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在_blank>浏览器的地址栏里直接输入一个doc或xls或jpg的文件的url路径,那么该文件会直接显示在_blank>浏览器里。而在很多时候我们希望能直接弹出下载提示框让用户下载,我们该怎么办呢?这里有两种方法:8 B% Q8 x3 I5 R/ R+ P
1、设置你的服务器" target=_blank>服务器的iis,给doc等后缀名做映射 R' n4 i9 ^# J. E1 A) O
2、在向客户端发送时设置其contenttype
$ g6 C# B- h8 P下面详细说明方法2 ) g Z6 G3 a5 ^* n) g8 N
<%) k j. P+ a Y* k- W% c
Response.Buffer = true# [2 h5 q4 R n) N9 M+ @' _! F7 o
Response.Clear # ]' r# G+ J, t' p$ }
dim url! z& o* l! G5 I( ?6 B4 P& n0 Z
Dim fso,fl,flsize
8 O+ ^# _/ h2 ?* H5 bdim Dname
' ]' k& Y. {" p c& DDim objStream,ContentType,flName,isre,url1
( _ N" n+ G) o) p; z: Z'*********************************************调用时传入的下载文件名
( z) {- S- y) q# Y$ RDname=trim(request("n"))2 j7 L4 S0 l! I. p* u
'******************************************************************2 X* F( W8 ^9 F2 W) p
If Dname<>"" Then( H# ?5 S4 T2 O4 ?2 ^$ b& t
'******************************下载文件存放的服务端目录
{: H# y7 x- z url=server.MapPath("/")&"\"&Dname! {7 q7 o+ t) u/ a
'***************************************************+ F4 I9 G5 H) j6 M0 ~' r
End If ! U+ r. z4 v( U( Q5 a
Set fso=Server.CreateObject("Scripting.FileSystemObject")
1 ?# ]# l3 [. U/ S- P9 j Set fl=fso.getfile(url)
: u$ f8 M0 V' r flsize=fl.size
0 D" X' n2 Q9 b" h5 i( O- m+ T flName=fl.name' v; K# u9 M, j( S# B+ \+ f
Set fl=Nothing
7 l* a/ G' [. C( F Set fso=Nothing
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<% j/ U \( X& f# P/ Y0 \& C1 ~
Set objStream = Server.CreateObject("ADODB.Stream")
* X$ y! Z4 h) @, D objStream.Open
' V4 X0 C7 ~/ T; N1 w9 { objStream.Type = 1
1 q- d6 X1 N2 E% U objStream.LoadFromFile url , q: f" t/ u5 E" k
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Select Case lcase(Right(flName, 4))7 V* d# \+ ]% S* A% ^3 A
Case ".asf"
& L: L) W. A" W- t ContentType = "video/x-ms-asf"
6 A# V& ^! M O Case ".avi"
8 ~# r% J0 N1 G3 w) [2 a ContentType = "video/avi"* l: P* N2 D, y4 `5 \
Case ".doc"
8 e* @5 ?( R( a+ ~" I ContentType = "application/msword"# [. T/ \' k! p. I2 |& t6 c- ` O/ U6 ?
Case ".zip"2 Q$ m& `% Y* _3 g Z
ContentType = "application/zip"
+ L5 A( q3 [3 g H; ~ Case ".xls") h; Y7 i3 u* B$ _
ContentType = "application/vnd.ms-excel"( g' |8 O& p3 [" j9 Z. [
Case ".gif"
; a* Y! b+ o0 p ContentType = "image/gif"0 q/ a3 L6 y" _
Case ".jpg", "jpeg"+ ]; n: K: P/ i+ Y) l3 ^, o
ContentType = "image/jpeg"7 I+ |/ `+ ?. e! B7 |/ P: V
Case ".wav"
, e; B4 N. M1 o) B# x, q9 H: L ContentType = "audio/wav"
& m0 p* W P+ x! o" I- \0 C Case ".mp3"
" b) ?# i: V% ]% C" }1 b" @8 A ContentType = "audio/mpeg3"
+ m5 _' v+ }& p! Z Case ".mpg", "mpeg"; {: e* ^3 K0 y0 W
ContentType = "video/mpeg"0 r) ^2 | F [7 n- I3 b
Case ".rtf"" W: t0 V) \6 N1 I+ N' r
ContentType = "application/rtf"+ ?4 A3 V8 E" c
Case ".htm", "html"
1 J% r, E# U1 k: T z& ] ContentType = "text/html". J$ Y0 K- Y1 l! c
Case ".txt"# H- d) M P; H0 {' [4 x) ?/ \# G
ContentType = "text/plain"
2 [3 t" d- s" E9 v4 Z Case Else" b2 y& d6 U) t) U* G& }& D
ContentType = "application/octet-stream"
- e& I0 x+ n P3 S( s End Select
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Response.AddHeader "Content-Disposition", "attachment; filename=" & flName
0 S' T# | W+ M$ d. [/ J Response.AddHeader "Content-Length", flsize
. b9 v1 f% ^% B7 @1 e4 u9 F' E Response.Charset = "UTF-8"
0 k; C5 \, y3 c6 D; E Response.ContentType = ContentType 4 O8 V2 C0 y" C: H& z) F% u8 O6 i
Response.BinaryWrite objStream.Read
4 i' k* p, a( Q2 q Response.Flush
! w' p: D% k' @" F" u response.Clear()5 w6 v! w0 f, P& z6 v, G$ a8 y
objStream.Close
" o4 F9 I4 i# y. k1 x Set objStream = Nothing + N9 ~' f; _: b: K* R
%>
6 T8 F4 {9 C: G/ N; O/ U将下面的东西存成download.asp然后你就可以用<a herf="download!http://www.knowsky.com/download.asp?n=file.doc">download!</a>来下载同一目录下的file.doc了!
8 `1 S% q1 `4 T但是这里有个问题就是直接将file.doc路径写在url里是不安全的,所以解决方案应该是将file.doc的路径存到数据库" target=_blank>数据库里,同过查找数据库" target=_blank>数据库后得到路径
2 |& B2 z( [$ z- B: Y在这个程序的最前面如果加上一个判断:
2 x4 ?# `0 q/ Z n" e, {if instr(Request.ServerVariables("HTTP_REFERER"),"http://你的_blank>域名")=0 then
3 P6 ]3 f. k% @5 g" A6 I: J Response.End, W& q3 r9 `6 E! Q; ]
end if 5 \" S3 h! I( e
就能够很好的防止别人的盗链了 |