internal static Bodypart BodypartFromMIME(MIMEPart mimePart)
{
NameValueCollection contentType = ParseMIMEField(mimePart.Header["Content-Type"]);
Bodypart p = new Bodypart(null);
Match m = Regex.Match(contentType["value"], "(.+)/(.+)");
if (m.Success)
{
p.ContentType = ContentTypeMap.FromString(m.Groups[1].Value);
p.Subtype = m.Groups[2].Value;
}
p.Encoding = ContentTransferEncodingMap.FromString(mimePart.Header["Content-Transfer-Encoding"]);
p.Id = mimePart.Header["Content-Id"];
foreach (string k in contentType.AllKeys)
{
p.Parameters.Add(k, contentType[k]);
}
p.Size = mimePart.Body.Length;
if (mimePart.Header["Content-Disposition"] != null)
{
NameValueCollection disposition = ParseMIMEField(mimePart.Header["Content-Disposition"]);
p.Disposition.ContentType = ContentDispositionTypeMap.FromString(disposition["value"]);
p.Disposition.FileName = disposition["FileName"];
foreach (string k in disposition.AllKeys)
{
p.Disposition.Attributes.Add(k, disposition[k]);
}
}
return p;
}
private Bodypart ParseBodypart(string partNumber, bool parenthesis = true)
{
Bodypart part = new Bodypart(partNumber);
part.ContentType = ContentTypeMap.FromString(reader.ReadWord());
part.Subtype = reader.ReadWord();
part.Parameters = reader.ReadList();
part.Id = reader.ReadWord();
part.Description = reader.ReadWord();
part.Encoding = ContentTransferEncodingMap.FromString(reader.ReadWord());
part.Size = reader.ReadInteger();
if (part.ContentType == ContentType.Text)
{
part.Lines = reader.ReadInteger();
}
if (part.ContentType == ContentType.Message && part.Subtype.ToUpper() == "RFC822")
{
ParseMessage822Fields(part);
}
try
{
ParseOptionalFields(part, parenthesis);
}
catch (EndOfStringException)
{
}
return part;
}
internal static void AddBodypart(this MailMessage message, Bodypart part, string content)
{
Encoding encoding = part.Parameters.ContainsKey("Charset") ? Util.GetEncoding(part.Parameters["Charset"]) : Encoding.ASCII;
byte[] bytes;
try
{
switch (part.Encoding)
{
case ContentTransferEncoding.QuotedPrintable:
bytes = encoding.GetBytes(Util.QPDecode(content, encoding));
break;
case ContentTransferEncoding.Base64:
bytes = Util.Base64Decode(content);
break;
default:
bytes = Encoding.ASCII.GetBytes(content);
break;
}
}
catch
{
bytes = Encoding.ASCII.GetBytes(content);
}
bool hasName = part.Parameters.ContainsKey("name");
if (string.IsNullOrEmpty(message.Body) && part.Disposition.ContentType != ContentDispositionType.Attachment)
{
message.Body = encoding.GetString(bytes);
message.BodyEncoding = encoding;
message.IsBodyHtml = part.Subtype.ToLower() == "html";
return;
}
string contentType = ParseMIMEField(message.Headers["Content-Type"])["value"];
bool preferAlternative = string.Compare(contentType, "multipart/alternative", true) == 0;
if (part.Disposition.ContentType == ContentDispositionType.Attachment || (part.Disposition.ContentType == ContentDispositionType.Unknown && preferAlternative == false && hasName))
{
message.Attachments.Add(CreateAttachment(part, bytes));
}
else
{
message.AlternateViews.Add(CreateAlternateView(part, bytes));
}
}
internal static AlternateView CreateAlternateView(Bodypart part, byte[] bytes)
{
MemoryStream stream = new MemoryStream(bytes);
System.Net.Mime.ContentType contentType;
try
{
contentType = new System.Net.Mime.ContentType(part.ContentType.ToString().ToLower() + "/" + part.Subtype.ToLower());
}
catch
{
contentType = new System.Net.Mime.ContentType();
}
AlternateView view = new AlternateView(stream, contentType);
try
{
view.ContentId = ParseMessageId(part.Id);
}
catch
{
}
return view;
}
internal static Attachment CreateAttachment(Bodypart part, byte[] bytes)
{
MemoryStream stream = new MemoryStream(bytes);
string name = part.Disposition.FileName;
if (string.IsNullOrEmpty(name) && part.Parameters.ContainsKey("name"))
{
name = part.Parameters["name"];
}
if (string.IsNullOrEmpty(name))
{
name = Path.GetRandomFileName();
}
Attachment attachment = new Attachment(stream, name);
try
{
attachment.ContentId = ParseMessageId(part.Id);
}
catch
{
}
try
{
attachment.ContentType = new System.Net.Mime.ContentType(part.ContentType.ToString().ToLower() + "/" + part.Subtype.ToLower());
}
catch
{
attachment.ContentType = new System.Net.Mime.ContentType();
}
attachment.Name = name;
attachment.ContentDisposition.FileName = name;
return attachment;
}
private void ParseOptionalFields(Bodypart part, bool parenthesis = true)
{
if (parenthesis && reader.Peek(true) == ')')
{
reader.Read();
return;
}
part.MD5 = reader.ReadWord();
if (parenthesis && reader.Peek(true) == ')')
{
reader.Read();
return;
}
part.Disposition = reader.ReadDisposition();
if (parenthesis && reader.Peek(true) == ')')
{
reader.Read();
return;
}
part.Language = reader.ReadWord();
if (parenthesis && reader.Peek(true) == ')')
{
reader.Read();
return;
}
part.Location = reader.ReadWord();
if (parenthesis)
{
reader.SkipUntil(')');
}
}
private void ParseMessage822Fields(Bodypart part)
{
SkipParenthesizedExpression();
SkipParenthesizedExpression();
part.Lines = reader.ReadInteger();
}
