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-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
%>