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4b8c6eaf8b
*this* set of patches is Ka-Ping's final sweep: The attached patches update the standard library so that all modules have docstrings beginning with one-line summaries. A new docstring was added to formatter. The docstring for os.py was updated to mention nt, os2, ce in addition to posix, dos, mac.
721 lines
20 KiB
Python
721 lines
20 KiB
Python
"""An FTP client class and some helper functions.
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Based on RFC 959: File Transfer Protocol
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(FTP), by J. Postel and J. Reynolds
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Changes and improvements suggested by Steve Majewski.
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Modified by Jack to work on the mac.
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Modified by Siebren to support docstrings and PASV.
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Example:
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>>> from ftplib import FTP
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>>> ftp = FTP('ftp.python.org') # connect to host, default port
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>>> ftp.login() # default, i.e.: user anonymous, passwd user@hostname
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'230 Guest login ok, access restrictions apply.'
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>>> ftp.retrlines('LIST') # list directory contents
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total 9
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drwxr-xr-x 8 root wheel 1024 Jan 3 1994 .
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drwxr-xr-x 8 root wheel 1024 Jan 3 1994 ..
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drwxr-xr-x 2 root wheel 1024 Jan 3 1994 bin
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drwxr-xr-x 2 root wheel 1024 Jan 3 1994 etc
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d-wxrwxr-x 2 ftp wheel 1024 Sep 5 13:43 incoming
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drwxr-xr-x 2 root wheel 1024 Nov 17 1993 lib
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drwxr-xr-x 6 1094 wheel 1024 Sep 13 19:07 pub
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drwxr-xr-x 3 root wheel 1024 Jan 3 1994 usr
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-rw-r--r-- 1 root root 312 Aug 1 1994 welcome.msg
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'226 Transfer complete.'
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>>> ftp.quit()
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'221 Goodbye.'
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>>>
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A nice test that reveals some of the network dialogue would be:
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python ftplib.py -d localhost -l -p -l
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"""
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import os
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import sys
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import string
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# Import SOCKS module if it exists, else standard socket module socket
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try:
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import SOCKS; socket = SOCKS
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except ImportError:
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import socket
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# Magic number from <socket.h>
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MSG_OOB = 0x1 # Process data out of band
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# The standard FTP server control port
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FTP_PORT = 21
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# Exception raised when an error or invalid response is received
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error_reply = 'ftplib.error_reply' # unexpected [123]xx reply
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error_temp = 'ftplib.error_temp' # 4xx errors
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error_perm = 'ftplib.error_perm' # 5xx errors
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error_proto = 'ftplib.error_proto' # response does not begin with [1-5]
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# All exceptions (hopefully) that may be raised here and that aren't
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# (always) programming errors on our side
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all_errors = (error_reply, error_temp, error_perm, error_proto, \
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socket.error, IOError, EOFError)
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# Line terminators (we always output CRLF, but accept any of CRLF, CR, LF)
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CRLF = '\r\n'
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# The class itself
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class FTP:
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'''An FTP client class.
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To create a connection, call the class using these argument:
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host, user, passwd, acct
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These are all strings, and have default value ''.
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Then use self.connect() with optional host and port argument.
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To download a file, use ftp.retrlines('RETR ' + filename),
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or ftp.retrbinary() with slightly different arguments.
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To upload a file, use ftp.storlines() or ftp.storbinary(),
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which have an open file as argument (see their definitions
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below for details).
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The download/upload functions first issue appropriate TYPE
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and PORT or PASV commands.
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'''
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# Initialization method (called by class instantiation).
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# Initialize host to localhost, port to standard ftp port
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# Optional arguments are host (for connect()),
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# and user, passwd, acct (for login())
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def __init__(self, host = '', user = '', passwd = '', acct = ''):
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# Initialize the instance to something mostly harmless
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self.debugging = 0
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self.host = ''
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self.port = FTP_PORT
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self.sock = None
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self.file = None
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self.welcome = None
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resp = None
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if host:
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resp = self.connect(host)
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if user: resp = self.login(user, passwd, acct)
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def connect(self, host = '', port = 0):
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'''Connect to host. Arguments are:
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- host: hostname to connect to (string, default previous host)
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- port: port to connect to (integer, default previous port)'''
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if host: self.host = host
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if port: self.port = port
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self.passiveserver = 0
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self.sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
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self.sock.connect(self.host, self.port)
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self.file = self.sock.makefile('rb')
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self.welcome = self.getresp()
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return self.welcome
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def getwelcome(self):
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'''Get the welcome message from the server.
