ASP实现保存远程图片到本机

<% 
'先下载远程图片 
url="http://www.aspbc.com/uploadfile/adv/s20111015104708.jpg" '远程图片地址 
savepath=server.mappath("img") '图片保存到当前目录下的img文件夹中
'为文件重命名 
randomize 
ranNum=int(999*rnd) 
filename=year(now)&month(now)&day(now)&hour(now)&minute(now)&second(now)&ranNum 
'为文件重命名结束 
set xmlhttp=server.createobject("Microsoft.XMLHTTP") 
xmlhttp.open "get",url,false 
xmlhttp.send 
img = xmlhttp.ResponseBody 
set xmlhttp=nothing 
set objAdostream=server.createobject("ADODB.Stream") 
objAdostream.Open() 
objAdostream.type=1 
objAdostream.Write(img) 
objAdostream.SaveToFile(savepath&filename&".jpg") 
objAdostream.SetEOS 
set objAdostream=nothing 
'文件下载结束 
Set Upload = Server.CreateObject("Persits.Upload") '打开对象 
Set File = Upload.OpenFile(savepath&filename&".jpg") '打开已经保存的文件 
If File.ImageType <> "JPG" and File.ImageType <> "GIF" and File.ImageType <> "BMP" and File.ImageType <> "PNG" Then 
	Upload.DeleteFile savepath&filename&".jpg" '如果格式不正确就删除这张已下载的图片 
	response.write "错误的图片格式" 
end if 
'注销实例 
Set Upload = nothing 
Set File = nothing 
%>