在實際專案使用中,必須要考慮服務的安全性,當服務部署到網際網路以後,就要考慮服務被惡意請求和暴力攻擊的情況,下面的教學,通過Spring Boot提供的HandlerInterceptor和Redis 針對 Url + ip在一定時間記憶體取的次數來將ip禁用,可以根據自己的業務需求進行相應的修改,以達到自己的目的。
首先建立一個自定義的攔截器類,也是最核心的程式碼。
/** * @ProjectName: cdkj-framework * @Package: com.cdkjframework.core.spring.filter * @ClassName: FilterHandlerInterceptor * @Description: 攔截過濾 * @Author: xiaLin * @Date: 2022/6/22 13:36 * @Version: 1.0 */ public class FilterHandlerInterceptor implements HandlerInterceptor { /** * 紀錄檔 */ private LogUtils logUtils = LogUtils.getLogger(FilterHandlerInterceptor.class); /** * redis鎖 */ private final RedisLettuceLock redisLettuceLock; /** * IP頭部變數(可能通過Nginx代理後) */ private static final String HEADER_IP = "X-Real-IP"; /** * 鎖IP請求URL地址KEY */ private static final String LOCK_IP_URL_KEY = "lock_ip_"; /** * IP請求URL地址時間 */ private static final String IP_URL_REQ_TIME = "ip_url_times_"; /** * 極限時間 */ private static final long LIMIT_TIMES = 5; /** * IP鎖定時間 秒 */ private static final int IP_LOCK_TIME = 60; /** * 構建函數 */ public FilterHandlerInterceptor(RedisLettuceLock redisLettuceLock) { this.redisLettuceLock = redisLettuceLock; } /** * 預處理 * * @param request 請求 * @param response 響應 * @param o 引數 * @return 返回結果 * @throws Exception 異常資訊 */ @Override public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object o) throws Exception { String ip = request.getHeader(HEADER_IP); if (StringUtils.isNullAndSpaceOrEmpty(ip)) { ip = request.getRemoteAddr(); } logUtils.info("request 請求地址 Uri={},ip={}", request.getRequestURI(), ip); if (ipIsLock(ip)) { logUtils.info("ip存取被禁止={}", ip); ResponseBuilder builder = ResponseBuilder.failBuilder("ip存取被禁止"); returnJson(response, builder); return false; } if (!addRequest(ip, request.getRequestURI())) { ResponseBuilder builder = ResponseBuilder.failBuilder("ip存取被禁止"); returnJson(response, builder); return false; } return true; } @Override public void postHandle(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, Object o, ModelAndView modelAndView) throws Exception { } @Override public void afterCompletion(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, Object o, Exception e) throws Exception { } /** * IP 是否已鎖 * * @param ip IP 地址 * @return 返回是否成功 */ private Boolean ipIsLock(String ip) { if (redisLettuceLock.lock(LOCK_IP_URL_KEY + ip)) { return true; } return false; } /** * 新增請求資訊 * * @param ip IP 地址 * @param uri 請求路徑 * @return 返回是否成功 */ private Boolean addRequest(String ip, String uri) { String key = IP_URL_REQ_TIME + ip + uri; if (RedisUtils.syncExists(key)) { long time = RedisUtils.syncIncr(key, IntegerConsts.ONE); if (time >= LIMIT_TIMES) { redisLettuceLock.lock(LOCK_IP_URL_KEY + ip, IP_LOCK_TIME, ip); return false; } } else { redisLettuceLock.lock(key, (long) IntegerConsts.ONE, IntegerConsts.ONE); } return true; } /** * 返回結果 * * @param response 響應 * @param builder 返回結果 * @throws Exception 異常資訊 */ private void returnJson(HttpServletResponse response, ResponseBuilder builder) throws Exception { ResponseUtils.out(response, builder); } }
最後將上面自定義的攔截器通過WebMvcConfigurer下的registry.addInterceptor新增一下,就生效了。
/** * @ProjectName: cdkj-framework * @Package: com.cdkjframework.core.spring.filter * @ClassName: WebMvcFilterConfigurerAdapter * @Description: java類作用描述 * @Author: xiaLin * @Date: 2022/6/22 13:37 * @Version: 1.0 */ @RequiredArgsConstructor public class WebMvcFilterConfigurerAdapter implements WebMvcConfigurer { /** * redis鎖 */ private final RedisLettuceLock redisLettuceLock; /** * 過慮控制程式碼攔截器 * * @return 返回攔截器 */ @Bean private FilterHandlerInterceptor filterHandlerInterceptor() { return new FilterHandlerInterceptor(redisLettuceLock); } /** * 新增 攔截器 * * @param registry 攔截器註冊 */ @Override public void addInterceptors(InterceptorRegistry registry) { registry.addInterceptor(filterHandlerInterceptor()).addPathPatterns("/**"); } }
自己可以寫一個for迴圈來測試改功能,這裡就不具體詳細介紹了。
文章中的工具類可參考:https://gitee.com/cdkjframework/common/tree/1.0.2/