下载网页中的所有资源

下载网页中的所有资源

看过一篇关于下载网页中图片的文章，它只能下载以http头的图片，我做了些改进，可以下载网页中的所有连接资源，并按照网页中的目录结构建立本地目录，存放资源。 
download.asp?url=你要下载的网页

download.asp代码如下

<% 
Server.ScriptTimeout=9999 
function SaveToFile(from,tofile) 
on error resume next 
dim geturl,objStream,imgs 
geturl=trim(from) 
Mybyval=getHTTPstr(geturl) 
Set objStream = Server.CreateObject("ADODB.Stream") 
objStream.Type =1 
objStream.Open 
objstream.write Mybyval 
objstream.SaveToFile tofile,2 
objstream.Close() 
set objstream=nothing 
if err.number<>0 then err.Clear 
end function

function geturlencodel(byval url)'中文文件名转换 
Dim i,code 
geturlencodel="" 
if trim(Url)="" then exit function 
for i=1 to len(Url) 
code=Asc(mid(Url,i,1)) 
if code<0 Then code = code + 65536 
If code>255 Then 
geturlencodel=geturlencodel&"%"&Left(Hex(Code),2)&"%"&Right(Hex(Code),2) 
else 
geturlencodel=geturlencodel&mid(Url,i,1) 
end if 
next 
end function 
function getHTTPPage(url) 
on error resume next 
dim http 
set http=Server.createobject("Msxml2.XMLHTTP") 
Http.open "GET",url,false 
Http.send() 
if Http.readystate<>4 then exit function 
getHTTPPage=bytes2BSTR(Http.responseBody) 
set http=nothing 
if err.number<>0 then err.Clear 
end function

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

function getFileName(byval filename) 
if instr(filename,"/")>0 then 
fileExt_a=split(filename,"/") 
getFileName=lcase(fileExt_a(ubound(fileExt_a))) 
if instr(getFileName,"?")>0 then 
getFileName=left(getFileName,instr(getFileName,"?")-1) 
end if 
else 
getFileName=filename 
end if 
end function

function getHTTPstr(url) 
on error resume next 
dim http 
set http=server.createobject("MSXML2.XMLHTTP") 
Http.open "GET",url,false 
Http.send() 
if Http.readystate<>4 then exit function 
getHTTPstr=Http.responseBody 
set http=nothing 
if err.number<>0 then err.Clear 
end function

Function CreateDIR(ByVal LocalPath) '建立目录的程序，如果有多级目录，则一级一级的创建 
On Error Resume Next 
LocalPath = Replace(LocalPath, "\", "/") 
Set FileObject = server.CreateObject("Scripting.FileSystemObject") 
patharr = Split(LocalPath, "/") 
path_level = UBound(patharr) 
For I = 0 To path_level 
If I = 0 Then pathtmp = patharr(0) & "/" Else pathtmp = pathtmp & patharr(I) & "/" 
cpath = Left(pathtmp, Len(pathtmp) - 1) 
If Not FileObject.FolderExists(cpath) Then FileObject.CreateFolder cpath 
Next 
Set FileObject = Nothing 
If Err.Number <> 0 Then 
CreateDIR = False 
Err.Clear 
Else 
CreateDIR = True 
End If 
End Function

function GetfileExt(byval filename) 
fileExt_a=split(filename,".") 
GetfileExt=lcase(fileExt_a(ubound(fileExt_a))) 
end function

function getvirtual(str,path,urlhead) 
if left(str,7)="http://" then 
url=str 
elseif left(str,1)="/" then 
start=instrRev(str,"/") 
if start=1 then 
url="/" 
else 
url=left(str,start) 
end if 
url=urlhead&url 
end function