WebSecurityConfigurerAdapter 구현

main application 과 같은 package 에 다음과 같이 WebSecurityConfigurerAdapter 를 상속한 클래스를 선언한다.

package com.example.demo;

import com.example.demo.repository.ReaderRepository;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Configuration;
import org.springframework.security.config.annotation.authentication.builders.AuthenticationManagerBuilder;
import org.springframework.security.config.annotation.web.builders.HttpSecurity;
import org.springframework.security.config.annotation.web.configuration.EnableWebSecurity;
import org.springframework.security.config.annotation.web.configuration.WebSecurityConfigurerAdapter;
//import org.springframework.security.core.userdetails.UserDetails;
//import org.springframework.security.core.userdetails.UserDetailsService;
//import org.springframework.security.core.userdetails.UsernameNotFoundException;

@Configuration
@EnableWebSecurity
public class SecurityConfig extends WebSecurityConfigurerAdapter {

    @Autowired
    // 물론 JpaRepository<Reader, String> 을 구현한 readerRepository 인터페이스를 미리 구현했다.
    private ReaderRepository readerRepository;

    @Override
    protected void configure(HttpSecurity http) throws Exception {
        http.authorizeRequests()
                .antMatchers("/").access("hasRole('READER')")
                .antMatchers("/**").permitAll()
                .and()
                .formLogin()
                .loginPage("/login")
                .failureUrl("/login?error=true"); // ${param.error} 인 경우는 thymeleaf 에서 알아서 한다. 
    }

    @Override
    protected void configure(AuthenticationManagerBuilder auth) throws Exception {
        auth.userDetailsService(userDetailsService());
    }

    @Bean
    public UserDetailsService userDetailsService() {
        return userRepository::findOne; // Reader Entity 의 id 가 String 이기 때문에 가능하다.
    }


}