利用JS获取IE客户端IP及MAC的实现

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。在ASP.NET中,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 =NICPost.asp  method =post >< INPUT  value =00:05:5D:0E:C7:FA  name =txtMACAddr >   < INPUT  value =192.168.0.2  name =txtIPAddr >   < INPUT  value =typ  name =txtDNSName >   </ FORM ></ BODY ></ HTML >

关键是用到两个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，脚本可以是js或Vbs我个人喜欢用js。