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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:
$ n1 b0 b6 {1 _# |1、设置你的服务器" target=_blank>服务器的iis,给doc等后缀名做映射- W7 @: K0 e! r, q' a
2、在向客户端发送时设置其contenttype
/ t( ]& u6 j: l+ M$ u2 C% e下面详细说明方法2 - P, X& D/ L& W- a! u6 g; R& W, Z
<%
) d( L- s0 X* W8 [. H0 s4 s4 qResponse.Buffer = true
9 {: u- N0 h7 v9 JResponse.Clear
9 V3 T7 {1 x' J3 T- ldim url
# h1 @1 m. E7 cDim fso,fl,flsize
- d! E, m6 j5 b1 }2 adim Dname6 r# T5 H6 B5 E+ _9 I: S+ L
Dim objStream,ContentType,flName,isre,url1
5 R# U% q4 z. E4 y! y'*********************************************调用时传入的下载文件名
" l+ W! ~0 d: D t9 A' d1 YDname=trim(request("n"))
9 F6 f" C/ m5 O# q% A2 s1 c' @* F'******************************************************************
8 C4 r6 @# F/ T+ L0 i( Q+ F. dIf Dname<>"" Then
1 A' \1 }/ h+ ^* Y* B% ?3 C'******************************下载文件存放的服务端目录1 {- q" s2 U7 \8 ^& Y; z# Z M, L
url=server.MapPath("/")&"\"&Dname
5 ~! {. X3 D; O( Z* x7 E2 t'***************************************************
+ ?7 n. H2 X: q# FEnd If
& N7 S. M* j/ W) @Set fso=Server.CreateObject("Scripting.FileSystemObject")0 W! ?! d& p) C/ h4 K
Set fl=fso.getfile(url)
: V2 f0 g3 y# f8 G& [7 Q7 \ W& W flsize=fl.size9 p1 e1 M9 n( I0 {
flName=fl.name
! N7 e3 @) A0 L" n: _& t( ^ Set fl=Nothing& N& _0 f g9 D' u
Set fso=Nothing r, v7 v* z( d) }6 h6 K# U
%>1 d: D0 O( M7 u2 g" V
<%
; `/ l1 j; z) ~/ a7 X9 I Set objStream = Server.CreateObject("ADODB.Stream")8 O2 P0 n1 |/ z9 ?, Q9 |, Q# L2 S
objStream.Open
, j7 e' p, M6 \& u. N objStream.Type = 1- N/ I$ r: g E
objStream.LoadFromFile url
9 y5 ]$ D8 s0 F0 S3 ~7 Z
& \. n& A8 e9 k+ D/ x* U/ x7 \ Select Case lcase(Right(flName, 4))
" F! ]5 Q& O. t2 E Case ".asf"" d7 B5 ] j" p) K" c( g' ^ g
ContentType = "video/x-ms-asf"1 E$ E7 H! w: a$ f! p# Y: F% |
Case ".avi"8 i- ~) Q" P! M7 X6 ?
ContentType = "video/avi"6 i1 Q: z. d. p1 x
Case ".doc"$ c- s; F# f" S2 H6 [* G
ContentType = "application/msword"8 W+ l1 V9 U8 b% ?: L
Case ".zip"9 ~7 a: W k" `# ^9 g$ @
ContentType = "application/zip"# m$ c" \) X E* f/ h+ a
Case ".xls"
* E3 I( p; @6 w" a ContentType = "application/vnd.ms-excel"
+ ~4 q7 p! i7 z# W8 p, c0 t Case ".gif"
9 ~# \# b0 ~ f% S. B* k) _ ContentType = "image/gif"
& u$ D0 a! G" o: n. m$ M2 c& P1 @ Case ".jpg", "jpeg"( @+ j9 `& q9 ~) n. G B; Y( c
ContentType = "image/jpeg"- ]8 k1 g8 F9 Z6 C( M# f+ G/ [
Case ".wav"
$ O, F7 r+ Y! ?- H8 N% s! b ContentType = "audio/wav"
# \) w* {5 R9 @8 a+ l5 C Case ".mp3"
1 ^2 D$ y4 f) a, E( s- i ContentType = "audio/mpeg3"
3 H, f' d6 p+ m0 U( Z0 @# d Case ".mpg", "mpeg"4 f) C9 Y" @4 c! L
ContentType = "video/mpeg"
! {- I- l3 Y$ B: z) X3 R- x Case ".rtf"
) P8 H1 ?, L: p) q- [1 O ContentType = "application/rtf"
4 r3 {: J! ?. s, w( |# X5 `) Z Case ".htm", "html"' P | J. j8 w1 @: S# R- j
ContentType = "text/html"
: L, i; t3 { }# v Case ".txt"
2 I* M3 T- l; K" g0 e) w ContentType = "text/plain"" A" `6 D% M! i, P
Case Else- a# i* W( G& }4 C' |1 { F* N
ContentType = "application/octet-stream"- c/ M; P& K6 p4 r: S: D, i
End Select * ~% `# P* b7 R' O; T
, A5 }) u: r6 w. _4 B- L3 b
Response.AddHeader "Content-Disposition", "attachment; filename=" & flName
: r4 q9 k! `4 S$ } Response.AddHeader "Content-Length", flsize 1 U# z$ \4 A- A* {& s3 C
Response.Charset = "UTF-8"1 }0 O/ ]* T% ^& g/ \5 G# H1 a8 G1 Z
Response.ContentType = ContentType 4 Q E' o. v5 s
Response.BinaryWrite objStream.Read
3 f/ C! z4 G" c& W( ` Response.Flush
# Y$ S0 l9 j$ D7 S4 { response.Clear()- _+ R* \& Q! Q2 l
objStream.Close
) z' f7 X, q* |* g* f" Y: D1 j Set objStream = Nothing
$ m5 d/ x1 Q9 c( u+ F& N%> : n9 E; U: z3 a) j
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!
: y+ }3 t8 `$ A. q/ w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
# a z9 N, K6 Q8 g% C2 \7 f6 z$ r0 W在这个程序的最前面如果加上一个判断:
9 ]# D3 h* A% o) z% ]6 _+ `if instr(Request.ServerVariables("HTTP_REFERER"),"http://你的_blank>域名")=0 then
& t7 V5 ]& F2 N, B6 r5 w5 L Response.End
4 I8 N( e) B2 I1 z4 H+ K/ t% o) fend if
: P9 r9 }8 J0 T% g. e& w就能够很好的防止别人的盗链了 |