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- 2020-4-28
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1)利用xmlhttp方式
/ v, `6 | U: h" h2 d- K2)无组件
' \ w) N) S, v0 M0 B1 E( M; l2 x) U% N3)异步方式获取,节省服务器资源( z t: P( B1 [$ u a; X8 |2 q! C
4)服务器到服务器的文件传送。(当然,你自己电脑上的IIS也是http服务器); C4 R: ? Z1 S4 I6 U
5)支持断点续传' e' ~! u1 a5 K) a* s# H! n9 r
6)分段下载
0 ~' w/ K, u2 K- i% A( }/ x6 A$ X+ w7)使用缓冲区,提升下载速度$ P" g+ `& u6 w4 g/ Y9 `" \. ]0 O
8)支持大文件下载(速度我就不说了,你可以测,用事实说话)
% E% V! ]# G& D' t6 {/ e2 ?, g, p0 j9)带进度条:下载百分比、下载量、即时下载速度、平均下载速度
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$ Z) J5 ]+ B, Y3 S" C7 U<%@LANGUAGE="VBSCRIPT" CODEPAGE="936"%>
- `9 Q% U$ A% Z3 M1 Y% V a ^<%Option Explicit%>
3 w9 S: P& s+ Z# Q. {% E5 H y$ Z/ O; T, Z) [6 U
<%
8 k5 A# Y6 s& {" U'================================================================0 K& `) F3 E! e) r3 _% T' k
'
: t! b6 `" t! h" @+ p4 E' 带进度条的ASP无组件断点续传下载1 t. c) E8 y# R% ^( A+ Y0 \5 w
'
" W3 q% Q4 F, b0 P'================================================================
3 q) E' B/ a9 ]$ `3 F+ v+ |1 O0 h# f2 v/ g'简介:6 G/ w, d5 n; a+ R3 G, n
' 1)利用xmlhttp方式. Y) s, v+ [6 U( M
' 2)无组件
0 _* h7 d' Q$ A; l; k' 3)异步方式获取,节省服务器资源! C k1 @/ e/ V' ~/ {5 w9 K( u
' 4)服务器到服务器的文件传送。(当然,你自己电脑上的IIS也是http服务器)
) t' s1 N' o w9 ^1 c5 E7 m7 x5 `' 5)支持断点续传
$ i5 G0 f. B* _% E8 }0 N _' 6)分段下载
+ ~& e8 `/ E2 s8 M3 Y' 7)使用缓冲区,提升下载速度. I* n* d3 ?' h/ l* w
' 8)支持大文件下载(速度我就不说了,你可以测,用事实说话)
3 X# M7 R% C9 w) O1 Q, J; ]3 s! L5 {' 9)带进度条:下载百分比、下载量、即时下载速度、平均下载速度
8 ^2 c) o0 B0 M" P/ `') t- _7 I% G# E
'用法:
3 p4 K) r; x" E' D4 {7 ?' 设置好下面的三个变量,RemoteFileUrl、LocalFileUrl、RefererUrl% E5 R* G# z$ }+ Y
'8 U- X" q" W% \3 E/ o) E7 p
'作者:午夜狂龙(Madpolice)
( Q8 L9 x+ U S& e6 b8 Y) x# {'madpolice_dong@163.com
} K1 C. T( F& @: A; k6 \'2005.12.25
7 ^$ H6 Z3 M V'================================================================( t0 y9 v' _% K7 N- _. k
%>
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9 H9 S6 v$ }8 E$ B; q* {7 }. f0 _/ g5 n0 _
<%'-----------------------------以下为设置部分--------------------------------%>
# x# h$ C( t6 G. v<%Server.Scripttimeout = 24 * 60 * 60 '脚本超时设置,这里设为24小时%>9 B, j9 G1 d* }: n: U7 y) D( U X' v
<%- Q* W9 E, g/ H5 {/ e. {3 H! T, l
Dim RemoteFileUrl '远程文件路径% z4 i7 L% ]/ @2 K8 Z* O
Dim LocalFileUrl '本地文件路径,相对路径,可以包含/及..
