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I'm currently working my way through Web development with flask. I want to build a webapp with flask as backend and angular.js at the frontend. The Json part is straight forward, and my first steps work out well. But now I got stuck with User Authentication. I read a lot but found out, that WTFForms works not as well with angular (without the CSFR Token), so i can not use something like flask-security.
What is a proper way or maybe the best pratice for implementing User authentication with Angular und Flask? (Maybe someone knows a good example app I can learn from by example)
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To do this, you need to implement an authentication middleware. Middlewares are created in Flask by creating a decorator; a function can have multiple middlewares, and the order matters a lot. You need to add a secret key to your application; this is what you should pass to JWT.
When your users need to log in, your Angular application triggers an authentication event, which it handles by redirecting them to a customizable Auth0 login page. Once your users log in successfully, Auth0 redirects them back to your Angular application, returning tokens with their authentication and user information.
I have written several tutorials on RESTful APIs with Flask, all with examples that are ready to use:
http://blog.miguelgrinberg.com/category/REST
The tutorials are:
Designing a RESTful API with Python and Flask
This is a simple RESTful API written in Flask, with authentication.
Writing a Javascript REST client
In this one I implement a Javascript client for the API built in the first tutorial. Here you can see how the client authenticates. I used Knockout instead of Angular for the client, but the principles are the same.
Designing a RESTful API using Flask-RESTful
This one is another way to write the server, using the Flask-RESTful extension to simplify some tasks.
RESTful Authentication with Flask
This is a tutorial specifically dedicated to authentication.
I hope they are useful.
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