Spring Boot and OAuth2

Sample app doing various things with “social login” using OAuth 2.0 and Spring Boot.

There are several samples building on each other, adding new features at each step:

• simple: a very basic static app with just a home page and unconditional login via Spring Boot’s OAuth 2.0 configuration properties (if you visit the home page, you will be automatically redirected to GitHub).

• click: adds an explicit link that the user has to click to login.

• logout: adds a logout link as well for authenticated users.

• two-providers: adds a second login provider so the user can choose on the home page which one to use.

• custom-error: adds an error message for unauthenticated users, and a custom authentication based on GitHub’s API.