1 J$ S2 ~7 A2 C6 Y8 e' v
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RemoteFileUrl = "http://ftp.chinalinuxpub.com/redhat/ISO/4AS/RHEL4-i386-AS-disc1.iso"; V( U9 T" d1 H1 [3 [
LocalFileUrl = "RHEL4-i386-AS-disc1.iso"
2 j! u4 u! d+ e% v# h5 M8 cDim RefererUrl
! K7 ~& D4 G7 v/ u) U4 `5 ~'该属性设置文件下载的引用页,
8 m) a1 e8 |. B; {. g; F8 x'某些网站只允许通过他们网站内的连接下载文件,
* a- h7 _1 e4 y'这些网站的服务器判断用户是否是在他们网站内点击的文件链接就是靠这个属性。; K& S" ~% Q% v) \- J
RefererUrl = "http://ftp.chinalinuxpub.com/redhat/ISO/4AS/RHEL4-i386-AS-disc1.iso" '若远程服务器未限制,可留空
7 |/ B4 \+ t: g$ FDim BlockSize '分段下载的块大小
: y! B& ?7 W+ S6 ADim BlockTimeout '下载块的超时时间(秒)
5 S2 f7 E$ A% `* e) m+ S3 [& l# L6 b4 Y' i9 _
4 Q& Q( l, ?" w/ T0 S9 n+ { f
BlockSize = 128 * 1024 '128K,按1M带宽计算的每秒下载量(可根据自己的带宽设置,带宽除以8),建议不要设的太小
4 z* G) @6 T2 [1 A( y( M8 F8 uBlockTimeout = 64 '应当根据块的大小来设置。这里设为64秒。如果128K的数据64秒还下载不完(按每秒2K保守估算),则超时。4 T. s9 u4 ?+ ?8 `) v# s( _
! i8 g9 ]) ~& u/ i
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Dim PercentTableWidth '进度条总宽度
$ ^3 z* k2 m. y7 z& {
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PercentTableWidth = 560
) f! r" e4 F' L' Y1 {%>* U/ `% Y- h1 T/ P; C. z
<%'-----------------------------以上为设置部分--------------------------------%>) B/ W/ P" g% p+ z, {% l4 a7 v
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<%( j$ L4 L3 r2 H- q9 D
'***********************************************************************
# J1 F' K( f- g1 ?3 b' !!!以下内容无须修改!!!
6 x8 n2 _- C) B. {6 ?'***********************************************************************
$ L7 S9 v! A6 }* z& p; ? u- i o' d" r%>
/ ~3 r) v6 S* F: _8 x<%" K. Z r3 v0 e* U0 z8 @
Dim LocalFileFullPhysicalPath '本地文件在硬盘上的绝对路径3 r( Z9 H \" k/ }9 l/ B
7 z1 ~: _6 q$ J( ?) H3 a2 |# {
LocalFileFullPhysicalPath = Server.Mappath(LocalFileUrl); a/ n; x/ z- L. B; F j g/ j
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<%: V; w( m1 k" e' E0 O
Dim http,ados
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5 l1 j4 E `8 G5 E% C1 h$ \
+ s- K$ }, V4 Z5 }. Y" hOn Error Resume Next) x+ J0 ?" w1 u, U* R
Set http = Server.CreateObject("Msxml2.ServerXMLHTTP.7.0")' R3 {" G9 w5 x5 t- T
If Err Then
" i/ x" B3 S# U- @0 n6 o$ h Err.Clear
8 U: [) X- a% l
0 i7 }+ S1 M {& s1 K! ^8 T! U1 p* ^+ Y6 W$ p1 \
Set http = Server.CreateObject("Msxml2.ServerXMLHTTP.6.0"); w+ n4 L' P( e( |( @" o, k, N
If Err Then
1 }( ~2 I, _. B+ R# ^& r2 c; Y Err.Clear9 L, H' l+ g1 c. r' y0 X& z0 u
; Z* R3 ~- g6 f! ^" f' F
9 K5 Q& r; |- H9 J/ R# [! L m Set http = Server.CreateObject("Msxml2.ServerXMLHTTP.5.0")
( F& @2 d" _+ X. u$ r If Err Then( O/ o2 p; g# O2 k$ \5 `% q; T
Err.Clear
7 ^; r% F% L# ~7 M$ A% T9 x6 A5 U8 C$ o4 g& F. b0 d
9 R! C; O P C X y
Set http = Server.CreateObject("Msxml2.ServerXMLHTTP.3.0")( Y Y: P4 _ c( }3 r- |
If Err Then g4 s# w+ q" V) e
Err.Clear' W. {; N6 L& k6 r) y# k2 F6 m4 X: i: X) R
5 t ^# {) z/ g: H8 t. b, O
& m+ B7 ^ s. `# ~* w Set http = Server.CreateObject("Msxml2.ServerXMLHTTP")
$ [, h, a9 \. Z3 L7 q If Err Then
) c& s5 x: m: e1 w" V. s# m' @ Err.Clear
. E9 A! Z+ e6 z7 b% E Response.Write "服务器不支持Msxml,本程序无法运行!"
