logging_slacker

Python log handler that posts to a Slack channel. Posts to the Slack API using Python Slack SDK.

Related Repos:

• Mathias Ose: slacker_log_handler
• log-to-slack
• python-slack-logger

Installation

pip install logging_slacker

Arguments

• slack_token (str): The Slack API token if not using webhook_url Generate a key at https://api.slack.com/
• channel (str): The Slack channel to post to if not using webhook_url
• webhook_url (str): The Slack webhook URL if using webhook_url
• is_webhook (bool): Whether to use webhook_url or not (Defaults to True)
• is_debug (bool): Doesn't send Slack messages if True (Defaults to False)
• stack_trace (bool): Whether to include the stacktrace in the Slack message (Defaults to True)
• username (str): The username to use for the Slack message (Not usable if using webhook_url)
• icon_url (str): The icon URL to use for the Slack message (Not usable if using webhook_url)
• icon_emoji (str): The icon emoji to use for the Slack message (Not usable if using webhook_url)
• msg_len (int): The maximum length of the Slack message (Defaults to 1300)
• traceback_len (int): The maximum length of the stack_trace (Defaults to 700)
• fail_silent (bool): Whether to fail silently if the Slack API returns an error (Defaults to False) Defaults to False. If your API key is invalid or for some other reason the API call returns an error, this option will silently ignore the API error. If you enable this setting, make sure you have another log handler that will also handle the same log events, or they may be lost entirely.

Example Python logging handler

This is how you use log_to_slack as a regular Python logging handler. This example will send a error message to a slack channel.

import logging
import os

from log_to_slack import SlackLogHandler
from log_to_slack.formatters import NoStacktraceFormatter, DefaultFormatter

WEBHOOK_URL = os.getenv("WEBHOOK_URL")

logger = logging.getLogger("debug_application")
logger.setLevel(logging.DEBUG)

default_formatter = DefaultFormatter("%(levelprefix)s %(asctime)s (%(name)s) %(message)s")
no_stacktrace_formatter = NoStacktraceFormatter("%(levelprefix)s %(asctime)s (%(name)s) %(message)s")

default_handler = logging.StreamHandler()
default_handler.setFormatter(default_formatter)
logger.addHandler(default_handler)

slack_handler = SlackLogHandler(webhook_url=WEBHOOK_URL, stack_trace=True)
slack_handler.setFormatter(no_stacktrace_formatter)
slack_handler.setLevel(logging.ERROR)
logger.addHandler(slack_handler)

# Main code
logger.debug("Test DEBUG")
logger.info("Test INFO")
logger.warning("Test WARNING")
logger.error("Test ERROR")
logger.fatal("Test FATAL")
logger.critical("Test CRITICAL")

try:
    raise Exception("Test exception")
except Exception as e:
    logger.exception(e)

Slack message formatting

This example use a subclass that will send a formatted message to a Slack channel. Learn More

class CustomLogHandler(SlackLogHandler):
    def build_msg(self, record):
        message = "> New message :\n" + record.getMessage()
        return message

License

Apache 2.0

See also: https://api.slack.com/terms-of-service