Logging with multiple handlers to different output, formatters

logger.py

import logging
from logging.handlers import HTTPHandler as HTTPLoggingHandler
from typing import Any


class ExternalFilter(logging.Filter):
    flag = "to_external_source"

    def filter(self, record: logging.LogRecord) -> bool:
        return getattr(record, self.flag, False)


class ExternalHTTPLogHandler(HTTPLoggingHandler):
    def mapLogRecord(self, record: logging.LogRecord) -> dict[str, Any]:
        return {
            "query_param_1": "value_1",
            "text": record.msg,
        }


http_handler = ExternalHTTPLoggingHandler(
    "host without `http(s)://` and without extra slashes",
    "url with slashes"
    secure=True,
)
http_handler.addFilter(ExternalFilter())
console_handler = logging.StreamHandler()

logger = logging.getLogger(__name__)
logger.setLevel(logging.DEBUG)

logger.addHandler(http_handler)
logger.addHandler(console_handler)

logger.debug("debug to console")
logger.info("info to console & http", extra={ExternalFilter.flag: True})
logger.warning("warning to console & http", extra={ExternalFilter.flag: True})