"""An FTP client class and some helper functions.
Based on RFC 959: File Transfer Protocol (FTP), by J. Postel and J. Reynolds
>>> from ftplib import FTP
>>> ftp = FTP('ftp.python.org') # connect to host, default port
>>> ftp.login() # default, i.e.: user anonymous, passwd anonymous@
'230 Guest login ok, access restrictions apply.'
>>> ftp.retrlines('LIST') # list directory contents
drwxr-xr-x 8 root wheel 1024 Jan 3 1994 .
drwxr-xr-x 8 root wheel 1024 Jan 3 1994 ..
drwxr-xr-x 2 root wheel 1024 Jan 3 1994 bin
drwxr-xr-x 2 root wheel 1024 Jan 3 1994 etc
d-wxrwxr-x 2 ftp wheel 1024 Sep 5 13:43 incoming
drwxr-xr-x 2 root wheel 1024 Nov 17 1993 lib
drwxr-xr-x 6 1094 wheel 1024 Sep 13 19:07 pub
drwxr-xr-x 3 root wheel 1024 Jan 3 1994 usr
-rw-r--r-- 1 root root 312 Aug 1 1994 welcome.msg
A nice test that reveals some of the network dialogue would be:
python ftplib.py -d localhost -l -p -l
# Changes and improvements suggested by Steve Majewski.
# Modified by Jack to work on the mac.
# Modified by Siebren to support docstrings and PASV.
# Modified by Phil Schwartz to add storbinary and storlines callbacks.
# Modified by Giampaolo Rodola' to add TLS support.
from socket import _GLOBAL_DEFAULT_TIMEOUT
__all__ = ["FTP", "error_reply", "error_temp", "error_perm", "error_proto",
# Magic number from <socket.h>
MSG_OOB = 0x1 # Process data out of band
# The standard FTP server control port
# The sizehint parameter passed to readline() calls
# Exception raised when an error or invalid response is received
class Error(Exception): pass
class error_reply(Error): pass # unexpected [123]xx reply
class error_temp(Error): pass # 4xx errors
class error_perm(Error): pass # 5xx errors
class error_proto(Error): pass # response does not begin with [1-5]
# All exceptions (hopefully) that may be raised here and that aren't
# (always) programming errors on our side
all_errors = (Error, OSError, EOFError)
# Line terminators (we always output CRLF, but accept any of CRLF, CR, LF)
To create a connection, call the class using these arguments:
host, user, passwd, acct, timeout
The first four arguments are all strings, and have default value ''.
timeout must be numeric and defaults to None if not passed,
meaning that no timeout will be set on any ftp socket(s)
If a timeout is passed, then this is now the default timeout for all ftp
socket operations for this instance.
Then use self.connect() with optional host and port argument.
To download a file, use ftp.retrlines('RETR ' + filename),
or ftp.retrbinary() with slightly different arguments.
To upload a file, use ftp.storlines() or ftp.storbinary(),
which have an open file as argument (see their definitions
The download/upload functions first issue appropriate TYPE
and PORT or PASV commands.
# Disables https://bugs.python.org/issue43285 security if set to True.
trust_server_pasv_ipv4_address = False
# Initialization method (called by class instantiation).
# Initialize host to localhost, port to standard ftp port
# Optional arguments are host (for connect()),
# and user, passwd, acct (for login())
def __init__(self, host='', user='', passwd='', acct='',
timeout=_GLOBAL_DEFAULT_TIMEOUT, source_address=None):
self.source_address = source_address
self.login(user, passwd, acct)
# Context management protocol: try to quit() if active
def __exit__(self, *args):
if self.sock is not None:
except (OSError, EOFError):
if self.sock is not None:
def connect(self, host='', port=0, timeout=-999, source_address=None):
'''Connect to host. Arguments are:
- host: hostname to connect to (string, default previous host)
- port: port to connect to (integer, default previous port)
- timeout: the timeout to set against the ftp socket(s)
- source_address: a 2-tuple (host, port) for the socket to bind
to as its source address before connecting.
if source_address is not None:
self.source_address = source_address
self.sock = socket.create_connection((self.host, self.port), self.timeout,
source_address=self.source_address)
self.af = self.sock.family
self.file = self.sock.makefile('r', encoding=self.encoding)
self.welcome = self.getresp()
'''Get the welcome message from the server.
(this is read and squirreled away by connect())'''
print('*welcome*', self.sanitize(self.welcome))
def set_debuglevel(self, level):
'''Set the debugging level.
The required argument level means:
0: no debugging output (default)
1: print commands and responses but not body text etc.
2: also print raw lines read and sent before stripping CR/LF'''
'''Use passive or active mode for data transfers.
With a false argument, use the normal PORT mode,
With a true argument, use the PASV command.'''
# Internal: "sanitize" a string for printing
if s[:5] in {'pass ', 'PASS '}:
i = len(s.rstrip('\r\n'))
s = s[:5] + '*'*(i-5) + s[i:]
# Internal: send one line to the server, appending CRLF
if '\r' in line or '\n' in line:
raise ValueError('an illegal newline character should not be contained')
print('*put*', self.sanitize(line))
self.sock.sendall(line.encode(self.encoding))
# Internal: send one command to the server (through putline())
if self.debugging: print('*cmd*', self.sanitize(line))
# Internal: return one line from the server, stripping CRLF.
# Raise EOFError if the connection is closed
line = self.file.readline(self.maxline + 1)
if len(line) > self.maxline:
raise Error("got more than %d bytes" % self.maxline)
print('*get*', self.sanitize(line))
# Internal: get a response from the server, which may possibly
# consist of multiple lines. Return a single string with no
# trailing CRLF. If the response consists of multiple lines,
# these are separated by '\n' characters in the string
nextline = self.getline()
line = line + ('\n' + nextline)
if nextline[:3] == code and \
# Internal: get a response from the server.
# Raise various errors if the response indicates an error
resp = self.getmultiline()
print('*resp*', self.sanitize(resp))
"""Expect a response beginning with '2'."""
