Shiro+Cas微服务化及前后端完全分离

本文实例为大家分享了Shiro Cas微服务化及前后端完全分离，供大家参考，具体内容如下

shiro+cas微服务化笔记

1.Spring Boot 配置

有如下两个配置文件：ShiroBaseConfig.java

import lombok.extern.log4j.Log4j;
import org.apache.shiro.cache.CacheManager;
import org.apache.shiro.cache.MemoryConstrainedCacheManager;
import org.apache.shiro.cas.CasFilter;
import org.apache.shiro.codec.Base64;
import org.apache.shiro.session.mgt.eis.MemorySessionDAO;
import org.apache.shiro.web.mgt.CookieRememberMeManager;
import org.apache.shiro.web.servlet.SimpleCookie;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

/**
 * <p>
 * Description: shiro权限管理模块conf
 *
 * @author Dean.Hwang
 * @date 17/5/18
 */
@Configuration
@Log4j
public class ShiroBaseConfiguration {
  @Value("${cas.server.url.prefix}")
  private String casPrefix;
  @Value("${cas.service}")
  private String casService;

  /**
   * 会话Cookie模板
   *
   * @return
   */
  @Bean
  public SimpleCookie sessionIdCookie() {
    SimpleCookie simpleCookie = new SimpleCookie("sid");
    simpleCookie.setHttpOnly(true);
    simpleCookie.setMaxAge(1800000);
    return simpleCookie;
  }

  /**
   * 会话Cookie模板
   *
   * @return
   */
  @Bean
  public SimpleCookie rememberCookie() {
    SimpleCookie simpleCookie = new SimpleCookie("rememberMe");
    simpleCookie.setHttpOnly(true);
    simpleCookie.setMaxAge(2592000);//30天
    return simpleCookie;
  }

  /**
   * rememberMe 管理器
   *
   * @return
   */
  @Bean
  public CookieRememberMeManager rememberMeManager(SimpleCookie rememberCookie) {
    CookieRememberMeManager cookieRememberMeManager = new CookieRememberMeManager();
    cookieRememberMeManager.setCipherKey(Base64.decode(""));// rememberMe cookie加密的密钥 建议每个项目都不一样 默认AES算法 密钥长度（128 256 512 位）
    cookieRememberMeManager.setCookie(rememberCookie);
    return cookieRememberMeManager;
  }

  /**
   * 会话DAO
   *
   * @return
   */
  @Bean
  public MemorySessionDAO sessionDAO() {
    return new MemorySessionDAO();
  }

  @Bean
  public CacheManager shiroCacheManager() {
    return new MemoryConstrainedCacheManager();
  }

  @Bean
  public KryCasRealm casRealm(CacheManager shiroCacheManager) {
    return new KryCasRealm(casPrefix, casService, shiroCacheManager);
  }

  @Bean
  public CasFilter casFilter() {
    CasFilter casFilter = new CasFilter();
    casFilter.setEnabled(true);
    casFilter.setName("casFilter");
    casFilter.setFailureUrl("/authority/casFailure");
    return casFilter;
  }

}

下面ShiroManagerConfiguration.java 文件

import org.apache.shiro.cache.CacheManager;
import org.apache.shiro.cas.CasFilter;
import org.apache.shiro.cas.CasSubjectFactory;
import org.apache.shiro.spring.web.ShiroFilterFactoryBean;
import org.apache.shiro.web.filter.authc.LogoutFilter;
import org.apache.shiro.web.mgt.CookieRememberMeManager;
import org.apache.shiro.web.mgt.DefaultWebSecurityManager;
import org.apache.shiro.web.session.mgt.ServletContainerSessionManager;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.beans.factory.config.MethodInvokingFactoryBean;
import org.springframework.boot.autoconfigure.AutoConfigureAfter;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

import javax.servlet.Filter;
import java.util.HashMap;
import java.util.Map;

/**
 * </p>
 * <p>
 * Copyright: Copyright (c) 2015
 * </p>
 * <p>
 * </p>
 *
 * @author Dean.Hwang
 * @date 17/5/18
 */
@Configuration
@AutoConfigureAfter(
    {ShiroBaseConfiguration.class}
)
public class ShiroManagerConfiguration {
  @Autowired
  private KryCasRealm kryCasRealm;
  @Autowired
  private CacheManager shiroCacheManager;
  @Autowired
  private CookieRememberMeManager rememberMeManager;
  @Value("${cas.server.login.url}")
  private String loginUrl;
  @Value("${cas.client.url.prefix}")
  private String urlPrefix;
  @Autowired
  private CasFilter casFilter;
  @Value("${cas.server.logout.url}")
  private String logoutUrl;
  @Value("${cas.client.index.url}")
  private String indexUrl;

  @Bean
  public DefaultWebSecurityManager securityManager() {
    DefaultWebSecurityManager securityManager = new DefaultWebSecurityManager();
    securityManager.setRealm(kryCasRealm);
    securityManager.setSessionManager(new ServletContainerSessionManager());
    securityManager.setCacheManager(shiroCacheManager);
    securityManager.setRememberMeManager(rememberMeManager);
    securityManager.setSubjectFactory(new CasSubjectFactory());
    return securityManager;
  }

  /**
   * 相当于调用SecurityUtils.setSecurityManager(securityManager)
   *
   * @param securityManager
   * @return
   */
  @Bean
  public MethodInvokingFactoryBean methodInvokingFactoryBean(DefaultWebSecurityManager securityManager) {
    MethodInvokingFactoryBean bean = new MethodInvokingFactoryBean();
    bean.setStaticMethod("org.apache.shiro.SecurityUtils.setSecurityManager");
    bean.setArguments(new Object[]{securityManager});
    return bean;
  }

