mirror of
https://github.com/python/cpython.git
synced 2024-11-25 02:44:06 +08:00
445 lines
12 KiB
Python
445 lines
12 KiB
Python
# An FTP client class. Based on RFC 959: File Transfer Protocol
|
|
# (FTP), by J. Postel and J. Reynolds
|
|
|
|
# Changes and improvements suggested by Steve Majewski
|
|
# Modified by Jack to work on the mac.
|
|
|
|
|
|
# Example:
|
|
#
|
|
# >>> from ftplib import FTP
|
|
# >>> ftp = FTP('ftp.cwi.nl') # connect to host, default port
|
|
# >>> ftp.login() # default, i.e.: user anonymous, passwd user@hostname
|
|
# >>> ftp.retrlines('LIST') # list directory contents
|
|
# total 43
|
|
# d--x--x--x 2 root root 512 Jul 1 16:50 bin
|
|
# d--x--x--x 2 root root 512 Sep 16 1991 etc
|
|
# drwxr-xr-x 2 root ftp 10752 Sep 16 1991 lost+found
|
|
# drwxr-srwt 15 root ftp 10240 Nov 5 20:43 pub
|
|
# >>> ftp.quit()
|
|
#
|
|
# 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.
|
|
# The download/upload functions first issue appropriate TYPE and PORT
|
|
# commands.
|
|
|
|
|
|
import os
|
|
import sys
|
|
import string
|
|
|
|
# Import SOCKS module if it exists, else standard socket module socket
|
|
try:
|
|
import SOCKS; socket = SOCKS
|
|
except ImportError:
|
|
import socket
|
|
|
|
|
|
# Magic number from <socket.h>
|
|
MSG_OOB = 0x1 # Process data out of band
|
|
|
|
|
|
# The standard FTP server control port
|
|
FTP_PORT = 21
|
|
|
|
|
|
# Exception raised when an error or invalid response is received
|
|
error_reply = 'ftplib.error_reply' # unexpected [123]xx reply
|
|
error_temp = 'ftplib.error_temp' # 4xx errors
|
|
error_perm = 'ftplib.error_perm' # 5xx errors
|
|
error_proto = 'ftplib.error_proto' # 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_reply, error_temp, error_perm, error_proto, \
|
|
socket.error, IOError)
|
|
|
|
|
|
# Line terminators (we always output CRLF, but accept any of CRLF, CR, LF)
|
|
CRLF = '\r\n'
|
|
|
|
|
|
# The class itself
|
|
class FTP:
|
|
|
|
# New 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 = ''):
|
|
# Initialize the instance to something mostly harmless
|
|
self.debugging = 0
|
|
self.host = ''
|
|
self.port = FTP_PORT
|
|
self.sock = None
|
|
self.file = None
|
|
self.welcome = None
|
|
if host:
|
|
self.connect(host)
|
|
if user: self.login(user, passwd, acct)
|
|
|
|
# Connect to host. Arguments:
|
|
# - host: hostname to connect to (default previous host)
|
|
# - port: port to connect to (default previous port)
|
|
def connect(self, host = '', port = 0):
|
|
if host: self.host = host
|
|
if port: self.port = port
|
|
self.sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
|
|
self.sock.connect(self.host, self.port)
|
|
self.file = self.sock.makefile('r')
|
|
self.welcome = self.getresp()
|
|
|
|
# Get the welcome message from the server
|
|
# (this is read and squirreled away by connect())
|
|
def getwelcome(self):
|
|
if self.debugging:
|
|
print '*welcome*', self.sanitize(self.welcome)
|
|
return self.welcome
|
|
|
|
# Set the debugging level. 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
|
|
def set_debuglevel(self, level):
|
|
self.debugging = level
|
|
debug = set_debuglevel
|
|
|
|
# Internal: "sanitize" a string for printing
|
|
def sanitize(self, s):
|
|
if s[:5] == 'pass ' or s[:5] == 'PASS ':
|
|
i = len(s)
|
|
while i > 5 and s[i-1] in '\r\n':
|
|
i = i-1
|
|
s = s[:5] + '*'*(i-5) + s[i:]
|
|
return `s`
|
|
|
|
# Internal: send one line to the server, appending CRLF
|
|
def putline(self, line):
|
|
line = line + CRLF
|
|
if self.debugging > 1: print '*put*', self.sanitize(line)
|
|
self.sock.send(line)
|
|
|
|
# Internal: send one command to the server (through putline())
|
|
def putcmd(self, line):
|
|
if self.debugging: print '*cmd*', self.sanitize(line)
|
|
self.putline(line)
