<%
'*********************************************************
'文件名称: Ex_UploadCls.asp
'功能描述: 易心博客上传类
'程序制作：易心 [修改自无惧上传类 V1.2]
'官方网站: http://www.ex123.net
'论坛支持：http://bbs.ex123.net
'程序演示：http://exblog.ex123.net
'Copyright (C) 2007 ex123.net All rights reserved.
'LastUpdate:    2007-7-23
'*********************************************************
Dim oUpFileStream
'----------------------------------------------------------------------
'文件上传类
Class Ex_UploadCls

Dim Form,File,Version,Err 
Dim AllowExt,NoExt
Private Sub Class_Initialize
    AllowExt="jpg/gif/bmp/png/exe/rar/zip/pdf/rm/doc/txt"
    NoExt="asp/aspx/asa/cer/php/php3/php4/jsp/html/shtml/cgi"
    Err = -1
End Sub

Private Sub Class_Terminate  
  '清除变量及对像
  If Err < 0 Then
    Form.RemoveAll
    Set Form = Nothing
    File.RemoveAll
    Set File = Nothing
    oUpFileStream.Close
    Set oUpFileStream = Nothing
  End If
End Sub
'检测上传的文件是否是允许上传的文件类型
Private Function  CheckValidExt(sExt)
	Dim b, i, aExt
	b = False  '默认是不允许上传的文件类型
	aExt = Split(AllowExt, "/")
	For i = 0 To UBound(aExt)
		If Trim(UCase(aExt(i))) = Trim(UCase(sExt)) Then
			b = True  
			Exit For
		End If
	Next
	aExt = Split(noExt, "/")
	For i = 0 To UBound(aExt)
		If Trim(UCase(aExt(i))) = Trim(UCase(sExt)) Then
			b = false   
			Exit For
		End If
	Next
	If b = False Then
		CheckValidExt=CBool(False)
	Else 
		CheckValidExt=CBool(True)
	End If
End Function 
Public Sub GetData (MaxSize)
  'On Error Resume Next 
   '定义变量
  Dim RequestBinData,sSpace,bCrLf,sInfo,iInfoStart,iInfoEnd,tStream,iStart,oFileInfo
  Dim iFileSize,sFilePath,sFileType,sFormValue,sFileName
  Dim iFindStart,iFindEnd
  Dim iFormStart,iFormEnd,sFormName
   '代码开始
  If Request.TotalBytes < 1 Then  '如果没有数据上传
    Err = 1
	Exit Sub 
  End If
  If MaxSize > 0 Then '如果限制大小
    If Request.TotalBytes > MaxSize*1024 Then
    Err = 2	'如果上传的数据超出限制
    Exit Sub
    End If
  End If
  Set Form = Server.CreateObject ("Scripting.Dictionary")
  Form.CompareMode = 1
  Set File = Server.CreateObject ("Scripting.Dictionary")
  File.CompareMode = 1
  Set tStream = Server.CreateObject ("ADODB.Stream")
  Set oUpFileStream = Server.CreateObject ("ADODB.Stream")
  oUpFileStream.Type = 1
  oUpFileStream.Mode = 3
  oUpFileStream.Open 
  oUpFileStream.Write Request.BinaryRead (Request.TotalBytes)
  oUpFileStream.Position = 0
  RequestBinData = oUpFileStream.Read 
  iFormEnd = oUpFileStream.Size
  bCrLf = ChrB (13) & ChrB (10)
  '取得每个项目之间的分隔符
  sSpace = MidB (RequestBinData,1, InStrB (1,RequestBinData,bCrLf)-1)
  iStart = LenB  (sSpace)
  iFormStart = iStart+2
  '分解项目
  Do
    iInfoEnd = InStrB (iFormStart,RequestBinData,bCrLf & bCrLf)+3
    tStream.Type = 1
    tStream.Mode = 3
    tStream.Open
    oUpFileStream.Position = iFormStart
    oUpFileStream.CopyTo tStream,iInfoEnd-iFormStart
    tStream.Position = 0
    tStream.Type = 2
    tStream.CharSet = "gb2312"
    sInfo = tStream.ReadText      
    '取得表单项目名称
    iFormStart = InStrB (iInfoEnd,RequestBinData,sSpace)-1
    iFindStart = InStr (22,sInfo,"name=""",1)+6
    iFindEnd = InStr (iFindStart,sInfo,"""",1)
    sFormName = Mid  (sinfo,iFindStart,iFindEnd-iFindStart)
    '如果是文件
    If InStr  (45,sInfo,"filename=""",1) > 0 Then
      Set oFileInfo = new FileInfo_Class
      '取得文件属性
      iFindStart = InStr (iFindEnd,sInfo,"filename=""",1)+10
      iFindEnd = InStr (iFindStart,sInfo,"""",1)
      sFileName = Mid  (sinfo,iFindStart,iFindEnd-iFindStart)
      oFileInfo.FileName = Mid (sFileName,InStrRev (sFileName, "\")+1)
      oFileInfo.FilePath = Left (sFileName,InStrRev (sFileName, "\"))
      oFileInfo.FileExt = Mid (sFileName,InStrRev (sFileName, ".")+1)
	  If Trim(oFileInfo.FileExt)<>"" Then 
		If CheckValidExt(oFileInfo.FileExt)=False Then '如果是不允许上传的文件类型
			Err=3
			Exit Sub 
		End If 
	  End If 
      iFindStart = InStr (iFindEnd,sInfo,"Content-Type: ",1)+14
      iFindEnd = InStr (iFindStart,sInfo,vbCr)
      oFileInfo.FileType = Mid  (sinfo,iFindStart,iFindEnd-iFindStart)
      oFileInfo.FileStart = iInfoEnd
      oFileInfo.FileSize = iFormStart -iInfoEnd -2
      oFileInfo.FormName = sFormName
      file.add sFormName,oFileInfo
    else
    '如果是表单项目
      tStream.Close
      tStream.Type = 1
      tStream.Mode = 3
      tStream.Open
      oUpFileStream.Position = iInfoEnd 
      oUpFileStream.CopyTo tStream,iFormStart-iInfoEnd-2
      tStream.Position = 0
      tStream.Type = 2
      tStream.CharSet = "gb2312"
      sFormValue = tStream.ReadText
      If Form.Exists (sFormName) Then
        Form (sFormName) = Form (sFormName) & ", " & sFormValue
        else
        form.Add sFormName,sFormValue
      End If
    End If
    tStream.Close
    iFormStart = iFormStart+iStart+2
    '如果到文件尾了就退出
  Loop Until  (iFormStart+2) >= iFormEnd 
  RequestBinData = ""
  Set tStream = Nothing
End Sub
End Class

'----------------------------------------------------------------------------------------------------
'文件属性类
Class FileInfo_Class
Dim FormName,FileName,FilePath,FileSize,FileType,FileStart,FileExt
'保存文件方法
Public Function SaveToFile (Path)
  'On Error Resume Next
  Dim oFileStream
  Set oFileStream = CreateObject ("ADODB.Stream")
  oFileStream.Type = 1
  oFileStream.Mode = 3
  oFileStream.Open
  oUpFileStream.Position = FileStart
  oUpFileStream.CopyTo oFileStream,FileSize
  oFileStream.SaveToFile Path,2
  oFileStream.Close
  Set oFileStream = Nothing 
End Function
 
'取得文件数据
Public Function FileData
  oUpFileStream.Position = FileStart
  FileData = oUpFileStream.Read (FileSize)
End Function

End Class
%>
