From 61f68d2b27d6322f615d97cb0dfb21f78e699dd6 Mon Sep 17 00:00:00 2001
From: kenshinx <kenshin.acs@gmail.com>
Date: Tue, 7 Jul 2015 17:32:45 +0800
Subject: [PATCH] Reinforced domain regex match

---
 hosts.go | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/hosts.go b/hosts.go
index 8357754..87bef5e 100644
--- a/hosts.go
+++ b/hosts.go
@@ -145,7 +145,7 @@ func (f *FileHosts) isDomain(domain string) bool {
 	if f.isIP(domain) {
 		return false
 	}
-	match, _ := regexp.MatchString("^[a-zA-Z0-9][a-zA-Z0-9-]", domain)
+	match, _ := regexp.MatchString(`^([a-zA-Z0-9]([a-zA-Z0-9\-]{0,61}[a-zA-Z0-9])?\.)+[a-zA-Z]{2,6}$`, domain)
 	return match
 }