前言
这次在处理一个小项目时用到了前后端分离，服务端使用springboot2.x。权限验证使用了Shiro。前后端分离首先需要解决的是跨域问题，POST接口跨域时会预发送一个OPTIONS请求，浏览器收到响应后会继续执行POST请求。 前后端分离后为了保持会话状态使用session持久化插件shiro-redis，持久化session可以持久化到关系型数据库，也可以持久化到非关系型数据库（主要是重写SessionDao）。Shiro已提供了SessionDao接口和抽象类。如果项目中用到Swagger的话，还需要把swagger相关url放行。
搭建依赖
org.crazycake shiro-redis 3.2.3 org.apache.shiro shiro-spring 1.4.1
Shiro权限配置
1、ShiroConfig。这里主要是shiro核心配置。比如SecurityManager、SessionManager、CacheManager。
public class ShiroConfig {
@Value("${spring.redis.shiro.host}")
private String host;
@Value("${spring.redis.shiro.port}")
private int port;
@Value("${spring.redis.shiro.timeout}")
private int timeout;
@Value("${spring.redis.shiro.password}")
private String password;
/**
* 权限规则配置
**/
@Bean
public ShiroFilterFactoryBean shiroFilterFactoryBean(SecurityManager securityManager) {
ShiroFilterFactoryBean shiroFilterFactoryBean = new ShiroFilterFactoryBean();
shiroFilterFactoryBean.setSecurityManager(securityManager);
Map filters = shiroFilterFactoryBean.getFilters();
filters.put("authc", new MyFormAuthorizationFilter());
Map filterChainDefinitionMap = new LinkedHashMap<>();
//swagger资源不拦截
filterChainDefinitionMap.put("/swagger-ui.html", "anon");
filterChainDefinitionMap.put("/swagger-resources/**/**", "anon");
filterChainDefinitionMap.put("/v2/api-docs", "anon");
filterChainDefinitionMap.put("/webjars/springfox-swagger-ui/**", "anon");
filterChainDefinitionMap.put("/configuration/security", "anon");
filterChainDefinitionMap.put("/configuration/ui", "anon");
filterChainDefinitionMap.put("/login/ajaxLogin", "anon");
filterChainDefinitionMap.put("/login/unauth", "anon");
filterChainDefinitionMap.put("/login/logout", "anon");
filterChainDefinitionMap.put("/login/register","anon");
filterChainDefinitionMap.put("/**", "authc");
shiroFilterFactoryBean.setLoginUrl("/login/unauth");
shiroFilterFactoryBean.setFilterChainDefinitionMap(filterChainDefinitionMap);
return shiroFilterFactoryBean;
}
/**
* shiro安全管理器（权限验证核心配置）
**/
@Bean
public SecurityManager securityManager() {
DefaultWebSecurityManager securityManager = new DefaultWebSecurityManager();
securityManager.setRealm(myShiroRealm());
securityManager.setSessionManager(sessionManager());
securityManager.setCacheManager(cacheManager());
return securityManager;
}
/**
* 会话管理
**/
@Bean
public SessionManager sessionManager() {
MySessionManager sessionManager = new MySessionManager();
sessionManager.setSessionIdUrlRewritingEnabled(false); //取消登陆跳转URL后面的jsessionid参数
sessionManager.setSessionDAO(sessionDAO());
sessionManager.setGlobalSessionTimeout(-1);//不过期
return sessionManager;
}
/**
* 使用的是shiro-redis开源插件 缓存依赖
**/
@Bean
public RedisManager redisManager() {
RedisManager redisManager = new RedisManager();
redisManager.setHost(host+":"+port);
redisManager.setTimeout(timeout);
redisManager.setPassword(password);
return redisManager;
}
/**
* 使用的是shiro-redis开源插件 session持久化
**/
public RedisSessionDAO sessionDAO() {
RedisSessionDAO redisSessionDAO = new RedisSessionDAO();
redisSessionDAO.setRedisManager(redisManager());
return redisSessionDAO;
}
/**
* 缓存管理
**/
@Bean
public CacheManager cacheManager() {
RedisCacheManager redisCacheManager = new RedisCacheManager();
redisCacheManager.setRedisManager(redisManager());
return redisCacheManager;
}
/**
* 权限管理
**/
@Bean
public MyShiroRealm myShiroRealm() {
return new MyShiroRealm();
}
}
2、MyShiroRealm 用户身份验证、自定义权限。
