public static string Decode(string literals, string transferEncoding, string charset)
{
Encoding targetEncoding;
// Cp1252 is not recognized under this name
if (charset.ToLower() == "cp1252")
{
charset = Charsets.Ansi;
}
try {
// if this goes haywire
targetEncoding = Encoding.GetEncoding(charset);
}
catch (Exception) {
// try this one
targetEncoding = Encoding.UTF8;
}
switch (transferEncoding.ToLower())
{
case ContentTransferEncodings.QuotedPrintable:
{
return(QuotedPrintableConverter.FromQuotedPrintable(literals, targetEncoding));
}
case ContentTransferEncodings.Base64:
{
var bytes = Convert.FromBase64String(literals);
return(targetEncoding.GetString(bytes));
}
default:
{
// no encoding
return(literals);
}
}
}
public static string Encode(string text, string transferEncoding, string charset, bool useBockText = true)
{
switch (transferEncoding)
{
case ContentTransferEncodings.QuotedPrintable:
{
var bytes = Encoding.UTF8.GetBytes(text);
return(QuotedPrintableConverter.ToQuotedPrintableString(bytes));
}
case ContentTransferEncodings.None:
{
return(text);
}
default:
{
var bytes = Encoding.UTF8.GetBytes(text);
var encodedText = Convert.ToBase64String(bytes);
return(useBockText ? encodedText.ToBlockText(76) : encodedText);
}
}
}