隐藏真实下载地址防盗链的代码

2022-07-15 80酷酷网 80kuku.com

　　要防止用户直接复制这个地址就能下载, 而必须是前一个页面跳转过来的文件(如: www.a.cn/down.asp?id=xx),才可以.比如需要用户必须登陆才可以下载。

<%
call downloadFile("1.gif")
function downloadFile(strFile)
strFilename = server.MapPath(strFile)
Response.Buffer = True
Response.Clear
Set s = Server.CreateObject("ADODB.Stream")
s.Open
s.Type = 1
on error resume next
Set fso = Server.CreateObject("Scripting.FileSystemObject")
if not fso.FileExists(strFilename) then
      Response.Write("<h1>Error:</h1>" & strFilename & " does not exist<p>")
      Response.End
end if
Set f = fso.GetFile(strFilename)
intFilelength = f.size
s.LoadFromFile(strFilename)
if err then
      Response.Write("<h1>Error: </h1>" & err.Description & "<p>")
      Response.End
end if
Response.AddHeader "Content-Disposition", "attachment; filename=" & f.name
Response.AddHeader "Content-Length", intFilelength
Response.CharSet = "UTF-8"
Response.ContentType = "application/octet-stream"
Response.BinaryWrite s.Read
Response.Flush
s.Close
Set s = Nothing
End Function
%>