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(this is read and squirreled away by connect())'''
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if self.debugging:
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print '*welcome*', self.sanitize(self.welcome)
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return self.welcome
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def set_debuglevel(self, level):
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'''Set the debugging level.
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The required argument level means:
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0: no debugging output (default)
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1: print commands and responses but not body text etc.
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2: also print raw lines read and sent before stripping CR/LF'''
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self.debugging = level
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debug = set_debuglevel
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def set_pasv(self, val):
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'''Use passive or active mode for data transfers.
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With a false argument, use the normal PORT mode,
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With a true argument, use the PASV command.'''
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self.passiveserver = val
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# Internal: "sanitize" a string for printing
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def sanitize(self, s):
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if s[:5] == 'pass ' or s[:5] == 'PASS ':
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i = len(s)
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while i > 5 and s[i-1] in '\r\n':
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i = i-1
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s = s[:5] + '*'*(i-5) + s[i:]
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return `s`
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# Internal: send one line to the server, appending CRLF
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def putline(self, line):
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line = line + CRLF
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if self.debugging > 1: print '*put*', self.sanitize(line)
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self.sock.send(line)
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# Internal: send one command to the server (through putline())
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def putcmd(self, line):
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if self.debugging: print '*cmd*', self.sanitize(line)
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self.putline(line)
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# Internal: return one line from the server, stripping CRLF.
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# Raise EOFError if the connection is closed
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def getline(self):
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line = self.file.readline()
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if self.debugging > 1:
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print '*get*', self.sanitize(line)
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if not line: raise EOFError
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if line[-2:] == CRLF: line = line[:-2]
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elif line[-1:] in CRLF: line = line[:-1]
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return line
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# Internal: get a response from the server, which may possibly
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# consist of multiple lines. Return a single string with no
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# trailing CRLF. If the response consists of multiple lines,
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# these are separated by '\n' characters in the string
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def getmultiline(self):
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line = self.getline()
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if line[3:4] == '-':
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code = line[:3]
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while 1:
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nextline = self.getline()
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line = line + ('\n' + nextline)
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if nextline[:3] == code and \
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nextline[3:4] <> '-':
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break
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return line
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# Internal: get a response from the server.
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# Raise various errors if the response indicates an error
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def getresp(self):
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resp = self.getmultiline()
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if self.debugging: print '*resp*', self.sanitize(resp)
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self.lastresp = resp[:3]
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c = resp[:1]
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if c == '4':
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raise error_temp, resp
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if c == '5':
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raise error_perm, resp
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if c not in '123':
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raise error_proto, resp
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return resp
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def voidresp(self):
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"""Expect a response beginning with '2'."""
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resp = self.getresp()
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if resp[0] <> '2':
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raise error_reply, resp
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return resp
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def abort(self):
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'''Abort a file transfer. Uses out-of-band data.
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This does not follow the procedure from the RFC to send Telnet
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IP and Synch; that doesn't seem to work with the servers I've
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tried. Instead, just send the ABOR command as OOB data.'''
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line = 'ABOR' + CRLF
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if self.debugging > 1: print '*put urgent*', self.sanitize(line)
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self.sock.send(line, MSG_OOB)
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resp = self.getmultiline()
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if resp[:3] not in ('426', '226'):
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raise error_proto, resp
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def sendcmd(self, cmd):
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'''Send a command and return the response.'''
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self.putcmd(cmd)
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return self.getresp()
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def voidcmd(self, cmd):
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"""Send a command and expect a response beginning with '2'."""
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self.putcmd(cmd)
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return self.voidresp()
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def sendport(self, host, port):
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'''Send a PORT command with the current host and the given port number.'''
