Source code for linkcheck.checker.telneturl

# Copyright (C) 2000-2014 Bastian Kleineidam
#
# 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; either version 2 of the License, or
# (at your option) any later version.
#
# 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.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
"""
Handle telnet: links.
"""

import telnetlib
from . import urlbase
from .. import log, LOG_CHECK


[docs]def encode(s, encoding="iso-8859-1", errors="ignore"): """Encode telnet data like username and password.""" return s.encode(encoding, errors)
[docs]class TelnetUrl(urlbase.UrlBase): """ Url link with telnet scheme. """
[docs] def build_url(self): """ Call super.build_url(), set default telnet port and initialize the login credentials. """ super().build_url() # default port if self.port is None: self.port = 23 # set user/pass self.user, self.password = self.get_user_password()
[docs] def local_check(self): """ Warn about empty host names. Else call super.local_check(). """ if not self.host: self.set_result(_("Host is empty"), valid=False) return super().local_check()
[docs] def check_connection(self): """ Open a telnet connection and try to login. Expected login label is "login: ", expected password label is "Password: ". """ self.url_connection = telnetlib.Telnet(timeout=self.aggregate.config["timeout"]) if log.is_debug(LOG_CHECK): self.url_connection.set_debuglevel(1) self.url_connection.open(self.host, self.port) if self.user: self.url_connection.read_until(b"login: ", 10) self.url_connection.write(encode(self.user) + b"\n") if self.password: self.url_connection.read_until(b"Password: ", 10) self.url_connection.write(encode(self.password) + b"\n") # XXX how to tell if we are logged in?? self.url_connection.write(b"exit\n")
[docs] def can_get_content(self): """ Telnet URLs have no content. @return: False @rtype: bool """ return False