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xmlhttp 抓取网页内容

<%
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,"")+3
over2=Instr(body,"")
body2=mid(body,start2,over2-start2)

response.write body2
%>

抓取网页。偶要实现实实更新天气预报。利用了XMLHTTP组件，抓取网页的指定部分。
需要分件html源代码
此例中的被抓取的html源代码如下
2004年8月24日星期二；白天：晴有时多云南风3—4级；夜间：晴南风3—4级；气温：最高29℃最低19℃ 
而程序中是从
以2004年8月24日为关键字搜索，直到结速
而抓取的内容就变成了"2004年8月24日星期二；白天：晴有时多云南风3—4级；夜间：晴南风3—4级；气温：最高29℃最低19℃ "
干干净净的了。记录一下。

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

<html>

<%
Dim wstr,str,url,start,over,dtime
dtime=Year(Date)&"年"&Month(Date)&"月"&Day(Date)&"日"
url="http://www.qianhuaWeb.com/"
wstr=getHTTPPage(url)
start=Newstring(wstr,dtime)
over=Newstring(wstr,"")
body=mid(wstr,start,over-start)

response.write "<MARQUEE onmouseover=this.stop(); onmouseout=this.start();>"&body&"</marquee>"

%>

</body></html>

[wangjy17908]

添加时间：2007-10-07