5 P3 I/ M0 L* t( ?+ A, s. M3 L' W Response.End
( y. s0 U9 j6 A- s9 x7 a* v7 R. k End If
8 p. `+ t! J" V4 A6 [+ g End If
8 c1 M& |; x# B, | End If
0 i* }* l) p9 R( @# F b End If! s$ u' F" H0 }5 f; P
End If1 E$ l1 w# Z2 d
On Error Goto 0, r, [" |; t0 G/ g. C# s
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Set ados = Server.CreateObject("Adodb.Stream")
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, w' f" }$ F' P& P<%
- q) b$ \1 \, p# iDim RangeStart '分段下载的开始位置4 Q4 w6 y1 a8 X9 O- a3 O! H
Dim fso! _4 d/ x- d# i: X2 Z3 g
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Set fso = Server.CreateObject("Scripting.FileSystemObject")% N: A8 x' C3 v* R% f: P' t% H' o
If fso.FileExists(LocalFileFullPhysicalPath) Then '判断要下载的文件是否已经存在
: ?' o+ T, @7 M$ ] RangeStart = fso.GetFile(LocalFileFullPhysicalPath).Size '若存在,以当前文件大小作为开始位置
1 k1 Q/ c2 w* x* R2 ?2 @Else3 e! _$ y0 D* [+ D
RangeStart = 0 '若不存在,一切从零开始5 a3 E2 @$ C% W' m; S% u! U
fso.CreateTextFile(LocalFileFullPhysicalPath).Close '新建文件% j6 Q. ^, {, @( q
End If
" u/ k4 e( Y' q% aSet fso = Nothing
7 u& G$ t4 a5 ]& U; G%>$ Q( c2 r6 I! M ^# V/ A! }
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<%
( B8 G( D) j7 I+ HDim FileDownStart '本次下载的开始位置- W: g# }! b7 K4 c$ ~8 L
Dim FileDownEnd '本次下载的结束位置" K7 d' W& C2 Z% W
Dim FileDownBytes '本次下载的字节数3 {! I2 E' l3 n: u. U
Dim DownStartTime '开始下载时间# T; S+ k& d! Z. |) `8 q: R
Dim DownEndTime '完成下载时间, o6 ]4 `+ s2 }2 Q+ n k
Dim DownAvgSpeed '平均下载速度
, u# n# E& H; u: A3 e U$ A+ {# \9 o* |+ ~
. K1 e. o9 @# `5 y+ K5 x
Dim BlockStartTime '块开始下载时间5 C7 b3 q p/ `: N! _
Dim BlockEndTime '块完成下载时间7 |( g1 C# l5 @1 a* U
Dim BlockAvgSpeed '块平均下载速度
8 `8 I8 z3 j. P" U
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Dim percentWidth '进度条的宽度* f+ V6 ~, a: e! L/ q" [% u
Dim DownPercent '已下载的百分比5 {: y, n5 s# ~
4 a# x# W% d" j. u
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FileDownStart = RangeStart
. \, R8 [3 |; x3 F%>
5 H3 }% t+ y. J9 Q
# B1 ]( S/ Q4 P3 ]6 h9 H( y6 ]# W
<%" x/ \! J% \$ G7 G
Dim adosCache '数据缓冲区 O6 Z5 f5 `7 z& w4 \
Dim adosCacheSize '缓冲区大小
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# ^7 m. Q- r, l1 Z8 G: uSet adosCache = Server.CreateObject("Adodb.Stream")) `3 b& V% l g3 F( P4 J& [: Y
adosCache.Type = 1 '数据流类型设为字节
( S- j' j ]0 I4 o7 WadosCache.Mode = 3 '数据流访问模式设为读写- V9 P# i9 S0 c- ^' I' X/ v3 Z( x* N
adosCache.Open
$ w0 ]9 X# L1 S) [' P- b# dadosCacheSize = 4 * 1024 * 1024 '设为4M,获取的数据先放到(内存)缓冲区中,当缓冲区满的时候数据写入磁盘
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7 T7 G1 U- f( y7 I* O6 M, E, C! n9 g" M'若在自己的电脑上运行本程序,当下载百兆以上级别的大文件的时候,可设置大的缓冲区. J, q0 u7 v! p# F6 a# j( [+ f
'当然,也不要设的太大,免得发生(按下浏览器上的停止按钮或断电等)意外情况导致缓冲区中的数据没有存盘,那缓冲区中的数据就白下载了8 X, A4 Q+ J) H1 S, ^) x
%>
$ L* ?) B+ @0 {5 I- O' r" _7 k9 e, c7 d1 F# R) E
