xmlhttp 抓取网页内容1

xmlhttp 抓取网页内容1

- 中国WEB开发者网络 (http://www.webasp.net)
-- 技术教程 (http://www.webasp.net/article/)
--- xmlhttp 抓取网页内容1 (http://www.webasp.net/article/15/14484.htm)

-- 作者：未知
-- 发布日期： 2004-11-03

<%
On Error Resume Next
Server.ScriptTimeOut=9999999
Function getHTTPPage(Path)
t = GetBody(Path)
getHTTPPage=BytesToBstr(t,"GB2312")
End function

Function bytes2BSTR(vIn)
strReturn = ""
For j = 1 To LenB(vIn)
ThisCharCode = AscB(MidB(vIn,j,1))
If ThisCharCode < &H80 Then
strReturn = strReturn & Chr(ThisCharCode)
Else
NextCharCode = AscB(MidB(vIn,j+1,1))
strReturn = strReturn & Chr(CLng(ThisCharCode) * &H100 + CInt(NextCharCode))
j = j + 1
End If
Next
bytes2BSTR = strReturn
End Function

Function GetBody(url)
on error resume next
Set Retrieval = CreateObject("Microsoft.XMLHTTP")

Retrieval.Open "Get", url, False, "", ""
Retrieval.Send
GetBody =Retrieval.responsebody

Set Retrieval = Nothing
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 Newstring(wstr,strng)
Newstring=Instr(lcase(wstr),lcase(strng))
if Newstring<=0 then Newstring=Len(wstr)
End Function

%>

<%
Dim wstr,str,url,start,over,city
city = Request.QueryString("id")
url="http://cn.finance.yahoo.com/q?s=USDKRW=X&d=c"
wstr=getHTTPPage(url)
start=Newstring(wstr,"最後交易")
over=Newstring(wstr,"买方出价")
body=mid(wstr,start,over-start)

start2=Instr(body,"<b>")+3
over2=Instr(body,"</b>")
body2=mid(body,start2,over2-start2)

response.write body2
%>

webasp.net