ByteArray - Punycode - unicode conversions

Sample for ScriptUtils.ByteArray.Punycode | Changes | Purchase | Download

Examples

Short functions to encode/decode string<->punycode data. You can use these functions as an Internationalized Domain Names VBScript converter.

  • punycode to unicode conversion
  • unicode string to punycode conversion
  • IDN string to unicode conversion
  • unicode string to IDN string conversion
    See Live punycode idn decoder/encoder.
    ByteArray - Punycode - unicode conversions 
    Dim m_BA
    Function BA
      If IsEmpty(m_BA) Then Set m_BA = CreateObject("ScriptUtils.ByteArray"): m_BA.CharSet = "utf-8"
      Set BA = m_BA
    End Function
    
    'conversion from unicode string to punycode
    Function ToPUNYCODE(Data)
      Dim Outdata
      BA.String = Data
      
      Outdata =  "<div>ToPUNYCODE : Punycode representation of '" & _
       Data & "' string :<div style=background-color:yellow;color:blue>" 
      Outdata = Outdata & "<b>" & BA.Punycode & "</b>"
      Outdata = Outdata & "</div></div>"
      ToPUNYCODE = Outdata 
    End Function
    
    'conversion from punycode string (OLE String) to a UNICODE string
    Function FromPUNYCODE(Data)
      Dim Outdata
      On Error Resume Next
      BA.Punycode = Data
      If Err=0 Then
        Outdata =  "<div>FromPUNYCODE : Unicode string :<div style=background-color:yellow;color:blue>" 
        Outdata = Outdata & "<b>" & BA.String & "</b>"'write the UTF representation
        Outdata = Outdata & "</div></div>"
      Else
        Outdata =  "<div style=background-color:red;color:yellow>FromPUNYCODE:Punycode string '" & _
         Data & "' has no unicode representation.</div>" 
      End If
      FromPUNYCODE = Outdata 
    End Function
    
    'conversion of a host name (www.anychar.com) to a punycode idn version (www.xn--translated.com)
    Function ToIDN(Data)
      Dim Outdata, pData, partuni, partpuny
      
      pData = Split(Data, ".")
    
      For Each partuni In pData
        BA.String = partuni
        partpuny = BA.Punycode
        If Right(partpuny,1)<>"-" Then partpuny = "xn--" & partpuny Else partpuny = partuni
    
        Outdata = Outdata & partpuny & "."
      Next
      Outdata = Left(Outdata, Len(Outdata)-1)
      ToIDN =  "<div>ToIDN : IDN representation of '" & _
       Data & "' string :<div style=background-color:yellow;color:blue><b>" & _
       Outdata & "</b></div></div>"
    End Function
    
    'conversion of a host name in idn punycode (www.xn--translated.com) 
    ' to an unicode string (www.anychar.com)
    Function FromIDN(ByVal Data)
      Dim Outdata, pData, partuni, partpuny
      Data = LCase(Data)
      pData = Split(Data, ".")
      For Each partpuny In pData
        If Left(partpuny,4)="xn--" Then
          BA.Punycode = Mid(partpuny, 5)
          partuni = Ba.String
        Else
          'on error resume next
          'BA.Punycode = partpuny
          Dim re :set re = New RegExp
          re.pattern = "^[-a-zA-Z0-9]+$"
          
          If re.Test(partpuny) Then
            partuni = partpuny
          Else
            partuni = "<font Color=red>error (" & partpuny & ")</Font>"
          End If
        End If
    
        Outdata = Outdata & partuni & "."
      Next
      Outdata = Left(Outdata, Len(Outdata)-1)
      FromIDN = "<div>FromIDN : Unicode representation of IDN '" & Data & _
       "' :<div style=background-color:yellow;color:blue><b>" & _
       Outdata & "</b></div></div>"
    End Function

    Other links for the ByteArray - Punycode - unicode conversions sample

    ScriptUtils.ByteArray

    Works with safearray binary data - save/restore binary data from/to a disk, convert to a string/hexstring, codepage/charset conversions, Base64 conversion, etc.
         ByteArray is a COM class specially designed to work with Microsoft Windows Scripting engines - VB Script and JScript in Active Server Pages or WSH and in CHM or HTA applications. It also works with VB Net, Visual basic (VBA - VB 5, VB 6, Word, Excel, Access, ), C#, J#, C++, ASP, ASP.Net, Delphi and with T-SQL OLE functions - see Use ByteArray object article. You can also use the object in other programming environments with COM support, such is PowerBuilder.
         Source code for ByteArray is available within distribution license, please see License page for ASP file upload and ScriptUtilities.

    ScriptUtils

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