99 lines
3.2 KiB
Python
99 lines
3.2 KiB
Python
from datetime import datetime, timedelta
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from typing import Annotated, Union
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from fastapi import Depends, FastAPI, HTTPException, status
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from fastapi.security import OAuth2PasswordBearer, OAuth2PasswordRequestForm
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from jose import JWTError, jwt
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from passlib.context import CryptContext
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from sqlalchemy.orm import Session
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from sqlalchemy import select
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from .db import Session, database
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from . import models, schemas
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SECRET_KEY = "SECRET"
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ALGORITHM = "HS256"
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ACCESS_TOKEN_EXPIRE_MINUTES = 30
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pwd_context = CryptContext(schemes=["bcrypt"], deprecated="auto")
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oauth2_scheme = OAuth2PasswordBearer(tokenUrl="/api/token")
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def get_db():
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db = database
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try:
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yield db
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finally:
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db.close()
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def verify_password(plain_password, hashed_password):
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return pwd_context.verify(plain_password, hashed_password)
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def get_password_hash(password):
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return pwd_context.hash(password)
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def get_user_by_nickname(db: Annotated[Session, Depends(get_db)], nickname: str):
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user_with_required_id = db.query(models.User).filter(models.User.nickname == nickname).first()
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if user_with_required_id:
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return user_with_required_id
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return None
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def get_user_by_id(db: Annotated[Session, Depends(get_db)], user_id: int):
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user_with_required_id = db.query(models.User).filter(models.User.id == user_id).first()
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if user_with_required_id:
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return user_with_required_id
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return None
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def authenticate_user(db: Annotated[Session, Depends(get_db)], nickname: str, password: str):
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user = get_user_by_nickname(db=db, nickname=nickname)
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if not user:
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return False
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if not verify_password(password, user.hashed_password):
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return False
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return user
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def create_access_token(data: dict, expires_delta: Union[timedelta, None] = None):
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to_encode = data.copy()
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if expires_delta:
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expire = datetime.utcnow() + expires_delta
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else:
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expire = datetime.utcnow() + timedelta(minutes=15)
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to_encode.update({"exp": expire})
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encoded_jwt = jwt.encode(to_encode, SECRET_KEY, algorithm=ALGORITHM)
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return encoded_jwt
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async def get_current_user(db: Annotated[Session, Depends(get_db)], token: Annotated[str, Depends(oauth2_scheme)]):
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credentials_exception = HTTPException(
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status_code=status.HTTP_401_UNAUTHORIZED,
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detail="Could not validate credentials",
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headers={"WWW-Authenticate": "Bearer"},
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)
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try:
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payload = jwt.decode(token, SECRET_KEY, algorithms=[ALGORITHM])
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user_id: int = payload.get("user_id")
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if user_id is None:
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raise credentials_exception
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token_data = schemas.TokenData(user_id=user_id)
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except JWTError:
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raise credentials_exception
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user = get_user_by_id(db, user_id=token_data.user_id)
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if user is None:
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raise credentials_exception
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return schemas.User(id=user.id, nickname=user.nickname, name=user.name, surname=user.surname, disabled=user.disabled, items=user.announcements)
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async def get_current_active_user(
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current_user: Annotated[schemas.User, Depends(get_current_user)]
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):
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if current_user.disabled:
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raise HTTPException(status_code=400, detail="Inactive user")
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return current_user
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