162 lines
5.3 KiB
Python
162 lines
5.3 KiB
Python
""" SFTP client """
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import logging
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import os
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from paramiko import AutoAddPolicy, SFTPAttributes, SSHClient
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from mylib.config import (
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BooleanOption,
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ConfigurableObject,
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IntegerOption,
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PasswordOption,
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StringOption,
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)
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log = logging.getLogger(__name__)
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class SFTPClient(ConfigurableObject):
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"""
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SFTP client
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This class abstract all interactions with the SFTP server.
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"""
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_config_name = "sftp"
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_config_comment = "SFTP"
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_defaults = {
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"host": "localhost",
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"port": 22,
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"user": None,
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"password": None,
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"known_hosts": os.path.expanduser("~/.ssh/known_hosts"),
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"auto_add_unknown_host_key": False,
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"just_try": False,
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}
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ssh_client = None
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sftp_client = None
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initial_directory = None
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# pylint: disable=arguments-differ,arguments-renamed
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def configure(self, **kwargs):
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"""Configure options on registered mylib.Config object"""
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section = super().configure(
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just_try=kwargs.pop("just_try", True),
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just_try_help=kwargs.pop(
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"just_try_help", "Just-try mode: do not really make change on remote SFTP host"
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),
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**kwargs,
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)
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section.add_option(
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StringOption,
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"host",
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default=self._defaults["host"],
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comment="SFTP server hostname/IP address",
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)
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section.add_option(
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IntegerOption, "port", default=self._defaults["port"], comment="SFTP server port"
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)
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section.add_option(
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StringOption,
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"user",
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default=self._defaults["user"],
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comment="SFTP authentication username",
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)
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section.add_option(
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PasswordOption,
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"password",
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default=self._defaults["password"],
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comment='SFTP authentication password (set to "keyring" to use XDG keyring)',
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username_option="user",
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keyring_value="keyring",
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)
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section.add_option(
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StringOption,
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"known_hosts",
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default=self._defaults["known_hosts"],
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comment="SFTP known_hosts filepath",
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)
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section.add_option(
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BooleanOption,
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"auto_add_unknown_host_key",
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default=self._defaults["auto_add_unknown_host_key"],
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comment="Auto add unknown host key",
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)
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return section
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def initialize(self, loaded_config=None):
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"""Configuration initialized hook"""
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super().__init__(loaded_config=loaded_config)
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def connect(self):
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"""Connect to SFTP server"""
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if self.ssh_client:
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return
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host = self._get_option("host")
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port = self._get_option("port")
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log.info("Connect to SFTP server %s:%d", host, port)
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self.ssh_client = SSHClient()
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if self._get_option("known_hosts"):
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self.ssh_client.load_host_keys(self._get_option("known_hosts"))
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if self._get_option("auto_add_unknown_host_key"):
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log.debug("Set missing host key policy to auto-add")
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self.ssh_client.set_missing_host_key_policy(AutoAddPolicy())
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self.ssh_client.connect(
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host,
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port=port,
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username=self._get_option("user"),
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password=self._get_option("password"),
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)
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self.sftp_client = self.ssh_client.open_sftp()
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self.initial_directory = self.sftp_client.getcwd()
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if self.initial_directory:
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log.debug("Initial remote directory: '%s'", self.initial_directory)
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else:
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log.debug("Fail to retreive remote directory, use empty string instead")
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self.initial_directory = ""
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def get_file(self, remote_filepath, local_filepath):
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"""Retrieve a file from SFTP server"""
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self.connect()
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log.debug("Retreive file '%s' to '%s'", remote_filepath, local_filepath)
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return self.sftp_client.get(remote_filepath, local_filepath) is None
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def open_file(self, remote_filepath, mode="r"):
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"""Remotly open a file on SFTP server"""
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self.connect()
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log.debug("Remotly open file '%s'", remote_filepath)
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return self.sftp_client.open(remote_filepath, mode=mode)
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def upload_file(self, filepath, remote_directory=None):
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"""Upload a file on SFTP server"""
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self.connect()
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remote_filepath = os.path.join(
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remote_directory if remote_directory else self.initial_directory,
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os.path.basename(filepath),
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)
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log.debug("Upload file '%s' to '%s'", filepath, remote_filepath)
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if self._just_try:
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log.debug(
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"Just-try mode: do not really upload file '%s' to '%s'", filepath, remote_filepath
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)
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return True
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result = self.sftp_client.put(filepath, remote_filepath)
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return isinstance(result, SFTPAttributes)
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def remove_file(self, filepath):
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"""Remove a file on SFTP server"""
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self.connect()
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log.debug("Remove file '%s'", filepath)
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if self._just_try:
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log.debug("Just - try mode: do not really remove file '%s'", filepath)
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return True
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return self.sftp_client.remove(filepath) is None
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def close(self):
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"""Close SSH/SFTP connection"""
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log.debug("Close connection")
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self.ssh_client.close()
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