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
>
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,脚本可以是js或Vbs都可以,不过我个人喜欢用js。下一篇我将具体的谈谈在服务器端结合.net获取客户端MAC的方法,并比较这几中方法的优劣。