ASP实现文件直接下载的代码

　　<%@ 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-Length,intFilelength
Response.CharSet = UTF-8
output the file to the browser
Response.BinaryWrite s.Read
Response.Flush
tidy up
s.Close
Set s = Nothing
End Function
end if
%>