private void BuildMultiPartMessage(MimeEntity entity, MailMessageEx message)
{
foreach (MimeEntity entity2 in entity.Children)
{
if (entity2 == null)
{
continue;
}
if (string.Equals(entity2.ContentType.MediaType, MediaTypes.MultipartAlternative, StringComparison.InvariantCultureIgnoreCase) || string.Equals(entity2.ContentType.MediaType, MediaTypes.MultipartMixed, StringComparison.InvariantCultureIgnoreCase))
{
this.BuildMultiPartMessage(entity2, message);
continue;
}
if (!IsAttachment(entity2) && (string.Equals(entity2.ContentType.MediaType, MediaTypes.TextPlain) || string.Equals(entity2.ContentType.MediaType, MediaTypes.TextHtml)))
{
message.AlternateViews.Add(this.CreateAlternateView(entity2));
this.SetMessageBody(message, entity2);
continue;
}
if (string.Equals(entity2.ContentType.MediaType, MediaTypes.MessageRfc822, StringComparison.InvariantCultureIgnoreCase) && string.Equals(entity2.ContentDisposition.DispositionType, "attachment", StringComparison.InvariantCultureIgnoreCase))
{
message.Children.Add(this.ToMailMessageEx(entity2));
}
else if (IsAttachment(entity2))
{
message.Attachments.Add(this.CreateAttachment(entity2));
}
}
}
/// <summary>
/// Initializes a new instance of the <see cref="MimeEntity"/> class.
/// </summary>
public MimeEntity()
{
_children = new List<MimeEntity>();
_headers = new NameValueCollection();
_contentType = MimeReader.GetContentType(string.Empty);
_parent = null;
_encodedMessage = new StringBuilder();
}
public MimeEntity(MimeEntity parent) : this()
{
if (parent == null)
{
throw new ArgumentNullException("parent");
}
this._parent = parent;
this._startBoundary = parent.StartBoundary;
}
private MimeReader(MimeEntity entity, Queue<string> lines) : this()
{
if (entity == null)
{
throw new ArgumentNullException("entity");
}
if (lines == null)
{
throw new ArgumentNullException("lines");
}
this._lines = lines;
this._entity = new MimeEntity(entity);
}
/// <summary>
/// Sets the message body.
/// </summary>
/// <param name="message">The message.</param>
/// <param name="child">The child.</param>
private void SetMessageBody(MailMessageEx message, MimeEntity child)
{
Encoding encoding = child.GetEncoding();
message.Body = DecodeBytes(child.Content.ToArray(), encoding);
message.BodyEncoding = encoding;
message.IsBodyHtml = string.Equals(MediaTypes.TextHtml,
child.ContentType.MediaType, StringComparison.InvariantCultureIgnoreCase);
}
/// <summary>
/// Creates the attachment.
/// </summary>
/// <param name="entity">The entity.</param>
/// <returns></returns>
private Attachment CreateAttachment(MimeEntity entity)
{
Attachment attachment = new Attachment(entity.Content, entity.ContentType);
if (entity.ContentDisposition != null)
{
attachment.ContentDisposition.Parameters.Clear();
foreach (string key in entity.ContentDisposition.Parameters.Keys)
{
attachment.ContentDisposition.Parameters.Add(key, entity.ContentDisposition.Parameters[key]);
}
attachment.ContentDisposition.CreationDate = entity.ContentDisposition.CreationDate;
attachment.ContentDisposition.DispositionType = entity.ContentDisposition.DispositionType;
attachment.ContentDisposition.FileName = entity.ContentDisposition.FileName;
attachment.ContentDisposition.Inline = entity.ContentDisposition.Inline;
attachment.ContentDisposition.ModificationDate = entity.ContentDisposition.ModificationDate;
attachment.ContentDisposition.ReadDate = entity.ContentDisposition.ReadDate;
attachment.ContentDisposition.Size = entity.ContentDisposition.Size;
}
if (!string.IsNullOrEmpty(entity.ContentId))
{
attachment.ContentId = TrimBrackets(entity.ContentId);
}
attachment.TransferEncoding = entity.ContentTransferEncoding;
return attachment;
}
/// <summary>
/// Creates the alternate view.
/// </summary>
/// <param name="view">The view.</param>
/// <returns></returns>
private AlternateView CreateAlternateView(MimeEntity view)
{
AlternateView alternateView = new AlternateView(view.Content, view.ContentType);
alternateView.TransferEncoding = view.ContentTransferEncoding;
alternateView.ContentId = TrimBrackets(view.ContentId);
return alternateView;
}
/// <summary>
/// Builds the single part message.
/// </summary>
/// <param name="entity">The entity.</param>
/// <param name="message">The message.</param>
private void BuildSinglePartMessage(MimeEntity entity, MailMessageEx message)
{
SetMessageBody(message, entity);
}
private static bool IsAttachment(MimeEntity child)
{
return(child.ContentDisposition != null && string.Equals(child.ContentDisposition.DispositionType, "attachment", StringComparison.InvariantCultureIgnoreCase));
}
/// <summary>
/// Creates the mail message from entity.
/// </summary>
/// <param name="entity">The entity.</param>
/// <returns></returns>
public static MailMessageEx CreateMailMessageFromEntity(MimeEntity entity)
{
MailMessageEx message = new MailMessageEx();
string value;
foreach (string key in entity.Headers.AllKeys)
{
value = entity.Headers[key];
if (value.Equals(string.Empty))
{
value = " ";
}
message.Headers.Add(key.ToLowerInvariant(), value);
switch (key.ToLowerInvariant())
{
case MailHeaders.Bcc:
MailMessageEx.PopulateAddressList(value, message.Bcc);
break;
case MailHeaders.Cc:
MailMessageEx.PopulateAddressList(value, message.CC);
break;
case MailHeaders.From:
message.From = MailMessageEx.CreateMailAddress(value);
break;
case MailHeaders.ReplyTo:
message.ReplyTo = MailMessageEx.CreateMailAddress(value);
break;
case MailHeaders.Subject:
message.Subject = value;
break;
case MailHeaders.To:
MailMessageEx.PopulateAddressList(value, message.To);
break;
}
}
return message;
}
/// <summary>
/// Adds the child entity.
