/// <summary>
/// Glue method to create a bodypart from a MIMEPart instance.
/// </summary>
/// <param name="mimePart">The MIMEPart instance to create the bodypart instance from.</param>
/// <returns>An initialized instance of the Bodypart class.</returns>
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.Type = 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.Type = ContentDispositionTypeMap.fromString(
disposition["value"]);
p.Disposition.Filename = disposition["Filename"];
foreach (string k in disposition.AllKeys)
{
p.Disposition.Attributes.Add(k, disposition[k]);
}
}
return(p);
}
/// <summary>
/// Parses the body of a multipart MIME mail message.
/// </summary>
/// <param name="reader">An instance of the StringReader class initialized with a string
/// containing the body of the mail message.</param>
/// <param name="boundary">The boundary value as is present as part of the Content-Type header
/// field in multipart mail messages.</param>
/// <returns>An array of initialized MIMEPart instances representing the various parts of the
/// MIME mail message.</returns>
static MIMEPart[] ParseMIMEParts(StringReader reader, string boundary)
{
List <MIMEPart> list = new List <MIMEPart>();
string start = "--" + boundary, end = "--" + boundary + "--", line;
// Skip everything up to the first boundary.
while ((line = reader.ReadLine()) != null)
{
if (line.StartsWith(start))
{
break;
}
}
// Read the MIME parts which are delimited by boundary strings.
while (line != null && line.StartsWith(start))
{
MIMEPart p = new MIMEPart();
// Read the part header.
StringBuilder header = new StringBuilder();
while (!String.IsNullOrEmpty(line = reader.ReadLine()))
{
header.AppendLine(line);
}
p.header = ParseMailHeader(header.ToString());
// Account for nested multipart content.
NameValueCollection contentType = ParseMIMEField(p.header["Content-Type"]);
if (contentType["Boundary"] != null)
{
list.AddRange(ParseMIMEParts(reader, contentType["boundary"]));
}
// Read the part body.
StringBuilder body = new StringBuilder();
while ((line = reader.ReadLine()) != null)
{
if (line.StartsWith(start))
{
break;
}
body.AppendLine(line);
}
p.body = body.ToString();
// Add the MIME part to the list unless body is null or empty which means the body
// contained nested multipart content.
if (p.body != null && p.body.Trim() != String.Empty)
{
list.Add(p);
}
// If this boundary is the end boundary, we're done.
if (line == null || line.StartsWith(end))
{
break;
}
}
return(list.ToArray());
}
