Hi All
O'Reilly Book ISBN 978-986-6840-36-4.
python --version
Python 2.6.2 on AIX 5.3
Using this python to get files in ftp server.
I got below error. What is the error meaning and how to fix ?
ftp_mirror.py
Traceback (most recent call last):
File "/xx../shell/ftpmirror.py", line 80, in <module>
f = FTPSync(options.host, options.username, options.password,
options.remote_dir, options.local_dir, opti
ons.delete)
File "xx../shell/ftpmirror.py", line 17, in __init__
self.conn.cwd(ftp_base_dir)
File "/opt/freeware/lib/python2.6/ftplib.py", line 536, in cwd
cmd = 'CWD ' + dirname
TypeError: cannot concatenate 'str' and 'NoneType' objects
Source :
#!/usr/bin/env python
import ftplib
import os
class FTPSync(object):
def __init__(self, host, username, password, ftp_base_dir,
local_base_dir, delete=False):
self.host = host
self.username = username
self.password = password
self.ftp_base_dir = ftp_base_dir
self.local_base_dir = local_base_dir
self.delete = delete
self.conn = ftplib.FTP(host, username, password)
self.conn.cwd(ftp_base_dir)
try:
os.makedirs(local_base_dir)
except OSError:
pass
os.chdir(local_base_dir)
def get_dirs_files(self):
dir_res = []
self.conn.dir('.', dir_res.append)
files = [f.split(None, 8)[-1] for f in dir_res if
f.startswith('-')]
dirs = [f.split(None, 8)[-1] for f in dir_res if
f.startswith('d')]
return (files, dirs)
def walk(self, next_dir):
print "Walking to", next_dir
self.conn.cwd(next_dir)
try:
os.mkdir(next_dir)
except OSError:
pass
os.chdir(next_dir)
ftp_curr_dir = self.conn.pwd()
local_curr_dir = os.getcwd()
files, dirs = self.get_dirs_files()
print "FILES:", files
print "DIRS:", dirs
for f in files:
print next_dir, ':', f
outf = open(f, 'wb')
try:
self.conn.retrbinary('RETR %s' % f, outf.write)
finally:
outf.close()
if self.delete:
print "Deleting", f
self.conn.delete(f)
for d in dirs:
os.chdir(local_curr_dir)
self.conn.cwd(ftp_curr_dir)
self.walk(d)
def run(self):
self.walk('.')
if __name__ == '__main__':
from optparse import OptionParser
parser = OptionParser()
parser.add_option("-o", "--host", dest="host",
action='store', help="FTP host")
parser.add_option("-u", "--username", dest="username",
action='store', help="FTP username")
parser.add_option("-p", "--password", dest="password",
action='store', help="FTP password")
parser.add_option("-r", "--remote_dir", dest="remote_dir",
action='store', help="FTP remote starting directory")
parser.add_option("-l", "--local_dir", dest="local_dir",
action='store', help="Local starting directory")
parser.add_option("-d", "--delete", dest="delete", default=False,
action='store_true', help="use regex parser")
(options, args) = parser.parse_args()
f = FTPSync(options.host, options.username, options.password,
options.remote_dir, options.local_dir, options.delete)
f.run()
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