diff --git a/ProxyFilter/Trojan.py b/ProxyFilter/Trojan.py
index beb23b8..39e356b 100644
--- a/ProxyFilter/Trojan.py
+++ b/ProxyFilter/Trojan.py
@@ -71,14 +71,7 @@ def trojanFilter(rawInfo: dict, isExtra: bool) -> tuple[bool, str or dict]:
         })
         if not status: # 节点格式错误
             return False, result
-        stream = result['stream']
-        if stream['secure'] is not None and stream['secure']['sni'] == '': # 未指定SNI
-            if stream['type'] == 'tcp' and stream['obfs'] is not None:
-                stream['secure']['sni'] = stream['obfs']['host'].split(',')[0]
-            elif stream['type'] == 'ws':
-                stream['secure']['sni'] = stream['host']
-            elif stream['type'] == 'h2':
-                stream['secure']['sni'] = stream['host'].split(',')[0]
+        Xray.addSni(result)
         return True, result
     except:
         return False, 'Unknown error'
diff --git a/ProxyFilter/V2ray.py b/ProxyFilter/V2ray.py
index 724a499..2cc1b13 100644
--- a/ProxyFilter/V2ray.py
+++ b/ProxyFilter/V2ray.py
@@ -240,3 +240,21 @@ v2rayStreamRules = {
         }
     }
 }
+
+def addSni(info: dict) -> None:
+    stream = info['stream']
+    if stream['secure'] is None or stream['secure']['sni'] != '':  # 未指定SNI
+        return
+    if baseFunc.isDomain(info['server']):
+        stream['secure']['sni'] = info['server']
+
+    sniContent = ''
+    if stream['type'] == 'tcp' and stream['obfs'] is not None:
+        sniContent = stream['obfs']['host'].split(',')[0]
+    elif stream['type'] == 'ws':
+        sniContent = stream['host']
+    elif stream['type'] == 'h2':
+        sniContent = stream['host'].split(',')[0]
+
+    if sniContent != '':
+        stream['secure']['sni'] = sniContent
diff --git a/ProxyFilter/VLESS.py b/ProxyFilter/VLESS.py
index 6b3c694..8f2d19a 100644
--- a/ProxyFilter/VLESS.py
+++ b/ProxyFilter/VLESS.py
@@ -81,14 +81,7 @@ def vlessFilter(rawInfo: dict, isExtra: bool) -> tuple[bool, str or dict]:
         })
         if not status: # 节点格式错误
             return False, result
-        stream = result['stream']
-        if stream['secure'] is not None and stream['secure']['sni'] == '': # 未指定SNI
-            if stream['type'] == 'tcp' and stream['obfs'] is not None:
-                stream['secure']['sni'] = stream['obfs']['host'].split(',')[0]
-            elif stream['type'] == 'ws':
-                stream['secure']['sni'] = stream['host']
-            elif stream['type'] == 'h2':
-                stream['secure']['sni'] = stream['host'].split(',')[0]
+        Xray.addSni(result)
         return True, result
     except:
         return False, 'Unknown error'
diff --git a/ProxyFilter/VMess.py b/ProxyFilter/VMess.py
index 35d58cc..eacef70 100644
--- a/ProxyFilter/VMess.py
+++ b/ProxyFilter/VMess.py
@@ -95,14 +95,7 @@ def vmessFilter(rawInfo: dict, isExtra: bool) -> tuple[bool, str or dict]:
         })
         if not status: # 节点格式错误
             return False, result
-        stream = result['stream']
-        if stream['secure'] is not None and stream['secure']['sni'] == '': # 未指定SNI
-            if stream['type'] == 'tcp' and stream['obfs'] is not None:
-                stream['secure']['sni'] = stream['obfs']['host'].split(',')[0]
-            elif stream['type'] == 'ws':
-                stream['secure']['sni'] = stream['host']
-            elif stream['type'] == 'h2':
-                stream['secure']['sni'] = stream['host'].split(',')[0]
+        V2ray.addSni(result)
         return True, result
     except:
         return False, 'Unknown error'
diff --git a/ProxyFilter/Xray.py b/ProxyFilter/Xray.py
index 55ea4eb..a9f8e6d 100644
--- a/ProxyFilter/Xray.py
+++ b/ProxyFilter/Xray.py
@@ -106,3 +106,5 @@ xrayStreamRules['xtlsObject'] = {
         'format': baseFunc.toBool
     }
 }
+
+addSni = V2ray.addSni
diff --git a/ProxyFilter/baseFunc.py b/ProxyFilter/baseFunc.py
index 9f4d6dd..33eba89 100644
--- a/ProxyFilter/baseFunc.py
+++ b/ProxyFilter/baseFunc.py
@@ -5,33 +5,59 @@ import re
 import IPy
 import copy
 