public class MyShiroRealm extends AuthorizingRealm {
private Logger logger= LoggerFactory.getLogger(MyShiroRealm.class);
@Resource
UserDao userDao;
@Override
protected AuthorizationInfo doGetAuthorizationInfo(PrincipalCollection principalCollection) {
logger.info("===================权限验证==================");
return null;
}
@Override
protected AuthenticationInfo doGetAuthenticationInfo(AuthenticationToken authenticationToken) throws AuthenticationException {
UsernamePasswordToken token=(UsernamePasswordToken) authenticationToken;
User currentUser=userDao.findUser(token.getUsername());
if(null == currentUser){
throw new AuthenticationException("账户不存在");
}
if(!currentUser.getPassword().equals(new String(token.getPassword()))){
throw new IncorrectCredentialsException("账户密码不正确");
}
if(currentUser.getIsdel()==1){
throw new LockedAccountException("账户已冻结");
}
Subject subject = SecurityUtils.getSubject();
BIUser biUser=new BIUser();
biUser.setUserId(currentUser.getUserId());
biUser.setOrgId(currentUser.getOrgid());
biUser.setUserName(currentUser.getUsername());
biUser.setPassword(currentUser.getPassword());
biUser.setSessionId(subject.getSession().getId().toString());
biUser.setIsdel(currentUser.getIsdel());
biUser.setCreateTime(currentUser.getCreatetime());
logger.info("======已授权"+biUser.toString()+"====");
return new SimpleAuthenticationInfo(biUser,biUser.getPassword(),biUser.getUserName());
}
}
3、MySessionManager。shiro权限验证是根据客户端Cookie中的JSESSIONID值来确定身份是否合格。前后端分离后这个地方需要处理。客户端调用服务端登陆接口，验证通过后返回给客户端一个token值（这里我放的是sessionid）。客户端保存token值，然后调用其他接口时把token值放在header中。对前端来说也就是放在ajax的headers参数中。
public class MySessionManager extends DefaultWebSessionManager {
private static final String AUTHORIZATION = "Authorization";
private static final String REFERENCED_SESSION_ID_SOURCE = "Stateless request";
public MySessionManager() {
}
@Override
protected Serializable getSessionId(ServletRequest request, ServletResponse response) {
//从前端ajax headers中获取这个参数用来判断授权
String id = WebUtils.toHttp(request).getHeader(AUTHORIZATION);
if (StringUtils.hasLength(id)) {
request.setAttribute(ShiroHttpServletRequest.REFERENCED_SESSION_ID_SOURCE, REFERENCED_SESSION_ID_SOURCE);
request.setAttribute(ShiroHttpServletRequest.REFERENCED_SESSION_ID, id);
request.setAttribute(ShiroHttpServletRequest.REFERENCED_SESSION_ID_IS_VALID, Boolean.TRUE);
return id;
} else {
//从前端的cookie中取值
return super.getSessionId(request, response);
}
}
}
4、MyFormAuthorizationFilter。对于跨域的POST请求，浏览器发起POST请求前都会发送一个OPTIONS请求已确定服务器是否可用，OPTIONS请求通过后继续执行POST请求，而shiro自带的权限验证是无法处理OPTIONS请求的，所以这里需要重写isAccessAllowed方法。
public class MyFormAuthorizationFilter extends FormAuthenticationFilter {
protected boolean isAccessAllowed(ServletRequest servletRequest, ServletResponse servletResponse, Object o) {
HttpServletRequest httpServletRequest = WebUtils.toHttp(servletRequest);
if ("OPTIONS".equals(httpServletRequest.getMethod())) {
return true;
}
return super.isAccessAllowed(servletRequest, servletResponse, o);
}
}
5、处理跨域
@Override
public void addCorsMappings(CorsRegistry registry) {
registry.addMapping("/**")
.allowedOrigins("*")
.allowedMethods("PUT", "DELETE", "GET", "POST")
.allowedHeaders("*")
.exposedHeaders("access-control-allow-headers", "access-control-allow-methods", "access-control-allow" +
"-origin", "access-control-max-age", "X-Frame-Options","Authorization")
.allowCredentials(false).maxAge(3600);
}