2.4.1.2 X-FileID

X-FileID

Optional. Contains the ID of the file created/overwritten on the server as a result of the upload request.
Present in requests with the following upload actions: Upload file, Upload file first chunk, Upload file middle chunk, Upload file last chunk, Delete file.
For the “Upload file” action, in case the upload request contains more than one file, this header field will return the ID of the last file of the set.