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所以我們需要加上IP訪問時(shí)間限制，防止一個(gè)IP多次訪問請(qǐng)求，導(dǎo)致整個(gè)網(wǎng)站崩潰。

自定義注解：

import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;

/**
 * 自定義注解，用于攔截過于頻繁的請(qǐng)求
 */
@Retention(RetentionPolicy.RUNTIME)
@Target(ElementType.METHOD)
public @interface AccessLimit {
    int seconds();
    int maxCount();
    boolean needLogin() default true;
}

自定義攔截器：
我采用了拋出自定義異常的方式來解決相同IP多次訪問的問題：
throw new DujiaoshouException(20001,"操作過于頻繁");

import com.qykhhr.dujiaoshouservice.exceptionhandler.DujiaoshouException;
import com.qykhhr.dujiaoshouservice.mycomment.AccessLimit;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.stereotype.Component;
import org.springframework.web.method.HandlerMethod;
import org.springframework.web.servlet.HandlerInterceptor;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.util.concurrent.TimeUnit;

/**
 * 自定義攔截器
 */
@Component
public class AccessLimtInterceptor implements HandlerInterceptor {

    @Autowired
    private RedisTemplate redisTemplate;

    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {

        if (handler instanceof HandlerMethod) {
            HandlerMethod hm = (HandlerMethod) handler;
            AccessLimit accessLimit = hm.getMethodAnnotation(AccessLimit.class);
            if (null == accessLimit) {
                return true;
            }
            int seconds = accessLimit.seconds();
            int maxCount = accessLimit.maxCount();
            boolean needLogin = accessLimit.needLogin();

            if (needLogin) {
                //判斷是否登錄
            }
            String ip=request.getRemoteAddr();
            String key = request.getServletPath() + ":" + ip ;
            Integer count = (Integer) redisTemplate.opsForValue().get(key);

            if (null == count || -1 == count) {
                redisTemplate.opsForValue().set(key, 1,seconds, TimeUnit.SECONDS);
                return true;
            }

            if (count < maxCount) {
                count = count+1;
                redisTemplate.opsForValue().set(key, count,0);
                return true;
            }

            //  response 返回 json 請(qǐng)求過于頻繁請(qǐng)稍后再試
            throw new DujiaoshouException(20001,"操作過于頻繁");
        }

        return true;
    }
}

在webconfig中配置攔截器

import com.qykhhr.dujiaoshouservice.Interceptor.AccessLimtInterceptor;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.config.annotation.InterceptorRegistry;
import org.springframework.web.servlet.config.annotation.ResourceHandlerRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter;

/**
 * 在webconfig中配置攔截器
 */
@Configuration
public class MyWebMvcConfigurer extends WebMvcConfigurerAdapter {

    @Autowired
    private AccessLimtInterceptor accessLimtInterceptor;

    @Override
    public void addInterceptors(InterceptorRegistry registry) {
        registry.addInterceptor(accessLimtInterceptor);
        super.addInterceptors(registry);
    }
}

在Controller前面加上注解就可以生效了

@RestController
public class AppHomeController {

    @GetMapping("/index")
    @AccessLimit(seconds = 1, maxCount = 3) //1秒內(nèi) 允許請(qǐng)求3次
    public R getImageList(){
        return R.ok().data("appHome","hahaha");
    }
}

使用python發(fā)送100次請(qǐng)求，可以發(fā)現(xiàn)請(qǐng)求被攔截了多少

在這里插入圖片描述

對(duì)于注解，我們也可以不使用它，但是我們需要在攔截器中寫入固定的參數(shù)。

到此這篇關(guān)于SpringBoot防止大量請(qǐng)求攻擊的實(shí)現(xiàn)的文章就介紹到這了,更多相關(guān)SpringBoot防止大量請(qǐng)求攻擊內(nèi)容請(qǐng)搜索腳本之家以前的文章或繼續(xù)瀏覽下面的相關(guān)文章希望大家以后多多支持腳本之家！

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