SpringBoot2.7以上版本整合SpringSecurity新款优雅实现方式

2022-06-05 2143点热度 0人点赞 0条评论

前不久Spring Boot 2.7.0 刚刚发布,Spring Security 也升级到了5.7.1 。升级后发现,原来一直在用的Spring Security配置方法,居然已经被弃用了。不禁感慨技术更新真快,用着用着就被弃用了!今天带大家体验下Spring Security的最新用法,看看是不是够优雅!

基本使用

在Spring Boot 2.7.0 之前的版本中,我们需要写个配置类继承WebSecurityConfigurerAdapter ,然后重写Adapter中的三个方法进行配置;

/**
 * SpringSecurity的配置
 */
@Configuration
@EnableWebSecurity
@EnableGlobalMethodSecurity(prePostEnabled = true)
public class OldSecurityConfig extends WebSecurityConfigurerAdapter {
    @Autowired
    private UmsAdminService adminService;

    @Override
    protected void configure(HttpSecurity httpSecurity) throws Exception {
        //省略HttpSecurity的配置
    }

    @Override
    protected void configure(AuthenticationManagerBuilder auth) throws Exception {
        auth.userDetailsService(userDetailsService())
                .passwordEncoder(passwordEncoder());
    }
    
    @Bean
    @Override
    public AuthenticationManager authenticationManagerBean() throws Exception {
        return super.authenticationManagerBean();
    }

}

如果你在SpringBoot 2.7.0版本中进行使用的话,你就会发现WebSecurityConfigurerAdapter 已经被弃用了,看样子Spring Security要坚决放弃这种用法了!

新用法非常简单,无需再继承WebSecurityConfigurerAdapter ,只需直接声明配置类,再配置一个生成 SecurityFilterChain Bean的方法,把原来的HttpSecurity配置移动到该方法中即可。

/**
 * SpringSecurity 5.4.x以上新用法配置
 * 为避免循环依赖,仅用于配置HttpSecurity
 */
@Configuration
public class SecurityConfig {

    @Bean
    SecurityFilterChain filterChain(HttpSecurity httpSecurity) throws Exception {
        //省略HttpSecurity的配置
        return httpSecurity.build();
    }

}

新用法感觉非常简洁干脆,避免了继承WebSecurityConfigurerAdapter 并重写方法的操作,强烈建议大家更新一波!

高级使用

Spring Boot 2.7.0版本后,Spring Security对于配置方法有了大的更改,那么其他使用有没有影响呢?其实是没啥影响的,这里再聊聊如何使用Spring Security实现动态权限控制!

基于方法的动态权限

基于方法的动态权限控制,这种方式虽然实现简单,但却有一定的弊端。

  • 在配置类上使用 @EnableGlobalMethodSecurity 来开启它;
/**
 * SpringSecurity的配置
 */
@Configuration
@EnableWebSecurity
@EnableGlobalMethodSecurity(prePostEnabled = true)
public class OldSecurityConfig extends WebSecurityConfigurerAdapter {
    
}
  • 然后在方法中使用 @PreAuthorize 配置访问接口需要的权限;
/**
 * Controller
 */
@Controller
@RequestMapping("/test")
public class TestController {

    @RequestMapping(value = "/test", method = RequestMethod.GET)
    @ResponseBody
    @PreAuthorize("hasAuthority('some:function:create')")
    public R test() {
        return R.success(count);
    }
}
  • 再从数据库中查询出用户所拥有的权限值设置到 UserDetails 对象中去,这种做法虽然实现方便,但是把权限值写死在了方法上,并不是一种优雅的做法。
/**
 * UserService实现类
 */
@Service
public class UserServiceImpl implements IUserService {
    @Override
    public UserDetails loadUserByUsername(String username){
        //获取用户信息
        UmsAdmin admin = getAdminByUsername(username);
        if (admin != null) {
            List<UmsPermission> permissionList = getPermissionList(admin.getId());
            return new AdminUserDetails(admin, permissionList);
        }
        throw new UsernameNotFoundException("用户名或密码错误");
    }
}
  • 基于路径的动态权限