|
|
|
|
# Internal: return one line from the server, stripping CRLF.
|
|
# Raise EOFError if the connection is closed
|
|
def getline(self):
|
|
line = self.file.readline()
|
|
if self.debugging > 1:
|
|
print '*get*', self.sanitize(line)
|
|
if not line: raise EOFError
|
|
if line[-2:] == CRLF: line = line[:-2]
|
|
elif line[-1:] in CRLF: line = line[:-1]
|
|
return 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
|
|
def getmultiline(self):
|
|
line = self.getline()
|
|
if line[3:4] == '-':
|
|
code = line[:3]
|
|
while 1:
|
|
nextline = self.getline()
|
|
line = line + ('\n' + nextline)
|
|
if nextline[:3] == code and \
|
|
nextline[3:4] <> '-':
|
|
break
|
|
return line
|
|
|
|
# Internal: get a response from the server.
|
|
# Raise various errors if the response indicates an error
|
|
def getresp(self):
|
|
resp = self.getmultiline()
|
|
if self.debugging: print '*resp*', self.sanitize(resp)
|
|
self.lastresp = resp[:3]
|
|
c = resp[:1]
|
|
if c == '4':
|
|
raise error_temp, resp
|
|
if c == '5':
|
|
raise error_perm, resp
|
|
if c not in '123':
|
|
raise error_proto, resp
|
|
return resp
|
|
|
|
# Expect a response beginning with '2'
|
|
def voidresp(self):
|
|
resp = self.getresp()
|
|
if resp[0] <> '2':
|
|
raise error_reply, resp
|
|
|
|
# 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.
|
|
def abort(self):
|
|
line = 'ABOR' + CRLF
|
|
if self.debugging > 1: print '*put urgent*', self.sanitize(line)
|
|
self.sock.send(line, MSG_OOB)
|
|
resp = self.getmultiline()
|
|
if resp[:3] not in ('426', '226'):
|
|
raise error_proto, resp
|
|
|
|
# Send a command and return the response
|
|
def sendcmd(self, cmd):
|
|
self.putcmd(cmd)
|
|
return self.getresp()
|
|
|
|
# Send a command and expect a response beginning with '2'
|
|
def voidcmd(self, cmd):
|
|
self.putcmd(cmd)
|
|
self.voidresp()
|
|
|
|
# Send a PORT command with the current host and the given port number
|
|
def sendport(self, host, port):
|
|
hbytes = string.splitfields(host, '.')
