myftp.py :  » Business-Application » hylaPEx » hylapex » library » ftp » Python Open Source

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Python Open Source » Business Application » hylaPEx 
hylaPEx » hylapex » library » ftp » myftp.py
#!/usr/bin/python
# -*- coding: utf-8 -*-
#
# hylaPEx, an hylafax client written in python
#
# www.unipex.it/hylapex/
#
# License:
#         GNU General Public License (GPL)
#         For more info see LICENSE.txt and LICENSE-GPL.txt
#
# Copyright (C) 2004-2006  Unipex s.r.l.,  All Rights Reserved.
# Via Vittorio Veneto 83/A
# 33050 Gonars (UD) - Italy
# phone 0039 0432 931511 - fax 0039 0432 931378
# www.unipex.it - michele.petrazzo@unipex.it


# Twisted Imports
from twisted.protocols.ftp import FTPClientBasic,FTPClient,FTPCommand

class My_FTPClientBasic(FTPClientBasic):
    def queueLogin(self, username, password, userDeferredAfter=None):
        # Prepare the USER command
        deferreds = []
        userDeferred = self.queueStringCommand('USER ' + username, public=0)
        deferreds.append(userDeferred)
        
        # Prepare the PASS command (if a password is given)
        if password is not None:
            passwordCmd = FTPCommand('PASS ' + password, public=0)
            self.queueCommand(passwordCmd)
            deferreds.append(passwordCmd.deferred)
            
            # Avoid sending PASS if the response to USER is 230.
            # (ref: http://cr.yp.to/ftp/user.html#user)
            def cancelPasswordIfNotNeeded(response):
                if response[0].startswith('230'):
                    # No password needed!
                    self.actionQueue.remove(passwordCmd)
                    
                    if userDeferredAfter:
                        userDeferred.addCallback(userDeferredAfter)
                return response
            
            userDeferred.addCallback(cancelPasswordIfNotNeeded)
            
            if userDeferredAfter:
                passwordCmd.deferred.addCallback(userDeferredAfter)

        elif userDeferredAfter:
            userDeferred.addCallback(userDeferredAfter)

        # Error handling.
        for deferred in deferreds:
            # If something goes wrong, call fail
            deferred.addErrback(self.fail)
            # But also swallow the error, so we don't cause spurious errors
            deferred.addErrback(lambda x: None)

class My_FTPClient(My_FTPClientBasic, FTPClient):
    def __init__(self, username='anonymous',
                 password='twisted@twistedmatrix.com',
                 passive=1,
                 userDeferred=None):
        self.__userDeferred = userDeferred
        My_FTPClientBasic.__init__(self)
        FTPClient.__init__(self, username, password, passive)

    def queueLogin(self, username, password):
        """Login: send the username, send the password, and
        set retrieval mode to binary
        """
        My_FTPClientBasic.queueLogin(self, username, password, self.__userDeferred)
        d = self.queueStringCommand('TYPE I', public=0)
        d.addErrback(self.fail)
        d.addErrback(lambda x: None)
    
    def storeFileT(self):
        """ Change the STOR to STOT command, so hylafax create an unique
            and temporany name for the file
        """
        pasvCmd = FTPCommand('FORM TIFF')
        self.queueCommand(pasvCmd)
        
        cmds = ['STOT']
        return self.sendToConnection(cmds)
    
class FClient(My_FTPClient):
    def __init__(self, *args, **kw):
        self.__failCallBack = kw.pop("fail", None)
        My_FTPClient.__init__(self, *args, **kw)
        
    def fail(self, *args, **kw):
        My_FTPClient.fail(self, *args, **kw)
        if callable(self.__failCallBack):
            self.__failCallBack(*args, **kw)
    
    def queueStringCommand(self, cmd, *args, **kw):
        return My_FTPClient.queueStringCommand(self, str(cmd), *args, **kw )

    
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