SpringSecurity实现统一登录

ゞ浴缸里的玫瑰 2022-09-09 12:49 137阅读 0赞

场景：A服务器的平台需要跳转B服务器的平台，中间通过一个链接把A平台的身份信息带入，直接进入B平台做校验，实现到B平台的免登陆流程。

实现思路：对跳转的url路径做Filter过滤，Filter里写具体实现逻辑。总结一下用SRT实现的流程。

需要实现的三个核心类

SecurityConfigurerAdapter //定义的配置信息

AuthenticationProvider  //核心处理器  
AbstractAuthenticationProcessingFilter //核心过滤器

上代码，定义一个配置类。把过滤的一系列操作定义好。

@Component("MerchantAuthenticationSecurityConfig")
    @EnableWebSecurity //配置注解
    public class MerchantAuthenticationSecurityConfig extends SecurityConfigurerAdapter<DefaultSecurityFilterChain, HttpSecurity> {
    
        private Logger logger = LoggerFactory.getLogger(getClass());
    
        @Override
        public void configure(HttpSecurity http) {
            //将自定义的登录配置放入链中
            MerchantAuthenticationProvider merchantAuthenticationProver = new MerchantAuthenticationProvider(userDetailsService,sysUserService); //构造Provider'
    
            MerchantAuthenticationFilter merchantAuthenticationFilter = new MerchantAuthenticationFilter("/rdp/boss/asc",confPath);//构造方法将请求链接放入
            merchantAuthenticationFilter.setAuthenticationManager(http.getSharedObject(AuthenticationManager.class));//设置鉴权处理器
            merchantAuthenticationFilter.setAuthenticationSuccessHandler(loginResultHandler);//设置处理成功的Handle
            merchantAuthenticationFilter.setAuthenticationFailureHandler(loginResultHandler);//设置处理失败的Handle
            merchantAuthenticationFilter.setRememberMeServices(tokenBasedRememberMeServices);
    //设置会话记录服务
    
            //统一用户平台登录，核心设置
            http.authenticationProvider(merchantAuthenticationProver)
                    .addFilterAfter(merchantAuthenticationFilter, UsernamePasswordAuthenticationFilter.class);
    
        }
    
    }

然后一个核心处理类

public class MerchantAuthenticationProvider implements AuthenticationProvider {
    
        private UserDetailsService userDetailsService;
    
        private SysUserService sysUserService;
    
        public MerchantAuthenticationProvider(UserDetailsService userDetailsService, SysUserService sysUserService){
            this.userDetailsService = userDetailsService;
            this.sysUserService = sysUserService;
        }
    
       //该方法在dofilter后调用
        @Override
        public Authentication authenticate(Authentication authentication) throws AuthenticationException {
            //TODO此处写验证逻辑
            return new Authentication（）;
        }
    
        @Override
        public boolean supports(Class<?> authentication) {
            // 判断 authentication 是不是 OperatorAuthenticationToken 的子类或子接口
            return UsernamePasswordAuthenticationToken.class.isAssignableFrom(authentication);
        }
    }

核心过滤器

public class MerchantAuthenticationFilter extends AbstractAuthenticationProcessingFilter {
    
        private static final Logger logger = LoggerFactory.getLogger(MerchantAuthenticationFilter.class);
    
        
    
        public MerchantAuthenticationFilter(String loginPath,String confPath) {
            super(new AntPathRequestMatcher(loginPath, REQUEST_METHOD));
            this.confPath = confPath;
        }
    
        @Override
        public Authentication attemptAuthentication(HttpServletRequest request, HttpServletResponse response) throws AuthenticationException {
            //TODO此处写具体业务逻辑
    
            return new Authentication();
        }
    
    }

整体代码的加载流程，项目启动时先加载配置类将配置信息加载。 然后开始统一登录认证，会优先对所配置的路径进行拦截进入Filter中的doFilter方法。此处我没重写AbstractAuthenticationProcessingFilter 的doFilter方法，所以会复用父类方法。在父类方法中会调用到attemptAuthentication方法，此处就是我子类的具体实现。看下源码图。

![watermark_type_ZHJvaWRzYW5zZmFsbGJhY2s_shadow_50_text_Q1NETiBAMTg155qE6Zi_5bmz_size_20_color_FFFFFF_t_70_g_se_x_16][]

该方法会返回一个Authentication 对象，这个对象恰好是用在AuthenticationProvider类的authenticate方法中入参。所以doFilter走完后它会根据配置的Provider去找authenticate方法执行。在业务代码中就是记录会话的操作。由此来实现统一登录。

参考资料 [https://www.jianshu.com/p/97ce9b071505][https_www.jianshu.com_p_97ce9b071505]

[watermark_type_ZHJvaWRzYW5zZmFsbGJhY2s_shadow_50_text_Q1NETiBAMTg155qE6Zi_5bmz_size_20_color_FFFFFF_t_70_g_se_x_16]: /images/20220829/29a9d515308d48ecb44cbe18abe807de.png
[https_www.jianshu.com_p_97ce9b071505]: https://www.jianshu.com/p/97ce9b071505