sopel.irc.Bot.error() - Code Metrics - Inspection of "Merge pull request #1678 from Exirel/rework-loggin..." - sopel-irc/sopel - Measure and Improve Code Quality continuously with Scrutinizer

Completed

Push — master ( ac2779...d89639 )

by dgw

created 2019-10-08 07:38 UTC

sopel.irc.Bot.error() B

↳ Parent: sopel.irc

Complexity

Conditions

Size

Total Lines	15
Code Lines	10

Duplication

Lines	0
Ratio	0 %

Importance

Changes

Metric	Value
eloc	10
dl	0
loc	15
rs	8.6666
c	0
b	0
f	0
cc	6
nop	3

# coding=utf-8
# irc.py - An Utility IRC Bot
# Copyright 2008, Sean B. Palmer, inamidst.com
# Copyright 2012, Elsie Powell, http://embolalia.com
# Copyright © 2012, Elad Alfassa <[email protected]>
#
# Licensed under the Eiffel Forum License 2.
#
# When working on core IRC protocol related features, consult protocol
# documentation at http://www.irchelp.org/irchelp/rfc/
from __future__ import unicode_literals, absolute_import, print_function, division

import sys
import time
import socket
import asyncore
import asynchat
import os
import logging
from sopel.tools import Identifier
from sopel.trigger import PreTrigger
try:
    import ssl
    if not hasattr(ssl, 'match_hostname'):
        # Attempt to import ssl_match_hostname from python-backports
        import backports.ssl_match_hostname
        ssl.match_hostname = backports.ssl_match_hostname.match_hostname
        ssl.CertificateError = backports.ssl_match_hostname.CertificateError
    has_ssl = True
except ImportError:
    # no SSL support
    has_ssl = False

import errno
import threading
from datetime import datetime
if sys.version_info.major >= 3:
    unicode = str


__all__ = ['Bot']

LOGGER = logging.getLogger(__name__)


class Bot(asynchat.async_chat):
    def __init__(self, config):
        ca_certs = config.core.ca_certs

        asynchat.async_chat.__init__(self)
        self.set_terminator(b'\n')
        self.buffer = ''

        self.nick = Identifier(config.core.nick)
        """Sopel's current ``Identifier``. Changing this while Sopel is running is
        untested."""
        self.user = config.core.user
        """Sopel's user/ident."""
        self.name = config.core.name
        """Sopel's "real name", as used for whois."""

        self.stack = {}
        self.ca_certs = ca_certs
        self.enabled_capabilities = set()
        self.hasquit = False
        self.wantsrestart = False

        self.sending = threading.RLock()
        self.writing_lock = threading.Lock()
        self.raw = None

        # Right now, only accounting for two op levels.
        # This might be expanded later.
        # These lists are filled in startup.py, as of right now.
        # Are these even touched at all anymore? Remove in 7.0.
        self.ops = dict()
        """Deprecated. Use bot.channels instead."""
        self.halfplus = dict()
        """Deprecated. Use bot.channels instead."""
        self.voices = dict()
        """Deprecated. Use bot.channels instead."""

        # We need this to prevent error loops in handle_error
        self.error_count = 0

        self.connection_registered = False
        """ Set to True when a server has accepted the client connection and
        messages can be sent and received. """

        # Work around bot.connecting missing in Python older than 2.7.4
        if not hasattr(self, "connecting"):
            self.connecting = False

    def log_raw(self, line, prefix):
        """Log raw line to the raw log."""
        if not self.config.core.log_raw:
            return
        logger = logging.getLogger('sopel.raw')
        logger.info('\t'.join([prefix, line.strip()]))

    def safe(self, string):
        """Remove newlines from a string."""
        if sys.version_info.major >= 3 and isinstance(string, bytes):
            string = string.decode("utf8")
        elif sys.version_info.major < 3:
            if not isinstance(string, unicode):

                string = unicode(string, encoding='utf8')
        string = string.replace('\n', '')
        string = string.replace('\r', '')
        return string

    def write(self, args, text=None):
        args = [self.safe(arg) for arg in args]
        if text is not None:
            text = self.safe(text)
        try:
            # Blocking lock, can't send two things at a time
            self.writing_lock.acquire()

