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if createdir(localaddr) = false then
 response.Write "創建目錄失敗，請檢查目錄權限"
 response.End
end if
response.Write Convert2LocalAddr(url,localaddr,localdir)

function Convert2LocalAddr(url,localaddr,localdir)
  '參數說明
  'url 頁面地址
  'localaddr 保存本地的物理地址
  'localdir 相對路徑
 strContent = getHTTPPage(url)
 Set objRegExp = New Regexp
 objRegExp.IgnoreCase = True
 objRegExp.Global = True
 objRegExp.Pattern = "<img.+?>"
 Set Matches =objRegExp.Execute(strContent)
 For Each Match in Matches
  RetStr = RetStr & GetRemoteImages(Match.Value)
 Next
 ImagesArray=split(RetStr,"||")
 RemoteImage=""
 LocalImage=""
 for i=1 to ubound(ImagesArray)
  if ImagesArray(i)<>"" and instr(RemoteImage,ImagesArray(i))<1 then
   fname=baseurl&cstr(i&mid(ImagesArray(i),instrrev(ImagesArray(i),".")))
   ImagesFileName = ImagesArray(i)
   AllowFileExtArray = split(AllowFileExt,"|")
   isGetFile = false
   for tmp = 0 to ubound(AllowFileExtArray)
    if lcase(GetFileExt(ImagesFileName)) = ALlowFileExtArray(tmp) then
     isGetFile=True
    end if
   next
   if isGetFile = true then
    newfilename =  GenerateRandomFileName(fname)
    call Save2Local(ImagesFileName,localaddr & "/" & newfilename)
    RemoteImage=RemoteImage&"||"& ImagesFileName
    LocalImage=LocalImage&"||" & localdir & newfilename
   end if
  end if
 next
 arrnew=split(LocalImage,"||")
 arrall=split(RemoteImage,"||")
 for i=1 to ubound(arrnew)
  strContent=replace(strContent,arrall(i),arrnew(i))
 next
 Convert2LocalAddr = strContent
end function

function GetRemoteImages(str)
 Set objRegExp1 = New Regexp
 objRegExp1.IgnoreCase = True
 objRegExp1.Global = True
 objRegExp1.Pattern = "http://.+? "
 set mm=objRegExp1.Execute(str)
 For Each Match1 in mm
  tmpaddr = left(Match1.Value,len(Match1.Value)-1)
  GetRemoteImages=GetRemoteImages&"||" & replace(replace(tmpaddr,"""",""),"'","")
 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 getHTTPimg(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
 getHTTPimg=Http.responseBody
 set http=nothing
 if err.number<>0 then err.Clear
end function

function Save2Local(from,tofile)
 dim geturl,objStream,imgs
 geturl=trim(from)
 imgs=gethttpimg(geturl)
 Set objStream = Server.CreateObject("ADODB.Stream")
 objStream.Type =1
 objStream.Open
 objstream.write imgs
 objstream.SaveToFile tofile,2
 objstream.Close()
 set objstream=nothing
end function

function geturlencodel(byval url)'中文文件名轉換
 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 GenerateRandomFileName(ByVal szFilename) '根據原文件名，自動以日期YYYY-MM-DD-RANDOM格式生成新文件名
    Randomize
    ranNum = Int(90000 * Rnd) + 10000
    If Month(Now) < 10 Then c_month = "0" & Month(Now) Else c_month = Month(Now)
    If Day(Now) < 10 Then c_day = "0" & Day(Now) Else c_day = Day(Now)
    If Hour(Now) < 10 Then c_hour = "0" & Hour(Now) Else c_hour = Hour(Now)
    If Minute(Now) < 10 Then c_minute = "0" & Minute(Now) Else c_minute = Minute(Now)
    If Second(Now) < 10 Then c_second = "0" & Second(Now) Else c_second = Minute(Now)
    fileExt_a = Split(szFilename, ".")
    FileExt = LCase(fileExt_a(UBound(fileExt_a)))
    GenerateRandomFileName = Year(Now) & c_month & c_day & c_hour & c_minute & c_second & "_" & ranNum & "." & FileExt
End Function

Function CreateDIR(ByVal LocalPath) '建立目錄的程序，如果有多級目錄，則一級一級的創建
    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
%>

有一點要注意的是，這里只是分析了以 http開頭的圖片的地址。否則不下載圖片，可以轉換一下地址就行了，再提供幾個小函數，分析地址用的：

Function findurl(thisurl)
 if thisurl <> "" Then
 findurl=""
 strlen=InStr(8,thisurl,"/")
 If strlen=0 Then strlen =1
 findurl=Mid(thisurl,strlen,28)
 end if
end Function

function findurlpath(thisurl)
 thisurl = replace(thisurl,"http://","@@")
 ary_tmp = split(thisurl,"/")
 for tmp = 0 to ubound(ary_tmp)
  if tmp < ubound(ary_tmp) then
   urltmp = urltmp & "/" & ary_tmp(tmp)
  end if
 next
 urltmp = right(urltmp,len(urltmp)-1)
 findurlpath = replace(urltmp,"@@","http://") & "/"
end function

function findurlhost(thisurl)
 thisurl = replace(thisurl,"http://","@@")
 ary_tmp = split(thisurl,"/")
 urltmp = ary_tmp(0)
 findurlhost = replace(urltmp,"@@","http://") & "/"
 findurlhost = left(findurlhost,len(findurlhost)-1)
end function