防重复请求注解测试

相同参数，一定时间内，重复请求拦截

主要代码如下：

RepeatRequest.java 

@Target(ElementType.METHOD)
@Retention(RetentionPolicy.RUNTIME)
@Documented
public @interface RepeatRequest {
    String value() default "";
}

RepeatRequestAspect.java

@Aspect
@Component
public class RepeatRequestAspect {

    private static final Logger LOGGER = LoggerFactory.getLogger(RepeatRequestAspect.class);

    /**
     * 执行切面拦截逻辑
     */
    @Around("@annotation(repeatRequest)")
    public Object execute(ProceedingJoinPoint joinPoint, RepeatRequest repeatRequest) throws Throwable {
        if (repeatRequest != null) {
            ServletRequestAttributes attributes = (ServletRequestAttributes) RequestContextHolder.getRequestAttributes();

            StringBuffer sb=new StringBuffer("");
            //1.获取参数
            HttpServletRequest request=attributes.getRequest();
            HttpServletResponse response=attributes.getResponse();

            //ip
            sb.append("ip:");
            String ip = ToolUtil.getClientIp(request);
            sb.append(ip);

            //header
            sb.append("head:");
            Enumeration<String> headers=request.getHeaderNames();
            while(headers.hasMoreElements()){
                String heardName =headers.nextElement();
                String heardValue= request.getHeader(heardName);
                sb.append(heardName).append("=").append(heardValue).append(";");
            }

            //body
            sb.append("body:");
            Object[] args = joinPoint.getArgs();
            for (int i = 0; i < args.length; i++) {
                Object o = args[i];
                sb.append(o.toString());
            }

            //2.所有 请求头、报文体 进行组装，查询redis 是否存在记录

            LOGGER.info("sb="+sb.toString());

            //sha 加密 、base64
            QETag tag = new QETag();
            String hash = tag.calcETag(sb.toString());
            LOGGER.info("hash="+hash);

            //存redis
            String key = "request_key_" + hash;
            String value=CacheUtils.get(key);

            if(!StringUtil.isEmpty(value)){
                //3.存在记录
                //response.setStatus(304);
                //怕摘要重复 可进行value处理，碰撞几率太小，可以忽略...
                return RestResponse.failure("请勿重复请求");
            }else{
                //4.不存在记录，将所有参数组装写入redis，失效时间为3秒
                CacheUtils.put(key, sb.toString(), 3);
            }



        }
       return joinPoint.proceed();
    }


}

tag.calcETag 其实就是 sha1 加密，然后再base64 -_-

就这样啦