            # From RFC2812 Internet Relay Chat: Client Protocol
            # Section 2.3
            #
            # https://tools.ietf.org/html/rfc2812.html
            #
            # IRC messages are always lines of characters terminated with a
            # CR-LF (Carriage Return - Line Feed) pair, and these messages SHALL
            # NOT exceed 512 characters in length, counting all characters
            # including the trailing CR-LF. Thus, there are 510 characters
            # maximum allowed for the command and its parameters. There is no
            # provision for continuation of message lines.

            max_length = unicode_max_length = 510
            if text is not None:
                temp = (' '.join(args) + ' :' + text)
            else:
                temp = ' '.join(args)

            # The max length of 512 is in bytes, not unicode
            while len(temp.encode('utf-8')) > max_length:
                temp = temp[:unicode_max_length]
                unicode_max_length = unicode_max_length - 1

            # Ends the message with CR-LF
            temp = temp + '\r\n'

            # Log and output the message
            self.log_raw(temp, '>>')
            self.send(temp.encode('utf-8'))
        finally:
            self.writing_lock.release()

        # Simulate echo-message
        if ('echo-message' not in self.enabled_capabilities and
                args[0].upper() in ['PRIVMSG', 'NOTICE']):
            # Use the hostmask we think the IRC server is using for us,
            # or something reasonable if that's not available
            host = 'localhost'
            if self.config.core.bind_host:
                host = self.config.core.bind_host
            else:
                try:
                    host = self.hostmask
                except KeyError:
                    pass  # we tried, and that's good enough

            pretrigger = PreTrigger(
                self.nick,
                ":{0}!{1}@{2} {3}".format(self.nick, self.user, host, temp)

            )
            self.dispatch(pretrigger)

    def run(self, host, port=6667):
        try:
            self.initiate_connect(host, port)
        except socket.error as e:
            LOGGER.exception('Connection error: %s', e)
            self.handle_close()

    def initiate_connect(self, host, port):
        LOGGER.info('Connecting to %s:%s...', host, port)
        source_address = ((self.config.core.bind_host, 0)
                          if self.config.core.bind_host else None)
        self.set_socket(socket.create_connection((host, port),
                        source_address=source_address))
        if self.config.core.use_ssl and has_ssl:
            self.send = self._ssl_send
            self.recv = self._ssl_recv
        elif not has_ssl and self.config.core.use_ssl:
            LOGGER.warning(
                'SSL is not available on your system; '
                'attempting connection without it')
        self.connect((host, port))
        try:
            asyncore.loop()
        except KeyboardInterrupt:
            LOGGER.warning('KeyboardInterrupt')
            self.quit('KeyboardInterrupt')

    def restart(self, message):
        """Disconnect from IRC and restart the bot."""
        self.write(['QUIT'], message)
        self.wantsrestart = True
        self.hasquit = True

    def quit(self, message):
        """Disconnect from IRC and close the bot."""
        if self.connected:  # Only send QUIT message if socket is open
            self.write(['QUIT'], message)
        self.hasquit = True
        # Wait for acknowledgement from the server. By RFC 2812 it should be
        # an ERROR msg, but many servers just close the connection. Either way
        # is fine by us.
        # Closing the connection now would mean that stuff in the buffers that
        # has not yet been processed would never be processed. It would also
        # release the main thread, which is problematic because whomever called
        # quit might still want to do something before main thread quits.

    def handle_close(self):
        self.connection_registered = False

        if hasattr(self, '_shutdown'):
            self._shutdown()

        # This will eventually call asyncore dispatchers close method, which
        # will release the main thread. This should be called last to avoid
        # race conditions.
        if self.socket:
            LOGGER.debug('Closing socket')
            self.close()

        LOGGER.info('Closed!')