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hbytes = string.splitfields(host, '.')
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pbytes = [`port/256`, `port%256`]
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bytes = hbytes + pbytes
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cmd = 'PORT ' + string.joinfields(bytes, ',')
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return self.voidcmd(cmd)
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def makeport(self):
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'''Create a new socket and send a PORT command for it.'''
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global nextport
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sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
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sock.bind(('', 0))
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sock.listen(1)
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dummyhost, port = sock.getsockname() # Get proper port
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host, dummyport = self.sock.getsockname() # Get proper host
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resp = self.sendport(host, port)
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return sock
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def ntransfercmd(self, cmd):
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'''Initiate a transfer over the data connection.
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If the transfer is active, send a port command and
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the transfer command, and accept the connection.
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If the server is passive, send a pasv command, connect
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to it, and start the transfer command.
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Either way, return the socket for the connection and
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the expected size of the transfer. The expected size
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may be None if it could not be determined.'''
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size = None
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if self.passiveserver:
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host, port = parse227(self.sendcmd('PASV'))
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conn = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
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conn.connect(host, port)
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resp = self.sendcmd(cmd)
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if resp[0] <> '1':
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raise error_reply, resp
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else:
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sock = self.makeport()
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resp = self.sendcmd(cmd)
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if resp[0] <> '1':
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raise error_reply, resp
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conn, sockaddr = sock.accept()
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if resp[:3] == '150':
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# this is conditional in case we received a 125
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size = parse150(resp)
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return conn, size
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def transfercmd(self, cmd):
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'''Initiate a transfer over the data connection. Returns
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the socket for the connection. See also ntransfercmd().'''
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return self.ntransfercmd(cmd)[0]
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def login(self, user = '', passwd = '', acct = ''):
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'''Login, default anonymous.'''
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if not user: user = 'anonymous'
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if not passwd: passwd = ''
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if not acct: acct = ''
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if user == 'anonymous' and passwd in ('', '-'):
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thishost = socket.gethostname()
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# Make sure it is fully qualified
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if not '.' in thishost:
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thisaddr = socket.gethostbyname(thishost)
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firstname, names, unused = \
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socket.gethostbyaddr(thisaddr)
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names.insert(0, firstname)
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for name in names:
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if '.' in name:
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thishost = name
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break
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try:
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if os.environ.has_key('LOGNAME'):
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realuser = os.environ['LOGNAME']
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elif os.environ.has_key('USER'):
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realuser = os.environ['USER']
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else:
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realuser = 'anonymous'
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except AttributeError:
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# Not all systems have os.environ....
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realuser = 'anonymous'
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passwd = passwd + realuser + '@' + thishost
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resp = self.sendcmd('USER ' + user)
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if resp[0] == '3': resp = self.sendcmd('PASS ' + passwd)
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if resp[0] == '3': resp = self.sendcmd('ACCT ' + acct)
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if resp[0] <> '2':
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raise error_reply, resp
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return resp
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def retrbinary(self, cmd, callback, blocksize=8192):
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'''Retrieve data in binary mode.
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The argument is a RETR command.
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The callback function is called for each block.
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This creates a new port for you'''
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self.voidcmd('TYPE I')
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conn = self.transfercmd(cmd)
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while 1:
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data = conn.recv(blocksize)
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if not data:
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break
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callback(data)
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conn.close()
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return self.voidresp()
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def retrlines(self, cmd, callback = None):
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'''Retrieve data in line mode.
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The argument is a RETR or LIST command.
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The callback function (2nd argument) is called for each line,
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with trailing CRLF stripped. This creates a new port for you.
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print_line() is the default callback.'''
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if not callback: callback = print_line
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resp = self.sendcmd('TYPE A')
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conn = self.transfercmd(cmd)
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fp = conn.makefile('rb')
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while 1:
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line = fp.readline()
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if self.debugging > 2: print '*retr*', `line`
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if not line:
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break
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if line[-2:] == CRLF:
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line = line[:-2]
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elif line[-1:] == '\n':
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line = line[:-1]
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callback(line)
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fp.close()
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conn.close()
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return self.voidresp()
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def storbinary(self, cmd, fp, blocksize):
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'''Store a file in binary mode.'''
