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""" |
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syslog2irc.processor |
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~~~~~~~~~~~~~~~~~~~~ |
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:Copyright: 2007-2021 Jochen Kupperschmidt |
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:License: MIT, see LICENSE for details. |
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""" |
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import logging |
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from time import sleep |
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from typing import Any, Callable, Iterator, Optional, Set, Tuple |
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from syslogmp import Message as SyslogMessage |
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from .router import Router |
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from .signals import ( |
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irc_channel_joined, |
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message_approved, |
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message_received, |
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syslog_message_received, |
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) |
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MESSAGE_TEXT_ENCODING = 'utf-8' |
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logger = logging.getLogger(__name__) |
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class Processor: |
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def __init__( |
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self, |
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router: Router, |
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syslog_message_formatter: Optional[ |
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Callable[[SyslogMessage], str] |
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] = None, |
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) -> None: |
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super(Processor, self).__init__() |
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self.router = router |
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if syslog_message_formatter is not None: |
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self.syslog_message_formatter = syslog_message_formatter |
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else: |
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self.syslog_message_formatter = format_syslog_message |
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def connect_to_signals(self) -> None: |
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irc_channel_joined.connect(self.router.enable_channel) |
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syslog_message_received.connect(self.handle_syslog_message) |
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message_received.connect(self.handle_message) |
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def handle_syslog_message( |
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self, |
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port: int, |
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source_address: Optional[Tuple[str, int]] = None, |
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message: Optional[SyslogMessage] = None, |
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) -> None: |
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"""Process an incoming syslog message.""" |
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channel_names = self.router.get_channel_names_for_port(port) |
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formatted_source = f'{source_address[0]}:{source_address[1]:d}' |
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formatted_message = self.syslog_message_formatter(message) |
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text = f'{formatted_source} {formatted_message}' |
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message_received.send( |
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channel_names=channel_names, |
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text=text, |
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source_address=source_address, |
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) |
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1 |
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def handle_message( |
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self, |
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sender: Any, |
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*, |
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channel_names: Optional[Set[str]] = None, |
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text: Optional[str] = None, |
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source_address: Optional[Tuple[str, int]] = None, |
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) -> None: |
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"""Process an incoming message.""" |
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for channel_name in channel_names: |
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if self.router.is_channel_enabled(channel_name): |
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message_approved.send(channel_name=channel_name, text=text) |
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1 |
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def run(self, seconds_to_sleep: float = 0.5) -> None: |
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"""Run the main loop.""" |
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try: |
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while True: |
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sleep(seconds_to_sleep) |
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except KeyboardInterrupt: |
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pass |
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logger.info('Shutting down ...') |
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def format_syslog_message(message: SyslogMessage) -> str: |
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"""Format a syslog message to be displayed on IRC.""" |
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def _generate() -> Iterator[str]: |
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if message.timestamp is not None: |
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timestamp_format = '%Y-%m-%d %H:%M:%S' |
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formatted_timestamp = message.timestamp.strftime(timestamp_format) |
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yield f'[{formatted_timestamp}] ' |
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if message.hostname is not None: |
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yield f'({message.hostname}) ' |
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severity_name = message.severity.name |
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# Important: The message text is a byte string. |
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message_text = message.message.decode(MESSAGE_TEXT_ENCODING) |
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yield f'[{severity_name}]: {message_text}' |
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111
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return ''.join(_generate()) |
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homeworkprod /
syslog2irc
