python

sycamorex · 08-23-2008, 08:39 AM

Hi, I've been trying to write a short program that logs in to my NAS drive (ftp account), lists the contents of the /data/notes/ directory and downloads a file of my choice.

It works when I explicitly specify the file in the script,
eg.

Code:

file_to_download = s.retrbinary('RETR myfile.txt', open('myfile.txt', 'wb').write)

However, if I want to see the contents of the /data/notes directory first and then choose the right file to download it gives an error:

Code:

#! /usr/bin/env python

import ftplib


def nas():
    # connect to the ftp server
    s = ftplib.FTP('192.168.1.102', 'user', 'passwd')
    print "List of files"
    s.cwd("/DATA/temp/")
    files = s.dir()
    print files
    
    ask = raw_input("Choose the file to download: ")
    file_to_download = s.retrbinary('RETR ask', open('ask', 'wb').write)
    
    s.quit()

nas()

I tried to get rid of single quotes or replaced them with double quotes - but it doesn't work.

Thanks for any help

ghostdog74 · 08-23-2008, 09:56 AM

what kind of errors? did you manage to print the files?

ntubski · 08-23-2008, 10:00 AM

You need to understand the difference between variables and values.

Code:

>>> "a string" # double quotes are the same as single quotes
'a string'
>>> 'a string'
'a string'
>>> var='value of var'
>>> var
'value of var'
>>> 'var' # this is just another string
'var'

therefore

Code:

file_to_download = s.retrbinary('RETR ask', open(ask, 'wb').write)

no quotes

sycamorex · 08-23-2008, 10:34 AM

Thanks guys,

That's the error with single quotes

Code:

[xtd8865@localhost python_files]$ ./ser.py
List of files
drw-rw-rw-   1 user     group           0 Jun  9 00:15 .
drw-rw-rw-   1 user     group           0 Jun  9 00:15 ..
-rw-rw-rw-   1 user     group         230 Jun  9 00:17 secre
-r--r--r--   1 user     group          41 Jun  9 00:26 6a55w01d5
-r--r--r--   1 user     group        6714 Jun  9 00:26 _wget_
-r--r--r--   1 user     group          41 Jun  9 00:26 config_samba
-r--r--r--   1 user     group         756 Jun  9 00:26 defcom_key
-r--r--r--   1 user     group       13090 Jun  9 00:26 find_tutorial
-r--r--r--   1 user     group       17771 Jun  9 00:26 goth
-r--r--r--   1 user     group           0 Jun  9 00:26 koka
-r--r--r--   1 user     group        6493 Jun  9 00:26 nfs_howto
-r--r--r--   1 user     group        2134 Jun  9 00:26 nis
-r--r--r--   1 user     group       18622 Jun  9 00:26 sed2
-r--r--r--   1 user     group       19635 Jun  9 00:26 sed_notes
None
Choose the file to download: nis
Traceback (most recent call last):
  File "./ser.py", line 27, in <module>
    nas()
  File "./ser.py", line 15, in nas
    plik = s.retrbinary('RETR ask', open('ask', 'wb').write)
  File "/usr/lib/python2.5/ftplib.py", line 390, in retrbinary
    conn = self.transfercmd(cmd, rest)
  File "/usr/lib/python2.5/ftplib.py", line 356, in transfercmd
    return self.ntransfercmd(cmd, rest)[0]
  File "/usr/lib/python2.5/ftplib.py", line 327, in ntransfercmd
    resp = self.sendcmd(cmd)
  File "/usr/lib/python2.5/ftplib.py", line 241, in sendcmd
    return self.getresp()
  File "/usr/lib/python2.5/ftplib.py", line 216, in getresp
    raise error_perm, resp
ftplib.error_perm: 550 Requested action not taken.

that's what happens if I get rid of single quotes

Code:

