internal void SetContentFromString(string contentString, Encoding encoding, string mediaType)
{
if (contentString == null)
{
throw new ArgumentNullException("content");
}
if (this.part.Stream != null)
{
this.part.Stream.Close();
}
if ((mediaType == null) || (mediaType == string.Empty))
{
mediaType = "text/plain";
}
int offset = 0;
try
{
if (((MailBnfHelper.ReadToken(mediaType, ref offset, null).Length == 0) || (offset >= mediaType.Length)) || (mediaType[offset++] != '/'))
{
throw new ArgumentException(SR.GetString("MediaTypeInvalid"), "mediaType");
}
if ((MailBnfHelper.ReadToken(mediaType, ref offset, null).Length == 0) || (offset < mediaType.Length))
{
throw new ArgumentException(SR.GetString("MediaTypeInvalid"), "mediaType");
}
}
catch (FormatException)
{
throw new ArgumentException(SR.GetString("MediaTypeInvalid"), "mediaType");
}
ContentType contentType = new ContentType(mediaType);
if (encoding == null)
{
if (MimeBasePart.IsAscii(contentString, false))
{
encoding = Encoding.ASCII;
}
else
{
encoding = Encoding.GetEncoding("utf-8");
}
}
contentType.CharSet = encoding.BodyName();
byte[] bytes = encoding.GetBytes(contentString);
this.part.SetContent(new MemoryStream(bytes), contentType);
if (MimeBasePart.ShouldUseBase64Encoding(encoding))
{
this.part.TransferEncoding = TransferEncoding.Base64;
}
else
{
this.part.TransferEncoding = TransferEncoding.QuotedPrintable;
}
}
internal static string EncodeHeaderValue(string value, Encoding encoding, bool base64Encoding)
{
StringBuilder builder = new StringBuilder();
if ((encoding == null) && IsAscii(value, false))
{
return(value);
}
if (encoding == null)
{
encoding = Encoding.GetEncoding("utf-8");
}
string bodyName = encoding.BodyName();
if (encoding == Encoding.BigEndianUnicode)
{
bodyName = "utf-16be";
}
builder.Append("=?");
builder.Append(bodyName);
builder.Append("?");
builder.Append(base64Encoding ? "B" : "Q");
builder.Append("?");
byte[] bytes = encoding.GetBytes(value);
if (base64Encoding)
{
Base64Stream stream = new Base64Stream(-1);
stream.EncodeBytes(bytes, 0, bytes.Length, true);
builder.Append(Encoding.ASCII.GetString(stream.WriteState.Buffer, 0, stream.WriteState.Length));
}
else
{
QuotedPrintableStream stream2 = new QuotedPrintableStream(-1);
stream2.EncodeBytes(bytes, 0, bytes.Length);
builder.Append(Encoding.ASCII.GetString(stream2.WriteState.Buffer, 0, stream2.WriteState.Length));
}
builder.Append("?=");
return(builder.ToString());
}