private MultipartWriter GetMultipartWriter(RevisionInternal rev, string boundary)
{
// Find all the attachments with "follows" instead of a body, and put 'em in a multipart stream.
// It's important to scan the _attachments entries in the same order in which they will appear
// in the JSON, because CouchDB expects the MIME bodies to appear in that same order
var bodyStream = default(MultipartWriter);
var attachments = rev.GetAttachments();
foreach (var a in attachments)
{
var attachment = a.Value.AsDictionary <string, object>();
if (attachment != null && attachment.GetCast <bool>("follows"))
{
if (bodyStream == null)
{
// Create the HTTP multipart stream:
bodyStream = new MultipartWriter("multipart/related", boundary);
bodyStream.SetNextPartHeaders(new Dictionary <string, string> {
{ "Content-Type", "application/json" }
});
// Use canonical JSON encoder so that _attachments keys will be written in the
// same order that this for loop is processing the attachments.
var json = Manager.GetObjectMapper().WriteValueAsBytes(rev.GetProperties(), true);
if (CanSendCompressedRequests)
{
bodyStream.AddGZippedData(json);
}
else
{
bodyStream.AddData(json);
}
}
// Add attachment as another MIME part:
var disposition = String.Format("attachment; filename={0}", Misc.QuoteString(a.Key));
var contentType = attachment.GetCast <string>("type");
var contentEncoding = attachment.GetCast <string>("encoding");
bodyStream.SetNextPartHeaders(new NonNullDictionary <string, string> {
{ "Content-Disposition", disposition },
{ "Content-Type", contentType },
{ "Content-Encoding", contentEncoding }
});
var attachmentObj = default(AttachmentInternal);
try {
attachmentObj = LocalDatabase.AttachmentForDict(attachment, a.Key);
} catch (CouchbaseLiteException) {
return(null);
}
bodyStream.AddStream(attachmentObj.ContentStream, attachmentObj.Length);
}
}
return(bodyStream);
}