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Flask.logger 可返回名为 'flask.app' 的日 志记录器，可用于应用的日志记录。
*****************************************************************
@app.route('/login', methods=['POST'])
def login():
user = get_user(request.form['username'])
if user.check_password(request.form['password']):
login_user(user)
app.logger.info('%s logged in successfully', user.username)
return redirect(url_for('index'))
else:
app.logger.info('%s failed to log in', user.username)
abort(401)
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基本配置
*****************************************************************
from logging.config import dictConfig
dictConfig({
'version': 1,
'formatters': {'default': {
'format': '[%(asctime)s] %(levelname)s in %(module)s: %(message)s',
}},
'handlers': {'wsgi': {
'class': 'logging.StreamHandler',
'stream': 'ext://flask.logging.wsgi_errors_stream',
'formatter': 'default'
}},
'root': {
'level': 'INFO',
'handlers': ['wsgi']
}
})
app = Flask(__name__)
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===============================================================================
发送错误信息邮件
*****************************************************************
import logging
from logging.handlers import SMTPHandler
mail_handler = SMTPHandler(
mailhost='127.0.0.1',
fromaddr='server-error@example.com',
toaddrs=['admin@example.com'],
subject='Application Error'
)
mail_handler.setLevel(logging.ERROR)
mail_handler.setFormatter(logging.Formatter(
'[%(asctime)s] %(levelname)s in %(module)s: %(message)s'
))
if not app.debug:
app.logger.addHandler(mail_handler)
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===============================================================================
注入请求信息
可以添加其他更多的信息
*****************************************************************
from flask import request
from flask.logging import default_handler
class RequestFormatter(logging.Formatter):
def format(self, record):
record.url = request.url
record.remote_addr = request.remote_addr
return super().format(record)
formatter = RequestFormatter(
'[%(asctime)s] %(remote_addr)s requested %(url)s\n'
'%(levelname)s in %(module)s: %(message)s'
)
default_handler.setFormatter(formatter)
mail_handler.setFormatter(formatter)
*****************************************************************
===============================================================================
其他库
*****************************************************************
from flask.logging import default_handler
root = logging.getLogger()
root.addHandler(default_handler)
root.addHandler(mail_handler)
单独配置每个记录器更好还是只配置一个根记录器更好，取决你的项目。:
for logger in (
app.logger,
logging.getLogger('sqlalchemy'),
logging.getLogger('other_package'),
):
logger.addHandler(default_handler)
logger.addHandler(mail_handler)
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