FTP Offset larger than file.

[Hrvoje Niksic]

Bakes <bakes at ymail.com> writes:

> The error I get is:
> ftplib.error_temp: 451-Restart offset 24576 is too large for file size
> 22852.
> 451 Restart offset reset to 0
> which tells me that the local file is larger than the external file,
> by about a kilobyte. Certainly, the local file is indeed that size, so
> my local script is doing the right things. I do wonder what is going
> wrong, can anyone enlighten me?

I'd say you failed to take buffering into account.  You write into a
buffered file, yet you use os.path.getsize() to find out the current
file size.  If the data is not yet flushed, you keep re-reading the same
stuff from the remote file, and writing it out.  Once the buffer is
flushed, your file will contain more data than was retrieved from the
remote side, and eventually this will result in the error you see.

As a quick fix, you can add a file.flush() line after the
file.write(...) line, and the problem should go away.