asp编程如何抓取远程网页指定内容

<%

'用ASP获取远程目标网页指定内容，代码由广州网站建设//www.jb51.net提供

On Error Resume Next

Server.ScriptTimeOut=9999999

Function getHTTPPage(Path)

t = GetBody(Path)

getHTTPPage=BytesToBstr(t,"GB2312")

End function

Function Newstring(wstr,strng)

Newstring=Instr(lcase(wstr),lcase(strng))

if Newstring<=0 then Newstring=Len(wstr)

End Function

Function BytesToBstr(body,Cset)

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 = Cset

BytesToBstr = objstream.ReadText

objstream.Close

set objstream = nothing

End Function

Function GetBody(url)

on error resume next

Set Retrieval = CreateObject("Microsoft.XMLHTTP")

With Retrieval

.Open "Get", url, False, "", ""

.Send

GetBody = .ResponseBody

End With

Set Retrieval = Nothing

End Function

'ASP获取远程网页指定内容开始

Dim wstr,str,url,start,over,dtime

a="开始内容" 'ASP获取目标网页内容开始标记

b="结束内容" 'ASP获取网页内容结束标记

url="http://sc.jb51.net/"

wstr=getHTTPPage(url)

start=Newstring(wstr,a)

over=Newstring(wstr,b)

body=mid(wstr,start,over-start)

response.write ""&body&"" '输出获取到的网页内容

'ASP获取远程网页指定内容结束

%>

'ASP获取远程网页指定内容开始

Dim wstr,str,url,start,over,dtime

url="http://sc.jb51.net/"

wstr=getHTTPPage(url)

body=wstr

Dim wstr,str,url,start,over,dtime

url="https://www.jb51.net/"

wstr=getHTTPPage(url)

filename="index.htm"

if wstr<>"" and request("action")="makeindex" then

body=wstr

Set fso = Server.CreateObject("Scripting.FileSystemObject")

Set fout = fso.CreateTextFile(server.mappath(""&filename&""))

fout.Write body

fout.close

set fout=nothing

set fso=nothing

If Err.number=0 then

response.write("<div class=""tishi"">首页生成成功！！</div>")

end if

end if