How to redirect if jwt is not presented in the request using Flask-jwt-extended

Question

Is there a built-in way to redirect to login page if user comes without JWT or wrong JWT is used?

@api.route('/private', methods=['GET'])
@jwt_required()
def protected():
  logged = get_jwt_identity()
  return jsonify(logged_in=logged), 200

Answer 1

Easiest solution would probably be to change the behavior for when no token is present via the unauthorized_loader. Something like:

@jwt.unauthorized_loader
def custom_unauthorized_response(_err):
    return redirect(url_for('login'))

If you needed some more fined grained control, you could use a before_request in conjunction with verify_jwt_in_request(). Or create your own custom decorator, something like:

def jwt_or_redirect():
    def wrapper(fn):
        @wraps(fn)
        def decorator(*args, **kwargs):
            verify_jwt_in_request(optional=True)
            if not get_jwt_identity():
                return redirect(url_for('login'))
            else:
                return fn(*args, **kwargs)

        return decorator

    return wrapper