/// <summary>
/// Decode the given stream into a collection of parts.
/// </summary>
/// <returns></returns>
public ITransmissionPartCollection Decode(string name, Stream stream, string mimeType, string id = null) {
ParameterCheck.ParameterRequired(stream, "stream");
ParameterCheck.StringRequiredAndNotWhitespace(mimeType, "mimeType");
var transmissionPartCollection = new TransmissionPartCollection();
try {
int nextContentId = 1;
var mime = new Mime(stream);
Console.WriteLine("Parts " + mime.NumParts);
logger.DebugFormat("Parts {0}", mime.NumParts);
for (int partIndex = 0; partIndex < mime.NumParts; partIndex++) {
Mime mimePart = mime.GetPart(partIndex);
string contentId = mimePart.GetHeaderField("Content-id");
if (contentId.Trim().Length == 0) {
var sb = new StringBuilder();
sb.Append("OAIPART_"); //TODO determine better name for mime part than OAIPART_
sb.Append(DateTime.Now.Ticks.ToString());
sb.Append("_");
sb.Append(nextContentId.ToString());
contentId = sb.ToString();
nextContentId++;
}
string contentType = mimePart.ContentType;
//content type may contain ;char-encoding. Strip it off if found.
if (contentType != null) {
contentType = contentType.NormalizeContentType();
}
//TODO We need better way to get a BodyStream from a MimePart.
transmissionPartCollection.Add(transmissionPartFactory.CreateTransmissionPart(name,
new MemoryStream(mimePart.GetBodyBinary()),
contentType, contentId));
}
}
catch (Exception err) {
logger.Error(Messages.MimeEncoding_Decode_GeneralDecodingError, err);
throw new JdfException(Messages.MimeEncoding_Decode_GeneralDecodingError, err);
}
if (transmissionPartCollection.Count == 0) {
logger.Error(Messages.MimeEncoding_Decode_NoMessagePartsToDecode);
throw new JdfException(Messages.MimeEncoding_Decode_NoMessagePartsToDecode);
}
return transmissionPartCollection;
}
/// <summary>
/// Remove the given Mime from the collection.
/// </summary>
/// <param name="part">The part to remove.</param>
public void Remove(Mime part)
{
_parts.Remove(part);
}
/// <summary>
/// Add a mime message.
/// </summary>
/// <param name="part">The part to add.</param>
/// <returns>The newly added part.</returns>
public Mime Add(Mime part)
{
_parts.Add(part);
return part;
}
/// <summary>
/// Encode a set of transmission parts into a stream suitable for
/// transmission with or without Binary-Encoding Attachment.
/// </summary>
/// <param name="parts">The parts to encode.</param>
/// <param name="contentType">The MIME Type of the TransmissionPartCollection contents.</param>
/// <param name="withBinaryEncodingAttachment">if true, save all Attachments with binary-encoding type. </param>
/// <returns>An OptimalEncodingResult with the stream and the name of the backing file store if there is one.</returns>
EncodingResult OptimalEncode(ITransmissionPartCollection parts, out string contentType, bool withBinaryEncodingAttachment) {
using (var mime = new Mime()) {
mime.NewMultipartRelated();
foreach (ITransmissionPart part in parts) {
var mimePart = new Mime();
mimePart.SetHeaderField("Content-ID", part.Id);
//TODO optimize call to get the bytes from the stream
byte[] data = null;
using (var partStream = part.CopyOfStream()) {
using (var sr = new BinaryReader(partStream)) {
data = sr.ReadBytes((int)partStream.Length);
}
}
//TODO determine if this is how we should handle it.
if (!part.MimeType.Equals(MimeTypeHelper.JdfMimeType)
&& !part.MimeType.Equals(MimeTypeHelper.JmfMimeType)
&& !part.MimeType.StartsWith("text/")) {
//for text and jdf/jmf documents, do not base64 encode them.
mimePart.EncodingType = Mime.MimeEncoding.Base64;
}
else {
mimePart.EncodingType = Mime.MimeEncoding.Binary;
}
mimePart.SetBodyFromBinary(data);
mimePart.ContentType = part.MimeType;
mime.AppendPart(mimePart);
}
contentType = mime.ContentType;
mime.CreateDefaultType();
//TODO see if there is a more optimal way to get the stream from the mime.
return new EncodingResult(mime.GetMimeStream(), contentType);
}
}
/// <summary>
/// Append the given part to the body
/// </summary>
/// <param name="part"></param>
public void AppendPart(Mime part)
{
_mimes.Add(part);
}
/// <summary>
/// Add child message
/// </summary>
/// <param name="childMime"></param>
public void Add(Mime childMime)
{
_mimes.Add(childMime);
}
/// <summary>
/// Parsing mime from stream
/// </summary>
/// <param name="mp"></param>
/// <param name="isChildMime"></param>
private void Parse(ref MimeParser mp, bool isChildMime)
{
try
{
string sLine = "";
byte [] buffer = null;
bool isEOC = false;
bool readBinaryBody = false;
//Read line by line
//if line is null, end of file is detected.
while(sLine != null)
{
if (isChildMime && _headers["content-type"] != null && _headers["content-type"].Value != "multipart/related")
{
readBinaryBody = true;
}
//Read next chunk
//Usually the next line except for reading binary body.
//Reading binary body will read until the boundary is found
MimeParser.ChunkType chunkType = mp.ReadNextChunk(ref sLine, ref isEOC, ref readBinaryBody, ref buffer);
//perform task based on the chunk type
switch (chunkType)
{
case MimeParser.ChunkType.VersionHeader:
case MimeParser.ChunkType.Header:
MimeHeader mh = new MimeHeader(sLine);
InitializeMultipart(ref mp, mh);
_headers.Add(mh);
break;
case MimeParser.ChunkType.Body:
CreateBody(sLine, buffer);
//Check if the next line is the boundary of this child mime
if (isChildMime && !_isMultiPart)
return;
break;
case MimeParser.ChunkType.StartBoundary:
case MimeParser.ChunkType.Boundary:
Mime childMessage = new Mime(ref mp, true);
_mimes.Add(childMessage);
break;
case MimeParser.ChunkType.EndBoundary:
return;
case MimeParser.ChunkType.EOF:
break;
default:
break;
}
}
}
catch(Exception err)
{
logger.Error(err);
throw;
}
}