diff --git a/packages/mitmproxy/src/lib/dns/https.js b/packages/mitmproxy/src/lib/dns/https.js
index 49a4946..d2c6807 100644
--- a/packages/mitmproxy/src/lib/dns/https.js
+++ b/packages/mitmproxy/src/lib/dns/https.js
@@ -4,43 +4,48 @@ const BaseDNS = require('./base')
 const log = require('../../utils/util.log')
 const dohQueryAsync = promisify(doh.query)
 
-module.exports = class DNSOverHTTPS extends BaseDNS {
-  constructor(dnsServer) {
-    super();
-    this.dnsServer = dnsServer;
+const PRESETS = {
+  'github.com': ['20.27.177.113', '20.205.243.166', '20.200.245.247'],
+  'api.github.com': ['20.27.177.116', '20.205.243.168', '20.200.245.245']
+}
+
+class DNSOverHTTPS extends BaseDNS {
+  constructor (dnsServer) {
+    super()
+    this.dnsServer = dnsServer
+    this.lastLookupError = null // 添加属性来记录最后一次查询错误
   }
 
-  async _lookup(hostname) {
-    // 直接判断域名是否为example.com
-    if (hostname === 'github.com') {
-      log.info('域名github.com使用内置IP集')
-      // 返回预设的IP地址集
-      return ['20.27.177.113', '20.205.243.166', '20.200.245.247']
-      // 20.27.177.113日本(三网平均延时88MS(三网优秀)) 20.205.243.166新加坡(三网平均延时96MS(电信联通106.5平均延时，移动平均77MS)) 20.200.245.247韩国(三网平均108ms(移动平均120ms))
-    }
-    if (hostname === 'api.github.com') {
-      log.info('域名api.github.com使用内置IP集')
-      // 返回预设的IP地址集
-      return ['20.27.177.116', '20.205.243.168', '20.200.245.245']
+  processQueryResult (result) {
+    if (result.answers.length === 0) {
+      log.error('该域名没有ip地址解析:', result.name)
+      return []
     }
+    return result.answers
+      .filter(item => item.type === 'A')
+      .map(item => item.data)
+  }
 
+  async _lookup (hostname) {
+    const preset = PRESETS[hostname]
+    if (preset) {
+      log.debug(`使用预设IP集：${hostname}`)
+      return preset
+    }
     try {
-      const result = await dohQueryAsync({ url this.dnsServer }, [{ type 'A', name hostname }])
-      if (result.answers.length === 0) {
-        // 说明没有获取到ip
-        log.info('该域名没有ip地址解析', hostname)
-        return [];
+      const result = await dohQueryAsync({ url: this.dnsServer }, [{ type: 'A', name: hostname }])
+      const ips = this.processQueryResult(result)
+      if (ips.length > 0) {
+        log.info('获取到域名地址：', hostname, ips)
       }
-      const ret = result.answers.filter(item => item.type === 'A').map(item => item.data)
-      if (ret.length === 0) {
-        log.info('该域名没有IPv4地址解析', hostname)
-      } else {
-        log.info('获取到域名地址：', hostname, JSON.stringify(ret))
-      }
-      return ret;
+      this.lastLookupError = null // 重置错误记录
+      return ips
     } catch (e) {
-      log.warn('DNS query error', hostname, ', dns', this.dnsServer, ', error', e)
-      return [];
+      log.error('DNS查询错误:', hostname, ', DNS服务器:', this.dnsServer, ', 错误:', e)
+      this.lastLookupError = e // 记录错误
+      throw e // 重新抛出错误，让调用者处理
     }
   }
 }
+
+module.exports = DNSOverHTTPS