posting a binary file fails, binary message not understood

[jmari]

posting a binary file doing:

response := ZnClient new
ifFail:[ :ex | self dataLoadFailed: ex ];
headerAt:'x-api-key' put: self apiKey;
addPart: (ZnMimePart fieldName: #file fileNamed: aFileName );
url: self url, self apiUrlFileUpload;
post;
response.

Fails, giving message #binary not understood. Solved doing
....

mimeType isBinary ifTrue: [ fileStream := fileStream wrappedStream ].

....

fieldName: fieldName fileNamed: fileName
| mimeType size fileStream entity baseName |
mimeType := ZnMimeType forFilenameExtension: (ZnFileSystemUtils extensionFor: fileName).
fileStream := ZnFileSystemUtils oldFileStreamFor: fileName.
mimeType isBinary ifTrue: [ fileStream binary ].
size := ZnFileSystemUtils fileSizeFor: fileName.
(entity := ZnStreamingEntity type: mimeType length: size)
stream: fileStream.
baseName := ZnFileSystemUtils baseNameFor: fileName.
^ self fieldName: fieldName fileName: baseName entity: entity

[jmari]

Sorry it is an older versión