public static string Decode(string literals, string transferEncoding, string charset)
{
Encoding targetEncoding;
var value = charset.ToLower();
switch (value)
{
case "cp1252":
// Cp1252 is not recognized under this name
charset = Charsets.Windows1252;
break;
case "x-unknown":
charset = Charsets.Utf8;
break;
}
try {
// if this goes haywire
targetEncoding = Encoding.GetEncoding(charset);
} catch (ArgumentException) {
// try this one
targetEncoding = Encoding.UTF8;
}
switch (transferEncoding.ToLower())
{
case ContentTransferEncodings.QuotedPrintable: {
return(QpConverter.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(QpConverter.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);
}
}
}