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self.voidcmd('TYPE I')
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conn = self.transfercmd(cmd)
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while 1:
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buf = fp.read(blocksize)
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if not buf: break
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conn.send(buf)
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conn.close()
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return self.voidresp()
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def storlines(self, cmd, fp):
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'''Store a file in line mode.'''
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self.voidcmd('TYPE A')
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conn = self.transfercmd(cmd)
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while 1:
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buf = fp.readline()
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if not buf: break
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if buf[-2:] <> CRLF:
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if buf[-1] in CRLF: buf = buf[:-1]
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buf = buf + CRLF
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conn.send(buf)
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conn.close()
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return self.voidresp()
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def acct(self, password):
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'''Send new account name.'''
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cmd = 'ACCT ' + password
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return self.voidcmd(cmd)
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def nlst(self, *args):
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'''Return a list of files in a given directory (default the current).'''
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cmd = 'NLST'
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for arg in args:
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cmd = cmd + (' ' + arg)
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files = []
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self.retrlines(cmd, files.append)
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return files
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|
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def dir(self, *args):
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'''List a directory in long form.
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By default list current directory to stdout.
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Optional last argument is callback function; all
|
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non-empty arguments before it are concatenated to the
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LIST command. (This *should* only be used for a pathname.)'''
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cmd = 'LIST'
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func = None
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if args[-1:] and type(args[-1]) != type(''):
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args, func = args[:-1], args[-1]
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for arg in args:
|
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if arg:
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cmd = cmd + (' ' + arg)
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self.retrlines(cmd, func)
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def rename(self, fromname, toname):
|
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'''Rename a file.'''
|
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resp = self.sendcmd('RNFR ' + fromname)
|
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if resp[0] <> '3':
|
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raise error_reply, resp
|
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return self.voidcmd('RNTO ' + toname)
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def delete(self, filename):
|
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'''Delete a file.'''
|
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resp = self.sendcmd('DELE ' + filename)
|
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if resp[:3] in ('250', '200'):
|
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return resp
|
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elif resp[:1] == '5':
|
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raise error_perm, resp
|
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else:
|
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raise error_reply, resp
|
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|
||
def cwd(self, dirname):
|
||
'''Change to a directory.'''
|
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if dirname == '..':
|
||
try:
|
||
return self.voidcmd('CDUP')
|
||
except error_perm, msg:
|
||
if msg[:3] != '500':
|
||
raise error_perm, msg
|
||
elif dirname == '':
|
||
dirname = '.' # does nothing, but could return error
|
||
cmd = 'CWD ' + dirname
|
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return self.voidcmd(cmd)
|
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|
||
def size(self, filename):
|
||
'''Retrieve the size of a file.'''
|
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# Note that the RFC doesn't say anything about 'SIZE'
|
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resp = self.sendcmd('SIZE ' + filename)
|
||
if resp[:3] == '213':
|
||
return string.atoi(string.strip(resp[3:]))
|
||
|
||
def mkd(self, dirname):
|
||
'''Make a directory, return its full pathname.'''
|
||
resp = self.sendcmd('MKD ' + dirname)
|
||
return parse257(resp)
|
||
|
||
def rmd(self, dirname):
|
||
'''Remove a directory.'''
|
||
return self.voidcmd('RMD ' + dirname)
|
||
|
||
def pwd(self):
|
||
'''Return current working directory.'''
|
||
resp = self.sendcmd('PWD')
|
||
return parse257(resp)
|
||
|
||
def quit(self):
|
||
'''Quit, and close the connection.'''
|
||
resp = self.voidcmd('QUIT')
|
||
self.close()
|
||
return resp
|
||
|
||
def close(self):
|
||
'''Close the connection without assuming anything about it.'''
|
||
self.file.close()
|
||
self.sock.close()
|
||
del self.file, self.sock
|
||
|
||
|
||
_150_re = None
|
||
|
||
def parse150(resp):
|
||
'''Parse the '150' response for a RETR request.