|
|
pbytes = [`port/256`, `port%256`]
|
|
bytes = hbytes + pbytes
|
|
cmd = 'PORT ' + string.joinfields(bytes, ',')
|
|
self.voidcmd(cmd)
|
|
|
|
# Create a new socket and send a PORT command for it
|
|
def makeport(self):
|
|
global nextport
|
|
sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
|
|
sock.bind(('', 0))
|
|
sock.listen(1)
|
|
dummyhost, port = sock.getsockname() # Get proper port
|
|
host, dummyport = self.sock.getsockname() # Get proper host
|
|
resp = self.sendport(host, port)
|
|
return sock
|
|
|
|
# Send a port command and a transfer command, accept the connection
|
|
# and return the socket for the connection
|
|
def transfercmd(self, cmd):
|
|
sock = self.makeport()
|
|
resp = self.sendcmd(cmd)
|
|
if resp[0] <> '1':
|
|
raise error_reply, resp
|
|
conn, sockaddr = sock.accept()
|
|
return conn
|
|
|
|
# Login, default anonymous
|
|
def login(self, user = '', passwd = '', acct = ''):
|
|
if not user: user = 'anonymous'
|
|
if user == 'anonymous' and passwd in ('', '-'):
|
|
thishost = socket.gethostname()
|
|
# Make sure it is fully qualified
|
|
if not '.' in thishost:
|
|
thisaddr = socket.gethostbyname(thishost)
|
|
firstname, names, unused = \
|
|
socket.gethostbyaddr(thisaddr)
|
|
names.insert(0, firstname)
|
|
for name in names:
|
|
if '.' in name:
|
|
thishost = name
|
|
break
|
|
try:
|
|
if os.environ.has_key('LOGNAME'):
|
|
realuser = os.environ['LOGNAME']
|
|
elif os.environ.has_key('USER'):
|
|
realuser = os.environ['USER']
|
|
else:
|
|
realuser = 'anonymous'
|
|
except AttributeError:
|
|
# Not all systems have os.environ....
|
|
realuser = 'anonymous'
|
|
passwd = passwd + realuser + '@' + thishost
|
|
resp = self.sendcmd('USER ' + user)
|
|
if resp[0] == '3': resp = self.sendcmd('PASS ' + passwd)
|
|
if resp[0] == '3': resp = self.sendcmd('ACCT ' + acct)
|
|
if resp[0] <> '2':
|
|
raise error_reply, resp
|
|
|
|
# Retrieve data in binary mode.
|
|
# The argument is a RETR command.
|
|
# The callback function is called for each block.
|
|
# This creates a new port for you
|
|
def retrbinary(self, cmd, callback, blocksize):
|
|
self.voidcmd('TYPE I')
|
|
conn = self.transfercmd(cmd)
|
|
while 1:
|
|
data = conn.recv(blocksize)
|
|
if not data:
|
|
break
|
|
callback(data)
|
|
conn.close()
|
|
self.voidresp()
|
|
|
|
# Retrieve data in line mode.
|
|
# The argument is a RETR or LIST command.
|
|
# The callback function is called for each line, with trailing
|
|
# CRLF stripped. This creates a new port for you.
|
|
# print_lines is the default callback
|
|
def retrlines(self, cmd, callback = None):
|
|
if not callback: callback = print_line
|
|
resp = self.sendcmd('TYPE A')
|
|
conn = self.transfercmd(cmd)
|
|
fp = conn.makefile('r')
|
|
while 1:
|
|
line = fp.readline()
|
|
if not line:
|
|
break
|
|
if line[-2:] == CRLF:
|
|
line = line[:-2]
|
|
elif line[:-1] == '\n':
|
|
line = line[:-1]
|
|
callback(line)
|
|
fp.close()
|
|
conn.close()
|
|
self.voidresp()
|
|
|
|
# Store a file in binary mode
|
|
def storbinary(self, cmd, fp, blocksize):
|
|
self.voidcmd('TYPE I')
|
|
conn = self.transfercmd(cmd)
|
|
while 1:
|
|
buf = fp.read(blocksize)
|
|
if not buf: break
|
|
conn.send(buf)
|
|
conn.close()
|
|
self.voidresp()
|
|
|
|
# Store a file in line mode
|
|
def storlines(self, cmd, fp):
|
|
self.voidcmd('TYPE A')
|
|
conn = self.transfercmd(cmd)
|
|
while 1:
|
|
buf = fp.readline()
|
|
if not buf: break
|
|
if buf[-2:] <> CRLF:
|
|
if buf[-1] in CRLF: buf = buf[:-1]
|
|
buf = buf + CRLF
|
|
conn.send(buf)
|
|
conn.close()
|
|
self.voidresp()
|
|
|
|
# Return a list of files in a given directory (default the current)
|
|
def nlst(self, *args):
|
|
cmd = 'NLST'
|
|
for arg in args:
|
|
cmd = cmd + (' ' + arg)
|
|
files = []
|
|
self.retrlines(cmd, files.append)