    def handle_connect(self):
        """
        Connect to IRC server, handle TLS and authenticate
        user if an account exists.
        """
        # handle potential TLS connection
        if self.config.core.use_ssl and has_ssl:
            if not self.config.core.verify_ssl:
                self.ssl = ssl.wrap_socket(self.socket,
                                           do_handshake_on_connect=True,
                                           suppress_ragged_eofs=True)
            else:
                self.ssl = ssl.wrap_socket(self.socket,
                                           do_handshake_on_connect=True,
                                           suppress_ragged_eofs=True,
                                           cert_reqs=ssl.CERT_REQUIRED,
                                           ca_certs=self.ca_certs)
                # connect to host specified in config first
                try:
                    ssl.match_hostname(self.ssl.getpeercert(), self.config.core.host)
                except ssl.CertificateError:
                    # the host in config and certificate don't match
                    LOGGER.error("hostname mismatch between configuration and certificate")
                    # check (via exception) if a CNAME matches as a fallback
                    has_matched = False
                    for hostname in self._get_cnames(self.config.core.host):
                        try:
                            ssl.match_hostname(self.ssl.getpeercert(), hostname)
                            LOGGER.warning("using {0} instead of {1} for TLS connection"
                                           .format(hostname, self.config.core.host))
                            has_matched = True
                            break
                        except ssl.CertificateError:
                            pass
                    if not has_matched:
                        # everything is broken
                        LOGGER.error("invalid certificate, no hostname matches")
                        if hasattr(self.config.core, 'pid_file_path'):
                            os.unlink(self.config.core.pid_file_path)
                            os._exit(1)
            self.set_socket(self.ssl)

        # Request list of server capabilities. IRCv3 servers will respond with
        # CAP * LS (which we handle in coretasks). v2 servers will respond with
        # 421 Unknown command, which we'll ignore
        self.write(('CAP', 'LS', '302'))

        # authenticate account if needed
        if self.config.core.auth_method == 'server':
            self.write(('PASS', self.config.core.auth_password))
        elif self.config.core.server_auth_method == 'server':
            self.write(('PASS', self.config.core.server_auth_password))
        self.write(('NICK', self.nick))
        self.write(('USER', self.user, '+iw', self.nick), self.name)

        # maintain connection
        LOGGER.info('Connected.')
        self.last_ping_time = datetime.now()
        timeout_check_thread = threading.Thread(target=self._timeout_check)
        timeout_check_thread.daemon = True
        timeout_check_thread.start()
        ping_thread = threading.Thread(target=self._send_ping)
        ping_thread.daemon = True
        ping_thread.start()

    def _get_cnames(self, domain):
        """
        Determine the CNAMEs for a given domain.

        :param domain: domain to check
        :type domain: str
        :returns: list (of str)
        """
        import dns.resolver
        cnames = []
        try:
            answer = dns.resolver.query(domain, "CNAME")
        except dns.resolver.NoAnswer:
            return []
        for data in answer:
            if isinstance(data, dns.rdtypes.ANY.CNAME.CNAME):
                cname = data.to_text()[:-1]
                cnames.append(cname)
        return cnames

    def _timeout_check(self):
        while self.connected or self.connecting:
            if (datetime.now() - self.last_ping_time).seconds > int(self.config.core.timeout):
                LOGGER.warning(
                    'Ping timeout reached after %s seconds; '
                    'closing connection',
                    self.config.core.timeout)
                self.handle_close()
                break
            else:
                time.sleep(int(self.config.core.timeout))

    def _send_ping(self):
        while self.connected or self.connecting:
            if self.connected and (datetime.now() - self.last_ping_time).seconds > int(self.config.core.timeout) / 2:
                try:
                    self.write(('PING', self.config.core.host))
                except socket.error:
                    pass
            time.sleep(int(self.config.core.timeout) / 2)

    def _ssl_send(self, data):
        """Replacement for self.send() during SSL connections."""
        try:
            result = self.socket.send(data)
            return result
        except ssl.SSLError as why:
            if why[0] in (asyncore.EWOULDBLOCK, errno.ESRCH):
                return 0
            else:
                raise why
            return 0

    def _ssl_recv(self, buffer_size):
        """Replacement for self.recv() during SSL connections.

