package com.ygj.yuemum.shiro;
import org.apache.shiro.web.servlet.ShiroHttpServletRequest;
import org.apache.shiro.web.session.mgt.DefaultWebSessionManager;
import org.apache.shiro.web.util.WebUtils;
import org.springframework.util.StringUtils;

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

/**
 * Description:shiro框架 自定义session获取方式
 * 可自定义session获取规则。这里采用ajax请求头authToken携带sessionId的方式
 *
 * @author zlp
 * @create 2018-05-24 10:04
 **/
public class ShiroSessionManager extends DefaultWebSessionManager {

    private static final String AUTHORIZATION = "JSESSIONID";

    private static final String REFERENCED_SESSION_ID_SOURCE = "Stateless request";

    public ShiroSessionManager(){
        super();
    }

    @Override
    protected Serializable getSessionId(ServletRequest request, ServletResponse response){
        String id = WebUtils.toHttp(request).getHeader(AUTHORIZATION);
        if(StringUtils.isEmpty(id)){
            //如果没有携带id参数则按照父类的方式在cookie进行获取
            return super.getSessionId(request, response);
        }else{
            //如果请求头中有 authToken 则其值为sessionId
            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;
        }
    }
}