fileuploader dispatch rule is used to upload parts of a file.
name is provided by the
model/fileuploader/post/new method and uniquely
identifies the file being uploaded.
offset=... query argument provides the start point of the
uploaded segment in the file. The size of the segment is derived from the uploaded
The body should be of
application/octet-stream type with binary data.
The result is a JSON, describing the current status of the uploaded file.