ASP实现文件直接下载

在IE进行文档链接时,如果遇到OLE支持的文档,IE会自动调用相应程序打开它,有时候这种功能并不是我们所需的,虽然我们可以提醒用户用鼠标右键-->"目标另存为...."命令来下载文档,但这样毕竟不太友好,本文描述了利用FSO及Stream方法实现IE直接下载文档.

<%@ language=vbscript codepage=65001%>

<%

'Filename must be input

if Request("Filename")="" then

response.write "<h1>Error:</h1>Filename is empty!<p>"

else

call downloadFile(replace(replace(Request("Filename"),"\",""),"/",""))

Function downloadFile(strFile)

' make sure you are on the latest MDAC version for this to work

' get full path of specified file

strFilename = server.MapPath(strFile)

' clear the buffer

Response.Buffer = True

Response.Clear

' create stream

Set s = Server.CreateObject("ADODB.Stream")

s.Open

' Set as binary

s.Type = 1

' load in the file

on error resume next

' check the file exists

Set fso = Server.CreateObject("Scripting.FileSystemObject")

if not fso.FileExists(strFilename) then

Response.Write("<h1>Error:</h1>"&strFilename&" does not exists!<p>")

Response.End

end if

' get length of file

Set f = fso.GetFile(strFilename)

intFilelength = f.size

s.LoadFromFile(strFilename)

if err then

Response.Write("<h1>Error: </h1>Unknown Error!<p>")

Response.End

end if

' send the headers to the users Browse

Response.AddHeader "Content-Disposition","attachment; filename="&f.name

Response.AddHeader "Content-Length",intFilelength

Response.CharSet = "UTF-8"

Response.ContentType = "application/octet-stream"

' output the file to the browser

Response.BinaryWrite s.Read

Response.Flush

' tidy up

s.Close

Set s = Nothing

End Function

end if

%>