用ASP获取客户端IP地址的方法

　　Private Function getIP()
　　
　　Dim strIPAddr
　　
　　If Request.ServerVariables("HTTP_X_FORWARDED_FOR") = "" OR InStr(Request.ServerVariables("HTTP_X_FORWARDED_FOR"), "unknown") > 0 Then
　　
　　strIPAddr = Request.ServerVariables("REMOTE_ADDR")
　　
　　ElseIf InStr(Request.ServerVariables("HTTP_X_FORWARDED_FOR"), ",") > 0 Then
　　
　　strIPAddr = Mid(Request.ServerVariables("HTTP_X_FORWARDED_FOR"), 1, InStr(Request.ServerVariables("HTTP_X_FORWARDED_FOR"), ",")-1)
　　
　　ElseIf InStr(Request.ServerVariables("HTTP_X_FORWARDED_FOR"), ";") > 0 Then
　　
　　strIPAddr = Mid(Request.ServerVariables("HTTP_X_FORWARDED_FOR"), 1, InStr(Request.ServerVariables("HTTP_X_FORWARDED_FOR"), ";")-1)
　　
　　Else
　　
　　strIPAddr = Request.ServerVariables("HTTP_X_FORWARDED_FOR")
　　
　　End If
　　
　　getIP = Trim(Mid(strIPAddr, 1, 30))
　　
　　End Function