其实每个接口对应的路径都是唯一的,通过路径来进行接口的权限控制才是更优雅的方式。

  • doFilter OPTIONS 白名单 super.beforeInvocation(fi) AccessDecisionManager decide
/**
 * 动态权限过滤器,用于实现基于路径的动态权限过滤
 */
public class DynamicSecurityFilter extends AbstractSecurityInterceptor implements Filter {

    @Autowired
    private DynamicSecurityMetadataSource dynamicSecurityMetadataSource;
    @Autowired
    private IgnoreUrlsConfig ignoreUrlsConfig;

    @Autowired
    public void setMyAccessDecisionManager(DynamicAccessDecisionManager dynamicAccessDecisionManager) {
        super.setAccessDecisionManager(dynamicAccessDecisionManager);
    }

    @Override
    public void init(FilterConfig filterConfig) throws ServletException {
    }

    @Override
    public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {
        HttpServletRequest request = (HttpServletRequest) servletRequest;
        FilterInvocation fi = new FilterInvocation(servletRequest, servletResponse, filterChain);
        //OPTIONS请求直接放行
        if(request.getMethod().equals(HttpMethod.OPTIONS.toString())){
            fi.getChain().doFilter(fi.getRequest(), fi.getResponse());
            return;
        }
        //白名单请求直接放行
        PathMatcher pathMatcher = new AntPathMatcher();
        for (String path : ignoreUrlsConfig.getUrls()) {
            if(pathMatcher.match(path,request.getRequestURI())){
                fi.getChain().doFilter(fi.getRequest(), fi.getResponse());
                return;
            }
        }
        //此处会调用AccessDecisionManager中的decide方法进行鉴权操作
        InterceptorStatusToken token = super.beforeInvocation(fi);
        try {
            fi.getChain().doFilter(fi.getRequest(), fi.getResponse());
        } finally {
            super.afterInvocation(token, null);
        }
    }

    @Override
    public void destroy() {
    }

    @Override
    public Class<?> getSecureObjectClass() {
        return FilterInvocation.class;
    }

    @Override
    public SecurityMetadataSource obtainSecurityMetadataSource() {
        return dynamicSecurityMetadataSource;
    }

}
  • 接下来我们就需要创建一个类来继承 AccessDecisionManager ,通过 decide 方法对访问接口所需权限和用户拥有的权限进行匹配,匹配则放行;
/**
 * 动态权限决策管理器,用于判断用户是否有访问权限
 */
public class DynamicAccessDecisionManager implements AccessDecisionManager {

    @Override
    public void decide(Authentication authentication, Object object,
                       Collection<ConfigAttribute> configAttributes) throws AccessDeniedException, InsufficientAuthenticationException {
        // 当接口未被配置资源时直接放行
        if (CollUtil.isEmpty(configAttributes)) {
            return;
        }
        Iterator<ConfigAttribute> iterator = configAttributes.iterator();
        while (iterator.hasNext()) {
            ConfigAttribute configAttribute = iterator.next();
            //将访问所需资源或用户拥有资源进行比对
            String needAuthority = configAttribute.getAttribute();
            for (GrantedAuthority grantedAuthority : authentication.getAuthorities()) {
                if (needAuthority.trim().equals(grantedAuthority.getAuthority())) {
                    return;
                }
            }
        }
        throw new AccessDeniedException("抱歉,您没有访问权限");
    }

    @Override
    public boolean supports(ConfigAttribute configAttribute) {
        return true;
    }

    @Override
    public boolean supports(Class<?> aClass) {
        return true;
    }

}
  • decide configAttributes FilterInvocationSecurityMetadataSource getAttributes getAttributes
/**
 * 动态权限数据源,用于获取动态权限规则
 */
public class DynamicSecurityMetadataSource implements FilterInvocationSecurityMetadataSource {

    private static Map<String, ConfigAttribute> configAttributeMap = null;
    @Autowired
    private DynamicSecurityService dynamicSecurityService;

