IP黑名单介绍实战

根据官方文档发现RuleBasedIpFilter，进行IP过滤实现黑白名单处理。
官方文档地址如下：https://netty.io/4.1/api/io/netty/handler/ipfilter/IpFilterRule.html

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public class IpFilterRuleHandler extends RuleBasedIpFilter {
    private BlackService blackService = SpringUtil.getBean(BlackService.class);
    @Override
    protected boolean accept(ChannelHandlerContext ctx, InetSocketAddress remoteAddress) throws Exception {
        String hostAddress = remoteAddress.getHostString();//ip信息
        IpFilterRuleType filterRuleType = IpFilterRuleType.ACCEPT;//通过
        if(StrUtil.isNotBlank(hostAddress)){
            boolean isReject = blackService.checkBlackList(hostAddress);//检测实时黑名单
            if(isReject){
                filterRuleType = IpFilterRuleType.REJECT;//拒绝创建
            }
        }
        return filterRuleType == IpFilterRuleType.ACCEPT;
    }
}

当然IP过滤处理掉我们如何使用呢

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 //代码片段
ServerBootstrap b = new ServerBootstrap();
 b.group(bossGroup, workerGroup).channel(NioServerSocketChannel.class)
         .childHandler(new ChannelInitializer<NioSocketChannel>() {
             @Override
             public void initChannel(NioSocketChannel ch) throws Exception {
                 // 注册handler
                 ch.pipeline().addLast(new IpFilterRuleHandler());//添加IP过滤
             }
         })
     );

快来实践看结果吧