81 lines
2.8 KiB
Python
81 lines
2.8 KiB
Python
from datetime import datetime, timedelta, timezone
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from typing import Dict
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from jose import jwt, JWTError
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from common.config.app_settings import app_settings
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from fastapi import Depends, HTTPException
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from fastapi.security import OAuth2PasswordBearer
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from starlette.status import HTTP_401_UNAUTHORIZED
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class TokenManager:
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def __init__(self):
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self.secret_key = app_settings.JWT_SECRET_KEY
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self.algorithm = "HS256"
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self.access_token_expire_minutes = app_settings.ACCESS_TOKEN_EXPIRE_MINUTES
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self.refresh_token_expire_days = app_settings.REFRESH_TOKEN_EXPIRE_DAYS
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def create_access_token(self, subject: Dict[str, str]) -> str:
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"""
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Generates an access token with a short expiration time.
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"""
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expire = datetime.now(timezone.utc) + timedelta(
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minutes=self.access_token_expire_minutes
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)
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to_encode = subject.copy()
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to_encode.update({"exp": expire})
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return jwt.encode(to_encode, self.secret_key, algorithm=self.algorithm)
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def create_refresh_token(self, subject: Dict[str, str]) -> str:
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"""
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Generates a refresh token with a longer expiration time.
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"""
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expire = datetime.now(timezone.utc) + timedelta(
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days=self.refresh_token_expire_days
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)
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to_encode = subject.copy()
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to_encode.update({"exp": expire})
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return jwt.encode(to_encode, self.secret_key, algorithm=self.algorithm)
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def decode_token(self, token: str) -> Dict:
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"""
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Decodes a JWT token and returns the payload.
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"""
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try:
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payload = jwt.decode(token, self.secret_key, algorithms=[self.algorithm])
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return payload
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except JWTError:
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raise ValueError("Invalid token")
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def verify_refresh_token(self, token: str) -> bool:
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"""
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Verifies a refresh token to ensure it is valid and not expired.
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"""
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try:
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payload = self.decode_token(token)
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return True
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except ValueError:
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return False
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def refresh_access_token(self, refresh_token: str, subject: Dict[str, str]) -> str:
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"""
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Verifies the refresh token and creates a new access token.
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"""
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if self.verify_refresh_token(refresh_token):
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return self.create_access_token(subject)
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else:
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raise ValueError("Invalid refresh token")
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async def get_current_user(
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self, token: str = Depends(OAuth2PasswordBearer(tokenUrl="token"))
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) -> Dict:
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"""
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Extract and validate user information from the JWT token.
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"""
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try:
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payload = self.decode_token(token) # Decode JWT token
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return payload
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except ValueError:
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raise HTTPException(
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status_code=HTTP_401_UNAUTHORIZED, detail="Invalid or expired token"
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)
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