91 lines
2.7 KiB
Python
91 lines
2.7 KiB
Python
from datetime import datetime, timedelta
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from typing import Optional
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from fastapi import Depends, HTTPException, status
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from fastapi.security import OAuth2PasswordBearer
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from jose import JWTError, jwt
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from passlib.context import CryptContext
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from pydantic import ValidationError
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from bson import ObjectId
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from .database import get_db
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from .models import TokenData, User, UserInDB
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# to get a string like this run:
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# openssl rand -hex 32
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SECRET_KEY = "YOUR_SECRET_KEY_HERE"
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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="token")
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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(db, username: str) -> Optional[UserInDB]:
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user_dict = db.users.find_one({"username": username})
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if user_dict:
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return UserInDB(**user_dict)
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def authenticate_user(db, username: str, password: str) -> Optional[UserInDB]:
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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):
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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(token: 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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username: str = payload.get("sub")
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if username is None:
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raise credentials_exception
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token_data = TokenData(username=username)
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except (JWTError, ValidationError):
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raise credentials_exception
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db = get_db()
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user = get_user(db, username=token_data.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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async def get_current_active_user(current_user: User = Depends(get_current_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 create_user(db, user: UserInDB):
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user_dict = user.model_dump(exclude={"id"})
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user_dict["_id"] = ObjectId()
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result = db.users.insert_one(user_dict)
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new_user = db.users.find_one({"_id": result.inserted_id})
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return UserInDB(**new_user)
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