-def isHost(host: str) -> bool:
+def isIpAddr(content: str) -> bool:
     """
-    判断host是否合法
+    判断是否为IP地址（IPv4 / IPv6）
 
-    IPv4 / IPv6 / Domain
+        域名: return True
 
-        合法: return True
+        非域名: return False
 
-        不合法: return False
     """
     try:
-        IPy.IP(host)
-        if host.find('/') != -1: # filter CIDR
+        if content.find('/') != -1: # filter CIDR
             return False
-        if host.find('.') == -1 and host.find(':') == -1:
+        if content.find('.') == -1 and content.find(':') == -1:
             return False
+        IPy.IP(content)
         return True # IP地址合法
     except:
-        pass
+        return False
+
+
+def isDomain(content: str) -> bool:
+    """
+    判断是否为域名
+
+        域名: return True
+
+        非域名: return False
+
+    """
     try:
         return re.search( # 域名匹配
-            r'^(?=^.{3,255}$)[a-zA-Z0-9_][a-zA-Z0-9_-]{0,62}(\.[a-zA-Z0-9_][a-zA-Z0-9_-]{0,62})+$', host
+            r'^(?=^.{3,255}$)[a-zA-Z0-9_][a-zA-Z0-9_-]{0,62}(\.[a-zA-Z0-9_][a-zA-Z0-9_-]{0,62})+$', content
         ) is not None
     except: # 异常错误
         return False
 
 
+def isHost(host: str) -> bool:
+    """
+    判断host是否合法
+
+    IPv4 / IPv6 / Domain
+
+        合法: return True
+
+        不合法: return False
+
+    """
+    if isIpAddr(host) or isDomain(host):
+        return True
+    return False
+
+
 def isPort(port: int) -> bool:
     """
     判断端口是否合法
@@ -41,6 +67,7 @@ def isPort(port: int) -> bool:
         合法: return True
 
         不合法: return False
+
     """
     try:
         if 1 <= port <= 65535: # 1 ~ 65535
diff --git a/demo.py b/demo.py
index bd3e57f..1235fa3 100644
--- a/demo.py
+++ b/demo.py
@@ -1,11 +1,38 @@
 import ProxyDecoder as Decoder
 import ProxyFilter as Filter
+import Check as Checker
 
-url = 'trojan://dnomd343@1.1.1.1:443?security=tls&type=tcp&headerType=http&host=ip.343.re'
+# url = 'trojan://dnomd343@127.0.0.1:12345?security=tls&sni=local.343.re'
+url = 'trojan://dnomd343@local.343.re:12345'
 
 ret = Decoder.decode(url)
 print(ret)
-
+#
 status, ret = Filter.filte(ret, isExtra = True)
 print(status)
 print(ret)
+
+# info = {
+#     'type': 'vmess',
+#     'server': 'baidu.com',
+#     'port': 12345,
+#     'id': 'a859f794-1fcb-422e-bcad-3264dcea1f12',
+#     'aid': 0,
+#     'stream': {
+#         'type': 'ws',
+#         'host': 'host.343.re',
+#         'secure': {
+#             # 'sni': 'sni.343.re'
+#         }
+#     }
+# }
+
+# status, ret = Filter.filte(info, isExtra = True)
+# print(status)
+# print(ret)
+
+data = Checker.proxyTest({
+    'check': ['http'],
+    'info': ret
+})
+print(data)