Implement OAuth 2.0 Authorization Code flow using authlib in python flask web apps | Single Sign On

Blog post - https://nagasudhir.blogspot.com/2023/04/oauth-20-authorization-code-flow-for.html

OAuth 2.0 Authorization Code flow explained - https://youtu.be/K7aC4nZEepk
Introduction to OAuth 2.0 - https://youtu.be/W7yeiglv9mI
Setup Keycloak as OAuth 2.0 server in Windows for development and testing - https://youtu.be/vOsYE_rTikQ
Client credentials flow and JWT explained - https://youtu.be/V4j-cPJxRJs

In this video, we will learn how create a python flask web application that uses OAuth 2.0 Authorization code flow to authenticate and authorize users. We will use keycloak as a OAuth server in this example.

Table of contents - https://nagasudhir.blogspot.com/2020/04/taming-python-table-of-contents.html

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00:00 - Intro
00:42 - About OAuth 2.0 Authorization code flow
02:15 - Create user in OAuth server(Keycloak)
03:38 - Register web application in OAuth server(Keycloak)
05:13 - Create Flask web application
07:09 - Create OAuth client instance in flask application
09:54 - Login redirection endpoint
11:17 - Login callback endpoint
12:35 - Login user using flask session
14:06 - Render user information in the web page
17:13 - Logging out the user
22:23 - Add PKCE (Proof Code for Key Exchange) to workflow
23:23 - Outro

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