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禁止查看网页源代码全攻略(3) function getCookieVal (offset)
{
var endstr = document.cookie.indexOf (";", offset);
if (endstr == -1)
endstr = document.cookie.length;
return unescape(document.cookie.substring(offset, endstr));
}
function GetCookie (name)
{
var arg = name + "=";
var alen = arg.length;
var clen = document.cookie.length;
var i = 0;
while (i < clen)
{
var j = i + alen;
if (document.cookie.substring(i, j) == arg)
return getCookieVal (j);
i = document.cookie.indexOf(" ", i) + 1;
if (i == 0)
break;
}
return null;
}
function SetCookie (name, value)
{
var argv = SetCookie.arguments;
var argc = SetCookie.arguments.length;
var expires = (2 < argc) ? argv[2] : true;
var path = (3 < argc) ? argv[3] : true;
var domain = (4 < argc) ? argv[4] : true;
var secure = (5 < argc) ? argv[5] : true; //安全模式生效
document.cookie = name + "=" + escape (value) +
((expires == null) ? "" : ("; expires=" + expires.toGMTString())) +
((path == null) ? "" : ("; path=" + path)) +
((domain == null) ? "" : ("; domain=" + domain)) +
((secure == true) ? "; secure" : "");
}
function ResetCounts(name)
{
visits = 0;
SetCookie(expdate , "/", true, true);
location.reload();
}
</script>
<script language="JavaScript">
var expdate = new Date();
var visits;
expdate.setTime(expdate.getTime() + (24*60*60 * 1000)); //COOKIES超期时间设置,此处为1天
if(!(visits = GetCookie("visits")))
visits = 0;
visits++;
SetCookie(expdate, "/", true, true);
</script>
如果你已经做到这一步了,那么你的网页所受到的保护就不再是常规意义上的出于道德观念或版权意识,而是真正的技术上的保护手段.
高级研究篇
对网页的保护并不仅仅是涉及源代码的保护,更应该包含对网页数据或网络数据库的保护.对网络数据库的保护可采用基于IIS的CGI接口的认证程序,SQL的安全技术,ASP安全认证程序,Java Applet安全认证程序等手段,属于更高层次的安全措施,包含大量内容,本文不作介绍.本篇将介绍应用JavaScript技术构造的页面认证接口.将仅供有限人群访问的需要数据保护的页面中加入以下代码:
<script LANGUAGE="JAVASCRIPT">
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