0 O' I* O- O+ P<%2 X( H, |6 F' J! I7 F8 S
'先显示html头部
5 }- u0 O+ g5 {( QResponse.Clear& J/ S" z' s v+ D2 ^3 R& A
Call HtmlHead()
5 }: z. \0 r! [* |1 z% ]- UResponse.Flush
: x' S' y; m& S+ X; C%>
C" u1 B1 @; K+ a) m$ A) Z/ v& z) R; A2 @
+ T2 g$ C% w% N0 F<%
' G0 q; f- _9 @7 `- s8 vDim ResponseRange '服务器返回的http头中的"Content-Range": G* B! G+ T* Q& V# {2 e! |7 O& q
Dim CurrentLastBytes '当前下载的结束位置(即ResponseRange中的上限)
( Y* T3 P) i+ S4 S$ p" wDim TotalBytes '文件总字节数
& B, l3 n" t4 x5 a& T) @Dim temp
9 ]" y! S+ a: }& t1 ~! C) }$ f
$ Z5 c' A' M0 C
! ?; R/ }# ^9 ?$ x'分段下载5 ?9 V# j0 E- v9 a
DownStartTime = Now()/ ?3 Q5 _; d, f/ k2 J6 U: ]
" L) |( r. w$ t1 ~0 _# s# p# ]% g+ f, X
Do
) }3 y/ e" t( r* [' c BlockStartTime = Timer(), u* B) ~9 k( o) d2 b9 ~" y8 L7 o
$ C5 |! i( v _ A0 x1 X& z
8 A8 W0 [ W( b% v5 M http.open "GET",RemoteFileUrl,true,"","" '用异步方式调用serverxmlhttp3 R1 e1 C1 b7 O* N/ I$ E
8 B- a8 V/ M% ~; r8 A
. @$ K9 d# w8 G8 U '构造http头* G. ~% ]& y4 i
http.setRequestHeader "Referer",RefererUrl
$ u% \2 O& W2 r+ x1 i; C( Q; J4 n http.setRequestHeader "Accept","*/*"& z% d6 c0 @0 Y! g; i
http.setRequestHeader "User-Agent","Baiduspider+(+http://www.baidu.com/search/spider.htm)" '伪装成Baidu5 E9 n+ G. m A9 W3 x
'http.setRequestHeader "User-Agent","Googlebot/2.1 (+http://www.google.com/bot.html)" '伪装成Google. {: X& g9 u( ]" R9 P) l. f2 p* q
http.setRequestHeader "Range","bytes=" & RangeStart & "-" & Cstr(RangeStart + BlockSize - 1) '分段关键6 z# j" P( \8 S" n4 M( v+ Y
http.setRequestHeader "Content-Type","application/octet-stream"
n& S1 P. ?4 s5 J# F2 E http.setRequestHeader "Pragma","no-cache"3 a, c; o* U) S- e% l% j
http.setRequestHeader "Cache-Control","no-cache"
$ p* _/ i" B/ {8 U4 a$ x1 `
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1 D& C3 y9 J% ?& k( d- J+ W http.send '发送
3 g/ D# X. e' E' C; \+ n! J/ }7 e. W" s+ W0 b
' {) o4 ^7 L+ x/ q '循环等待数据接收7 `- K- Z2 H, m+ c/ U v2 [
While (http.readyState <> 4)
3 S+ ~5 a9 }( ]: P6 j- c1 [ '判断是否块超时
% y& A7 r% T9 {. z: i4 z temp = Timer() - BlockStartTime$ I- L* L" F1 Q( `
If (temp > BlockTimeout) Then
& Y0 ~* C2 ]8 S http.abort' c; g& T6 U' x
Response.Write "<script>document.getElementById(""status"").innerHTML=""<strong>错误:数据下载超时,建议重试。</strong>"";</script>" & vbNewLine & "</body></html>"
6 L4 g7 d9 T: h$ [ Call ErrHandler()# @5 K* e) M+ c& g* \( o& O1 C
Call CloseObject()
|6 w% g" x; L& n! L* t Response.End
) h0 C8 ]; m2 H( S0 Y7 H End If
. }( H! O& q7 k
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6 M7 C2 ?9 S) Z6 { O http.waitForResponse 1000 '等待1000毫秒
0 ]. K5 h! e7 D& m4 C Wend; b) g9 ?0 P3 f5 k% B' \4 f
# ?4 K; C- C8 d$ y
?5 V$ _7 o4 K0 {% O+ f; {7 k+ g( U '检测状态; ^' R! l0 U5 n) S3 Z( u
If http.status = 416 Then '服务器不能满足客户在请求中指定的Range头。应当是已下载完毕。
