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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:0 Y1 I/ g* C' s7 P( ?0 U8 K6 J+ r! k
1、设置你的服务器" target=_blank>服务器的iis,给doc等后缀名做映射
% {$ X4 h3 e5 L. J2、在向客户端发送时设置其contenttype
& L$ p7 }' A: O! I- Q! |! U下面详细说明方法2
. {+ y- j- ^; t! x<%
( p* l) _4 v5 \* kResponse.Buffer = true
; |8 n- t# t( a* M8 FResponse.Clear
6 @; H! y: Q# hdim url
; w+ \4 e9 ?. y* W, \& g) o* `" _Dim fso,fl,flsize
}/ e) ?# Q5 I6 s# Odim Dname) A7 K1 x+ e ~) `
Dim objStream,ContentType,flName,isre,url1
1 n6 Y5 ]% `$ Q( n3 }0 a'*********************************************调用时传入的下载文件名6 N4 a, n) C! T7 O0 O ]
Dname=trim(request("n"))
+ q1 `! G( B! O5 T1 y' i'******************************************************************
# {: m( B: n) l7 Q: XIf Dname<>"" Then
/ R" c( P- c& a/ Q! c+ F'******************************下载文件存放的服务端目录1 z8 g. \3 ~# ^; \
url=server.MapPath("/")&"\"&Dname7 E. S8 z# o) y7 f/ B, ^
'***************************************************
9 c5 A2 s& D1 C' O9 ?$ H2 f1 S/ L% f& ZEnd If 6 u* |+ s; w! r4 F3 f3 V
Set fso=Server.CreateObject("Scripting.FileSystemObject")
& `! O4 ~6 \/ o r) N- I1 a3 g9 k Set fl=fso.getfile(url)- m2 e3 s c5 u' {, x
flsize=fl.size
" F$ c0 h6 X) N V/ u flName=fl.name9 c2 T2 q1 r- |; n% Y
Set fl=Nothing% b, Y% n/ v# o: I: _: m& g
Set fso=Nothing
8 |: z) a' k: `0 C0 Y" P, c2 }%>5 Q! s5 ^7 i6 m
<%
Z8 d5 Q/ u8 X& M. M9 N Set objStream = Server.CreateObject("ADODB.Stream")8 w8 a( G1 C: w9 q! W% [% \
objStream.Open
, p3 y4 X7 r1 \( f! M3 \$ Y objStream.Type = 1& \% p9 m$ y8 T
objStream.LoadFromFile url : b/ a5 k- }0 O9 @& R$ M! X. y
( u. p$ R( O# c& p6 C! | Select Case lcase(Right(flName, 4)): \' y3 H+ M: I* Z& L0 T* f
Case ".asf"
~# X" m" x4 F) l8 C ContentType = "video/x-ms-asf"+ |1 C! C$ p: M$ M" u, n( T% e
Case ".avi"
9 I' p4 K2 `" _7 ~5 V ContentType = "video/avi"
% v) d9 J5 T* _- } Case ".doc"
* r" ]) ? J# r6 J1 S7 ` ContentType = "application/msword"
( o3 v. L9 V0 u# I8 u3 h! m2 R" M Case ".zip"
4 N) _& T+ o. \9 ?/ w. f& v ContentType = "application/zip"
2 t. P9 s s: J+ J Case ".xls"
$ r9 t7 X! ]9 }: y ContentType = "application/vnd.ms-excel"( ^* B: A7 D+ c3 ?1 f( `
Case ".gif"% B: E! t# O0 A' ?4 h1 P
ContentType = "image/gif"
* j- L, ]! ~: \; H: W3 [ f Case ".jpg", "jpeg"5 v0 V( G+ v9 o1 e: {
ContentType = "image/jpeg"
! x" X z* C B- l# M0 O Case ".wav"3 m6 e% g2 t2 y$ v5 A
ContentType = "audio/wav"
" ^: j5 F. R. g Case ".mp3"" M" Z K- K1 q
ContentType = "audio/mpeg3"
0 _9 x" r* l* w, x" V* K Case ".mpg", "mpeg"
: ?9 x9 j. K' w& @ ContentType = "video/mpeg" ]# N9 m6 c0 ]2 x
Case ".rtf"- ?: ~0 f8 X, L% Y0 i5 z
ContentType = "application/rtf"
, I9 ?7 }5 h- l" ~: M# j6 d, T Case ".htm", "html"
5 v/ o& e+ X+ g: m5 j ContentType = "text/html"
+ u! e$ e! m: X# P4 H% ~ Case ".txt"7 L& `" l' Q+ x$ p. X
ContentType = "text/plain" j' s( ]. k; x! g! e, L, S
Case Else* |% a2 ?7 i- T
ContentType = "application/octet-stream"& P6 R/ }2 K, I/ j. Z
End Select
* C+ a, l7 \6 w) O( C! d- t* v: y, y
Response.AddHeader "Content-Disposition", "attachment; filename=" & flName
; Z& p: z# v9 \ Response.AddHeader "Content-Length", flsize ! _" E# S P8 m
Response.Charset = "UTF-8"
, t$ ~+ W. D/ C" I8 y- C Response.ContentType = ContentType u6 t7 x! u+ W( q# D8 z
Response.BinaryWrite objStream.Read. Y" i0 [' X0 d- o! _! r
Response.Flush
* O N& D! D h" n; y/ b response.Clear()8 f- _$ w1 y& v/ C& x9 J% f- o( m
objStream.Close
* t- k' g" V2 \. y- O' t Set objStream = Nothing $ ?9 t5 B# N: o. h
%> : x2 _3 M# Q3 m: l; A- C
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!
1 }% ]+ M8 \7 P' h9 P( @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 / B* S5 W+ C' ^# L9 a, D0 }5 M
在这个程序的最前面如果加上一个判断: " t1 J! [. o# Q. x
if instr(Request.ServerVariables("HTTP_REFERER"),"http://你的_blank>域名")=0 then
; Y, D5 G9 I$ B5 a% J% ?' i, e Response.End
' Q7 S9 C" W' c% r5 ` T" Yend if
0 |. Y) B7 ]1 d! w2 m$ Z+ r2 o就能够很好的防止别人的盗链了 |