        From: http://evanfosmark.com/2010/09/ssl-support-in-asynchatasync_chat

        """
        try:
            data = self.socket.read(buffer_size)
            if not data:
                self.handle_close()
                return b''
            return data
        except ssl.SSLError as why:
            if why[0] in (asyncore.ECONNRESET, asyncore.ENOTCONN,
                          asyncore.ESHUTDOWN):
                self.handle_close()
                return ''
            elif why[0] == errno.ENOENT:
                # Required in order to keep it non-blocking
                return b''
            else:
                raise

    def collect_incoming_data(self, data):
        # We can't trust clients to pass valid unicode.
        try:
            data = unicode(data, encoding='utf-8')

        except UnicodeDecodeError:
            # not unicode, let's try cp1252
            try:
                data = unicode(data, encoding='cp1252')
            except UnicodeDecodeError:
                # Okay, let's try ISO8859-1
                try:
                    data = unicode(data, encoding='iso8859-1')
                except UnicodeDecodeError:
                    # Discard line if encoding is unknown
                    return

        if data:
            self.log_raw(data, '<<')
        self.buffer += data

    def found_terminator(self):
        line = self.buffer
        if line.endswith('\r'):
            line = line[:-1]
        self.buffer = ''
        self.last_ping_time = datetime.now()
        pretrigger = PreTrigger(self.nick, line)
        if all(cap not in self.enabled_capabilities for cap in ['account-tag', 'extended-join']):
            pretrigger.tags.pop('account', None)

        if pretrigger.event == 'PING':
            self.write(('PONG', pretrigger.args[-1]))
        elif pretrigger.event == 'ERROR':
            LOGGER.error("ERROR received from server: %s", pretrigger.args[-1])
            if self.hasquit:
                self.close_when_done()
        elif pretrigger.event == '433':
            LOGGER.error('Nickname already in use!')
            self.handle_close()

        self.dispatch(pretrigger)

    def dispatch(self, pretrigger):
        pass

    def error(self, trigger=None, exception=None):
        """Called internally when a module causes an error."""
        message = 'Unexpected error'
        if exception:
            message = '{} ({})'.format(message, exception)

        if trigger:
            message = '{} from {} at {}. Message was: {}'.format(
                message, trigger.nick, str(datetime.now()), trigger.group(0)
            )

        LOGGER.exception(message)

        if trigger and self.config.core.reply_errors and trigger.sender is not None:
            self.say(message, trigger.sender)

    def handle_error(self):
        """Handle any uncaptured error in the core.

        This method is an override of :meth:`asyncore.dispatcher.handle_error`,
        the :class:`asynchat.async_chat` being a subclass of
        :class:`asyncore.dispatcher`.
        """
        LOGGER.error('Fatal error in core; please review exception log.')

        err_log = logging.getLogger('sopel.exceptions')
        err_log.error(
            'Fatal error in core; handle_error() was called.\n'
            'Last raw line was: %s\n'
            'Buffer:\n%s\n',
            self.raw, self.buffer
        )
        err_log.exception('Fatal error traceback')
        err_log.error('----------------------------------------')

        if self.error_count > 10:
            # quit if too many errors
            if (datetime.now() - self.last_error_timestamp).seconds < 5:
                LOGGER.error("Too many errors; can't continue")
                os._exit(1)
            # TODO: should we reset error_count?

        self.last_error_timestamp = datetime.now()
        self.error_count = self.error_count + 1


