private byte[] GetBytes(string text, string encoding)
{
if (encoding == "base64")
{
return(Convert.FromBase64String(text));
}
if (encoding == "quoted-printable")
{
var decoder = new QuotedPrintable();
var iso = Encoding.GetEncoding("ISO-8859-1");
return(Encoding.UTF8.GetBytes(iso.GetString(decoder.Decode(text))));
}
return(Encoding.UTF8.GetBytes(text));
}
private void OnHandleDataCommand(IncommingMail context, string commandLine)
{
// parse header data here
if (commandLine == string.Empty)
{
context.State = SmtpState.Body;
return;
}
if (commandLine.StartsWith("Subject:", StringComparison.InvariantCultureIgnoreCase))
{
context.Message.Subject = commandLine.Substring(8).Trim();
if (context.Message.Subject.StartsWith("=") && context.Message.Subject.EndsWith("="))
{
var decoder = new QuotedPrintable();
var iso = Encoding.GetEncoding("ISO-8859-1");
context.Message.Subject = iso.GetString(decoder.Decode(context.Message.Subject));
}
context.RecentLine = commandLine;
return;
}
if (commandLine.StartsWith("Content-Type:", StringComparison.InvariantCultureIgnoreCase))
{
var contentType = commandLine.Substring(13).Trim();
if (context.IsMultipart)
{
context.PartContentType = contentType;
if (contentType.Contains("name="))
{
var name = contentType.IndexOf("name=", StringComparison.InvariantCultureIgnoreCase);
context.PartName = contentType.Substring(name + 5).Trim();
}
if (string.IsNullOrEmpty(context.PartName) && contentType.Contains("file="))
{
var file = contentType.IndexOf("file=", StringComparison.InvariantCultureIgnoreCase);
context.PartName = contentType.Substring(file + 5).Trim();
}
if (string.IsNullOrEmpty(context.PartName) && contentType.Contains("filename="))
{
var filename = context.PartDisposition.IndexOf("filename=", StringComparison.InvariantCultureIgnoreCase);
context.PartName = context.PartDisposition.Substring(filename + 9).Trim();
}
}
else
{
context.ContentType = contentType;
if (contentType.Contains("multipart") && contentType.Contains("boundary="))
{
var boundary = contentType.IndexOf("boundary=", StringComparison.InvariantCultureIgnoreCase);
context.Boundary = contentType.Substring(boundary + 9).Trim();
}
}
if (context.IsMultipart && commandLine.Contains("boundary="))
{
var boundary = commandLine.IndexOf("boundary=", StringComparison.InvariantCultureIgnoreCase);
context.Boundary = commandLine.Substring(boundary + 9).Trim();
}
context.RecentLine = commandLine;
return;
}
if (commandLine.StartsWith("Content-Disposition:", StringComparison.InvariantCultureIgnoreCase))
{
var disposition = commandLine.Substring(20).Trim();
context.PartDisposition = disposition;
context.RecentLine = commandLine;
return;
}
if (commandLine.StartsWith("Content-Transfer-Encoding:", StringComparison.InvariantCultureIgnoreCase))
{
var encoding = commandLine.Substring(26).Trim();
if (context.IsMultipart)
{
context.PartContentEncoding = encoding;
}
else
{
context.ContentEncoding = encoding;
}
context.RecentLine = commandLine;
}
}