content: package org.ruoyi.common.idempotent.aspectj;
  
  import cn.dev33.satoken.SaManager;
  import cn.hutool.core.util.ObjectUtil;
  import cn.hutool.crypto.SecureUtil;
  import jakarta.servlet.http.HttpServletRequest;
  import jakarta.servlet.http.HttpServletResponse;
  import org.aspectj.lang.JoinPoint;
  import org.aspectj.lang.annotation.AfterReturning;
  import org.aspectj.lang.annotation.AfterThrowing;
  import org.aspectj.lang.annotation.Aspect;
  import org.aspectj.lang.annotation.Before;
  import org.ruoyi.common.core.constant.GlobalConstants;
  import org.ruoyi.common.core.domain.R;
  import org.ruoyi.common.core.exception.ServiceException;
  import org.ruoyi.common.core.utils.MessageUtils;
  import org.ruoyi.common.core.utils.ServletUtils;
  import org.ruoyi.common.core.utils.StringUtils;
  import org.ruoyi.common.idempotent.annotation.RepeatSubmit;
  import org.ruoyi.common.json.utils.JsonUtils;
  import org.ruoyi.common.redis.utils.RedisUtils;
  import org.springframework.validation.BindingResult;
  import org.springframework.web.multipart.MultipartFile;
  
  import java.time.Duration;
  import java.util.Collection;
  import java.util.Map;
  
  /**
   * 防止重复提交(参考美团GTIS防重系统)
   *
   * @author Lion Li
   */
  @Aspect
  public class RepeatSubmitAspect {
  
      private static final ThreadLocal<String> KEY_CACHE = new ThreadLocal<>();
  
      @Before("@annotation(repeatSubmit)")
      public void doBefore(JoinPoint point, RepeatSubmit repeatSubmit) throws Throwable {
          // 如果注解不为0 则使用注解数值
          long interval = 0;
          if (repeatSubmit.interval() > 0) {
              interval = repeatSubmit.timeUnit().toMillis(repeatSubmit.interval());
          }
          if (interval < 1000) {
              throw new ServiceException("重复提交间隔时间不能小于'1'秒");
          }
          HttpServletRequest request = ServletUtils.getRequest();
          String nowParams = argsArrayToString(point.getArgs());
  
          // 请求地址（作为存放cache的key值）
          String url = request.getRequestURI();
  
          // 唯一值（没有消息头则使用请求地址）
          String submitKey = StringUtils.trimToEmpty(request.getHeader(SaManager.getConfig().getTokenName()));
  
          submitKey = SecureUtil.md5(submitKey + ":" + nowParams);
          // 唯一标识（指定key + url + 消息头）
          String cacheRepeatKey = GlobalConstants.REPEAT_SUBMIT_KEY + url + submitKey;
          String key = RedisUtils.getCacheObject(cacheRepeatKey);
          if (key == null) {
              RedisUtils.setCacheObject(cacheRepeatKey, "", Duration.ofMillis(interval));
              KEY_CACHE.set(cacheRepeatKey);
          } else {
              String message = repeatSubmit.message();
              if (StringUtils.startsWith(message, "{") && StringUtils.endsWith(message, "}")) {
                  message = MessageUtils.message(StringUtils.substring(message, 1, message.length() - 1));
              }
              throw new ServiceException(message);
          }
      }
  
      /**
       * 处理完请求后执行
       *
       * @param joinPoint 切点
       */
      @AfterReturning(pointcut = "@annotation(repeatSubmit)", returning = "jsonResult")
      public void doAfterReturning(JoinPoint joinPoint, RepeatSubmit repeatSubmit, Object jsonResult) {
          if (jsonResult instanceof R r) {
              try {
                  // 成功则不删除redis数据 保证在有效时间内无法重复提交
                  if (r.getCode() == R.SUCCESS) {
                      return;
                  }
                  RedisUtils.deleteObject(KEY_CACHE.get());
              } finally {
                  KEY_CACHE.remove();
              }
          }
      }
  
      /**
       * 拦截异常操作
       *
       * @param joinPoint 切点
       * @param e         异常
       */
      @AfterThrowing(value = "@annotation(repeatSubmit)", throwing = "e")
      public void doAfterThrowing(JoinPoint joinPoint, RepeatSubmit repeatSubmit, Exception e) {
          RedisUtils.deleteObject(KEY_CACHE.get());
          KEY_CACHE.remove();
      }
  
      /**
       * 参数拼装
       */
      private String argsArrayToString(Object[] paramsArray) {
          StringBuilder params = new StringBuilder();
          if (paramsArray != null && paramsArray.length > 0) {
              for (Object o : paramsArray) {
                  if (ObjectUtil.isNotNull(o) && !isFilterObject(o)) {
                      try {
                          params.append(JsonUtils.toJsonString(o)).append(" ");
                      } catch (Exception e) {
                          e.printStackTrace();
                      }
                  }
              }
          }
          return params.toString().trim();
      }
  
      /**
       * 判断是否需要过滤的对象。
       *
       * @param o 对象信息。
       * @return 如果是需要过滤的对象，则返回true；否则返回false。
       */
      @SuppressWarnings("rawtypes")
      public boolean isFilterObject(final Object o) {
          Class<?> clazz = o.getClass();
          if (clazz.isArray()) {
              return clazz.getComponentType().isAssignableFrom(MultipartFile.class);
          } else if (Collection.class.isAssignableFrom(clazz)) {
              Collection collection = (Collection) o;
              for (Object value : collection) {
                  return value instanceof MultipartFile;
              }
          } else if (Map.class.isAssignableFrom(clazz)) {
              Map map = (Map) o;
              for (Object value : map.entrySet()) {
                  Map.Entry entry = (Map.Entry) value;
                  return entry.getValue() instanceof MultipartFile;
              }
          }
          return o instanceof MultipartFile || o instanceof HttpServletRequest || o instanceof HttpServletResponse
              || o instanceof BindingResult;
      }
  
  }
  