internal void WritePartWithHeaders(MimePart part, bool copyBoundaryToSkeleton)
{
this.StartPart(null, copyBoundaryToSkeleton);
if ((this.flags & MimeStreamWriter.Flags.SkipHeaders) == MimeStreamWriter.Flags.SkipHeaders && this.mimeTextStream != null)
{
this.mimeTextStream.StartWriting();
this.flags &= (MimeStreamWriter.Flags)(-2);
if (this.mimeWriter == null)
{
goto IL_98;
}
using (Stream rawContentWriteStream = this.mimeWriter.GetRawContentWriteStream())
{
using (Stream rawContentReadStream = part.GetRawContentReadStream())
{
Util.StreamHandler.CopyStreamData(rawContentReadStream, rawContentWriteStream);
}
goto IL_98;
}
}
if (this.mimeWriter != null)
{
using (Stream rawContentWriteStream2 = this.mimeWriter.GetRawContentWriteStream())
{
part.WriteTo(rawContentWriteStream2);
}
}
IL_98:
this.EndPart(copyBoundaryToSkeleton);
}
internal static bool TryGetFileNameFromBinHex(MimePart mimePart, ref string fileName)
{
string text;
using (Stream rawContentReadStream = mimePart.GetRawContentReadStream())
{
try
{
BinHexDecoder binHexDecoder = new BinHexDecoder();
using (EncoderStream encoderStream = new EncoderStream(rawContentReadStream, binHexDecoder, EncoderStreamAccess.Read))
{
byte[] array = new byte[256];
encoderStream.Read(array, 0, array.Length);
text = binHexDecoder.MacBinaryHeader.FileName;
}
}
catch (ByteEncoderException)
{
text = null;
}
}
if (string.IsNullOrEmpty(text))
{
return(false);
}
fileName = text;
return(true);
}
private static bool TryGetFileNameFromUuencode(MimePart part, ref string fileName)
{
byte[] array = new byte[1050];
int inputSize;
using (Stream rawContentReadStream = part.GetRawContentReadStream())
{
inputSize = rawContentReadStream.Read(array, 0, array.Length);
}
bool result;
using (UUDecoder uudecoder = new UUDecoder())
{
byte[] array2 = new byte[1050];
int num;
int num2;
bool flag;
uudecoder.Convert(array, 0, inputSize, array2, 0, array2.Length, false, out num, out num2, out flag);
string fileName2 = uudecoder.FileName;
if (string.IsNullOrEmpty(fileName2))
{
result = false;
}
else
{
fileName = fileName2;
result = true;
}
}
return(result);
}
internal static Stream GetContentReadStream(MimePart part)
{
Stream rawContentReadStream;
if (!part.TryGetContentReadStream(out rawContentReadStream))
{
rawContentReadStream = part.GetRawContentReadStream();
}
return(rawContentReadStream);
}
public override bool FilterPartBody(MimePart part, Stream stream)
{
if (this.embedded)
{
EightToSevenBitConverter.Convert(part.GetRawContentReadStream(), stream);
this.embedded = false;
return(true);
}
if (this.encoder != null)
{
using (Stream stream2 = new EncoderStream(part.GetRawContentReadStream(), this.encoder, EncoderStreamAccess.Read))
{
DataStorage.CopyStreamToStream(stream2, stream, long.MaxValue, ref this.scratchBuffer);
this.encoder = null;
return(true);
}
return(false);
}
return(false);
}
internal static void CalculateBodySize(MimePartInfo partInfo, MimePart part)
{
if (partInfo.IsBodySizeComputed)
{
return;
}
using (Stream stream = new MimeStreamWriter.MimeBodySizeCounter(null, partInfo))
{
using (Stream rawContentReadStream = part.GetRawContentReadStream())
{
Util.StreamHandler.CopyStreamData(rawContentReadStream, stream);
}
}
}