Strange behavior when call is made from ajax, other domain

Hi! I have a project where front-end(React) and back-end(Flask) are working on different domains.

I added the following test end-point:

@test _api.route('/test')
class test_route(Resource):
    @jwt_required
    def get(self):
        return jsonify({'result': True})

It’s working properly if I provide a valid access token (in header, as I can’t use it in the cookie).

But if it’s not provided, or it’s wrong I can’t make the following handler work right:

@jwt.unauthorized_loader
def unauthorized_loader_handler(message):
    return jsonify({
            "description": "Access token not found!",
            "error": "unauthorized_loader"
        }, 401)

in a case of unauthorized loader and get into this handler but right after the exception is thrown:

Server-side ERROR: ‘Response’ object has no attribute ‘get’

I just want it to return status 401 to the front-end.

[0xbart]

This is one of the options that should work with Flask-restx.

1. Uncomment the private function _set_error_handler_callbacks(api).
2. Add default handler for all JWTExtendedExtension

Example

import pathlib

from flask import Flask
from flask_restx import Api
from flask_jwt_extended import JWTManager
from flask_jwt_extended.exceptions import JWTExtendedException

def create_app():
    app = Flask(__name__)
    app.config.from_pyfile(pathlib.Path(__file__).parent / "config.py")

    api = Api(app)
    jwt = JWTManager()
    
    @api.errorhandler(JWTExtendedException)
    def handle_jwt_exceptions(error):
        return {'message': str(error)}, getattr(error, 'code', 401)

    jwt.init_app(app)

[adrianbeloqui]

Thanks @0xbart !

While upgrading my app and moving from flask_restplus to flask_restx the option 1 (which was working with flask_restplus) was only working when running tox to test the app, but not when running the server for some reason.

The option 2 did the trick for me on both. Much appreciated!