4dkankan-center-scene/src/main/java/com/fdkankan/scene/Interceptor/TokenInterceptor.java

package com.fdkankan.scene.Interceptor;


import cn.hutool.http.ContentType;
import com.alibaba.fastjson.JSON;
import com.fdkankan.common.constant.ErrorCode;
import com.fdkankan.redis.constant.RedisKey;
import com.fdkankan.redis.util.RedisUtil;
import com.fdkankan.web.response.ResultData;
import java.io.IOException;
import java.nio.charset.StandardCharsets;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang3.StringUtils;
import org.apache.http.HttpHeaders;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;
import org.springframework.web.servlet.HandlerInterceptor;

@Component
@Slf4j
public class TokenInterceptor implements HandlerInterceptor {

	@Autowired
	private RedisUtil redisUtil;

	@Override
	public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
		response.setHeader(HttpHeaders.CONTENT_TYPE, ContentType.JSON.getValue());
		response.setCharacterEncoding(StandardCharsets.UTF_8.name());
		String token = request.getHeader("token");
		log.info("token:{}", token);
		if(StringUtils.isEmpty(token)){
			this.needLogin(request,response);
			return false;
		}
		try {
			String redisKey = String.format(RedisKey.USER_TOKEN_KEY, token);
			log.info("redisKey:{}", redisKey);
			if(redisUtil.hasKey(redisKey)){
				log.info("redis有token");
				redisUtil.expire(redisKey,2 * 60 * 60);
				return true;
			}
		}catch (Exception e){
			log.error("校验token缓存出错", e);
		}
		log.info("redis无token");
		this.needLogin(request,response);
		return false;
	}

	private void needLogin(HttpServletRequest request, HttpServletResponse response) {
		try {
			ResultData error = ResultData.error(ErrorCode.TOKEN_NOT_FOUND);
			response.getWriter().append(JSON.toJSONString(error));
		} catch (IOException e) {
			log.info("LoginInterceptor|needLogin|IOException|" + e);
			e.printStackTrace();
		}
	}

}