& K* e# Q3 w8 g FileDownEnd = FileDownStart '设置一下FileDownEnd,免得后面的FileDownBytes计算出错# g/ v9 J7 j; H" |& D7 d
Call CloseObject()
( w" f; P- V0 b) a Exit Do
: d! V# d# z3 @. K( ^! p End If5 }7 y% x& j$ p* ^; H1 R, T
+ [1 R4 t2 i# n0 X! \
7 ^! b" R& w; T `# n2 i: ] '检测状态' \% H1 P9 b1 R! P7 L& ~/ t
If http.status > 299 Then 'http出错# y! I& _9 S, U5 W6 m& K" j
Response.Write "<script>document.getElementById(""status"").innerHTML=""<strong>http错误:" & http.status & " " & http.statusText & "</strong>"";</script>" & vbNewLine & "</body></html>"
$ G) x: ~5 Q- V Call ErrHandler()
+ l9 W8 e; S9 b8 o# n- V Call CloseObject()
1 l/ m) n' U2 [8 D Response.End* p3 c0 q; ?+ W' N1 H7 O5 Z# P
End If
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4 `6 Y# b, P6 s: v, n W
0 g$ i; f3 f+ M! X '检测状态
8 [1 d; `+ N2 U4 Z' P! R If http.status <> 206 Then '服务器不支持断点续传
" x, g$ V) p- H4 `9 s Response.Write "<script>document.getElementById(""status"").innerHTML=""<strong>错误:服务器不支持断点续传!</strong>"";</script>" & vbNewLine & "</body></html>": o, ~3 W. |- ?& [/ U- |
Call ErrHandler()
: ~2 o" ~7 V( D3 w0 o; N Call CloseObject()
, j2 g" E7 ?2 X4 Y Response.End
- Q4 t$ M7 ^" x6 h End If
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- E, P! z. l$ Z
% {+ R: ~" ~, S; r/ Q' W '检测缓冲区是否已满, H+ q. n! F3 |" y) i8 Q+ p4 z
If adosCache.Size >= adosCacheSize Then
9 s9 d6 X2 X) w5 ?" M" ^ '打开磁盘上的文件% d+ M. G0 c9 h8 J4 p: R
ados.Type = 1 '数据流类型设为字节
2 L/ x c4 N. F+ m ados.Mode = 3 '数据流访问模式设为读写
i0 a9 w2 F6 p9 Q8 p3 U ados.Open
& Q) ?6 ~: V/ s1 Q* I* \5 {8 t2 i ados.LoadFromFile LocalFileFullPhysicalPath '打开文件2 P2 U- }1 R3 H6 U5 \
ados.Position = ados.Size '设置文件指针初始位置
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'将缓冲区数据写入磁盘文件
4 o: ^8 U/ J7 a9 k adosCache.Position = 03 |, z) G- m5 m* c; S5 B: a
ados.Write adosCache.Read
1 J4 f# S' R( S3 E ados.SaveToFile LocalFileFullPhysicalPath,2 '覆盖保存/ M8 |( P! p7 E& y4 T- o
ados.Close5 X X: P- S0 e- P6 T4 b) ]
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'缓冲区复位* C; T% F9 o/ r) V# v& A% x
adosCache.Position = 0
! Z4 Y; ^ f4 |& c, i adosCache.SetEOS5 g: x/ [: z: w' h! h( H
End If
# _/ `6 f& m0 G
% z& }- p0 l2 e '保存块数据到缓冲区中
9 A& n f0 [2 T! J8 _4 U adosCache.Write http.responseBody '写入数据5 y& ^# M; ?% u# v- y5 G% X
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( F* v4 T8 t; s( z0 h0 Z# r8 Y. A '判断是否全部(块)下载完毕
! z6 Z- N+ X' u* \, ~. b7 X ResponseRange = http.getResponseHeader("Content-Range") '获得http头中的"Content-Range"
; O; q; p2 m: c( A2 q, d. N1 W If ResponseRange = "" Then '没有它就不知道下载完了没有
, Y% b! e# O! x& D% Z7 d Q$ U8 a0 Z9 r Response.Write "<script>document.getElementById(""status"").innerHTML=""<strong>错误:文件长度未知!</strong>"";</script>" & vbNewLine & "</body></html>"
$ m2 e% C% ^( M$ H5 F! T0 | Call CloseObject()
g7 J4 _" e' u: x Response.End
