springboot session + redis整合 SSO初版

2023年7月9日 207次阅读来源: xiaoyiyiyo

背景资料：

sso:

单点登录原理与简单实现
推荐，要了解基础原理的得看看。提供了思路，代码细节待琢磨，使用的是springmvc

spring session:

请不要使用2.0.2.RELEASE版本，后面会有说明。
spring-boot+spring-session集成
 通过Spring Session实现新一代的Session管理
 Spring Session Strategy 详解

redis:

springboot2.x redis缓存配置

补充说明：

对上面提供的sso博客原理补充(13/05/2018补充：cas单点登录)：

何为局部会话，全局会话，为什么访问第二个系统时认证中心能够知道用户已登录?
局部会话：
浏览器访问系统A或B时两者间建立的一个会话，具体表现为系统A或B会为第一次访问建立一个session对象，之后访问不会再建立(session还存活时)
全局会话：
这个在博客中没有说清楚，其实这个指的是浏览器与认证中心之间建立的一个会话！
当访问第二个系统B时，系统B发现用户没登录，重定向到认证中心，注意此时会话切换到了全局会话！认证中心通过该会话可以发现用户已经登陆(之前访问系统A时到认证中心登录了)

对spring session补充：

如果用spring boot整合spring session来实现sso, 不要使用spring boot 2.0.1版本(允悲, 排查了好久)。
因为spring boot 2.0.1 顺带用了spring session 2.0.2.RELEASE，但是2.0.2版本的spring session文档中说了下面一句英文：
貌似是说该版本不支持单个浏览器实例维持多个用户会话(原理不太懂的话参照上面提供的链接)
11.4. Dropped Support
As a part of the changes to HttpSessionStrategy and it’s alignment to the counterpart from the reactive world, the support for managing multiple users’ sessions in a single browser instance has been removed. This introduction of new API to replace this functionality in consideration for future releases.

故使用1.5.12版本的spring boot。

代码 github地址： https://github.com/xiaoyiyiyo/springboot_sso

===================华丽的分割线=======================

主要代码(比较粗糙，后续可能改动)：

sso server 认证中心端：

提供一个Filter类，主要过滤处理各个系统的重定向。

@WebFilter(filterName = "sessionFilter", urlPatterns = {"/login", "/logout"})
public class SessionFilter implements Filter{

    @Autowired
    private RedisTemplate redisTemplate;

    @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;
        HttpServletResponse response = (HttpServletResponse)servletResponse;
        HttpSession session  = request.getSession();

        String uri = request.getRequestURI();

        //注销请求，放行
        if ("/logout".equals(uri)) {
            filterChain.doFilter(servletRequest, servletResponse);
            return;
        }

        //已经登录，然后根据其他参数进行下一步判断
        if (session.getAttribute(AuthConst.IS_LOGIN) != null) {
            String clientUrl = request.getParameter(AuthConst.CLIENT_URL);
            String token = (String) session.getAttribute(AuthConst.TOKEN);
            if (clientUrl != null && !"".equals(clientUrl)) {
                redisTemplate.opsForSet().add(token, clientUrl);
                if (clientUrl.contains("?")) {
                    clientUrl = clientUrl + "&";
                } else {
                    clientUrl = clientUrl + "?";
                }
                response.sendRedirect(clientUrl + AuthConst.TOKEN + "=" + token);
                return;
            }
            filterChain.doFilter(servletRequest, servletResponse);
            return;
        }

        //登录请求，放行
        if ("/".equals(uri) || "/login".equals(uri)) {
            filterChain.doFilter(servletRequest, servletResponse);
            return;
        }

        //其他请求
        response.sendRedirect("/");
    }

    @Override
    public void destroy() {

    }
}

提供controller类，处理登录/注销请求：

@Controller
public class UserController {

    @Autowired
    private IUserService userService;

    @Autowired
    private RedisTemplate redisTemplate;

    @PostMapping("/login")
    public void login(HttpServletRequest request, HttpServletResponse response,
                        @RequestParam Map<String, String> map) throws IOException {

        String userName = map.get("username");
        String password = map.get("password");
        String clientUrl = map.get("clientUrl");

        UserDo user = userService.getUser(userName, password);

        if (user == null) {
            response.sendRedirect("/");
            return;
        }

        //设置全局session，并缓存
        HttpSession session = request.getSession();
        String token = UUID.randomUUID().toString();
        session.setAttribute(AuthConst.IS_LOGIN, true);
        session.setAttribute(AuthConst.TOKEN, token);

        //根据token, 缓存用户
        redisTemplate.opsForValue().set("user:" + token, user);

        if (!StringUtils.isEmpty(clientUrl)) {

            // 缓存各个系统的地址
            redisTemplate.opsForSet().add(AuthConst.CLIENT_URL + ":"+ token, clientUrl);

            if (clientUrl.contains("?")) {
                clientUrl = clientUrl + "&";
            } else {
                clientUrl = clientUrl + "?";
            }
            response.sendRedirect(clientUrl + AuthConst.TOKEN + "=" + token);
            return;
        }
        response.sendRedirect("/");
        return;
    }

    @GetMapping("/logout")
    public void logout(HttpServletRequest request, HttpServletResponse response) throws IOException {
        HttpSession session = request.getSession();
        String token = request.getParameter(AuthConst.TOKEN);
        String clientUrl = request.getParameter(AuthConst.CLIENT_URL);