|
||
Returns the expected transfer size or None; size is not guaranteed to
|
||
be present in the 150 message.
|
||
'''
|
||
if resp[:3] != '150':
|
||
raise error_reply, resp
|
||
global _150_re
|
||
if _150_re is None:
|
||
import re
|
||
_150_re = re.compile("150 .* \((\d+) bytes\)", re.IGNORECASE)
|
||
m = _150_re.match(resp)
|
||
if m:
|
||
return string.atoi(m.group(1))
|
||
return None
|
||
|
||
|
||
def parse227(resp):
|
||
'''Parse the '227' response for a PASV request.
|
||
Raises error_proto if it does not contain '(h1,h2,h3,h4,p1,p2)'
|
||
Return ('host.addr.as.numbers', port#) tuple.'''
|
||
|
||
if resp[:3] <> '227':
|
||
raise error_reply, resp
|
||
left = string.find(resp, '(')
|
||
if left < 0: raise error_proto, resp
|
||
right = string.find(resp, ')', left + 1)
|
||
if right < 0:
|
||
raise error_proto, resp # should contain '(h1,h2,h3,h4,p1,p2)'
|
||
numbers = string.split(resp[left+1:right], ',')
|
||
if len(numbers) <> 6:
|
||
raise error_proto, resp
|
||
host = string.join(numbers[:4], '.')
|
||
port = (string.atoi(numbers[4]) << 8) + string.atoi(numbers[5])
|
||
return host, port
|
||
|
||
|
||
def parse257(resp):
|
||
'''Parse the '257' response for a MKD or PWD request.
|
||
This is a response to a MKD or PWD request: a directory name.
|
||
Returns the directoryname in the 257 reply.'''
|
||
|
||
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
|
||
|
||
|
||
def print_line(line):
|
||
'''Default retrlines callback to print a line.'''
|
||
print line
|
||
|
||
|
||
def ftpcp(source, sourcename, target, targetname = '', type = 'I'):
|
||
'''Copy file from one FTP-instance to another.'''
|
||
if not targetname: targetname = sourcename
|
||
type = 'TYPE ' + type
|
||
source.voidcmd(type)
|
||
target.voidcmd(type)
|
||
sourcehost, sourceport = parse227(source.sendcmd('PASV'))
|
||
target.sendport(sourcehost, sourceport)
|
||
# RFC 959: the user must "listen" [...] BEFORE sending the
|
||
# transfer request.
|
||
# So: STOR before RETR, because here the target is a "user".
|
||
treply = target.sendcmd('STOR ' + targetname)
|
||
if treply[:3] not in ('125', '150'): raise error_proto # RFC 959
|
||
sreply = source.sendcmd('RETR ' + sourcename)
|
||
if sreply[:3] not in ('125', '150'): raise error_proto # RFC 959
|
||
source.voidresp()
|
||
target.voidresp()
|
||
|
||
|
||
class Netrc:
|
||
"""Class to parse & provide access to 'netrc' format files.
|
||
|
||
See the netrc(4) man page for information on the file format.
|
||
|
||
WARNING: This class is obsolete -- use module netrc instead.