[xtd8865@localhost python_files]$ ./ser.py
List of files
drw-rw-rw-   1 user     group           0 Jun  9 00:15 .
drw-rw-rw-   1 user     group           0 Jun  9 00:15 ..
-rw-rw-rw-   1 user     group         230 Jun  9 00:17 secre
-r--r--r--   1 user     group          41 Jun  9 00:26 6a55w01d5
-r--r--r--   1 user     group        6714 Jun  9 00:26 _wget_
-r--r--r--   1 user     group          41 Jun  9 00:26 config_samba
-r--r--r--   1 user     group         756 Jun  9 00:26 defcom_key
-r--r--r--   1 user     group       13090 Jun  9 00:26 find_tutorial
-r--r--r--   1 user     group       17771 Jun  9 00:26 goth
-r--r--r--   1 user     group           0 Jun  9 00:26 koka
-r--r--r--   1 user     group        6493 Jun  9 00:26 nfs_howto
-r--r--r--   1 user     group        2134 Jun  9 00:26 nis
-r--r--r--   1 user     group       18622 Jun  9 00:26 sed2
-r--r--r--   1 user     group       19635 Jun  9 00:26 sed_notes
None
Choose the file to download: nis
Traceback (most recent call last):
  File "./ser.py", line 27, in <module>
    nas()
  File "./ser.py", line 15, in nas
    plik = s.retrbinary('RETR ask', open(ask, 'wb').write)
  File "/usr/lib/python2.5/ftplib.py", line 390, in retrbinary
    conn = self.transfercmd(cmd, rest)
  File "/usr/lib/python2.5/ftplib.py", line 356, in transfercmd
    return self.ntransfercmd(cmd, rest)[0]
  File "/usr/lib/python2.5/ftplib.py", line 327, in ntransfercmd
    resp = self.sendcmd(cmd)
  File "/usr/lib/python2.5/ftplib.py", line 241, in sendcmd
    return self.getresp()
  File "/usr/lib/python2.5/ftplib.py", line 216, in getresp
    raise error_perm, resp
ftplib.error_perm: 550 Requested action not taken.

ghostdog74 · 08-23-2008, 10:57 AM

Quote:

Code:

s.retrbinary('RETR ask'

you are asking to retrieve the file "ask" instead, which does not exist. Still remember how to concatenate ?

sycamorex · 08-24-2008, 08:22 AM

hmm, I guess I still remember how to do it... or do I?

Code:

#! /usr/bin/env python
import ftplib
def nas():
    # connect to the ftp server
    s = ftplib.FTP('192.168.1.102', 'usr', 'pswd')
    print "List of files"
    s.cwd("/DATA/temp/")
    files = s.dir()
    print files
    
    ask = raw_input("Choose the file to download: ")
    file_to_download = s.retrbinary('RETR' + ask, open(ask, 'wb').write)
    s.quit()
nas()

Code:

...
Choose the file to download: nis
Traceback (most recent call last):
  File "./ser.py", line 27, in <module>
    nas()
  File "./ser.py", line 15, in nas
    file_to_download = s.retrbinary('RETR' + ask, open(ask, 'wb').write)
  File "/usr/lib/python2.5/ftplib.py", line 390, in retrbinary
    conn = self.transfercmd(cmd, rest)
  File "/usr/lib/python2.5/ftplib.py", line 356, in transfercmd
    return self.ntransfercmd(cmd, rest)[0]
  File "/usr/lib/python2.5/ftplib.py", line 327, in ntransfercmd
    resp = self.sendcmd(cmd)
  File "/usr/lib/python2.5/ftplib.py", line 241, in sendcmd
    return self.getresp()
  File "/usr/lib/python2.5/ftplib.py", line 216, in getresp
    raise error_perm, resp
ftplib.error_perm: 550 Requested action not taken.

Any hints?
thank you

sycamorex · 08-24-2008, 08:43 AM

There was no space in:
('RETR' +.....

It was supposed to be:
('RETR ' +....

thanks guys

andrapgm03 · 01-05-2011, 02:22 PM

use this code...hope usefull..

Code:

#!/usr/bin/env python

from ftplib import FTP
import getpass

def main():
        user=raw_input('user: ')
        passwd=getpass.getpass('passwordnya: ')
        ftp=FTP('122.200.6.124')
        ftp.login(user,passwd)

#       ret=ftp.rename('/home/andrewraharjo/welcom','/home/andrewraharjo/welcome,msg')
#       print ret

        ret=ftp.mkd('home/iniftp')
        print ret

        ret=ftp.rmd('/home/andrewraharjo/hapusini')
        print ret

        ftp.quit()

if __name__=='__main__':
        main()