<%@ Language=VBScript %>
<%Option Explicit%>
<%

Dim base_directory, max_bytes

'The directory where the files will be stored 
base_directory = "c:\temp\"

'the maxim upload size 
max_bytes = 104857600

If Request.TotalBytes > max_bytes Then
	Response.Status = "500 Max upload size exceeded"
	Response.End
End If

function URLDecode(str)
	dim re
	set re = new RegExp

	str = Replace(str, "+", " ")
	
	re.Pattern = "%([0-9a-fA-F]{2})"
	re.Global = True
	URLDecode = re.Replace(str, GetRef("URLDecodeHex"))
end function

function URLDecodeHex(match, hex_digits, pos, source)
	URLDecodeHex = chr("&H" & hex_digits)
end function

Class FileUploader
	Public  Files
	Private mcolFormElem

	Private Sub Class_Initialize()
		Set Files = Server.CreateObject("Scripting.Dictionary")
		Set mcolFormElem = Server.CreateObject("Scripting.Dictionary")
	End Sub
	
	Private Sub Class_Terminate()
		If IsObject(Files) Then
			Files.RemoveAll()
			Set Files = Nothing
		End If
		If IsObject(mcolFormElem) Then
			mcolFormElem.RemoveAll()
			Set mcolFormElem = Nothing
		End If
	End Sub

	Public Property Get Form(sIndex)
		Form = ""
		If mcolFormElem.Exists(LCase(sIndex)) Then Form = mcolFormElem.Item(LCase(sIndex))
	End Property

	Public Default Sub Upload()
		Dim biData, sInputName
		Dim nPosBegin, nPosEnd, nPos, vDataBounds, nDataBoundPos
		Dim nPosFile, nPosBound

		biData = Request.BinaryRead(Request.TotalBytes)
		nPosBegin = 1
		nPosEnd = InstrB(nPosBegin, biData, CByteString(Chr(13)))
		
		If (nPosEnd-nPosBegin) <= 0 Then Exit Sub
		 
		vDataBounds = MidB(biData, nPosBegin, nPosEnd-nPosBegin)
		nDataBoundPos = InstrB(1, biData, vDataBounds)
		
		Do Until nDataBoundPos = InstrB(biData, vDataBounds & CByteString("--"))
			
			nPos = InstrB(nDataBoundPos, biData, CByteString("Content-Disposition"))
			nPos = InstrB(nPos, biData, CByteString("name="))
			nPosBegin = nPos + 6
			nPosEnd = InstrB(nPosBegin, biData, CByteString(Chr(34)))
			sInputName = CWideString(MidB(biData, nPosBegin, nPosEnd-nPosBegin))
			nPosFile = InstrB(nDataBoundPos, biData, CByteString("filename="))
			nPosBound = InstrB(nPosEnd, biData, vDataBounds)
			
			If nPosFile <> 0 And  nPosFile < nPosBound Then
				Dim oUploadFile, sFileName
				Set oUploadFile = New UploadedFile
				
				nPosBegin = nPosFile + 10
				nPosEnd =  InstrB(nPosBegin, biData, CByteString(Chr(34)))
				sFileName = CWideString(MidB(biData, nPosBegin, nPosEnd-nPosBegin))
				oUploadFile.FileName = URLDecode(Right(sFileName, Len(sFileName)-InStrRev(sFileName, "\")))

				nPos = InstrB(nPosEnd, biData, CByteString("Content-Type:"))
				nPosBegin = nPos + 14
				nPosEnd = InstrB(nPosBegin, biData, CByteString(Chr(13)))
				
				oUploadFile.ContentType = CWideString(MidB(biData, nPosBegin, nPosEnd-nPosBegin))
				
				nPosBegin = nPosEnd+4
				nPosEnd = InstrB(nPosBegin, biData, vDataBounds) - 2
				oUploadFile.FileData = MidB(biData, nPosBegin, nPosEnd-nPosBegin)
				
