107 lines
3.5 KiB
Python
107 lines
3.5 KiB
Python
from typing import Optional
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from datetime import datetime, timedelta
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from fastapi import APIRouter, Depends, HTTPException, Response, status
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from fastapi.security import OAuth2PasswordBearer, OAuth2PasswordRequestForm
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from jose import jwt, JWTError
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from passlib.context import CryptContext
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from pydantic import BaseModel, EmailStr, validator
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from core.database import fake_users_db
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from core.config import settings
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router = APIRouter()
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# Password hashing utility
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pwd_context = CryptContext(schemes=["bcrypt"], deprecated="auto")
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# JWT utilities
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oauth2_scheme = OAuth2PasswordBearer(tokenUrl="/login")
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SECRET_KEY = settings.SECRET_KEY
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ALGORITHM = settings.ALGORITHM
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ACCESS_TOKEN_EXPIRE_MINUTES = settings.ACCESS_TOKEN_EXPIRE_MINUTES
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REFRESH_TOKEN_EXPIRE_MINUTES = settings.REFRESH_TOKEN_EXPIRE_MINUTES
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# User model
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class User(BaseModel):
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username: str
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email: EmailStr
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disabled: bool = False
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@validator('username')
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def username_alphanumeric(cls, v):
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assert v.isalnum(), 'Username must be alphanumeric'
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return v
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# Token data model
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class TokenData(BaseModel):
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username: str = None
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# Utility functions
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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(username: str):
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user_data = fake_users_db.get(username)
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if user_data:
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user = User(**user_data)
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return user
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def authenticate_user(username: str, password: str):
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user = get_user(username)
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if not user:
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return False
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if not verify_password(password, user.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: Optional[timedelta] = 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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def create_refresh_token(data: dict, expires_delta: Optional[timedelta] = 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(days=7)
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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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@router.post("/login")
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async def login_person(response: Response, form_data: OAuth2PasswordRequestForm = Depends()):
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"""Demo login endpoint"""
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user = authenticate_user(form_data.username, form_data.password)
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if not user:
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raise HTTPException(
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status_code=status.HTTP_401_UNAUTHORIZED,
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detail="Incorrect username or password",
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headers={"WWW-Authenticate": "Bearer"},
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)
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access_token_expires = timedelta(minutes=ACCESS_TOKEN_EXPIRE_MINUTES)
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access_token = create_access_token(
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data={"sub": user.username}, expires_delta=access_token_expires
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)
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refresh_token_expires = timedelta(minutes=REFRESH_TOKEN_EXPIRE_MINUTES)
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refresh_token = create_refresh_token(
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data={"sub": user.username}, expires_delta=refresh_token_expires
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)
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response.set_cookie(
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key="access_token", value=f"Bearer {access_token}", httponly=True
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)
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response.set_cookie(
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key="refresh_token", value=f"Bearer {refresh_token}", httponly=True
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)
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return {"message": "Login successful", "access_token": access_token, "refresh_token": refresh_token} |