网站获取真实IP地址的方法
ASP篇
写了下asp取真实IP的代码，搭环境测试无代理、一级或多级代理的情况，可以正常获取
function checkip(checkstring)'用正则判断IP是否合法
dim re1
set re1=new RegExp
re1.pattern="^[0-9]{1,3}.[0-9]{1,3}.[0-9]{1,3}.[0-9]{1,3}$"
re1.global=false
re1.Ignorecase=false
checkip=re1.test(checkstring)
set re1=nothing
end function
function get_cli_ip()'取真实IP函数，先 HTTP_CLIENT_IP 再 HTTP_X_FORWARDED_FOR 再 REMOTE_ADDR
dim client_ip
if checkip(Request.ServerVariables("HTTP_CLIENT_IP"))=true then
get_cli_ip = checkip(Request.ServerVariables("HTTP_CLIENT_IP"))
else
MyArray = split(Request.ServerVariables("HTTP_X_FORWARDED_FOR"),",")
if ubound(MyArray)>=0 then
client_ip = trim(MyArray(0))
if checkip(client_ip)=true then
get_cli_ip = client_ip
exit function
end if
end if
get_cli_ip = Request.ServerVariables("REMOTE_ADDR")
end if
end function
---------------------------------------------------------------------
aspx vb.net篇
aspx vb.net获取真实IP的函数如下：
<script runat="server">
Public Function CheckIp(ByVal ip As String) As Boolean
Dim pat As String = "^[0-9]{1,3}.[0-9]{1,3}.[0-9]{1,3}.[0-9]{1,3}$"
Dim reg As Regex = New Regex(pat)
if ip = "" Then
CheckIp = False
exit Function
end if
CheckIp = reg.IsMatch(ip)
End Function
Public Function get_cli_ip() As String
If ( Not( System.Web.HttpContext.Current.Request.ServerVariables("HTTP_CLIENT_IP") Is Nothing) And CheckIp(System.Web.HttpContext.Current.Request.ServerVariables("HTTP_CLIENT_IP")) = True) Then
get_cli_ip = System.Web.HttpContext.Current.Request.ServerVariables("HTTP_CLIENT_IP")
Exit Function
ElseIf Not(System.Web.HttpContext.Current.Request.ServerVariables("HTTP_X_FORWARDED_FOR") Is Nothing) Then
Dim ips() As String = Split(System.Web.HttpContext.Current.Request.ServerVariables("HTTP_X_FORWARDED_FOR"), ",")
For i As Integer = 0 To ips.Length - 1
If CheckIp(Trim(ips(i))) = True Then
get_cli_ip = Trim(ips(i))
Exit Function
End If
Next
End If
get_cli_ip = System.Web.HttpContext.Current.Request.ServerVariables("REMOTE_ADDR")
End Function
</script>
完整的测试页面：
<%@ Page Language="VB" AutoEventWireup="false" CodeFile="Default.aspx.vb" Inherits="_Default" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<script runat="server">
Public Function CheckIp(ByVal ip As String) As Boolean
Dim pat As String = "^[0-9]{1,3}.[0-9]{1,3}.[0-9]{1,3}.[0-9]{1,3}$"
Dim reg As Regex = New Regex(pat)
if ip = "" Then
CheckIp = False
exit Function
end if
CheckIp = reg.IsMatch(ip)
End Function
Public Function get_cli_ip() As String
If ( Not( System.Web.HttpContext.Current.Request.ServerVariables("HTTP_CLIENT_IP") Is Nothing) And CheckIp(System.Web.HttpContext.Current.Request.ServerVariables("HTTP_CLIENT_IP")) = True) Then
get_cli_ip = System.Web.HttpContext.Current.Request.ServerVariables("HTTP_CLIENT_IP")
Exit Function
ElseIf Not(System.Web.HttpContext.Current.Request.ServerVariables("HTTP_X_FORWARDED_FOR") Is Nothing) Then
Dim ips() As String = Split(System.Web.HttpContext.Current.Request.ServerVariables("HTTP_X_FORWARDED_FOR"), ",")
For i As Integer = 0 To ips.Length - 1
If CheckIp(Trim(ips(i))) = True Then
get_cli_ip = Trim(ips(i))
Exit Function
End If
Next
End If
get_cli_ip = System.Web.HttpContext.Current.Request.ServerVariables("REMOTE_ADDR")
End Function
</script>
<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
<title>Untitled Page</title>
</head>
<body>
<%
Dim client_ip As String = get_cli_ip()
System.Web.HttpContext.Current.Response.Write(client_ip)
%>
</body>
</html>
------------------------------------------------------------------------
PHP篇
取真实IP的php代码
if ($_SERVER["HTTP_X_FORWARDED_FOR"]) {
if ($_SERVER["HTTP_CLIENT_IP"]) {
$proxy = $_SERVER["HTTP_CLIENT_IP"];
} else {
$proxy = $_SERVER["REMOTE_ADDR"];
}
$ip = $_SERVER["HTTP_X_FORWARDED_FOR"];
} else {
if ($_SERVER["HTTP_CLIENT_IP"]) {
$ip = $_SERVER["HTTP_CLIENT_IP"];
} else {
$ip = $_SERVER["REMOTE_ADDR"];
}
}
echo "Your IP $ip";
if (isset($proxy)) {
echo "Your proxy IP is $proxy";
}