|
|
return files
|
|
|
|
# List a directory in long form. By default list current directory
|
|
# to stdout. Optional last argument is callback function;
|
|
# all non-empty arguments before it are concatenated to the
|
|
# LIST command. (This *should* only be used for a pathname.)
|
|
def dir(self, *args):
|
|
cmd = 'LIST'
|
|
func = None
|
|
if args[-1:] and type(args[-1]) != type(''):
|
|
args, func = args[:-1], args[-1]
|
|
for arg in args:
|
|
if arg:
|
|
cmd = cmd + (' ' + arg)
|
|
self.retrlines(cmd, func)
|
|
|
|
# Rename a file
|
|
def rename(self, fromname, toname):
|
|
resp = self.sendcmd('RNFR ' + fromname)
|
|
if resp[0] <> '3':
|
|
raise error_reply, resp
|
|
self.voidcmd('RNTO ' + toname)
|
|
|
|
# Change to a directory
|
|
def cwd(self, dirname):
|
|
if dirname == '..':
|
|
try:
|
|
self.voidcmd('CDUP')
|
|
return
|
|
except error_perm, msg:
|
|
if msg[:3] != '500':
|
|
raise error_perm, msg
|
|
cmd = 'CWD ' + dirname
|
|
self.voidcmd(cmd)
|
|
|
|
# Retrieve the size of a file
|
|
def size(self, filename):
|
|
resp = self.sendcmd('SIZE ' + filename)
|
|
if resp[:3] == '213':
|
|
return string.atoi(string.strip(resp[3:]))
|
|
|
|
# Make a directory, return its full pathname
|
|
def mkd(self, dirname):
|
|
resp = self.sendcmd('MKD ' + dirname)
|
|
return parse257(resp)
|
|
|
|
# Return current wording directory
|
|
def pwd(self):
|
|
resp = self.sendcmd('PWD')
|
|
return parse257(resp)
|
|
|
|
# Quit, and close the connection
|
|
def quit(self):
|
|
self.voidcmd('QUIT')
|
|
self.close()
|
|
|
|
# Close the connection without assuming anything about it
|
|
def close(self):
|
|
self.file.close()
|
|
self.sock.close()
|
|
del self.file, self.sock
|
|
|
|
|
|
# Parse a response type 257
|
|
def parse257(resp):
|
|
if resp[:3] <> '257':
|
|
raise error_reply, resp
|
|
if resp[3:5] <> ' "':
|
|
return '' # Not compliant to RFC 959, but UNIX ftpd does this
|
|
dirname = ''
|
|
i = 5
|
|
n = len(resp)
|
|
while i < n:
|
|
c = resp[i]
|
|
i = i+1
|
|
if c == '"':
|
|
if i >= n or resp[i] <> '"':
|
|
break
|
|
i = i+1
|
|
dirname = dirname + c
|
|
return dirname
|
|
|
|
# Default retrlines callback to print a line
|
|
def print_line(line):
|
|
print line
|
|
|
|
|
|
# Test program.
|
|
# Usage: ftp [-d] host [-l[dir]] [-d[dir]] [file] ...
|
|
def test():
|
|
import marshal
|
|
debugging = 0
|
|
while sys.argv[1] == '-d':
|
|
debugging = debugging+1
|
|
del sys.argv[1]
|
|
host = sys.argv[1]
|
|
ftp = FTP(host)
|
|
ftp.set_debuglevel(debugging)
|
|
ftp.login()
|
|
for file in sys.argv[2:]:
|
|
if file[:2] == '-l':
|
|
ftp.dir(file[2:])
|
|
elif file[:2] == '-d':
|
|
cmd = 'CWD'
|
|
if file[2:]: cmd = cmd + ' ' + file[2:]
|
|
resp = ftp.sendcmd(cmd)
|
|
else:
|
|
ftp.retrbinary('RETR ' + file, \
|
|
sys.stdout.write, 1024)
|
|
ftp.quit()
|
|
|
|
|
|
if __name__ == '__main__':
|
|
test()
|