用ASP编写下载网页中所有资源的程序

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：

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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

　　elseif left(str,3)="../" then

　　str1=mid(str,inStrRev(str,"../")+2)

　　ar=split(str,"../")

　　lv=ubound(ar)+1

　　ar=split(path,"/")

　　url="/"

　　for i=1 to (ubound(ar)-lv)

　　　url=url&ar(i)

　　next

　　url=url&str1

　　url=urlhead&url

　else

　　url=urlhead&str

　end if

　getvirtual=url

end function

'示例代码

dim dlpath

virtual="/downweb/"

truepath=server.MapPath(virtual)

if request("url")＜＞ "" then

　url=request("url")

　fn=getFileName(url)

　urlhead=left(url,(instr(replace(url,"//",""),"/")+1))

　urlpath=replace(left(url,instrRev(url,"/")),urlhead,"")

　strContent = getHTTPPage(url)

　mystr=strContent

　Set objRegExp = New Regexp

　objRegExp.IgnoreCase = True

　objRegExp.Global = True

　objRegExp.Pattern = "(src|href)=.[^\＞]+? "

　Set Matches =objRegExp.Execute(strContent)

　For Each Match in Matches

　　str=Match.Value

　　str=replace(str,"src=","")

　　str=replace(str,"href=","")

　　str=replace(str,"""","")

　str=replace(str,"'","")

filename=GetfileName(str)

　　getRet=getVirtual(str,urlpath,urlhead)

　　temp=Replace(getRet,"//","**")

　　start=instr(temp,"/")

　　endt=instrRev(temp,"/")-start+1

　　if start＞0 then

　　　repl=virtual&mid(temp,start)&" "

　　　'response.Write repl&"＜br＞"

　　　mystr=Replace(mystr,str,repl)

　　dir=mid(temp,start,endt)

　　temp=truepath&Replace(dir,"/","\")

　　CreateDir(temp)

　　'response.Write getRet&"||"&temp&filename&"＜br＞＜br＞"

　　SaveToFile getRet,temp&filename

　end if

Next

set Matches=nothing

end if

%＞