package com.dsh.course.util;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;

import javax.servlet.http.HttpServletRequest;

@Component
public class TokenUtil {


    @Autowired
    private com.dsh.course.util.RedisUtil redisUtil;


    public Integer getUserIdFormRedis(HttpServletRequest request) throws Exception {
        String requestHeader = request.getHeader("Authorization");
        if (requestHeader != null && requestHeader.startsWith("Bearer ")) {
            requestHeader = requestHeader.substring(requestHeader.indexOf(" ") + 1);
            String key = null;
            int length = requestHeader.length();
            if(length > 32){
                key = requestHeader.substring(length - 32);
            }else{
                key = requestHeader;
            }
            String value = redisUtil.getValue(key);
            return null != value ? Integer.valueOf(value) : null;
        }else{
            return null;
        }
    }
}