File Manager

<%
' For examples, documentation, and your own free copy, go to:
' http://www.freeaspupload.net
' Note: You can copy and use this script for free and you can make changes
' to the code, but you cannot remove the above comment.

'Changes:
'Aug 2, 2005: Add support for checkboxes and other input elements with multiple values

Class FreeASPUpload
	Public UploadedFiles
	Public FormElements

Private VarArrayBinRequest
	Private StreamRequest
	Private uploadedYet

Private Sub Class_Initialize()
		Set UploadedFiles = Server.CreateObject("Scripting.Dictionary")
		Set FormElements = Server.CreateObject("Scripting.Dictionary")
		Set StreamRequest = Server.CreateObject("ADODB.Stream")
		StreamRequest.Type = 1 'adTypeBinary
		StreamRequest.Open
		uploadedYet = false
	End Sub
	
	Private Sub Class_Terminate()
		If IsObject(UploadedFiles) Then
			UploadedFiles.RemoveAll()
			Set UploadedFiles = Nothing
		End If
		If IsObject(FormElements) Then
			FormElements.RemoveAll()
			Set FormElements = Nothing
		End If
		StreamRequest.Close
		Set StreamRequest = Nothing
	End Sub

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

Public Property Get Files()
		Files = UploadedFiles.Items
	End Property

'Calls Upload to extract the data from the binary request and then saves the uploaded files
	Public Sub Save(path)
		Dim streamFile, fileItem

if Right(path, 1) <> "\" then path = path & "\"

if not uploadedYet then Upload

For Each fileItem In UploadedFiles.Items
			Set streamFile = Server.CreateObject("ADODB.Stream")
			streamFile.Type = 1
			streamFile.Open
			StreamRequest.Position=fileItem.Start
			StreamRequest.CopyTo streamFile, fileItem.Length
			streamFile.SaveToFile path & fileItem.FileName, 2
			streamFile.close
			Set streamFile = Nothing
			fileItem.Path = path & fileItem.FileName
		 Next
	End Sub

Public Function SaveBinRequest(path) ' For debugging purposes
		StreamRequest.SaveToFile path & "\debugStream.bin", 2
	End Function

Public Sub DumpData() 'only works if files are plain text
		Dim i, aKeys, f
		response.write "Form Items: "
		aKeys = FormElements.Keys
		For i = 0 To FormElements.Count -1 ' Iterate the array
			response.write aKeys(i) & " = " & FormElements.Item(aKeys(i)) & " "
		Next
		response.write "Uploaded Files: "
		For Each f In UploadedFiles.Items
			response.write "Name: " & f.FileName & " "
			response.write "Type: " & f.ContentType & " "
			response.write "Start: " & f.Start & " "
			response.write "Size: " & f.Length & " "
		 Next
 	End Sub

Private Sub Upload()
		Dim nCurPos, nDataBoundPos, nLastSepPos
		Dim nPosFile, nPosBound
		Dim sFieldName, osPathSep, auxStr

'RFC1867 Tokens
		Dim vDataSep
		Dim tNewLine, tDoubleQuotes, tTerm, tFilename, tName, tContentDisp, tContentType
		tNewLine = Byte2String(Chr(13))
		tDoubleQuotes = Byte2String(Chr(34))
		tTerm = Byte2String("--")
		tFilename = Byte2String("filename=""")
		tName = Byte2String("name=""")
		tContentDisp = Byte2String("Content-Disposition")
		tContentType = Byte2String("Content-Type:")

uploadedYet = true

on error resume next
		VarArrayBinRequest = Request.BinaryRead(Request.TotalBytes)
		if Err.Number <> 0 then 
			response.write " System reported this error:"
			response.write Err.Description & ""
			response.write "The most likely cause for this error is the incorrect setup of AspMaxRequestEntityAllowed in IIS MetaBase. Please see instructions in the <A HREF='http://www.freeaspupload.net/freeaspupload/requirements.asp'>requirements page of freeaspupload.net</A>."
			Exit Sub
		end if
		on error goto 0 'reset error handling

nCurPos = FindToken(tNewLine,1) 'Note: nCurPos is 1-based (and so is InstrB, MidB, etc)

If nCurPos <= 1 Then Exit Sub
		 
		'vDataSep is a separator like -----------------------------21763138716045
		vDataSep = MidB(VarArrayBinRequest, 1, nCurPos-1)

'Start of current separator
		nDataBoundPos = 1

'Beginning of last line
		nLastSepPos = FindToken(vDataSep & tTerm, 1)

Do Until nDataBoundPos = nLastSepPos
			
			nCurPos = SkipToken(tContentDisp, nDataBoundPos)
			nCurPos = SkipToken(tName, nCurPos)
			sFieldName = ExtractField(tDoubleQuotes, nCurPos)

nPosFile = FindToken(tFilename, nCurPos)
			nPosBound = FindToken(vDataSep, nCurPos)
			
