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);
}
public void TestMultipartWriter()
{
const string expectedOutput = "\r\n--BOUNDARY\r\nContent-Length: 16\r\n\r\n<part the first>\r\n--BOUNDARY\r\nContent-Length: " +
"10\r\nContent-Type: something\r\n\r\n<2nd part>\r\n--BOUNDARY--";
for (var bufSize = 1; bufSize < expectedOutput.Length - 1; ++bufSize)
{
var mp = new MultipartWriter("foo/bar", "BOUNDARY");
Assert.AreEqual("foo/bar; boundary=\"BOUNDARY\"", mp.ContentType);
Assert.AreEqual("BOUNDARY", mp.Boundary);
mp.AddData(Encoding.UTF8.GetBytes("<part the first>"));
mp.SetNextPartHeaders(new Dictionary <string, string> {
{ "Content-Type", "something" }
});
mp.AddData(Encoding.UTF8.GetBytes("<2nd part>"));
Assert.AreEqual(expectedOutput.Length, mp.Length);
var output = mp.AllOutput();
Assert.IsNotNull(output);
Assert.AreEqual(expectedOutput, Encoding.UTF8.GetString(output.ToArray()));
mp.Close();
}
}
private static MultipartWriter MultipartWriterForRev(Database db, RevisionInternal rev, string contentType)
{
var writer = new MultipartWriter(contentType, null);
writer.SetNextPartHeaders(new Dictionary <string, string> {
{ "Content-Type", "application/json" }
});
writer.AddData(rev.GetBody().AsJson());
var attachments = rev.GetAttachments();
if (attachments == null)
{
return(writer);
}
foreach (var entry in attachments)
{
var attachment = entry.Value.AsDictionary <string, object>();
if (attachment != null && attachment.GetCast <bool>("follows", false))
{
var disposition = String.Format("attachment; filename={0}", Database.Quote(entry.Key));
writer.SetNextPartHeaders(new Dictionary <string, string> {
{ "Content-Disposition", disposition }
});
var attachObj = default(AttachmentInternal);
try {
attachObj = db.AttachmentForDict(attachment, entry.Key);
} catch (CouchbaseLiteException) {
return(null);
}
var fileURL = attachObj.ContentUrl;
if (fileURL != null)
{
writer.AddFileUrl(fileURL);
}
else
{
writer.AddStream(attachObj.ContentStream);
}
}
}
return(writer);
}
/// <summary>
/// Creates and sets a multipart writer given the list of data to send
/// </summary>
/// <param name="parts">The list of data to transmit</param>
/// <param name="type">The base type of the multipart writer</param>
public void SetMultipartBody(IList <object> parts, string type)
{
var mp = new MultipartWriter(type, null);
object nextPart;
foreach (var part in parts)
{
if (!(part is IEnumerable <byte>))
{
nextPart = Manager.GetObjectMapper().WriteValueAsBytes(part);
mp.SetNextPartHeaders(new Dictionary <string, string> {
{ "Content-Type", "application/json" }
});
}
else
{
nextPart = part;
}
mp.AddData((IEnumerable <byte>)nextPart);
}
MultipartWriter = mp;
}