When CURLOPT_RANGE is specified in the FTP protocol, does it ever write out-of-range data?

Hello everyone.

I am developing an application with FTP client functionality using libcurl.

In the application, I am trying to specify the retrieval range in
CURLOPT_RANGE and write
incoming data through CURLOPT_WRITEFUNCTION.

As far as I can tell, the callback to CURLOPT_WRITEFUNCTION doesn't seem to
pass over data outside the range specified by
CURLOPT_RANGE. Is this a coincidence? Or is it designed that way?

The CURLOPT_RANGE documentation states that the range specification may be
ignored by the HTTP protocol.
Since the FTP protocol does not have a range specification (end-of-range
specification) mechanism, we expect that the libcurl side is designed to
ignore out-of-range data.

What do you think?

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