On 24/03/2021 14:45, Tomas Berger via curl-library wrote: > I have been trying to create a function that returns true > if a file exists or not on a TFTP server. I had a function > for this for SFTP/FTP using CURLOPT_NOBODY, and that has > been for those protocols. However, did not work for TFTP. > I have managed to make a function that checks if a file > exists on a TFTP server, I am just uncertain if this is > the right way to go about it. [snip] > I am just wondering if there is an easier way to do this > or if there is some CURLOPT for this? > Your approach seems reasonable to me. TFTP is very simple and doesn't have any way to enumerate files short of literally starting a transfer. You wouldn't be able to find out how large a file is until you'd finished receiving it, but if all you need to know is that it exists, then trying to receive /some/ data is fine.
Since TFTP is a lockstep protocol, the server won't send any blocks until the first one has been acknowledged. So, since you're aborting the transfer after the first block, you're not wasting any bandwidth with buffered data that then gets thrown away. I can't see any documented way to do this more directly with libcurl options, nor do I think that any need to be added. Cheers
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