1			# coding=utf-8
2			# irc.py - An Utility IRC Bot
3			# Copyright 2008, Sean B. Palmer, inamidst.com
4			# Copyright 2012, Elsie Powell, http://embolalia.com
5			# Copyright © 2012, Elad Alfassa <[email protected]>
6			#
7			# Licensed under the Eiffel Forum License 2.
8			#
9			# When working on core IRC protocol related features, consult protocol
10			# documentation at http://www.irchelp.org/irchelp/rfc/
11			from __future__ import unicode_literals, absolute_import, print_function, division
12
13			import sys
14			import time
15			import socket
16			import asyncore
17			import asynchat
18			import os
19			import logging
20			from sopel.tools import Identifier
21			from sopel.trigger import PreTrigger
22			try:
23			import ssl
24			if not hasattr(ssl, 'match_hostname'):
25			# Attempt to import ssl_match_hostname from python-backports
26			import backports.ssl_match_hostname
27			ssl.match_hostname = backports.ssl_match_hostname.match_hostname
28			ssl.CertificateError = backports.ssl_match_hostname.CertificateError
29			has_ssl = True
30			except ImportError:
31			# no SSL support
32			has_ssl = False
33
34			import errno
35			import threading
36			from datetime import datetime
37			if sys.version_info.major >= 3:
38			unicode = str
39
40
41			__all__ = ['Bot']
42
43			LOGGER = logging.getLogger(__name__)
44
45
46			class Bot(asynchat.async_chat):
47			def __init__(self, config):
48			ca_certs = config.core.ca_certs
49
50			asynchat.async_chat.__init__(self)
51			self.set_terminator(b'\n')
52			self.buffer = ''
53
54			self.nick = Identifier(config.core.nick)
55			"""Sopel's current ``Identifier``. Changing this while Sopel is running is
56			untested."""
57			self.user = config.core.user
58			"""Sopel's user/ident."""
59			self.name = config.core.name
60			"""Sopel's "real name", as used for whois."""
61
62			self.stack = {}
63			self.ca_certs = ca_certs
64			self.enabled_capabilities = set()
65			self.hasquit = False
66			self.wantsrestart = False
67
68			self.sending = threading.RLock()
69			self.writing_lock = threading.Lock()
70			self.raw = None
71
72			# Right now, only accounting for two op levels.
73			# This might be expanded later.
74			# These lists are filled in startup.py, as of right now.
75			# Are these even touched at all anymore? Remove in 7.0.
76			self.ops = dict()
77			"""Deprecated. Use bot.channels instead."""
78			self.halfplus = dict()
79			"""Deprecated. Use bot.channels instead."""
80			self.voices = dict()
81			"""Deprecated. Use bot.channels instead."""
82
83			# We need this to prevent error loops in handle_error
84			self.error_count = 0
85
86			self.connection_registered = False
87			""" Set to True when a server has accepted the client connection and
88			messages can be sent and received. """
89
90			# Work around bot.connecting missing in Python older than 2.7.4
91			if not hasattr(self, "connecting"):
92			self.connecting = False
93
94			def log_raw(self, line, prefix):
95			"""Log raw line to the raw log."""
96			if not self.config.core.log_raw:
97			return
98			logger = logging.getLogger('sopel.raw')
99			logger.info('\t'.join([prefix, line.strip()]))
100
101			def safe(self, string):
102			"""Remove newlines from a string."""
103			if sys.version_info.major >= 3 and isinstance(string, bytes):
104			string = string.decode("utf8")
105			elif sys.version_info.major < 3:
106			if not isinstance(string, unicode):
			0 ignored issues – show introduced 2018-05-13 16:57 UTC by Report Bug Copy Issue Report The variable `unicode` does not seem to be defined in case `sys.version_info.major >= 3` on line `37` is `False`. Are you sure this can never be the case? Loading history...
107			string = unicode(string, encoding='utf8')
108			string = string.replace('\n', '')
109			string = string.replace('\r', '')
110			return string
111
112			def write(self, args, text=None):
113			args = [self.safe(arg) for arg in args]
114			if text is not None:
115			text = self.safe(text)
116			try:
117			# Blocking lock, can't send two things at a time
118			self.writing_lock.acquire()
119
