SecurityConfig.java

/**
 * Copyright 2014 the original author or authors.
 * 
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except
 * in compliance with the License. You may obtain a copy of the License at
 * 
 * http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software distributed under the License
 * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
 * or implied. See the License for the specific language governing permissions and limitations under
 * the License.
 */
package com.javaetmoi.sample.config;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.Scope;
import org.springframework.context.annotation.ScopedProxyMode;

import org.springframework.security.authentication.RememberMeAuthenticationToken;
import org.springframework.security.authentication.UsernamePasswordAuthenticationToken;
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.builders.WebSecurity;
import org.springframework.security.config.annotation.web.configuration.WebSecurityConfigurerAdapter;
import org.springframework.security.config.annotation.web.servlet.configuration.EnableWebMvcSecurity;
import org.springframework.security.core.Authentication;
import org.springframework.security.core.context.SecurityContextHolder;
import org.springframework.security.core.userdetails.UserDetails;
 

@Configuration
@EnableWebMvcSecurity
public class SecurityConfig extends WebSecurityConfigurerAdapter {


    @Autowired
    public void configureGlobal(AuthenticationManagerBuilder auth) throws Exception {
        // to customize with your own authentication provider
        auth
      .inMemoryAuthentication()
        .withUser("user").password("password").roles("USER");
    }

    @Override
    public void configure(WebSecurity web) throws Exception {
        web
            .ignoring()
                .antMatchers("/resources/**");
    }

    @Override
    protected void configure(HttpSecurity http) throws Exception {
        http
          .authorizeRequests()
            .antMatchers("/signup","/about").permitAll()
            .antMatchers("/admin/**").hasRole("ADMIN")
            .anyRequest().authenticated() // 7
            .and()
          .formLogin()
             .loginPage("/login") 
             .permitAll();
    }
    

    /**
     * Authenticated user information available as a proxified Spring bean.
     * 
     * <p>Could be inject into beans of scope singleton (ie. @Service or @Controler)      
     */
    @Bean
    @Scope(value = "session", proxyMode = ScopedProxyMode.TARGET_CLASS)
    public UserDetails authenticatedUserDetails() {
        SecurityContextHolder.getContext().getAuthentication();
        Authentication authentication = SecurityContextHolder.getContext().getAuthentication();
        if (authentication != null) {
            if (authentication instanceof UsernamePasswordAuthenticationToken) {
                return (UserDetails) ((UsernamePasswordAuthenticationToken) authentication).getPrincipal();
            }
            if (authentication instanceof RememberMeAuthenticationToken) {
                return (UserDetails) ((RememberMeAuthenticationToken) authentication).getPrincipal();
            }
        }
       return null;
    }
}