8 A( w/ i: a: u: s End If" @: E$ D( b( T; E( z+ ]
temp = Mid(ResponseRange,Instr(ResponseRange,"-")+1) 'Content-Range是类似123-456/789的样子
8 O) Y' @& x7 T% i% o CurrentLastBytes = Clng(Left(temp,Instr(temp,"/")-1)) '123是开始位置,456是结束位置! ^& y+ E9 F# P- R
TotalBytes = Clng(Mid(temp,Instr(temp,"/")+1)) '789是文件总字节数
; t( e2 U# w" f* d+ W( i1 B, G @5 I If TotalBytes - CurrentLastBytes = 1 Then; n/ A! B; J3 v
FileDownEnd = TotalBytes
7 [( n+ |: T6 _; |4 q. W) U) x4 g
1 y$ p. j/ H1 U& p2 ]/ n/ O9 x. ]# y2 t7 Z/ V
'将缓冲区数据写入磁盘文件
! _7 g2 r$ T2 S/ X5 h. [1 G$ E ados.Type = 1 '数据流类型设为字节
9 C, _: c% ~) w! W ados.Mode = 3 '数据流访问模式设为读写
- \" @: q9 `0 {3 w$ M ados.Open
, ^7 \7 o% R' y4 I) V8 C ados.LoadFromFile LocalFileFullPhysicalPath '打开文件
& @+ b9 F0 M! M ados.Position = ados.Size '设置文件指针初始位置) j* E! v9 R& C4 J6 k) f2 d8 D; j' _
adosCache.Position = 0' B$ K" \2 v( ]; a6 D# _ g
ados.Write adosCache.Read1 }4 |6 g- @# y; V/ C/ Q
ados.SaveToFile LocalFileFullPhysicalPath,2 '覆盖保存
. @, ]4 J& x+ |: ] ados.Close) |$ }1 {; n. r' V) W& E5 j9 n1 @
% x$ p M3 `, d3 a z9 n7 b, P3 e; Y8 f
Response.Write "<script>document.getElementById(""downsize"").innerHTML=""" & TotalBytes & """;</script>" & vbNewLine/ c( {! i; o& M; R
Response.Flush. ?5 C G: r7 m/ B% n
Call CloseObject()3 l( M* t+ I# c w5 }8 k+ M
Exit Do '结束位置比总大小少1就表示传输完成了- Z9 ]% }' u) M3 W
End If' k0 o" q2 m, P: A
4 \4 N3 t; c7 G! l '调整块开始位置,准备下载下一个块
* X* ?! P0 B' Z& k* { RangeStart = RangeStart + BlockSize
: M+ ~% U4 S/ ]6 ]; M( ]2 W3 N; [6 L5 H, u j) a t' W! X& d
& B0 W: w0 H/ B" ], Z8 E
'计算块下载速度、进度条宽度、已下载的百分比
3 r! o9 w% v- k8 @) ~/ J BlockEndTime = Timer()
2 s* h7 Y8 Y' A+ S& X1 H- R) f, S temp = (BlockEndTime - BlockStartTime)8 t- |3 O& Y5 U! x3 S
If temp > 0 Then
! r& Q- t( e8 B I BlockAvgSpeed = Int(BlockSize / 1024 / temp)
5 x( a" [% }3 C) o! O9 b$ b' P2 g5 @ Else( b; Q* F. F; `$ }' ?3 V% e$ s1 A0 a
BlockAvgSpeed = ""
( N7 k4 o4 M Q0 Y+ r End If7 V/ W z5 q! l0 Q0 n! \
percentWidth = Int(PercentTableWidth * RangeStart / TotalBytes)
: ]& ?6 D- S9 L2 r5 T! R' S6 E DownPercent = Int(100 * RangeStart / TotalBytes)6 i- N) y( T k8 K* E4 g. Q h3 {# Z8 u
4 ]4 c& g% d3 k- _3 T5 [4 G
6 ], q% g* R- k5 W$ D
'更新进度条& U) P$ n8 j0 J, l* B; l" U
Response.Write "<script>document.getElementById(""downpercent"").innerHTML=""" & DownPercent & "%"";document.getElementById(""downsize"").innerHTML=""" & RangeStart & """;document.getElementById(""totalbytes"").innerHTML=""" & TotalBytes & """;document.getElementById(""blockavgspeed"").innerHTML=""" & BlockAvgSpeed & """;document.getElementById(""percentdone"").style.width=""" & percentWidth & """;</script>" & vbNewLine
( D# H+ N* n6 K1 Y+ ~, x, g6 w Response.Flush4 ]$ b+ p9 v* U {
Loop While Response.IsClientConnected) R) e$ g# i# o7 o9 d4 L5 p
, z8 w9 z% {; q/ u1 z