120			# From RFC2812 Internet Relay Chat: Client Protocol
121			# Section 2.3
122			#
123			# https://tools.ietf.org/html/rfc2812.html
124			#
125			# IRC messages are always lines of characters terminated with a
126			# CR-LF (Carriage Return - Line Feed) pair, and these messages SHALL
127			# NOT exceed 512 characters in length, counting all characters
128			# including the trailing CR-LF. Thus, there are 510 characters
129			# maximum allowed for the command and its parameters. There is no
130			# provision for continuation of message lines.
131
132			max_length = unicode_max_length = 510
133			if text is not None:
134			temp = (' '.join(args) + ' :' + text)
135			else:
136			temp = ' '.join(args)
137
138			# The max length of 512 is in bytes, not unicode
139			while len(temp.encode('utf-8')) > max_length:
140			temp = temp[:unicode_max_length]
141			unicode_max_length = unicode_max_length - 1
142
143			# Ends the message with CR-LF
144			temp = temp + '\r\n'
145
146			# Log and output the message
147			self.log_raw(temp, '>>')
148			self.send(temp.encode('utf-8'))
149			finally:
150			self.writing_lock.release()
151
152			# Simulate echo-message
153			if ('echo-message' not in self.enabled_capabilities and
154			args[0].upper() in ['PRIVMSG', 'NOTICE']):
155			# Use the hostmask we think the IRC server is using for us,
156			# or something reasonable if that's not available
157			host = 'localhost'
158			if self.config.core.bind_host:
159			host = self.config.core.bind_host
160			else:
161			try:
162			host = self.hostmask
163			except KeyError:
164			pass # we tried, and that's good enough
165
166			pretrigger = PreTrigger(
167			self.nick,
168			":{0}!{1}@{2} {3}".format(self.nick, self.user, host, temp)
			0 ignored issues – show introduced 2019-04-30 20:37 UTC by Report Bug Copy Issue Report The variable `temp` does not seem to be defined for all execution paths. Loading history...
169			)
170			self.dispatch(pretrigger)
171
172			def run(self, host, port=6667):
173			try:
174			self.initiate_connect(host, port)
175			except socket.error as e:
176			LOGGER.exception('Connection error: %s', e)
177			self.handle_close()
178
179			def initiate_connect(self, host, port):
180			LOGGER.info('Connecting to %s:%s...', host, port)
181			source_address = ((self.config.core.bind_host, 0)
182			if self.config.core.bind_host else None)
183			self.set_socket(socket.create_connection((host, port),
184			source_address=source_address))
185			if self.config.core.use_ssl and has_ssl:
186			self.send = self._ssl_send
187			self.recv = self._ssl_recv
188			elif not has_ssl and self.config.core.use_ssl:
189			LOGGER.warning(
190			'SSL is not available on your system; '
191			'attempting connection without it')
192			self.connect((host, port))
193			try:
194			asyncore.loop()
195			except KeyboardInterrupt:
196			LOGGER.warning('KeyboardInterrupt')
197			self.quit('KeyboardInterrupt')
198
199			def restart(self, message):
200			"""Disconnect from IRC and restart the bot."""
201			self.write(['QUIT'], message)
202			self.wantsrestart = True
203			self.hasquit = True
204
205			def quit(self, message):
206			"""Disconnect from IRC and close the bot."""
207			if self.connected: # Only send QUIT message if socket is open
208			self.write(['QUIT'], message)
209			self.hasquit = True
210			# Wait for acknowledgement from the server. By RFC 2812 it should be
211			# an ERROR msg, but many servers just close the connection. Either way
212			# is fine by us.
213			# Closing the connection now would mean that stuff in the buffers that
214			# has not yet been processed would never be processed. It would also
215			# release the main thread, which is problematic because whomever called
216			# quit might still want to do something before main thread quits.
217
218			def handle_close(self):
219			self.connection_registered = False
220
221			if hasattr(self, '_shutdown'):
222			self._shutdown()
223
224			# This will eventually call asyncore dispatchers close method, which
225			# will release the main thread. This should be called last to avoid
226			# race conditions.
