FTP with CURLOPT_NOBODY different behavior when performing onnon-existing files #5953

From: Lukas Friembichler via curl-library <curl-library_at_cool.haxx.se>
Date: Tue, 15 Dec 2020 16:00:10 +0100

Hi all,

I have run into a problem when updating to the most recent CURL release
(7_74, I was on 7_70 before) - it seems I can no longer rename
directories on my ftp server, I suspect due to issue #5953

Basically, what I'm doing is to upload a few files into a temporary
folder on my FTP, then, once everything has been successfully uploaded,
rename the folder using a CURLOPT_QUOTE call. This used to work fine but
now I get a 550 error, aborting the execution of my command queue.

My quote commands are
[0] = "RNFR upload_81813aad-24c4-47b2-af23-4fc75ed60db5"
[1] = "RNTO 81813aad-24c4-47b2-af23-4fc75ed60db5"

(ie basically remove the 'upload_' string from the directory name), and
verbose CURL logs out the following:

* STATE: CONNECT => DO handle 0x24313c0; line 1708 (connection #0)
* DO phase starts
> CWD /
* FTP 0x244d070 (line 875) state change from STOP to CWD
* ftp_perform ends with SECONDARY: 0
* STATE: DO => DOING handle 0x24313c0; line 1927 (connection #0)
< 250 Directory successfully changed.
> SIZE upload_81813aad-24c4-47b2-af23-4fc75ed60db5
* FTP 0x244d070 (line 1412) state change from CWD to SIZE
< 550 Could not get file size.
* The file does not exist
* DO phase failed
* multi_done
* Remembering we are in dir ""

Below I quote the output when using 7_70:

* STATE: CONNECT => DO handle 0x233b7e0; line 1672 (connection #0)
* DO phase starts
> CWD /
* FTP 0x2347220 (line 880) state change from STOP to CWD
* ftp_perform ends with SECONDARY: 0
* STATE: DO => DOING handle 0x233b7e0; line 1875 (connection #0)
< 250 Directory successfully changed.
> SIZE upload_81813aad-24c4-47b2-af23-4fc75ed60db5
* FTP 0x2347220 (line 1413) state change from CWD to SIZE
< 550 Could not get file size.
> REST 0
* FTP 0x2347220 (line 1393) state change from SIZE to REST
< 350 Restart position accepted (0).
Accept-ranges: bytes
* FTP 0x2347220 (line 1347) state change from REST to RETR_PREQUOTE
* FTP 0x2347220 (line 1721) state change from RETR_PREQUOTE to STOP
* DO phase is complete2
* STATE: DOING => DO_DONE handle 0x233b7e0; line 1959 (connection #0)
* STATE: DO_DONE => DONE handle 0x233b7e0; line 2017 (connection #0)
* multi_done
* Remembering we are in dir ""
> RNFR upload_81813aad-24c4-47b2-af23-4fc75ed60db5
< 350 Ready for RNTO.
> RNTO 81813aad-24c4-47b2-af23-4fc75ed60db5
< 250 Rename successful.

I confess that I'm not a FTP guru by any means, so is my approach simply
invalid and should I do something else? Or is this indeed an unwanted
side effect of treating 550 as an error now?

I would be grateful for any pointers, I can of course provide more
information if needed!

Thank you,
Lukas
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Received on 2020-12-15