本文小编为大家详细介绍“Spring Boot如何防止接口恶意刷新和暴力请求”，内容详细，步骤清晰，细节处理妥当，希望这篇“Spring Boot如何防止接口恶意刷新和暴力请求”文章能帮助大家解决疑惑，下面跟着小编的思路慢慢深入，一起来学习新知识吧。
首先创建一个自定义的拦截器类，也是最核心的代码;
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/**
* @package: com.technicalinterest.group.interceptor
* @className: IpUrlLimitInterceptor
* @description: ip+url重复请求现在拦截器
* @author: Shuyu.Wang
* @date: 2019-10-12 12:34
* @since: 0.1
**/
@Slf4j
public class IpUrlLimitInterceptor implements HandlerInterceptor {
private RedisUtil getRedisUtil() {
return SpringContextUtil.getBean(RedisUtil.class);
}
private static final String LOCK_IP_URL_KEY="lock_ip_";
private static final String IP_URL_REQ_TIME="ip_url_times_";
private static final long LIMIT_TIMES=5;
private static final int IP_LOCK_TIME=60;
@Override
public boolean preHandle(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, Object o) throws Exception {
log.info("request请求地址uri={},ip={}", httpServletRequest.getRequestURI(), IpAdrressUtil.getIpAdrress(httpServletRequest));
if (ipIsLock(IpAdrressUtil.getIpAdrress(httpServletRequest))){
log.info("ip访问被禁止={}",IpAdrressUtil.getIpAdrress(httpServletRequest));
ApiResult result = new ApiResult(ResultEnum.LOCK_IP);
returnJson(httpServletResponse, JSON.toJSONString(result));
return false;
}
if(!addRequestTime(IpAdrressUtil.getIpAdrress(httpServletRequest),httpServletRequest.getRequestURI())){
ApiResult result = new ApiResult(ResultEnum.LOCK_IP);
returnJson(httpServletResponse, JSON.toJSONString(result));
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 {
}
/**
* @Description: 判断ip是否被禁用
* @author: shuyu.wang
* @date: 2019-10-12 13:08
* @param ip
* @return java.lang.Boolean
*/
private Boolean ipIsLock(String ip){
RedisUtil redisUtil=getRedisUtil();
if(redisUtil.hasKey(LOCK_IP_URL_KEY+ip)){
return true;
}
return false;
}
/**
* @Description: 记录请求次数
* @author: shuyu.wang
* @date: 2019-10-12 17:18
* @param ip
* @param uri
* @return java.lang.Boolean
*/
private Boolean addRequestTime(String ip,String uri){
String key=IP_URL_REQ_TIME+ip+uri;
RedisUtil redisUtil=getRedisUtil();
if (redisUtil.hasKey(key)){
long time=redisUtil.incr(key,(long)1);
if (time>=LIMIT_TIMES){
redisUtil.getLock(LOCK_IP_URL_KEY+ip,ip,IP_LOCK_TIME);
return false;
}
}else {
redisUtil.getLock(key,(long)1,1);
}
return true;
}
private void returnJson(HttpServletResponse response, String json) throws Exception {
PrintWriter writer = null;
response.setCharacterEncoding("UTF-8");
response.setContentType("text/json; charset=utf-8");
try {
writer = response.getWriter();
writer.print(json);
} catch (IOException e) {
log.error("LoginInterceptor response error ---> {}", e.getMessage(), e);
} finally {
if (writer != null) {
writer.close();
}
}
}
}代码中redis的使用的是分布式锁的形式，这样可以最大程度保证线程安全和功能的实现效果。代码中设置的是1S内同一个接口通过同一个ip访问5次，就将该ip禁用1个小时，根据自己项目需求可以自己适当修改，实现自己想要的功能；
redis分布式锁的关键代码:
/**
* @package: com.shuyu.blog.util
* @className: RedisUtil
* @description:
* @author: Shuyu.Wang
* @date: 2019-07-14 14:42
* @since: 0.1
**/
@Component
@Slf4j
public class RedisUtil {
private static final Long SUCCESS = 1L;
@Autowired
private RedisTemplate<String, Object> redisTemplate;
// =============================common============================
/**
* 获取锁
* @param lockKey
* @param value
* @param expireTime：单位-秒
* @return
*/
public boolean getLock(String lockKey, Object value, int expireTime) {
try {
log.info("添加分布式锁key={},expireTime={}",lockKey,expireTime);
String script = "if redis.call('setNx',KEYS[1],ARGV[1]) then if redis.call('get',KEYS[1])==ARGV[1] then return redis.call('expire',KEYS[1],ARGV[2]) else return 0 end end";
RedisScript<String> redisScript = new DefaultRedisScript<>(script, String.class);
Object result = redisTemplate.execute(redisScript, Collections.singletonList(lockKey), value, expireTime);
if (SUCCESS.equals(result)) {
return true;
}
} catch (Exception e) {
e.printStackTrace();
}
return false;
}
/**
* 释放锁
* @param lockKey
* @param value
* @return
*/
public boolean releaseLock(String lockKey, String value) {
String script = "if redis.call('get', KEYS[1]) == ARGV[1] then return redis.call('del', KEYS[1]) else return 0 end";
RedisScript<String> redisScript = new DefaultRedisScript<>(script, String.class);
Object result = redisTemplate.execute(redisScript, Collections.singletonList(lockKey), value);
if (SUCCESS.equals(result)) {
return true;
}
return false;
}
}最后将上面自定义的拦截器通过registry.addInterceptor添加一下，就生效了；
@Configuration
@Slf4j
public class MyWebAppConfig extends WebMvcConfigurerAdapter {
@Bean
IpUrlLimitInterceptor getIpUrlLimitInterceptor(){
return new IpUrlLimitInterceptor();
}
@Override
public void addInterceptors(InterceptorRegistry registry) {
registry.addInterceptor(getIpUrlLimitInterceptor()).addPathPatterns("/**");
super.addInterceptors(registry);
}
}读到这里，这篇“Spring Boot如何防止接口恶意刷新和暴力请求”文章已经介绍完毕，想要掌握这篇文章的知识点还需要大家自己动手实践使用过才能领会，如果想了解更多相关内容的文章，欢迎关注亿速云行业资讯频道。
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