227			if self.socket:
228			LOGGER.debug('Closing socket')
229			self.close()
230
231			LOGGER.info('Closed!')
232
233			def handle_connect(self):
234			"""
235			Connect to IRC server, handle TLS and authenticate
236			user if an account exists.
237			"""
238			# handle potential TLS connection
239			if self.config.core.use_ssl and has_ssl:
240			if not self.config.core.verify_ssl:
241			self.ssl = ssl.wrap_socket(self.socket,
242			do_handshake_on_connect=True,
243			suppress_ragged_eofs=True)
244			else:
245			self.ssl = ssl.wrap_socket(self.socket,
246			do_handshake_on_connect=True,
247			suppress_ragged_eofs=True,
248			cert_reqs=ssl.CERT_REQUIRED,
249			ca_certs=self.ca_certs)
250			# connect to host specified in config first
251			try:
252			ssl.match_hostname(self.ssl.getpeercert(), self.config.core.host)
253			except ssl.CertificateError:
254			# the host in config and certificate don't match
255			LOGGER.error("hostname mismatch between configuration and certificate")
256			# check (via exception) if a CNAME matches as a fallback
257			has_matched = False
258			for hostname in self._get_cnames(self.config.core.host):
259			try:
260			ssl.match_hostname(self.ssl.getpeercert(), hostname)
261			LOGGER.warning("using {0} instead of {1} for TLS connection"
262			.format(hostname, self.config.core.host))
263			has_matched = True
264			break
265			except ssl.CertificateError:
266			pass
267			if not has_matched:
268			# everything is broken
269			LOGGER.error("invalid certificate, no hostname matches")
270			if hasattr(self.config.core, 'pid_file_path'):
271			os.unlink(self.config.core.pid_file_path)
272			os._exit(1)
273			self.set_socket(self.ssl)
274
275			# Request list of server capabilities. IRCv3 servers will respond with
276			# CAP * LS (which we handle in coretasks). v2 servers will respond with
277			# 421 Unknown command, which we'll ignore
278			self.write(('CAP', 'LS', '302'))
279
280			# authenticate account if needed
281			if self.config.core.auth_method == 'server':
282			self.write(('PASS', self.config.core.auth_password))
283			elif self.config.core.server_auth_method == 'server':
284			self.write(('PASS', self.config.core.server_auth_password))
285			self.write(('NICK', self.nick))
286			self.write(('USER', self.user, '+iw', self.nick), self.name)
287
288			# maintain connection
289			LOGGER.info('Connected.')
290			self.last_ping_time = datetime.now()
291			timeout_check_thread = threading.Thread(target=self._timeout_check)
292			timeout_check_thread.daemon = True
293			timeout_check_thread.start()
294			ping_thread = threading.Thread(target=self._send_ping)
295			ping_thread.daemon = True
296			ping_thread.start()
297
298			def _get_cnames(self, domain):
299			"""
300			Determine the CNAMEs for a given domain.
301
302			:param domain: domain to check
303			:type domain: str
304			:returns: list (of str)
305			"""
306			import dns.resolver
307			cnames = []
308			try:
309			answer = dns.resolver.query(domain, "CNAME")
310			except dns.resolver.NoAnswer:
311			return []
312			for data in answer:
313			if isinstance(data, dns.rdtypes.ANY.CNAME.CNAME):
314			cname = data.to_text()[:-1]
315			cnames.append(cname)
316			return cnames
317
318			def _timeout_check(self):
319			while self.connected or self.connecting:
320			if (datetime.now() - self.last_ping_time).seconds > int(self.config.core.timeout):
321			LOGGER.warning(
322			'Ping timeout reached after %s seconds; '
323			'closing connection',
324			self.config.core.timeout)
325			self.handle_close()
326			break
327			else:
328			time.sleep(int(self.config.core.timeout))
329
330			def _send_ping(self):
331			while self.connected or self.connecting:
332			if self.connected and (datetime.now() - self.last_ping_time).seconds > int(self.config.core.timeout) / 2:
333			try:
334			self.write(('PING', self.config.core.host))
335			except socket.error:
336			pass
337			time.sleep(int(self.config.core.timeout) / 2)
338
339			def _ssl_send(self, data):
340			"""Replacement for self.send() during SSL connections."""
341			try:
342			result = self.socket.send(data)
343			return result
