ASP网页的动态下载软件技术,是如何实现的?象cdown 和51crack.net 一样?

[郝人（好人）]

同上.

[ChinaOk]

何谓动态下载软件技术？

[julyclyde]

该不会是说Windows Update那样的吧？

[郝人（好人）]

就是不让用户知道下载的实际地址在哪里,防止盗版链接,这个不懂吗? 可是这是怎么实现的呢?

[julyclyde]

ADODB.STREAM

[y1g1y1]

response.binarywrite

[ChinaOk]

download.asp?file=相对路径的文件
就可以把这个文件下载下来

<%
2
3 call downloadFile(replace(replace(Request("file"),"\",""),"/",""))
4
5 Function downloadFile(strFile)
6 ' make sure you are on the latest MDAC version for this to work
7 ' -------------------------------------------------------------
8
9
10 ' get full path of specified file
11 strFilename = server.MapPath(strFile)
12
13
14 ' clear the buffer
15 Response.Buffer = True
16 Response.Clear
17
18 ' create stream
19 Set s = Server.CreateObject("ADODB.Stream")
20 s.Open
21
22 ' Set as binary
23 s.Type = 1
24
25 ' load in the file
26 on error resume next
27
28
29 ' check the file exists
30 Set fso = Server.CreateObject("Scripting.FileSystemObject")
31 if not fso.FileExists(strFilename) then
32 Response.Write("<h1>Error:</h1>" & strFilename & " does not exist<p>")
33 Response.End
34 end if
35
36
37 ' get length of file
38 Set f = fso.GetFile(strFilename)
39 intFilelength = f.size
40
41
42 s.LoadFromFile(strFilename)
43 if err then
44 Response.Write("<h1>Error: </h1>" & err.Description & "<p>")
45 Response.End
46 end if
47
48 ' send the headers to the users browser
49 Response.AddHeader "Content-Disposition", "attachment; filename=" & f.name
50 Response.AddHeader "Content-Length", intFilelength
51 Response.CharSet = "UTF-8"
52 Response.ContentType = "application/octet-stream"
53
54 ' output the file to the browser
55 Response.BinaryWrite s.Read
56 Response.Flush
57
58
59 ' tidy up
60 s.Close
61 Set s = Nothing
62
63
64 End Function
65
66 %>

[郝人（好人）]

自己做服务器是没有问题的。只是还不太明白动态下载文件技术的实现。

[julyclyde]

不是说“你有服务器就可以”而是“你要自己编写服务器”你有那水平吗？你懂HTTP协议吗？

[可爱的排骨]

要防止盗链只能像myetang的服务器那样

[julyclyde]

那需要自己做服务器。你会吗？