			If nPosFile <> 0 And nPosFile < nPosBound Then
				Dim oUploadFile
				Set oUploadFile = New UploadedFile
				
				nCurPos = SkipToken(tFilename, nCurPos)
				auxStr = ExtractField(tDoubleQuotes, nCurPos)
 ' We are interested only in the name of the file, not the whole path
 ' Path separator is \ in windows, / in UNIX
 ' While IE seems to put the whole pathname in the stream, Mozilla seem to 
 ' only put the actual file name, so UNIX paths may be rare. But not impossible.
 osPathSep = "\"
 if InStr(auxStr, osPathSep) = 0 then osPathSep = "/"
				oUploadFile.FileName = Right(auxStr, Len(auxStr)-InStrRev(auxStr, osPathSep))

if (Len(oUploadFile.FileName) > 0) then 'File field not left empty
					nCurPos = SkipToken(tContentType, nCurPos)
					
                    auxStr = ExtractField(tNewLine, nCurPos)
                    ' NN on UNIX puts things like this in the streaa:
                    '    ?? python py type=?? python application/x-python
					oUploadFile.ContentType = Right(auxStr, Len(auxStr)-InStrRev(auxStr, " "))
					nCurPos = FindToken(tNewLine, nCurPos) + 4 'skip empty line
					
					oUploadFile.Start = nCurPos-1
					oUploadFile.Length = FindToken(vDataSep, nCurPos) - 2 - nCurPos
					
					If oUploadFile.Length > 0 Then UploadedFiles.Add LCase(sFieldName), oUploadFile
				End If
			Else
				Dim nEndOfData
				nCurPos = FindToken(tNewLine, nCurPos) + 4 'skip empty line
				nEndOfData = FindToken(vDataSep, nCurPos) - 2
				If Not FormElements.Exists(LCase(sFieldName)) Then 
					FormElements.Add LCase(sFieldName), String2Byte(MidB(VarArrayBinRequest, nCurPos, nEndOfData-nCurPos))
				else
                    FormElements.Item(LCase(sFieldName))= FormElements.Item(LCase(sFieldName)) & ", " & String2Byte(MidB(VarArrayBinRequest, nCurPos, nEndOfData-nCurPos)) 
                end if

End If

'Advance to next separator
			nDataBoundPos = FindToken(vDataSep, nCurPos)
		Loop
		StreamRequest.Write(VarArrayBinRequest)
	End Sub

Private Function SkipToken(sToken, nStart)
		SkipToken = InstrB(nStart, VarArrayBinRequest, sToken)
		If SkipToken = 0 then
			Response.write "Error in parsing uploaded binary request."
			Response.End
		end if
		SkipToken = SkipToken + LenB(sToken)
	End Function

Private Function FindToken(sToken, nStart)
		FindToken = InstrB(nStart, VarArrayBinRequest, sToken)
	End Function

Private Function ExtractField(sToken, nStart)
		Dim nEnd
		nEnd = InstrB(nStart, VarArrayBinRequest, sToken)
		If nEnd = 0 then
			Response.write "Error in parsing uploaded binary request."
			Response.End
		end if
		ExtractField = String2Byte(MidB(VarArrayBinRequest, nStart, nEnd-nStart))
	End Function

'String to byte string conversion
	Private Function Byte2String(sString)
		Dim i
		For i = 1 to Len(sString)
		   Byte2String = Byte2String & ChrB(AscB(Mid(sString,i,1)))
		Next
	End Function

'Byte string to string conversion
	Private Function String2Byte(bsString)
		Dim i
		String2Byte =""
		For i = 1 to LenB(bsString)
		   String2Byte = String2Byte & Chr(AscB(MidB(bsString,i,1))) 
		Next
	End Function
End Class

Class UploadedFile
	Public ContentType
	Public Start
	Public Length
	Public Path
	Private nameOfFile

' Need to remove characters that are valid in UNIX, but not in Windows
 Public Property Let FileName(fN)
 nameOfFile = fN
 nameOfFile = SubstNoReg(nameOfFile, "\", "_")
 nameOfFile = SubstNoReg(nameOfFile, "/", "_")
 nameOfFile = SubstNoReg(nameOfFile, ":", "_")
 nameOfFile = SubstNoReg(nameOfFile, "*", "_")
 nameOfFile = SubstNoReg(nameOfFile, "?", "_")
 nameOfFile = SubstNoReg(nameOfFile, """", "_")
 nameOfFile = SubstNoReg(nameOfFile, "<", "_")
 nameOfFile = SubstNoReg(nameOfFile, ">", "_")
 nameOfFile = SubstNoReg(nameOfFile, "|", "_")
 End Property

Public Property Get FileName()
        FileName = nameOfFile
    End Property

'Public Property Get FileN()ame
End Class

' Does not depend on RegEx, which is not available on older VBScript
' Is not recursive, which means it will not run out of stack space
Function SubstNoReg(initialStr, oldStr, newStr)
 Dim currentPos, oldStrPos, skip
 If IsNull(initialStr) Or Len(initialStr) = 0 Then
 SubstNoReg = ""
 ElseIf IsNull(oldStr) Or Len(oldStr) = 0 Then
 SubstNoReg = initialStr
 Else
 If IsNull(newStr) Then newStr = ""
 currentPos = 1
 oldStrPos = 0
 SubstNoReg = ""
 skip = Len(oldStr)
 Do While currentPos <= Len(initialStr)
 oldStrPos = InStr(currentPos, initialStr, oldStr)
 If oldStrPos = 0 Then
 SubstNoReg = SubstNoReg & Mid(initialStr, currentPos, Len(initialStr) - currentPos + 1)
 currentPos = Len(initialStr) + 1
 Else
 SubstNoReg = SubstNoReg & Mid(initialStr, currentPos, oldStrPos - currentPos) & newStr
 currentPos = oldStrPos + skip
 End If
 Loop
 End If
End Function
%>

File Manager

Editing: journal/freeASPUpload.asp