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When CURLOPT_RANGE is specified in the FTP protocol, does it ever write out-of-range data?
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From: Yoshimasa Ohno via curl-library <curl-library_at_lists.haxx.se>
Date: Thu, 7 Aug 2025 21:52:59 +0900
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?
Date: Thu, 7 Aug 2025 21:52:59 +0900
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?
-- Unsubscribe: https://lists.haxx.se/mailman/listinfo/curl-library Etiquette: https://curl.se/mail/etiquette.htmlReceived on 2025-08-07