Thank you for your reply.In fact I found this code in many forums like S.O and
I tried to understand it, by doing exactly all steps you recommend in you
response. The difficulty I have found is with the method of the returned object
of openFile method of the FileTransferClient class. This returned object that
adhere to ISFTP interface; has two methods to write and read: "writeChunk" and
"readChunk". My problem is to use these last functions or methods to perform a
file transfert (uploading and downloading) from my local machine running
twisted to a SFTP server and vise-versa.Can you give me an code example to
perform this task? with the methods of the openFile object.
Sanfo
Le Mercredi 15 avril 2015 6h22, Kevin Horn <[email protected]> a écrit :
On Tue, Apr 14, 2015 at 6:47 AM, halidou SANFO <[email protected]> wrote:
Hi everybody,I am student and need help of any one.I am working on internship
and I have to implement a SFTP client usign twisted conch module.I have program
thoe code to establish th ssh tunnel using password authentication. I arrive to
create directory with "MakeDirectory" method of FileTransfertClient class.But
my objective is to upload and download files and the FileTransfertClient class
has no method [or as I konw ] to do that.
Can you help me with way to do the uploading and the downloding with twisted
conch?
Here is my program.<code>'''Created on 8 avr. 2015
@author: hsanfo'''
from sys import stdout
from twisted.python.log import startLogging, err
from twisted.internet import reactorfrom twisted.internet.defer import Deferred
from twisted.conch.ssh.common import NSimport
twisted.conch.scripts.cftp.ClientOptionsfrom twisted.conch.scripts.cftp import
ClientOptionsfrom twisted.conch.ssh.filetransfer import FileTransferClientfrom
twisted.conch.client.connect import connectfrom twisted.conch.client.default
import SSHUserAuthClient, verifyHostKeyfrom twisted.conch.ssh.connection import
SSHConnectionfrom twisted.conch.ssh.channel import SSHChannel
from twisted.conch.ssh import keys, userauthfrom twisted.internet import defer
class SFTPSession(SSHChannel): name = 'session'
def channelOpen(self, whatever): d = self.conn.sendRequest(
self, 'subsystem', NS('sftp'), wantReply=True)
d.addCallbacks(self._cbSFTP)
def _cbSFTP(self, result): client = FileTransferClient()
client.makeConnection(self) self.dataReceived = client.dataReceived
self.conn._sftp.callback(client)
class SFTPConnection(SSHConnection): def serviceStarted(self):
self.openChannel(SFTPSession())
class ClientUserAuth(userauth.SSHUserAuthClient): def getPassword(self,
prompt = None): #normal password authentication print "PASSWORD
AUTH" return defer.succeed('test') # <-- YOUR PASSWORD
def getGenericAnswers(self, name, instruction, prompts):
#interactive password authentication print "INTERACTIVE AUTH"
response = ['']*len(prompts) for i, p in enumerate(prompts):
try: if('password' in p[0].lower()):
response[i] = 'test' # <-- YOUR PASSWORD except: pass
#The response is always a sequence, and the length of it is always
#identical to the length of prompts return defer.succeed(response)
def sftp(user, host, port): options = ClientOptions() options['host']
= host options['port'] = port conn = SFTPConnection() conn._sftp =
Deferred() auth = SSHUserAuthClient(user, options, conn) #auth =
ClientUserAuth(user, options, conn) #connect(host, port, options,
verifyHostKey, auth) connect(host, port, options, None, auth) return
conn._sftp
def transfer(client): d = client.makeDirectory('foobarbaz', {}) def
cbDir(ignored): print 'Made directory' d.addCallback(cbDir) return
d
def main(): startLogging(stdout)
user = 'test' host = '192.168.29.129' port = 22 d = sftp(user,
host, port) d.addCallback(transfer) d.addErrback(err, "Problem with SFTP
transfer") d.addCallback(lambda ignored: reactor.stop()) reactor.run()
if __name__ == '__main__': main()<code> Best regards
SANFO
This is a multi-step process.
1) Open the StackOverflow page that you copied the above code from.2) Actually
read the whole answer.3) Read the documentation for the FileTransferClient
class. It's in the Twisted API documentation. It does have an openFile
method.4) Use the openFile method.5) read and/or write using the returned
object, which (as explained in the SO answer) will adhere to the ISFTPFile
interface. That also has documentation, which you should probably read.6) Once
you have done all those things, if you still have questions about _specific_
problems, feel free to ask them.
--Kevin Horn
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