/// </summary>
/// <param name="entity">The entity.</param>
private void AddChildEntity(MimeEntity entity, Queue<string> lines)
{
/*if (entity == null)
{
return;
}
if (lines == null)
{
return;
}*/
MimeReader reader = new MimeReader(entity, lines);
entity.Children.Add(reader.CreateMimeEntity());
}
private AlternateView CreateAlternateView(MimeEntity view)
{
return new AlternateView(view.Content, view.ContentType) { TransferEncoding = view.ContentTransferEncoding, ContentId = TrimBrackets(view.ContentId) };
}
private MailMessageEx ToMailMessageEx(MimeEntity entity)
{
if (entity == null)
{
return null;
}
MailMessageEx message = MailMessageEx.CreateMailMessageFromEntity(entity);
if (!string.IsNullOrEmpty(entity.ContentType.Boundary))
{
message = MailMessageEx.CreateMailMessageFromEntity(entity);
this.BuildMultiPartMessage(entity, message);
return message;
}
if (string.Equals(entity.ContentType.MediaType, MediaTypes.MessageRfc822, StringComparison.InvariantCultureIgnoreCase))
{
if (entity.Children.Count < 0)
{
throw new Pop3Exception("Invalid child count on message/rfc822 entity.");
}
message = MailMessageEx.CreateMailMessageFromEntity(entity.Children[0]);
this.BuildMultiPartMessage(entity, message);
return message;
}
message = MailMessageEx.CreateMailMessageFromEntity(entity);
this.BuildSinglePartMessage(entity, message);
return message;
}
/// <summary>
/// Toes the mail message ex.
/// </summary>
/// <param name="entity">The entity.</param>
/// <returns></returns>
private MailMessageEx ToMailMessageEx(MimeEntity entity)
{
if (entity == null)
{
//throw new ArgumentNullException("entity");
return null;
}
//parse standard headers and create base email.
MailMessageEx message = MailMessageEx.CreateMailMessageFromEntity(entity);
if (!string.IsNullOrEmpty(entity.ContentType.Boundary))
{
message = MailMessageEx.CreateMailMessageFromEntity(entity);
BuildMultiPartMessage(entity, message);
}//parse multipart message into sub parts.
else if (string.Equals(entity.ContentType.MediaType, MediaTypes.MessageRfc822, StringComparison.InvariantCultureIgnoreCase))
{
//use the first child to create the multipart message.
if (entity.Children.Count < 0)
{
throw new Pop3Exception("Invalid child count on message/rfc822 entity.");
}
//create the mail message from the first child because it will
//contain all of the mail headers. The entity in this state
//only contains simple content type headers indicating, disposition, type and description.
//This means we can't create the mail message from this type as there is no
//internet mail headers attached to this entity.
message = MailMessageEx.CreateMailMessageFromEntity(entity.Children[0]);
BuildMultiPartMessage(entity, message);
} //parse nested message.
else
{
message = MailMessageEx.CreateMailMessageFromEntity(entity);
BuildSinglePartMessage(entity, message);
} //Create single part message.
return message;
}
private static bool IsAttachment(MimeEntity child)
{
return (child.ContentDisposition != null)
&& (string.Equals(child.ContentDisposition.DispositionType, DispositionTypeNames.Attachment, StringComparison.InvariantCultureIgnoreCase));
}
private MimeReader()
{
this._entity = new MimeEntity();
}
/// <summary>
/// Builds the multi part message.
/// </summary>
/// <param name="entity">The entity.</param>
/// <param name="message">The message.</param>
private void BuildMultiPartMessage(MimeEntity entity, MailMessageEx message)
{
foreach (MimeEntity child in entity.Children)
{
if (child == null)
{
continue;
}
if (string.Equals(child.ContentType.MediaType, MediaTypes.MultipartAlternative, StringComparison.InvariantCultureIgnoreCase)
|| string.Equals(child.ContentType.MediaType, MediaTypes.MultipartMixed, StringComparison.InvariantCultureIgnoreCase))
{
BuildMultiPartMessage(child, message);
} //if the message is mulitpart/alternative or multipart/mixed then the entity will have children needing parsed.
else if (!IsAttachment(child) &&
(string.Equals(child.ContentType.MediaType, MediaTypes.TextPlain)
|| string.Equals(child.ContentType.MediaType, MediaTypes.TextHtml)))
{
message.AlternateViews.Add(CreateAlternateView(child));
SetMessageBody(message, child);
} //add the alternative views.
else if (string.Equals(child.ContentType.MediaType, MediaTypes.MessageRfc822, StringComparison.InvariantCultureIgnoreCase)
&& string.Equals(child.ContentDisposition.DispositionType, DispositionTypeNames.Attachment, StringComparison.InvariantCultureIgnoreCase))
{
message.Children.Add(ToMailMessageEx(child));
} //create a child message and
else if (IsAttachment(child))
{
message.Attachments.Add(CreateAttachment(child));
}
}
}
private void AddChildEntity(MimeEntity entity, Queue<string> lines)
{
MimeReader reader = new MimeReader(entity, lines);
entity.Children.Add(reader.CreateMimeEntity());
}
private void BuildSinglePartMessage(MimeEntity entity, MailMessageEx message)
{
this.SetMessageBody(message, entity);
}
