Re: When CURLOPT_RANGE is specified in the FTP protocol, does it ever write out-of-range data?
Daniel Stenberg via curl-library <[email protected]>
| Newsgroups | gmane.comp.web.curl.library |
|---|---|
| Message-ID | <[email protected]> |
On Thu, 7 Aug 2025, Yoshimasa Ohno via curl-library wrote: > 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? It is designed that way. You ask for a range, you get that range. > 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. curl makes sure to deliver what the user asks for! FTP has a command to instruct the server where to start reading from, and then curl stops reading at the end of the range. Easy peacy! -- / daniel.haxx.se || https://rock-solid.curl.dev -- Unsubscribe: https://lists.haxx.se/mailman/listinfo/curl-library Etiquette: https://curl.se/mail/etiquette.html