flask之日志的配置

1. 项目中，日志和配置文件都是单独在一个文件夹中，一般log文件夹和config文件夹，两个文件夹和manage.py在同一个目录下。

2. 配置日志前，先给flask装上script脚本扩展，Flask 1.1.1 版本

from flask.ext.script import Manager
# 报错 no module named flask.ext
解决办法：from flask_script import  Manager  网上说是新版flask推荐这种方式导入扩展包
# 继续报错：no module named flask_script 
解决办法：pip install flask_script
# 继续报错： ModuleNotFoundError: No module named 'setuptools'
    ----------------------------------------
ERROR: Command errored out with exit status 1: python setup.py egg_info Check the logs for full command output.
# 分析，原来是 没有安装 setuptools

# 安装 setuptools
pip install setuptools 

# pip install flask_script

# 然后解决问题

from flask_script import Manager

用Manager来管理app

manage.py

from logs.logs import create_app, setup_log
from flask import url_for,redirect
from flask_script import Manager
from config.config import Config
import logging

app = create_app("development")  # 这里通过一个函数创建了app的实例对象
manage = Manager(app) # 创建Manager的实例对象，参数是app对象


@app.route("/")
def index():
    logging.debug("测试打印日志")
    # logging.warning("测试打印日志")
    # logging.error("测试打印日志")
    return "index page"

# 传递路径参数，通过视图函数的形参传递
@app.route("/hello/<username>")
def hello(username):
    logging.debug(username)
    return "hello page" + username


# 转换器：可以将传递的参数进行类型转换
@app.route("/user/<int:p_id>")
def converter_int(p_id):
    logging.warning(str(p_id))
    return "p_id: " + str(p_id)

# 构建url
@app.route("/new")
def make_url():
    """
    url_for(视图函数的名字，链接后面的参数)
    :return:
    """
    new_url = url_for('hello', username="zhangyanyan")
    print(new_url)
    return redirect(new_url)


if __name__ == '__main__':

    manage.run()  启动方式变成：manage.py目录下，python manage.py runserver 启动项目

logs/logs.py

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


def setup_log(config_name):
    """

    :param config_name: 传入日志等级
    :return:
    """
    # 设置日志的的登记
    logging.basicConfig(level=config[config_name].LOG_LEVEL)
    # 创建日志记录器，设置日志的保存路径和每个日志的大小和日志的总大小
    file_log_handler = RotatingFileHandler("logs/log", maxBytes=1024*1024*100,backupCount=100)
    # 创建日志记录格式，日志等级，输出日志的文件名 行数 日志信息
    formatter = logging.Formatter("%(levelname)s %(filename)s: %(lineno)d %(message)s")
    # 为日志记录器设置记录格式
    file_log_handler.setFormatter(formatter)
    # 为全局的日志工具对象（flaks app使用的）加载日志记录器
    logging.getLogger().addHandler(file_log_handler)


def create_app(config_name):
    """

    :param config_name: info bug error
    :return:
    """
    # 创建app实例前先配置好日志文件
    setup_log(config_name)
    # 创建app实例对象
    app = Flask(__name__)
    # 实例对象从配置文件中加载配置
    app.config.from_object(config[config_name])   # 这里直接拿到的是类的名字，也就是引用
    return app

config/config.py

import logging


class Config(object):
    # 设置日志等级
    LOG_LEVEL = logging.DEBUG


class DevelopConfig(Config):
    """开发环境下的配置"""
    DEBUG = True


class ProductConfig(Config):
    """生成环境下的配置"""
    DEBUG = False
    LOG_LEVEL = logging.WARNING


class TestConfig(Config):
    """测试环境下的配置"""
    DEBUG = True
    TESTING = True


config = {
    "development": DevelopConfig,
    "production": ProductConfig,
    "testing": TestConfig,
}

logs/log文件

INFO _internal.py: 122  * Running on http://127.0.0.1:5000/ (Press CTRL+C to quit)
INFO _internal.py: 122  * Restarting with stat
WARNING _internal.py: 122  * Debugger is active!
INFO _internal.py: 122  * Debugger PIN: 340-059-688
DEBUG manage.py: 13 测试打印日志
WARNING manage.py: 14 测试打印日志
ERROR manage.py: 15 测试打印日志
INFO _internal.py: 122 127.0.0.1 - - [24/Nov/2019 15:10:29] "GET / HTTP/1.1" 200 -
INFO _internal.py: 122  * Detected change in '/Users/xxx/PycharmProjects/flask_project1/manage.py', reloading
INFO _internal.py: 122  * Restarting with stat
WARNING _internal.py: 122  * Debugger is active!
INFO _internal.py: 122  * Debugger PIN: 340-059-688
DEBUG manage.py: 22 zhang
INFO _internal.py: 122 127.0.0.1 - - [24/Nov/2019 15:12:01] "GET /hello/zhang HTTP/1.1" 200 -
INFO _internal.py: 122  * Detected change in '/Users/xxx/PycharmProjects/flask_project1/manage.py', reloading
INFO _internal.py: 122  * Restarting with stat
WARNING _internal.py: 122  * Debugger is active!
INFO _internal.py: 122  * Debugger PIN: 340-059-688

config.py中还可以进行好多的配置

例如：数据库的配置，密码的配置

具体的配置参看：https://www.cnblogs.com/alicelai1319/p/10289798.html