Grails 3 Spring Security Demo

Environment Setup

Set your Grails environment to use Grails 3. Currently, this demo is built using Grails 3.0.6.
Clone or fork the project

Initial Steps

These initial steps are already done for the code that is on GitHub. I just wanted to note what was done to get the code to this starting point.

Opened Grails command line and run create-app grails3-spring-security-demo --profile=web
Updated grails-app/conf/logback.groovy and added the following:

    // added so that we get more of the Spring Boot startup
    logger('org.springframework', INFO)

Opened Grails command line and run create-controller grails3.spring.security.demo.Admin to create a controller that we can test against. I also changed the index() method of the AdminController to render something to the response
I added the following entry to the build.gradle dependencies section:

    compile "org.springframework.boot:spring-boot-starter-security"

Added @ComponentScan to grails-app/init/grails3/spring/security/demo/Application.groovy

Demos

So, if you run the application as-is from GitHub, you will have an application with a single controller. All URLs to the application are protected via a randomly generated password that you can find printed to the console during application startup. The default username is "user". To run the application, just go to grails-app/init/grails3/spring/security/demo/Application.groovy and run the class. Or, you can use gradle and execute gradle run

Remember between runs of the demos to clear your HTTP basic credentials. Most browsers support the ctrl+shift+del shortcut to bring up the dialog to clear browser history/settings/credentials.

In-memory authentication example

To enable the in-memory security configuration, go to grails-app/init/grails3/spring/security/demo/InMemorySecurityConfig.groovy and uncomment the @Configuration annotation. At that point, you should be able to authenticate with the username/password listed in that source. You should be able to access the application root page without needing to provide credentials, but if you navigate to /admin, you should be challenged to authenticate.

Basic provider authentication example

To enable the provider security configuration, first we need to comment the @Configuration in the in-memory authentication example. Then, go to grails-app/init/grails3/spring/security/demo/ProviderSecurityConfig.groovy and uncomment the @Configuration annotation. Then we also need to go to src/main/groovy/grails3/spring/security/demo/SimpleAuthenticationProvider.groovy and uncomment the @Component annotation. At that point, you should be able to authenticate with the username/password listed in that source. You should be able to access the application root page without needing to provide credentials, but if you navigate to /admin, you should be challenged to authenticate.

URL Intercept with provider example

To enable the URL intercept security configuration, first we need to comment the @Configuration and @Component annotations that we enabled in the provider authentication example. You'll also need to comment the @EnableWebSecurity annotations in the InMemorySecurityConfig.groovy and ProviderSecurityConfig.groovy. Then, go to grails-app/init/grails3/spring/security/demo/InterceptMapSecurityConfig.groovy and uncomment the @Configuration annotation. Then we also need to go to grails-app/conf/spring/resources.groovy and uncomment the authenticationProvider bean definition. At that point, you should be able to authenticate with the username/password listed in that source. You should be able to access the application root page without needing to provide credentials, but if you navigate to /admin, you should be challenged to authenticate.