Python ftplib - retrbinary fails with timeout for zero byte files

Question

Using Python 2.6 and downloading files from an FTP server in passive mode, I found that retrbinary fails with a timeout if the source file is empty (0 bytes). Is this a bug or am I missing a configuration option?

ftp.retrbinary('RETR digital.conf', open('digital.conf','wb').write)

Downloading digital.conf
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "download.py", line 13, in run
    ftp.retrbinary('RETR %s' % source, callback)
  File "c:\Python26\lib\ftplib.py", line 398, in retrbinary
    conn = self.transfercmd(cmd, rest)
  File "c:\Python26\lib\ftplib.py", line 360, in transfercmd
    return self.ntransfercmd(cmd, rest)[0]
  File "c:\Python26\lib\ftplib.py", line 337, in ntransfercmd
    resp = self.getresp()
  File "c:\Python26\lib\ftplib.py", line 216, in getresp
    raise error_temp, resp
ftplib.error_temp: 421 Timeout

Other non-zero byte files transfer fine.

Are you able to fetch the file with a normal FTP client? – Wooble May 21 '12 at 10:28 — Wooble, May 21 '12 at 10:28
@Wobble, yes filezilla, for example, handles it fine. – Bruce Alport May 21 '12 at 10:37 — Bruce Alport, May 21 '12 at 10:37

score 0 · Answer 1 · answered Sep 18 '13 at 03:35

0

This is Your session idle time too long.You can file after the President into instantiate ftplib. Otherwise. Modify ftp software configuration.

For example, you use vsftpd, you can add the following configuration to vsftpd.conf:

idle_session_timeout=60000 # The default is 600 seconds

answered Sep 18 '13 at 03:35

dongweiming

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Did you understand your own answer? – Megan Caithlyn Sep 01 '15 at 16:59

Python ftplib - retrbinary fails with timeout for zero byte files

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