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# Copyright(C) 2007 INL
# Written by Victor Stinner <victor.stinner@inl.fr>
#
# $Id$
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, version 3 of the License.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
"""
NuclientError and Nuclient classes: Python object API for libnuclient
"""
from nuclient import (
nuclient_error_p,
nu_client_error_init, nu_client_error_destroy,
nu_client_global_init, nu_client_global_deinit,
nu_client_new, nu_client_delete,
nu_client_check, nu_client_set_verbose,
nu_client_connect,
nu_client_strerror,
DEFAULT_PORT)
from ctypes import byref
class NuclientError(RuntimeError):
def __init__(self, when, error):
message = "%s! Problem: %s" % (when, nu_client_strerror(error))
RuntimeError.__init__(self, message)
class Nuclient:
def __init__(self, username, password, diffie_hellman=True):
self._init_error = False
self._global_init = False
self.session = None
assert isinstance(username, unicode)
assert isinstance(password, unicode)
self.username = username
self.password = password
self.error = nuclient_error_p()
self.init()
self.session = nu_client_new(
self.username.encode("utf8"), self.password.encode("utf8"),
diffie_hellman, self.error)
if not self.session:
raise NuclientError("nu_client_new", self.error)
def init(self):
# Allocate error structure
if not self._init_error:
if nu_client_error_init(byref(self.error)) != 0:
raise MemoryError("Cannot init error structure!")
self._init_error = True
# global libnuclient init
if not self._global_init:
if not nu_client_global_init(self.error):
raise NuclientError("Unable to initiate nuclient library!", self.error)
self._global_init = True
def deinit(self):
if self._global_init:
nu_client_global_deinit()
self._global_init = False
if self._init_error:
nu_client_error_destroy(self.error)
self._init_error = False
if self.session:
nu_client_delete(self.session)
self.session = None
def __del__(self):
self.deinit()
def connect(self, hostname, port=None):
if not port:
port = str(DEFAULT_PORT)
assert isinstance(hostname, str)
assert isinstance(port, str)
ok = nu_client_connect(self.session, hostname, port, self.error)
if not ok:
raise NuclientError("Unable to connect to %s:%s" % (hostname, service),
self.error)
def verbose(self, enabled):
assert isinstance(enabled, bool)
nu_client_set_verbose(self.session, enabled)
def check(self):
connected = nu_client_check(self.session, self.error)
return (connected == 1)
__all__ = ("NuclientError", "Nuclient")
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