f1c2b73ade
- Set up FastAPI project structure with SQLite and SQLAlchemy - Create models for users, books, authors, categories, and orders - Implement JWT authentication and authorization - Add CRUD endpoints for all resources - Set up Alembic for database migrations - Add health check endpoint - Add proper error handling and validation - Create comprehensive documentation
107 lines
3.3 KiB
Python
107 lines
3.3 KiB
Python
from datetime import datetime, timedelta
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from typing import Optional
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from jose import JWTError, jwt
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from passlib.context import CryptContext
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from fastapi import Depends, HTTPException, status
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from fastapi.security import OAuth2PasswordBearer
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from sqlalchemy.orm import Session
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from app.core.config import settings
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from app.db.database import get_db
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from app.models.user import User
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from app.api.schemas.user import UserInDB
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# Password hashing context
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pwd_context = CryptContext(schemes=["bcrypt"], deprecated="auto")
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# OAuth2 password bearer token
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oauth2_scheme = OAuth2PasswordBearer(tokenUrl="/api/users/login")
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# JWT constants
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SECRET_KEY = settings.SECRET_KEY
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ALGORITHM = "HS256"
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ACCESS_TOKEN_EXPIRE_MINUTES = settings.ACCESS_TOKEN_EXPIRE_MINUTES
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def verify_password(plain_password: str, hashed_password: str) -> bool:
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"""Verify a password against a hash."""
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return pwd_context.verify(plain_password, hashed_password)
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def get_password_hash(password: str) -> str:
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"""Generate a password hash."""
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return pwd_context.hash(password)
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def get_user(db: Session, username: str) -> Optional[UserInDB]:
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"""Get a user by username from the database."""
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user = db.query(User).filter(User.username == username).first()
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if user:
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return UserInDB.model_validate(user.__dict__)
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return None
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def authenticate_user(db: Session, username: str, password: str) -> Optional[UserInDB]:
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"""Authenticate a user with username and password."""
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user = get_user(db, username)
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if not user:
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return None
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if not verify_password(password, user.hashed_password):
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return None
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return user
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def create_access_token(data: dict, expires_delta: Optional[timedelta] = None) -> str:
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"""Create a JWT access token."""
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to_encode = data.copy()
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expire = datetime.utcnow() + (
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expires_delta
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if expires_delta
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else timedelta(minutes=ACCESS_TOKEN_EXPIRE_MINUTES)
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)
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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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def get_current_user(
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token: str = Depends(oauth2_scheme), db: Session = Depends(get_db)
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) -> UserInDB:
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"""Get the current authenticated user from the token."""
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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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username: str = payload.get("sub")
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if username is None:
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raise credentials_exception
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except JWTError:
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raise credentials_exception
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user = get_user(db, username=username)
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if user is None:
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raise credentials_exception
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return user
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def get_current_active_user(
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current_user: UserInDB = Depends(get_current_user),
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) -> UserInDB:
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"""Get the current active user."""
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if not current_user.is_active:
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raise HTTPException(status_code=400, detail="Inactive user")
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return current_user
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def get_current_admin_user(
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current_user: UserInDB = Depends(get_current_active_user),
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) -> UserInDB:
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"""Get the current admin user."""
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if not current_user.is_admin:
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raise HTTPException(
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status_code=status.HTTP_403_FORBIDDEN, detail="Insufficient permissions"
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)
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return current_user
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