dify/api/extensions/ext_logging.py

import logging
import os
import sys
from logging.handlers import RotatingFileHandler

from flask import Flask


def init_app(app: Flask):
    log_handlers = None
    log_file = app.config.get("LOG_FILE")
    if log_file:
        log_dir = os.path.dirname(log_file)
        os.makedirs(log_dir, exist_ok=True)
        log_handlers = [
            RotatingFileHandler(
                filename=log_file,
                maxBytes=1024 * 1024 * 1024,
                backupCount=5,
            ),
            logging.StreamHandler(sys.stdout),
        ]

    logging.basicConfig(
        level=app.config.get("LOG_LEVEL"),
        format=app.config.get("LOG_FORMAT"),
        datefmt=app.config.get("LOG_DATEFORMAT"),
        handlers=log_handlers,
        force=True,
    )
    log_tz = app.config.get("LOG_TZ")
    if log_tz:
        from datetime import datetime

        import pytz

        timezone = pytz.timezone(log_tz)

        def time_converter(seconds):
            return datetime.utcfromtimestamp(seconds).astimezone(timezone).timetuple()

        for handler in logging.root.handlers:
            handler.formatter.converter = time_converter