> FTP has a command to instruct the server where to start reading from, and then curl stops reading at the end of the range.
Thanks for the reply. I see that curl will process to the specified RANGE before passing it to WRITEFUNCTION. I will implement it with that expectation. 2025年8月8日(金) 0:27 Daniel Stenberg <dan...@haxx.se>: > 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 >
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