com.github.mengweijin.quickboot.redis.inteceptor.SameUrlDataInterceptor Maven / Gradle / Ivy

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package com.github.mengweijin.quickboot.redis.inteceptor;

import cn.hutool.extra.servlet.ServletUtil;
import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.github.mengweijin.quickboot.filter.repeatable.RepeatedlyRequestWrapper;
import com.github.mengweijin.quickboot.redis.RedisService;
import org.apache.commons.lang3.StringUtils;
import org.springframework.beans.factory.annotation.Autowired;

import javax.servlet.http.HttpServletRequest;
import java.util.HashMap;
import java.util.Map;
import java.util.concurrent.TimeUnit;

/**
 * 判断请求url和数据是否和上一次相同，
 * 如果和上次相同，则是重复提交表单。 有效时间为10秒内。
 */
public class SameUrlDataInterceptor extends RepeatSubmitInterceptor {

    public final String REPEAT_PARAMS = "repeatParams";

    public final String REPEAT_TIME = "repeatTime";

    @Autowired
    private ObjectMapper objectMapper;

    @Autowired
    private RedisService redisService;

    @SuppressWarnings("unchecked")
    @Override
    public boolean isRepeatSubmit(HttpServletRequest request, RepeatSubmit repeatSubmit) throws JsonProcessingException {
        String nowParams = "";
        if (request instanceof RepeatedlyRequestWrapper) {
            RepeatedlyRequestWrapper repeatedlyRequest = (RepeatedlyRequestWrapper) request;
            nowParams = ServletUtil.getBody(repeatedlyRequest);
        }

        // body参数为空，获取Parameter的数据
        if (StringUtils.isEmpty(nowParams)) {
            nowParams = objectMapper.writeValueAsString(request.getParameterMap());
        }
        Map nowDataMap = new HashMap<>();
        nowDataMap.put(REPEAT_PARAMS, nowParams);
        nowDataMap.put(REPEAT_TIME, System.currentTimeMillis());

        // 请求地址（作为存放cache的key值）
        String url = request.getRequestURI();

        // 唯一标识（指定key + url）
        String cacheRepeatKey = REPEAT_SUBMIT_KEY + url;

        Object sessionObj = redisService.getCacheObject(cacheRepeatKey);
        if (sessionObj != null) {
            Map sessionMap = (Map) sessionObj;
            if (sessionMap.containsKey(url)) {
                Map preDataMap = (Map) sessionMap.get(url);
                if (compareParams(nowDataMap, preDataMap) && compareTime(nowDataMap, preDataMap, repeatSubmit.interval())) {
                    return true;
                }
            }
        }
        Map cacheMap = new HashMap<>(1);
        cacheMap.put(url, nowDataMap);
        redisService.setCacheObject(cacheRepeatKey, cacheMap, repeatSubmit.interval(), TimeUnit.MILLISECONDS);
        return false;
    }

    /**
     * 判断参数是否相同
     */
    private boolean compareParams(Map nowMap, Map preMap) {
        String nowParams = (String) nowMap.get(REPEAT_PARAMS);
        String preParams = (String) preMap.get(REPEAT_PARAMS);
        return nowParams.equals(preParams);
    }

    /**
     * 判断两次间隔时间
     */
    private boolean compareTime(Map nowMap, Map preMap, int interval) {
        long time1 = (Long) nowMap.get(REPEAT_TIME);
        long time2 = (Long) preMap.get(REPEAT_TIME);
        return (time1 - time2) < interval;
    }
}