/// <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));
}
}
}
/// <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 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>
/// 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);
}
/// <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);
}