344			except ssl.SSLError as why:
345			if why[0] in (asyncore.EWOULDBLOCK, errno.ESRCH):
346			return 0
347			else:
348			raise why
349			return 0
350
351			def _ssl_recv(self, buffer_size):
352			"""Replacement for self.recv() during SSL connections.
353
354			From: http://evanfosmark.com/2010/09/ssl-support-in-asynchatasync_chat
355
356			"""
357			try:
358			data = self.socket.read(buffer_size)
359			if not data:
360			self.handle_close()
361			return b''
362			return data
363			except ssl.SSLError as why:
364			if why[0] in (asyncore.ECONNRESET, asyncore.ENOTCONN,
365			asyncore.ESHUTDOWN):
366			self.handle_close()
367			return ''
368			elif why[0] == errno.ENOENT:
369			# Required in order to keep it non-blocking
370			return b''
371			else:
372			raise
373
374			def collect_incoming_data(self, data):
375			# We can't trust clients to pass valid unicode.
376			try:
377			data = unicode(data, encoding='utf-8')
			0 ignored issues – show introduced 2018-05-13 16:57 UTC by Report Bug Copy Issue Report The variable `unicode` does not seem to be defined in case `sys.version_info.major >= 3` on line `37` is `False`. Are you sure this can never be the case? Loading history...
378			except UnicodeDecodeError:
379			# not unicode, let's try cp1252
380			try:
381			data = unicode(data, encoding='cp1252')
382			except UnicodeDecodeError:
383			# Okay, let's try ISO8859-1
384			try:
385			data = unicode(data, encoding='iso8859-1')
386			except UnicodeDecodeError:
387			# Discard line if encoding is unknown
388			return
389
390			if data:
391			self.log_raw(data, '<<')
392			self.buffer += data
393
394			def found_terminator(self):
395			line = self.buffer
396			if line.endswith('\r'):
397			line = line[:-1]
398			self.buffer = ''
399			self.last_ping_time = datetime.now()
400			pretrigger = PreTrigger(self.nick, line)
401			if all(cap not in self.enabled_capabilities for cap in ['account-tag', 'extended-join']):
402			pretrigger.tags.pop('account', None)
403
404			if pretrigger.event == 'PING':
405			self.write(('PONG', pretrigger.args[-1]))
406			elif pretrigger.event == 'ERROR':
407			LOGGER.error("ERROR received from server: %s", pretrigger.args[-1])
408			if self.hasquit:
409			self.close_when_done()
410			elif pretrigger.event == '433':
411			LOGGER.error('Nickname already in use!')
412			self.handle_close()
413
414			self.dispatch(pretrigger)
415
416			def dispatch(self, pretrigger):
417			pass
418
419			def error(self, trigger=None, exception=None):
420			"""Called internally when a module causes an error."""
421			message = 'Unexpected error'
422			if exception:
423			message = '{} ({})'.format(message, exception)
424
425			if trigger:
426			message = '{} from {} at {}. Message was: {}'.format(
427			message, trigger.nick, str(datetime.now()), trigger.group(0)
428			)
429
430			LOGGER.exception(message)
431
432			if trigger and self.config.core.reply_errors and trigger.sender is not None:
433			self.say(message, trigger.sender)
434
435			def handle_error(self):
436			"""Handle any uncaptured error in the core.
437
438			This method is an override of :meth:`asyncore.dispatcher.handle_error`,
439			the :class:`asynchat.async_chat` being a subclass of
440			:class:`asyncore.dispatcher`.
441			"""
442			LOGGER.error('Fatal error in core; please review exception log.')
443
444			err_log = logging.getLogger('sopel.exceptions')
445			err_log.error(
446			'Fatal error in core; handle_error() was called.\n'
447			'Last raw line was: %s\n'
448			'Buffer:\n%s\n',
449			self.raw, self.buffer
450			)
451			err_log.exception('Fatal error traceback')
452			err_log.error('----------------------------------------')
453
454			if self.error_count > 10:
455			# quit if too many errors
456			if (datetime.now() - self.last_error_timestamp).seconds < 5:
457			LOGGER.error("Too many errors; can't continue")
458			os._exit(1)
459			# TODO: should we reset error_count?
460
461			self.last_error_timestamp = datetime.now()
462			self.error_count = self.error_count + 1
463

sopel-irc / sopel

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