Flask user handler blueprint

Lightweight Flask blueprint that provides all the user handling features that are required by a web application in a database-independent way, including:

• User registration, login and session management.
• Password reset functionality with JWTs.
• Automatic, safe password handling using Argon2.

The blueprint provides the following routes for a web application: /login, /logout, /register, /request_password_reset, /reset/<token> and /verify/<token>. All these routes interact with the user database through an instance of the UserHandler class that is a decorator-based database interface, similar in style to Flask-Login's LoginManager. All the blueprint routes are backed by ready-to-use HTML templates that are formatted using BlueprintJS.

Installation

The project is available on PyPI as user-blueprint, you can install it with pip install user-blueprint.

How to use

The blueprint requires the following components to be configured:

• blueprint.user_handler: See the documentation of the UserHandler class for the details.
• LoginManager: This Flask-Login component handles the session management of the Flask application. You need to create an instance of this class and configure it according to the documentation of Flask-Login.

A working demo Flask application showing all the required configuration is included in the library, see demo.py.

Dependencies

The library requires the following dependencies to be installed besides Flask itself.

• Flask-Login: User session management.
• Flask-WTF: WTForms integration for Flask.
• Passlib: Password hashing and verification.
• PyJWT: JSON Web Token implementation in Python.
• Argon2_cffi: The preferred Argon2 backend for Passlib. See Passlib's documentation for more options.

License - MIT

The library is open-sourced under the conditions of the MIT license.

Credit

Miguel Grinberg's Flask Mega-Tutorial