private void DecodeData()
{
// if this data is an attachment ...
// if BASE-64 data ...
if (_contentTransferEncoding != null)
{
if (_contentTransferEncoding.ToUpper()
.Equals("BASE64"))
{
// convert attachment from BASE64 ...
BinaryData =
Convert.FromBase64String(_data.Replace("\n", ""));
_data = System.Text.Encoding.ASCII.GetString(BinaryData);
}
else
// if PRINTABLE ...
if (
_contentTransferEncoding.ToUpper()
.Equals("QUOTED-PRINTABLE"))
{
_data = Pop3Statics.FromQuotedPrintable(_data);
}
}
}
internal static string Subject(string line)
{
var subject =
Regex.Replace(line
, @"^Subject: (.*)$"
, "$1");
var match = Regex.Match(subject, @"=\?(?<charset>[^\?]+)\?(?<encoding>[BQ])\?(?<data>[^\?]+)\?=");
if (match.Success)
{
if (match.Groups["encoding"].Value == "B")
{
var data = Convert.FromBase64String(match.Groups["data"].Value);
return(Encoding.ASCII.GetString(data));
}
else
{
return(Pop3Statics.FromQuotedPrintable(match.Groups["data"].Value));
}
}
return(subject);
}