在做B/S结构的系统时,我们常常需要获取客户端的一些信息,如IP和MAC,以结合身份验证。要获取服务器端的MAC很容易,但是要获取客户端的MAC的地址确要花费一翻心思,通常的做法是调用Win32API或直接调用nbtstat命令,这样做有很多问题,而另一种方法就是直接用客户端脚本,我们这里用Javascript,这样做的好处是不需要服务器端进行处理,有客户端自行获取,传递到服务器端,且速度和可靠性都比在服务器端获取好。
具体实现的html和javascript如下:
<HTML><HEAD><TITLE>WMI Scripting HTML</TITLE> <META http-equiv=Content-Type content="text/html; charset=gb2312"> <SCRIPT language=JScript event="OnCompleted(hResult,pErrorObject, pAsyncContext)" for=foo> document.forms[0].txtMACAddr.value=unescape(MACAddr); document.forms[0].txtIPAddr.value=unescape(IPAddr); document.forms[0].txtDNSName.value=unescape(sDNSName); //document.formbar.submit(); </SCRIPT> <SCRIPT language=JScript event=OnObjectReady(objObject,objAsyncContext) for=foo> if(objObject.IPEnabled != null && objObject.IPEnabled != "undefined" && objObject.IPEnabled == true) { if(objObject.MACAddress != null && objObject.MACAddress != "undefined") MACAddr = objObject.MACAddress; if(objObject.IPEnabled && objObject.IPAddress(0) != null && objObject.IPAddress(0) != "undefined") IPAddr = objObject.IPAddress(0); if(objObject.DNSHostName != null && objObject.DNSHostName != "undefined") sDNSName = objObject.DNSHostName; } </SCRIPT> <META content="MSHTML 6.00.2800.1106" name=GENERATOR></HEAD> <BODY> <OBJECT id=locator classid=CLSID:76A64158-CB41-11D1-8B02-00600806D9B6 VIEWASTEXT></OBJECT> <OBJECT id=foo classid=CLSID:75718C9A-F029-11d1-A1AC-00C04FB6C223></OBJECT> <SCRIPT language=JScript> var service = locator.ConnectServer(); var MACAddr ; var IPAddr ; var DomainAddr; var sDNSName; service.Security_.ImpersonationLevel=3; service.InstancesOfAsync(foo, 'Win32_NetworkAdapterConfiguration'); </SCRIPT> <FORM id="formfoo" name="formbar" action="index.do" method="post"><INPUT value="00-11-11-B4-52-EF" name="txtMACAddr"> <INPUT value="210.42.38.50" name="txtIPAddr"> <INPUT value="zhupan" name="txtDNSName"> </FORM></BODY></HTML>
其实最关键的还是用到两个ActiveX:
<OBJECT id=locator classid=CLSID:76A64158-CB41-11D1-8B02-00600806D9B6 VIEWASTEXT></OBJECT>
<OBJECT id=foo classid=CLSID:75718C9A-F029-11d1-A1AC-00C04FB6C223></OBJECT>
不过这两个ActiveX都是系统自带,不用去下载或注册。
接下来的工作就是用脚本和ActiveX交互