From c066e153be4349bd54832d187d2bb8e82cdcfc7b Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E8=80=81=E4=B9=9D?= <366193849@qq.com>
Date: Sun, 19 Sep 2021 13:55:23 +0800
Subject: [PATCH] =?UTF-8?q?=E9=85=8D=E7=BD=AE=E5=8F=98=E5=8C=96=E5=88=B7?=
 =?UTF-8?q?=E6=96=B0dns=E7=BC=93=E5=AD=98?=
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---
 FastGithub.Dns/DnsInterceptor.cs | 10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

diff --git a/FastGithub.Dns/DnsInterceptor.cs b/FastGithub.Dns/DnsInterceptor.cs
index e9ae3fb..f812ced 100644
--- a/FastGithub.Dns/DnsInterceptor.cs
+++ b/FastGithub.Dns/DnsInterceptor.cs
@@ -2,6 +2,7 @@
 using DNS.Protocol.ResourceRecords;
 using FastGithub.Configuration;
 using Microsoft.Extensions.Logging;
+using Microsoft.Extensions.Options;
 using System;
 using System.Buffers.Binary;
 using System.Linq;
@@ -29,18 +30,21 @@ namespace FastGithub.Dns
         /// </summary>    
         [DllImport("dnsapi.dll", EntryPoint = "DnsFlushResolverCache", SetLastError = true)]
         private static extern void DnsFlushResolverCache();
-
         /// <summary>
-        /// dns投毒后台服务
+        /// dns拦截器
         /// </summary>
         /// <param name="fastGithubConfig"></param>
         /// <param name="logger"></param>
+        /// <param name="options"></param>
         public DnsInterceptor(
             FastGithubConfig fastGithubConfig,
-            ILogger<DnsInterceptor> logger)
+            ILogger<DnsInterceptor> logger,
+            IOptionsMonitor<FastGithubOptions> options)
         {
             this.fastGithubConfig = fastGithubConfig;
             this.logger = logger;
+
+            options.OnChange(_ => DnsFlushResolverCache());
         }
 
         /// <summary>