Last Updated: August 21, 2017

Flask JWT optional authentication

The problem is when using Flask-JWT the currentidentity is not push to the context stack which means that even the user passes a token the currentidentity is None, you can fix this using this decorator

from flask_jwt import _jwt
from flask import _request_ctx_stack
from functools import wraps
import jwt

def jwt_optional(realm=None):
 def wrapper(fn):
 @wraps(fn)
 def decorator(*args, **kwargs):
 token = _jwt.request_callback()
 try:
 payload = _jwt.jwt_decode_callback(token)
 except jwt.exceptions.DecodeError:
 pass
 else:
 _request_ctx_stack.top.current_identity = _jwt.identity_callback(payload)
 return fn(*args, **kwargs)
 return decorator
 return wrapper

or even better, register a callback to before request

@app.before_request
def push_to_ctx():
 token = _jwt.request_callback()
 try:
 payload = _jwt.jwt_decode_callback(token)
 except jwt.exceptions.DecodeError:
 pass
 else:
 _request_ctx_stack.top.current_identity = _jwt.identity_callback(payload)

#python

#flask

#jwt