设置页面不默认缓存方法

    HTTP:
　　<META HTTP-EQUIV="pragma" CONTENT="no-cache">
　　<META HTTP-EQUIV="Cache-Control" CONTENT="no-cache, must-revalidate">
　　<META HTTP-EQUIV="expires" CONTENT="Wed, 26 Feb 1997 08:21:57 GMT">
　　<META HTTP-EQUIV="expires" CONTENT="0">
　　ASP
　　response.expires=0
　　response.addHeader("pragma","no-cache") 
　　response.addHeader("Cache-Control","no-cache, must-revalidate")
　　PHP
　　header("Expires: Mon, 26 Jul 1997 05:00:00 GMT");
　　header("Cache-Control: no-cache, must-revalidate");
　　header("Pragma: no-cache");
　　JSP：
　　response.addHeader("Cache-Control", "no-cache");
　　response.addHeader("Expires", "Thu, 01 Jan 1970 00:00:01 GMT");

asp获取真实IP方法：

     

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