catch exceptions that caused by connection error in ftplib

Question

I'm trying to upload lots of files using python's ftplib.
What kind of exception should I catch to be sure the problem is a connection error (so I can re-connect)?

Edit:
I tried all_errors in this scenario:

Connected to FTP server by ftplib and paused application (via debugger) before file upload
Closed connection via server
Resumed Application

With this code:

        try:        
            self.f.cwd(dest)
            return self.f.storbinary(('STOR '+n).encode('utf-8'), open(f,'rb'))
        except ftplib.all_errors as e:
            print e

exception caught but all_errors was empty:

e   EOFError:   
    args    tuple: ()   
    message str:

I don't understand what do you wanna tell us. So `ftplib.all_errors` worked but it was empty? — dav1d, Jan 13 '13 at 13:05
@dav1d: yes;(check my second edit); not always but most of times it has a empty tuple! (while it is caught!!) — Ariyan, Jan 13 '13 at 13:25
`e` is the instance of the error which is caught, it simply means no arguments were passed on initilization to the EOFError. That is nothing you have to care about. — dav1d, Jan 13 '13 at 16:21

score 2 · Accepted Answer · answered Jan 13 '13 at 12:42

2

You can look it up in the documentation: http://docs.python.org/2/library/ftplib.html#ftplib.error_reply

Also don't forget: http://docs.python.org/2/library/ftplib.html#ftplib.all_errors

answered Jan 13 '13 at 12:42

dav1d

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Adem Öztaş · Answer 2 · 2013-01-13T13:02:52.117

2

Try like this,

import socket
import ftplib

try:
    s = ftplib.FTP(server , user , password) 
except ftplib.all_errors as e:
    print "%s" % e

edited Jan 13 '13 at 13:02

answered Jan 13 '13 at 12:46

Adem Öztaş

20,457
4
34
42

score 2 · Answer 3 · answered Oct 30 '14 at 02:37

A simple way to catch exceptions both to and from a ftp server may be:

import ftplib, os

def from_ftp( server, path, data, filename = None ):
    '''Store the ftp data content to filename (anonymous only)'''
    if not filename:
        filename = os.path.basename( os.path.realpath(data) )

    try:
        ftp = ftplib.FTP( server )
        print( server + ' -> '+ ftp.login() )        
        print( server + ' -> '+ ftp.cwd(path) ) 
        with open(filename, 'wb') as out:
            print( server + ' -> '+ ftp.retrbinary( 'RETR ' + data, out.write ) ) 

    except ftplib.all_errors as e:
        print( 'Ftp fail -> ', e )
        return False

    return True

def to_ftp( server, path, file_input, file_output = None ):
    '''Store a file to ftp (anonymous only)'''
    if not file_output:
        file_output = os.path.basename( os.path.realpath(file_input) )

    try:
        ftp = ftplib.FTP( server )
        print( server + ' -> '+ ftp.login() )        
        print( server + ' -> '+ ftp.cwd(path) ) 
        with open( file_input, 'rb' ) as out:
            print( server + ' -> '+ ftp.storbinary( 'STOR ' + file_output, out ) ) 

    except ftplib.all_errors as e:
        print( 'Ftp fail -> ', e )
        return False

    return True

catch exceptions that caused by connection error in ftplib

3 Answers3