asp中使用流方式下载文件的代码

将下面的内容存成download.asp

然后你就可以用<a herf="http://xxx.xxx.com/download.asp?n=file.doc">download!</a>

来下载了!

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<%

Response.Buffer = true

Response.Clear

dim url

Dim fso,fl,flsize

dim Dname

Dim objStream,ContentType,flName,isre,url1

'*********************************************调用时传入的下载文件名

Dname=trim(request("n"))

'******************************************************************

If Dname<>"" Then

'******************************下载文件存放的服务端目录

url=server.MapPath("/")&"/"&Dname

'***************************************************

End If

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

Set fl=fso.getfile(url)

flsize=fl.size

flName=fl.name

Set fl=Nothing

Set fso=Nothing

%>

<%

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

objStream.Open

objStream.Type = 1

objStream.LoadFromFile url

Select Case lcase(Right(flName, 4))

Case ".asf"

ContentType = "video/x-ms-asf"

Case ".avi"

ContentType = "video/avi"

Case ".doc"

ContentType = "application/msword"

Case ".zip"

ContentType = "application/zip"

Case ".xls"

ContentType = "application/vnd.ms-excel"

Case ".gif"

ContentType = "image/gif"

Case ".jpg", "jpeg"

ContentType = "image/jpeg"

Case ".wav"

ContentType = "audio/wav"

Case ".mp3"

ContentType = "audio/mpeg3"

Case ".mpg", "mpeg"

ContentType = "video/mpeg"

Case ".rtf"

ContentType = "application/rtf"

Case ".htm", "html"

ContentType = "text/html"

Case ".txt"

ContentType = "text/plain"

Case Else

ContentType = "application/octet-stream"

End Select

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

Response.AddHeader "Content-Length", flsize

Response.Charset = "UTF-8"

Response.ContentType = ContentType

Response.BinaryWrite objStream.Read

Response.Flush

response.Clear()

objStream.Close

Set objStream = Nothing

%>

$(document).ready(function(){dp.SyntaxHighlighter.HighlightAll('code');});

原文链接：
http://blog.csdn.net/vince6799/article/details/706700