  @Bean
  public ShiroFilterFactoryBean shiroFilter(DefaultWebSecurityManager securityManager) {
     ShiroFilterFactoryBean factoryBean = new ShiroFilterFactoryBean();
    factoryBean.setSecurityManager(securityManager);
    factoryBean.setLoginUrl(loginUrl + serviceStr + urlPrefix + "/cas");
    factoryBean.setSuccessUrl("../mind/index.do");
    factoryBean.setUnauthorizedUrl("/unauthorized.jsp");
    Map<String, Filter> filterMap = new HashMap<>();
    filterMap.put("cas", casFilter);
    filterMap.put("user", portalUserFilter);
    //只能在这里初始化LogoutFilter，不然会被spring boot注册到/*
    PortalLogoutFilter logoutFilter = new PortalLogoutFilter();
    logoutFilter.setRedirectUrl(logoutUrl + serviceStr + indexUrl);
    filterMap.put("logout", logoutFilter);
    factoryBean.setFilters(filterMap);
    Map<String, String> filters = new HashMap<>();
    filters.put("/casFailure.jsp", "anon");
    filters.put("/js/**", "anon");
    filters.put("/themes/**", "anon");
    filters.put("/3rdOauth/**", "anon");
    filters.put("/cas", "cas");
    filters.put("/logout", "logout");
    filters.put("/**", "user");
    factoryBean.setFilterChainDefinitionMap(filters);
    return factoryBean;  }
}  

2.UserFilter的改造

2.1改造的原因：

因为，我们现在新的服务器架构是前后端完全分离的。但是，shiro是不支持完全的前后端分离。所以导致了单点登录完成以后会跳转至接口，而不是目标页面。同时，由于历史原因，我们的cas验证服务器与业务服务器不是同一个域。如果，需要在服务器端进行重定向就必须要通过跨域，考虑到跨域会有风险。所以，我也将sso服务器登录重定向进行了重构。做成了返回json，前端在接收到json自己进行登录页跳转。

具体的实现代码如下:

protected void saveRequestAndRedirectToLogin(ServletRequest request, ServletResponse response) throws IOException {
    Session session = SecurityUtils.getSubject().getSession();
    if (session != null) {
      SavedRequest savedRequest = new PortalSavedRequest(WebUtils.toHttp(request));//重写的SavedRequest，具体处理由不同的业务需求自定
      session.setAttribute(SAVED_REQUEST_KEY, savedRequest);

    }
    PrintWriter out = null;
    try {
      ResultVO<Object> vo = ResultVO.isRedirect();
      RedirectInfo info = new RedirectInfo(loginRedirectUrl);
      vo.setData(info);
      response.setCharacterEncoding("UTF-8");
      response.setContentType("application/json; charset=utf-8");
      out = response.getWriter();
      out.write(JsonMapper.nonDefaultMapper().toJson(vo));
    } catch (IOException e) {
      log.error("登录重定向失败(Login Redirect Failed)", e);
    } finally {
      if (out != null) {
        out.close();
      }
    }
  }

此方法是将Cas中的Userfilter进行了重写，并且在配置时使用重写的类对原有的UserFilter进行了覆盖。

#3.登录成功后的重定向:

由于在sso验证服务器登录成功以后会重定向到本地业务服务器上。本地业务服务器验证登录成功以后会默认重定向至配置的SuccessUrl。这样并不能将页面跳转回用户的原来请求的页面。所以我重写了CasFilter中的issueSuccessRedirect达到这个目的

/**
 * <p>
 * Copyright: Copyright (c) 2015
 * </p>
 *
 * @author Dean.Hwang
 * @date 17/7/17
 */
public class PortalCasFilter extends CasFilter {

  @Override
  protected void issueSuccessRedirect(ServletRequest request, ServletResponse response) throws Exception {
    String successUrl = ((ShiroHttpServletRequest) request).getHeader("page-url");//前端页面在请求的时候在header中带上请求这个接口的url。这样便将登录成功后需要跳转的地址绑定到了对应的Subject对象中。以便于在登录以后跳转到这个页面
    if (StringUtil.isBlank(successUrl)) {
      WebUtils.redirectToSavedRequest(request, response, getSuccessUrl());
    } else {
      WebUtils.redirectToSavedRequest(request, response, successUrl);
    }
  }
}

#4.用户安全的退出

后期发现直接依靠原有的logout会发生session未注销的情况。所以重写了LogoutFilter。登出的时候直接调用配置的URL即可

/**

 * </p>
 * <p>
 * Copyright: Copyright (c) 2015
 * </p>
 *
 * @author Dean.Hwang
 * @date 17/7/17
 */
public class PortalLogoutFilter extends AdviceFilter {

  private static final Logger log = LoggerFactory.getLogger(LogoutFilter.class);

  public static final String DEFAULT_REDIRECT_URL = "/";

  private String redirectUrl = DEFAULT_REDIRECT_URL;

  @Override
  protected boolean preHandle(ServletRequest request, ServletResponse response) throws Exception {
    Subject subject = getSubject(request, response);
    String redirectUrl = getRedirectUrl(request, response, subject);
    //try/catch added for SHIRO-298:
    try {
      subject.logout();
      Session session = subject.getSession();
      session.stop();
    } catch (SessionException ise) {
      log.debug("Encountered session exception during logout. This can generally safely be ignored.", ise);
    }
    issueRedirect(request, response, redirectUrl);
    return false;
  }
}

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持我们。