浅析Flask如何使用日志功能

import logging
from logging.handlers import RotatingFileHandler
from flask import Flask

app = Flask(__name__)

# 配置日志记录
handler = RotatingFileHandler('app.log', maxBytes=10000, backupCount=1)
handler.setLevel(logging.INFO)

formatter = logging.Formatter('%(asctime)s %(levelname)s: %(message)s [in %(pathname)s:%(lineno)d]')
handler.setFormatter(formatter)

app.logger.addHandler(handler)

if not app.debug:
    # 如果不处于调试模式，将日志输出到 stdout
    stream_handler = logging.StreamHandler()
    stream_handler.setLevel(logging.INFO)
    app.logger.addHandler(stream_handler)

@app.route('/')
def index():
    app.logger.info('Processing request for index page')
    return 'Hello, world!'

import logging
logger = logging.getLogger(__name__)

from flask import render_template
from app import logger

@app.route('/about')
def about():
    logger.info('Rendering about page')
    return render_template('about.html')

# app.py
import logging
from flask import Flask

app = Flask(__name__)

# 配置日志记录
handler = logging.StreamHandler()
handler.setLevel(logging.INFO)

formatter = logging.Formatter('%(asctime)s - %(name)s - %(levelname)s - %(message)s')
handler.setFormatter(formatter)

app.logger.addHandler(handler)

# my_module.py
import logging
from flask import current_app

logger = logging.getLogger(__name__)

def do_something():
    # 获取当前应用程序的记录器对象
    app_logger = current_app.logger
    
    logger.info('Starting to do something...')
    
    # 进行一些操作
    app_logger.info('Doing something now...')
    
    logger.info('Finished doing something.')