'''Abort a file transfer. Uses out-of-band data.
This does not follow the procedure from the RFC to send Telnet
IP and Synch; that doesn't seem to work with the servers I've
tried. Instead, just send the ABOR command as OOB data.'''
print('*put urgent*', self.sanitize(line))
self.sock.sendall(line, MSG_OOB)
resp = self.getmultiline()
if resp[:3] not in {'426', '225', '226'}:
'''Send a command and return the response.'''
"""Send a command and expect a response beginning with '2'."""
def sendport(self, host, port):
'''Send a PORT command with the current host and the given
pbytes = [repr(port//256), repr(port%256)]
cmd = 'PORT ' + ','.join(bytes)
def sendeprt(self, host, port):
'''Send an EPRT command with the current host and the given port number.'''
if self.af == socket.AF_INET:
if self.af == socket.AF_INET6:
raise error_proto('unsupported address family')
fields = ['', repr(af), host, repr(port), '']
cmd = 'EPRT ' + '|'.join(fields)
'''Create a new socket and send a PORT command for it.'''
for res in socket.getaddrinfo(None, 0, self.af, socket.SOCK_STREAM, 0, socket.AI_PASSIVE):
af, socktype, proto, canonname, sa = res
sock = socket.socket(af, socktype, proto)
raise OSError("getaddrinfo returns an empty list")
port = sock.getsockname()[1] # Get proper port
host = self.sock.getsockname()[0] # Get proper host
if self.af == socket.AF_INET:
resp = self.sendport(host, port)
resp = self.sendeprt(host, port)
if self.timeout is not _GLOBAL_DEFAULT_TIMEOUT:
sock.settimeout(self.timeout)
"""Internal: Does the PASV or EPSV handshake -> (address, port)"""
if self.af == socket.AF_INET:
untrusted_host, port = parse227(self.sendcmd('PASV'))
if self.trust_server_pasv_ipv4_address:
host = self.sock.getpeername()[0]
host, port = parse229(self.sendcmd('EPSV'), self.sock.getpeername())
def ntransfercmd(self, cmd, rest=None):
"""Initiate a transfer over the data connection.
If the transfer is active, send a port command and the
transfer command, and accept the connection. If the server is
passive, send a pasv command, connect to it, and start the
transfer command. Either way, return the socket for the
connection and the expected size of the transfer. The
expected size may be None if it could not be determined.
Optional `rest' argument can be a string that is sent as the
argument to a REST command. This is essentially a server
marker used to tell the server to skip over any data up to the
host, port = self.makepasv()
conn = socket.create_connection((host, port), self.timeout,
source_address=self.source_address)
self.sendcmd("REST %s" % rest)
# Some servers apparently send a 200 reply to
# a LIST or STOR command, before the 150 reply
# (and way before the 226 reply). This seems to
# be in violation of the protocol (which only allows
# 1xx or error messages for LIST), so we just discard
with self.makeport() as sock:
self.sendcmd("REST %s" % rest)
conn, sockaddr = sock.accept()
if self.timeout is not _GLOBAL_DEFAULT_TIMEOUT:
conn.settimeout(self.timeout)
# this is conditional in case we received a 125
def transfercmd(self, cmd, rest=None):
"""Like ntransfercmd() but returns only the socket."""
return self.ntransfercmd(cmd, rest)[0]
def login(self, user = '', passwd = '', acct = ''):
'''Login, default anonymous.'''
if user == 'anonymous' and passwd in {'', '-'}:
# If there is no anonymous ftp password specified
# then we'll just use anonymous@
# We don't send any other thing because:
# - We want to remain anonymous
# - We don't want to let ftp sites to discriminate by the user,
passwd = passwd + 'anonymous@'
resp = self.sendcmd('USER ' + user)
resp = self.sendcmd('PASS ' + passwd)
resp = self.sendcmd('ACCT ' + acct)
def retrbinary(self, cmd, callback, blocksize=8192, rest=None):
"""Retrieve data in binary mode. A new port is created for you.
callback: A single parameter callable to be called on each
blocksize: The maximum number of bytes to read from the
socket at one time. [default: 8192]
rest: Passed to transfercmd(). [default: None]
with self.transfercmd(cmd, rest) as conn:
data = conn.recv(blocksize)
if _SSLSocket is not None and isinstance(conn, _SSLSocket):
def retrlines(self, cmd, callback = None):
"""Retrieve data in line mode. A new port is created for you.
cmd: A RETR, LIST, or NLST command.
callback: An optional single parameter callable that is called
for each line with the trailing CRLF stripped.
resp = self.sendcmd('TYPE A')
with self.transfercmd(cmd) as conn, \
conn.makefile('r', encoding=self.encoding) as fp:
line = fp.readline(self.maxline + 1)
if len(line) > self.maxline:
raise Error("got more than %d bytes" % self.maxline)
print('*retr*', repr(line))
if _SSLSocket is not None and isinstance(conn, _SSLSocket):
def storbinary(self, cmd, fp, blocksize=8192, callback=None, rest=None):
"""Store a file in binary mode. A new port is created for you.
fp: A file-like object with a read(num_bytes) method.
It is recommended that you Edit text format, this type of Fix handles quite a lot in one request
