token过期自动续费方案和实现
package com.liu.token.filter;
import com.alibaba.fastjson.JSON;
import com.liu.token.common.CustomException;
import com.liu.token.utlis.JwtUtil;
import io.jsonwebtoken.Claims;
import lombok.extern.slf4j.Slf4j;
import org.springframework.util.AntPathMatcher;
import javax.servlet.*;
import javax.servlet.annotation.WebFilter;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.util.*;
@Slf4j
@WebFilter
public class LoginFilter implements Filter {
// 路径匹配器
public static final AntPathMatcher PATH_MATCHER = new AntPathMatcher();
@Override
public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {
HttpServletRequest request = (HttpServletRequest) servletRequest;
HttpServletResponse response = (HttpServletResponse) servletResponse;
//1、获取本次请求的URI
String requestURI = request.getRequestURI();
log.info("拦截到请求：{}", requestURI);
// 定义不需要处理的请求路径
String[] urls = new String[]{
"/user/login"
};
//2、判断本次请求是否需要处理
boolean check = check(urls, requestURI);
//3、如果不需要处理，则直接放行
if (check) {
log.info("本次请求{}不需要处理", requestURI);
filterChain.doFilter(request, response);
return;
}
String access_token = request.getHeader("access_token");
String refresh_token = request.getHeader("refresh_token");
if (access_token==null||refresh_token==null){
throw new CustomException("没有登录,请登录!");
}
HashMap<String,Object> map = new HashMap();
response.setCharacterEncoding("UTF-8");
response.setContentType("application/json");
try { // 过期了会报错，就会执行catch代码块
Claims claims = JwtUtil.parseJWT(access_token);
} catch (Exception e) {
try {
Claims claims = JwtUtil.parseJWT(refresh_token);
System.out.println(claims);
String id = claims.get("sub").toString();
String jwt = JwtUtil.createJWT(id, 60 * 1000l);
map.put("code",401);
map.put("msg","刷新token");
map.put("data",jwt);
response.getWriter().write(JSON.toJSONString(map));
response.getWriter().close();
} catch (Exception ex) {
map.put("code",402);
map.put("msg","token已经过期，请重新登录！");
map.put("data",null);
response.getWriter().write(JSON.toJSONString(map));
response.getWriter().close();
}
}
filterChain.doFilter(request, response);
}
/**
* 路径匹配，检查本次请求是否需要放行
*
* @param urls
* @param requestURL
* @return
*/
public boolean check(String[] urls, String requestURL) {
for (String url : urls) {
boolean match = PATH_MATCHER.match(url, requestURL);
if (match) {
return true;
}
}
return false;
}
}