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I have a FTP server but I would like to use the resume option to restart an upload in case the connection is lost.

Can FTP do this?

If not is there a file transfer protocol that allows to do such a thing..?


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up vote 0 down vote accepted

Your FTP client should support resume transfer. I prefer FileZilla.

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Yes but it seems that the files get corrupted every time i try to resume my upload any comment on that? – Necronet Oct 29 '10 at 16:26
What happens if the file to be retrieved changes between the resumes? – mdpc Oct 29 '10 at 16:29
In these type of cases, I have sometimes found that my firewall software has causes file corruption. You might was to try running the upload w/o the firewall being active. – mdpc Oct 29 '10 at 16:30
Any other server that allows uploading resume or just FTP – Necronet Oct 29 '10 at 19:23

You'll need both a server and a client that supports REST (restart) and SIZE which are defined in RFC-3659. The server should respond to a FEAT command with REST STREAM.

Ideally the client and server would support MDTM which reports the modification time of a file on the server so the client can decide if the file has been modified since it started transferring.

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More specifically, the server does not have the ability to resume a broken file transfer connection. However, depending on the FTP client being used (not all do this), a resume capability can be implemented in that code.

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For something completely different, you could try rsync instead of FTP (assuming you can install it at both client and server and you control any firewalls)

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