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Connecting and uploading a file to a server using pysftp


Connecting and uploading a file to a server using pysftp

By : Danny Watson
Date : November 20 2020, 03:01 PM
like below fixes the issue pysftp is just a wrapper around paramiko to abstract and simplify sftp operations, if you are having issues with pysftp you can use parmiko directly, since paramiko is a dependency of pysftp you will already have it installed.
code :
from paramiko import SSHClient

client = SSHClient()
client.set_missing_host_key_policy(paramiko.client.AutoAddPolicy)
client.connect('hostname', user='user', password='password')
sftp = client.open_sftp()
sftp.put(localpath, remotepath)


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pysftp AuthenticationException while connecting to server with private key

pysftp AuthenticationException while connecting to server with private key


By : William Lum
Date : March 29 2020, 07:55 AM
This might help you I could finally connect.
Converted the file to a .pem file using PuTTY. Passed this .pem file and kept the rest of the parameters the same as before.
code :
pysftp.Connection(host='hostname', username='username',
                   password='password', private_key='path to .pem file')
Error when connecting to SFTP server using Python Pysftp

Error when connecting to SFTP server using Python Pysftp


By : halukay
Date : March 29 2020, 07:55 AM
To fix the issue you can do Turns out the problem was due to me performing sftp.execute('ls') a couple lines down in the script. The server I was remoting onto only supported sftp commands and that command was forbidden.
Connecting to an SFTP server using pysftp and Python 3 with just the server fingerprint

Connecting to an SFTP server using pysftp and Python 3 with just the server fingerprint


By : Charles Sweet
Date : March 29 2020, 07:55 AM
like below fixes the issue Solution can be found at Python - pysftp / paramiko - Verify host key using its fingerprint but I had to alter it a bit to use Python 3.
code :
import hashlib as hl


def trim_fingerprint(fingerprint):
    #if fingerprint.startswith('ecdsa-sha2-nistp384 384 '):
        #return fingerprint[len('ecdsa-sha2-nistp384 384 '):]
    return fingerprint


def clean_fingerprint(fingerprint):
    #return trim_fingerprint(fingerprint).replace(':', '')
    return trim_fingerprint(fingerprint)

class FingerprintKey:

    def __init__(self, fingerprint):
        self.fingerprint = clean_fingerprint(fingerprint)

    def compare(self, other):
        if callable(getattr(other, "get_fingerprint", None)):
            return other.get_fingerprint() == self.fingerprint
        elif clean_fingerprint(other) == self.get_fingerprint():
            return True
        #elif hl.md5(other).digest().encode('hex') == self.fingerprint:
        #The line below is required for Python 3.  Above is Python 2.
        elif hl.md5(other).hexdigest() == self.fingerprint:
            return True
        else:
            return False

    def __cmp__(self, other):
        return self.compare(other)

    def __contains__(self, other):
        return self.compare(other)

    def __eq__(self, other):
        return self.compare(other)

    def __ne__(self, other):
        return not self.compare(other)

    def get_fingerprint(self):
        return self.fingerprint

    def get_name(self):
        return u'ecdsa-sha2-nistp384'

    def asbytes(self):
         # Note: This returns itself.
         #   That way when comparisons are done to asbytes return value,
         #   this class can handle the comparison.
        return self
options = pysftp.CnOpts()
options.hostkeys.clear()
options.hostkeys.add('www.sample.com', u'ecdsa-sha2-nistp384 384 ', AuthOnFingerPrint.FingerprintKey(serverkey))
Append to existing file on SFTP server via pysftp

Append to existing file on SFTP server via pysftp


By : user2128712
Date : March 29 2020, 07:55 AM
should help you out Your code works for me with OpenSSH SFTP server.
Maybe it's a bug in Core FTP server.
code :
with sftp.open('Account.txt', 'r+b') as f:
    f.seek(0, os.SEEK_END)
    data='google|33333|Phu|Wood||true|2018-09-21|2018-09-21|google'
    f.write(data+'\n')
"Failed to load HostKeys" warning while connecting to SFTP server with pysftp

"Failed to load HostKeys" warning while connecting to SFTP server with pysftp


By : moon
Date : March 29 2020, 07:55 AM
Hope that helps I believe it's a bug in pysftp. You get this everytime you use cnopts.hostkeys = None (despite the warning actually suggesting to use that).
Anyway, you should not use cnopts.hostkeys = None, you lose security by doing so. For a correct solution, see:
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