ASP implements hidden download address and anti -theft

<% FunctIon DownloadFIle(StrFIle)

StrFIlename=StrFIle

Response.Buffer=True

Response.Clear

Set S=Server.CreateObJect(ADODB.Stream)

S.Open

S.Type=1

on Error Resume Next

Set Fso=Server.CreateObJect(ScrIptIng.FIleSystemObJect)

If Not Fso.FIleExists(StrFIleName) Then

From_Url=Cstr(Request.ServerVarIables(HTTP_REFERER))

Serv_Url=Cstr(Request.ServerVarIables(SERVER_NAME))

If MId(From_Url,8,len(Serv_Url)) <> Serv_Url Then

Response.WrIte 该文件不存在或者已经删除.

Response.End

End If

Response.RedIrect Request.ServerVarIables(HTTP_REFERER)

Response.End

End If

FileExt=MId(StrFIlename,InStrRev(StrFIleName, .)+1)

Select Case UCase(FIleExt)

Case ASP, ASA, ASPX, ASAX, MDB, PHP, JSP, SHTML, HTML, HTM, TV, DATA

From_Url=Cstr(Request.ServerVarIables(HTTP_REFERER))

Serv_Url=Cstr(Request.ServerVarIables(SERVER_NAME))

If MId(From_Url,8,len(Serv_Url)) <> Serv_Url Then

Response.WrIte 该文件不存在或者已经删除.

Response.End

End If

Response.RedIrect Request.ServerVarIables(HTTP_REFERER)

Response.End

End Select

Set F=Fso.GetFIle(StrFIlename)

IntFIlelength=F.SIze

s.LoadFromFIle(StrFIlename)

If Err Then

From_Url=Cstr(Request.ServerVarIables(HTTP_REFERER))

Serv_Url=Cstr(Request.ServerVarIables(SERVER_NAME))

If MId(From_Url,8,len(Serv_Url)) <> Serv_Url Then

Response.WrIte 该文件数据不完整或许已损坏.

Response.End

End If

Response.RedIrect Request.ServerVarIables(HTTP_REFERER)

Response.End

End If

Set Upload=Server.CreateObJect(PersIts.Upload)

If Upload Is Nothing Then

Response.AddHeader Content-DIsposItIon,attachment; FIlename=&F.Name

Response.AddHeader Content-Length,IntFilelength

Response.CharSet=UTF-8

Response.ContentType=application/x-download

Response.BinaryWrite S.Read

Response.Flush

S.Close

Set s=NothIng

Else

Upload.SendBinary StrFIlename,True,application/x-download,False

End If

End FunctIon

%>