await get_user_by_email(db, email)
|
|
if not user or not verify_password(password, user.hashed_password):
|
|
return None
|
|
return user
|
|
|
|
|
|
async def get_current_user(
|
|
request: Request,
|
|
db: AsyncSession = Depends(get_db),
|
|
) -> User:
|
|
credentials_exception = HTTPException(
|
|
status_code=status.HTTP_401_UNAUTHORIZED,
|
|
detail="Invalid authentication credentials",
|
|
)
|
|
|
|
token = request.cookies.get(COOKIE_NAME)
|
|
if not token:
|
|
raise credentials_exception
|
|
|
|
try:
|
|
payload = jwt.decode(token, SECRET_KEY, algorithms=[ALGORITHM])
|
|
user_id_str = payload.get("sub")
|
|
if user_id_str is None:
|
|
raise credentials_exception
|
|
user_id = int(user_id_str)
|
|
except (JWTError, ValueError):
|
|
raise credentials_exception
|
|
|
|
result = await db.execute(select(User).where(User.id == user_id))
|
|
user = result.scalar_one_or_none()
|
|
if user is None:
|
|
raise credentials_exception
|
|
return user
|
|
|