. v: e, c0 e8 _3 ~) s) w9 }If Not Response.IsClientConnected Then
7 Z: C& ^2 E, D7 [ Response.End6 l/ B* G# D1 f3 r8 g" n
End If
. R2 ~# [4 K8 K9 b* D8 x8 i" m$ u P5 K; ^5 n
0 T+ u5 I2 A+ ~1 G* o! P
DownEndTime = Now()* H( r8 P3 P `
FileDownBytes = FileDownEnd - FileDownStart
0 w7 Z3 j$ V. T" ? m- `# \+ O/ n& w; ztemp = DateDiff("s",DownStartTime,DownEndTime)5 Q# n5 u l! h- r; M
If (FileDownBytes <> 0) And (temp <> 0) Then, S: ^) s A D' `: t
DownAvgSpeed = Int((FileDownBytes / 1024) / temp)4 I/ Y( p% U. t" A9 A: f
Else3 g, Z Z# M8 m, r7 U
DownAvgSpeed = ""
2 r& e- d! _5 O8 U; W: zEnd If
0 Q1 o6 m; N- e" h
. I8 o/ t5 Y9 a3 Z- W
( A7 U6 h! o' S! ]'全部下载完毕后更新进度条4 a/ R$ O* }# o/ S# x' F) d6 @
Response.Write "<script>document.getElementById(""downpercent"").innerHTML=""100%"";document.getElementById(""percentdone"").style.width=""" & PercentTableWidth & """; document.getElementById(""percent"").style.display=""none"";document.getElementById (""status"").innerHTML=""<strong>下载完毕!用时:" & S2T(DateDiff("s",DownStartTime,DownEndTime)) & ",平均下载速度:" & DownAvgSpeed & "K/秒</strong>"";</script>" & vbNewLine
' @3 X4 X+ E. e5 f, V%>
' W! p0 e, k# J- p9 a+ T; j* c4 Q' a/ I I3 u# Z7 A
1 X% C1 ?5 H2 `5 ?1 X
</body>
8 N# w* v" \4 ^* O# G2 P& \8 D( J( A</html>
7 @4 r2 V6 l' l- B1 @, M" z9 s: I- m$ F# `/ Z) f0 E
. y. I. W2 j- @/ y
<%
: Z0 b. a. B8 w1 Y; ?Sub CloseObject()- j9 P% U. U6 e" }
Set ados = Nothing
1 E; y5 X1 L0 y: J% p6 U5 m Set http = Nothing
+ @1 I6 r& @9 c+ s( E7 I7 l. N* ~ adosCache.Close7 m1 t* {) z$ \! P- @
Set adosCache = Nothing" C' z! }/ V+ [4 y# g) g, Y& p( I
End Sub. z; Y$ ?; o- q3 x) F4 X2 l
%>
9 q2 B7 v+ i* e* o# ?/ T5 j7 |3 y- H9 V- ~! b1 K/ o3 I9 L K
5 o6 k1 Y g$ Q) S, ` C
<%
# a/ W; t& c& |. l5 U'http异常退出处理代码7 j2 {1 c4 q6 w7 O
Sub ErrHandler()& ~8 T0 O* Y0 K( S! w
Dim fso
# _- T, h% s% Z i/ {1 C
) g7 v' m! P. D8 E( X8 d S5 o' S$ s( c& G+ {
Set fso = Server.CreateObject("Scripting.FileSystemObject")4 k+ G# a8 f3 W" s' C4 G2 I
If fso.FileExists(LocalFileFullPhysicalPath) Then '判断要下载的文件是否已经存在6 [5 @1 h! t& d& f
If fso.GetFile(LocalFileFullPhysicalPath).Size = 0 Then '若文件大小为0- F. v7 G' {4 u; }+ I5 y* Y
fso.DeleteFile LocalFileFullPhysicalPath '删除文件
! R9 E- q% r, k2 m# w( y+ e End If1 L* C/ _7 C) i0 m5 S$ q
End If
) `" ]5 }% X4 Q5 I# }: R& `" i- Z \ Set fso = Nothing
. l5 H2 O/ q' x* n3 X6 m$ _* K" dEnd Sub( J& ^ j1 k$ J% l
%>
+ l7 X7 ^3 M4 C
8 X' h8 w. s+ i7 C" [3 O; y
/ H5 y! Z/ a) ]<%Sub HtmlHead()%>
4 O, a1 u! x; Y. R0 i" m<html>
( U, C& Y8 k% J" b) ^2 P<head>$ W4 e- @# ~& b2 `$ G# e1 ]) L
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">* H' T8 B# f+ Q+ q% v* `9 C" P% y
<title>带进度条的ASP无组件断点续传下载----作者:午夜狂龙(Madpolice)--2005.12.25</title>
, [! f) ?' {; b6 R5 U" i, J; l+ ~! ^! ?9 X3 ?</head>$ c) ?) c9 d9 h4 F* ?
