1、若依后端gateway模块配置黑名单

就是不能访问的地址。实现自定义过滤器BlackListUrlFilter，需要配置黑名单地址列表blacklistUrl，当然有其他需求也可以实现自定义规则的过滤器。

2、实现

2.1、修改nacos中gateway的配置

我们用system模块做试验

2.2、修改代码

package com.ruoyi.gateway.filter;

import java.util.ArrayList;
import java.util.List;
import java.util.regex.Pattern;
import org.springframework.cloud.gateway.filter.GatewayFilter;
import org.springframework.cloud.gateway.filter.factory.AbstractGatewayFilterFactory;
import org.springframework.stereotype.Component;
import com.ruoyi.common.core.utils.ServletUtils;

/**
 * 黑名单过滤器
 *
 * @author ruoyi
 */
@Component
public class BlackListUrlFilter extends AbstractGatewayFilterFactory<BlackListUrlFilter.Config>
{
    @Override
    public GatewayFilter apply(Config config)
    {
        return (exchange, chain) -> {
            String url = exchange.getRequest().getURI().getPath();//user/list
            //String url = exchange.getRequest().getURI().getPath();//192.168.56.1
            if (config.matchBlacklist(url))
            {
                return ServletUtils.webFluxResponseWriter(exchange.getResponse(), "请求地址不允许访问");
            }
            return chain.filter(exchange);
        };
    }

    public BlackListUrlFilter()
    {
        super(Config.class);
    }

    public static class Config
    {
        private List<String> blacklistUrl;

        private List<Pattern> blacklistUrlPattern = new ArrayList<>();

        public boolean matchBlacklist(String url)
        {
            return !blacklistUrlPattern.isEmpty() && blacklistUrlPattern.stream().anyMatch(p -> p.matcher(url).find());
        }

        public List<String> getBlacklistUrl()
        {
            return blacklistUrl;
        }

        public void setBlacklistUrl(List<String> blacklistUrl)
        {
            this.blacklistUrl = blacklistUrl;
            this.blacklistUrlPattern.clear();
            this.blacklistUrl.forEach(url -> {
                this.blacklistUrlPattern.add(Pattern.compile(url.replaceAll("\\*\\*", "(.*?)"), Pattern.CASE_INSENSITIVE));
            });
        }
    }

}

启动gateway项目访问即可