SpringBoot + Shiro 前后端分离权限

shiro 验证通过后的信息保存在session 中，而ajax 每次传的都是不同的sessionid ，所以主要的区别就是需要修改shiro获取sessionid的方式。这里使用的是登录后将后台的sessionid 传到前端然后存放到 cookie（这个存放的地方视情况而定），然后每次请求后端时在Header中携带此信息,这里起名为Authorization

shiro 中 默认获取Sessionid的类是 DefaultWebSessionManager 所以需要重写此类

import org.apache.commons.lang3.StringUtils;
import org.apache.shiro.web.servlet.ShiroHttpServletRequest;
import org.apache.shiro.web.session.mgt.DefaultWebSessionManager;
import org.apache.shiro.web.util.WebUtils;

import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import java.io.Serializable;

public class PowerShiroSessionManager extends DefaultWebSessionManager {

	/**
	 * 获取请求头中key为“Authorization”的value == sessionId
	 */
	private static final String AUTHORIZATION ="Authorization";

	private static final String REFERENCED_SESSION_ID_SOURCE = "cookie";


	@Override
	protected Serializable getSessionId(ServletRequest request, ServletResponse response) {
		// TODO Auto-generated method stub
		String sessionId = WebUtils.toHttp(request).getHeader(AUTHORIZATION);
		System.out.println(sessionId);
		if (StringUtils.isNotEmpty(sessionId)) {
			request.setAttribute(ShiroHttpServletRequest.REFERENCED_SESSION_ID_SOURCE, ShiroHttpServletRequest.COOKIE_SESSION_ID_SOURCE);
			request.setAttribute(ShiroHttpServletRequest.REFERENCED_SESSION_ID, sessionId);
			request.setAttribute(ShiroHttpServletRequest.REFERENCED_SESSION_ID_IS_VALID, Boolean.TRUE);
			return sessionId;
		}
		return super.getSessionId(request, response);
	}
}

然后在配置中配置此类

    @Bean
	public SessionManager sessionManager() {
		PowerShiroSessionManager shiroSessionManager = new PowerShiroSessionManager();
		return shiroSessionManager;
	}
    @Bean
	public SecurityManager securityManager(){
		DefaultWebSecurityManager securityManager =  new DefaultWebSecurityManager();
		securityManager.setRealm(myShiroRealm());
		//自定义session管理
		securityManager.setSessionManager(sessionManager());
		return securityManager;
	}

然后修改前端，这里前端使用的时Vue.js，登录成功后将SessionId保存到cookie中，并将请求中携带头信息

 util.setCookie("SESSIONID",data.data.sessionId,1);
 axios.defaults.headers.common['Authorization'] = util.getCookie("SESSIONID");

这样后端就能根据这个sessionid判断出用户是否通过认证