<body>
8 K' @+ ^2 `; K+ H' a1 e2 @<div id="status">正在下载 <span style="color:blue"><%=RemoteFileUrl%></span> ,请稍候...</div>/ ~( O# Q( |( N0 H9 b" z( C% m; y
<div> </div>) b$ K) u( i( Q0 k/ i/ J
<div id="progress">已完成:<span id="downpercent" style="color:green"></span> <span id="downsize" style="color:red"><%=RangeStart%></span> / <span id="totalbytes" style="color:blue"></span> 字节(<span id="blockavgspeed"></span>K/秒)</div>
, R; {: _% D, _+ Q9 u. C# G& b<div> </div>
$ e3 Z" Y r2 B<div id="percent" align="center" style="display:''">
8 @- F# A2 c5 z4 k: d- _# c% ` <table style="border-collapse:collapse;" border="1" bordercolor="#666666" cellpadding="0" cellspacing="0" width="<%=PercentTableWidth%>" align="center" bgcolor="#eeeeee">
4 O2 ?' p& O# s# b' ] <tr height="20">. }0 @ L6 `8 ?9 B- ~7 ~" l
<td>
+ C: @) b0 Y8 h8 g- L) S( H- P <table border="0" width="" cellspacing="1" bgcolor="#0033FF" id="percentdone">1 f) x: h/ b- H6 F7 Q
<tr>
; K5 W: N+ N* t6 {$ M <td> <td>4 ^0 L6 c2 A% Y4 m9 [! C
</tr>7 ?+ Y6 z) k' @6 K
</table> J) Q1 T8 p# e& R+ ]/ z
</td>( I1 h' R. I& p* g( d3 M: ]
</tr>! @) k: }5 Q/ L; K2 r6 N
</table>2 E" V8 J0 x+ P7 t8 R- ]
</div>
; v6 _# Z0 B# b9 S<%End Sub%>- K* D( y+ b, z9 L5 R0 R
/ @$ ?! d: ]! }3 L
' q. t. m* [$ ~
<%, U$ v Y, E4 A% ]0 T6 @
'--------------------------------------------------------------------
% ^1 ~- Y; k1 r! ]'将秒数转换为"x小时y分钟z秒"形式, W* @( [9 k V0 @: Q/ \; L8 R" Y
'--------------------------------------------------------------------
- H& G8 P$ F/ r+ zFunction S2T(ByVal s)
/ _; F) K2 [3 G- T# Y Dim x,y,z,t/ v% r! L" b8 q8 @$ ^
If s < 1 Then
/ a4 m( [9 n9 K* B' q, K S2T = (s * 1000) & "毫秒"
/ |; p: Z4 I; w0 t9 P5 q7 I0 d Else
# U" c4 v& Z _+ _' {) P* V s = Int(s)
* m( d3 v' Q! D) J x = Int(s / 3600)7 T0 p+ q2 o2 y% ?. H
t = s - 3600 * x
, I9 H$ {0 z. k; V y = Int(t / 60)
/ @7 X0 j1 u& E( ~# c8 j( n# ]: p z = t - 60 * y
1 h4 ^% R, I5 f7 v# \ If x > 0 Then
1 C% j5 p0 G' i: L/ i S2T = x & "小时" & y & "分" & z & "秒"+ [7 d( W+ m/ f1 T- B) p! Y
Else
) P5 k, S$ J+ ] If y > 0 Then
O1 e* E# i+ s8 m6 H S2T = y & "分" & z & "秒"$ N, t& J' E4 f0 h, m' l- ~
Else9 J c+ U- x0 L4 ~- f0 | {
S2T = z & "秒"
0 F. w( u: s. N- Y2 \: d1 E- g End If3 w8 `+ I* u) m7 S: e
End If
9 t( a( E& P) S( o+ x) y End If
% T9 s. u& T' G8 P8 SEnd Function/ T6 u! T t8 f9 Y' _) G1 H& ~
'--------------------------------------------------------------------
" p8 t2 t& F7 n. b%> |
|