				If oUploadFile.FileSize > 0 Then Files.Add LCase(oUploadFile.FileName), oUploadFile
			Else
				nPos = InstrB(nPos, biData, CByteString(Chr(13)))
				nPosBegin = nPos + 4
				nPosEnd = InstrB(nPosBegin, biData, vDataBounds) - 2
				If Not mcolFormElem.Exists(LCase(sInputName)) Then mcolFormElem.Add LCase(sInputName), CWideString(MidB(biData, nPosBegin, nPosEnd-nPosBegin))
			End If

			nDataBoundPos = InstrB(nDataBoundPos + LenB(vDataBounds), biData, vDataBounds)
		Loop
	End Sub

	'String to byte string conversion
	Private Function CByteString(sString)
		Dim nIndex
		For nIndex = 1 to Len(sString)
		   CByteString = CByteString & ChrB(AscB(Mid(sString,nIndex,1)))
		Next
	End Function

	'Byte string to string conversion
	Private Function CWideString(bsString)
		Dim nIndex
		CWideString =""
		For nIndex = 1 to LenB(bsString)
		   CWideString = CWideString & Chr(AscB(MidB(bsString,nIndex,1))) 
		Next
	End Function
End Class

Function MultiByteToBinary(MultiByte)
  Dim RS, LMultiByte, Binary
  Const adLongVarBinary = 205
  Set RS = CreateObject("ADODB.Recordset")
  LMultiByte = LenB(MultiByte)
  If LMultiByte>0 Then
    RS.Fields.Append "mBinary", adLongVarBinary, LMultiByte
    RS.Open
    RS.AddNew
      RS("mBinary").AppendChunk MultiByte & ChrB(0)
    RS.Update
    Binary = RS("mBinary").GetChunk(LMultiByte)
  End If
  MultiByteToBinary = Binary
End Function

Function SaveBinaryData(FileName, ByteArray)
  Const adTypeBinary = 1
  Const adSaveCreateOverWrite = 2
  
  Dim BinaryStream
  Set BinaryStream = CreateObject("ADODB.Stream")
  
  BinaryStream.Type = adTypeBinary
  
  BinaryStream.Open
  BinaryStream.Write ByteArray
  
  BinaryStream.SaveToFile FileName, adSaveCreateOverWrite
End Function

Class UploadedFile
	Public ContentType
	Public FileName
	Public FileData
	
	Public Property Get FileSize()
		FileSize = LenB(FileData)
	End Property

	Public Sub SaveToDisk(sPath, formDir)
		Dim oFS, oFile
		Dim nIndex
	
		FileName = Replace(FileName, "/", "\")

		If sPath = "" Or FileName = "" Then Exit Sub
		If Mid(sPath, Len(sPath)) <> "\" Then sPath = sPath & "\"
	
		Set oFS = Server.CreateObject("Scripting.FileSystemObject")
		
		FileName = formDir & "\" & FileName
		Dim folders, numFolders
		folders = Split(FileName, "\")
		numFolders = UBound(folders)
		Dim i, j, folderTmp
		i = 0
		
		While i < numFolders
			j = 1
			folderTmp = sPath & folders(0)
			While j <= i
				folderTmp = folderTmp & "\" & folders(j)
				j = j + 1
			Wend

			If Not oFS.FolderExists(folderTmp) Then oFS.CreateFolder(folderTmp)
			i = i + 1
		Wend

		FileName = sPath & FileName

		SaveBinaryData FileName, MultiByteToBinary(FileData)

	End Sub
End Class

' Create the FileUploader
Dim Up, File

Set Up = New FileUploader

Up.Upload()

' Save files to disk
For Each File in Up.Files.Items
	File.SaveToDisk base_directory, Replace(Up.Form("directory"), "/", "\")
	If Err <> 0 Then
		Response.Status = "500 Internal Server Error"
		Response.Write "Error"
		Exit For
	End If
Next


%>