    @PostConstruct
    public void loadDataSource() {
        configAttributeMap = dynamicSecurityService.loadDataSource();
    }

    public void clearDataSource() {
        configAttributeMap.clear();
        configAttributeMap = null;
    }

    @Override
    public Collection<ConfigAttribute> getAttributes(Object o) throws IllegalArgumentException {
        if (configAttributeMap == null) this.loadDataSource();
        List<ConfigAttribute>  configAttributes = new ArrayList<>();
        //获取当前访问的路径
        String url = ((FilterInvocation) o).getRequestUrl();
        String path = URLUtil.getPath(url);
        PathMatcher pathMatcher = new AntPathMatcher();
        Iterator<String> iterator = configAttributeMap.keySet().iterator();
        //获取访问该路径所需资源
        while (iterator.hasNext()) {
            String pattern = iterator.next();
            if (pathMatcher.match(pattern, path)) {
                configAttributes.add(configAttributeMap.get(pattern));
            }
        }
        // 未设置操作请求权限,返回空集合
        return configAttributes;
    }

    @Override
    public Collection<ConfigAttribute> getAllConfigAttributes() {
        return null;
    }

    @Override
    public boolean supports(Class<?> aClass) {
        return true;
    }

}
  • 这里需要注意的是,所有路径对应的权限值数据来自于自定义的 DynamicSecurityService ;
/**
 * 动态权限相关业务类
 */
public interface DynamicSecurityService {
    /**
     * 加载资源ANT通配符和资源对应MAP
     */
    Map<String, ConfigAttribute> loadDataSource();
}
  • 一切准备就绪,把动态权限过滤器添加到 FilterSecurityInterceptor 之前;
/**
 * SpringSecurity 5.4.x以上新用法配置
 * 为避免循环依赖,仅用于配置HttpSecurity
 */
@Configuration
public class SecurityConfig {
    
    @Autowired
    private DynamicSecurityService dynamicSecurityService;

    @Autowired
    private DynamicSecurityFilter dynamicSecurityFilter;

    @Bean
    SecurityFilterChain filterChain(HttpSecurity httpSecurity) throws Exception {
        //省略若干配置...
        //有动态权限配置时添加动态权限校验过滤器
        if(dynamicSecurityService!=null){
            registry.and().addFilterBefore(dynamicSecurityFilter, FilterSecurityInterceptor.class);
        }
        return httpSecurity.build();
    }

}
  • 如果你看过这篇 仅需四步,整合SpringSecurity+JWT实现登录认证 ! 的话,就知道应该要配置这两个Bean了,一个负责获取登录用户信息,另一个负责获取存储的动态权限规则,为了适应Spring Security的新用法,我们不再继承 SecurityConfig ,简洁了不少!
/**
 * mall-security模块相关配置
 * 自定义配置,用于配置如何获取用户信息及动态权限
 */
@Configuration
public class MallSecurityConfig {

    @Autowired
    private UmsAdminService adminService;

    @Bean
    public UserDetailsService userDetailsService() {
        //获取登录用户信息
        return username -> {
            AdminUserDetails admin = adminService.getAdminByUsername(username);
            if (admin != null) {
                return admin;
            }
            throw new UsernameNotFoundException("用户名或密码错误");
        };
    }

    @Bean
    public DynamicSecurityService dynamicSecurityService() {
        return new DynamicSecurityService() {
            @Override
            public Map<String, ConfigAttribute> loadDataSource() {
                Map<String, ConfigAttribute> map = new ConcurrentHashMap<>();
                List<UmsResource> resourceList = adminService.getResourceList();
                for (UmsResource resource : resourceList) {
                    map.put(resource.getUrl(), new org.springframework.security.access.SecurityConfig(resource.getId() + ":" + resource.getName()));
                }
                return map;
            }
        };
    }

}

 

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