本程序，利用link.kuww.com的数据获得页面的pagerank值。
是asp中使用xmlhttp的一个很好的例子。
<%
Dim Str,r,p
Function GetPage(url,url2)
dim SendData,Retrieval
Set Retrieval = CreateObject("Microsoft.XMLHTTP")
With Retrieval
.Open "post", url, False
SendData="url="&url2
.setRequestHeader "Content-Type", "application/x-www-form-urlencoded"
.setRequestHeader "User-agent", "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.0; .NET CLR 1.1.4322)"
.Send(SendData)
GetPage = BytesToBstr(.ResponseBody)
End With
Set Retrieval = Nothing
End Function
Function BytesToBstr(body)
dim objstream
set objstream = Server.CreateObject("adodb.stream")
objstream.Type = 1
objstream.Mode =3
objstream.Open
objstream.Write body
objstream.Position = 0
objstream.Type = 2
objstream.Charset = "GB2312"
BytesToBstr = objstream.ReadText
objstream.Close
set objstream = nothing
End Function
Function GetContent(str,start,last,n)
If Instr(lcase(str),lcase(start))>0 then
select case n
case 0 '左右都截取（都取前面）（去处关键字）
GetContent=Right(str,Len(str)-Instr(lcase(str),lcase(start))-Len(start)+1)
GetContent=Left(GetContent,Instr(lcase(GetContent),lcase(last))-1)
case 1 '左右都截取（都取前面）（保留关键字）
GetContent=Right(str,Len(str)-Instr(lcase(str),lcase(start))+1)
GetContent=Left(GetContent,Instr(lcase(GetContent),lcase(last))+Len(last)-1)
case 2 '只往右截取（取前面的）（去除关键字）
GetContent=Right(str,Len(str)-Instr(lcase(str),lcase(start))-Len(start)+1)
end select
Else
GetContent=""
End if
End function
r=Request.ServerVariables("HTTP_REFERER")
str=GetPage("http://link.kuww.net/pr.asp?act=search",r)
p=GetContent(str,"在GOOGLE 上的PR值为：</font><font color=""#FF0000""><b>","</b></font></p>",0)
response.Write "document.write ("""&p&""");"
%>
