Spring Security for N00bz: A quick introduction for the terminally insecure
summary
Live-coding shows how to add Spring Security to a Spring Boot app: enable HTTP firewall and security filter chain, add form login with an in‑memory UserDetailsService, fix plain‑text passwords by adding a bcrypt delegating password encoder, and require role checks for /admin; demo runs and forbids non‑admin users. Then OAuth2/OpenID Connect logins via Google and Okta are wired, a resource server validates JWTs and returns claims, and a WebClient uses ServletOAuth2AuthorizedClientExchangeFilterFunction to call protected APIs.
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