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from datetime import datetime, timedelta
from jose import JWTError, jwt
from fastapi import HTTPException
from typing import Any, Union
#from tinydb import TinyDB, Query
#from tinydb.storages import MemoryStorage
# Secret key to encode JWT tokens. In production, use a more secure key and keep it secret!
SECRET_KEY = "a_very_secret_key"
ALGORITHM = "HS256"
ACCESS_TOKEN_EXPIRE_MINUTES = 30 # The expiration time for the access token
def encode_jwt(data: dict):
# Encode a JWT token
return jwt.encode(data, SECRET_KEY, algorithm=ALGORITHM)
def decode_jwt(token: str):
try:
# Decode a JWT token
return jwt.decode(token, SECRET_KEY, algorithms=[ALGORITHM])
except JWTError as e:
# Handle specific JWT errors (e.g., token expired, invalid token)
raise HTTPException(status_code=401, detail="Token is invalid or expired")
except Exception as e:
# Handle unexpected errors
raise HTTPException(status_code=500, detail="An error occurred while decoding token")
def create_access_token(data: dict, expires_delta: Union[timedelta, None] = None) -> str:
"""
Creates a JWT access token.
:param data: A dictionary of claims (e.g., {"sub": user_id}) to include in the token.
:param expires_delta: A timedelta object representing how long the token is valid.
:return: A JWT token as a string.
"""
to_encode = data.copy()
if expires_delta:
expire = datetime.utcnow() + expires_delta
else:
expire = datetime.utcnow() + timedelta(minutes=ACCESS_TOKEN_EXPIRE_MINUTES)
to_encode.update({"exp": expire})
encoded_jwt = jwt.encode(to_encode, SECRET_KEY, algorithm=ALGORITHM)
return encoded_jwt
# Additional functions can be added here for verifying tokens, decoding tokens, etc.
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