Classic ASP Base64, image/png -> save as image - asp-classic

Question

This particular question has been asked and answered, but no matter what I try I cannot get this to work. At this point I'm somewhat ready to toss my computer out the window..
No matter what combinations i try, it still fails at:
oStream.write imagebinarydata
Here is the code with comments:
sFileName = Server.MapPath("grafer/test.png")
ByteArray = Request.Form("imageData")
ByteArray = [DATA-URI String] 'This string shows the image perfectly fine, in an image tag in the top of the page so it should be perfectly ok?
response.write ("Decoded: " & Base64Decode(ByteArray)) '<- Writes 'PNG' ?
Const adTypeBinary = 1
Const adSaveCreateOverWrite = 2
Set oStream = Server.CreateObject("ADODB.Stream")
oStream.type = adTypeBinary
oStream.open
imagebinarydata = Base64Decode(ByteArray)
oStream.write imagebinarydata '<- FAILS
'Error:
'ADODB.Stream error '800a0bb9'
'Arguments are of the wrong type, are out of acceptable range, or are in conflict with one another.
'Use this form to overwrite a file if it already exists
oStream.savetofile sFileName, adSaveCreateOverWrite
oStream.close
set oStream = nothing
response.write("success")
Function Base64Decode(ByVal vCode)
Dim oXML, oNode
Set oXML = CreateObject("Msxml2.DOMDocument.3.0")
Set oNode = oXML.CreateElement("base64")
oNode.dataType = "bin.base64"
oNode.text = vCode
Base64Decode = Stream_BinaryToString(oNode.nodeTypedValue)
Set oNode = Nothing
Set oXML = Nothing
End Function
Function Stream_BinaryToString(Binary)
Const adTypeText = 2
Const adTypeBinary = 1
'Create Stream object
Dim BinaryStream 'As New Stream
Set BinaryStream = CreateObject("ADODB.Stream")
'Specify stream type - we want To save text/string data.
BinaryStream.Type = adTypeBinary
'Open the stream And write text/string data To the object
BinaryStream.Open
BinaryStream.Write Binary
'Change stream type To binary
BinaryStream.Position = 0
BinaryStream.Type = adTypeText
'Specify charset For the source text (unicode) data.
If Len(CharSet) > 0 Then
BinaryStream.CharSet = CharSet
Else
BinaryStream.CharSet = "us-ascii"
End If
'Open the stream And get binary data from the object
Stream_BinaryToString = BinaryStream.ReadText
End Function

Answer 1

If you are trying to save you can use this function
function SaveToBase64 (base64String)
ImageFileName = "test.jpg"
Set Doc = Server.CreateObject("MSXML2.DomDocument")
Set nodeB64 = Doc.CreateElement("b64")
nodeB64.DataType = "bin.base64"
nodeB64.Text = Mid(base64String, InStr(base64String, ",") + 1)
dim bStream
set bStream = server.CreateObject("ADODB.stream")
bStream.type = 1
bStream.Open()
bStream.Write( nodeB64.NodeTypedValue )
bStream.SaveToFile(Server.Mappath("Images/" & ImageFileName), 2 )
bStream.close()
set bStream = nothing
end function