ASP中设计和使用类1

'-----------------------------------------------------
' 描述: Asp打包类
' 作者: 小灰([e-mail])
' 链接: http://asp2004.net http://blog.csdn.net/iuhxq http://bbs.asp2004.net
' 版本: 1.0 Beta
' 版权: 本作品可免费使用，但是请勿移除版权信息
'-----------------------------------------------------
Class Rar
Dim files,packname,s,s1,s2,rootpath,fso,f,buf
Private Sub Class_Initialize
Randomize
Dim ranNum
ranNum = Int(90000 * Rnd) + 10000
packname = Year(Now)&Month(Now)&Day(Now)&Hour(Now)&Minute(Now)&Second(Now)&ranNum&".asp2004"

rootpath = Server.MapPath("./")

Set files = server.CreateObject("Scripting.Dictionary")
Set fso = Server.CreateObject("Scripting.FileSystemObject")

Set s = server.CreateObject("ADODB.Stream"):s.Open:s.Type = 1
Set s1 = server.CreateObject("ADODB.Stream"):s1.Open:s1.Type = 1
Set s2 = server.CreateObject("ADODB.Stream"):s2.Open:s2.Type = 2
End Sub

Private Sub Class_Terminate
s.Close:Set s = Nothing
s1.Close:Set s1 = Nothing
s2.Close:Set s2 = Nothing

Set fso = Nothing
End Sub

Public Sub Add(obj)
If fso.FileExists(obj) Then
Set f = fso.GetFile(obj)
files.Add obj,f.Size
ElseIf fso.FolderExists(obj) Then
files.Add obj,-1
Set f = fso.GetFolder(obj)
Set fc = f.Files
For Each f1 in fc
Add(LCase(f1.Path))
Next
End If
End Sub

Public Sub Pack
Dim str
a = files.Keys
b = files.Items
for i=0 to files.count-1
If b(i)>=0 Then
s.LoadFromFile(a(i))
buf = s.Read
If Not IsNull(buf) Then s1.Write(buf)
End If
str = str & b(i)&">"&Replace(a(i),rootpath,"")&vbCrLf
next
str = CStr(Right("000000000"&len(str),10)) & str
buf = TextToStream(str)
s.Position = 0
s.Write buf
s1.Position = 0
s.Write s1.Read
s.SetEOS
s.SaveToFile(packname)
End Sub

Public Sub UnPack

If Not fso.FolderExists(rootpath) Then
fso.CreateFolder(rootpath)
End If
Dim size
'转换文件大小
s.LoadFromFile(packname)
size = CInt(StreamToText(s.Read(10)))
str = StreamToText(s.Read(size))
arr = Split(str,vbCrLf)

for i=0 to Ubound(arr)-1
arrFile = Split(arr(i),">")
If arrFile(0) < 0 Then
If Not fso.FolderExists(rootpath&arrFile(1)) Then
fso.CreateFolder(rootpath&arrFile(1))
End If
ElseIf arrFile(0) >= 0 Then
If fso.FileExists(rootpath&arrFile(1)) Then
fso.DeleteFile(rootpath&arrFile(1))
End If
s1.Position = 0
buf = s.Read(arrFile(0))
If Not IsNull(buf) Then s1.Write(buf)
s1.SetEOS
s1.SaveToFile(rootpath&arrFile(1))
End If
Next
End Sub

Public Function StreamToText(stream)
If IsNull(stream) Then
StreamToText = ""
Else
Set sm = server.CreateObject("ADODB.Stream"):sm.Open:sm.Type = 1
sm.Write(stream)
sm.Position = 0
sm.Type = 2
sm.charset = "gb2312"
sm.Position = 0
StreamToText = sm.ReadText()
sm.Close:Set sm = Nothing
End If
End Function

Public Function TextToStream(text)
If text="" Then
TextToStream = "" '这里该如何写？空流？
Else
Set sm = server.CreateObject("ADODB.Stream"):sm.Open:sm.Type = 2:sm.charset = "gb2312"
sm.WriteText(text)
sm.Position = 0
sm.Type = 1
sm.Position = 0
TextToStream = sm.Read
sm.Close:Set sm = Nothing
End If
End Function
End Class