Use this command to transfer a file to the server. The request must be a multipart POST request and only one file is uploaded per request. A file is a required part of the multipart request, but any parameter name given to the file part is ignored.
You must provide the fileserver username and password for basic authorization.
The response includes the following parameters:
to: The relative or absolute path of the destination file.
append: Optional. If the file exists on the target directory, set this parameter to
to append the new file to the existing one.
transferMode: Use B for binary transfers or A for ascii transfers. Default is B.
file: The file being uploaded as part of the multipart request.