freeaspupload.asp

多多

<%
'  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.

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

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

		'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

		VarArrayBinRequest = Request.BinaryRead(Request.TotalBytes)

		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, sFileName
				Set oUploadFile = New UploadedFile
				
				nCurPos = SkipToken(tFilename, nCurPos)
				sFileName = ExtractField(tDoubleQuotes, nCurPos)
				oUploadFile.FileName = Right(sFileName, Len(sFileName)-InStrRev(sFileName, "\"))

				if (Len(oUploadFile.FileName) > 0) then 'File field not left empy
					nCurPos = SkipToken(tContentType, nCurPos)
					
					oUploadFile.ContentType = ExtractField(tNewLine, nCurPos)
					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))
			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

	Public Function SaveBinRequest(path) ' For debugging purposes
		StreamRequest.SaveToFile path & "debugStream.bin", 2
	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 FileName
	Public Start
	Public Length
	Public Path
End Class
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