网站导航免费论文 原创论文 论文搜索 原创论文 网学软件 学术大家 资料中心 会员中心 问题解答 原创论文 论文素材 设计下载 最新论文 下载排行 论文上传 在线投稿 联系我们
返回网学首页
网学联系
最新论文 推荐专题 热门论文 素材专题
当前位置: 网学 > 编程文档 > ASP > 正文
用ASP编写下载网页中所有资源的程序
来源:Http://myeducs.cn 联系QQ:点击这里给我发消息 作者: 用户投稿 来源: 网络 发布时间: 12/11/25
下载{$ArticleTitle}原创论文样式
  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
  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

%>  

(责任编辑:admin)

  • 上一篇资讯: ASP程序性能测试报告
  • 网学推荐

    免费论文

    原创论文

    浏览:
    设为首页 | 加入收藏 | 论文首页 | 论文专题 | 设计下载 | 网学软件 | 论文模板 | 论文资源 | 程序设计 | 关于网学 | 站内搜索 | 网学留言 | 友情链接 | 资料中心
    版权所有 QQ:3710167 邮箱:3710167@qq.com 网学网 [Myeducs.cn] 您电脑的分辨率是 像素
    Copyright 2008-2015 myeducs.Cn www.myeducs.Cn All Rights Reserved
    湘ICP备09003080号