        // 当request参数中token为空，可从session中获取
        if (StringUtils.isEmpty(token)) {
            token = (String)session.getAttribute(AuthConst.TOKEN);
        }

        //销毁session
        if (session != null) {
            session.invalidate();
        }

        //通知各个系统注销
        Set<String> set = redisTemplate.opsForSet().members(AuthConst.CLIENT_URL + ":" + token);
        if (null != set && set.size() > 0) {
            Map<String, String> paramMap = new HashMap<String, String>();
            paramMap.put(AuthConst.LOGOUT_REUQEST, token);
            for (String url: set) {
                HttpUtils.doPost(url, paramMap);
            }
        }

        if (StringUtils.isEmpty(clientUrl)) {
            response.sendRedirect("/");
        }
        response.sendRedirect(clientUrl);
    }
}

关键配置：
配置实例化CookieHttpSessionStrategy

@Configuration
public class RedisSessionConfig {

    @Bean
    public CookieHttpSessionStrategy cookieHttpSessionStrategy() {
        CookieHttpSessionStrategy strategy=new CookieHttpSessionStrategy();
        DefaultCookieSerializer cookieSerializer=new DefaultCookieSerializer();
        cookieSerializer.setCookieName("SSO_SESSION");//cookies名称
        cookieSerializer.setCookieMaxAge(1800);//过期时间(秒)
        strategy.setCookieSerializer(cookieSerializer);
        return strategy;
    }
}

配置application.yml

spring:
  session:
    store-type: redis #表示启用redis管理session，关键配置
    redis:
      namespace: sso_server
  cache:
    type: redis
  redis:
    host: 127.0.0.1
    port: 6379
    timeout: 0
    database: 1
    pool:
      max-active: 8
      max-wait: -1
      max-idle: 8
      min-idle: 0
  #jpa 配置
  jpa:
    hibernate:
      #命名策略(遇到大写字母，加"_"命名)
      naming:
        physical-strategy: org.springframework.boot.orm.jpa.hibernate.SpringPhysicalNamingStrategy
      ddl-auto: update
    show-sql: true
    database: mysql
  datasource:
    url: jdbc:mysql://localhost:3306/sso?useUnicode=true&characterEncoding=UTF8
    username: root
    password: xxxx
    driver-class-name: com.mysql.jdbc.Driver

sso client 各个系统端：

提供LoginFilter，过滤处理浏览器的访问之前是否已登录

@WebFilter(filterName = "loginFilter", urlPatterns = "/*")
public class LoginFilter implements Filter{

    @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;
        HttpServletResponse response = (HttpServletResponse)servletResponse;
        HttpSession session = request.getSession();

        if ("/index".equals(request.getRequestURI())) {
            filterChain.doFilter(servletRequest, servletResponse);
            return;
        }

        //第一次访问，用户没登录
        //用户拿到token，再次访问，此时is_login依旧为false
        Object is_login = session.getAttribute(AuthConst.IS_LOGIN);
        if (is_login != null && (Boolean) session.getAttribute(AuthConst.IS_LOGIN)) {
            filterChain.doFilter(servletRequest, servletResponse);
            return;
        }

        //第一次访问，token为null
        //用户拿到token，说明已通过验证，将session标记为已登录
        String token = request.getParameter(AuthConst.TOKEN);
        if (token != null) {
            session.setAttribute(AuthConst.TOKEN, token);
            session.setAttribute(AuthConst.IS_LOGIN, true);
            filterChain.doFilter(servletRequest, servletResponse);
            return;
        }

        //没有登录将用户请求重定向到认证中心
        response.sendRedirect("http://localhost:8080/login" + "?" + AuthConst.CLIENT_URL + "=" + request.getRequestURL());
    }

    @Override
    public void destroy() {

    }
}

提供LogoutFilter，过滤处理注销请求

/**
 * Created by xiaoyiyiyo on 2018/5/6.
 */
@WebFilter(filterName = "logoutFilter", urlPatterns = "/*")
public class LogoutFilter implements Filter{

    @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;
        HttpServletResponse response = (HttpServletResponse)servletResponse;
        HttpSession session = request.getSession();

        // 用户发出logout请求，重定向到认证中心处理
        if ("/logout".equals(request.getRequestURI())) {
            String token = (String)session.getAttribute(AuthConst.TOKEN);
            //附带系统首页
            response.sendRedirect("http://localhost:8080/logout" + "?" + AuthConst.TOKEN + "=" + token
                + "&" + AuthConst.CLIENT_URL + "=http://localhost:8081/index");
            return;
        }

        // 得到来自认证中心发过来的注销通知
        String token = request.getParameter(AuthConst.LOGOUT_REUQEST);
        if (!StringUtils.isEmpty(token) && session != null) {
            session.invalidate();
        }

        filterChain.doFilter(servletRequest, servletResponse);
    }

    @Override
    public void destroy() {

    }
}

主要配置参看sso server。

待续….

github地址： https://github.com/xiaoyiyiyo/springboot_sso

    原文作者：xiaoyiyiyo
    原文地址: https://www.jianshu.com/p/6aa10b295bf8
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