|
||
|
||
"""
|
||
__defuser = None
|
||
__defpasswd = None
|
||
__defacct = None
|
||
|
||
def __init__(self, filename=None):
|
||
if not filename:
|
||
if os.environ.has_key("HOME"):
|
||
filename = os.path.join(os.environ["HOME"],
|
||
".netrc")
|
||
else:
|
||
raise IOError, \
|
||
"specify file to load or set $HOME"
|
||
self.__hosts = {}
|
||
self.__macros = {}
|
||
fp = open(filename, "r")
|
||
in_macro = 0
|
||
while 1:
|
||
line = fp.readline()
|
||
if not line: break
|
||
if in_macro and string.strip(line):
|
||
macro_lines.append(line)
|
||
continue
|
||
elif in_macro:
|
||
self.__macros[macro_name] = tuple(macro_lines)
|
||
in_macro = 0
|
||
words = string.split(line)
|
||
host = user = passwd = acct = None
|
||
default = 0
|
||
i = 0
|
||
while i < len(words):
|
||
w1 = words[i]
|
||
if i+1 < len(words):
|
||
w2 = words[i + 1]
|
||
else:
|
||
w2 = None
|
||
if w1 == 'default':
|
||
default = 1
|
||
elif w1 == 'machine' and w2:
|
||
host = string.lower(w2)
|
||
i = i + 1
|
||
elif w1 == 'login' and w2:
|
||
user = w2
|
||
i = i + 1
|
||
elif w1 == 'password' and w2:
|
||
passwd = w2
|
||
i = i + 1
|
||
elif w1 == 'account' and w2:
|
||
acct = w2
|
||
i = i + 1
|
||
elif w1 == 'macdef' and w2:
|
||
macro_name = w2
|
||
macro_lines = []
|
||
in_macro = 1
|
||
break
|
||
i = i + 1
|
||
if default:
|
||
self.__defuser = user or self.__defuser
|
||
self.__defpasswd = passwd or self.__defpasswd
|
||
self.__defacct = acct or self.__defacct
|
||
if host:
|
||
if self.__hosts.has_key(host):
|
||
ouser, opasswd, oacct = \
|
||
self.__hosts[host]
|
||
user = user or ouser
|
||
passwd = passwd or opasswd
|
||
acct = acct or oacct
|
||
self.__hosts[host] = user, passwd, acct
|
||
fp.close()
|
||
|
||
def get_hosts(self):
|
||
"""Return a list of hosts mentioned in the .netrc file."""
|
||
return self.__hosts.keys()
|
||
|
||
def get_account(self, host):
|
||
"""Returns login information for the named host.
|
||
|
||
The return value is a triple containing userid,
|
||
password, and the accounting field.
|
||
|
||
"""
|
||
host = string.lower(host)
|
||
user = passwd = acct = None
|
||
if self.__hosts.has_key(host):
|
||
user, passwd, acct = self.__hosts[host]
|
||
user = user or self.__defuser
|
||
passwd = passwd or self.__defpasswd
|
||
acct = acct or self.__defacct
|
||
return user, passwd, acct
|
||
|
||
def get_macros(self):
|
||
"""Return a list of all defined macro names."""
|
||
return self.__macros.keys()
|
||
|
||
def get_macro(self, macro):
|
||
"""Return a sequence of lines which define a named macro."""
|
||
return self.__macros[macro]
|
||
|
||
|
||
|
||
def test():
|
||
'''Test program.
|
||
Usage: ftp [-d] [-r[file]] host [-l[dir]] [-d[dir]] [-p] [file] ...'''
|
||
|
||
debugging = 0
|
||
rcfile = None
|
||
while sys.argv[1] == '-d':
|
||
debugging = debugging+1
|
||
del sys.argv[1]
|
||
if sys.argv[1][:2] == '-r':
|
||
# get name of alternate ~/.netrc file:
|
||
rcfile = sys.argv[1][2:]
|
||
del sys.argv[1]
|
||
host = sys.argv[1]
|
||
ftp = FTP(host)
|
||
ftp.set_debuglevel(debugging)
|
||
userid = passwd = acct = ''
|
||
try:
|
||
netrc = Netrc(rcfile)
|
||
except IOError:
|
||
if rcfile is not None:
|
||
sys.stderr.write("Could not open account file"
|
||
" -- using anonymous login.")
|
||
else:
|
||
try:
|
||
userid, passwd, acct = netrc.get_account(host)
|
||
except KeyError:
|
||
# no account for host
|
||
sys.stderr.write(
|
||
"No account -- using anonymous login.")
|
||
ftp.login(userid, passwd, acct)
|
||
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)
|
||
elif file == '-p':
|
||
ftp.set_pasv(not ftp.passiveserver)
|
||
else:
|
||
ftp.retrbinary('RETR ' + file, \
|
||
sys.stdout.write, 1024)
|
||
ftp.quit()
|
||
|
||
|
||
if __name__ == '__main__':
|
||
test()
|