From 5f1f296213550c34fb098e07e82e8463f6833e95 Mon Sep 17 00:00:00 2001
From: wwqgtxx <wwqgtxx@gmail.com>
Date: Sun, 27 Jul 2025 12:30:33 +0800
Subject: [PATCH] chore: add `/cache/dns/flush` to restful api

---
 component/resolver/resolver.go | 8 ++++++++
 dns/patch_android.go           | 7 +------
 hub/route/cache.go             | 6 ++++++
 3 files changed, 15 insertions(+), 6 deletions(-)

diff --git a/component/resolver/resolver.go b/component/resolver/resolver.go
index 44ad2d71..e87a9103 100644
--- a/component/resolver/resolver.go
+++ b/component/resolver/resolver.go
@@ -230,10 +230,18 @@ func ResolveECH(ctx context.Context, host string) ([]byte, error) {
 	return ResolveECHWithResolver(ctx, host, DefaultResolver)
 }
 
+func ClearCache() {
+	if DefaultResolver != nil {
+		go DefaultResolver.ClearCache()
+	}
+	go SystemResolver.ClearCache() // SystemResolver unneeded check nil
+}
+
 func ResetConnection() {
 	if DefaultResolver != nil {
 		go DefaultResolver.ResetConnection()
 	}
+	go SystemResolver.ResetConnection() // SystemResolver unneeded check nil
 }
 
 func SortationAddr(ips []netip.Addr) (ipv4s, ipv6s []netip.Addr) {
diff --git a/dns/patch_android.go b/dns/patch_android.go
index 8e744fcd..cad718b6 100644
--- a/dns/patch_android.go
+++ b/dns/patch_android.go
@@ -9,12 +9,7 @@ import (
 var systemResolver []dnsClient
 
 func FlushCacheWithDefaultResolver() {
-	if r := resolver.DefaultResolver; r != nil {
-		r.ClearCache()
-	}
-	if r := resolver.SystemResolver; r != nil {
-		r.ClearCache()
-	}
+	resolver.ClearCache()
 	resolver.ResetConnection()
 }
 
diff --git a/hub/route/cache.go b/hub/route/cache.go
index f07eb33a..78bda737 100644
--- a/hub/route/cache.go
+++ b/hub/route/cache.go
@@ -12,6 +12,7 @@ import (
 func cacheRouter() http.Handler {
 	r := chi.NewRouter()
 	r.Post("/fakeip/flush", flushFakeIPPool)
+	r.Post("/dns/flush", flushDnsCache)
 	return r
 }
 
@@ -24,3 +25,8 @@ func flushFakeIPPool(w http.ResponseWriter, r *http.Request) {
 	}
 	render.NoContent(w, r)
 }
+
+func flushDnsCache(w http.ResponseWriter, r *http.Request) {
+	resolver.ClearCache()
+	render.NoContent(w, r)
+}